Test system for vehicle-mounted camera

Abstract

The utility model provides a test system for a vehicle-mounted camera, and an acquisition device of the test system comprises a first acquisition part and a second acquisition part which are respectively used for acquiring state parameters of a gear lever of a vehicle and state parameters of a to-be-tested camera of the vehicle; the to-be-tested camera and the gear rod are correspondingly arranged, and the state change of the gear rod causes the state change of the to-be-tested camera. A test device of the test system is in communication connection with the first acquisition part and the second acquisition part so as to receive the state parameters of the gear lever and the state parameters of the to-be-tested camera and transmit the state parameters to the calculation module. According to the test system, state parameters of a vehicle gear triggering moment and state parameters of a to-be-tested camera in response to gear triggering are acquired through a first acquisition part and a second acquisition part, and time nodes of change of the two state parameters are calculated and analyzed in a calculation module; therefore, the response time difference of the to-be-tested camera in response to the gear trigger is calculated, and the accuracy of the test result is improved.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle testing technology, and specifically relates to a testing system for vehicle-mounted cameras. Background Technology

[0002] In-vehicle cameras can capture images of the interior or exterior of the vehicle and store or transmit these images to the in-vehicle display screen, allowing the driver to be aware of the environment inside or outside the vehicle. In-vehicle cameras can function as dashcams, improve driving safety, and provide driver assistance. For example, a 360° panoramic imaging system uses four wide-angle cameras located at the front, sides, and rear of the vehicle to monitor the surrounding environment, providing the driver with a 360° panoramic view of the exterior, thereby eliminating blind spots and enhancing the driver's experience.

[0003] After a vehicle camera leaves the factory, its performance needs to be tested. Based on the test results, appropriate adjustments to the camera and related devices can be made to improve the driver's experience. For example, when the vehicle is started, it is necessary to test whether the vehicle camera can respond to the ignition signal to start normally and capture images; when the vehicle enters reverse mode, in response to the signal triggered by the reverse gear, the reversing-related cameras should immediately turn on, and the response time of the cameras relative to the gear trigger signal needs to be tested; and after the camera captures images of the vehicle's surrounding environment, the images need to be transmitted to the vehicle's display screen for display, and the delay time of the camera image display on the vehicle's display screen needs to be tested.

[0004] Current technology lacks adequate testing tools for evaluating the performance of in-vehicle cameras, relying primarily on the subjective judgment of the tester, resulting in inaccurate test results. This is particularly true when testing the camera's response time relative to the gear shift trigger signal. This requires recording video from gear shifting to the image appearing on the display, or capturing high-frequency continuous photographs, which are then imported into a computer for simple analysis of the time difference between gear shifting and the image being displayed on the vehicle's screen—essentially testing the camera's response time relative to the gear shift trigger signal. Since recording video and taking photos requires manual operation by the tester, the results are affected by human intervention, making accurate test results impossible with these methods. Utility Model Content

[0005] The purpose of this invention is to solve the problem in the prior art that when testing the response time of a camera relative to the trigger signal, there is a lack of corresponding testing tools, and the test results are affected by the tester's human operation, making it impossible to obtain accurate test results.

[0006] To address the aforementioned technical problems, this utility model discloses a testing system for vehicle-mounted cameras. The testing system includes: a data acquisition device, comprising a first acquisition component and a second acquisition component. The first acquisition component is used to acquire the state parameters of the vehicle's gear shift lever, and the second acquisition component is used to acquire the state parameters of the vehicle's camera under test. The camera under test is correspondingly positioned to the gear shift lever, and changes in the state of the gear shift lever cause changes in the state of the camera under test.

[0007] The testing device includes a communication module and a computing module that are interconnected. The testing device is connected to the first acquisition component and the second acquisition component through the communication module to receive the status parameters of the gear lever acquired by the first acquisition component and the status parameters of the camera under test acquired by the second acquisition component, and transmit them to the computing module.

[0008] Using the above technical solution, the change in the state of the gear lever causes a change in the state of the camera under test. The change in the gear lever's state refers to the gear position change when shifting between different gears. Specifically, the change in the camera under test's state is the change in its on / off state. That is, the change in the gear lever's position causes a change in whether the camera under test is on or off. For example, when the gear lever is shifted from another gear to reverse, the rearview camera is activated in response to the reverse gear engagement signal. There is a time difference between the gear shift triggering moment and the corresponding change in the state of the camera under test. Therefore, by using the first and second acquisition components to collect the state parameters of the vehicle's gear lever and the camera under test during their respective state changes, the collected gear lever state parameters reflect the time point of the gear lever's state change, and the collected camera under test state parameters reflect the time point of the camera under test's state change. The communication module receives the status parameters of the gear shift lever and the camera under test, and transmits them to the calculation module. The calculation module analyzes these two status parameters to calculate the response time difference between the camera under test and the gear shift trigger. The timing of the status changes acquired by the first and second acquisition components is more accurate, and further calculations by the calculation module refine the results. Throughout the testing process, the acquisition and testing devices eliminate the influence of human operation, improving the accuracy of the test results.

[0009] According to another specific embodiment of the present invention, the test system for vehicle-mounted cameras disclosed in this embodiment of the present invention includes a first acquisition component including a laser beam detector, which is correspondingly arranged with a gear shift lever, and the receiving end of the laser beam detector is communicatively connected to a communication module; the gear shift lever is arranged between the transmitting end and the receiving end of the laser beam detector, and when the gear shift lever is in reverse gear, it is located in the optical path of the laser beam detector.

