Device for obtaining outdoor long-distance liquid crystal screen pose

Abstract

The utility model discloses a device for obtaining the pose of an outdoor long-distance liquid crystal screen. The device comprises a female end; the female end is used for acquiring the pose of the liquid crystal screen; the female end comprises a camera, a GPU computer, a Beidou locator and an attitude angle sensor. The camera is used for acquiring photos of all the liquid crystal screens; the Beidou locator and the attitude angle sensor are respectively used for acquiring the position and the attitude of the female end; and the GPU computer is connected with the camera, the Beidou locator and the attitude angle sensor, and is used for receiving a liquid crystal screen picture shot by the camera and calculating the position and attitude of the liquid crystal screen in combination with the position and attitude of the female end. After the pose of each liquid crystal screen is obtained, all the liquid crystal screens can be controlled and displayed in a combined mode.

Description

Technical Field

[0001] The utility model belongs to the field of liquid crystal display, and in particular relates to a device for obtaining the position and posture of an outdoor long-distance liquid crystal screen. Background Art

[0002] In many commercial centers, multiple large LCD screens are installed by different users at different times. These LCD screens display their own advertising content and do not form an overall effect. If you need to form an overall effect, you need to position these screens first.

[0003] Many of these screens are installed on different exterior walls. Traditional measurement solutions can only find their positions, but cannot know their relative postures. Among them, posture includes position and posture. Here, position refers to the positioning in three-dimensional space coordinates, and posture includes the deflection angle, pitch angle and rotation angle of the LCD screen.

[0004] After obtaining the postures of these LCD screens, it is possible to combine these LCD screens through a processor, split the video, and distribute it to these LCD screens for display, so as to realize the overall combined display of the LCD screens.

[0005] Therefore, in order to realize the combined display of the LCD screens, a device for obtaining the position and posture of the LCD screens is first required, and then the position and posture of the LCD screens are retrieved to form the effect of the overall combination or partial combination. Utility Model Content

[0006] The utility model is based on the existing electronic technology and machine vision technology, and proposes a device for measuring the relative posture of multiple liquid crystal screens, so as to provide posture information that can be retrieved for realizing the combined display of multiple liquid crystal screens.

[0007] The utility model discloses a device for obtaining the position and posture of an outdoor long-distance liquid crystal screen, comprising a female end, which is used to obtain the position and posture of the liquid crystal screen;

[0008] The mother end includes a camera, a GPU computer, a Beidou locator and an attitude angle sensor;

[0009] The camera is used to obtain photos of all LCD screens;

[0010] Beidou locator and attitude angle sensor are used to obtain the position and attitude of the mother end respectively;

[0011] The GPU computer is respectively connected to the camera, Beidou locator and attitude angle sensor, and is used to receive the LCD screen photos taken by the camera, and calculate the position and attitude of the LCD screen in combination with the position and attitude of the mother end.

[0012] Furthermore, the female end also includes a horizontal tripod; the camera is arranged on the horizontal tripod.

[0013] Furthermore, the device for obtaining the position and posture of an outdoor long-distance liquid crystal screen of the utility model further comprises a plurality of sub-terminals; each sub-terminal is connected to a control terminal of a liquid crystal screen,

[0014] Each sub-end includes a communication terminal B, an address coding switch, and an image processing board;

[0015] The address code switch is used to set the address code of the LCD screen;

[0016] The address coding switch is connected to the image processing board, and the image processing board is connected to the control end of the LCD screen through the communication terminal B; the image processing board is used to convert the address code into a two-dimensional code pattern, and send it to the LCD screen through the communication terminal B for display.

[0017] Furthermore, the sub-end also includes a communication end A; the mother end also includes a first communication end;

[0018] The communication terminal A is used to communicate with the mother terminal through the first communication terminal; the communication terminal A is also connected to the image processing board.

[0019] The mother end can send an image to the child end through the first communication end. The image processing board receives the image through the communication end A, processes the image, and then sends it to the LCD screen through the communication end B for display.

[0020] Furthermore, the mother end also includes a first battery for providing power to the camera, GPU computer, Beidou locator, attitude angle sensor and the first communication end.

[0021] Furthermore, the sub-end also includes a second battery for providing power to the communication terminal A, the communication terminal B, the address coding switch, and the image processing board.

