CN220915332U

CN220915332U - Camera test system

Info

Publication number: CN220915332U
Application number: CN202322184002.8U
Authority: CN
Inventors: 薛志凌; 李凯琦; 陈艳军
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2023-08-14
Filing date: 2023-08-14
Publication date: 2024-05-07
Anticipated expiration: 2033-08-14

Abstract

The utility model discloses a camera test system, which comprises: the turntable is used for placing the test calibration disc; the driving motor is connected with the turntable and used for driving the turntable to rotate; the camera is used for collecting images of the test calibration disc; the electric control device is connected with the driving motor and used for supplying power to the test system and controlling the working state of the driving motor. By adopting the camera testing system, the camera is used for collecting the images of the test calibration disc on the rotating turntable to realize the camera test, so that the load and the driving power of the driving motor are reduced, and the deployment difficulty and the cost of the testing system are further reduced.

Description

Camera test system

Technical Field

The utility model relates to the technical field of camera test systems, in particular to a camera test system.

Background

In the related art, pictures are attached to a roller in the existing camera testing system, the camera tests the camera by collecting the pictures on the rotating roller, but the rotating speed of the roller adopted by the testing system is low, the requirement of the camera for measuring a high-speed target cannot be met, as the roller is adopted in the testing system, the load of a driving motor is increased, the power of the driving motor is increased, the motor is powered by three-phase alternating current, the deployment difficulty of the testing system is increased, the cost of the testing system is increased, the effect of collecting images by the camera can only be judged in the testing system, the quantification index of the camera cannot be evaluated, the testing range is narrow, and the application requirement of track business cannot be met.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a camera testing system, by which camera testing is achieved by capturing images of a test calibration disc on a rotating turntable, so as to reduce load and driving power of a driving motor, and further reduce deployment difficulty and cost of the testing system.

In order to solve the above-mentioned problems, an embodiment of a first aspect of the present utility model provides a camera test system, including: the turntable is used for placing the test calibration disc; the driving motor is connected with the turntable and used for driving the turntable to rotate; the camera is used for collecting images of the test calibration disc; the electric control device is connected with the driving motor and used for supplying power to the test system and controlling the working state of the driving motor.

According to the camera test system, the camera acquires the images of the test calibration disc when the driving motor drives the turntable to rotate to realize the test of the camera, and compared with the mode that the camera in the existing camera test system tests the camera by acquiring the images on the rotating drum, the camera acquires the images of the test calibration disc on the rotating turntable to test the camera, so that the images are not carried by the rotating drum any more, the load and the driving power of the driving motor are reduced, and the deployment difficulty and the deployment cost of the test system are further reduced.

In some embodiments, the camera test system further comprises: the first base is used for fixing the driving motor and the turntable; the second base is arranged at intervals with the first base, and the second base is used for bearing the camera.

In some embodiments, a lifting mechanism is provided on the second mount for adjusting a camera optical center height of the camera.

In some embodiments, the second base is spaced from the first base a distance greater than a diameter of the turntable.

In some embodiments, the test calibration disc is a circular calibration disc, a pointer calibration disc, or a wheel calibration disc.

In some embodiments, the electronic control device comprises: the control device is connected with the driving motor and used for supplying power to the system and controlling the working state of the driving motor; the data processing device is connected with the camera and used for quantitatively analyzing the images acquired by the camera to determine a camera test result.

In some embodiments, the data processing device is connected to the camera through a portal.

In some embodiments, the control device comprises: the power supply connector is used for being connected with a power supply; the power supply conversion unit is connected with the power supply connection port and is used for carrying out power supply conversion on the power supply; the motor connector is connected with the power supply connector and is used for connecting the driving motor to supply power for the driving motor; the main control unit is connected with the power supply conversion unit and the motor connector and used for controlling the working state of the driving motor.

In some embodiments, the motor connection port includes a first signal connection terminal, a second signal connection terminal, a third signal connection terminal, and a fourth signal connection terminal; the main control unit comprises: the driving signal output end is connected with the first signal connection end and is used for outputting a direction control signal to control the rotation direction of the driving motor; the rotating speed signal output end is connected with the second signal connection end and is used for outputting a rotating speed control signal to control the rotating speed of the driving motor; the brake signal output end is connected with the third signal connection end and is used for outputting a stop control signal to control the driving motor to stop running; and the feedback signal receiving end is connected with the fourth signal connecting end and is used for receiving the state signal fed back by the driving motor.