[0010] Using the above technical solution, the change in the state of the gear lever corresponds to the shifting of the gear lever to different positions during gear shifting. By setting the gear lever between the transmitter and receiver of the laser beam and corresponding to the reverse gear position, when the laser beam is turned on, the transmitter emits a laser to the receiver. When the gear lever is shifted from other gears to the reverse gear position, the transmitter, gear lever, and receiver of the laser beam are on the same straight line. The gear lever is located in the optical path of the laser beam and interrupts the light received by the receiver, preventing the receiver from receiving the laser beam. The voltage signal of the receiver will change, and the moment when the voltage signal of the receiver changes is the moment when the gear lever is triggered to reverse. Therefore, receiving the parameter information of the disappearance of the laser signal at the receiver through the communication module is equivalent to receiving the state parameter of the gear lever being engaged in the reverse gear position collected by the laser beam.

[0011] According to another specific embodiment of the present invention, the test system for vehicle-mounted cameras disclosed in this embodiment of the present invention includes a second acquisition component comprising a first photoelectric sensor, which is disposed on the vehicle screen and is used to acquire changes in the light on the vehicle screen. The vehicle screen is connected to the camera under test and receives and displays the signals transmitted by the camera under test.

[0012] Using the above technical solution, since the camera under test is connected to the vehicle's infotainment screen and the screen's brightness changes accordingly when the camera's state changes, the parameters of the camera's state change can be indirectly obtained by collecting the parameters of the screen's brightness change. The moment the camera responds to the reverse gear engagement can be reflected by the moment the screen is turned on and its brightness begins to change. When the screen receives the activation signal transmitted by the camera under test and displays the image signal transmitted by the camera, its brightness changes. Therefore, by setting a first photoelectric sensor on the screen, the screen's brightness change can be collected, which is equivalent to collecting the state parameters of the camera's state change. In addition, the first photoelectric sensor can convert the light change signal into a voltage signal and transmit it to the computing module via the communication module. In the computing module, the time point of the voltage signal change at the laser transmitter's receiver caused by the gear lever being engaged in reverse gear is compared and analyzed with the time point of the electrical signal change caused by the screen's brightness change, and the response time difference of the camera under test in response to the reverse gear trigger is calculated.

[0013] According to another specific embodiment of the present invention, the test system for vehicle-mounted cameras disclosed in this embodiment of the present invention uses a photoresistor as the first photoelectric sensor, which is fixedly connected to the vehicle screen through an opaque component.

[0014] Using the above technical solution, the resistance value of the photoresistor changes when it senses a change in the brightness of the vehicle's infotainment screen. Therefore, the photoresistor can convert the light signal from the screen into an electrical signal and transmit it to the computing module. By recording the time points of change in the electrical signal, the time point when the screen lights up is determined, further determining the time point when the camera under test responds to the gear shift trigger. The opaque component blocks external light, ensuring that the photoresistor accurately detects changes in the screen's brightness.

[0015] According to another specific embodiment of the present invention, the testing system for vehicle-mounted cameras disclosed in this embodiment of the present invention further includes a power supply and a display screen. The power supply is connected to a laser transmitter and a first photoelectric sensor respectively. The display screen is connected to a computing module and is used to display the status parameters of the gear lever and the status parameters of the camera under test received by the computing module.

[0016] The above technical solution uses a power supply to power the laser transmitter and the first photoelectric sensor. Furthermore, a display screen shows the status parameters of the stop lever and the camera under test received by the calculation module. This provides timely and intuitive feedback on parameter changes during the testing process to the testers, facilitating their observation of these changes and preventing the inability to promptly identify problems that could affect the accuracy of the test results if the test data is incorrect.

[0017] According to another specific embodiment of the present invention, the test system for vehicle-mounted cameras disclosed in this embodiment of the present invention further includes a wireless communication module, which transmits the state parameters of the gear lever and the state parameters of the camera under test received by the calculation module to an external processor.

[0018] By adopting the above technical solution, the status parameters of the gear lever and the camera under test received by the computing module are transmitted to an external processor. Testers can then perform further analysis, processing, and verification of the status parameters on the external processor, which facilitates subsequent development and optimization.

[0019] According to another specific embodiment of the present invention, the test system for vehicle-mounted cameras disclosed in the embodiment of the present invention further includes at least two interface units, which are respectively connected to a laser transmitter and a first photoelectric sensor.

[0020] According to another specific embodiment of the present invention, the test system for vehicle-mounted cameras disclosed in this embodiment of the present invention includes a power interface and a signal interface in each interface unit of the test device. The power interface is connected to the corresponding laser transmitter and the first photoelectric sensor via a power line; the signal interface is connected to the corresponding laser transmitter and the first photoelectric sensor via a signal line.

[0021] Using the above technical solution, the laser transmitter and the first photoelectric sensor can be connected to the power supply of the test device through the power interface and power cable, respectively, and the laser transmitter and the first photoelectric sensor can be connected to the communication module of the test device through the signal interface and signal cable, respectively.

[0022] According to another specific embodiment of the present invention, the testing system for vehicle-mounted cameras disclosed in this embodiment of the present invention further includes a housing, a switch unit, a power indicator light, a fault indicator light, and a normal status indicator light; the communication module, the computing module, and the power supply are disposed inside the housing, and the display screen, the switch unit, the power indicator light, the fault indicator light, and the normal status indicator light are disposed on the housing.

[0023] Using the above technical solution, the switching unit can control the opening and closing of the testing device, and the power indicator light can indicate the power status. If the testing device malfunctions, the fault indicator light will illuminate to alert the tester. If the testing device is working normally, the normal status indicator light will illuminate, indicating to the tester that the testing device is in a normal state and can be tested. Furthermore, the various components of the testing device are integrated into a single unit through a housing, facilitating the arrangement of the testing device.

