技术领域Technical Field
本发明属于CT机架和功能床对准技术领域，具体涉及一种CT机架和功能床的中心线对准的方法。The invention belongs to the technical field of alignment of a CT frame and a functional bed, and in particular relates to a method for aligning the center lines of a CT frame and a functional bed.
背景技术Background technique
CT机，又称计算机X线断层摄影机，广泛应用于临床医学领域。CT机与对应的功能床配合使用，患者躺在功能床上，由功能床送入CT机，进行检测。在CT机与对应的功能床安装定位时，两者的中心对准尤为关键，将直接影响扫描效果。目前，普遍使用建筑领域常用的标尺、角尺等测量对齐装置进行CT机与功能床的定位，导致CT机与功能床的对准精度较低，影响CT机的后续使用和检测。CT machines, also known as computerized tomography machines, are widely used in the field of clinical medicine. CT machines are used in conjunction with corresponding functional beds. Patients lie on the functional beds and are sent to the CT machines by the functional beds for testing. When installing and positioning the CT machine and the corresponding functional bed, the center alignment of the two is particularly critical, which will directly affect the scanning effect. At present, commonly used measuring and alignment devices such as rulers and angle rulers in the construction field are commonly used to position the CT machine and the functional bed, resulting in low alignment accuracy between the CT machine and the functional bed, which affects the subsequent use and testing of the CT machine.
发明内容Summary of the invention
针对上述问题，本发明提供一种CT机架和功能床的中心线对准方法，包括以下步骤：In view of the above problems, the present invention provides a method for aligning the center lines of a CT frame and a functional bed, comprising the following steps:
S1：将激光对齐器放置在功能床床面与地面之间，先后在功能床的长度方向和宽度方向上调节功能床，使得床面与地面相平行；S1: Place the laser aligner between the functional bed surface and the ground, and adjust the functional bed in the length direction and width direction of the functional bed so that the bed surface is parallel to the ground;
S2：将激光对齐器挂设在功能床的侧面，移动功能床，使得激光对齐器处于CT机架与功能床之间；S2: Hang the laser aligner on the side of the functional bed, and move the functional bed so that the laser aligner is between the CT gantry and the functional bed;
S3：调节CT机架的位置，使得CT机架的平面与功能床的侧面相平行；S3: Adjust the position of the CT gantry so that the plane of the CT gantry is parallel to the side of the functional bed;
S4：将激光对齐器平放在功能床的床面上，在水平方向上左右调节CT机架的位置，使得功能床的中心线与CT机架的中心线处于同一竖直面上。S4: Place the laser aligner flat on the bed surface of the functional bed, and adjust the position of the CT gantry left and right in the horizontal direction so that the center line of the functional bed and the center line of the CT gantry are on the same vertical plane.
可选的，所述激光对齐器包括主板体、激光计米器、两个激光位移传感器和两个移动柱，主板体为中空的扁平的长方体，主板体内部的中心设有激光计米器，主板体的顶面对应激光计米器的位置设有窗口，使得激光计米器的激光能射出主板体；Optionally, the laser aligner includes a main board, a laser meter, two laser displacement sensors and two moving columns, the main board is a hollow flat cuboid, the laser meter is arranged at the center of the main board, and a window is arranged on the top surface of the main board corresponding to the position of the laser meter, so that the laser of the laser meter can be emitted from the main board;
主板体的顶面设有两个相互平行的导轨，移动柱的两端分别滑动连接两个导轨，每一个移动柱上滑动连接一个激光位移传感器，使用时，使得激光计米器和两个激光位移传感器的发光点处于同一条直线上，激光计米器和两个激光位移传感器通讯连接外部的数据分析装置。Two parallel guide rails are provided on the top surface of the main board body. The two ends of the moving column are slidably connected to the two guide rails respectively. A laser displacement sensor is slidably connected to each moving column. When in use, the light emitting points of the laser meter and the two laser displacement sensors are on the same straight line. The laser meter and the two laser displacement sensors are communicated and connected to an external data analysis device.
所述主板体的顶面和底面均为光滑平整的平面，在各个方向上都不具有倾斜角度；顶面和底面之间设有两个相对的长侧面和两个相对的宽侧面。The top surface and the bottom surface of the main board body are both smooth and flat planes, and have no tilt angle in any direction; two opposite long side surfaces and two opposite wide side surfaces are arranged between the top surface and the bottom surface.
进一步可选的，所述主板体的顶面靠近两个长侧边的位置分别设有一个凸出的导轨，导轨平行于主板体顶面的长侧边，导轨的两侧分别设有向内凹陷的凹槽；Further optionally, a protruding guide rail is respectively provided on the top surface of the main board body near the two long sides, the guide rail is parallel to the long sides of the top surface of the main board body, and inwardly concave grooves are respectively provided on both sides of the guide rail;
移动柱垂直于导轨，移动柱的两端分别设有卡接滑块，卡接滑块具有配合导轨凹槽的凸起，每个卡接滑块的两个凸起分别卡入对应导轨的凹槽，从而平稳的沿着导轨移动。The moving column is perpendicular to the guide rail, and a clamping slider is provided at both ends of the moving column. The clamping slider has a protrusion that matches the groove of the guide rail, and the two protrusions of each clamping slider are respectively clamped into the groove of the corresponding guide rail, so that it moves smoothly along the guide rail.
通过移动柱的移动，改变激光位移传感器与激光计米器的位置。卡接滑块的两侧分别卡接导轨的两侧，使得移动柱移动时始终垂直于导轨，不会轻易改变角度，提高激光对齐检测的准确性。The positions of the laser displacement sensor and the laser meter are changed by moving the moving column. The two sides of the clamping slider are clamped to the two sides of the guide rail respectively, so that the moving column is always perpendicular to the guide rail when moving, and the angle will not change easily, thereby improving the accuracy of laser alignment detection.
进一步可选的，所述移动柱上滑动连接移动块，移动块的顶面的中央设有激光位移传感器，移动块的底面滑动连接移动柱；Further optionally, the moving column is slidably connected to a moving block, a laser displacement sensor is provided at the center of the top surface of the moving block, and the bottom surface of the moving block is slidably connected to the moving column;
移动块的两侧均设有锁紧机构，移动块的任意一侧设有向外凸出的指针，指针与激光位移传感器的发光点处于同一直线上，且指针平行于导轨，便于将激光位移传感器的发光点与激光计米器对齐。Locking mechanisms are provided on both sides of the moving block, and a pointer protruding outward is provided on either side of the moving block. The pointer is in the same straight line as the light-emitting point of the laser displacement sensor, and the pointer is parallel to the guide rail, which is convenient for aligning the light-emitting point of the laser displacement sensor with the laser meter.
进一步可选的，所述主板体的顶面设有一条平行于导轨的刻度线，刻度线经过所述窗口对应激光计米器的发光点的位置，刻度线的两端延伸至主板体顶面的两个宽侧边，刻度线的零点为窗口处的激光计米器的发光点。Further optionally, a scale line parallel to the guide rail is provided on the top surface of the main board body, the scale line passes through the position of the light-emitting point of the laser meter corresponding to the window, and both ends of the scale line extend to the two wide sides of the top surface of the main board body, and the zero point of the scale line is the light-emitting point of the laser meter at the window.