In some embodiments, the control device further comprises: and the prompting unit is used for prompting the power supply.

In some embodiments, the data processing device is connected to the control device, and the data processing device is configured to receive a user-selected test parameter and send the user-selected test parameter to the control device, where the user-selected test parameter includes at least a camera test mode and/or a motor control parameter.

In some embodiments, serial communication is used between the data processing device and the control device.

In some embodiments, the control device further comprises: the USB interface is used for connecting the data processing equipment; the serial communication unit is connected with the main control unit and is used for carrying out serial communication with the data processing equipment.

In some embodiments, the drive motor is a 24V brushless dc motor.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a block diagram of a camera testing system according to one embodiment of the utility model;

FIG. 2 is a schematic diagram of a camera testing system according to one embodiment of the utility model;

FIG. 3 is a schematic illustration of a test calibration disc according to one embodiment of the utility model;

FIG. 4 is a schematic view of a test calibration disc according to another embodiment of the utility model;

FIG. 5 is a schematic view of a test calibration disc according to another embodiment of the utility model;

FIG. 6 is a schematic diagram of a control device according to one embodiment of the utility model;

Fig. 7 is a flowchart of a control process of the control apparatus according to one embodiment of the present utility model.

Reference numerals:

A turntable 1; a drive motor 2; an electric control device 3; a camera 4; a first base 5; a lifting mechanism 6; a control device 7; a data processing device 8; a power supply connection port 71; a power supply conversion unit 72; a motor connection port 73; a main control unit 74; a presentation unit 75; a USB interface 76; a serial port communication unit 77; a first signal connection 731; a second signal connection 732; a third signal connection 733; a fourth signal connection 734; a driving signal output terminal 741; a rotational speed signal output 742; a brake signal output 743; a feedback signal receiving terminal 744.

Detailed Description

Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.

In order to solve the above problems, an embodiment of a first aspect of the present utility model provides a camera test system, with which a camera is used to collect images of a test calibration disc on a rotating turntable to realize a camera test, so as to reduce the load and driving power of a driving motor, and further reduce the deployment difficulty and cost of the test system.

A camera test system 1000 according to an embodiment of the present utility model is described below with reference to fig. 1, as shown in fig. 1, including: a turntable 1, a driving motor 2, an electric control device 3 and a camera (not shown in the figure).

The turntable 1 is used for placing a test calibration disc; as shown in fig. 2, a driving motor 2 is connected with the turntable 1 and is used for driving the turntable 1 to rotate; the camera 4 is used for collecting images of the test calibration disc, and the electric control device 3 is connected with the driving motor 2 and used for supplying power to the test system and controlling the working state of the driving motor 2.

Specifically, in the existing camera test system, pictures are attached to a roller, a camera 4 tests the camera 4 by collecting pictures on the rotating roller, but the rotating speed of the roller adopted by the test system is low, the requirement of the camera 4 for measuring a high-speed target cannot be met, and as the roller is adopted in the test system, the load and the power of a driving motor 2 are increased, so that the motor needs three-phase alternating current to supply power, the deployment difficulty of the test system is increased, the cost of the test system is increased, in order to solve the problem, the test calibration disc is borne by a rotary disc 1, the camera 4 collects images of the test calibration disc when the rotary disc 1 is driven by the driving motor 2 to realize the test of the camera 4, so that the pictures are not borne by the rotating roller any more, and the test calibration disc is borne by the rotary disc 1, the application reduces the load and driving power of the driving motor 2, and further reduces the deployment difficulty and cost of the test system, that is, the test calibration disk is attached to the turntable 1, the electric control device 3 controls the working state of the driving motor 2, wherein the working state can be the rotation speed, rotation direction and running or stop of the driving motor 2, and the working state is not limited by the working state, for example, the electric control device 3 controls the driving motor 2 to run at a constant speed, the driving motor 2 drives the turntable 1 to rotate, the camera 4 collects the image of the test calibration disk, thereby completing the test of the camera 4, compared with the prior camera test system in which the camera 4 collects the image of the test calibration disk on the turntable 1 to test the camera 4 by collecting the image on the rotary drum, thereby reducing the load and driving power of the driving motor 2, and further reduces the deployment difficulty and cost of the test system.