[0024] According to another specific embodiment of the present invention, the test system for vehicle-mounted cameras disclosed in this embodiment further includes a simulated light source, and the acquisition device further includes a third acquisition component, which is used to acquire the state parameters of the simulated light source; the camera under test is also set up corresponding to the simulated light source, and the state change of the simulated light source causes the state change of the camera under test; the test device is also connected to the third acquisition component through a communication module to receive the state parameters of the simulated light source acquired by the third acquisition component and transmit them to the calculation module.

[0025] Using the above technical solution, there is a time delay in image display between the acquisition of external light parameters (start of image acquisition) and the display of the image acquired by the camera under test after it is turned on. By setting the camera under test to correspond with a simulated light source, the light from the simulated light source simulates the external light acquired after the camera under test is turned on. Therefore, the state parameters of the simulated light source acquired by the third acquisition component are equivalent to the image parameters acquired by the camera under test after it is turned on. Changes in the state of the simulated light source cause changes in the state of the camera under test. The changes in the state of the simulated light source refer to changes in the light emitted by the simulated light source. Specifically, the changes in the state of the camera under test refer to the change in the display of the image acquired by the camera under test. That is, the changes in the light emitted by the simulated light source acquired by the third acquisition component cause changes in the state of the image displayed by the camera under test. The state parameters of the simulated light source acquired by the third acquisition component are transmitted to the calculation module through the communication module. In the calculation module, the time nodes of the state parameter changes when the state of the simulated light source changes are calculated and analyzed with the time nodes of the state parameter changes when the state of the camera under test changes, thereby calculating the time delay difference in the image display of the camera under test.

[0026] The beneficial effects of this utility model are as follows:

[0027] This invention provides a testing system for vehicle-mounted cameras. The state of the camera under test changes in response to changes in the vehicle's gear shift lever. Specifically, the camera under test can determine whether to turn on or off in response to gear shifting. For example, when the gear shift lever is engaged in reverse, the camera turns on in response to the reverse gear engagement signal. There is a time difference between the gear shift triggering moment and the camera under test performing the corresponding on / off action. Therefore, the first and second acquisition components of the testing system acquire the state parameters of the vehicle's gear shift lever and the camera under test, respectively, i.e., the state parameters at the gear shift triggering moment and the state parameters of the camera under test's response. The communication module of the testing device receives these state parameters and transmits them to the calculation module. The calculation module calculates and analyzes these two state parameters to determine the response time difference of the camera under test in response to the gear shift triggering. The timing of the acquisition by the first and second acquisition components is more accurate, and the calculation module further improves the accuracy of the calculated state parameters. Throughout the testing process, the influence of human operation was eliminated through the acquisition and testing devices, improving the accuracy of the test results. Furthermore, by setting up a third acquisition component and a simulated light source, the time delay from when the camera under test starts acquiring images to when the acquired image is displayed can be measured. Attached Figure Description

[0028] Figure 1A block diagram illustrating the connection structure between the testing system for an in-vehicle camera, the camera under test, and the gear shift lever, provided in an embodiment of this utility model.

[0029] Figure 2 A schematic diagram of a specific embodiment of the testing system for vehicle-mounted cameras provided in this utility model;

[0030] Figure 3 for Figure 2 A schematic diagram showing the correspondence between different positions of the middle stop lever and the optical path of the test system;

[0031] Figure 4 A schematic diagram of the structure of the opaque component of the test system for vehicle-mounted cameras provided in this embodiment of the present invention, which fixes the photoresistor to the vehicle screen (excluding the vehicle screen);

[0032] Figure 5 A schematic diagram of the structure of the testing device for the testing system of vehicle-mounted cameras provided in this embodiment of the utility model;

[0033] Figure 6 A schematic diagram of the display interface of the test system for vehicle-mounted cameras provided in this embodiment of the present invention;

[0034] Figure 7 A schematic diagram of another specific embodiment of the testing system for vehicle-mounted cameras provided in this utility model (excluding the first acquisition component and the stop lever);

[0035] Figure 8 A schematic diagram of the structure of the third acquisition component of the test system for a vehicle-mounted camera provided in an embodiment of this utility model;

[0036] Figure 9 A test flowchart for a test system for vehicle-mounted cameras provided in an embodiment of this utility model.

[0037] Explanation of reference numerals in the attached figures:

[0038] 1. Testing system;

[0039] 10. Acquisition device; 100. First acquisition component; 101. Laser beam transmitter; 1011. Transmitter; 1012. Receiver; 1013. Optical path; 110. Second acquisition component; 111. First photoelectric sensor; 112. Opaque component; 120. Third acquisition component; 130. Wire clamping tool; 140. Transparent component;

[0040] 20. Testing device; 200. Communication module; 210. Computing module; 220. Power supply; 230. Display screen; 240. Wireless communication module; 250. Interface unit; 251. Power interface; 252. Power cord; 253. Signal interface; 254. Signal line; 260. Switch unit; 271. Power indicator light; 272. Fault indicator light; 273. Normal status indicator light; 280. Housing;

[0041] 30. Simulated light source;

[0042] 2. Gear shift lever; 3. Camera under test; 4. Vehicle infotainment screen. Detailed Implementation

[0043] Traditional rearview mirrors have blind spots during driving and parking, especially in the areas in front, behind, and to the sides of the vehicle, which are difficult to see completely. In-vehicle 360° surround view systems use multiple cameras to capture images of the vehicle's surroundings from all angles, allowing the driver to clearly see the area around the vehicle, effectively eliminating blind spots and preventing collisions caused by them.

