CN102954789A - Double-laser-beam plane positioning system and method based on image interpretation - Google Patents

Abstract

Translated fromChinese

本发明涉及一种基于图像判读的双激光束平面定位系统及其方法，该基于图像判读的双激光束平面定位系统包括第一转台、第二转台、反射棱镜以及图像采集及处理单元；反射棱镜置于第一转台和第二转台之间；图像采集及处理单元设置于经反射棱镜反射后的光路上。本发明提供了一种光束定位准确、系统小巧轻便以及成本低廉的基于图像判读的双激光束平面定位系统及其方法。

The invention relates to a dual laser beam plane positioning system based on image interpretation and a method thereof. The image interpretation based dual laser beam plane positioning system includes a first turntable, a second turntable, a reflective prism, and an image acquisition and processing unit; the reflective prism It is placed between the first turntable and the second turntable; the image acquisition and processing unit is set on the optical path reflected by the reflective prism. The invention provides an image-interpreting-based dual-laser beam plane positioning system and method thereof with accurate beam positioning, small and portable system, and low cost.

Description

Translated fromChinese

基于图像判读的双激光束平面定位系统及其方法Image Interpretation-Based Dual Laser Beam Plane Positioning System and Its Method

技术领域technical field

本发明属光学领域，涉及一种激光的定位系统，尤其涉及一种基于图像判读的双激光束平面定位系统及其方法。The invention belongs to the field of optics, and relates to a laser positioning system, in particular to an image interpretation-based dual laser beam plane positioning system and a method thereof.

背景技术Background technique

在科学研究的过程中，激光器的应用越来越广泛。常常需要使激光指向某一特定角度，有时还需要使双激光光束成一定的夹角。但是目前没有一个很好的手段，能够给出激光光束的指向，或者双光束的夹角。In the process of scientific research, lasers are used more and more widely. Often it is necessary to point the laser at a specific angle, and sometimes it is necessary to have the two laser beams at a certain angle. But there is currently no good method that can give the direction of the laser beam, or the angle between the two beams.

发明内容Contents of the invention

为了解决背景技术中存在的上述技术问题，本发明提供了一种光束定位准确、系统小巧轻便以及成本低廉的基于图像判读的双激光束平面定位系统及其方法。In order to solve the above-mentioned technical problems in the background technology, the present invention provides an image interpretation-based dual-laser beam plane positioning system and its method with accurate beam positioning, compact and portable system, and low cost.

本发明的技术解决方案是：本发明提供了一种基于图像判读的双激光束平面定位系统，其特殊之处在于：所述基于图像判读的双激光束平面定位系统包括第一转台、第二转台、反射棱镜以及图像采集及处理单元；所述反射棱镜置于第一转台和第二转台之间；所述图像采集及处理单元设置于经反射棱镜反射后的光路上。The technical solution of the present invention is: the present invention provides a dual laser beam plane positioning system based on image interpretation, which is special in that: said dual laser beam plane positioning system based on image interpretation includes a first turntable, a second A turntable, a reflective prism, and an image acquisition and processing unit; the reflective prism is placed between the first turntable and the second turntable; the image acquisition and processing unit is arranged on the optical path reflected by the reflective prism.

上述图像采集及处理单元包括图像采集单元以及图像采集单元连接的图像处理单元。The above image acquisition and processing unit includes an image acquisition unit and an image processing unit connected to the image acquisition unit.

上述图像采集单元是摄像机或CCD。The above-mentioned image acquisition unit is a camera or a CCD.

上述图像处理单元是含有图像修补、比对和/或判读功能的计算机。The above-mentioned image processing unit is a computer with functions of image repair, comparison and/or interpretation.

上述基于图像判读的双激光束平面定位系统还包括转台角度显示单元；所述转台角度显示单元分别和第一转台和第二转台相连。The above-mentioned dual laser beam plane positioning system based on image interpretation also includes a turntable angle display unit; the turntable angle display unit is connected to the first turntable and the second turntable respectively.

上述第一转台和第二转台均是二维转台或三维转台。Both the above-mentioned first turntable and the second turntable are two-dimensional turntables or three-dimensional turntables.

上述反射棱镜是反射直角棱镜。The reflective prisms described above are rectangular reflective prisms.

一种基于图像判读的双激光束平面定位方法，其特殊之处在于：所述基于图像判读的双激光束平面定位方法包括以下步骤：A dual laser beam plane positioning method based on image interpretation, which is special in that: said image interpretation based dual laser beam plane positioning method comprises the following steps:

1)将双激光束分别初步固定在不同转台上；1) Preliminarily fix the dual laser beams on different turntables;

2)使已经初步固定的双激光束分别经过同一个反射棱镜，并分别形成不同激光束的反射光斑；2) Make the preliminarily fixed dual laser beams pass through the same reflective prism respectively, and form reflected spots of different laser beams respectively;

3)判断双激光束的反射光斑是否重合，若重合，则双激光束是共线对准；若不重合，则根据光斑的偏移位置直接读取双激光束之间的夹角。3) Determine whether the reflected spots of the two laser beams are coincident. If they coincide, the two laser beams are collinearly aligned; if not, the angle between the two laser beams is directly read according to the offset position of the spots.