According to the camera test system 1000 of the utility model, when the driving motor 2 drives the turntable 1 to rotate, the camera 4 collects images of the test calibration disk to realize the test of the camera 4, and compared with the mode that the camera 4 tests the camera 4 by collecting images on the rotating drum in the conventional camera test system, the camera 4 collects images of the test calibration disk on the rotating turntable 1 to test the camera 4, so that the images are not carried by the rotating drum any more, the load and the driving power of the driving motor 2 are reduced, and the deployment difficulty and the cost of the test system are further reduced.

In the embodiment, the material of the turntable 1 may be 1mm acrylic plate.

In some embodiments, as shown in fig. 2, the camera test system 1000 further includes: a first base 5 and a second base.

Wherein the first base 5 is used for fixing the driving motor 2 and the turntable 1; the second base is arranged at intervals from the first base 5, and the second base is used for bearing the camera 4. Thereby, the first mount 5 and the second mount are arranged at intervals and in parallel, so that the lens of the camera 4 can be parallel to the plane of the turntable 1, and furthermore, the first mount 5 and the second mount can be arranged at intervals and in parallel.

In some embodiments, as shown in fig. 2, a lifting mechanism 6 is disposed on the second base, and the lifting mechanism 6 is used to adjust the height of the optical center of the camera 4, so that the optical center of the camera 4 and the center of the turntable 1 are on the same horizontal line.

In some embodiments, the second mount is spaced from the first mount 5 by a distance greater than the diameter of the turntable 1 such that the camera 4 optical center is spaced from the turntable 1 by a horizontal distance greater than the diameter of the turntable 1, e.g., the camera 4 optical center is spaced from the turntable 1 by a horizontal distance 1.5 times the diameter of the turntable 1.

In addition, the turntable 1 has a diameter slightly larger than the width of the camera 4.

In some embodiments, based on the calibration principle of the camera 4 and the basic theory of multiple geometric views, a test calibration disk based on a rotation test method is designed, the test calibration disk is a circular calibration disk, a pointer type calibration disk or a wheel type calibration disk, the test calibration disk is a circular calibration disk in fig. 3, the test calibration disk is a pointer type calibration disk in fig. 4, and the test calibration disk is a wheel type calibration disk in fig. 5, and the camera test system 1000 can measure internal parameters of the camera 4, including focal length and distortion parameters of the camera 4 by using the circular calibration disk, and the camera test system 1000 can measure offset degrees when the moving speed of the pointer type calibration disk and the line frequency of the camera 4 are not matched by using the pointer type calibration disk. Therefore, the camera 4 acquires images of the test calibration disc on the rotating turntable 1 to obtain a camera 4 test result, and quantitative analysis of the camera 4 test result can be realized.

In some embodiments, the electronic control device 3 comprises: a control device 7 and a data processing device 8.

Wherein the control device 7 is connected with the driving motor 2 and is used for supplying power to the system and controlling the working state of the driving motor 2; the data processing device 8 is connected to the camera 4 for quantitative analysis of the images acquired by the camera 4 to determine the test results of the camera 4.

Specifically, the existing camera test system performs artificial analysis on the image collected by the camera 4 to obtain a test result of the camera 4, only the basic judgment of whether the image is stretched or compressed can be judged, but in the application, the data processing device 8 of the camera test system 1000 performs quantitative analysis on the image collected by the camera 4 to obtain the test result of the camera 4, that is, the test calibration disk on the turntable 1 is driven to rotate according to the working state of the driving motor 2, wherein the working state can be the rotating speed and the rotating direction of the driving motor 2, the rotating speed of the driving motor 2 can be constant speed or variable speed, the rotating speed can be any speed value or 50m/s above 15m/s, wherein 50m/s is the planned highest running speed of the current cloud, the camera 4 collects the image of the test calibration disk, and the data processing device 8 performs quantitative analysis on the image collected by the camera 4 to obtain the test result of the camera 4. Therefore, the camera 4 acquires the images of the test calibration disc on the rotating turntable 1 to obtain the test result of the camera 4, quantitative analysis of the test result of the camera 4 can be realized, and the rotating speed of the driving motor 2 is not limited, so that the measuring range of the system is improved.

