技术领域technical field
本发明涉及电子领域，特别是指一种用于多屏幕的自动寻踪激光笔系统。The invention relates to the electronic field, in particular to an automatic tracking laser pointer system for multiple screens.
背景技术Background technique
目前，投影仪是现代多媒体会议室和多媒体教室中不可缺少的视频输出设备,它在多媒体领域中的作用是把图像放大以供人们欣赏,是普通CRT及液晶电视所无法比拟的,它可以把传统的视频信号及电脑的VGA信号通过转接口后投射到幕布上供人们欣赏和使用。在今天追求高效率、快节奏的现代办公中，投影仪作为新型办公设备用户可以随处见到它的身影。投影机不但可以应用于临时会议、技术讲座、网络中心、指挥监控中心，还可以与计算机、工作站等进行连接，或接驳录像机、电视机、影碟机以及实物展台等，可以说它是一种应用十分广泛的大屏幕影像设备。At present, the projector is an indispensable video output device in modern multimedia conference rooms and multimedia classrooms. Its role in the multimedia field is to enlarge the image for people to appreciate, which is incomparable to ordinary CRT and LCD TVs. The traditional video signal and the VGA signal of the computer are projected onto the screen through the interface for people to appreciate and use. In today's pursuit of high efficiency and fast-paced modern office, projectors can be seen everywhere as a new type of office equipment. The projector can not only be used in temporary meetings, technical lectures, network centers, command and monitoring centers, but also can be connected with computers, workstations, etc., or connected with video recorders, TV sets, DVD players, and physical exhibition stands, etc. It can be said that it is a kind of Widely used large-screen video equipment.
现有的投影仪无线激光笔是专门为计算机及多媒体投影机设计的一款新型专利电子产品在欧美等发达国家的使用已经很普遍了；它除了具备传统激光教鞭的映射功能外，还可以通过简单地按动激光笔上、下翻页按钮，以无线方式直接远程遥控电脑或多媒体投影设备实现电子文档的自由翻页和随意演示。无线激光笔可以把演讲者从电脑旁边彻底解放出来使用者不必一直守在计算机旁边。当演讲者在电子教学、演示文稿和报告演讲的时候，对于重点内容需要备注说明时，只需用手轻轻一按红色激光点就可以映射在您需要强调的文档内容屏幕上，可以省去演讲者每次讲解重点内容时与听众“指手划脚”或走到投影屏幕前与其“亲密接触”的辛苦，同时演讲者也只需轻轻指点相关功能按钮就可以将电子文稿翻向您要讲演的页面上下左右360度无拘无束。无论您在教室、演讲厅的哪个角落，还是在会议室的后面和听讲人作现场互动，只需演讲者轻轻一按无线翻页激光笔上下翻页键，演讲者想要的画面就会自动出现在屏幕上。The existing projector wireless laser pointer is a new type of patented electronic product specially designed for computers and multimedia projectors. It has been widely used in developed countries such as Europe and the United States; Simply press the up and down page-turning buttons of the laser pointer, and directly and remotely control the computer or multimedia projection equipment in a wireless manner to realize free page-turning and free presentation of electronic documents. The wireless laser pointer can completely liberate the speaker from the side of the computer, and the user does not have to keep guarding the side of the computer all the time. When the speaker needs to make notes on the key content during e-learning, presentations and reports, he only needs to press the red laser dot lightly with his hand to map it on the screen of the document content you need to emphasize, which can save the speech It saves the hard work of "pointing fingers" with the audience or going to the projection screen to "intimate contact" with the audience every time they explain the key content. At the same time, the speaker can turn the electronic document to the one you want by simply pointing to the relevant function buttons. The page of the lecture can be 360 degrees up, down, left, and right. No matter where you are in the classroom, the corner of the lecture hall, or the back of the conference room, you only need to press the wireless page-turning laser pointer to turn the page up and down, and the picture that the speaker wants will appear automatically appear on the screen.
随着教学和会议规模的不断扩大，普通的单个幕布投影满足不了人类发展的需求，在需要有前后左右多个投影屏幕的大型教学或会议室内，演讲人持有手动激光笔虽然能控制投影电子文档的自由翻页，但是对于重点内容需要备注说明时，就需要拿着手动激光笔投射到主屏幕上(一般是正前方的屏幕为主屏幕)产生亮斑重点标示出，而其他没有激光笔投射到的屏幕，则不会产生光斑。对于需要看后方和左右屏幕的听演讲人，必须要扭头回主屏幕寻找手动激光笔所投射到主屏幕上的亮斑，才能知道演讲者讲到哪里，甚至有时候听演讲者找好久都不知道亮斑在哪里，这样听演讲的人精力都放在寻找激光笔投射在主屏幕的亮斑上，导致要么跟不上演讲者的思维，要么错过演讲者指出的重点；最终的结果就是不知演讲者所云。这就是现在很普遍的现象，台上的演讲者讲的天花乱坠，台下听演讲的人不知所云。With the continuous expansion of the scale of teaching and conferences, ordinary single-screen projection cannot meet the needs of human development. In large-scale teaching or conference rooms that require multiple projection screens, front, rear, left, and right, although the speaker holds a manual laser pointer, he can control the projection electronics. Free page turning of the document, but when the key content needs to be remarked, it is necessary to hold a manual laser pointer and project it on the main screen (usually the screen directly in front of the main screen) to produce bright spots and highlight the key points, while others do not have laser pointer projection To the screen, there will be no flare. For speakers who need to look at the rear and left and right screens, they have to turn their heads back to the main screen to look for the bright spot projected by the manual laser pointer on the main screen, so as to know where the speaker is talking, and sometimes the speaker can’t find it for a long time. Know where the bright spots are, so that people who listen to the speech are focused on finding the bright spots projected by the laser pointer on the main screen, resulting in either being unable to keep up with the speaker's thinking, or missing the key points pointed out by the speaker; the end result is that they do not know What the speaker said. This is a very common phenomenon nowadays. The speakers on the stage are talking about hype, but the people listening to the speech under the stage don't know what to say.