可选的，步骤S1之前要调整准备激光对齐器，具体的，将移动块沿着移动柱移动至刻度线附近，指针的针尖对齐刻度线，使得激光位移传感器的发光点与激光计米器的发光点处于同一直线上，锁紧机构固定移动块在移动柱上的位置；Optionally, before step S1, a laser aligner needs to be adjusted and prepared. Specifically, the moving block is moved along the moving column to the vicinity of the scale line, and the needle tip of the pointer is aligned with the scale line, so that the light emitting point of the laser displacement sensor and the light emitting point of the laser meter are in the same straight line, and the locking mechanism fixes the position of the moving block on the moving column;
两个移动柱沿着上下两个导轨调整位置，使得两个激光位移传感器分别处于窗口的左右两侧，通过刻度线指示激光位移传感器的发光点与激光计米器的发光点之间的距离，使得两个激光位移传感器的发光点与激光计米器的发光点之间的距离相等。The two moving columns adjust their positions along the upper and lower guide rails so that the two laser displacement sensors are located on the left and right sides of the window respectively. The distance between the light-emitting point of the laser displacement sensor and the light-emitting point of the laser meter is indicated by the scale line, so that the distance between the light-emitting point of the two laser displacement sensors and the light-emitting point of the laser meter is equal.
所述锁紧机构可以采用多种形式，例如，移动块的侧面设有贯穿孔，销钉穿过贯穿孔并抵住移动柱的侧面。The locking mechanism may be in various forms. For example, a through hole is provided on the side of the moving block, and a pin passes through the through hole and abuts against the side of the moving column.
作为一种具体的实施方式，窗口左侧移动块的左侧设有水平向左凸出的第一指针，第一指针的针尖与左侧移动块上的激光位移传感器的发光点的距离固定且已知(可记为第一间距)；窗口右侧移动块的右侧设有水平向右凸出的第二指针，第二指针的针尖与右侧移动块上的激光位移传感器的发光点的距离固定且已知(可记为第二间距)；在两个移动柱移动时，读取第一指针的针尖所指的刻度的数值，再减去第一间距，得到左侧激光位移传感器的发光点与激光计米器的发光点之间的距离；读取第二指针的针尖所指的刻度的数值，再减去第二间距，得到右侧激光位移传感器的发光点与激光计米器的发光点之间的距离。As a specific implementation, a first pointer protruding horizontally to the left is provided on the left side of the moving block on the left side of the window, and the distance between the tip of the first pointer and the light-emitting point of the laser displacement sensor on the left moving block is fixed and known (which can be recorded as the first spacing); a second pointer protruding horizontally to the right is provided on the right side of the moving block on the right side of the window, and the distance between the tip of the second pointer and the light-emitting point of the laser displacement sensor on the right moving block is fixed and known (which can be recorded as the second spacing); when the two moving columns move, the value of the scale pointed by the tip of the first pointer is read, and the first spacing is subtracted to obtain the distance between the light-emitting point of the left laser displacement sensor and the light-emitting point of the laser meter; the value of the scale pointed by the tip of the second pointer is read, and the second spacing is subtracted to obtain the distance between the light-emitting point of the right laser displacement sensor and the light-emitting point of the laser meter.
可选的，步骤S1中，将激光对齐器平放在地面上，主板体的底面正对地面，顶面正对上方功能床的背面，调整主板体的放置方向，使得刻度线的长度方向顺应功能床的长度方向；Optionally, in step S1, the laser aligner is placed flat on the ground, with the bottom surface of the main board facing the ground and the top surface facing the back of the functional bed above, and the placement direction of the main board is adjusted so that the length direction of the scale line conforms to the length direction of the functional bed;
开启激光计米器和两个激光位移传感器，三条激光线射到功能床背面，数据分析装置分别得到激光计米器、两个激光位移传感器与功能床背面的间距；Turn on the laser meter and two laser displacement sensors, and shoot three laser lines to the back of the functional bed. The data analysis device obtains the distances between the laser meter, the two laser displacement sensors and the back of the functional bed respectively.
调节功能床长度方向上的两端的高度，使得两个激光位移传感器与功能床背面的间距相等，使得功能床在长度方向上与地面和主板体平行；Adjust the heights of both ends of the functional bed in the length direction so that the distances between the two laser displacement sensors and the back of the functional bed are equal, and the functional bed is parallel to the ground and the main board in the length direction;
调整主板体的放置方向，使得刻度线的长度方向顺应功能床的宽度方向，调节功能床宽度方向上的两端的高度，再次使得两个激光位移传感器与功能床背面的间距相等，功能床背面与床面相平行，使得功能床在宽度方向上与地面和主板体平行。Adjust the placement direction of the main board so that the length direction of the scale line conforms to the width direction of the functional bed, adjust the height of the two ends in the width direction of the functional bed, and make the distance between the two laser displacement sensors and the back of the functional bed equal again. The back of the functional bed is parallel to the bed surface, so that the functional bed is parallel to the ground and the main board in the width direction.
功能床背面与床面相平行，经过步骤S1的调节，使得功能床在长度和宽度方向上均与地面平行，就能完成功能床的调平，再以功能床为基准，对CT机架进行调节。The back of the functional bed is parallel to the bed surface. After adjustment in step S1, the functional bed is parallel to the ground in both length and width directions, and the leveling of the functional bed is completed. Then, the CT rack is adjusted based on the functional bed.
可选的，所述主板体的一个长侧面设有两个安装凹槽，用于安装挂钩一，使得主板体能挂设在功能床的侧面；Optionally, one long side surface of the main board body is provided with two mounting grooves for mounting a hook 1, so that the main board body can be hung on the side surface of the functional bed;
两个安装凹槽分别靠近主板体的两个宽侧面，安装凹槽内设有若干个螺孔；挂钩一的外侧具有与功能床侧面框架适配的卡接部件，挂钩一内侧的形状适配于安装凹槽的形状，挂钩一内侧通过螺丝与安装凹槽的螺孔连接，挂钩一安装在安装凹槽内后，挂钩一的顶面与主板体的长侧面齐平。The two mounting grooves are respectively close to the two wide sides of the main board body, and a number of screw holes are arranged in the mounting grooves; the outer side of hook one has a clamping component adapted to the side frame of the functional bed, and the shape of the inner side of hook one is adapted to the shape of the mounting groove. The inner side of hook one is connected to the screw holes of the mounting groove by screws. After hook one is installed in the mounting groove, the top surface of hook one is flush with the long side of the main board body.