[0044] For example, when a vehicle enters reverse mode and the gear lever is engaged in reverse, to facilitate the driver's observation of the scene behind the vehicle, eliminate blind spots, and achieve accurate parking, the rearview camera in the in-vehicle 360° panoramic imaging system captures the scene behind the vehicle and displays the scene image on the vehicle's screen, providing the driver with a reversing image. This process first requires the gear lever to be engaged in reverse. The rearview camera activates in response to the reverse gear trigger signal, begins capturing images, and transmits them to the display screen. The screen lights up at this point, indicating that the rearview camera is activated. However, due to factors such as processor performance, camera quality, data transmission speed, and software optimization, there is a response time difference between the reverse gear trigger and the screen lighting up (rearview camera activation). This time difference negatively impacts the driver's experience. Therefore, it is necessary to accurately determine the time difference between the gear shift response time and the image display time in order to take appropriate measures to reduce the camera's gear shift response time and improve the driver's experience.

[0045] However, existing technologies lack corresponding testing tools and usually rely on manual testing. The test results are affected by the tester's human operation, making it impossible to obtain accurate test results. Consequently, the performance of the vehicle processor, camera quality, data transmission speed, and software upgrades and optimizations will be affected.

[0046] To address the aforementioned issues of lacking appropriate testing tools and the inability to obtain accurate test results due to human error when testing the response time of a camera relative to a gear shift trigger signal, this invention provides a testing system for vehicle-mounted cameras. The system collects the state parameters at the moment the vehicle's gear shift is triggered and the state parameters of the camera under test responding to the gear shift trigger. It then calculates and analyzes the time points of change in these two state parameters to determine the response time difference between the camera under test and the gear shift trigger, thereby improving the accuracy of the test results.

[0047] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0048] First, the structure and principle of this testing system will be explained in general.

[0049] like Figure 1 As shown, the vehicle-mounted camera testing system 1 provided by the specific embodiment of this utility model includes a data acquisition device 10 and a testing device 20. The data acquisition device 10 includes a first data acquisition component 100 and a second data acquisition component 110. The first data acquisition component 100 of the data acquisition device 10 is used to acquire the state parameters of the vehicle's gear lever 2, and the second data acquisition component 110 is used to acquire the state parameters of the vehicle's camera 3 under test. The camera under test 3 is set up in correspondence with the gear lever 2. The state change of the gear lever 2 causes the state change of the camera under test 3. The state change of the gear lever 2 refers to the gear change when the gear lever 2 changes between different gears. At this time, the state change of the camera under test 3 is specifically the on / off state change of the camera under test 3. That is, the camera under test 3 can respond to the gear state switch of the gear lever 2 to determine whether the camera under test 3 starts to output images. For example, when the gear lever 2 is shifted from other gears to reverse (R gear), the signal of reverse gear being engaged determines to activate the rearview camera and start outputting images; when the gear lever 2 is shifted from other gears to drive gear, the signal of drive gear being engaged determines to activate the cameras on both sides of the vehicle for driving assistance. There is a time difference between the moment the gear shift lever 2 is engaged and the moment the corresponding test camera 3 changes state. Therefore, the first acquisition component 100 and the second acquisition component 110 respectively acquire the state parameters of the vehicle's gear shift lever 2 when its state changes and the state parameters of the test camera 3 when its state changes. That is, the state change of the gear shift lever 2 causes the test camera 3 to turn on or off. For example, when the gear shift lever 2 is engaged in reverse, the rearview camera is activated in response to the reverse gear engagement signal.

[0050] There is a time difference from the moment the gear shift is triggered until the corresponding state change of the camera under test 3. The state parameters of the gear shift lever 2 collected by the first acquisition component 100 can reflect the time node when the state of the gear shift lever 2 changes. The state parameters of the camera under test 3 collected by the second acquisition component 110 can reflect the time node when the state of the camera under test 3 changes. By calculating the time difference between the two time nodes, the response time difference of the camera under test 3 can be tested.

[0051] It should be noted that the first acquisition component 100 can be an OBD scanner connected to the vehicle control module, which determines the state parameters of the gear lever 2 by acquiring the gear position signal on the vehicle controller; it can also be a position sensor installed on the gear lever 2, which determines the state parameters of the gear lever 2 by the position change under different gears; or it can be a photoelectric sensor, which determines the state parameters of the gear lever 2 by the light change caused by the different states of the gear lever 2. The specific structure of the first acquisition component 100 only needs to be able to acquire the state parameters of the gear lever 2.

[0052] Furthermore, the second acquisition component 110 can be a acquisition card connected to the port of the camera under test 3, which acquires the status parameters of the camera under test 3 through the port of the camera under test 3. Alternatively, it can be a photoelectric sensor set on the vehicle screen 4, which acquires the status parameters of the camera under test 3 by acquiring the brightness change of the vehicle screen 4 caused by the status change of the camera under test 3 when it starts to output an image. The specific structure of the second acquisition component 110 only needs to be able to acquire the status parameters of the camera under test 3.

[0053] The testing device 20 includes a communication module 200 and a calculation module 210 interconnected. The testing device 20 is communicatively connected to the first acquisition component 100 and the second acquisition component 110 via the communication module 200 to receive the state parameters of the gear lever 2 acquired by the first acquisition component 100 and the state parameters of the camera under test 3 acquired by the second acquisition component 110, and transmits them to the calculation module 210. The calculation module 210 performs calculations and analyses on these two state parameters to calculate the response time difference of the camera under test 3 in response to the gear lever trigger. The timing points acquired by the first and second acquisition components 100 and 110 are more accurate, and the calculations performed by the calculation module 210 further refine the calculation results. Throughout the testing process, the acquisition device 10 and the testing device 20 eliminate the influence of human operation, improving the accuracy of the test results.

