Visual precision verification device and method for camera platform and application

Abstract

The invention relates to a camera platform visual precision verification device and method and application, and relates to the technical field of visual system correction. The device comprises a rotary table, a sample seat, a quick connection mechanism and a sample fixing mechanism, wherein the sample seat is arranged on the rotary table, the quick connection mechanism is arranged between the sample seat and the rotary table, and the sample fixing mechanism comprises a pair of sample positioning frames correspondingly connected to preset positions on the sample seat. By arranging the sample fixing magnet on the sample seat to be matched with the sample positioning frame, rapid and stable clamping of a sample can be achieved, accurate positioning of the sample is ensured, meanwhile, angle fine adjustment can be conducted on the sample seat by arranging the rotary table and the coupling to be matched, and accurate adjustment and control of the angle of the sample can be achieved by arranging the angle indicator. The problems that in the prior art, when a binocular vision system carries out three-dimensional positioning and multi-angle observation, the sample precision is insufficient, the observation angle is limited, the cost is high, and operation is inconvenient are solved on the whole.

Description

Technical Field

[0001] The present invention relates to the technical field of visual system correction, and in particular to a camera platform visual accuracy verification device, method and application. Background Art

[0002] Since the camera is a planar observation, the observed samples are usually placed parallel to the camera observation surface. However, if the camera is used for three-dimensional positioning (such as binocular camera positioning), when testing or verifying its performance, samples with high known accuracy that can measure depth, angle or other three-dimensional information at one time are often required. The existing common visual observation verification methods are to use professional optical instruments for verification, or to use expensive spatial positioning systems for verification, which are not feasible for fast and low-cost verification.

[0003] At the same time, if a binocular camera platform is used for large-angle oblique observation, usually due to the certain angle between the two cameras, when one camera can barely observe, the other camera often observes that the sample is almost perpendicular to the camera, or even can only see the back of the sample. At this time, if binocular printed samples are used, the consistency of the front and back data of the sample cannot be guaranteed. When using mechanical stereo samples, it is usually difficult to ensure that the processing accuracy is higher than the recognition accuracy of high-precision cameras (thus making the test meaningless).

[0004] Therefore, traditional visual accuracy verification methods rely on professional optical instruments or expensive spatial positioning systems. These devices and methods face limitations such as insufficient sample accuracy, difficulty in ensuring observation consistency, high cost, and complex operation when performing large-angle observation and three-dimensional positioning in binocular camera systems. Summary of the invention

[0005] Purpose of the invention: In view of the above shortcomings, the present invention provides a camera platform visual accuracy verification device, and further provides a visual accuracy verification method implemented by using the visual accuracy verification device, and also proposes the application of binocular visual recognition that can be achieved by using the device or method, so as to solve the above problems existing in the prior art.

[0006] A first aspect of the present invention provides a camera platform visual accuracy verification device, the device comprising a turntable, a sample holder, a quick connection mechanism and a sample fixing mechanism; The sample seat is arranged on the turntable, and a quick connection mechanism for quickly connecting the sample seat and the turntable is arranged between the sample seat and the turntable. The sample fixing mechanism includes a pair of sample positioning frames correspondingly connected to predetermined positions on the sample seat, and a first sample fixing magnet is installed on one side of the sample positioning frame, and a second sample fixing magnet adapted to the first sample fixing magnet and used for installing and fixing the sample is correspondingly arranged on a side of the sample positioning frame away from the first sample fixing magnet.

[0007] In a further embodiment of the first aspect, the quick-connect mechanism includes a quick-connect seat, a quick-connect magnet, and a quick-connect fixing magnet; Among them, the quick-connect seat is arranged between the turntable and the sample seat, the quick-connect magnet is installed at a predetermined position on the sample seat, and the quick-connect fixing magnet is installed at a predetermined position on the quick-connect seat and is arranged corresponding to the quick-connect magnet, for adsorbing and fixing the quick-connect seat and the sample seat.

[0008] In a further embodiment of the first aspect, the quick-connect mechanism further includes a magnet installation slot and a magnet embedded slot; Among them, the magnet installation groove is opened on the side of the sample seat close to the turntable and is adapted to the quick-connect magnet for installing the quick-connect magnet. The magnet embedded groove is opened at a predetermined position on the quick-connect seat and is arranged corresponding to the magnet installation groove for installing the quick-connect fixed magnet.

