Vehicle-mounted camera aging test device

Abstract

The utility model discloses a vehicle-mounted camera aging test device, which is used for being connected with an upper computer to carry out aging test on a plurality of vehicle-mounted cameras, and comprises a programmable power supply, a CANFD adapter, an HDMI divider, an IO card, a video acquisition card and a plurality of aging test circuit boards, each aging test circuit board comprises a video conversion board, a plurality of video switching modules and a plurality of current monitoring modules; the video switching module can be connected with a plurality of to-be-tested vehicle-mounted cameras at the same time, power is supplied to each to-be-tested vehicle-mounted camera through a coaxial cable, and each video switching module can select one path of video signal from m to-be-tested vehicle-mounted cameras for output. Every n video switching modules can select one path of video signals from n * m to-be-tested vehicle-mounted cameras in a cascading mode and output the video signals to the video conversion board. The programmable power supply, the CANFD adapter, the video acquisition card and the IO card are all connected with the upper computer, and the upper computer acquires aging test data of the vehicle-mounted camera to be tested through the vehicle-mounted camera aging test device and judges the aging test data.

Description

Technical Field

[0001] The present application belongs to the technical field of vehicle-mounted camera testing, and specifically refers to a vehicle-mounted camera aging testing device. Background Art

[0002] In the automotive sector, with the advancement of information technology and artificial intelligence, cameras are increasingly being used in automotive safety and autonomous driving, and the number of cameras installed on vehicles is increasing. Due to the unique characteristics of vehicles, automotive cameras have very high requirements for reliability and stability, and must undergo rigorous testing and verification before shipment. Various aging tests that simulate harsh operating environments are also mandatory.

[0003] Currently, in-vehicle HD cameras typically use coaxial cables to transmit video, power, and control signals. Existing in-vehicle HD camera burn-in equipment utilizes a decoder board. Each HD camera to be tested must be connected to the decoder board for video capture, and then video and current data are transmitted through input and output ports. However, current decoder boards can only perform burn-in tests on a maximum of 64 HD cameras at a time. This results in high costs and low efficiency for each burn-in test, making large-scale burn-in tests impractical. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the present application provides a vehicle-mounted camera aging test device that can perform aging tests on multiple vehicle-mounted cameras at the same time, and the number of vehicle-mounted cameras tested each time is far greater than 64.

[0005] The utility model provides an on-board camera aging test device, which is used to connect to a host computer to perform aging tests on a plurality of on-board cameras. The on-board camera aging test device comprises: a programmable power supply, a CANFD adapter, an HDMI splitter, an IO card, a video capture card, and a plurality of aging test circuit boards; wherein each of the aging test circuit boards comprises a video conversion board, a plurality of video switching modules, and a plurality of current monitoring modules;

[0006] The video switching module can be connected to several on-board cameras to be tested at the same time, and power can be supplied to each on-board camera to be tested through a coaxial cable. Each of the video switching modules can select one video signal from m on-board cameras to be tested for output, and every n video switching modules can select one video signal from n*m on-board cameras to be tested for output to the video conversion board through a cascaded manner;

[0007] The programmable power supply is connected to each of the current monitoring modules for supplying power to the vehicle-mounted camera to be tested;

[0008] The CANFD adapter is connected to each of the current monitoring modules and is used to receive the voltage and current data output by the current monitoring modules;

[0009] The HDMI splitter is connected to each of the video conversion boards and is used to receive the HDMI video signal output by the video conversion board;

[0010] The IO card is connected to each of the video switching modules and is used to switch the video output channel, selecting one from a plurality of vehicle-mounted cameras to be tested and outputting its video signal to the video conversion board;

[0011] The video capture card is connected to the HDMI splitter to collect the HDMI signal output by the HDMI splitter for determination by the host computer;

[0012] The programmable power supply, the CANFD adapter, the video capture card and the IO card are all connected to the host computer, and the host computer collects the aging test data of the vehicle-mounted camera to be tested through the vehicle-mounted camera aging test device and makes a judgment.

[0013] Furthermore, the aging test circuit board includes a DC power input port, a CANFD output port, an HDMI output port, a control IO port, and several camera coaxial cable interfaces;

[0014] The DC power input port is connected to the programmable power supply, the CANFD output port is connected to the CANFD adapter, the HDMI output port is connected to the HDMI splitter, and the control IO port is connected to the IO card.

[0015] Furthermore, the vehicle-mounted camera aging test device includes 6 aging test circuit boards.

