CN117789622A

CN117789622A - Test system, test device and test method of vehicle-mounted display screen

Info

Publication number: CN117789622A
Application number: CN202311825021.2A
Authority: CN
Inventors: 张舒滦
Original assignee: Fulscience Automotive Electronics Co Ltd
Current assignee: Fulscience Automotive Electronics Co Ltd
Priority date: 2023-12-27
Filing date: 2023-12-27
Publication date: 2024-03-29

Abstract

The application provides a test system, a test device and a test method of a vehicle-mounted display screen, wherein the test system comprises a test computer, an oscilloscope, a logic analyzer, a relay and a display screen to be tested, and the test computer sends a serial port instruction to the relay; the relay short-circuits the first pin and the second pin based on the serial port instruction so as to complete fault injection; the oscilloscope collects a first test result of the first pin and transmits the first test result to the test computer; the logic analyzer is used for collecting a second test result of the second pin and transmitting the second test result to the test computer; and comparing whether the first test result and the second test result are consistent with the first expected result by the test computer so as to perform automatic fault injection test of the display screen to be tested. Thus, the automatic test condition input is realized, the test result is automatically analyzed, and the test time is saved.

Description

Test system, test device and test method of vehicle-mounted display screen

Technical Field

The application relates to the technical field of vehicle-mounted display screen testing, in particular to a vehicle-mounted display screen testing system, a vehicle-mounted display screen testing device and a vehicle-mounted display screen testing method.

Background

The current main stream vehicle-mounted display screen test contents are roughly divided into an I/O interface test, a pin output logic test, a pin fault injection test (short circuit/open circuit), a power supply fluctuation test and the like. Before testing, pins to be tested are found on the schematic diagram, welding spots corresponding to the PCB are found on the schematic diagram of the test point, a signal wire is led out of the test points in a manual welding mode, a tester needs to find the signal wires to be tested from a plurality of signal wires during testing, and the signal wires are connected to corresponding testing instruments such as a logic analyzer, an oscilloscope and the like, and each signal wire is manually grounded during fault injection testing.

However, in the test method, excessive time is consumed for searching the test points and the leads due to excessive wire harnesses led out from the circuit board during the test. And moreover, the PCB is extremely easy to damage due to repeated welding, faults are introduced, and the error signal is extremely easy to be accessed due to mistakes in the searching process and the welding process.

Disclosure of Invention

In view of this, the object of the present application is to provide a test system, a test device and a test method for a vehicle-mounted display screen, wherein an automatic test can achieve a fault injection test only by connecting one end of a control relay to a display screen to be tested and connecting the other end to a test computer. When the data are analyzed or the I/O port level is detected, only one end of the oscilloscope or the logic analyzer is connected with the display screen to be tested, and the other end of the oscilloscope or the logic analyzer is connected to the test computer, so that the required test data can be obtained at the same time. All the test equipment is uniformly scheduled by the test computer, so that the automatic test condition input is realized, the test result is automatically analyzed, and the test time is saved.

In a first aspect, an embodiment of the present application provides a test system for a vehicle-mounted display screen, where the test system includes a test computer, an oscilloscope, a logic analyzer, a relay, and a display screen to be tested, where the oscilloscope, the logic analyzer, and the relay are respectively connected to the display screen to be tested in a communication manner, and the oscilloscope, the logic analyzer, and the relay are respectively connected to the test computer in a communication manner, where a first pin of an I/O to be tested in the display screen to be tested is introduced to the oscilloscope, and a second pin of a digital logic to be tested in the display screen to be tested is introduced to the logic analyzer;

the test computer is used for generating a serial port instruction and sending the serial port instruction to the relay;

the relay is used for shorting the first pin and the second pin based on the serial port instruction so as to complete fault injection;

the oscilloscope is used for collecting a first test result of the first pin and transmitting the first test result to the test computer;

the logic analyzer is used for collecting a second test result of the second pin and transmitting the second test result to the test computer;

and the test computer is used for comparing whether the first test result and the second test result are consistent with a first expected result or not so as to perform automatic fault injection test of the display screen to be tested.