[0009] In a further embodiment of the first aspect, the quick-connect mechanism further comprises a plurality of swivel mounting holes; Among them, a plurality of swivel seat mounting holes are correspondingly opened on the quick-connect seat and the swivel table, and are used to fix the quick-connect seat and the swivel table, and to press the quick-connect fixing magnet.

[0010] In a further embodiment of the first aspect, the sample fixing mechanism further includes a pair of magnet fixing parts and a pair of sample placement parts; Among them, a pair of magnet fixing parts are correspondingly opened on a pair of sample positioning frames, and are used to respectively stick a pair of first sample fixing magnets. A pair of sample placing parts are correspondingly arranged on a side of a pair of sample positioning frames away from the magnet fixing parts. The pair of sample placing parts are arranged as a plane, and the first sample fixing magnet and the second sample fixing magnet cooperate to make the sample fit the plane of the sample placing part and fix it.

[0011] In a further embodiment of the first aspect, a positioning mechanism is further provided between the sample holder, the quick-connect mechanism and the turntable, and the positioning mechanism includes a plurality of positioning grooves, a plurality of positioning pin holes, a plurality of positioning pins and a plurality of positioning plug-ins; Among them, several positioning grooves are correspondingly opened at predetermined positions on the quick-connect seat, several positioning nail holes are correspondingly opened on the inner walls of the positioning grooves and the turntable, and positioning pins are arranged in the positioning nail holes for positioning. Several positioning plug-ins are correspondingly installed on the side of the sample seat close to the turntable and are arranged corresponding to the several positioning nail holes, and are used to cooperate with the positioning grooves, positioning nail holes and positioning pins to install and position the turntable, sample seat and quick-connect mechanism.

[0012] In a further embodiment of the first aspect, the present application further comprises a coupling; The coupling is installed at a predetermined position on the turntable, and is used to cooperate with the turntable, the sample holder and the quick-connect mechanism to fine-tune the angle of the sample, as well as to connect an external drive device.

[0013] In a further embodiment of the first aspect, the present application further comprises an angle indicator; Wherein, the angle indicator is installed at a predetermined position on the turntable to display the fine-tuning angle value.

[0014] In addition, the second aspect of the present application also proposes a camera platform visual accuracy verification method, the visual accuracy verification method comprising the following steps: Building a visual accuracy verification device as disclosed in the first aspect and calibrating and calibrating it; According to the usage scenario to be simulated, adjust the line thickness of the sample, and select a sample that meets the first preset condition (because it mainly simulates binocular observation of space objects, a plane object that is nearly parallel to the camera observation direction is used as an equivalent substitute. For the simulation of real objects, if a thickness of 0.1mm is required, the corresponding imaging angle is, for example, 20°, then a thickness of 0.1 / sin(30°)=0.2mm is required. In addition, the observed object meets the expected measurement form, including but not limited to straight-line distance measurement, arc measurement, multi-segment line measurement, complex curve measurement, angle measurement, etc.); Adjust the selected sample to a posture that meets the second preset condition (the placement posture of the sample corresponds to the thickness of the sample line (related to the expected working scene of the camera). For example, when focusing on measuring the depth distance of the camera platform, this sample must ensure that its features cover the depth of field range of the camera when the camera is imaging, and the sample plane is nearly parallel to the camera observation direction (but not completely parallel, because the camera cannot normally observe the features on the plane sample when they are completely parallel); when focusing on the measurement of plane positioning, this sample must ensure that it covers more imaging positions, that is, the sample plane is nearly perpendicular to the camera observation direction, so as to facilitate sampling at different positions), and clamp it on the sample holder using a magnet; Place the sample at the observation position of the camera and perform accuracy verification operation.

[0015] In a further embodiment of the second aspect, after selecting a sample that meets the preset conditions, the produced sample can also be two-dimensionally measured and cut to a preset size (there is a minimum size requirement for clamping, which cannot be too small; this clamping allows a certain external overhang, but in order to avoid the overhang causing the flatness of the observation position to be pulled and lose accuracy, the sample should not be too large. Some samples may have multiple observation objects printed on them. To ensure ease of use, they do not need to be cut, but if the flatness of the observation area is damaged after installation, it is best to cut them to the clamping size).

