Auxiliary device for visible light positioning tests

Abstract

This utility model discloses an auxiliary device for visible light positioning testing, including a top plate and three or more columns. The top plate is sleeved and installed on the upper end of the columns. A coordinating plate is arranged below the top plate and sleeved on the columns, with the top plate and the coordinating plate spaced apart to form a first spatial distance. Two or more locking rings are sleeved on the columns and threadedly connected to the columns. The locking rings abut against the lower ends of the top plate and the coordinating plate, and the locking rings adjust the first spatial distance on the columns. A light array marker is arranged at the lower end of the top plate, which is used to set a light array that illuminates the coordinating plate, and the light array has at least three light sources. Boundary markers corresponding to the light array markers are arranged on the coordinating plate. A photodetector corresponding to the light array is placed on the coordinating plate, which is intended to improve the problem that the relative position is easily deviated when adjusting the response test point during the simulation experiment, resulting in a large error.

Description

Technical Field

[0001] This utility model relates to an auxiliary device for visible light positioning experiments, specifically an auxiliary device for visible light positioning tests. Background Technology

[0002] Current visible light positioning technology primarily utilizes indoor visible light LEDs as signal carriers. Its positioning methods include RSS (Receiving Signal Strength) to acquire received signal strength, TOA (Time of Arrival) measurement to determine time of arrival (TOA), TDOA (Time Difference of Arrival) measurement to determine time difference of arrival (TDOA), and AOA (Angle of Arrival) measurement to determine angle of arrival (AOA). However, TOA and TDOA methods are complex, AOA requires expensive angle measurement equipment, and RSS is prone to ranging errors.

[0003] Current research on RSS technology for visible light positioning improves accuracy through coordinate correction. The correction method primarily utilizes LEDs as signal sources, estimating the centroid of the overlapping area of ​​the three-light positioning and relative illumination ranging circles, and then combining this with a region boundary point coordinate correction algorithm to achieve high-precision positioning of the region boundary. However, in actual experiments, to verify the applicability of this algorithm in real-world scenarios, it is usually necessary to construct a three-dimensional space indoors to simulate the indoor positioning environment.

[0004] Considering the distance error that exists when the detector captures the source signal, it is necessary to conduct tests at multiple test points and take the average of the multiple positioning results as the final positioning result for each test point to improve accuracy. Therefore, how to better adjust the response test points during the simulation experiment and reduce the impact of errors in the adjustment process is worthy of study. Utility Model Content

[0005] The purpose of this invention is to provide an auxiliary device for visible light positioning testing, in order to improve the problem that the relative position of the response test point is easily deviated during the adjustment process in the simulation experiment, resulting in a large error.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: an auxiliary device for visible light positioning testing, comprising a top plate and columns, wherein there are three or more columns, the top plate is sleeved and installed on the upper end of the columns, a coordinating plate is provided below the top plate, the coordinating plate is sleeved on the columns, and the top plate and the coordinating plate are spaced apart to form a first spatial distance; two or more locking rings are sleeved on the columns, the locking rings are threaded to the columns, the locking rings abut against the lower ends of the top plate and the coordinating plate, and the locking rings adjust the first spatial distance on the columns; a light array mark is provided at the lower end of the top plate, the lower end of the top plate is used to set a light array to illuminate the coordinating plate, and the light array has at least three light sources; boundary marks corresponding to the light array mark are provided on the coordinating plate; a photodetector corresponding to the light array is placed on the coordinating plate.

[0007] The technical concept is as follows: A test benchmark is built using a top plate and columns. The distance between the collaborative plate and the top plate is used as the first spatial distance to form an adjustable experimental fixed height. By setting a locking ring, the relative distance between the collaborative plate and the top plate can be better adjusted, so that the lamp array placed on the top plate can act on the collaborative plate at different heights, which is beneficial for studying the experimental error of visible light under different height conditions. Secondly, by setting boundary marks on the collaborative plate, a rectangular coordinate system is established with the center of the collaborative plate area as the origin, thereby forming multiple positioning areas on the collaborative plate. The positioning areas on the collaborative plate are used to assist in the placement of photodetectors, so that the spatial positioning relationship between the photodetectors and the lamp array can be adjusted in a targeted manner in the simulation experiment.