可选的，所述激光对齐器还包括辅助调平装置，辅助调平装置包括托架和若干个调平螺栓，托架包括两个竖直杆和一个横杆，竖直杆的顶端设有挂钩二，挂钩二的形状适配于功能床侧面框架，使得托架挂设在功能床侧面框架；Optionally, the laser aligner further comprises an auxiliary leveling device, the auxiliary leveling device comprises a bracket and a plurality of leveling bolts, the bracket comprises two vertical rods and a horizontal rod, the top end of the vertical rod is provided with a hook 2, the shape of the hook 2 is adapted to the side frame of the functional bed, so that the bracket is hung on the side frame of the functional bed;
主板体处于两个竖直杆之间，横杆处于主板体的下方，横杆的两端分别连接两个竖直杆，横杆上设有两个通孔，通孔内壁设有内螺纹，两个通孔分别靠近主板体的两个宽侧面；面对横杆的主板体长侧面上设有两个凹孔，凹孔与通孔一一对应，螺栓穿过通孔，且顶部抵住凹孔，通过螺栓伸出横杆的长度调节主板体长度方向上的水平位置。The main board body is located between the two vertical rods, the cross bar is located below the main board body, the two ends of the cross bar are respectively connected to the two vertical rods, the cross bar is provided with two through holes, the inner walls of the through holes are provided with internal threads, and the two through holes are respectively close to the two wide sides of the main board body; two concave holes are provided on the long side of the main board body facing the cross bar, the concave holes correspond to the through holes one by one, the bolts pass through the through holes, and the tops are against the concave holes, and the horizontal position in the length direction of the main board body is adjusted by the length of the bolts extending out of the cross bar.
进一步可选的，当托架和主板体都挂在功能床的侧面后，一个竖直杆对应主板体的一个上顶角的位置设置红外发射器或激光发射器，另一个竖直杆对应红外发射器或激光发射器的位置设有接收器，用于检测处于顶部的主板体长侧面是否水平；接收器、红外发射器或激光发射器通讯连接外部的数据分析装置。Further optionally, when the bracket and the main board body are hung on the side of the functional bed, an infrared transmitter or a laser transmitter is set at a position of a vertical rod corresponding to an upper corner of the main board body, and a receiver is set at a position of another vertical rod corresponding to the infrared transmitter or the laser transmitter, which is used to detect whether the long side of the main board body at the top is horizontal; the receiver, infrared transmitter or laser transmitter are communicatively connected to an external data analysis device.
可选的，所述主板体的顶面与两侧的宽侧面交接处的两条竖直的棱上设有至少一道向内凹陷的辅助固定槽，两条棱相同高度上的辅助固定槽之间的连线平行于导轨。Optionally, at least one inwardly recessed auxiliary fixing groove is provided on two vertical edges where the top surface of the main board body intersects with the wide side surfaces on both sides, and a line connecting the auxiliary fixing grooves at the same height of the two edges is parallel to the guide rail.
可选的，步骤S2具体包括以下步骤：Optionally, step S2 specifically includes the following steps:
(1)选择与功能床背面相垂直的功能床侧面，该功能床侧面为竖直的；(1) Select a side of the functional bed that is perpendicular to the back of the functional bed, and the side of the functional bed is vertical;
(2)将挂钩一的外侧搭接或卡接在竖直的功能床侧面的框架上，主板体的底面面对功能床侧面的框架，此时主板体的顶面和底面均平行与功能床侧面；(2) Overlap or clip the outer side of hook 1 onto the frame on the side of the vertical functional bed, with the bottom surface of the main board body facing the frame on the side of the functional bed. At this time, the top surface and bottom surface of the main board body are parallel to the side of the functional bed;
(3)托架通过挂钩二挂在相同的功能床侧面的框架上，主板体处于托架内部；(3) The bracket is hung on the frame on the side of the same functional bed through hook 2, and the main board body is inside the bracket;
(4)开启竖直杆上的红外发射器或激光发射器、接收器，通过数据分析装置判断接收器是否接收到红外或激光信号，从而判断主板体顶部的长侧面沿着功能床的床面是否水平，若不水平，通过所述螺栓和横杆调平主板体的长侧面，进而调平主板体的刻度线；(4) Turn on the infrared transmitter or laser transmitter and receiver on the vertical rod, and determine whether the receiver receives the infrared or laser signal through the data analysis device, so as to determine whether the long side of the top of the main board body is level along the bed surface of the functional bed. If not, level the long side of the main board body through the bolts and the cross bar, and then level the scale line of the main board body;
(5)主板体的刻度线调平之后，激光计米器和两个激光位移传感器处于同一水平线上，将功能床挂有激光对齐器的部分平移进入圆筒状的CT机架内部。(5) After the scale lines of the main body are leveled, the laser meter and the two laser displacement sensors are on the same horizontal line, and the part of the functional bed with the laser aligner is translated into the cylindrical CT frame.
进一步可选的，步骤(3)中，为了使得功能床侧面的框架与对应的主板体底面的部分完全贴合，还可以使用至少一条弹性绑带，弹性绑带沿着主板体的长度方向横跨过主板体顶面，弹性绑带卡接在所述辅助固定槽内，弹性绑带的两端分别连接吸盘或磁铁，以便将弹性绑带固定在功能床侧面的框架上，此时主板体底面紧贴功能床侧面的框架，保证主板体底面(以及顶面)呈竖直。Further optionally, in step (3), in order to make the frame on the side of the functional bed completely fit with the corresponding part of the bottom surface of the main board body, at least one elastic strap can be used. The elastic strap spans across the top surface of the main board body along the length direction of the main board body, and the elastic strap is clamped in the auxiliary fixing groove. The two ends of the elastic strap are respectively connected to suction cups or magnets to fix the elastic strap to the frame on the side of the functional bed. At this time, the bottom surface of the main board body is close to the frame on the side of the functional bed, ensuring that the bottom surface (and top surface) of the main board body is vertical.
进一步可选的，步骤(4)中，若接收器没有接收到光信号，则表示主板体顶部的长侧面为倾斜的，且阻断了光的传播；观察主板体的顶部，找到阻断光通路的位置，将靠近该阻断位置的螺栓向下旋转，使得靠近该阻断位置的主板体部分逐渐下移，直至接收器接收到光信号，表示排除了阻断，停止转动螺栓，此时，主板体顶部的长侧面处于水平状态。Further optionally, in step (4), if the receiver does not receive the light signal, it means that the long side surface of the top of the main board body is inclined and blocks the propagation of light; observe the top of the main board body to find the position where the light path is blocked, rotate the bolt close to the blocking position downward, so that the part of the main board body close to the blocking position gradually moves downward until the receiver receives the light signal, indicating that the blockage is eliminated, and stop turning the bolt. At this time, the long side surface of the top of the main board body is in a horizontal state.