In some embodiments, the data processing device 8 is connected to the camera 4 through a network port, that is, the camera 4 sends the image collected by the camera 4 to the data processing device 8 through the network port, so that the data processing device 8 performs quantitative analysis on the image collected by the camera 4 to obtain a test result of the camera 4.

In some embodiments, as shown in fig. 6, the control device 7 comprises: a power supply connection port 71, a power supply conversion unit 72, a motor connection port 73, and a main control unit 74.

Wherein, the power connection port 71 is used for accessing the power supply; the power conversion unit 72 is connected to the power connection port 71 and is configured to perform power conversion on the power supply; the motor connection port 73 is connected with the power supply connection port 71 and is used for connecting the driving motor 2 to supply power for the driving motor 2; the main control unit 74 is connected to the power conversion unit 72 and the motor connection port 73, and is used for controlling the working state of the driving motor 2. That is, if the electronic control device 3 uses 24V for power supply and the main control unit 74 uses 5V for power supply, the power supply conversion unit 72 can convert the power supply from 24V to 5V to supply power to the main control unit 74 through the power supply connection port 71, and the power supply supplies power to the driving motor 2 through the power supply connection port 71 and the motor connection port 73. The power supply source supplies voltage to the camera 4 through the power supply connection port 71 at 24V. In addition, the capacitances C1 and C2 near the supply voltage function as filtering power supply.

In some embodiments, as shown in fig. 6, the motor connection port 73 includes a first signal connection 731, a second signal connection 732, a third signal connection 733, and a fourth signal connection 734. The main control unit 74 includes: a driving signal output terminal 741, a rotation speed signal output terminal 742, a brake signal output terminal 743, and a feedback signal receiving terminal 744.

Wherein the driving signal output terminal 741 is connected to the first signal connection 731 for outputting a direction control signal to control the rotation direction of the driving motor 2; the rotation speed signal output end 742 is connected to the second signal connection end 732, and is configured to output a rotation speed control signal to control the rotation speed of the driving motor 2; the brake signal output terminal 743 is connected to the third signal connection terminal 733, and is configured to output a stop control signal to control the driving motor 2 to stop operating; the feedback signal receiving terminal 744 is connected to the fourth signal connection terminal 734, and is configured to receive the status signal fed back by the driving motor 2. That is, the main control unit 74 outputs a direction control signal through the driving signal output terminal 741, and the driving motor 2 receives the direction control signal through the first signal connection 731 to control the rotation direction of the driving motor 2, wherein the direction control signal may be a level signal, for example, to control the motor to rotate forward when the level signal is a high level signal, and conversely to control the motor to rotate backward when the level signal is a low level signal; the main control unit 74 outputs a rotation speed control signal through the rotation speed signal output end 742, the driving motor 2 receives the rotation speed control signal through the second signal connection end 732 to control the rotation speed of the driving motor 2, wherein the rotation speed control signal can be a PWM signal, the rotation speed of the driving motor 2 is in direct proportion to a PWM duty ratio, the duty ratio is 0% to 100% adjustable, and the frequency of the PWM signal is 500Hz; the main control unit 74 outputs a stop control signal through the brake signal output end 743, wherein the stop control signal may be a stop signal, and the driving motor 2 receives the stop control signal through the third signal connection end 733 to control the driving motor 2 to stop running; the driving motor 2 outputs a status signal through the fourth signal connection terminal 734, where the status signal may be a speed feedback pulse signal of the driving motor 2, and eight square waves of the speed feedback pulse signal represent one revolution of the motor, and the main control unit 74 receives the status signal fed back by the driving motor 2 through the feedback signal receiving terminal 744.