[0016] Furthermore, the aging test circuit board includes 64 camera coaxial cable interfaces, and the aging test circuit board can be connected to 64 vehicle-mounted cameras to be tested at the same time.

[0017] Furthermore, each of the burn-in test circuit boards includes a primary video switching module and a plurality of secondary video switching modules;

[0018] The video conversion board is connected to the first-level video switching module, and the video conversion board is connected to the HDMI output port; the first-level video switching module is connected to all the second-level video switching modules, each of the second-level video switching modules includes several coaxial cable interfaces, and each of the coaxial cable interfaces is connected to one of the vehicle-mounted cameras to be tested; the IO port of the first-level video switching module and the IO ports of all the second-level video switching modules are connected to the control IO port.

[0019] Furthermore, the current monitoring module corresponds one-to-one to the secondary video switching module; the current monitoring module is respectively connected to several coaxial cable interfaces of the secondary video switching module.

[0020] Furthermore, each of the burn-in test circuit boards includes a primary video switching module, eight secondary video switching modules, and eight current monitoring modules;

[0021] The video conversion board is connected to the first-level video switching module, and the video conversion board is connected to the HDMI output port; the first-level video switching module is connected to all the second-level video switching modules; the IO port of the first-level video switching module and the IO ports of all the second-level video switching modules are connected to the control IO port.

[0022] Furthermore, each of the secondary video switching modules includes 8 coaxial cable interfaces, each of the aging test circuit boards includes 64 coaxial cable interfaces, and each of the coaxial cable interfaces is connected to one of the vehicle-mounted cameras to be tested; the current monitoring module is respectively connected to the 8 coaxial cable interfaces of the secondary video switching module.

[0023] Furthermore, the 64 video signals of the aging test circuit board are switched through the primary video switching module and the eight secondary video switching modules.

[0024] Furthermore, the vehicle-mounted camera aging test device performs aging detection on the vehicle-mounted camera to be tested in a polling manner, and controls the first-level video switching module and the second-level video switching module through the IO card to switch the video signal channel for video acquisition and judgment.

[0025] The beneficial effects of the utility model are:

[0026] The utility model provides a vehicle camera aging test device. By providing several aging test circuit boards, each of which can be connected to several vehicle cameras under test, each vehicle camera under test uses the aging test circuit board to perform video analysis and monitor voltage and current. The aging test circuit board then transmits the video data, along with the voltage and current data, via a CANFD adapter and an HDMI splitter. Each aging test circuit board can be switched to select a vehicle camera under test for aging testing, and its video signal is deserialized and converted into an HDMI signal. This allows aging testing of multiple vehicle cameras at once, significantly improving testing efficiency and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0028] Figure 1 This is a structural diagram of a vehicle-mounted camera aging test device provided in this embodiment.

[0029] Figure 2 This is a schematic diagram of the structure of the aging test circuit board provided in this embodiment. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0031] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0032] The disclosure below provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art will appreciate the application of other processes and / or the use of other materials.

[0033] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0034] Example 1:

[0035] The present invention provides a vehicle-mounted camera aging test device. Figure 1 As shown, the vehicle-mounted camera aging test device is mainly used to connect to a host computer and perform aging tests on multiple vehicle-mounted cameras. The vehicle-mounted camera aging test device includes: a programmable power supply, a CANFD adapter, an HDMI splitter, an IO card programmable power supply, a CANFD adapter, an HDMI splitter, an IO card, a video capture card, and multiple aging test circuit boards; each of the aging test circuit boards includes a video conversion board, multiple video switching modules, and multiple current monitoring modules.

[0036] The video switching module can be connected to several vehicle-mounted cameras to be tested at the same time, and power can be supplied to each vehicle-mounted camera to be tested via a coaxial cable. Each video switching module can select one video signal from m vehicle-mounted cameras to be tested for output, and every n video switching modules can select one video signal from n*m vehicle-mounted cameras to be tested for output to the video conversion board in a cascade manner.

[0037] Wherein, the programmable power supply is connected to the current monitoring module in each of the aging test circuit boards to power the vehicle-mounted camera to be tested. In this embodiment, the programmable power supply can also be replaced with other power supply modules, as long as they meet the requirements of the vehicle-mounted camera aging test device. This embodiment uses the programmable power supply for power supply, and the power output interface of the programmable power supply is connected to the DC power input port of each of the aging test circuit boards, thereby inputting a DC power supply to power the vehicle-mounted camera to be tested connected to the aging test circuit board. The programmable power supply is also connected to the USB interface of the host computer via a USB data cable.