上述步骤3)中若双激光束的反射光斑是重合的，则所述基于图像判读的双激光束平面定位方法还包括：If the reflection spots of the double laser beams are coincident in the above-mentioned step 3), then the method for positioning the plane of the double laser beams based on image interpretation also includes:

4)以步骤1)中转台位置为参考零角度，转动任一转台，使双激光束含有所转动转台角度的双激光束夹角。4) Taking the position of the turntable in step 1) as the reference zero angle, turn any turntable so that the double laser beams include the angle between the two laser beams of the turned turntable angle.

本发明的优点是：本发明提供了一种基于图像判读的双激光束平面定位系统及其方法，该定位系统将视频图像判读技术和双轴精密转动技术结合，可以精确给出激光束在平面内的指向，或者给出双光束的夹角关系，使用光束成像系统及图像处理技术对光束平行性进行判断；利用双轴精密转台为激光光束提供高精度角度指向，形成指定的光束夹角或光束指向；根据不同激光光束成像特点，建立最佳的模型，通过边缘拟合得到光束中心位置；利用直角棱镜作为光束偏转器件，使双光束成像在同一光学系统中，具有光束定位准确、系统小巧轻便以及成本低廉等的优点。The advantages of the present invention are: the present invention provides a dual laser beam plane positioning system and its method based on image interpretation. Inner pointing, or given the angle relationship between the two beams, use the beam imaging system and image processing technology to judge the beam parallelism; use the two-axis precision turntable to provide high-precision angle pointing for the laser beam to form a specified beam angle or Beam pointing; according to the imaging characteristics of different laser beams, the best model is established, and the center position of the beam is obtained through edge fitting; using a rectangular prism as a beam deflection device, the dual beams are imaged in the same optical system, with accurate beam positioning and compact system The advantages of lightness and low cost.

附图说明Description of drawings

图1是本发明所提供的定位系统的结构示意图；Fig. 1 is a schematic structural diagram of a positioning system provided by the present invention;

其中：in:

1-转台角度显示单元；2-第一转台；3-第二转台；4-反射棱镜；5-图像采集单元；6-图像处理单元；7-激光器。1-turntable angle display unit; 2-first turntable; 3-second turntable; 4-reflecting prism; 5-image acquisition unit; 6-image processing unit; 7-laser.

具体实施方式Detailed ways

参见图1，本发明提供了一种基于图像判读的双激光束平面定位系统，该系统包括第一转台2、第二转台3、反射棱镜4以及图像采集及处理单元；反射棱镜4置于第一转台2和第二转台3之间；图像采集及处理单元设置于经反射棱镜4反射后的光路上，图像采集及处理单元包括图像采集单元5以及图像采集单元5连接的图像处理单元6，图像采集单元5可以是例如摄像机或CCD等能捕捉图像的器材都是可以的。图像处理单元6可以是含有图像修补、比对和/或判读功能的计算机。Referring to Fig. 1, the present invention provides a kind of dual laser beam plane positioning system based on image interpretation, and this system comprisesfirst turntable 2,second turntable 3,reflection prism 4 and image acquisition and processing unit;Reflection prism 4 is placed in the first turntable Between aturntable 2 and thesecond turntable 3; the image acquisition and processing unit is arranged on the light path reflected by thereflective prism 4, the image acquisition and processing unit includes animage acquisition unit 5 and animage processing unit 6 connected to theimage acquisition unit 5, Theimage acquisition unit 5 may be any device capable of capturing images such as a video camera or a CCD. Theimage processing unit 6 may be a computer with functions of image repair, comparison and/or interpretation.

该基于图像判读的双激光束平面定位系统还包括转台角度显示单元1；转台角度显示单元1分别和第一转台2和第二转台3相连。The dual laser beam plane positioning system based on image interpretation also includes a turntableangle display unit 1; the turntableangle display unit 1 is connected to thefirst turntable 2 and thesecond turntable 3 respectively.

第一转台2和第二转台3均可以是二维精密转台或三维精密转台。反射棱镜4可以是反射直角棱镜或其他具有反射功能的反射体都是可以的，例如双面镀有高反射膜的平面镜等。Both thefirst turntable 2 and thesecond turntable 3 can be two-dimensional precision turntables or three-dimensional precision turntables. Thereflective prism 4 may be a reflective right-angle prism or other reflectors with reflective functions, such as flat mirrors coated with high reflective films on both sides.