[0016] In a further embodiment of the second aspect, after placing the sample at the observation position of the camera and performing the accuracy verification operation, the following operating steps can also be taken: read the initial angle of the turntable, adjust the turntable to the specified angle, and perform verification again; replace the sample and perform the next round of verification.

[0017] In a further embodiment of the second aspect, the process of placing the sample at the observation position of the camera and performing the accuracy verification operation specifically includes: S1. Clamp the prepared series of samples on the sample holder using a sample fixing mechanism and place it at the camera observation position; S2, read the initial angle of the turntable; S3, by adjusting the angle of the turntable, obtaining the measurement data of the sample at different angles, and extracting key features; S4. Measure the length, angle and curvature of the sample according to the extracted key features; compare the theoretical value with the measured value to obtain the measurement error value; S5. Repeat steps S3 and S4 to measure the sample at different angles to obtain multiple measurement samples, obtain the measurement error values ​​under different samples, calculate the average value and standard deviation, and confirm whether the accuracy is qualified.

[0018] In addition, the third aspect of the present application also proposes the application of the visual accuracy verification device disclosed in the first aspect and the camera platform visual accuracy verification method disclosed in the second aspect in observing samples with depth features. The camera platform visual accuracy verification device and method are used to calibrate and verify the accuracy of the camera platform, and the depth distance, angle or other three-dimensional information of the sample is measured at one time using the camera platform after calibration and accuracy verification.

[0019] Beneficial effects: The present invention relates to a camera platform visual accuracy verification device, method and application. By arranging a sample fixing magnet on the sample holder in cooperation with a sample positioning frame, the sample can be clamped quickly and stably, and the precise positioning of the sample can be ensured. At the same time, by arranging a turntable and a coupling in cooperation, the angle of the sample holder can be fine-tuned, and by setting an angle indicator, the precise adjustment and control of the sample angle can be achieved. Overall, the problems of insufficient sample accuracy, limited observation angles, high cost and inconvenient operation that exist in the prior art when the binocular vision system performs three-dimensional positioning and multi-angle observation are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the explosion structure of the whole device of the present invention.

[0021] Figure 2 It is a schematic diagram of the overall assembly structure of the device of the present invention.

[0022] Figure 3Schematic diagram of the structure of the sample holder in the device.

[0023] Figure 4 It is a structural schematic diagram of the quick connector in the device.

[0024] Figure 5 It is a schematic diagram of the structure of the transfer table in the device.

[0025] Figure 6 It is the effect diagram of the use of the device of the present invention.

[0026] Figure 7 Schematic diagram of hair simulation curve in the embodiment.

[0027] The reference numerals in the figure are: 1. turntable, 2. coupling, 3. sample seat, 4. quick-connect mechanism, 401. quick-connect seat, 402. magnet mounting groove, 403. quick-connect magnet, 404. magnet embedded groove, 405. quick-connect fixed magnet, 406. turntable mounting hole, 5. sample fixing mechanism, 501. sample positioning frame, 502. magnet fixing part, 503. first sample fixing magnet, 504. sample placement part, 505. second sample fixing magnet, 6. positioning mechanism, 601. positioning groove, 602. positioning pin hole, 603. positioning pin, 604. positioning plug-in, 7. angle indicator. DETAILED DESCRIPTION

[0028] In the following description, a large number of specific details are provided to provide a more thorough understanding of the present invention. However, it is apparent to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features well known in the art are not described.

[0029] The applicant believes that existing visual accuracy verification methods rely on professional optical instruments or expensive spatial positioning systems. These devices and methods face limitations such as insufficient sample accuracy, difficulty in ensuring observation consistency, high cost, and complex operation when performing large-angle observation and three-dimensional positioning in binocular camera systems.

[0030] To this end, the applicant proposes a camera platform visual accuracy verification device, such as Figure 1-Figure 6 As shown, the device includes a turntable 1, a sample holder 3, a quick-connect mechanism 4, a sample fixing mechanism 5, a positioning mechanism 6, a coupling 2 and an angle indicator 7.