[0008] Preferably, the upper end of the column is also provided with a nut corresponding to the locking ring, and the nut is positioned above the locking ring; the outer diameter of the nut is smaller than the outer diameter of the locking ring, and the nut is used to abut against the upper end of the top plate or the upper end of the cooperating plate.

[0009] A further technical solution is that the collaborative board includes two transparent trays of the same size, with a cardboard sandwiched between the two transparent trays. The cardboard is used to mark boundary marks. The two transparent trays respectively abut against a nut and a locking ring, and the photodetector is used for positioning through the boundary marks.

[0010] Preferably, the lower end of the top plate is also provided with a connecting plate, and parallel guide rails are provided on both sides of the top plate. The two ends of the connecting plate extend into the guide rails respectively. The connecting plate is used to translate between the two guide rails, and at least one of the light sources is fixed on the connecting plate.

[0011] A further technical solution is that the length direction of the guide rail is longitudinal; the length direction of the connecting plate is transverse; the cooperating plate has one or more inlay slots in both the longitudinal and transverse directions; the inlay slots are placed on the edge of the cooperating plate; a first level ruler is installed in the inlay slots to express the horizontal state of the cooperating plate in the longitudinal and transverse directions; a second level ruler is provided below the guide rail; a third level ruler is provided at the lower end of the top plate parallel to the connecting plate; the third level ruler is set on the edge of the top plate.

[0012] A further technical solution is that the light array is marked with a coordinate system at the lower end of the top plate, and the coordinate system is used to determine the spacing between the light sources; the connecting plate is made of transparent material, and the connecting plate is arrayed with scales, which are used to correspond to the coordinate system, and the connecting plate drives at least one light source to translate.

[0013] Preferably, the guide rail is detachably installed at the lower end of the top plate, and the guide rail is provided with a slider that is slidably connected. The two ends of the connecting plate are connected to the slider, and the two ends of the guide rail are provided with an insertion port that communicates with the inner cavity. The insertion port is used to insert the slider.

[0014] A further technical solution is that a guide groove is provided below the guide rail, and a mounting hole is provided on the slider corresponding to the position of the guide groove. The mounting hole is used to insert a guide rod, and the size of the guide rod is smaller than the width of the guide groove.

[0015] Preferably, the column is provided with a scale, the lower end of the column is provided with a connecting column, and the lower end of the connecting column is provided with a connecting hole for external contact with the ground support.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention facilitates the installation of the top plate and the collaborative plate through the column, and uses the adjustable first spatial distance of the limiting ring to adjust the distance between the light array and the photoelectric sensor. By adjusting the first spatial distance, the experiment can simulate the propagation characteristics of visible light at different heights, so that the data acquired by the photoelectric sensor can present more dimensions. This is beneficial for researchers to reproduce a variety of real-world scenarios in the laboratory to help evaluate existing positioning algorithms.

[0018] This invention, through boundary markings on the collaborative board and the use of a transparent tray to hold the paper, not only facilitates the positioning and placement of the photodetector but also simplifies data recording and analysis during experiments. Simultaneously, the transparent tray design allows researchers to easily observe the experimental conditions below the collaborative board and determine if the illumination direction of the light array is incorrect.

[0019] Meanwhile, the connecting plate and guide rail structure set at the lower end of the top plate, as well as the scale design on the connecting plate, can adjust the position of a light source to a certain extent, thereby making it easy to change the relative position between light sources and thus study the influence of different light source layouts on the positioning experiment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is the column of this utility model.

[0022] Figure 3 This is the top plate of the present utility model.

[0023] Figure 4 This is a schematic diagram of the inlay groove.

[0024] Figure 5 This is a schematic diagram of the guide rail installation.

[0025] Figure 6 This is a schematic diagram of the guide rail installation of this utility model.

[0026] Figure 7 This is a schematic diagram of the slider and guide rail working together.