[0054] It should be noted that the communication module 200 can be a hardware device such as Bluetooth, wireless communication unit, wired serial port unit, or USB interface that can receive signals and transmit them to another device; the computing module 210 can be a hardware device with certain computing capabilities such as microcontroller (MCU) or digital signal processor (DSP).

[0055] According to another specific embodiment of this utility model, such as Figure 2 As shown, the first acquisition component 100 specifically includes a laser beam 101, which is correspondingly arranged with a stop lever 2, and the receiving end 1012 of the laser beam 101 is communicatively connected to the communication module 200; the stop lever 2 is arranged between the transmitting end 1011 and the receiving end 1012 of the laser beam 101, and when the stop lever 2 is in the reverse position, it is located in the optical path 1013 of the laser beam 101.

[0056] Specifically, the change in the state of the gear lever 2 is equivalent to shifting gears to different positions. By positioning the gear lever 2 between the emitting end 1011 and the receiving end 1012 of the laser beam transmitter 101, and corresponding to the reverse gear position, when the laser beam transmitter 101 is activated, the emitting end 1011 emits a laser beam to the receiving end 1012. When the gear lever 2 shifts from other gears to the reverse gear position, such as... Figure 3 As shown, when the gear lever 2 is at position A in the figure, it is in other gear positions. When it is switched to reverse gear (position B in the figure) in the direction of the arrow, the gear lever 2 is located in the optical path 1013 of the laser beam transmitter 101. That is, the transmitting end 1011 of the laser beam transmitter 101, the gear lever 2 and the receiving end 1012 are on the same straight line. The gear lever 2 is located in the optical path 1013 of the laser beam transmitter 101 and interrupts the light received by the receiving end 1012, so that the receiving end 1012 cannot receive the laser beam. The electrical signal of the receiving end 1012 will change. The moment when the electrical signal of the receiving end 1012 changes is the moment when the gear lever 2 is triggered to reverse. Therefore, receiving the parameter information of the disappearance of the laser signal of the receiving end 1012 through the communication module 200 is equivalent to receiving the state parameter of the gear lever 2 being engaged in reverse gear collected by the laser beam transmitter 101.

[0057] In one specific embodiment of this utility model, such as Figure 2 As shown, the second acquisition component 110 specifically includes a first photoelectric sensor 111, which is disposed on the vehicle screen 4 and used to acquire changes in light on the vehicle screen 4. The vehicle screen 4 is connected to the camera 3 under test, and receives and displays the data from the camera 3 under test. Figure 2 (Not shown in the image) The transmitted signal.

[0058] Specifically, since the camera under test 3 is connected to the vehicle screen 4 and the brightness of the vehicle screen 4 changes accordingly when the state of the camera under test 3 changes, the state change parameters of the camera under test 3 can be indirectly obtained by collecting the brightness change parameters of the vehicle screen 4. The moment when the camera under test 3 responds to the reverse gear being engaged can be reflected by the moment when the vehicle screen 4 is lit up and the brightness begins to change. When the vehicle screen 4 receives the activation signal transmitted by the camera under test 3 and displays the image signal transmitted by the camera under test 3, the brightness of the vehicle screen 4 will change. Therefore, by setting the first photoelectric sensor 111 on the vehicle screen 4, the brightness change of the vehicle screen 4 can be collected, which is equivalent to collecting the state parameters of the state change of the camera under test 3. In addition, the first photoelectric sensor 111 can also convert the light change signal into an electrical signal and transmit it to the computing module 210 through the communication module 200. In the computing module 210, the time node of the electrical signal change at the receiver 1012 of the laser beam 101 caused by the gear lever 2 being engaged in reverse gear is compared and analyzed with the time node of the electrical signal change caused by the brightness change of the vehicle screen 4, and the response time difference of the camera under test 3 in response to the reverse gear trigger is calculated.

[0059] It should be noted that the first photoelectric sensor 111 can be a sensor that can convert light signals into electrical signals, such as a photoresistor, a photodiode, or a photoelectric encoder.

[0060] When the first photoelectric sensor 111 is a photoresistor, such as Figure 4 As shown, the photoresistor is fixedly connected to the vehicle screen 4 via an opaque component 112. The opaque component 112 covers the side of the photoresistor not connected to the vehicle screen 4 (the photoresistor is not shown in the figure because it is covered by the opaque component 112), blocking other light sources and ensuring that the photoresistor only collects the brightness changes of the vehicle screen 4, thus improving the accuracy of the test. The two ends of the photoresistor are connected to the test device 20 via a power cable 252. When the photoresistor senses a brightness change in the vehicle screen 4, its resistance value changes. Therefore, the photoresistor can convert the light signal from the vehicle screen 4 into an electrical signal and transmit it to the calculation module 210. By recording the time points of the electrical signal changes, the time point when the vehicle screen 4 is lit is determined, further determining the time point when the camera under test 3 responds to the gear shift trigger. The opaque component 112 can block external light, ensuring that the photoresistor accurately detects the brightness changes of the vehicle screen 4. It should be noted that the opaque component 112 can be a dark solid colloid or a suction cup coated with a dark coating.

[0061] In one specific embodiment of this utility model, such as Figure 5 As shown, the test device 20 includes a communication module 200. Figure 5 (not shown in the image) and computing module 210 (Figure 5 (Not shown in the image) It also includes a power supply 220 and a display screen 230. The power supply 220 is connected to the laser beam transmitter 101 and the first photoelectric sensor 111 respectively. The display screen 230 is connected to the computing module 210 and is used to display the status parameters of the stop lever 2 and the status parameters of the camera 3 under test received by the computing module 210.