发明内容Contents of the invention
有鉴于此，本发明的目的在于提出一种用于多屏幕的自动寻踪激光笔系统，能够解决现有技术中激光笔投影到屏幕上，只有该屏幕有光斑显示，其他屏幕没有的缺陷。In view of this, the purpose of the present invention is to propose an automatic tracking laser pointer system for multiple screens, which can solve the defect in the prior art that only this screen has light spots when the laser pointer is projected on the screen, and other screens do not.
基于上述目的本发明提供的用于多屏幕的自动寻踪激光笔系统，包括手动激光笔、至少一个自动激光笔、主屏幕、至少一个屏幕、至少两个投影仪、探测仪、MCU控制处理器和至少一个步进电机；其中，主屏幕、屏幕总共的数量和投影仪的数量相同，步进电机和自动激光笔的数量相同；Based on the above-mentioned purpose, the automatic tracking laser pointer system for multiple screens provided by the present invention includes a manual laser pointer, at least one automatic laser pointer, a main screen, at least one screen, at least two projectors, a detector, an MCU control processor and at least one stepping motor; wherein, the total number of main screens and screens is the same as the number of projectors, and the number of stepping motors and automatic laser pointers is the same;
其中，在所述主屏幕侧设置有所述手动激光笔、所述投影仪和所述探测仪，所述手动激光笔用于投影到所述主屏幕上亮斑；并且，所述探测仪探测主屏幕上的亮斑，所述探测仪通过无线或有线网络与MCU控制处理器连接；Wherein, the manual laser pointer, the projector and the detector are arranged on the side of the main screen, and the manual laser pointer is used to project bright spots on the main screen; and, the detector detects Bright spots on the main screen, the detector is connected to the MCU control processor through a wireless or wired network;
在所述屏幕侧设置有所述投影仪、所述步进电机和所述自动激光笔，所述步进电机通过无线或有线网络与所述MCU控制处理器连接；而且，所述步进电机与所述自动激光笔相连，能够控制所述自动激光笔转动。Described projector, described stepper motor and described automatic laser pointer are arranged on described screen side, and described stepper motor is connected with described MCU control processor by wireless or wired network; And, described stepper motor It is connected with the automatic laser pointer and can control the rotation of the automatic laser pointer.
可选地，所述步进电机和所述自动激光笔集成在所述的投影仪上。Optionally, the stepper motor and the automatic laser pointer are integrated on the projector.
可选地，所述探测仪集成在所述投影仪上。Optionally, the detector is integrated on the projector.
进一步地，所述的探测仪为四象限探测器，四象限探测器探测到所述主屏幕上光斑的坐标，四象限探测器与MCU控制处理器通过网络连接，将位置坐标传送给该MCU控制处理器。Further, the detector is a four-quadrant detector, the four-quadrant detector detects the coordinates of the light spot on the main screen, the four-quadrant detector is connected to the MCU control processor through a network, and the position coordinates are transmitted to the MCU control processor.
可选地，所述的探测仪或者是直接在所述主屏幕的边缘上安装传感器和接收器，以所述主屏幕的左下角为二维坐标的原点，所述主屏幕的底部横轴为二维坐标的X轴，所述主屏幕的左侧竖轴为二维坐标的Y轴，在X轴和Y轴上按一定间距紧密排列传感器，在X轴和Y轴的对应边上按同样的间距紧密排列与传感器对应的接收器。Optionally, the detector may directly install sensors and receivers on the edge of the main screen, with the lower left corner of the main screen as the origin of the two-dimensional coordinates, and the horizontal axis at the bottom of the main screen is The X-axis of the two-dimensional coordinates, the left vertical axis of the main screen is the Y-axis of the two-dimensional coordinates, the sensors are closely arranged at a certain distance on the X-axis and the Y-axis, and the same is pressed on the corresponding sides of the X-axis and the Y-axis The spacing closely aligns the receivers corresponding to the sensors.