[0027] Figure 8 This is a schematic diagram of one embodiment. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0029] Currently, the experiment primarily uses an LED array (located on the indoor ceiling) to simulate illumination, and a detector on the ground detects the signals emitted by the LED array. The LED array utilizes a microcontroller to encode the LED light sources and drive them to transmit signals. A detector on the detection surface (indoor floor) captures and amplifies these signals, converts and decodes the captured voltage signals, and obtains the position coordinates using a specific positioning algorithm. Specifically, four LED lights are placed in a simulated indoor space as light source emitters, forming an array in a square layout. A photoelectric detector is positioned in the positioning area below the array to determine the set height of the array and the coordinates of the positioning area. Since the illuminance of the LEDs gradually decreases outward from the center of the light source projection and exhibits rotational symmetry, accurate detector positioning requires finding the centroid of three overlapping distance measuring circles centered on the ground projections of adjacent LEDs. This centroid is the positioning coordinate, used as the pre-correction coordinate near the boundary. The system then adjusts the height and distance parameters, the array parameters, and the coordinate states of the photoelectric detector in different positioning areas. The experiment involved setting up multiple test points 20cm apart within a designated positioning area. A receiver used four LED light sources and displayed the positioning coordinates using a positioning algorithm. The coordinates of each test point were measured multiple times, and the average of these measurements was taken as the final positioning result for each point. The final positioning results were then compared using the error distribution with those obtained using the boundary coordinate correction scheme to verify the experimental effectiveness.

[0030] refer to Figure 1 and Figure 2 As shown, one embodiment of this utility model is an auxiliary device for visible light positioning testing, including a top plate 1 and columns 2. The columns 2 are vertically arranged, and there are three or more columns 2. Each column 2 provides at least one support to the top plate 1. The columns 2 form at least three supports to meet the basic structure of three points forming a plane, which is beneficial for the top plate 1 to form a horizontal working surface on the columns 2.

[0031] To facilitate the installation of the top plate 1, the top plate 1 is fitted and installed on the upper end of the column 2. The top plate 1 has a through hole that matches the outer diameter of the column 2. The top plate 1 passes through the column 2. When the column 2 serves as the installation base, the top plate 1 can move up and down on the column 2. When the top plate 1 moves to a set position on the column 2, the top plate 1 is fixed to the column 2, and the top plate 1 simulates the top of the indoor environment.

[0032] Considering that the ceiling panel 1, simulating an indoor environment, typically also has a bottom, a supporting panel 3 is installed below the ceiling panel 1. The supporting panel 3 serves as the bottom of the corresponding indoor environment. The supporting panel 3 is fitted onto the column 2, allowing it to move on the column 2. Both the supporting panel 3 and the ceiling panel 1 move vertically, and a first spatial distance is established between the ceiling panel 1 and the supporting panel 3. This first spatial distance defines the distance between the supporting panel 3 and the ceiling panel 1, and also represents the height of the indoor environment.

[0033] To ensure the controllability of the first spatial distance, two or more locking rings 4 are fitted on the column 2. The locking rings 4 are threadedly connected to the column 2. The locking rings 4 abut against the lower end of the top plate 1 and the cooperating plate 3, and the locking rings 4 adjust the first spatial distance on the column 2.

[0034] The top plate 1 has a light array marker at its lower end, and the lower end of the top plate 1 is used to set the light array that illuminates the coordination plate 3, and the light array has at least four light sources; the coordination plate 3 has a boundary marker corresponding to the light array marker; the coordination plate 3 is used to place the photodetector corresponding to the light array.

[0035] The top plate 1 is made of lightweight acrylic. The light array can be fixed to the lower end of the top plate 1 by adhesive. Of course, for easy disassembly and assembly, a layer of iron sheet can be added to the lower surface of the top plate 1. The light array is fixed to the lower end of the top plate 1 by magnetic attraction, so as to adjust the different sizes of the light array.