[0062] Specifically, power is supplied to the laser beam transmitter 101 and the first photoelectric sensor 111 via power supply 220. Furthermore, the status parameters of the stop lever 2 and the camera under test 3 received by the calculation module 210 are displayed on the display screen 230, thereby providing timely and intuitive feedback on parameter changes during the testing process to the test personnel. This facilitates the test personnel's observation of changes in status parameters. If the test data is incorrect, the test personnel will not be able to promptly identify problems during the testing process, affecting the accuracy of the test results.

[0063] For example, the display screen 230 can display the voltage signal change of the laser beam receiver 1012 when the state of the gear lever 2 changes, and the voltage signal of the second acquisition component 110 when the state of the camera under test 3 changes, such as... Figure 6 The diagram shows the voltage signal of the receiver 1012 of the laser beam transmitter 101 changing with time and the voltage signal of the second acquisition component 110 changing with time. The upper curve represents the waveform of the voltage signal of the receiver 1012 of the laser beam transmitter 101 changing with time, and the lower curve represents the waveform of the voltage signal of the second acquisition component 110 changing with time. After the optical path 1013 is interrupted, the voltage signal of the receiver 1012 of the laser beam transmitter 101 drops to zero. When the camera under test 3 is turned on in response to the reverse gear, the vehicle screen 4 is lit up, and the voltage signal of the second acquisition component 110 begins to change. Moreover, the time node at which the voltage signal of the second acquisition component 110 begins to change is later than the voltage signal change of the receiver 1012. Therefore, the response time difference of the camera under test 3 can be calculated by calculating the time difference between the voltage values ​​of the two waveforms on the display screen 230.

[0064] Furthermore, the test device 20 also includes a wireless communication module 240, which transmits the status parameters of the gear lever 2 and the camera under test 3 received by the calculation module 210 to an external processor. Testers can further analyze, process, and verify the status parameters on the external processor (e.g., a PC), which facilitates subsequent development and optimization.

[0065] Furthermore, the testing device 20 also includes at least two interface units 250, which are respectively connected to the laser beam transmitter 101 and the first photoelectric sensor 111. Each interface unit 250 includes a power interface 251 and a signal interface 253. The power interface 251 is connected to the corresponding laser beam transmitter 101 and the first photoelectric sensor 111 via a power cable 252; the signal interface 253 is connected to the corresponding laser beam transmitter 101 and the first photoelectric sensor 111 via a signal cable 254. The laser beam transmitter 101 and the first photoelectric sensor 111 can be connected to the power supply 220 of the testing device 20 via the power interface 251 and the power cable 252, respectively. The laser beam transmitter 101 and the first photoelectric sensor 111 can be connected to the communication module 200 of the testing device 20 via the signal interface 253 and the signal cable 254, respectively, for signal transmission. The signal cable 254 can be clamped onto the power cable 252 using a wire clamping tool 130.

[0066] Furthermore, the testing device 20 also includes a housing 280, a switching unit 260, a power indicator light 271, a fault indicator light 272, and a normal status indicator light 273; the communication module 200, the computing module 210, and the power supply 220 are disposed within the housing 280, while the display screen 230, the switching unit 260, the power indicator light 271, the fault indicator light 272, and the normal status indicator light 273 are disposed on the housing 280. It is understood that, as Figure 5 As shown, the wireless communication module 240 and interface unit 250 can also be mounted on the housing 280. The switch unit 260 controls the power on and off of the test device 20, and the power indicator light 271 indicates the power supply status of the power supply 220. If the test device 20 malfunctions, the fault indicator light 272 illuminates to alert the tester. If the test device 20 is working normally, the normal status indicator light 273 illuminates, indicating to the tester that the test device 20 is in a normal state and can be tested. Furthermore, the housing 280 integrates all the components of the test device 20, facilitating the arrangement of the test device 20.

[0067] Based on the aforementioned test system 1, when the first acquisition component 100 uses a laser beam transmitter 101 and the first photoelectric sensor 111 uses a photoresistor to acquire the brightness of the vehicle screen 4, the tester can perform the test through the following steps:

[0068] Set up the vehicle and test system 1 in a darkroom. Set up the laser beam 101 and the gear lever 2 accordingly. Place the photoresistor on the vehicle screen 4. Connect the interface unit 250 of the test device 20 to the transmitter 1011 and receiver 1012 of the laser beam 101 and the photoresistor respectively. Turn on the switch unit 260 of the test device 20 and check whether the display screen 230 can normally reflect the voltage value change and whether the normal status indicator 273 is lit. Also, check whether the development software on the tester's PC can be connected to the test device 20 normally. If everything is normal, the test system 1 is successfully set up and can be tested.

[0069] After confirming that everything was correct, we began testing the response time difference between the camera under test 3 and the gear shift trigger.

[0070] With the vehicle in a cold start state, after turning off and locking the vehicle, leave it idle for approximately 30 minutes. Then unlock the vehicle, get in, and start the engine. Turn on the switch unit 260 of the test device 20. After the startup animation ends, shift the gear lever 2 into reverse (R) and check the display status of the test device 20. If the display shows something similar to... Figure 6 The status indicates that the test system 1 is working properly and the response time of the camera under test 3 can be measured. After obtaining the required data, the next test is performed, and the test is repeated more than three times.

[0071] With the vehicle in a hot start state, unlock and start the engine. Engage reverse (R) for the first time, then disengage. Turn on the switch unit 260 of the test device 20, engage reverse, and check the display status of the test device. If the display shows something similar... Figure 6 The status indicates that the test system 1 is working properly and the response time of the camera under test 3 can be measured. After obtaining the required data, the next test is performed, and the test is repeated more than three times.