[0031] Among them, the sample seat 3 is vertically arranged on the turntable 1, the coupling 2 is installed at a predetermined position on one side of the turntable 1, and is used to cooperate with the turntable 1, the sample seat 3 and the quick-connect mechanism 4 to fine-tune the angle of the sample, and an external drive device. The angle indicator 7 is installed at a predetermined position on one side of the turntable 1 and is connected to the coupling 2, and is used to display the current rotation angle of the turntable 1 and provide accurate fine-tuning angle values.

[0032] like Figure 1-Figure 3 As shown, the sample fixing mechanism 5 is disposed on the sample holder 3 , and includes a pair of sample positioning frames 501 , a pair of first sample fixing magnets 503 , a pair of second sample fixing magnets 505 , a pair of magnet fixing portions 502 and a pair of sample placing portions 504 .

[0033] Among them, a pair of sample positioning frames 501 are correspondingly connected to predetermined positions on the sample holder 3, a first sample fixing magnet 503 is installed on one side of the sample positioning frame 501, a second sample fixing magnet 505 is arranged on a side of the sample positioning frame 501 away from the first sample fixing magnet 503 and is adapted to the first sample fixing magnet 503, and is used to install and fix the sample, a pair of magnet fixing parts 502 are correspondingly opened on the pair of sample positioning frames 501, and are used to respectively stick a pair of first sample fixing magnets 503, a pair of sample placing parts 504 are correspondingly arranged on one side of the pair of sample positioning frames 501 away from the magnet fixing parts 502, and a pair of sample placing parts 504 are set to a plane, and the first sample fixing magnet 503 and the second sample fixing magnet 505 cooperate to make the sample fit the sample placing part 504 plane and fix it.

[0034] In the present application, as the basic part of the sample support, the sample positioning frame 501 is installed on the sample holder 3 to determine the precise position of the sample and fix the sample at a predetermined position on the sample positioning frame 501 through the magnetic adsorption of the first sample fixing magnet 503 and the second sample fixing magnet 505.

[0035] The sample seat 3 is used to cooperate with the sample fixing mechanism 5 to fix the sample, and the turntable 1 is used to cooperate with the coupling 2 and the sample seat 3 to fine-tune the angle of the sample. A table fixing hole is provided under the turntable 1, which can be used to cooperate with screws to stably fix the entire device to the table. The magnet fixing part 502 provided on the sample positioning frame 501 can be used to stick the first sample fixing magnet 503, and the sample can be fixed on the sample placement part 504 using an additional second sample fixing magnet 505, so that the present application can quickly clamp the sample on the sample seat 3 with a smaller and more stable clamping size.

[0036] When in use, the sample is mounted on the sample holder 3 using the sample fixing mechanism 5. The sample holder 3 is positioned and adsorbed on the turntable 1 by the quick connection mechanism 4 cooperating with the positioning mechanism 6. The angle of the sample can be fine-tuned by manually adjusting the coupling 2 of the turntable 1, and the fine-tuned angle reading can be read through the angle indicator 7. The end of the coupling 2 can be externally connected to a driving device such as a motor to automatically adjust the angle, thereby increasing the convenience and accuracy of the adjustment.

[0037] In addition, the sample mentioned in the present application is made of optically transparent material with simulated marks of visual observation targets printed on it. Due to its transparent characteristics, it can simulate targets with spatial structures and assume that it is under a visual system. Not only can the visual accuracy be tested by observing the sample in the forward direction, but also the camera can be set up on both sides of the sample to observe through the transparent surface of the sample. Since the accuracy of plane-made samples is easier to control than that of three-dimensional samples, the function of high-precision three-dimensional samples can be achieved by replacing high-precision two-dimensional samples for sufficient visual accuracy verification.

[0038] like Figure 1-Figure 4 As shown, the quick connection mechanism 4 is arranged between the sample holder 3 and the turntable 1, and is used for quick connection of the sample holder 3 and the turntable 1. The quick connection mechanism 4 includes a quick connection seat 401, a quick connection magnet 403, a quick connection fixed magnet 405, a magnet mounting groove 402, a magnet embedded groove 404 and several turntable mounting holes 406.