In some embodiments, as shown in fig. 6, the control device 7 further comprises: a prompting unit 75. Wherein, the prompt unit 75 is used for performing power prompt. The indication unit 75 may be a plurality of indication lamps to indicate power supply through the indication lamps, for example, the indication lamps control the first indication lamp to be turned on when the power supply is 24V and the indication lamps control the second indication lamp to be turned on when the power supply voltage is 5V.

In some embodiments, the data processing device 8 is connected to the control device 7, the data processing device 8 being configured to receive user-selected test parameters and to send the user-selected test parameters to the control device 7, wherein the user-selected test parameters comprise at least a camera 4 test mode and/or motor control parameters.

Specifically, the existing camera test system performs manual analysis on the image collected by the camera 4 to obtain a test result of the camera 4, only the basic judgment of whether the image is stretched or compressed can be judged, but the data processing device 8 of the camera test system 1000 in the application performs quantitative analysis on the image collected by the camera 4 to obtain the test result of the camera 4, that is, the test software of the user at the PC (personal computer, computer) end inputs the user selection test parameters, the data processing device 8 receives the user selection test parameters, the camera 4 test mode in the user selection test parameters is the camera 4 internal parameter calibration mode or the continuous image collection mode, the motor control parameter in the user selection test parameters is the rotation speed of the driving motor 2, wherein the rotation speed can be a constant speed or rotation speed strategy, the rotation speed strategy can be a variable speed strategy, the method comprises the steps that a circular calibration disc corresponding to an internal reference calibration mode and a continuous image acquisition mode of a camera 4 is selected, namely the circular calibration disc is flatly attached to a rotary disc 1, a test program is started in PC end test software, a control device 7 tests according to received user selection test parameters, at the moment, a driving motor 2 starts to rotate, after the motor rotation speed is stable, the control device 7 sends an image acquisition instruction to the camera 4, the camera 4 starts to acquire images of the circular calibration disc, the images of the circular calibration disc received by the test software are obtained and displayed through operation of an image acquisition processing algorithm, a camera 4 test result corresponding to the mode is obtained, a button for ending the test in the test software is clicked, at the moment, the driving motor 2 stops rotating, and the camera 4 stops image acquisition of the circular calibration disc, so that the internal reference of the camera 4 can be measured when the circular calibration disc is selected. In addition, the continuous image acquisition mode needs to set the time for acquiring images. The camera 4 test results output in the camera 4 internal parameter calibration mode are camera 4 internal parameters and distortion parameters.

When a user selects a test mode of matching the line frequency of the camera 4 with a moving object in the test parameters to be the linear array camera 4 or a dynamic shift test mode, a corresponding pointer type calibration disk in the mode is selected, namely the pointer type calibration disk is flatly attached to the turntable 1, a rotation speed strategy in a motor control parameter in the dynamic shift test mode can be a speed change strategy, namely motor rotation speeds at different moments are different, so that a scene of simulating object speed change is provided, a test program is opened in PC end test software, the control device 7 tests according to the received user selection test parameters, at the moment, the driving motor 2 starts to rotate, after the motor rotation speed is stable, the control device 7 sends an image acquisition instruction to the camera 4, the camera 4 starts to acquire images of the pointer type calibration disk, the images of the pointer type calibration disk received by the test software are obtained through a graph acquisition processing algorithm, the camera 4 test result corresponding to be displayed, and a button after the test in the test software is clicked, at the moment, the driving motor 2 stops rotating, the camera 4 stops image acquisition of the circular calibration disk, and therefore the pointer type calibration disk can be measured when the pointer type calibration disk is selected, the image shift speed and the offset of the camera 4 is not matched. The test result of the camera 4 output in the linear array camera 4 line frequency and moving object matching test mode is output offset value, and the test result of the camera 4 output in the dynamic moving test mode is variance of offset.