[0038] The CAN FD adapter is connected to the current monitoring module in each of the burn-in test circuit boards and is used to receive the voltage and current data output by the current monitoring module. The CAN FD adapter primarily receives voltage and current data for each camera channel returned by the current monitoring module located on the burn-in test circuit board. The CAN FD adapter also connects to the host computer's network card via Ethernet and outputs the voltage and current data for each camera channel to the host computer. Based on the received data, the host computer determines the aging of the camera connected to each channel.

[0039] The HDMI splitter is connected to the video converter board in each of the burn-in test circuit boards and is used to receive the HDMI video signal output by the video converter board. The video capture card is connected to the HDMI splitter and captures the HDMI signal output by the HDMI splitter for evaluation by a host computer. The HDMI video signal output by each burn-in test circuit board is connected to the input port of the HDMI splitter. The HDMI splitter is connected to the video capture card of the host computer via an HDMI data cable. The HDMI splitter uploads the received HDMI video signal to the video capture card of the host computer, and the host computer performs an aging evaluation on the received HDMI video signal.

[0040] The IO card is connected to the video switching module in each of the burn-in test circuit boards to switch the video output channels of each of the burn-in test circuit boards. The programmable power supply, the CANFD adapter, the video capture card, and the IO card are all connected to the host computer, which collects and determines the burn-in test data of the vehicle camera to be tested through the vehicle camera burn-in test device.

[0041] Specifically, the burn-in test circuit board includes at least a DC power input port, a CANFD output port, an HDMI output port, a control IO port, and several camera coaxial cable interfaces. Each camera coaxial cable interface can be connected to a vehicle camera to be tested.

[0042] Among them, the DC power input port of each of the vehicle-mounted cameras is connected to the programmable power supply, the CANFD output ports are connected to the CANFD adapter, the HDMI output ports are connected to the HDMI splitter, and the control IO ports are connected to the IO card.

[0043] Figure 2 This is a schematic diagram of the structure of the aging test circuit board provided in this embodiment. Figure 2 As shown, the aging test circuit board also includes a primary video switching module, several secondary video switching modules, several current monitoring modules and a video conversion board.

[0044] Among them, the video conversion board is connected to the first-level video switching module, and the video conversion board is connected to the HDMI output port; the first-level video switching module is connected to all the second-level video switching modules, each of the second-level video switching modules includes several coaxial cable interfaces, and each of the coaxial cable interfaces is connected to one of the vehicle-mounted cameras to be tested; the IO port of the first-level video switching module and the IO ports of all the second-level video switching modules are connected to the control IO port.

[0045] The current monitoring modules correspond one-to-one with the secondary video switching modules and are connected to the coaxial cable interfaces of the secondary video switching modules. On each burn-in test circuit board, the current monitoring module is connected to the DC power input port and the CANFD output port. The power input of each burn-in test circuit board is fed into the coaxial cable interface of each channel through the current monitoring module and the coaxial cable circuit.

[0046] The video signal of each of the aging test circuit boards can be switched using the primary video switching module and the secondary video switching module, and then converted into an HDMI video signal through the video conversion board.

[0047] The vehicle-mounted camera aging test device performs aging detection on the vehicle-mounted camera to be tested in a polling manner, and controls the first-level video switching module and the second-level video switching module to switch video signal channels for video acquisition and judgment through the IO card.

[0048] In this embodiment, it can be set to control the IO card to switch a channel every 5 seconds to perform video acquisition and judgment of the vehicle-mounted camera to be tested.

[0049] Example 2:

[0050] This embodiment of the utility model provides a vehicle-mounted camera aging test device, which is primarily used to connect to a host computer and perform aging tests on multiple vehicle-mounted cameras. The vehicle-mounted camera aging test device includes a programmable power supply, a CANFD adapter, an HDMI splitter, an I / O card, a video capture card, and six aging test circuit boards. Each aging test circuit board includes a video converter board, several video switching modules, and several current monitoring modules. Each aging test circuit board can simultaneously connect to up to 64 vehicle-mounted cameras under test.

[0051] Wherein, the programmable power supply is connected to the current monitoring module in each of the aging test circuit boards to power the vehicle-mounted camera to be tested. In this embodiment, the programmable power supply can also be replaced with other power supply modules, as long as they meet the requirements of the vehicle-mounted camera aging test device. This embodiment uses the programmable power supply for power supply, and the power output interface of the programmable power supply is connected to the DC power input port of each of the aging test circuit boards, thereby inputting a DC power supply to power the vehicle-mounted camera to be tested connected to the aging test circuit board. The programmable power supply is also connected to the USB interface of the host computer via a USB data cable.