[0039] Among them, the quick-connect seat 401 is arranged between the turntable 1 and the sample seat 3, the quick-connect magnet 403 is installed at a predetermined position on the sample seat 3, the quick-connect fixing magnet 405 is installed at a predetermined position on the quick-connect seat 401 and is arranged corresponding to the quick-connect magnet 403, and is used to adsorb and fix the quick-connect seat 401 and the sample seat 3, the magnet mounting groove 402 is opened on the side of the sample seat 3 close to the turntable 1 and is adapted to the quick-connect magnet 403, and is used to install the quick-connect magnet 403, the magnet embedded groove 404 is opened at a predetermined position on the quick-connect seat 401 and is arranged corresponding to the magnet mounting groove 402, and is used to install the quick-connect fixing magnet 405, and several turntable mounting holes 406 are correspondingly opened on the quick-connect seat 401 and the turntable 1, and are used to fix the quick-connect seat 401 and the turntable 1, and to press the quick-connect fixing magnet 405.

[0040] In the present application, a magnet mounting groove 402 is provided at the middle position of one side of the sample seat 3 away from the sample fixing mechanism 5, and the quick-connect magnet 403 can be fixed in the magnet mounting groove 402 by means of screws or the like, or the quick-connect magnet 403 can be connected to the magnet mounting groove 402 by magnetic adsorption, and a magnet pre-embedded groove 404 is provided under the quick-connect seat 401 for installing a quick-connect fixing magnet 405, and the direction of the magnetic pole can be controlled to ensure adsorption. After the quick-connect fixing magnet 405 is installed in the magnet pre-embedded groove 404, the quick-connect seat 401 can be fixed to the turntable 1 by means of the turntable mounting hole 406 in cooperation with the fixing pins, and the quick-connect fixing magnet 405 can be further fixed by being clamped between the turntable 1 and the quick-connect seat 401.

[0041] like Figure 1-Figure 4 As shown, the present application also includes a positioning mechanism 6 , which is disposed between the sample holder 3 , the quick-connect mechanism 4 and the turntable 1 , and includes a plurality of positioning grooves 601 , a plurality of positioning pin holes 602 , a plurality of positioning pins 603 and a plurality of positioning plug-ins 604 .

[0042] Among them, several positioning grooves 601 are correspondingly opened at predetermined positions on the quick-connect seat 401, several positioning pin holes 602 are correspondingly opened on the inner walls of the positioning grooves 601 and on the turntable 1, and positioning pins 603 for positioning are arranged in the positioning pin holes 602. Several positioning plug-ins 604 are correspondingly installed on the side of the sample seat 3 close to the turntable 1 and are correspondingly arranged with the several positioning pin holes 602, and are used to cooperate with the positioning grooves 601, the positioning pin holes 602 and the positioning pins 603 to install and position the turntable 1, the sample seat 3 and the quick-connect mechanism 4.

[0043] In the present application, two positioning plug-ins 604 are provided, and the two positioning plug-ins 604 are respectively located on both sides of the magnet mounting groove 402. The two positioning plug-ins 604 have high internal and external dimensional accuracy and are used for positioning. A positioning groove 601 is provided on the quick connector 401, which has high processing accuracy. A positioning pin hole 602 is provided in the positioning groove 601, which can be used to arrange high-precision metal positioning pins 603, ensuring control accuracy while forming a high-quality match with the positioning plug-in 604, and its outer edge can also be used for rough positioning, mainly to ensure that the sample seat 3 is not easy to tip over.

[0044] During operation, when the sample holder 3 is brought close to the quick-connect holder 401, it will be automatically adsorbed due to the action of the quick-connect magnet 403 and the quick-connect fixing magnet 405. A chamfered pin can be used at the positioning plug-in 604, or an additional guide chamfer can be set at the positioning plug-in 604 or the positioning groove 601. The guide chamfer is not drawn in the figure, and only rough manual positioning is required to complete the installation under the action of the quick-connect magnet 403, the quick-connect fixing magnet 405 and the guide. Moreover, due to the characteristic that the closer the quick-connect magnet 403 and the quick-connect fixing magnet 405 are, the greater the adsorption force is, after the positioning is completed, the sample holder 3 can be reliably fixed on the quick-connect holder 401 and will not be displaced due to vibration or shaking.