Further, the test system further comprises a programmable power supply, wherein the programmable power supply is electrically connected with the test computer, the oscilloscope, the logic analysis 0, the relay and the display screen to be tested, and the test computer is in communication connection with the programmable power supply;

the programmable power supply is used for supplying power to the test computer, the oscilloscope, the logic analyzer, the relay and the display screen to be tested;

the test computer is also used for generating a power supply fluctuation instruction and sending the power supply fluctuation instruction to the programmable power supply;

the program-controlled power supply is also used for adjusting the power supply voltage provided for the display screen to be tested based on the power supply fluctuation instruction so as to finish power supply fluctuation;

the oscilloscope is used for collecting a third test result of the first pin and transmitting the third test result to the test computer;

the logic analyzer is used for collecting a fourth test result of the second pin and transmitting the fourth test result to the test computer;

and the test computer is used for comparing whether the third test result and the fourth test result are consistent with a second expected result or not so as to automatically test the power supply fluctuation of the display screen to be tested.

Further, the display screen to be tested comprises a circuit board, a vehicle-mounted display screen and a connector, wherein the circuit board is electrically connected with the vehicle-mounted display screen, and the circuit board is installed on the connector.

Further, the oscilloscope is connected with the test computer through a USB, the logic analyzer is connected with the test computer through a USB, the relay is connected with the test computer through an RS232 serial port, and the programmable power supply is connected with the test computer through an RS232 serial port.

In a second aspect, the embodiment of the application also provides a testing device for the vehicle-mounted display screen, the testing device comprises a circuit board, a vehicle-mounted display screen, a display screen flat cable, pins, an acrylic plate, a metal framework, a testing bracket and a plug-in terminal, wherein the open positions of the acrylic plate correspond to test points of the circuit board one by one; wherein,

the vehicle-mounted display screen is connected with the circuit board through the display screen flat cable, and the contact pins are contacted with test points on the circuit board through opening positions in the sub-force gram board;

the acrylic plate is arranged on the metal framework and connected to the test bracket through a hinge;

the first plug-in terminal and the second plug-in terminal are connected to the corresponding metal pins of the first acrylic plate and the second acrylic plate through wire harnesses.

In a third aspect, an embodiment of the present application further provides a test method of a vehicle-mounted display screen, where the test method is applied to the test system of a vehicle-mounted display screen, the test system includes a test computer, an oscilloscope, a logic analyzer, a relay and a display screen to be tested, the oscilloscope, the logic analyzer and the relay are respectively connected with the display screen to be tested in a communication manner, the oscilloscope, the logic analyzer and the relay are respectively connected with the test computer in a communication manner, a first pin of an I/O to be tested in the display screen to be tested is introduced to the oscilloscope, and a second pin of a digital logic to be tested in the display screen to be tested is introduced to the logic analyzer; the test method comprises the following steps:

controlling the test computer to generate a serial port instruction and sending the serial port instruction to the relay;

controlling the relay to short-circuit the first pin and the second pin based on the serial port instruction so as to complete fault injection;

controlling the oscilloscope to collect a first test result of the first pin and transmitting the first test result to the test computer;

controlling the logic analyzer to collect a second test result of the second pin, and transmitting the second test result to the test computer;

and controlling the test computer to compare whether the first test result and the second test result are consistent with a first expected result or not so as to perform automatic fault injection test of the display screen to be tested.

Further, the test system further comprises a programmable power supply, the programmable power supply is electrically connected with the display screen to be tested, and the test computer is in communication connection with the programmable power supply; the test method further comprises the following steps:

controlling the programmable power supply to supply power to the display screen to be tested;

controlling the test computer to generate a power supply fluctuation instruction, and sending the power supply fluctuation instruction to the programmable power supply;

controlling the programmable power supply to adjust the power supply voltage provided for the display screen to be tested based on the power supply fluctuation instruction so as to finish power supply fluctuation;

controlling the oscilloscope to acquire a third test result of the first pin, and transmitting the third test result to the test computer;

the logic analyzer is controlled to collect a fourth test result of the second pin, and the fourth test result is transmitted to the test computer;

and controlling the test computer to compare whether the third test result and the fourth test result are consistent with a second expected result or not so as to perform automatic power fluctuation test of the display screen to be tested.

In a fourth aspect, embodiments of the present application further provide an electronic device, including: the system comprises a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, the processor and the memory are communicated through the bus when the electronic device runs, and the machine-readable instructions are executed by the processor to execute the steps of the method for testing the vehicle-mounted display screen.