可选地，所述MCU控制处理器是将所述探测仪采集到的亮斑坐标经过运算处理，转换成自动激光笔转动的角度数据，转换时采用最小二乘法；Optionally, the MCU control processor converts the bright spot coordinates collected by the detector into angle data of automatic laser pointer rotation through calculation processing, and adopts the least square method during conversion;
所述MCU控制处理器将幕布平均分为四个象限，以激光笔光斑为一个像素单位，用MCU控制处理器中四个存储芯片分别进行四个象限的存储rom；幕布上每个象限上的每一个像素对应相应象限的存储芯片中的一个事先存储好的电压值或者电流值，当光斑照射在幕布上时，MCU控制处理器中的CPU芯片就根据光斑位置所在的象限进行查存储rom，将得到电压值或者电流值送至MCU控制处理器的处理单元进行数字信号处理，最后将处理得到的电脉冲信号送至所述的步进电机。The MCU control processor divides the curtain into four quadrants on average, and takes the laser pointer spot as a pixel unit, and uses four memory chips in the MCU control processor to store four quadrants respectively; Each pixel corresponds to a pre-stored voltage or current value in the memory chip of the corresponding quadrant. When the light spot is irradiated on the screen, the CPU chip in the MCU control processor will search and store the rom according to the quadrant where the light spot is located. Send the obtained voltage value or current value to the processing unit of the MCU control processor for digital signal processing, and finally send the processed electric pulse signal to the stepping motor.
进一步地，所述采用最小二乘法时，要将数据点处的偏差为零，就采用求偏差平方和，即最小。Further, when using the least squares method, the data points Deviation at is zero, the sum of squared deviations is used, that is minimum.
进一步地，所述的主屏幕和至少一个屏幕所采用的屏幕尺寸采用一致的，或者采用不一致的尺寸屏幕；当采用一致的，则主屏幕上的光斑直接通过自动激光笔投影到至少一个屏幕上；当采用不一致的屏幕尺寸时，用比例尺根据屏幕的大小来调节所述步进电机的步距角和转向。Further, the screen size adopted by the main screen and at least one screen adopts the same or inconsistent size screen; when the same size is adopted, the light spot on the main screen is directly projected onto the at least one screen through the automatic laser pointer ; When adopting inconsistent screen sizes, use a scale to adjust the step angle and steering of the stepper motor according to the size of the screen.
进一步地，所述用于多屏幕的自动寻踪激光笔系统实施包括：Further, the implementation of the automatic tracking laser pointer system for multiple screens includes:
步骤一，手动激光笔将光斑投影在主屏幕上；Step 1, the manual laser pointer projects the spot on the main screen;
步骤二，通过探测仪对主屏幕上的光斑进行实时采集；Step 2, real-time acquisition of the light spots on the main screen through the detector;
步骤三，探测仪将采集的光斑坐标数据传送给MCU控制处理器，该MCU控制处理器经过运算处理，将光斑坐标数据转换成步进电机可识别的控制数据，再传给步进电机；Step 3, the detector transmits the collected light spot coordinate data to the MCU control processor, and the MCU control processor converts the light spot coordinate data into control data recognizable by the stepping motor through calculation processing, and then transmits it to the stepping motor;
步骤四，步进电机控制自动激光笔转动，实现自动激光笔对屏幕的照射。Step 4, the stepper motor controls the rotation of the automatic laser pointer to realize the irradiation of the automatic laser pointer on the screen.
进一步地，所述自动激光笔每转动完一次，就会进行初始化，恢复到初始位置上。Further, each time the automatic laser pointer is rotated once, it will be initialized and returned to the original position.
从上面所述可以看出，本发明提供的用于多屏幕的自动寻踪激光笔系统，通过在所述主屏幕侧设置有所述手动激光笔、所述投影仪和所述探测仪，所述手动激光笔用于投影到所述主屏幕上亮斑；并且，所述探测仪探测主屏幕上的亮斑，所述探测仪通过无线或有线网络与MCU控制处理器连接；在所述屏幕侧设置有所述投影仪、所述步进电机和所述自动激光笔，所述步进电机通过无线或有线网络与所述MCU控制处理器连接；而且，所述步进电机与所述自动激光笔相连，能够控制所述自动激光笔转动。从而，所述用于多屏幕的自动寻踪激光笔系统能够实现多个屏幕可以同时显示同一个激光笔的投影情况。As can be seen from the above description, the automatic tracking laser pointer system for multiple screens provided by the present invention is provided with the manual laser pointer, the projector and the detector on the side of the main screen. The manual laser pointer is used to project the bright spot on the main screen; and the detector detects the bright spot on the main screen, and the detector is connected with the MCU control processor through a wireless or wired network; Side is provided with described projector, described stepping motor and described automatic laser pointer, and described stepping motor is connected with described MCU control processor by wireless or wired network; And, described stepping motor and described automatic The laser pointer is connected and can control the rotation of the automatic laser pointer. Therefore, the automatic tracking laser pointer system for multiple screens can realize that multiple screens can simultaneously display the projection of the same laser pointer.