[0036] See Figure 1 and Figure 8As shown, for reference, the auxiliary device of this application can relatively easily establish an indoor visible light positioning experimental platform using four LED arrays and a photodetector. For ease of understanding, the auxiliary device simulates an indoor visible light positioning space. Four LEDs, serving as light sources, are arranged at the lower end of the top plate 1 to form an array, labeled A, B, C, and D for clarity. The light sources on the top plate 1 are evenly distributed at positions with a vertical height equal to the first spatial distance, and act on the coordinating plate 3. The projections of the light sources onto the coordinating plate 3 are points OA, OB, OC, and OD, respectively. When the array is square, the points OA, OB, OC, and OD of the orthographic projections of the array onto the coordinating plate 3 can form a square positioning area with equal side lengths. A Cartesian coordinate system is established with the center of the square positioning area as the origin by boundary marking, and the area is divided into four sub-regions: I, II, III, and IV. Positioning triangles are formed by the vertices, such as the triangle formed by points OA, OB, and OC; the triangle formed by points OB, OC, and OD; the triangle formed by points OA, OB, and OD; and the triangle formed by points OA, OC, and OD. Only the centroids of these triangles need to be marked in the orthographic projection direction to form the spatial position basis. At this point, a photodetector is placed at any position in the sub-region. By detecting the photovoltage values ​​of the four LEDs and combining them with existing photovoltage ranging formulas, the distance between the photodetector and each vertex of the positioning area can be calculated. This allows for indoor positioning experiments, forming the experimental basis for indoor visible light positioning. This is beneficial for analyzing the differences in photovoltage values ​​received by the photodetector at different positions and for testing and verifying the feasibility of existing indoor positioning algorithms and technologies. Since this application mainly constructs an experimental platform to adapt to the relevant experimental platform of the RSS measurement method and for verifying existing formulas and algorithms, this approach is not feasible. For example, many existing VL-IPT related schemes have been replicated experimentally. Therefore, the formulas and algorithms mentioned in this embodiment are not improvements of this application and will not be elaborated here. For those skilled in the art, the coordinate conditions of the simulated test platform are sufficient.

[0037] refer to Figure 1 and Figure 2 As shown, based on the above embodiments, another embodiment of this utility model is that, in order to make it easier to determine the positions of the coordinating plate 3 and the top plate 1, the upper end of the column 2 is also provided with a nut corresponding to the locking ring 4, and the nut is placed above the locking ring 4; the outer diameter of the nut is smaller than the outer diameter of the locking ring 4, and the nut is used to abut against the upper end of the top plate 1 or the upper end of the coordinating plate 3, and moves on the column 2 through the locking ring 4 and the nut to form a clamping effect on the coordinating plate 3 or the top plate 1.

[0038] As an example, locking rings 4 are located below the coordinating plate 3 and the top plate 1, respectively. The positions of the coordinating plate 3 and the top plate 1 on the column 2 are defined by adjusting the position of the locking rings 4. Each column 2 has at least two locking rings 4. After the first locking ring 4 is fixed on the column 2, the coordinating plate 3 is placed in, so that the lower end of the coordinating plate 3 abuts against the locking ring 4. Then, a nut is inserted to clamp the coordinating plate 3. When the last locking ring 4 is placed on the column 2, the top plate 1 is placed in, so that the top plate 1 abuts against the locking ring 4. The nut is then used to press the upper end of the top plate 1 to ensure that the positions of the coordinating plate 3 and the top plate 1 are relatively fixed on the column. Once the positions on multiple columns 2 are determined, the positions of the coordinating plate 3 and the top plate 1 are also determined.

[0039] Furthermore, to better establish corresponding boundary markers on the collaborative plate 3, the collaborative plate 3 includes two transparent trays 301 of the same size. The transparent trays 301 allow for better determination of the orthographic projection of the light array. Generally, the orthographic projection position of the light array can be determined by suspending a counterweight with a thin thread, but two transparent trays 301 of the same size also facilitate collaborative observation by experimental personnel. A card is held between the two transparent trays 301, and the card is used to mark boundary markers. Different card can be set and replaced as needed. Since the transparent trays 301 are in a fixed state, theoretically, they can be temporarily marked with a pen for auxiliary operation, and the card can be replaced when necessary, thus enabling simulation experiments under various size conditions. The two transparent trays 301 respectively abut against the nut and the locking ring 4, and the photodetector is used for positioning through the boundary markers. The positioning method primarily involves the card directly presenting a coordinate system, which is then verified and determined through the coordinate system formed on the boundary markers. This helps to verify whether there are significant deviations in the positioning algorithm corresponding to the experimental process.