进一步可选的，步骤(4)中，若接收器接收到光信号，则可能是主板体顶部的长侧面处于水平状态，也可能是该长侧面倾斜但对齐红外发射器或激光发射器的顶角位置较高；Further optionally, in step (4), if the receiver receives an optical signal, it is possible that the long side surface at the top of the main board body is in a horizontal state, or it is possible that the long side surface is tilted but aligned with the top angle of the infrared transmitter or the laser transmitter at a higher position;
此时，将远离红外发射器或激光发射器的螺栓向上旋转，使得远离红外发射器或激光发射器的顶角逐渐上升，若接收器立即无法接收光信号，则表示调整之前主板体已经水平，将远离红外发射器或激光发射器的螺栓向下旋转，使得接收器重新接收到光信号，即完成调平；若接收器一直能收到光信号，则表示主板体倾斜，该螺栓继续向上旋转，直至接收器无法接收光信号，再将该螺栓向下旋转，直至接收器再次接收到光信号，停止转动螺栓，此时，主板体顶部的长侧面处于水平状态。At this time, rotate the bolt away from the infrared transmitter or laser transmitter upward so that the top angle away from the infrared transmitter or laser transmitter gradually rises. If the receiver cannot receive the light signal immediately, it means that the main board body was level before adjustment. Rotate the bolt away from the infrared transmitter or laser transmitter downward so that the receiver can receive the light signal again, and the leveling is completed. If the receiver can always receive the light signal, it means that the main board body is tilted, and the bolt continues to rotate upward until the receiver cannot receive the light signal, and then rotate the bolt downward until the receiver receives the light signal again, and stop rotating the bolt. At this time, the long side of the top of the main board body is in a horizontal state.
CT机架为空心的圆柱形，放置时两个圆侧面均敞开且竖直，两个圆侧面的圆心之间的连线为CT机架中心线，CT机架的中心线呈水平。功能床的中心线平行于功能床的长度方向，功能床的中心线应该与CT机架中心线相平行，且当功能床平移进入CT机架后，功能床的中心线与CT机架中心线处于同一竖直面上。The CT rack is a hollow cylinder. When placed, the two circular sides are open and vertical. The line between the centers of the two circular sides is the center line of the CT rack, and the center line of the CT rack is horizontal. The center line of the functional bed is parallel to the length of the functional bed. The center line of the functional bed should be parallel to the center line of the CT rack, and when the functional bed is translated into the CT rack, the center line of the functional bed and the center line of the CT rack are on the same vertical plane.
为了达到上述要求，本发明先以地面为基准，使用激光对齐器，将功能床的整个床体调节为水平的，即平行于地面。功能床床体水平，则功能床的床面(顶面)和底面均水平，贴合功能床侧面的框架为竖直的。利用挂钩一、弹性绑带和辅助固定槽将主板体的底面与功能床侧面的框架平行贴合，保证主板体的顶面竖直。然后，通过辅助调平装置将所述刻度线调节成水平，使得激光计米器和两个激光位移传感器处于同一水平线上。In order to achieve the above requirements, the present invention first uses the ground as a reference and uses a laser aligner to adjust the entire bed body of the functional bed to be horizontal, that is, parallel to the ground. If the functional bed body is horizontal, the bed surface (top surface) and bottom surface of the functional bed are both horizontal, and the frame attached to the side of the functional bed is vertical. Use hook 1, elastic straps and auxiliary fixing grooves to parallel fit the bottom surface of the main board body with the frame on the side of the functional bed to ensure that the top surface of the main board body is vertical. Then, the scale line is adjusted to be horizontal through the auxiliary leveling device so that the laser meter and the two laser displacement sensors are on the same horizontal line.
可选的，步骤S3具体包括以下步骤：Optionally, step S3 specifically includes the following steps:
(6)开启激光计米器和两个激光位移传感器，三条激光线射到CT机架的内壁上，数据分析装置分别得到激光计米器、两个激光位移传感器与CT机架内壁的间距；(6) Turn on the laser meter and two laser displacement sensors, and project three laser lines onto the inner wall of the CT gantry. The data analysis device obtains the distances between the laser meter, the two laser displacement sensors, and the inner wall of the CT gantry respectively;
(7)调整CT机架的位置，使得两个激光位移传感器与CT机架内壁的间距相等，则被激光照射到的CT机架内壁平行于主板体顶面、平行于功能床的中心线，从而CT机架的中心线平行于功能床的中心线。(7) The position of the CT gantry is adjusted so that the distances between the two laser displacement sensors and the inner wall of the CT gantry are equal. Then, the inner wall of the CT gantry irradiated by the laser is parallel to the top surface of the main body and the center line of the functional bed, and thus the center line of the CT gantry is parallel to the center line of the functional bed.
由于CT机架是卧式放置的，功能床的侧面面对的CT机架内壁是个曲面，在竖直方向上，这个曲面的任一位置到功能床侧面的距离都不相等、也不存在平行关系。本发明将主板体横向放置(即刻度线平行于功能床的中心线)，只选取CT机架内壁的一条水平线部分作为调节对象，而不涉及CT机架内壁的竖直方向，激光计米器和两个激光位移传感器的激光照射到CT机架内壁上，调整CT机架的位置，使得两个激光位移传感器与CT机架内壁的间距相等，则上述调节对象平行于刻度线，使得CT机架的内壁在水平方向上平行于刻度线，从而CT机架的中心线平行于功能床的中心线。Since the CT rack is placed horizontally, the inner wall of the CT rack facing the side of the functional bed is a curved surface. In the vertical direction, the distance from any position of this curved surface to the side of the functional bed is not equal and there is no parallel relationship. The present invention places the main body horizontally (that is, the scale line is parallel to the center line of the functional bed), and only selects a horizontal line part of the inner wall of the CT rack as the adjustment object, without involving the vertical direction of the inner wall of the CT rack. The laser of the laser meter and the two laser displacement sensors are irradiated on the inner wall of the CT rack, and the position of the CT rack is adjusted so that the spacing between the two laser displacement sensors and the inner wall of the CT rack is equal. Then, the above-mentioned adjustment object is parallel to the scale line, so that the inner wall of the CT rack is parallel to the scale line in the horizontal direction, so that the center line of the CT rack is parallel to the center line of the functional bed.
可选的，步骤S4具体包括以下步骤：Optionally, step S4 specifically includes the following steps:
(8)将激光对齐器平放在功能床的床面上，通过测量功能床，将刻度线的零点对准功能床床面的中心线；(8) Place the laser aligner flat on the bed surface of the functional bed, and align the zero point of the scale line with the center line of the bed surface of the functional bed by measuring the functional bed;
(9)开启激光计米器和两个激光位移传感器，三条激光线射到CT机架顶部的内壁上，数据分析装置分别得到激光计米器、两个激光位移传感器与CT机架顶部内壁的间距；(9) Turn on the laser meter and two laser displacement sensors, and project three laser lines onto the inner wall of the top of the CT gantry. The data analysis device obtains the distances between the laser meter, the two laser displacement sensors, and the inner wall of the top of the CT gantry respectively;
(10)在水平方向上左右调节CT机架的位置，使得两个激光位移传感器与CT机架顶部内壁的间距相等，则功能床的中心线与CT机架中心线处于同一竖直面上。(10) The position of the CT gantry is adjusted left and right in the horizontal direction so that the distances between the two laser displacement sensors and the inner wall of the top of the CT gantry are equal, and the center line of the functional bed and the center line of the CT gantry are in the same vertical plane.