本发明在提供定位系统的同时，还提供了一种基于图像判读的双激光束平面定位方法，该方法包括以下步骤：While providing the positioning system, the present invention also provides a dual laser beam plane positioning method based on image interpretation, the method comprising the following steps:

1)将双激光束分别初步固定在不同转台上；1) Preliminarily fix the dual laser beams on different turntables;

2)使已经初步固定的双激光束分别经过同一个反射棱镜，并分别形成不同激光束的反射光斑；2) Make the preliminarily fixed dual laser beams pass through the same reflective prism respectively, and form reflected spots of different laser beams respectively;

3)判断双激光束的反射光斑是否重合，若重合，则双激光束是共线对准；若不重合，则根据光斑的偏移位置直接读取双激光束之间的夹角。3) Determine whether the reflected spots of the two laser beams are coincident. If they coincide, the two laser beams are collinearly aligned; if not, the angle between the two laser beams is directly read according to the offset position of the spots.

当步骤3)中若双激光束的反射光斑是重合的，则该定位方法还包括：When step 3) if the reflected light spots of the double laser beams are coincident, then the positioning method also includes:

4)以步骤1)中转台位置为参考零角度，转动任一转台，使双激光束含有所转动转台角度的双激光束夹角。4) Taking the position of the turntable in step 1) as the reference zero angle, turn any turntable so that the double laser beams include the angle between the two laser beams of the turned turntable angle.

本发明在激光多普勒测速系统中的工作原理是：The working principle of the present invention in the laser Doppler velocimetry system is:

本发明在工作时，双激光器7分别固定在第一转台2和第二转台3上，光束经过反射棱镜4反射后进行成像系统，计算机采集光束图像，图像判读软件对两个光束图像进行处理，得到两个光束之间的夹角关系。当两个光束经反射棱镜4反射后平行时，两个光束在图像中的位置完全重合，此时，认为两个激光器7发射的光束是共线对准的。以此时的转台位置为参考零角度，转动双轴转台，可以得到任意双激光光束夹角。光束的夹角是可以通过转台角度计算得到。When the present invention is working, thedouble lasers 7 are respectively fixed on thefirst turntable 2 and thesecond turntable 3, and the light beam is reflected by thereflective prism 4 to carry out the imaging system, the computer collects the light beam image, and the image interpretation software processes the two light beam images, Obtain the angle relationship between the two beams. When the two light beams are parallel after being reflected by thereflective prism 4, the positions of the two light beams in the image coincide completely. At this time, it is considered that the light beams emitted by the twolasers 7 are collinearly aligned. Taking the position of the turntable at this time as the reference zero angle, and turning the two-axis turntable, any angle between the two laser beams can be obtained. The included angle of the beam can be calculated from the angle of the turntable.

Claims (9)

1. double laser beam plane positioning system based on image interpretation, it is characterized in that: described double laser beam plane positioning system based on image interpretation comprises the first turntable, the second turntable, reflecting prism and image acquisition and processing unit; Described reflecting prism places between the first turntable and the second turntable; Described image acquisition and processing unit are arranged on the light path after the reflecting prism reflection.

2. the double laser beam plane positioning system based on image interpretation according to claim 1 is characterized in that: described image acquisition and processing unit comprise the graphics processing unit that image acquisition units and image acquisition units connect.

3. the double laser beam plane positioning system based on image interpretation according to claim 2, it is characterized in that: described image acquisition units is video camera or CCD.

4. the double laser beam plane positioning system based on image interpretation according to claim 3, it is characterized in that: described graphics processing unit is the computing machine that contains image mending, comparison and/or interpretation function.

5. the double laser beam plane positioning system based on image interpretation according to claim 1, it is characterized in that: described double laser beam plane positioning system based on image interpretation also comprises turntable angle display unit; Described turntable angle display unit links to each other with the second turntable with the first turntable respectively.

6. according to claim 1 and 2 or 3 or 4 or 5 described double laser beam plane positioning systems based on image interpretation, it is characterized in that: described the first turntable and the second turntable all are two-dimentional turntable or three-dimensional turntable.

7. the double laser beam plane positioning system based on image interpretation according to claim 6, it is characterized in that: described reflecting prism is reflection right-angle prism.

8. double laser beam plain location method based on image interpretation, it is characterized in that: described double laser beam plain location method based on image interpretation may further comprise the steps:

1) tentatively be fixed on respectively double laser beam on the different turntables;

2) make tentatively fixing double laser beam pass through respectively same reflecting prism, and form respectively the flare of different laser beam;

Whether the flare of 3) judging double laser beam overlaps, if overlap, then double laser beam is that conllinear is aimed at; If do not overlap, then directly read angle between the double laser beam according to the deviation post of hot spot.

9. the double laser beam plain location method based on image interpretation according to claim 1 is characterized in that: described step 3) if in the flare of double laser beam overlap, then described double laser beam plain location method based on image interpretation also comprises:

4) take step 1) the intermediate station position is as with reference to zero degree, rotates arbitrary turntable, makes double laser beam contain the to some extent double laser beam angle of rotating table angle.

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