[0040] Based on the above embodiments, another embodiment of this utility model is, with reference to Figures 2 to 4 As shown, the lower end of the top plate 1 is also provided with a connecting plate 5. Parallel guide rails 6 are provided on both sides of the top plate 1. The two ends of the connecting plate 5 extend into the guide rails 6 respectively. The connecting plate 5 is used to translate between the two guide rails 6. At least one of the light sources is fixed on the connecting plate 5.

[0041] For reference, guide rails 6 are set on both sides of the top plate 1 and are fixed to the lower end of the top plate 1 by bolts. The two ends of the connecting plate 5 are inserted into the guide rails 6, allowing the connecting plate 5 to move horizontally along the guide rails 6. Under normal conditions, the connecting plate 5 does not affect the lamp array. By moving the connecting plate 5 to the corresponding area below the top plate 1, filler can be filled between the connecting plate 5 and the top plate 1 to increase the upper limit of the load-bearing capacity of the corresponding area of ​​the top plate 1.

[0042] For reference, some supporting materials, such as temperature sensors, can also be placed on the connecting plate 5. Moving the connecting plate 5 to the corresponding position of the light array allows for the acquisition of heat changes in the light array. Of course, a light source can also be fixed on the connecting plate 5. When the light array is not activated, this light source can be used for coordination to facilitate equipment deployment. More importantly, when the light array is activated, the position parameters of this light source can be adjusted to investigate the influence of external light on the distance between the photodetector and each vertex of the positioning area.

[0043] Further reference Figure 3 and Figure 4 As shown, the guide rail 6 is longitudinal; the connecting plate 5 is transverse; the cooperating plate 3 has one or more inlay slots 302 in both the longitudinal and transverse directions. The inlay slots 302 are located at the edges of the cooperating plate 3, and a first level is installed in the inlay slot 302 to indicate the horizontal state of the cooperating plate 3 in both the longitudinal and transverse directions. The first level is mainly installed in the inlay slot 302 and is mainly used to determine whether the cooperating plate 3 is placed horizontally or tilted.

[0044] A second level 601 is provided below the guide rail 6, and a third level 602 parallel to the connecting plate 5 is provided at the lower end of the top plate 1. The third level 602 is located at the edge of the top plate 1. The second level 601 and the third level 602 are generally installed by adhesive. If necessary, the second level 601 and the third level 602 can also be installed by magnetic attraction. Of course, when using magnetic attraction, the material of a local area of ​​the guide rail 6 and the top plate 1 needs to be adjusted to meet the magnetic attraction conditions. For example, if the bottom of the guide rail 6 is made of iron, the mounting surface of its second level 601 has a magnet.

[0045] The levelness of the guide rail 6 and the top plate 1 are tested using the second level ruler 601 and the third level ruler 602, respectively. It should be noted that the top plate 1 and the cooperating plate 3 need to be relatively parallel, so in the general leveling process, the first and second level rulers also need to check the longitudinal and transverse levelness.

[0046] Furthermore, the light array is marked with a coordinate system on the lower end of the top plate 1. This coordinate system is mainly used to determine the placement of the light array and the spacing between the light sources. The connecting plate 5 is made of transparent material. Generally, the connecting plate 5 needs to be moved to a position that does not affect the light array. The use of transparent material for the connecting plate 5 can objectively reduce the impact of the projection of the top plate 1 on the experimental lighting. It is worth noting that the connecting plate 5 is mainly for facilitating the testing of the influence of external lighting on the experiment. The connecting plate 5 is arrayed with scales, which correspond to the coordinate system. The connecting plate 5 drives at least one light source to translate. That is, when a light source is placed on the connecting plate 5, the position of the test light source can be better determined, and the influence conditions of external lighting at different locations in the indoor environment can be simulated.