[0045] When the device as a whole is in use, it is first necessary to assemble the device as a whole, and then adjust the line thickness of the sample according to the usage scenario to be simulated, select a suitable sample for production, perform two-dimensional measurement on the produced sample, or cut the sample to a suitable size, and then adjust the sample to a suitable posture, and use the sample fixing mechanism 5 to clamp the sample on the sample holder 3, and then place the sample at the observation position of the camera or binocular camera to perform accuracy verification operations. During the process, the initial angle of the turntable 1 can be read, and the turntable 1 can be adjusted to rotate to the specified angle, and verification is performed again. Finally, the sample is replaced and the next round of verification is performed.

[0046] This application addresses the technical difficulty of accurately applying samples with depth features for planar or stereoscopic vision positioning. By combining the above-mentioned features, it can ensure that the sample can be installed perpendicular to the camera, reliably arranged and can be observed simultaneously on both sides by binocular cameras with different viewing angles. At the same time, the easy arrangement and easy adjustment characteristics can achieve the specified sample changes during testing.

[0047] Based on the above technical solution, the specific working process of the present invention is as follows: first, the device is assembled according to the corresponding operating steps, and then the assembled device is calibrated, and then the calibrated device is verified and calibrated for accuracy, and finally the sample is measured using the verified and calibrated device.

[0048] During the measurement process, the angle of the turntable 1 can be adjusted to obtain measurement data for different requirements and perform key feature extraction. Based on the extracted key features, the length, angle and curvature of the sample can be measured. The above steps can be repeated to measure the sample at different angles and record the measurement data. Finally, the measured data can be analyzed and verified.

[0049] In addition, if Figure 7 As shown, taking a hair sample as an example, this embodiment specifically proposes a solution for the state perpendicular to the camera observation: Specifically, a series of samples with different radii, curves with different central angles, and straight lines with different angles in simulated space are designed and printed on transparent materials. The typical usage method is to use thin and highly transparent materials such as film boards and high-precision glass for high-precision printing.

[0050] This sample has lines of the same diameter and different central angles in the first area, and the right area corresponds to the states of each central angle (including horizontal straight lines).

[0051] The first three rows of samples correspond to different arc diameters, and the length of the horizontal line is the same as the arc diameter.

[0052] The first and last areas of the fourth row of samples are lines of the same length but different inclination angles.

[0053] The first three rows of samples are mainly used to simulate the state with spatial curves, and can be used for visual curve fitting verification, curvature calculation verification, tangent angle (relative to the reference horizontal straight line) verification, center angle measurement verification, and length measurement verification.

[0054] The fourth row of samples is mainly used to simulate the state of having a spatial straight line, and can be used for spatial straightness verification, spatial distance measurement verification, spatial straight line angle verification, etc.

[0055] When the sample is clamped on the sample holder 3, the clamping posture can be adjusted and the rotation angle can be parameterized to simulate samples in various spatial states for testing.

[0056] Since the thickness of the print is extremely small, and the camera usually has a certain depth of field, during high-precision verification, the depth of field of the camera is small, and the thickness of the print can be ignored. The thickness of the printed lines of the observed sample can be calculated based on the expected use angle (the angle between the camera and the sample) (for example, if observing at 30°, simulating a 0.1mm wide line requires 1 / sin(30°)=0.2mm), so that the image is consistent with the thickness of the simulated line.

[0057] Each sample can be printed on a different hard sheet, or printed on the same sample and then cut for use.

[0058] As above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention defined in the appended claims.

Claims

1. A camera platform visual accuracy verification device, characterized in that: include: Turntable; A sample holder, disposed on the turntable; A quick-connect mechanism, disposed between the sample holder and the turntable, for connecting the sample holder and the turntable; The sample fixing mechanism comprises a sample positioning frame connected to a predetermined position on the sample holder, wherein a first sample fixing magnet is installed on one side of the sample positioning frame, and a second sample fixing magnet adapted to the first sample fixing magnet and used for installing and fixing the sample is correspondingly arranged on a side of the sample positioning frame away from the first sample fixing magnet.