[0052] The CANFD adapter is connected to the current monitoring module in each of the burn-in test circuit boards and is configured to receive voltage and current data output by the burn-in test circuit boards. The CANFD adapter primarily receives voltage and current data for each camera channel returned by the current monitoring module located on the burn-in test circuit boards. The CANFD adapter is also connected to a host computer's network card via Ethernet and outputs voltage and current data for each camera channel to the host computer. Based on the received data, the host computer performs an aging assessment on the camera connected to each channel.

[0053] The HDMI splitter is connected to the video converter board in each of the burn-in test circuit boards and is used to receive the HDMI video signal output by the burn-in test circuit board. The video capture card is connected to the HDMI splitter and captures the HDMI signal output by the HDMI splitter for evaluation by a host computer. The HDMI video signal output by each burn-in test circuit board is connected to the input port of the HDMI splitter. The HDMI splitter is connected to the video capture card of the host computer via an HDMI data cable. The HDMI splitter uploads the received HDMI video signal to the video capture card of the host computer, and the host computer performs an aging evaluation on the received HDMI video signal.

[0054] The IO card is connected to the video switching module in each of the burn-in test circuit boards to switch the video output channels of each of the burn-in test circuit boards. The programmable power supply, the CANFD adapter, the video capture card, and the IO card are all connected to the host computer, which collects and determines the burn-in test data of the vehicle camera to be tested through the vehicle camera burn-in test device.

[0055] Specifically, the burn-in test circuit board includes at least a DC power input port, a CANFD output port, an HDMI output port, a control IO port, and 64 camera coaxial cable interfaces. Each camera coaxial cable interface can be connected to a vehicle camera under test, and each burn-in test circuit board can simultaneously connect to 64 vehicle cameras under test.

[0056] Among them, the DC power input port of each of the vehicle-mounted cameras is connected to the programmable power supply, the CANFD output ports are connected to the CANFD adapter, the HDMI output ports are connected to the HDMI splitter, and the control IO ports are connected to the IO card.

[0057] The aging test circuit board also includes a primary video switching module, eight secondary video switching modules, eight current monitoring modules and a video conversion board.

[0058] The video conversion board is connected to the primary video switching module, which is also connected to the HDMI output port. The primary video switching module is connected to all secondary video switching modules, each of which includes eight coaxial cable interfaces. Each burn-in test circuit board includes 64 coaxial cable interfaces, each of which is connected to one of the on-board cameras under test. The current monitoring module is connected to each of the eight coaxial cable interfaces of the secondary video switching module. The 64 video signals of the burn-in test circuit board are switched through the primary video switching module and the eight secondary video switching modules.

[0059] The IO port of the primary video switching module and the IO ports of all the secondary video switching modules are connected to the control IO port.

[0060] In each of the burn-in test circuit boards, the current monitoring module is connected to the DC power input port and the CANFD output port. The power input of each burn-in test circuit board is fed into the coaxial cable interface of each channel through the current monitoring module and the coaxial cable circuit.

[0061] The video signal of each of the aging test circuit boards can be switched using the primary video switching module and the secondary video switching module, and then converted into an HDMI video signal through the video conversion board.

[0062] The vehicle-mounted camera aging test device performs aging detection on the vehicle-mounted camera to be tested in a polling manner, and controls the first-level video switching module and the second-level video switching module to switch video signal channels for video acquisition and judgment through the IO card.

[0063] In this embodiment, it can be set to control the IO card to switch a channel every 5 seconds to perform video acquisition and judgment of the vehicle-mounted camera to be tested.

[0064] The utility model provides a vehicle camera aging test device. By providing several aging test circuit boards, each of which can be connected to several vehicle cameras under test, each vehicle camera under test uses the aging test circuit board to perform video analysis and monitor voltage and current. The aging test circuit board then transmits the video data, along with the voltage and current data, via a CANFD adapter and an HDMI splitter. Each aging test circuit board can be switched to select a vehicle camera under test for aging testing, and its video signal is deserialized and converted into an HDMI signal. This allows aging testing of up to 384 vehicle cameras under test, significantly improving testing efficiency and saving costs.

[0065] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Finally, it should be noted that, in this article, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, an element defined by the sentence "comprises a..." does not exclude the presence of other identical elements in the process, method, article or terminal device comprising the element.