进一步可选的，步骤(9)中，还可以用弹性绑带固定主板体的位置，弹性绑带沿着主板体的长度方向横跨过主板体顶面，弹性绑带卡接在辅助固定槽内，通过弹性绑带将主板体底面紧贴功能床床面，保证主板体底面(以及顶面)呈水平。Further optionally, in step (9), the position of the main board body can be fixed by an elastic strap, the elastic strap spans across the top surface of the main board body along the length direction of the main board body, the elastic strap is clipped into the auxiliary fixing groove, and the bottom surface of the main board body is pressed against the functional bed surface by the elastic strap to ensure that the bottom surface (and top surface) of the main board body is level.
步骤S4中，从CT机架的圆形开口沿着CT机架的中心线看，CT机架的中心线所在的竖直平面只有一个，功能床的中心线处于这个竖直平面上即可，高低位置不限。本发明选取CT机架顶部的内壁，主板体的顶面面向CT机架顶部的内壁，此时主板体刻度线的零点(即激光计米器)处于功能床的中心线上，在水平方向上左右调节CT机架的位置，当激光计米器的激光处于CT机架中心线所在的竖直面上时，则两侧的激光位移传感器与CT机架顶部内壁的间距相等。In step S4, from the circular opening of the CT frame along the center line of the CT frame, there is only one vertical plane where the center line of the CT frame is located, and the center line of the functional bed can be on this vertical plane, and the height position is not limited. The present invention selects the inner wall of the top of the CT frame, and the top surface of the main board body faces the inner wall of the top of the CT frame. At this time, the zero point of the main board body scale line (i.e., the laser meter) is on the center line of the functional bed. The position of the CT frame is adjusted left and right in the horizontal direction. When the laser of the laser meter is on the vertical plane where the center line of the CT frame is located, the laser displacement sensors on both sides are equal to the distance between the inner wall of the top of the CT frame.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为激光对齐器的结构示意图；FIG1 is a schematic diagram of the structure of a laser aligner;
图2为主板体上部的侧面示意图；FIG2 is a side view of the upper portion of the main board body;
图3为激光对齐器的测量原理示意图；FIG3 is a schematic diagram of the measurement principle of a laser aligner;
图4为辅助调平装置与主板体配合的示意图；FIG4 is a schematic diagram of the cooperation between the auxiliary leveling device and the main board;
图5为CT机架的中心线平行于功能床的中心线时的侧视示意图；FIG5 is a side view schematic diagram when the center line of the CT gantry is parallel to the center line of the functional bed;
图6为CT机架的中心线与功能床的中心线处于同一竖直面时的侧视示意图。FIG6 is a schematic side view showing the case where the center line of the CT gantry and the center line of the functional bed are in the same vertical plane.
附图中，1-主板体，2-激光计米器，3-激光位移传感器，4-移动柱，5-窗口，6-导轨，7-宽侧面，8-移动块，9-指针，10-刻度线，11-长侧面，12-挂钩一，13-竖直杆，14-横杆，15-螺栓，16-接收器，17-红外发射器，18-主板体的顶面。In the accompanying drawings, 1-main board, 2-laser meter, 3-laser displacement sensor, 4-moving column, 5-window, 6-guide rail, 7-wide side, 8-moving block, 9-pointer, 10-scale line, 11-long side, 12-hook one, 13-vertical rod, 14-cross rod, 15-bolt, 16-receiver, 17-infrared transmitter, 18-top surface of the main board.
具体实施方式Detailed ways
本实施例提供一种CT机架和功能床的中心线对准方法，包括以下步骤：This embodiment provides a method for aligning the center lines of a CT gantry and a functional bed, comprising the following steps:
S1：将激光对齐器放置在功能床床面与地面之间，先后在功能床的长度方向和宽度方向上调节功能床，使得床面与地面相平行；S1: Place the laser aligner between the functional bed surface and the ground, and adjust the functional bed in the length direction and width direction of the functional bed so that the bed surface is parallel to the ground;
S2：将激光对齐器挂设在功能床的侧面，移动功能床，使得激光对齐器处于CT机架与功能床之间；S2: Hang the laser aligner on the side of the functional bed, and move the functional bed so that the laser aligner is between the CT gantry and the functional bed;
S3：调节CT机架的位置，使得CT机架的平面与功能床的侧面相平行；S3: Adjust the position of the CT gantry so that the plane of the CT gantry is parallel to the side of the functional bed;
S4：将激光对齐器平放在功能床的床面上，在水平方向上左右调节CT机架的位置，使得功能床的中心线与CT机架的中心线处于同一竖直面上。S4: Place the laser aligner flat on the bed surface of the functional bed, and adjust the position of the CT gantry left and right in the horizontal direction so that the center line of the functional bed and the center line of the CT gantry are on the same vertical plane.
可选的，如图1-图2所示，所述激光对齐器包括主板体1、激光计米器2、两个激光位移传感器3和两个移动柱4，主板体1为中空的扁平的长方体，主板体1内部的中心设有激光计米器2，主板体的顶面18对应激光计米器2的位置设有窗口5，使得激光计米器2的激光能射出主板体1；Optionally, as shown in FIG. 1-2, the laser aligner includes a main board body 1, a laser meter 2, two laser displacement sensors 3 and two moving columns 4, the main board body 1 is a hollow flat cuboid, the laser meter 2 is arranged at the center of the main board body 1, and a window 5 is arranged on the top surface 18 of the main board body corresponding to the position of the laser meter 2, so that the laser of the laser meter 2 can be emitted from the main board body 1;
主板体的顶面18设有两个相互平行的导轨6，移动柱4的两端分别滑动连接两个导轨6，每一个移动柱4上滑动连接一个激光位移传感器3，使用时，使得激光计米器2和两个激光位移传感器3的发光点处于同一条直线上，激光计米器2和两个激光位移传感器3通讯连接外部的数据分析装置。The top surface 18 of the main board body is provided with two mutually parallel guide rails 6, and the two ends of the moving column 4 are respectively slidably connected to the two guide rails 6, and a laser displacement sensor 3 is slidably connected to each moving column 4. When in use, the light-emitting points of the laser meter 2 and the two laser displacement sensors 3 are on the same straight line, and the laser meter 2 and the two laser displacement sensors 3 are communicated and connected to an external data analysis device.
进一步可选的，所述主板体的顶面18靠近两个长侧边的位置分别设有一个凸出的导轨6，导轨6平行于主板体顶面的长侧边，导轨6的两侧分别设有向内凹陷的凹槽；Further optionally, a protruding guide rail 6 is respectively provided on the top surface 18 of the main board body near the two long sides, the guide rail 6 is parallel to the long sides of the top surface of the main board body, and inwardly concave grooves are respectively provided on both sides of the guide rail 6;
移动柱4垂直于导轨6，移动柱4的两端分别设有卡接滑块，卡接滑块具有配合导轨6凹槽的凸起，每个卡接滑块的两个凸起分别卡入对应导轨6的凹槽，从而平稳的沿着导轨6移动。The moving column 4 is perpendicular to the guide rail 6 , and a snap-in slider is provided at both ends of the moving column 4 . The snap-in slider has a protrusion that matches the groove of the guide rail 6 , and the two protrusions of each snap-in slider are respectively snapped into the groove of the corresponding guide rail 6 , so that it can move smoothly along the guide rail 6 .