[0022] Beneficial effects: The utility model provides a device for obtaining the position and posture of an outdoor long-distance LCD screen. After obtaining the position and posture of each LCD screen, it is beneficial to the overall control and combined display of all LCD screen rows. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a shooting relationship diagram of a specific embodiment of the utility model;

[0024] Figure 2 This is a diagram showing the relationship between the various module structures of the specific embodiment of the utility model. DETAILED DESCRIPTION

[0025] like Figure 2 As shown, a device for obtaining the position and posture of an outdoor long-distance liquid crystal screen of the utility model comprises a mother terminal and a plurality of child terminals;

[0026] The mother end includes a high-definition camera, a small GPU computer, a Beidou locator, an attitude angle sensor, a first communication end, a horizontal tripod and a first battery, etc.

[0027] The high-definition camera is connected to the small GPU computer to take pictures of the LCD screen and send the pictures of the LCD screen to the small GPU computer. In the specific embodiment of the utility model, a Boguan 8k ultra-high-definition camera model G1pro is used.

[0028] The Beidou locator is connected to the small GPU computer and sends the positioning information of the mother end to the small GPU computer. In the specific embodiment of the utility model, the GT220L Beidou locator of Tuhu is used.

[0029] The attitude angle sensor is connected to the small GPU computer and sends the attitude information of the mother end to the small GPU computer. In the specific embodiment of the utility model, the RM3100 model of Witt Intelligent is used, which can collect various attitude angles of the mother end.

[0030] The first communication terminal is connected to the small GPU computer, and communicates with multiple sub-terminals wirelessly to issue commands. In the embodiment of the utility model, the SX1278 LORA communication module of Aimoxun is used, and the communication distance is 3 kilometers, which can communicate with multiple sub-terminals;

[0031] The function of the horizontal tripod is to adjust the camera for horizontal use. In this embodiment, a 1.7-meter horizontal tripod is used, which is roughly the average height of a normal person.

[0032] The first battery provides power to the device at the female end.

[0033] The function of the small GPU computer is to receive information from the high-definition camera, Beidou locator, attitude angle sensor, and communicate with multiple sub-ends through the first communication terminal to issue commands. And provide computing resources to the built-in binocular vision algorithm and QR code recognition algorithm for calculation, saving and sending relevant data. In the specific embodiment of the utility model, a computer with a built-in small GPU of NVIDIA's Nano Jetson is used. For a detailed description of the principle of binocular vision positioning, see https: / / zhuanlan.zhihu.com / p / 93497205, and for the code, see https: / / github.com / redpower1998 / StereoBM. The specific conversion principle and code of the QR code recognition principle can be seen at https: / / blog.csdn.net / qq_40833182 / article / details / 81459333. When the address code on each LCD screen in the image is analyzed, the address code is then aligned with the position, posture and other information.

[0034] The sub-end includes a communication end A, a communication end B, an image processing board, an address coding switch and a second battery.

[0035] The communication terminal A is connected to the image processing board and communicates with the mother terminal through the first communication terminal; the image processing board is connected to the LCD screen through the communication terminal B; the address coding switch is connected to the image processing board;

[0036] Among them, the function of communication terminal A is to communicate with the first communication terminal of the mother end by wireless means, accept commands, and forward them to the image processing board. In the embodiment of the utility model, the SX1278 LORA communication module of Amoxon is used, with a communication distance of 3 kilometers, and can communicate with multiple sub-ends.

[0037] The function of the communication terminal B is to communicate with the LCD screen by wired means and forward the display content of the image processing board to the LCD screen. In the embodiment of the utility model, a USB lightning interface is used, and the LCD screen is developed by our company Jiangsu Austin Optoelectronics Technology Co., Ltd., which has a USB lightning interface. The USB lightning interface can not only communicate, but also provide power from the LCD screen to the sub-terminal.

[0038] The function of the address coding switch is to accept the setting of the operator and set an address code for each sub-end. In the specific implementation of the utility model, a 20-bit ICEMON finger-dip switch is used, which is set by the operator to open as 0 and close as 1, and then read the 20-bit 01 switch to obtain a binary code.

[0039] Among them, the image processing board is used to receive information from communication terminals A and B, receive the address code of the address coding switch, and convert the address code of the book end into a QR code (the specific conversion principle and code can be found at https: / / blog.csdn.net / qq_40833182 / article / details / 81459333), and send it to the LCD screen for display. Optionally, it can also be used to crop the image after obtaining the positioning information in the future. In the specific embodiment of the utility model, the image development board of Oweix EP4CE is used.