[0066] The above is a detailed introduction to the vehicle-mounted camera aging test device provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A vehicle-mounted camera aging test device, used to connect to a host computer to perform aging tests on a number of vehicle-mounted cameras, characterized in that: The vehicle-mounted camera aging test device includes: a programmable power supply, a CANFD adapter, an HDMI splitter, an IO card, a video capture card, and several aging test circuit boards; wherein each of the aging test circuit boards includes a video conversion board, several video switching modules, and several current monitoring modules; The video switching module can be connected to several on-board cameras to be tested at the same time, and power can be supplied to each on-board camera to be tested through a coaxial cable. Each of the video switching modules can select one video signal from m on-board cameras to be tested for output, and every n video switching modules can select one video signal from n*m on-board cameras to be tested for output to the video conversion board through a cascaded manner; The programmable power supply is connected to each of the current monitoring modules for supplying power to the vehicle-mounted camera to be tested; The CANFD adapter is connected to each of the current monitoring modules and is used to receive the voltage and current data output by the current monitoring modules; The HDMI splitter is connected to each of the video conversion boards and is used to receive the HDMI video signal output by the video conversion board; The IO card is connected to each of the video switching modules and is used to switch the video output channel, selecting one from a plurality of vehicle-mounted cameras to be tested and outputting its video signal to the video conversion board; The video capture card is connected to the HDMI splitter to collect the HDMI signal output by the HDMI splitter for determination by the host computer; The programmable power supply, the CANFD adapter, the video capture card and the IO card are all connected to the host computer, and the host computer collects the aging test data of the vehicle-mounted camera to be tested through the vehicle-mounted camera aging test device and makes a judgment.

2. The vehicle-mounted camera aging test device according to claim 1, characterized in that: The aging test circuit board includes a DC power input port, a CANFD output port, an HDMI output port, a control IO port and several camera coaxial cable interfaces; The DC power input port is connected to the programmable power supply, the CANFD output port is connected to the CANFD adapter, the HDMI output port is connected to the HDMI splitter, and the control IO port is connected to the IO card.

3. The vehicle-mounted camera aging test device according to claim 2, characterized in that: The vehicle-mounted camera aging test device includes 6 aging test circuit boards.

4. The vehicle-mounted camera aging test device according to claim 3, characterized in that: The aging test circuit board includes 64 camera coaxial cable interfaces, and the aging test circuit board can be connected to 64 vehicle-mounted cameras to be tested at the same time.

5. The vehicle-mounted camera aging test device according to claim 4, characterized in that: Each of the burn-in test circuit boards includes a primary video switching module and a plurality of secondary video switching modules; The video conversion board is connected to the first-level video switching module, and the video conversion board is connected to the HDMI output port; the first-level video switching module is connected to all the second-level video switching modules, each of the second-level video switching modules includes several coaxial cable interfaces, and each of the coaxial cable interfaces is connected to one of the vehicle-mounted cameras to be tested; the IO port of the first-level video switching module and the IO ports of all the second-level video switching modules are connected to the control IO port.

6. The vehicle-mounted camera aging test device according to claim 5, characterized in that: The current monitoring modules correspond one to one with the secondary video switching modules; the current monitoring modules are respectively connected to several of the coaxial cable interfaces of the secondary video switching modules.

7. The vehicle-mounted camera aging test device according to claim 5, characterized in that: Each of the aging test circuit boards includes a primary video switching module, eight secondary video switching modules and eight current monitoring modules; The video conversion board is connected to the first-level video switching module, and the video conversion board is connected to the HDMI output port; the first-level video switching module is connected to all the second-level video switching modules; the IO port of the first-level video switching module and the IO ports of all the second-level video switching modules are connected to the control IO port.

8. The vehicle-mounted camera aging test device according to claim 7, characterized in that: Each of the secondary video switching modules includes 8 coaxial cable interfaces, each of the aging test circuit boards includes 64 coaxial cable interfaces, each of the coaxial cable interfaces is connected to one of the vehicle-mounted cameras to be tested; the current monitoring module is respectively connected to the 8 coaxial cable interfaces of the secondary video switching module.

9. The vehicle-mounted camera aging test device according to claim 8, characterized in that: The 64 video signals of the aging test circuit board are switched through the primary video switching module and the eight secondary video switching modules.

10. The vehicle-mounted camera aging test device according to claim 5, characterized in that: The vehicle-mounted camera aging test device performs aging detection on the vehicle-mounted camera to be tested in a polling manner, and controls the first-level video switching module and the second-level video switching module to switch video signal channels for video acquisition and judgment through the IO card.

Images