附图说明Description of drawings
图1为本发明实施例中用于多屏幕的自动寻踪激光笔系统的结构示意图；FIG. 1 is a schematic structural diagram of an automatic tracking laser pointer system for multiple screens in an embodiment of the present invention;
图2为本发明实施例中用于多屏幕的自动寻踪激光笔的方法流程示意图。FIG. 2 is a schematic flowchart of a method for automatically tracking a laser pointer with multiple screens in an embodiment of the present invention.
具体实施方式Detailed ways
为使本发明的目的、技术方案和优点更加清楚明白，以下结合具体实施例，并参照附图，对本发明进一步详细说明。In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
在本发明的一个实施例中，如图1所示，为本发明实施例中用于多屏幕的自动寻踪激光笔系统的结构示意图，所述用于多屏幕的自动寻踪激光笔系统包括手动激光笔1、至少一个自动激光笔2、主屏幕7、至少一个屏幕8、至少两个投影仪3、探测仪4、MCU控制处理器5和至少一个步进电机6。其中，屏幕的数量(包括主屏幕和屏幕)和投影仪的数量必须相同，步进电机和自动激光笔的数量相同。In one embodiment of the present invention, as shown in Figure 1, it is a schematic structural diagram of an automatic tracking laser pointer system for multiple screens in an embodiment of the present invention, and the automatic tracking laser pointer system for multiple screens includes Manual laser pointer 1, at least one automatic laser pointer 2, main screen 7, at least one screen 8, at least two projectors 3, detector 4, MCU control processor 5 and at least one stepper motor 6. Among them, the number of screens (including the main screen and screen) and the number of projectors must be the same, and the number of stepper motors and automatic laser pointers must be the same.
在主屏幕7侧设置有手动激光笔1、投影仪3和探测仪4，手动激光笔1用于投影到主屏幕7上亮斑。并且，探测仪4探测主屏幕7上的亮斑，投影仪3可以投影所需内容在主屏幕7上。同时，探测仪4通过无线或有线网络与MCU控制处理器5连接。A manual laser pointer 1 , a projector 3 and a detector 4 are arranged on the side of the main screen 7 , and the manual laser pointer 1 is used to project bright spots on the main screen 7 . Moreover, the detector 4 detects bright spots on the main screen 7 , and the projector 3 can project required content on the main screen 7 . At the same time, the detector 4 is connected with the MCU control processor 5 through a wireless or wired network.
在屏幕8侧设置有投影仪3、步进电机6和自动激光笔2，较佳地，步进电机6和自动激光笔2可以集成在所述的投影仪3上。并且，步进电机6通过无线或有线网络与MCU控制处理器5连接。而且，步进电机6与自动激光笔2相连，能够控制自动激光笔2转动。同时，该投影仪3可以投影所需内容在屏幕8上，该内容与主屏幕7上投影的内容一致。需要说明的是，在本发明中可以设置至少一组上述的屏幕8侧，在此只以一组上述屏幕8侧进行了说明。A projector 3 , a stepping motor 6 and an automatic laser pointer 2 are arranged on the side of the screen 8 , preferably, the stepping motor 6 and the automatic laser pointer 2 can be integrated on the projector 3 . Moreover, the stepping motor 6 is connected with the MCU control processor 5 through a wireless or wired network. Moreover, the stepping motor 6 is connected with the automatic laser pointer 2 and can control the rotation of the automatic laser pointer 2 . At the same time, the projector 3 can project required content on the screen 8 , which is consistent with the content projected on the main screen 7 . It should be noted that at least one set of the above-mentioned screen 8 sides can be provided in the present invention, and only one set of the above-mentioned screen 8 sides is used for illustration.
在实施例中，所述用于多屏幕的自动寻踪激光笔系统工作时，主屏幕7侧和屏幕8侧的投影仪3开始投影所需内容到相应的主屏幕7、屏幕8上。当手动激光笔1投射到主屏幕7任意位置上出现亮斑时，探测仪4探测到该亮斑的位置坐标，通过无线或者有线网络将亮斑的坐标信息传输给MCU控制处理器5。通过MCU控制处理器5的运算处理将坐标位置转换成自动激光笔2转动的角度数据，通过有线或者无线网络分别传送给屏幕8侧的投影仪3上的步进电机6，步进电机控制6通过调整自动激光笔2的方向和角度向屏幕8在与主屏幕7相同的位置投射激光信号。In the embodiment, when the automatic tracking laser pointer system for multiple screens is working, the projectors 3 on the main screen 7 and 8 sides start to project the required content onto the corresponding main screen 7 and screen 8 . When the manual laser pointer 1 is projected onto the main screen 7 and a bright spot appears on any position, the detector 4 detects the position coordinates of the bright spot, and transmits the coordinate information of the bright spot to the MCU control processor 5 through a wireless or wired network. Convert the coordinate position into the angle data of the automatic laser pointer 2 rotation through the arithmetic processing of the MCU control processor 5, and transmit it to the stepping motor 6 on the projector 3 on the screen 8 side respectively through a wired or wireless network, and the stepping motor controls the 6 By adjusting the direction and angle of the automatic laser pointer 2, the laser signal is projected to the screen 8 at the same position as the main screen 7.