[0040] Among them, the function of the second battery is to provide power for the entire sub-end, and it provides power together with the USB Thunderbolt interface of the communication end B.

[0041] The utility model discloses a device for obtaining the posture of an outdoor long-distance liquid crystal screen. When used to obtain the posture of an outdoor long-distance liquid crystal screen, the overall operation process is as follows. The ideal working time is at night, which can reduce the interference of daylight on the shooting effect during the day.

[0042] Step 1: One sub-end corresponds to an original control end of an LCD screen. Through the communication end of the LCD screen, the operator connects the sub-end to the control end of the original LCD screen, and sets the address coding switch to encode each sub-end.

[0043] Step 2: After the mother end establishes a connection with each sub-end through the first communication end of the mother end and the communication end A of the sub-end, the address code of each sub-end is set, so that each LCD screen displays a respective QR code, and the information in the QR code is a unique address code set by its address code switch;

[0044] Step 3: Figure 1 As shown, the operator adjusts the direction of the high-definition camera to be horizontal through a horizontal tripod, with the LCD screen included in the field of view, and collects a photo at the first shooting position.

[0045] Step 4: The operator moves horizontally for a certain distance (eg, 5 meters, 10 meters, etc.), repeats step 3, and takes the second photo of the LCD screen in step 3 at the second shooting position.

[0046] Step 5: Repeat 3 to 4 until all LCD screens are photographed.

[0047] Step 6. The small GPU computer on the mother end combines the data of the Beidou locator and attitude angle sensor of each photo, and uses the binocular vision positioning principle (for details, see https: / / zhuanlan.zhihu.com / p / 93497205, and for code, see https: / / github.com / redpower1998 / StereoBM) to calculate the relative position, posture and other information of each LCD screen in three-dimensional space, and save their address codes, positions and postures. The address code on each LCD screen is identified through the QR code, and then the address code is aligned with the position, posture and other information.

[0048] Step 7: The mother end sends the position of each LCD screen relative to the mother end, as well as the values ​​of the Beidou locator and attitude angle sensor during shooting, to the child end through the first communication end. The child end retains the original LCD screen interface for future image analysis.

[0049] By implementing the utility model, users can simply and quickly measure the position and posture of each LCD screen, and then in the future this information can be further called by the publicity department of the business center to form an overall combination or a partial combination effect.

Claims

1. A device for obtaining the position and posture of an outdoor long-distance liquid crystal screen, characterized in that: It includes a female end; the female end is used to obtain the position and posture of the liquid crystal screen; The mother end includes a camera, a GPU computer, a Beidou locator and an attitude angle sensor; The camera is used to obtain photos of all LCD screens; Beidou locator and attitude angle sensor are used to obtain the position and attitude of the mother end respectively; The GPU computer is respectively connected to the camera, Beidou locator and attitude angle sensor, and is used to receive the LCD screen photos taken by the camera, and obtain the position and attitude of the LCD screen in combination with the position and attitude of the mother end.

2. A device for obtaining the position and posture of an outdoor long-distance liquid crystal screen according to claim 1, characterized in that: The female end also includes a horizontal tripod; the camera is set on the horizontal tripod.

3. The device for obtaining the position and posture of an outdoor long-distance liquid crystal screen according to claim 1, characterized in that: Also includes a plurality of sub-ends; Each sub-end is connected to a control end of an LCD screen. Each sub-end includes a communication terminal B, an address coding switch, and an image processing board; The address code switch is used to set the address code of the LCD screen; The address coding switch is connected to the image processing board, and the image processing board is connected to the control terminal of the LCD screen through the communication terminal B; The image processing board is used to convert the address code into a two-dimensional code pattern and send it to the LCD screen for display through the communication terminal B.

4. The device for obtaining the position and posture of an outdoor long-distance liquid crystal screen according to claim 3, characterized in that: The sub-end also includes a communication terminal A; the female end also includes a first communication terminal; The communication terminal A is used to communicate with the first communication terminal of the mother terminal; The communication terminal A is also connected to the image processing board.

5. The device for obtaining the position and posture of an outdoor long-distance liquid crystal screen according to claim 4, characterized in that: The mother end also includes a first battery for providing power to the camera, GPU computer, Beidou locator, attitude angle sensor and the first communication end.

6. The device for obtaining the position and posture of an outdoor long-distance liquid crystal screen according to claim 4, characterized in that: The sub-end also includes a second battery for providing power to the communication end A, the communication end B, the address coding switch, and the image processing board.

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