When the user selects the simple test mode of the camera 4 in the test parameters, the corresponding wheel-shaped calibration disc in the simple test mode is selected, namely the wheel-shaped calibration disc is flatly attached to the rotary disc 1, the sector areas of the wheel-shaped calibration disc are equal to the fixed moving speed of the tested object, a test program is opened in PC end test software, the control equipment 7 tests according to the received user selection test parameters, at the moment, the driving motor 2 starts to rotate, after the motor rotation speed is stable, the control equipment 7 sends an image acquisition instruction to the camera 4, the camera 4 starts to acquire the image of the wheel-shaped calibration disc, the test result of the camera 4 corresponding to the wheel-shaped calibration disc in the internal reference calibration mode of the camera 4 is displayed in test software, and a button for ending the test in the test software is not needed to be clicked in the internal reference calibration mode of the camera 4.

In the use process of the camera test system 1000 in the application, a user only needs to adjust the position of the camera 4 and input test parameters to obtain the test result of the camera 4, so that the usability of the test system is improved, and quantized parameter indexes are provided in the test result of the camera 4, so that the camera test system 1000 can test the performance of the camera 4 and also can obtain the quantized parameter indexes of the camera 4.

In addition, the user selected test parameters and the test results of the camera 4 can be saved in a local path in the PC side test software.

It should be noted that, when the PC end runs the image acquisition processing algorithm, the stored image acquired by the camera 4 is read, the image acquired by the camera 4 is processed by the algorithm to output the test result of the camera 4, and the time for storing the image should be not less than 5 seconds. The image acquisition processing algorithm comprises the following processing steps of firstly, reading and storing the camera 4 to acquire an image, and secondly, reversing the image. And thirdly, carrying out edge processing on the image. And fourthly, extracting pixel coordinates. If the circular calibration disc is used, the images of the circular calibration disc are eight longitudinal straight lines and are symmetrically distributed along the Y axis, and the pixel coordinates of the intersection point of the X axis of the four left straight lines are extracted; or when the pointer type calibration disk is used, the left half part of the image is extracted, as shown in fig. 4, the intersection points A, B, C and D of the transverse line and the circular ring of the pointer type calibration disk are in the imaging plane of the camera 4 and are not in the same horizontal plane, and the coordinates of the four points are extracted. And fifthly, taking the extracted coordinate points into a camera 4 model. And a sixth step of outputting a test result of the camera 4.

In some embodiments serial communication is employed between the data processing device 8 and the control device 7, i.e. the data processing device 8 sends the user selected test parameters to the control device 7 via serial communication.

In some embodiments, as shown in fig. 6, the control device 7 further comprises: a USB interface 76, and a serial communication unit 77. Wherein the USB interface 76 is used for connecting the data processing device 8. The serial communication unit 77 is connected to the main control unit 74, and is used for serial communication with the data processing device 8, that is, the control device 7 receives the user-selected test parameters sent by the data processing device 8 through the USB interface 76 or the serial communication unit 77.

Further, the control device 7 is connected to the PC terminal through a USB interface 76, and the control device 7 communicates with the PC terminal through the USB interface 76 and a serial communication unit 77.

In an embodiment, master control unit 74 separates analog ground from signal ground, which is coupled through resistor R3. The main control unit 74 may be an Arduino Nano, and an ATmega328P single-chip microcomputer is adopted in the main control unit.

In some embodiments, the camera test system 1000 adopts the turntable 1, the load carried by the driving motor 2 is small and high torque is not required, so the driving motor 2 can be a 24V brushless DC motor, the rotating speed of the 24V brushless DC motor can be 8000 rpm and the rated power can be 40W, the method is not limited, the 24V brushless DC motor has a hall speed measuring function, thereby the accurate control of the rotating speed of the driving motor 2 can be realized, the system test precision is further improved, and the camera test system 1000 in the application adopts a low-power brushless DC motor, the system cost is greatly reduced, in addition, the use condition of equipment is reduced due to the adoption of 24V DC safety voltage, the electrical safety of the system is improved, the size and weight of the camera test system 1000 are reduced, and the convenience in use and the convenience in deployment of the equipment are improved.

The control process of the control device 7 in the present utility model is illustrated below with reference to fig. 7, and the following is a specific matter.

Step S1, starting.

Step S2, obtaining user selection test parameters.

Step S3, determining whether the rotation speed of the driving motor 2 is constant, if so, executing step S10, otherwise executing step S4.