In a fifth aspect, embodiments of the present application further provide a computer readable storage medium having a computer program stored thereon, which when executed by a processor performs the steps of the method for testing an in-vehicle display screen as described above.

The test system comprises a test computer, an oscilloscope, a logic analyzer, a relay and a display screen to be tested, wherein the test computer is used for generating a serial port instruction and sending the serial port instruction to the relay; the relay is used for shorting the first pin and the second pin based on the serial port instruction so as to complete fault injection; the oscilloscope is used for collecting a first test result of the first pin and transmitting the first test result to the test computer; the logic analyzer is used for collecting a second test result of the second pin and transmitting the second test result to the test computer; and the test computer is used for comparing whether the first test result and the second test result are consistent with a first expected result or not so as to perform automatic fault injection test of the display screen to be tested.

According to the test system provided by the embodiment of the application, the automatic test can be realized by only connecting one end of the control relay to the display screen to be tested and connecting the other end of the control relay to the test computer. When the data are analyzed or the I/O port level is detected, only one end of the oscilloscope or the logic analyzer is connected with the display screen to be tested, and the other end of the oscilloscope or the logic analyzer is connected to the test computer, so that the required test data can be obtained at the same time. All the test equipment is uniformly scheduled by the test computer, so that the automatic test condition input is realized, the test result is automatically analyzed, and the test time is saved.

In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a test system for a vehicle-mounted display screen according to an embodiment of the present application;

FIG. 2 is a second schematic structural diagram of a testing system for a vehicle-mounted display screen according to an embodiment of the present disclosure;

fig. 3 is a schematic hardware structure of a testing device for a vehicle-mounted display screen according to an embodiment of the present application;

fig. 4 is a flow chart of a testing method for a vehicle-mounted display screen according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Reference numerals:

100-a test system; 110-testing a computer; 120-oscilloscopes; 130-logic analyzer; 140-relay; 150-a display screen to be tested; 160-a programmable power supply; 300-testing device; 1-a vehicle-mounted display screen; 2-pins; 3-a first acrylic plate; 4-display screen flat cable; 5-a circuit board; 6-a second acrylic plate; 7-a metal framework; 8-a first connector terminal; 9-a second connector terminal; 10-testing a bracket; 500-an electronic device; 510-a processor; 520-memory; 530-bus.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments of the present application, every other embodiment that a person skilled in the art would obtain without making any inventive effort is within the scope of protection of the present application.

First, application scenarios applicable to the present application will be described. The method and the device can be applied to the technical field of vehicle-mounted display screen testing.

Based on the above, the embodiment of the application provides a test system for a vehicle-mounted display screen, which realizes automatic test condition input, automatically analyzes test results and saves test time.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a testing system for a vehicle-mounted display screen according to an embodiment of the present application. As shown in fig. 1, the test system 100 includes a test computer 110, an oscilloscope 120, a logic analyzer 130, a relay 140 and a display screen to be tested 150, wherein the oscilloscope 120, the logic analyzer 130 and the relay 140 are respectively connected with the display screen to be tested 150 in a communication manner, the oscilloscope 120, the logic analyzer 130 and the relay 140 are respectively connected with the test computer 110 in a communication manner, a first pin of an I/O to be tested in the display screen to be tested 110 is introduced onto the oscilloscope 120, and a second pin of a digital logic to be tested in the display screen to be tested 110 is introduced onto the logic analyzer 120.

The test computer 110 is configured to generate a serial port instruction, and send the serial port instruction to the relay 140.

In the embodiment, when testing the display screen 150 to be tested, the test computer 110 first needs to edit the serial port command in advance according to the requirement of the test case, so as to control different fault injection conditions, and then send the serial port command to the relay 140.

The relay 140 is configured to short-circuit the first pin and the second pin based on the serial port instruction, so as to complete fault injection.

Here, in the implementation, the pin to be injected with the fault is introduced to the relay 140, the relay 140 is connected with the test computer 110 through the RS232 serial port, the relay 140 receives the serial port instruction sent by the test computer 110, and the first pin and the second pin are short-circuited to the power supply or the ground through the serial port instruction, so as to complete the fault injection.

The oscilloscope 120 is configured to collect a first test result of the first pin, and transmit the first test result to the test computer 110.