在本发明的另一个实施例中，探测仪4可以集成在投影仪3上。所述的探测仪4包括四象限探测器。其中，四象限探测器探测到亮斑的位置坐标，四象限探测器与MCU控制处理器5通过网络连接，可以将位置坐标传送给该MCU控制处理器5。In another embodiment of the present invention, the detector 4 can be integrated on the projector 3 . The detector 4 includes a four-quadrant detector. Wherein, the four-quadrant detector detects the position coordinates of the bright spots, and the four-quadrant detector is connected to the MCU control processor 5 through a network, and the position coordinates can be transmitted to the MCU control processor 5 .
较佳地，所述的四象限探测器是把四个性能相同的光电探测器按照直角坐标的要求排列成四个象限做在同一个芯片上，中间有十字形沟道隔开。以四象限探测器中心为坐标原点，半径为R(确保覆盖整个屏幕)，激光笔投射在屏幕上的亮斑中心为O(x,y),半径为r，每个象限输出的电信号强弱与该象限探测器光敏面积接收到的光能量多少是一致的。目标亮斑经光学系统后在四象限光电探测器上成像，当目标光斑成像不在光轴上时，四象限上的探测器输出的光信号幅度不同，比较四个光信号的幅度大小就可以知道目标成像在哪一个象限上，也就知道了目标亮斑的具体位置坐标。Preferably, the four-quadrant detector is made on the same chip by arranging four photodetectors with the same performance in four quadrants according to the requirements of rectangular coordinates, separated by a cross-shaped channel in the middle. Taking the center of the four-quadrant detector as the coordinate origin, the radius is R (to ensure that the entire screen is covered), the center of the bright spot projected by the laser pointer on the screen is O(x,y), the radius is r, and the electrical signal output by each quadrant is strong. Weakness is consistent with the amount of light energy received by the photosensitive area of the quadrant detector. The target bright spot is imaged on the four-quadrant photodetector after passing through the optical system. When the target spot imaging is not on the optical axis, the amplitude of the optical signal output by the four-quadrant detector is different, and the amplitude of the four optical signals can be known. In which quadrant the target is imaged on, the specific location coordinates of the bright spot of the target are known.
在本发明的另一个实施例中，探测仪4还可以是直接在主屏幕7的边缘上安装传感器和接收器。较佳地，以主屏幕7的左下角为二维坐标的原点，主屏幕7的底部横轴为二维坐标的X轴，主屏幕7的左侧竖轴为二维坐标的Y轴，在X轴和Y轴上按一定间距紧密排列传感器，在X轴和Y轴的对应边上按同样的间距紧密排列与传感器对应的接收器。In another embodiment of the present invention, the detector 4 can also directly install sensors and receivers on the edge of the main screen 7 . Preferably, the lower left corner of the main screen 7 is the origin of the two-dimensional coordinates, the horizontal axis at the bottom of the main screen 7 is the X axis of the two-dimensional coordinates, and the vertical axis on the left side of the main screen 7 is the Y axis of the two-dimensional coordinates. The sensors are closely arranged at a certain distance on the X-axis and the Y-axis, and the receivers corresponding to the sensors are closely arranged at the same distance on the corresponding sides of the X-axis and the Y-axis.
也就是说，一个传感器对应一个接收器。X轴和Y轴的传感器形成行和列扫描，当手动激光笔投射到屏幕某个位置产生亮点时，亮点就会阻断行列扫描信号，此时，对应的接收器就会检测到亮点的位置，与X轴对应的接收器检测到亮点的横坐标，与Y轴对应的接收器检测到亮点的纵坐标。然后，相应的X轴和Y轴接收器同时将亮点的位置坐标传输给MCU控制处理器5，MCU控制处理器5再将亮点的位置坐标处理转换成步进电机6能识别的信号，从而控制相应自动激光笔2的方向和角度，并在相应的屏幕相同位置上投射激光信号。That is, one sensor corresponds to one receiver. The X-axis and Y-axis sensors form a row and column scan. When the manual laser pointer is projected to a certain position on the screen to generate a bright spot, the bright spot will block the row and column scanning signal. At this time, the corresponding receiver will detect the position of the bright spot. , the abscissa of the bright spot detected by the receiver corresponding to the X axis, and the ordinate of the bright spot detected by the receiver corresponding to the Y axis. Then, the corresponding X-axis and Y-axis receivers simultaneously transmit the position coordinates of the bright spots to the MCU control processor 5, and the MCU control processor 5 converts the position coordinates of the bright spots into signals that can be recognized by the stepping motor 6, thereby controlling Corresponding to the direction and angle of the automatic laser pointer 2, and projecting a laser signal at the same position on the corresponding screen.