[0047] Based on the above embodiments, Figures 3 to 5 As shown, in another embodiment of this utility model, to facilitate the adjustment of the position of the connecting plate 5 on the guide rail 5, the guide rail 6 is detachably installed at the lower end of the top plate 1. The guide rail 6 is provided with a sliding block 7, and the connecting plate 5 is connected to the sliding block 7 at both ends. The guide rail 6 is provided with an insertion port 603 communicating with the inner cavity at both ends, and the insertion port 603 is used to insert the sliding block 7. The sliding block 7 is inserted into the guide rail 6 through the insertion port 603, and the connecting plate 5 is respectively installed on the sliding block 7 at both ends. The sliding block 7 can be detached from the guide rail 6.

[0048] Exemplary, for reference Figure 7 As shown, for easier disassembly and installation of the connecting plate 5, its slider 7 is equipped with a mounting plate, and both ends of the connecting plate 5 are equipped with mounting pieces corresponding to the mounting plate. The mounting plate and mounting pieces are attached to each other and locked with bolts. This method allows the connecting plate 5 to be added after the column 2 and top plate 1 are installed, preventing the column 1 from interfering with the sliding of the connecting plate 5 out of the insertion slot 603. That is, during installation, the slider can be directly inserted into the guide rail, allowing the slider to move along the guide rail between the columns, and then the connecting plate 5 can be installed directly through the slider 7.

[0049] Based on the above embodiments, refer to Figure 6 and Figure 7 As shown, in another embodiment of this utility model, to facilitate the movement of the slider in the guide rail 6, a guide groove 604 is provided below the guide rail 6. The slider 7 has a mounting hole corresponding to the guide groove 604. The mounting hole is used to insert a guide rod 8, and the size of the guide rod 8 is smaller than the width of the guide groove 604. That is, the guide rod 8 applies a pushing force to the slider, causing the slider to move to the corresponding position in the guide rail 6. A nut can be fitted onto the guide rod 8, and the nut on the guide rod 8 abuts against the lower end of the guide rail 6, locking the slider 7 to facilitate the installation of the connecting plate 5 at the corresponding position.

[0050] It should be noted that the slider 7 and the guide rail 6 are fitted with a clearance fit. To ensure the stability of the slider 7's movement, a local protrusion can be provided at the lower end of the slider 7. The protrusion contacts the guide rail 6, thereby reducing the friction coefficient during the process of the guide rod 8 applying a pushing force to the slider 7. Of course, the friction can also be reduced by applying lubricating oil to the local protrusion.

[0051] Based on the above embodiments, another embodiment of this utility model is that the column 2 is provided with a scale, and the lower end of the column 2 is provided with a connecting column 201. The lower end of the connecting column 201 is provided with a connecting hole, which is used for an external ground contact bracket. Due to the uncertainty of the indoor environment, in order to ensure the stability of the column 2 installation, a ground contact bracket can be added below the column 2 through the connecting column 201.

[0052] The ground contact bracket can be an existing tripod, an existing support base, or a pole inserted into the ground. Regardless of whether the ground contact bracket is a tripod, a support base, or a pole, its upper end needs to be equipped with a guide post with a mating connection hole. The guide post is used to insert into the connection post. In principle, the ground contact bracket should be set up to ensure that the column is in a vertical position.

[0053] In this specification, terms such as "one embodiment," "another embodiment," "embodiment," and "preferred embodiment" refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same term in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this utility model.

[0054] Although the present invention has been described herein with reference to several illustrative embodiments, it should be understood that many other modifications and implementations can be devised by those skilled in the art, which will fall within the scope and spirit of the principles disclosed herein. More specifically, various variations and modifications can be made to the components and / or layout of the subject matter combination within the scope of the disclosure, drawings, and claims. Besides variations and modifications to the components and / or layout, other uses will be apparent to those skilled in the art.