Here, pins of the display screen 150 to be tested, which need to be tested for I/O, are introduced to the oscilloscope 120, and the oscilloscope 120 is communicatively connected to the test computer 110 through a USB cable. In a specific implementation, the oscilloscope 120 collects a first test result of the first pin of the display screen 150 to be tested, and transmits the first test result to the test computer 110 through the USB.

The logic analyzer 130 is configured to collect a second test result of the second pin, and transmit the second test result to the test computer 110.

Here, a pin of the display screen 150 to be tested, which needs to test digital logic, is introduced to the logic analyzer 130, and the logic analyzer 130 is also connected to the test computer 110 through a USB cable in a communication manner. In a specific implementation, the logic analyzer 130 collects a second test result of the second pin of the display screen 150 to be tested, and transmits the second test result to the test computer 110 through the USB.

The test computer 110 is configured to compare whether the first test result and the second test result match with a first expected result, so as to perform an automatic fault injection test of the display screen 150 to be tested.

Here, in the implementation, after the test computer 110 receives the first test result and the second test result, whether the first test result and the second test result match with the first expected result is compared, so as to perform the fault injection automatic test of the display screen 150 to be tested, and thus, the automatic test of the display screen 150 to be tested can be completed.

Referring to fig. 2, fig. 2 is a second schematic structural diagram of a testing system for a vehicle-mounted display screen according to an embodiment of the present application. As shown in fig. 2, the test system 100 further includes a programmable power supply 160, where the test computer 110, the oscilloscope 120, the logic analyzer 130, the relay 140, and the display screen to be tested 150 are electrically connected to the programmable power supply 160, and the test computer 110 is communicatively connected to the programmable power supply 150.

The programmable power supply 160 is configured to supply power to the test computer 110, the oscilloscope 120, the logic analyzer 130, the relay 140, and the display screen to be tested 150.

Here, the whole test system is powered by the programmable power supply 160, specifically, the programmable power supply 160 supplies power to the test computer 110, the oscilloscope 120, the logic analyzer 130, the relay 140 and the display screen to be tested 150.

The test computer 110 is further configured to generate a power fluctuation command, and send the power fluctuation command to the programmable power supply 160.

Here, the test computer 110 generates a power fluctuation command and transmits the power fluctuation command to the programmable power supply 160 to control the voltage of the programmable power supply. Specifically, the programmable power supply 160 is connected to the test computer 110 through an RS232 serial port.

The programmable power supply 160 is further configured to adjust a power supply voltage provided to the display screen 110 to be tested based on the power supply fluctuation command, so as to complete power supply fluctuation.

Here, the program-controlled power supply 160 adjusts the power supply voltage supplied to the display screen 110 to be tested based on the power supply fluctuation command to complete the power supply fluctuation.

The oscilloscope is used for collecting a third test result of the first pin and transmitting the third test result to the test computer.

The logic analyzer is used for collecting a fourth test result of the second pin and transmitting the fourth test result to the test computer.

Here, for the above three steps, in implementation, the oscilloscope 120 collects the third test result of the first pin of the display screen 150 to be tested, and transmits the third test result to the test computer 110 through the USB. The logic analyzer 130 collects a fourth test result of the second pin of the display screen 150 to be tested, and transmits the fourth test result to the test computer 110 through the USB. After the test computer 110 receives the third test result and the fourth test result, it compares whether the third test result and the fourth test result are consistent with the second expected result, so as to perform the automatic power fluctuation test of the display screen 150 to be tested, and complete the automatic test of the display screen 150 to be tested.

Further, the display screen 150 to be tested includes a circuit board, a vehicle-mounted display screen and a connector, wherein the circuit board is electrically connected with the vehicle-mounted display screen, and the circuit board is mounted on the connector.

The test system of the vehicle-mounted display screen comprises a test computer, an oscilloscope, a logic analyzer, a relay and a display screen to be tested, wherein the test computer is used for generating a serial port instruction and sending the serial port instruction to the relay; the relay is used for shorting the first pin and the second pin based on the serial port instruction so as to complete fault injection; the oscilloscope is used for collecting a first test result of the first pin and transmitting the first test result to the test computer; the logic analyzer is used for collecting a second test result of the second pin and transmitting the second test result to the test computer; and the test computer is used for comparing whether the first test result and the second test result are consistent with a first expected result or not so as to perform automatic fault injection test of the display screen to be tested.