[0072] During testing, the status display on the test device 20 (230) can be checked to determine if the voltage fluctuation range is normal and to promptly view the response time difference to be tested. The calculation module 210 remotely transmits the status parameters to the tester's PC via the wireless communication module 240, allowing the tester to process the data on the PC.

[0073] In one specific embodiment of this utility model, based on testing the response time of the camera under test 3 in response to the gear triggering by the test system 1 provided in the above embodiment, the delay time difference of the image display of the camera under test 3 can also be tested after the camera under test 3 is turned on.

[0074] like Figure 7As shown, the test system 1 includes a data acquisition device 10 and a test device 20, and also includes a simulated light source 30. The data acquisition device 10 further includes a third data acquisition component 120, which is used to acquire the state parameters of the simulated light source 30. The camera under test 3 is also configured correspondingly to the simulated light source 30, and changes in the state of the simulated light source 30 cause changes in the state of the camera under test 3. The test device 20 is also connected to the third data acquisition component 120 via a communication module 200. Figure 7 (Not shown in the image) Communication connection: The communication module 200 is connected to the third acquisition component 120 via a power line and a signal line, and the signal line is connected to the power line via a wire clamping tool 130. The communication module 200 receives the status parameters of the analog light source 30 acquired by the third acquisition component 120 and transmits them to the calculation module 210. Figure 7 (Not shown in the image). In the calculation module 210, the state parameters of the simulated light source 30 collected by the third acquisition component 120 and the state parameters of the camera under test 3 collected by the second acquisition component 110 are calculated and analyzed, so that the delay time difference of the image display of the camera under test 3 can be calculated.

[0075] By setting the camera under test (DUT) 3 to correspond with the simulated light source 30, the light from the simulated light source 30 simulates the external light collected by the DUT 3 after it is turned on. Therefore, the state parameters of the simulated light source 30 collected by the third acquisition component 120 are equivalent to the image parameters collected by the DUT 3 after it is turned on. The state change of the simulated light source 30 causes a state change of the DUT 3. The state change of the simulated light source 30 refers to the change in the light emitted by the simulated light source 30. Specifically, the state change of the DUT 3 refers to the change in the image display collected by the DUT 3, that is, the state change of the image display of the DUT 3 caused by the change in the light emitted by the simulated light source 30 collected by the third acquisition component 120. The state parameters of the simulated light source 30 collected by the third acquisition component 120 are transmitted to the calculation module 210 through the communication module 200. In the calculation module 210, the state parameters of the simulated light source 30 and the state parameters of the DUT 3 collected by the second acquisition component 110 are calculated and analyzed to calculate the time delay difference of the image display of the DUT 3.

[0076] And, as Figure 7As shown, the second acquisition component 110 specifically includes a first photoelectric sensor 111, which is mounted on the vehicle screen 4 to collect changes in light intensity. The vehicle screen 4 is connected to the camera under test 3, receiving and displaying signals transmitted by the camera under test 3. The testing device 20 is also connected to the first photoelectric sensor 111 via a communication module 200. The communication module 200 and the first photoelectric sensor 111 are connected via a power line 252 and a signal line 254, and the signal line 254 is connected to the power line 252 via a wire clamping tool 130. The communication module 200 receives the status parameters of the camera under test 3 collected by the first photoelectric sensor 111 and transmits them to the calculation module 210.

[0077] It should be noted that the third acquisition component 120 can be a photoelectric sensor, such as a photoresistor, photodiode, or photoelectric encoder, which can convert light signals into electrical signals.

[0078] When the third acquisition component 120 is a photoresistor, the photoresistor is fixedly connected to the camera 3 under test through the light-transmitting element 140 to acquire the light from the simulated light source 30. For example... Figure 8 As shown, the photoresistor is fixedly connected to the camera under test 3 via a light-transmitting element 140. The light-transmitting element 140 is positioned between the simulated light source 30 and the camera under test 3. The light-transmitting element 140 covers the side of the photoresistor not connected to the camera under test 3, thereby fixing the photoresistor to the side of the camera under test 3 that receives light. The two ends of the photoresistor are connected to the testing device 20 via power lines. The light-transmitting element 140 can be a transparent solid colloid or a transparent suction cup.

[0079] like Figure 7 The test system 1 shown can be used to test the time delay between the start of image acquisition and the display of the image acquired by the camera under test 3 after it is turned on. The light from the simulated light source 30 is collected by a photoresistor fixedly connected to the camera under test 3 and converted into an electrical signal. The brightness change of the vehicle screen 4 caused by the display of the image acquired by the camera under test 3 on the vehicle screen 4 is collected by a photoresistor fixedly connected to the vehicle screen 4 and converted into an electrical signal. The electrical signals of the two photoresistors are transmitted to the calculation module 210. In the calculation module 210, the time nodes of the change of state parameters when the state of the simulated light source 30 changes and the time nodes of the change of state parameters when the state of the camera under test 3 changes are calculated and analyzed. Thus, the time delay between the start of image acquisition and the display of the image after the camera under test 3 is turned on can be calculated.

[0080] It is understandable that when the test device 20 also includes a power supply 220, a display screen 230, and a wireless communication module 240, the power supply 220 is also connected to the third acquisition component 120 and the first photoelectric sensor 111. The display screen 230 is also used to display the status parameters of the simulated light source 30 and the camera under test 3 received by the calculation module 210. The wireless communication module 240 of the test device 20 also transmits the status parameters of the simulated light source 30 and the camera under test 3 received by the calculation module 210 to an external processor. The third acquisition component 120 is connected to the test device 20 through another interface unit 250.