进一步可选的，所述移动柱4上滑动连接移动块8，移动块8的顶面的中央设有激光位移传感器3，移动块8的底面滑动连接移动柱4；Further optionally, the moving column 4 is slidably connected to the moving block 8, a laser displacement sensor 3 is provided at the center of the top surface of the moving block 8, and the bottom surface of the moving block 8 is slidably connected to the moving column 4;
移动块8的两侧均设有锁紧机构，移动块8的任意一侧设有向外凸出的指针9，指针9与激光位移传感器3的发光点处于同一直线上，且指针9平行于导轨6，便于将激光位移传感器3的发光点与激光计米器2对齐。Locking mechanisms are provided on both sides of the moving block 8, and a pointer 9 protruding outward is provided on any side of the moving block 8. The pointer 9 is on the same straight line as the light-emitting point of the laser displacement sensor 3, and the pointer 9 is parallel to the guide rail 6, which is convenient for aligning the light-emitting point of the laser displacement sensor 3 with the laser meter 2.
进一步可选的，所述主板体的顶面18设有一条平行于导轨6的刻度线10，刻度线10经过所述窗口5对应激光计米器2的发光点的位置，刻度线10的两端延伸至主板体顶面的两个宽侧边，刻度线10的零点为窗口5处的激光计米器2的发光点。Further optionally, the top surface 18 of the main board body is provided with a scale line 10 parallel to the guide rail 6, the scale line 10 passes through the position of the light-emitting point of the laser meter 2 corresponding to the window 5, and the two ends of the scale line 10 extend to the two wide sides of the top surface of the main board body, and the zero point of the scale line 10 is the light-emitting point of the laser meter 2 at the window 5.
可选的，步骤S1之前要调整准备激光对齐器，具体的，将移动块8沿着移动柱4移动至刻度线10附近，指针9的针尖对齐刻度线10，使得激光位移传感器3的发光点与激光计米器2的发光点处于同一直线上，锁紧机构固定移动块8在移动柱4上的位置；Optionally, before step S1, a laser aligner needs to be adjusted and prepared. Specifically, the moving block 8 is moved along the moving column 4 to the vicinity of the scale line 10, and the needle tip of the pointer 9 is aligned with the scale line 10, so that the light emitting point of the laser displacement sensor 3 and the light emitting point of the laser meter 2 are on the same straight line, and the locking mechanism fixes the position of the moving block 8 on the moving column 4;
两个移动柱4沿着上下两个导轨6调整位置，使得两个激光位移传感器3分别处于窗口5的左右两侧，通过刻度线10指示激光位移传感器3的发光点与激光计米器2的发光点之间的距离，使得两个激光位移传感器3的发光点与激光计米器2的发光点之间的距离相等。The two movable columns 4 adjust their positions along the upper and lower guide rails 6 so that the two laser displacement sensors 3 are located on the left and right sides of the window 5, respectively. The scale lines 10 indicate the distance between the light-emitting points of the laser displacement sensors 3 and the light-emitting points of the laser meter 2, so that the distances between the light-emitting points of the two laser displacement sensors 3 and the light-emitting points of the laser meter 2 are equal.
所述激光对齐器的测量原理为：激光计米器与两个激光位移传感器的发光点处于刻度线上，并向被测物体发射激光，若被测物体不平行于刻度线，则两个激光位移传感器到被测物体的间距不相等，如图3(a)所示；若被测物体平行于刻度线，则两个激光位移传感器到被测物体的间距相等，如图3(b)所示。The measurement principle of the laser aligner is as follows: the light-emitting points of the laser meter and the two laser displacement sensors are on the scale line, and lasers are emitted to the object to be measured. If the object to be measured is not parallel to the scale line, the distances between the two laser displacement sensors and the object to be measured are unequal, as shown in FIG3(a); if the object to be measured is parallel to the scale line, the distances between the two laser displacement sensors and the object to be measured are equal, as shown in FIG3(b).
可选的，步骤S1中，将激光对齐器平放在地面上，主板体1的底面正对地面，顶面正对上方功能床的背面，调整主板体1的放置方向，使得刻度线10的长度方向顺应功能床的长度方向；Optionally, in step S1, the laser aligner is placed flat on the ground, with the bottom surface of the main board body 1 facing the ground and the top surface facing the back of the functional bed above, and the placement direction of the main board body 1 is adjusted so that the length direction of the scale line 10 conforms to the length direction of the functional bed;
开启激光计米器2和两个激光位移传感器3，三条激光线射到功能床背面，数据分析装置分别得到激光计米器2、两个激光位移传感器3与功能床背面的间距；The laser meter 2 and the two laser displacement sensors 3 are turned on, and three laser lines are projected onto the back of the functional bed. The data analysis device obtains the distances between the laser meter 2, the two laser displacement sensors 3 and the back of the functional bed respectively;
调节功能床长度方向上的两端的高度，使得两个激光位移传感器3与功能床背面的间距相等，使得功能床在长度方向上与地面和主板体1平行；Adjust the heights of both ends of the functional bed in the length direction so that the distances between the two laser displacement sensors 3 and the back of the functional bed are equal, and the functional bed is parallel to the ground and the main board 1 in the length direction;
调整主板体1的放置方向，使得刻度线10的长度方向顺应功能床的宽度方向，调节功能床宽度方向上的两端的高度，再次使得两个激光位移传感器3与功能床背面的间距相等，功能床背面与床面相平行，使得功能床在宽度方向上与地面和主板体1平行。Adjust the placement direction of the main board 1 so that the length direction of the scale line 10 conforms to the width direction of the functional bed, adjust the height of the two ends in the width direction of the functional bed, and make the distance between the two laser displacement sensors 3 and the back of the functional bed equal again. The back of the functional bed is parallel to the bed surface, so that the functional bed is parallel to the ground and the main board 1 in the width direction.
可选的，所述主板体1的一个长侧面11设有两个安装凹槽，用于安装挂钩一12，使得主板体1能挂设在功能床的侧面；Optionally, one long side surface 11 of the main board body 1 is provided with two mounting grooves for mounting a hook 12, so that the main board body 1 can be hung on the side of the functional bed;
两个安装凹槽分别靠近主板体1的两个宽侧面7，安装凹槽内设有若干个螺孔；挂钩一12的外侧具有与功能床侧面框架适配的卡接部件，挂钩一12内侧的形状适配于安装凹槽的形状，挂钩一12内侧通过螺丝与安装凹槽的螺孔连接，挂钩一12安装在安装凹槽内后，挂钩一12的顶面与主板体的长侧面11齐平。The two mounting grooves are respectively close to the two wide sides 7 of the main board body 1, and a plurality of screw holes are provided in the mounting grooves; the outer side of the hook 12 has a clamping component adapted to the side frame of the functional bed, and the shape of the inner side of the hook 12 is adapted to the shape of the mounting groove. The inner side of the hook 12 is connected to the screw holes of the mounting groove by screws. After the hook 12 is installed in the mounting groove, the top surface of the hook 12 is flush with the long side 11 of the main board body.