作为本发明的一个实施例，MCU控制处理器5是将采集到的亮斑中心的像素坐标经过运算处理，转换成自动激光笔转动的角度数据，再通过有线或者无线网络将数据传给步进电机6以控制自动激光笔转动相应的角度，实现自动激光笔2对投影幕布相同位置的照射。As an embodiment of the present invention, the MCU control processor 5 converts the collected pixel coordinates of the center of the bright spot into the angle data of the automatic laser pointer through calculation processing, and then transmits the data to the stepper through a wired or wireless network. The motor 6 controls the automatic laser pointer to rotate at a corresponding angle, so as to realize the irradiation of the automatic laser pointer 2 on the same position of the projection screen.
较佳地，由于投影往往不是规则的四边形而是带有较小曲率的类似四边形，为适应这种情况，转换时采用最小二乘法。即通过最小二乘法将坐标数据转换成角度数据。优选地，采用最小二乘法时，要将数据点处的偏差，即严格为零，但是误差是不能完全消除的，就采用求偏差平方和，即最小。其中，m＝1,2,3...，(x,y)为光斑坐标点。在数字信号处理角度来说，在误差范围内，可以认为是原来点的坐标位置的转换。Preferably, since the projection is often not a regular quadrilateral but a similar quadrilateral with a small curvature, in order to adapt to this situation, the least square method is used for conversion. That is, the coordinate data is converted into angle data by the least square method. Preferably, when using the least squares method, the data points the deviation at is strictly zero, but the error cannot be completely eliminated, so the sum of squared deviations is used, that is minimum. Wherein, m=1, 2, 3..., (x, y) are the spot coordinates. From the perspective of digital signal processing, within the error range, it can be considered as the transformation of the coordinate position of the original point.
作为一个实施例，MCU控制处理器5将幕布平均分为四个象限，以激光笔光斑为一个像素单位，则幕布的每个象限分别由M1*N1，M2*N2，M3*N3，M4*N4个像素构成，用MCU控制处理器5中四个存储芯片分别进行四个m*n的存储rom。幕布上每个象限上的每一个像素对应相应象限的存储芯片中的一个事先存储好的电压值或者电流值，当光斑照射在幕布上时，MCU控制处理器5中的CPU芯片就根据光斑位置所在的象限进行查表(也就是查存储rom)，将得到电压值或者电流值送至MCU控制处理器5的处理单元进行数字信号处理，最后在将处理得到的电脉冲信号送至步进电机，步进电机根据该电脉冲信号进行相应角度的转动。As an example, the MCU control processor 5 divides the curtain into four quadrants on average, and with the laser pointer spot as a pixel unit, each quadrant of the curtain consists of M1*N1, M2*N2, M3*N3, M4* N4 pixels are used to control the four memory chips in the processor 5 to store four m*n memory roms respectively. Each pixel on each quadrant on the screen corresponds to a pre-stored voltage value or current value in the memory chip of the corresponding quadrant. Look up the quadrant (that is, check the storage rom), and send the obtained voltage value or current value to the processing unit of the MCU control processor 5 for digital signal processing, and finally send the processed electric pulse signal to the stepping motor , the stepper motor rotates at a corresponding angle according to the electric pulse signal.
另外，步进电机6是将电脉冲信号转变为角位移或线位移的开环控制元步进电机件。在非超载的情况下，步进电机6的转速、停止的位置只取决于脉冲信号的频率和脉冲数，而不受负载变化的影响，当步进驱动器接收到一个脉冲信号，它就驱动步进电机按设定的方向转动一个固定的角度。可以通过控制脉冲个数来控制角位移量，从而达到准确定位的目的。同时可以通过控制脉冲频率来控制电机转动的速度和加速度，从而达到调速的目的。In addition, the stepper motor 6 is an open-loop control element stepper motor that converts electrical pulse signals into angular displacement or linear displacement. In the case of non-overload, the speed and stop position of the stepper motor 6 only depend on the frequency and number of pulses of the pulse signal, and are not affected by the load change. When the stepper driver receives a pulse signal, it drives the stepper The feed motor rotates a fixed angle in the set direction. The angular displacement can be controlled by controlling the number of pulses, so as to achieve the purpose of accurate positioning. At the same time, the speed and acceleration of the motor can be controlled by controlling the pulse frequency, so as to achieve the purpose of speed regulation.
这里所需要的脉冲信号是MCU控制处理器5传送过来的，主屏幕7上的光斑信息传到MCU控制处理器5，处理成步进电机6需要的脉冲信号。具体来说，坐标信息经过MCU控制处理器5处理成电脉冲信号，采用的步进电机6的步距角度多为3度或1.5度，定，转子都做成多齿。The pulse signal required here is sent by the MCU control processor 5, and the light spot information on the main screen 7 is transmitted to the MCU control processor 5, and processed into the pulse signal required by the stepping motor 6. Specifically, the coordinate information is processed into an electric pulse signal through the MCU control processor 5, and the step angle of the stepping motor 6 adopted is mostly 3 degrees or 1.5 degrees, and both the stator and the rotor are made of multiple teeth.