And S4, loading a rotating speed strategy.

And S5, acquiring a target speed under a rotating speed strategy.

In step S6, the control device 7 controls the rotation speed of the driving motor 2 according to a rotation speed strategy through a PID (Proportion INTEGRAL DIFFERENTIAL) algorithm.

Step S7, the rotation speed of the driving motor 2 is read.

Step S8, a rotation speed control signal such as a control PWM value for controlling the rotation speed of the drive motor 2 is output.

In step S9, the control device 7 transmits an image acquisition instruction to the camera 4.

In step S10, the driving motor 2 drives the turntable 1 to rotate at a constant speed with the target speed.

In step S11, the control device 7 controls the rotation speed of the driving motor 2 at a constant speed by a PID (Proportion INTEGRAL DIFFERENTIAL) algorithm, and performs step S7.

Step S12 outputs a rotation speed control signal such as a control PWM value that controls the rotation speed of the drive motor 2.

Step S13, the rotation speed of the drive motor 2 is waited for to stabilize.

In step S14, the control device 7 transmits an image acquisition instruction to the camera 4.

Step S15, ends.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A camera testing system, comprising:

The turntable is used for placing the test calibration disc;

The driving motor is connected with the turntable and used for driving the turntable to rotate;

The camera is used for collecting images of the test calibration disc;

The electric control device is connected with the driving motor and is used for supplying power to the test system and controlling the working state of the driving motor; the first base is used for fixing the driving motor and the turntable;

The second base is arranged at intervals with the first base, and the second base is used for bearing the camera.

2. The camera testing system of claim 1, wherein a lifting mechanism is provided on the second base, the lifting mechanism being configured to adjust a camera optical center height of the camera.

3. The camera testing system of claim 1, wherein the second mount is spaced from the first mount a distance greater than a diameter of the turntable.

4. The camera test system of claim 1, wherein the test calibration disk is a circular calibration disk, a pointer calibration disk, or a wheel calibration disk.

5. The camera testing system of any of claims 1-4, wherein the electronic control device comprises:

The control device is connected with the driving motor and used for supplying power to the system and controlling the working state of the driving motor;

The data processing device is connected with the camera and used for quantitatively analyzing the images acquired by the camera to determine a camera test result.

6. The camera testing system of claim 5, wherein the data processing device is coupled to the camera through a portal.

7. The camera test system of claim 5, wherein the control device comprises:

The power supply connector is used for being connected with a power supply;

The power supply conversion unit is connected with the power supply connection port and is used for carrying out power supply conversion on the power supply;

The motor connector is connected with the power supply connector and is used for connecting the driving motor to supply power for the driving motor;

The main control unit is connected with the power supply conversion unit and the motor connector and used for controlling the working state of the driving motor.

8. The camera test system of claim 7, wherein the motor connection port comprises a first signal connection port, a second signal connection port, a third signal connection port, and a fourth signal connection port;

the main control unit comprises:

The driving signal output end is connected with the first signal connection end and is used for outputting a direction control signal to control the rotation direction of the driving motor;

The rotating speed signal output end is connected with the second signal connection end and is used for outputting a rotating speed control signal to control the rotating speed of the driving motor;

The brake signal output end is connected with the third signal connection end and is used for outputting a stop control signal to control the driving motor to stop running;

And the feedback signal receiving end is connected with the fourth signal connecting end and is used for receiving the state signal fed back by the driving motor.

9. The camera testing system of claim 7, wherein the control device further comprises:

And the prompting unit is used for prompting the power supply.

10. The camera test system of claim 7, wherein the data processing device is coupled to the control device, the data processing device configured to receive user-selected test parameters and send the user-selected test parameters to the control device, wherein the user-selected test parameters include at least a camera test mode and/or motor control parameters.

11. The camera test system of claim 10, wherein serial communication is employed between the data processing device and the control device.

12. The camera testing system of claim 11, wherein the control device further comprises:

The USB interface is used for connecting the data processing equipment;

The serial communication unit is connected with the main control unit and is used for carrying out serial communication with the data processing equipment.

13. The camera testing system of claim 1, wherein the drive motor is a 24V dc brushless motor.