可选的，所述激光对齐器还包括辅助调平装置，如图4所示，辅助调平装置包括托架和若干个调平螺栓15，托架包括两个竖直杆13和一个横杆14，竖直杆13的顶端设有挂钩二，挂钩二的形状适配于功能床侧面框架，使得托架挂设在功能床侧面框架；Optionally, the laser aligner further includes an auxiliary leveling device, as shown in FIG4 , the auxiliary leveling device includes a bracket and a plurality of leveling bolts 15, the bracket includes two vertical rods 13 and a horizontal rod 14, the top of the vertical rod 13 is provided with a hook 2, the shape of the hook 2 is adapted to the side frame of the functional bed, so that the bracket is hung on the side frame of the functional bed;
主板体1处于两个竖直杆13之间，横杆14处于主板体1的下方，横杆14的两端分别连接两个竖直杆13，横杆14上设有两个通孔，通孔内壁设有内螺纹，两个通孔分别靠近主板体1的两个宽侧面7；面对横杆14的主板体长侧面上设有两个凹孔，凹孔与通孔一一对应，螺栓15穿过通孔，且顶部抵住凹孔，通过螺栓15伸出横杆14的长度调节主板体1长度方向上的水平位置。The main board body 1 is between the two vertical rods 13, and the cross bar 14 is below the main board body 1. The two ends of the cross bar 14 are respectively connected to the two vertical rods 13. The cross bar 14 is provided with two through holes, and the inner walls of the through holes are provided with internal threads. The two through holes are respectively close to the two wide sides 7 of the main board body 1; two concave holes are provided on the long side of the main board body facing the cross bar 14, and the concave holes correspond to the through holes one by one. The bolt 15 passes through the through hole, and the top is against the concave hole. The horizontal position of the main board body 1 in the length direction is adjusted by the length of the bolt 15 extending out of the cross bar 14.
进一步可选的，当托架和主板体1都挂在功能床的侧面后，一个竖直杆13对应主板体1的一个上顶角的位置设置红外发射器17或激光发射器，另一个竖直杆13对应红外发射器17或激光发射器的位置设有接收器16，用于检测处于顶部的主板体长侧面11是否水平；接收器16、红外发射器17或激光发射器通讯连接外部的数据分析装置。Further optionally, when the bracket and the main board body 1 are hung on the side of the functional bed, an infrared transmitter 17 or a laser transmitter is set at a position of an upper corner of a vertical rod 13 corresponding to the main board body 1, and a receiver 16 is set at a position of another vertical rod 13 corresponding to the infrared transmitter 17 or the laser transmitter, which is used to detect whether the long side surface 11 of the main board body at the top is horizontal; the receiver 16, infrared transmitter 17 or laser transmitter are communicatively connected to an external data analysis device.
可选的，所述主板体的顶面18与两侧的宽侧面7交接处的两条竖直的棱上设有至少一道向内凹陷的辅助固定槽，两条棱相同高度上的辅助固定槽之间的连线平行于导轨6。Optionally, at least one inwardly recessed auxiliary fixing groove is provided on two vertical edges where the top surface 18 of the main board body intersects with the wide side surfaces 7 on both sides, and the connecting line between the auxiliary fixing grooves at the same height of the two edges is parallel to the guide rail 6 .
可选的，步骤S2具体包括以下步骤：Optionally, step S2 specifically includes the following steps:
(1)选择与功能床背面相垂直的功能床侧面，该功能床侧面为竖直的；(1) Select a side of the functional bed that is perpendicular to the back of the functional bed, and the side of the functional bed is vertical;
(2)将挂钩一12的外侧搭接或卡接在竖直的功能床侧面的框架上，主板体1的底面面对功能床侧面的框架，此时主板体的顶面18和底面均平行与功能床侧面；(2) Overlap or clip the outer side of the hook 12 onto the frame on the side of the vertical functional bed, with the bottom surface of the main board body 1 facing the frame on the side of the functional bed. At this time, the top surface 18 and the bottom surface of the main board body are parallel to the side of the functional bed;
(3)托架通过挂钩二挂在相同的功能床侧面的框架上，主板体1处于托架内部；(3) The bracket is hung on the frame on the side of the same functional bed through hook 2, and the main board body 1 is inside the bracket;
(4)开启竖直杆13上的红外发射器17或激光发射器、接收器16，通过数据分析装置判断接收器16是否接收到红外或激光信号，从而判断主板体1顶部的长侧面沿着功能床的床面是否水平，若不水平，通过所述螺栓15和横杆14调平主板体1的长侧面，进而调平主板体1的刻度线10；(4) Turn on the infrared transmitter 17 or the laser transmitter and the receiver 16 on the vertical rod 13, and determine whether the receiver 16 receives the infrared or laser signal through the data analysis device, so as to determine whether the long side of the top of the main body 1 is level along the bed surface of the functional bed. If not, the long side of the main body 1 is leveled through the bolts 15 and the cross bar 14, and then the scale line 10 of the main body 1 is leveled;
(5)主板体1的刻度线10调平之后，激光计米器2和两个激光位移传感器3处于同一水平线上，将功能床挂有激光对齐器的部分平移进入圆筒状的CT机架内部。(5) After the scale line 10 of the main body 1 is leveled, the laser meter 2 and the two laser displacement sensors 3 are on the same horizontal line, and the part of the functional bed with the laser aligner is translated into the cylindrical CT frame.
进一步可选的，步骤(3)中，为了使得功能床侧面的框架与对应的主板体1底面的部分完全贴合，还可以使用至少一条弹性绑带，弹性绑带沿着主板体1的长度方向横跨过主板体顶面，弹性绑带卡接在所述辅助固定槽内，弹性绑带的两端分别连接吸盘或磁铁，以便将弹性绑带固定在功能床侧面的框架上，此时主板体1底面紧贴功能床侧面的框架，保证主板体1底面(以及顶面)呈竖直。Further optionally, in step (3), in order to make the frame on the side of the functional bed completely fit with the corresponding part of the bottom surface of the main board body 1, at least one elastic strap can be used. The elastic strap spans across the top surface of the main board body 1 along the length direction of the main board body 1, and the elastic strap is clamped in the auxiliary fixing groove. The two ends of the elastic strap are respectively connected to suction cups or magnets so as to fix the elastic strap to the frame on the side of the functional bed. At this time, the bottom surface of the main board body 1 is in close contact with the frame on the side of the functional bed, ensuring that the bottom surface (and top surface) of the main board body 1 is vertical.