这里的步进电机6有很多种，例如三相单三拍、三相双三拍、三相六拍，还有四相的。假如是三相三拍的，三相为A相，B相，C相。三相绕组中每次有一相通电，而且一个循环周期共包括三个脉冲，即为三相单三拍。毎来一个电脉冲，转子转过30度，成为步距角。还有，转子的旋转方向取决于三相线圈的通电顺序，改变通电顺序即可改变方向。There are many kinds of stepper motors 6 here, such as three-phase single-three-shot, three-phase double-three-beat, three-phase six-beat, and four-phase. If it is a three-phase three-shot, the three phases are A phase, B phase, and C phase. One phase of the three-phase winding is energized each time, and a cycle includes three pulses in total, that is, three-phase single-three beats. Every time an electric pulse comes, the rotor rotates 30 degrees, which becomes the step angle. In addition, the rotation direction of the rotor depends on the energization sequence of the three-phase coils, and the direction can be changed by changing the energization sequence.
还需要说明的是，自动激光笔2每转动完一次，就会进行初始化，恢复到初始位置上。It should also be noted that, every time the automatic laser pointer 2 is rotated once, it will be initialized and returned to the initial position.
作为本发明的另一个实施例，所述的主屏幕7和至少一个屏幕8所采用的屏幕尺寸可以采用一致的，也可以采用不一致的尺寸屏幕。当采用一致的，则主屏幕7上的光斑可以直接通过自动激光笔2投影到至少一个屏幕8上。当采用不一致的屏幕尺寸时，可以用比例尺，根据屏幕的大小来调节步进电机6的步距角和转向。As another embodiment of the present invention, the screen sizes of the main screen 7 and the at least one screen 8 may be the same, or screens of different sizes may be used. When consistent, the light spots on the main screen 7 can be directly projected onto at least one screen 8 through the automatic laser pointer 2 . When using inconsistent screen sizes, the scale can be used to adjust the step angle and steering of the stepping motor 6 according to the size of the screen.
作为本发明的一个实施例，参阅图2所示，为本发明实施例中用于多屏幕的自动寻踪激光笔的方法流程示意图，所述用于多屏幕的自动寻踪激光笔的方法包括：As an embodiment of the present invention, referring to FIG. 2 , it is a schematic flowchart of a method for automatically tracking a laser pointer for multiple screens in an embodiment of the present invention, and the method for automatically tracking a laser pointer for multiple screens includes :
步骤201，手动激光笔1将光斑投影在主屏幕7上。Step 201 , the manual laser pointer 1 projects the light spots on the main screen 7 .
步骤202，通过探测仪4对主屏幕7上的光斑进行实时采集。Step 202 , collect the light spots on the main screen 7 in real time through the detector 4 .
较佳地，探测仪4可以采用四象限探测器探测到亮斑的位置坐标，四象限探测器与MCU控制处理器5通过网络连接，可以将位置坐标传送给该MCU控制处理器5。或者，探测仪4采用直接在主屏幕7的边缘上安装传感器和接收器的方式实时采集主屏幕7上的光斑。Preferably, the detector 4 can use a four-quadrant detector to detect the position coordinates of the bright spots, and the four-quadrant detector is connected to the MCU control processor 5 through a network, and can transmit the position coordinates to the MCU control processor 5 . Alternatively, the detector 4 collects the light spots on the main screen 7 in real time by directly installing sensors and receivers on the edge of the main screen 7 .
步骤203，探测仪4将采集的光斑坐标数据传送给MCU控制处理器5，该MCU控制处理器5经过运算处理，将光斑坐标数据转换成自动激光笔转动的角度数据，再传给步进电机6。Step 203, the detector 4 transmits the collected light spot coordinate data to the MCU control processor 5, and the MCU control processor 5 converts the light spot coordinate data into the angle data of the automatic laser pointer rotation through calculation processing, and then transmits it to the stepping motor 6.
作为实施例，转换时采用最小二乘法。即通过最小二乘法将坐标数据转换成角度数据。优选地，采用最小二乘法时，要将数据点处的偏差，即严格为零，但是误差是不能完全消除的，就采用求偏差平方和，即最小。在数字信号处理角度来说，在误差范围内，可以认为是原来点的坐标位置的转换。As an example, the least squares method is used for conversion. That is, the coordinate data is converted into angle data by the least square method. Preferably, when using the least squares method, the data points the deviation at is strictly zero, but the error cannot be completely eliminated, so the sum of squared deviations is used, that is minimum. From the perspective of digital signal processing, within the error range, it can be considered as the transformation of the coordinate position of the original point.
步骤204，步进电机6根据角度数据控制自动激光笔2转动相应的角度，实现自动激光笔2对屏幕8的照射。Step 204 , the stepping motor 6 controls the automatic laser pointer 2 to rotate a corresponding angle according to the angle data, so as to realize the irradiation of the automatic laser pointer 2 on the screen 8 .
较佳地，步进电机6根据MCU控制处理器5传送过来的脉冲信号进行步距角和转向的调节，来实现自动激光笔2的转动。Preferably, the stepper motor 6 adjusts the step angle and steering according to the pulse signal sent by the MCU control processor 5 to realize the rotation of the automatic laser pointer 2 .