Claims

1. An auxiliary device for visible light positioning test, comprising a top plate (1) and a stand column (2), the stand column (2) is more than three, the top plate (1) is sleeved and installed on the upper end of the stand column (2), characterized in that: A coordinating plate (3) is provided below the top plate (1), the coordinating plate (3) is sleeved on the column (2), and the top plate (1) and the coordinating plate (3) are spaced apart to form a first spatial distance; Two or more locking rings (4) are fitted on the column (2). The locking rings (4) are threadedly connected to the column (2). The locking rings (4) abut against the bottom of the top plate (1) and the cooperating plate (3). The locking rings (4) adjust the first spatial distance on the column (2). Among them, the lower end of the top plate (1) is provided with a light array mark, the lower end of the top plate (1) is used to set the light array that illuminates the coordination plate (3), and the light array has at least four light sources; the coordination plate (3) is provided with boundary marks corresponding to the light array mark; the coordination plate (3) is used to place the photoelectric detector corresponding to the light array.

2. The auxiliary device for visible light positioning testing according to claim 1, characterized in that: The upper end of the column (2) is also provided with a nut corresponding to the locking ring (4), and the nut is placed above the locking ring (4); the outer diameter of the nut is smaller than the outer diameter of the locking ring (4), and the nut is used to abut against the upper end of the top plate (1) or the upper end of the cooperating plate (3).

3. The auxiliary device for visible light positioning testing according to claim 2, characterized in that: The collaborative board (3) includes two transparent trays (301) of the same size, with a cardboard sandwiched between the two transparent trays (301), and the cardboard having boundary markings. Two transparent trays (301) abut against the nut and the locking ring (4) respectively, and the photodetector is used for positioning by boundary marking.

4. The auxiliary device for visible light positioning testing according to claim 1, characterized in that: The top plate (1) is also provided with a connecting plate (5) at its lower end. Parallel guide rails (6) are provided on both sides of the top plate (1). The two ends of the connecting plate (5) extend into the guide rails (6). The connecting plate (5) is used to translate between the two guide rails (6). At least one of the light sources is fixed on the connecting plate (5).

5. The auxiliary device for visible light positioning testing according to claim 4, characterized in that: The length direction of the guide rail (6) is longitudinal; the length direction of the connecting plate (5) is transverse. The collaborative plate (3) has one or more inlay slots (302) in both the longitudinal and transverse directions. The inlay slots (302) are located on the edge of the collaborative plate (3). A first level ruler is installed in the inlay slots (302) to express the horizontal state of the collaborative plate (3) in both the longitudinal and transverse directions. A second horizontal ruler (601) is provided below the guide rail (6), and a third horizontal ruler (602) parallel to the connecting plate (5) is provided at the lower end of the top plate (1). The third horizontal ruler is set on the edge of the top plate (1).

6. The auxiliary device for visible light positioning testing according to claim 4, characterized in that: The light array is marked by a coordinate system engraved on the lower end of the top plate (1), which is used to determine the spacing between the light sources; the connecting plate (5) is made of transparent material, and the connecting plate (5) is arrayed with scales, which are used to correspond to the coordinate system, and the connecting plate (5) drives at least one light source to translate.

7. The auxiliary device for visible light positioning testing according to claim 4, characterized in that: The guide rail (6) is detachably installed at the lower end of the top plate (1). The guide rail (6) is provided with a slider (7) that is slidably connected. The two ends of the connecting plate (5) are connected to the slider (7). The two ends of the guide rail (6) are provided with a socket (603) that communicates with the inner cavity. The socket (603) is used to insert the slider (7).

8. The auxiliary device for visible light positioning testing according to claim 7, characterized in that: The guide rail (6) has a guide groove (604) below it, and the slider (7) has a mounting hole corresponding to the guide groove (604). The mounting hole is used to insert the guide rod (8), and the size of the guide rod (8) is smaller than the width of the guide groove (604).

9. The auxiliary device for visible light positioning testing according to claim 1, characterized in that: The column (2) is provided with a scale, and the lower end of the column (2) is provided with a connecting column (201). The lower end of the connecting column (201) is provided with a connecting hole, which is used for external contact with the ground support.

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