进一步可选的，步骤(4)中，若接收器16没有接收到光信号，则表示主板体1顶部的长侧面为倾斜的，且阻断了光的传播；观察主板体1的顶部，找到阻断光通路的位置，将靠近该阻断位置的螺栓15向下旋转，使得靠近该阻断位置的主板体1部分逐渐下移，直至接收器16接收到光信号，表示排除了阻断，停止转动螺栓15，此时，主板体1顶部的长侧面处于水平状态。Further optionally, in step (4), if the receiver 16 does not receive the light signal, it means that the long side surface of the top of the main board body 1 is inclined and blocks the propagation of light; observe the top of the main board body 1 to find the position where the light path is blocked, and rotate the bolt 15 close to the blocking position downward so that the part of the main board body 1 close to the blocking position gradually moves downward until the receiver 16 receives the light signal, indicating that the blockage is eliminated, and stop rotating the bolt 15. At this time, the long side surface of the top of the main board body 1 is in a horizontal state.
进一步可选的，步骤(4)中，若接收器16接收到光信号，则可能是主板体1顶部的长侧面处于水平状态，也可能是该长侧面倾斜但对齐红外发射器17或激光发射器的顶角位置较高；Further optionally, in step (4), if the receiver 16 receives an optical signal, it is possible that the long side surface at the top of the main board body 1 is in a horizontal state, or it is possible that the long side surface is tilted but aligned with the top angle position of the infrared transmitter 17 or the laser transmitter is higher;
此时，将远离红外发射器17或激光发射器的螺栓15向上旋转，使得远离红外发射器17或激光发射器的顶角逐渐上升，若接收器16立即无法接收光信号，则表示调整之前主板体1已经水平，将远离红外发射器17或激光发射器的螺栓15向下旋转，使得接收器16重新接收到光信号，即完成调平；若接收器16一直能收到光信号，则表示主板体1倾斜，该螺栓15继续向上旋转，直至接收器16无法接收光信号，再将该螺栓15向下旋转，直至接收器16再次接收到光信号，停止转动螺栓15，此时，主板体1顶部的长侧面处于水平状态。At this time, the bolt 15 away from the infrared transmitter 17 or the laser transmitter is rotated upward so that the top angle away from the infrared transmitter 17 or the laser transmitter gradually rises. If the receiver 16 cannot receive the light signal immediately, it means that the main board body 1 was already horizontal before the adjustment, and the bolt 15 away from the infrared transmitter 17 or the laser transmitter is rotated downward so that the receiver 16 receives the light signal again, and the leveling is completed; if the receiver 16 can always receive the light signal, it means that the main board body 1 is tilted, and the bolt 15 continues to rotate upward until the receiver 16 cannot receive the light signal, and then the bolt 15 is rotated downward until the receiver 16 receives the light signal again, and the bolt 15 is stopped. At this time, the long side of the top of the main board body 1 is in a horizontal state.
可选的，步骤S3具体包括以下步骤：Optionally, step S3 specifically includes the following steps:
(6)开启激光计米器2和两个激光位移传感器3，三条激光线射到CT机架的内壁上，数据分析装置分别得到激光计米器2、两个激光位移传感器3与CT机架内壁的间距；(6) Turn on the laser meter 2 and the two laser displacement sensors 3, and three laser lines are projected onto the inner wall of the CT gantry. The data analysis device obtains the distances between the laser meter 2, the two laser displacement sensors 3 and the inner wall of the CT gantry respectively;
(7)调整CT机架的位置，使得两个激光位移传感器3与CT机架内壁的间距相等，则被激光照射到的CT机架内壁平行于主板体顶面、平行于功能床的中心线，从而CT机架的中心线平行于功能床的中心线，如图5所示。(7) The position of the CT gantry is adjusted so that the distances between the two laser displacement sensors 3 and the inner wall of the CT gantry are equal. Then, the inner wall of the CT gantry irradiated by the laser is parallel to the top surface of the main body and the center line of the functional bed, so that the center line of the CT gantry is parallel to the center line of the functional bed, as shown in FIG5 .
实施步骤S4之前，拆除挂钩一12和辅助调平装置。Before implementing step S4, the hook 12 and the auxiliary leveling device are removed.
可选的，步骤S4具体包括以下步骤：Optionally, step S4 specifically includes the following steps:
(8)将激光对齐器平放在功能床的床面上，通过测量功能床，将刻度线10的零点对准功能床床面的中心线；(8) Place the laser aligner flat on the bed surface of the functional bed, and align the zero point of the scale line 10 with the center line of the bed surface of the functional bed by measuring the functional bed;
(9)开启激光计米器2和两个激光位移传感器3，三条激光线射到CT机架顶部的内壁上，数据分析装置分别得到激光计米器2、两个激光位移传感器3与CT机架顶部内壁的间距；(9) Turn on the laser meter 2 and the two laser displacement sensors 3, and three laser lines are projected onto the inner wall of the top of the CT gantry. The data analysis device obtains the distances between the laser meter 2, the two laser displacement sensors 3 and the inner wall of the top of the CT gantry respectively;
(10)在水平方向上左右调节CT机架的位置，使得两个激光位移传感器3与CT机架顶部内壁的间距相等，则功能床的中心线与CT机架中心线处于同一竖直面上，如图6所示。(10) The position of the CT gantry is adjusted left and right in the horizontal direction so that the distances between the two laser displacement sensors 3 and the inner wall of the top of the CT gantry are equal, and the center line of the functional bed and the center line of the CT gantry are in the same vertical plane, as shown in FIG6 .
进一步可选的，步骤(9)中，还可以用弹性绑带固定主板体1的位置，弹性绑带沿着主板体1的长度方向横跨过主板体顶面，弹性绑带卡接在辅助固定槽内，通过弹性绑带将主板体1底面紧贴功能床床面，保证主板体1底面(以及顶面)呈水平。Further optionally, in step (9), the position of the main board body 1 can be fixed by an elastic strap, the elastic strap spans across the top surface of the main board body along the length direction of the main board body 1, the elastic strap is clipped into the auxiliary fixing groove, and the bottom surface of the main board body 1 is pressed against the functional bed surface by the elastic strap to ensure that the bottom surface (and top surface) of the main board body 1 is horizontal.
| Application Number | Priority Date | Filing Date | Title |
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| CN202410504486.6ACN118303906A (en) | 2024-04-25 | 2024-04-25 | Center line alignment method for CT (computed tomography) machine frame and functional table |
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| CN202410504486.6ACN118303906A (en) | 2024-04-25 | 2024-04-25 | Center line alignment method for CT (computed tomography) machine frame and functional table |
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| CN119896825A (en)* | 2025-04-01 | 2025-04-29 | 四川省肿瘤医院 | A method and device for calibrating a radiotherapy laser positioning lamp |
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| CN119896825A (en)* | 2025-04-01 | 2025-04-29 | 四川省肿瘤医院 | A method and device for calibrating a radiotherapy laser positioning lamp |
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