综上所述，本发明提供的用于多屏幕的自动寻踪激光笔系统，创造性地提出了能够实现激光笔投射到屏幕上的亮点自动寻踪；也就是说，能够激光笔投射到屏幕上的亮点的位置进行探测；并且，可以对激光笔投射到屏幕上亮点的位置坐标精确测量；而且，所述的用于多屏幕的自动寻踪激光笔系统能够针对多屏幕的投影同时进行精准控制；另外，根据主屏幕侧的精确光斑位置，通过MCU控制处理器和步进电机控制屏幕侧的自动激光笔进行完全复制的投影；且实现了在其他屏幕上同时显示的功能；最后，整个所述的用于多屏幕的自动寻踪激光笔系统简便、紧凑，易于实现。In summary, the automatic tracking laser pointer system for multiple screens provided by the present invention creatively proposes the automatic tracking of bright spots that can realize the laser pointer projected on the screen; that is, the laser pointer can be projected on the screen. The position of the bright spot is detected; and the position coordinates of the bright spot projected by the laser pointer on the screen can be accurately measured; moreover, the automatic tracking laser pointer system for multiple screens can accurately control the projection of multiple screens at the same time ; In addition, according to the precise light spot position on the main screen side, the automatic laser pointer on the screen side is controlled by the MCU to control the processor and the stepping motor to perform a completely replicated projection; and the function of simultaneous display on other screens is realized; finally, the entire The described automatic tracking laser pointer system for multi-screen is simple, compact and easy to implement.
所属领域的普通技术人员应当理解：以上所述仅为本发明的具体实施例而已，并不用于限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。Those of ordinary skill in the art should understand that: the above descriptions are only specific embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention etc., should be included within the protection scope of the present invention.
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| CN201510524641.1ACN105159449B (en) | 2015-08-24 | 2015-08-24 | A kind of automatic seeking track laser pen system for multi-screen |
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| CN201510524641.1ACN105159449B (en) | 2015-08-24 | 2015-08-24 | A kind of automatic seeking track laser pen system for multi-screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106909328A (en)* | 2015-12-23 | 2017-06-30 | 小米科技有限责任公司 | Method, picture pick-up device, terminal and the device being marked to display screen |
| CN106157710A (en)* | 2016-06-27 | 2016-11-23 | 渤海大学 | A kind of university He Tang classroom dedicated multimedia teaching equipment |
| CN108874181B (en)* | 2017-05-08 | 2023-05-09 | 富泰华工业（深圳）有限公司 | Electronic device with laser pointer marking function and laser pointer marking method |
| CN111309203B (en)* | 2020-01-22 | 2021-10-08 | 深圳市格上视点科技有限公司 | Method and device for obtaining positioning information of mouse cursor |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5133050A (en)* | 1988-10-24 | 1992-07-21 | Carleton University | Telescope operating system |
| CN1299987A (en)* | 2001-01-17 | 2001-06-20 | 上海交通大学 | Interactive projecting display system with laser remote controller |
| CN103376921A (en)* | 2012-04-25 | 2013-10-30 | 鸿富锦精密工业（深圳）有限公司 | Laser labeling system and method |
| CN203444655U (en)* | 2013-07-09 | 2014-02-19 | 深圳市思科创科技发展有限公司 | Interactive teaching integrated system |
| CN103984482A (en)* | 2014-05-28 | 2014-08-13 | 重庆大学 | Ordinary camera based laser pointer drawing method |
| CN104133565A (en)* | 2014-07-24 | 2014-11-05 | 四川大学 | Real-time laser point tracking man-machine interaction system realized by utilizing structured light technology |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5133050A (en)* | 1988-10-24 | 1992-07-21 | Carleton University | Telescope operating system |
| CN1299987A (en)* | 2001-01-17 | 2001-06-20 | 上海交通大学 | Interactive projecting display system with laser remote controller |
| CN103376921A (en)* | 2012-04-25 | 2013-10-30 | 鸿富锦精密工业（深圳）有限公司 | Laser labeling system and method |
| CN203444655U (en)* | 2013-07-09 | 2014-02-19 | 深圳市思科创科技发展有限公司 | Interactive teaching integrated system |
| CN103984482A (en)* | 2014-05-28 | 2014-08-13 | 重庆大学 | Ordinary camera based laser pointer drawing method |
| CN104133565A (en)* | 2014-07-24 | 2014-11-05 | 四川大学 | Real-time laser point tracking man-machine interaction system realized by utilizing structured light technology |
| Title |
|---|
| "点光源二维跟踪定位系统设计";王龙生 等;《科协论坛（下半月）》;20101125(第11期);第58-60页* |
| Publication number | Publication date |
|---|---|
| CN105159449A (en) | 2015-12-16 |
| Publication | Publication Date | Title |
|---|---|---|
| CN105159449B (en) | A kind of automatic seeking track laser pen system for multi-screen | |
| CN102495687B (en) | Method, video terminal and system for realizing simple air mouse | |
| CN1837952B (en) | Minimizing dead zones in panoramic images | |
| CN104935848B (en) | A kind of projecting apparatus with camera function | |
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