2. The camera platform visual accuracy verification device according to claim 1, characterized in that: The quick-connect mechanism comprises: A quick-connect seat, disposed between the turntable and the sample seat; A quick-connect magnet is installed at a predetermined position on the sample holder; A quick-connect fixing magnet is installed at a predetermined position on the quick-connect seat and is arranged corresponding to the quick-connect magnet, and is used to adsorb and fix the quick-connect seat and the sample seat; A magnet installation groove is provided on a side of the sample holder close to the turntable and is adapted to the quick-connect magnet and is used to install the quick-connect magnet; The magnet embedded groove is opened at a predetermined position on the quick-connect seat and is arranged corresponding to the magnet installation groove, and is used for installing the quick-connect fixing magnet.

3. The camera platform visual accuracy verification device according to claim 1, characterized in that: The sample fixing mechanism also includes: A magnet fixing part, correspondingly arranged on the sample positioning frame, for sticking a first sample fixing magnet; The sample placement part is correspondingly arranged on a side of the sample positioning frame away from the magnet fixing part. The sample placement part is arranged as a plane, and the first sample fixing magnet and the second sample fixing magnet cooperate to make the sample fit the plane of the sample placement part and fix it.

4. The camera platform visual accuracy verification device according to claim 2, characterized in that: A positioning mechanism is provided between the sample holder, the quick-connect mechanism and the turntable; The positioning mechanism comprises: A positioning groove is correspondingly provided at a predetermined position on the quick-connect seat; Positioning pin holes are correspondingly provided on the inner wall of the positioning groove and the turntable, and positioning pins for positioning are provided in the positioning pin holes; The positioning plug-in is installed on the side of the sample holder close to the turntable and is arranged corresponding to the plurality of positioning pin holes, and is used to cooperate with the positioning grooves, positioning pin holes and positioning pins to install and position the turntable, the sample holder and the quick-connect mechanism.

5. The camera platform visual accuracy verification device according to claim 1, characterized in that: Also includes: A coupling, installed at a predetermined position on the turntable, for cooperating with the turntable, the sample holder and the quick-connect mechanism to fine-tune the angle of the sample, and for externally connecting a driving device; An angle indicator is installed at a predetermined position on the turntable and is used to display the fine-tuning angle value.

6. Application of the visual accuracy verification device according to any one of claims 1 to 5 in observing samples with depth features, characterized in that: The visual accuracy verification device is used to calibrate and verify the accuracy of the camera platform, and the camera platform that has been calibrated and verified for accuracy is used to measure samples of depth distance, angle or other three-dimensional information at one time.

7. A camera platform visual accuracy verification method, characterized in that: The following steps are involved: Construct a visual accuracy verification device as described in any one of claims 1 to 5 and calibrate and calibrate it; According to the usage scenario to be simulated, adjust the line thickness of the sample and select the sample that meets the first preset condition; Adjust the selected sample to a posture that meets the second preset condition, and clamp it on the sample holder using a magnet; Place the sample at the observation position of the camera and perform accuracy verification operation.

8. The camera platform visual accuracy verification method according to claim 7, characterized in that: After selecting the sample that meets the preset conditions, it also includes: Perform two-dimensional measurement on the produced samples; cut the samples to a preset size; After placing the sample at the observation position of the camera and performing the accuracy verification operation, it also includes: Read the initial angle of the turntable, adjust the turntable to the specified angle, and perform verification again; replace the sample and perform the next round of verification.

9. The camera platform visual accuracy verification method according to claim 7, characterized in that: Placing the sample at the observation position of the camera and performing the accuracy verification operation specifically includes: S1. Clamp the prepared series of samples on the sample holder using a sample fixing mechanism and place it at the camera observation position; S2, read the initial angle of the turntable; S3, by adjusting the angle of the turntable, obtaining the measurement data of the sample at different angles, and extracting key features; S4. Measure the length, angle and curvature of the sample according to the extracted key features; compare the theoretical value with the measured value to obtain the measurement error value; S5. Repeat steps S3 and S4 to measure the sample at different angles to obtain multiple measurement samples, obtain the measurement error values ​​under different samples, calculate the average value and standard deviation, and confirm whether the accuracy is qualified.

10. The application of the camera platform visual accuracy verification method according to claim 7 in observing samples with depth features, characterized in that: The camera platform is calibrated and accuracy verified using the camera platform visual accuracy verification method, and samples of depth distance, angle or other three-dimensional information are measured at one time using the calibrated and accuracy verified camera platform.

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