[0081] Based on the above-mentioned test system 1, when the third acquisition component 120 is a photoresistor and the first photoelectric sensor 111 is a photoresistor and acquires the brightness of the vehicle screen 4, the tester can perform the test through the following steps:

[0082] Set up the vehicle and test system 1 in a darkroom. Fix one photoresistor to the camera under test 3 through the light-transmitting part 140, and place another photoresistor on the vehicle screen 4. Connect the test device 20 to the two photoresistors, turn on the test device 20, and check whether it can normally reflect the voltage value change. If it can reflect the voltage value change, the test system 1 is successfully set up and can be tested.

[0083] Unlock and start the vehicle. Turn on the 360° surround view system, switch to the rearview camera page, turn on the test device 20, and turn on the simulated light source 30. Observe the display status of the test device 20. If the display is similar to... Figure 6 The status indicates that test system 1 is functioning normally and can measure the image delay time of the camera under test 3. After obtaining the required data, the next test will be conducted. Furthermore, all measurements of the camera under test 3 from each viewpoint must be performed at least three times.

[0084] During testing, the status display on the test device 20 (230) can be checked to determine if the voltage fluctuation range is normal and to promptly view the image delay difference to be tested. The calculation module 210 remotely transmits the status parameters to the tester's PC via the wireless communication module 240, allowing the tester to process the data on the PC.

[0085] like Figure 9The diagram shows a flowchart of testing using the test system 1 provided in the above embodiment. First, the test system 1 is set up and configured. After the test device 20 is turned on, test records are generated. The calculation module 210 wirelessly transmits the status parameter signals to the external processor. The external processor receives the code block and analyzes it. If the requirements are met, the results are recorded, analyzed, and a test report is output. If the requirements are not met but the error is small and within a reasonable range, the results are recorded, analyzed, and a test report is output. If the requirements are not met and the error is large and exceeds a reasonable range, the results are recorded, an error is reported, and the connection status of the test system 1 is checked. If no errors are found, the test system 1 is set up again for testing.

[0086] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived from the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0087] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0088] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0089] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0090] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0091] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A testing system for vehicle-mounted cameras, characterized in that, The testing system includes: The data acquisition device includes a first acquisition component and a second acquisition component. The first acquisition component is used to acquire the state parameters of the vehicle's gear shift lever, and the second acquisition component is used to acquire the state parameters of the vehicle's camera under test. The camera under test is correspondingly arranged with the gear shift lever, and the state change of the gear shift lever causes the state change of the camera under test. The testing device includes interconnected communication and computing modules; The testing device is communicatively connected to the first acquisition component and the second acquisition component through the communication module to receive the status parameters of the stop lever acquired by the first acquisition component and the status parameters of the camera under test acquired by the second acquisition component, and transmit them to the calculation module.

2. The testing system for vehicle-mounted cameras as described in claim 1, characterized in that, The first acquisition component includes a laser beam transmitter, which is correspondingly arranged with the stop lever, and the receiving end of the laser beam transmitter is communicatively connected to the communication module; the stop lever is arranged between the transmitting end and the receiving end of the laser beam transmitter, and when the stop lever is in the reverse position, it is located in the optical path of the laser beam transmitter.

3. The testing system for vehicle-mounted cameras as described in claim 2, characterized in that, The second acquisition component includes a first photoelectric sensor, which is disposed on the vehicle screen and used to acquire changes in the light on the vehicle screen. The vehicle screen is connected to the camera under test and receives and displays the signals transmitted by the camera under test.

4. The testing system for vehicle-mounted cameras as described in claim 3, characterized in that, The first photoelectric sensor is a photoresistor, which is fixedly connected to the vehicle screen through an opaque component.

5. The testing system for vehicle-mounted cameras as described in claim 3, characterized in that, The testing device also includes a power supply and a display screen. The power supply is connected to the laser transmitter and the first photoelectric sensor, respectively. The display screen is connected to the computing module and is used to display the status parameters of the stop lever and the status parameters of the camera under test received by the computing module.

6. The testing system for vehicle-mounted cameras as described in claim 5, characterized in that, The testing device also includes a wireless communication module, which transmits the status parameters of the gear lever and the status parameters of the camera under test received by the computing module to an external processor.

7. The testing system for vehicle-mounted cameras as described in claim 5, characterized in that, The testing device further includes at least two interface units, which are respectively connected to the laser transmitter and the first photoelectric sensor.

8. The testing system for vehicle-mounted cameras as described in claim 7, characterized in that, Each interface unit of the testing device includes a power interface and a signal interface. The power interface is connected to the corresponding laser transmitter and the first photoelectric sensor via a power line; the signal interface is connected to the corresponding laser transmitter and the first photoelectric sensor via a signal line.

9. The testing system for vehicle-mounted cameras as described in claim 5, characterized in that, The testing device also includes a housing, a switch unit, a power indicator light, a fault indicator light, and a normal status indicator light; the communication module, the computing module, and the power supply are disposed inside the housing, while the display screen, the switch unit, the power indicator light, the fault indicator light, and the normal status indicator light are disposed on the housing.

10. The testing system for vehicle-mounted cameras as described in any one of claims 1-9, characterized in that, The testing system also includes a simulated light source, and the acquisition device also includes a third acquisition component. The third acquisition component is used to acquire the state parameters of the simulated light source. The camera under test is also set in correspondence with the simulated light source. Changes in the state of the simulated light source cause changes in the state of the camera under test. The testing device is also connected to the third acquisition component via the communication module to receive the state parameters of the simulated light source acquired by the third acquisition component and transmit them to the calculation module.

Images