Referring to fig. 3, fig. 3 is a schematic hardware structure diagram of a testing device for a vehicle-mounted display screen according to an embodiment of the present application. As shown in fig. 3, the test apparatus 300 includes: the vehicle-mounted display screen 1, the contact pin 2, the first acrylic plate 3, the second acrylic plate 6, the display screen flat cable 4, the circuit board 5, the metal framework 7, the first connecting terminal 8, the second connecting terminal 9 and the test support 10. Wherein, the open pore positions of the first acrylic plate 3 and the second acrylic plate 6 are in one-to-one correspondence with the test points of the circuit board 5.

Specifically, according to the embodiment provided in the application, as shown in fig. 3, the part 1 is a vehicle-mounted display screen, the part 4 is a display screen flat cable, the part 5 is a circuit board of a display screen to be tested, and the vehicle-mounted display screen 1 is connected with the circuit board 5 through the display screen flat cable 4 and is used for testing whether the display and touch of the vehicle-mounted display screen 1 are normal. In the test preparation stage, the parts 3 and 6 are acrylic plates, the part 2 is a pin, and the positions of openings of the upper acrylic plate 3 and the lower acrylic plate 6 are customized according to the test points of the circuit board 5, so that the openings of the upper acrylic plate 3 and the lower acrylic plate 6 are opposite to the test points of the circuit board 5, and the pin 2 is inserted into the corresponding small holes of the acrylic plates 3 and the lower acrylic plate 6 on the two sides of the circuit board 5, so that the pin 2 can be contacted with the corresponding test points.

The part 7 is a metal framework for fixing an upper acrylic plate and is connected to a part 10 test support through a hinge. During testing, the metal framework of the part 7 can be lifted upwards, then the circuit board 5 is placed on the second acrylic plate 6, after the soft state, the metal framework 7 is closed, the circuit board 5 can be clamped, and the required test point is led out through the metal contact pin 2. The part 8 and the part 9 are plug terminals and are connected to the pins 2 corresponding to the acrylic plates 3 and 6 through wire harnesses, so that the work of leading out test points is finished. Thus, the corresponding pins of the socket terminals 8 and 9 are connected to the corresponding test equipment, so that the test work can be completed. When different projects are tested, the corresponding acrylic plates are replaced without replacing the wiring harness connection of the testing equipment, so that the trouble of manually finding wires is avoided. Meanwhile, as the contact pin is used for contacting the test point, the potential damage of the manual welding wire to the test PCB is avoided.

Thus, according to the testing device provided by the application, the contact pin is accurately positioned, manual welding is not needed, the welding wire of each test point is needed to be manually welded in the prior art, the circuit board damaged by the falling of the welding signal wire or the falling of the welding pad caused by the falling of the signal wire is reduced, the operation is simple, the time is saved, the detection signal can be rapidly positioned, the original technology needs to find out in each signal wire, if the signal wire falls, the test point corresponding to the schematic diagram needs to be found again, the tool is stable in connection, the test is accurate, and the error finding condition of the test point caused by the manual welding is also reduced. The test point is led out by using the combination of the acrylic plate and the contact pin, so that the damage of the welding wire harness to the circuit board is avoided, meanwhile, the acrylic plate is movably mounted on the test bench, and the test item can be quickly replaced by replacing the acrylic plate of the corresponding item. Test bench uses standard connector to connect test point that draws, makes things convenient for each test equipment to connect pencil

Referring to fig. 4, fig. 4 is a schematic flow chart of a testing method for a vehicle-mounted display screen provided by an embodiment of the present application, where the testing method is applied to a testing system for a vehicle-mounted display screen provided by an embodiment of the present application, the testing system includes a testing computer, an oscilloscope, a logic analyzer, a relay and a display screen to be tested, the oscilloscope, the logic analyzer and the relay are respectively in communication connection with the testing computer, a first pin of an I/O to be tested in the display screen to be tested is introduced onto the oscilloscope, and a second pin of a digital logic to be tested in the display screen to be tested is introduced onto the logic analyzer. As shown in fig. 4, the test method includes:

s401, controlling the test computer to generate a serial port instruction, and sending the serial port instruction to the relay;

s402, controlling the relay to short-circuit the first pin and the second pin based on the serial port instruction so as to complete fault injection;

s403, controlling the oscilloscope to collect a first test result of the first pin, and transmitting the first test result to the test computer;

s404, controlling the logic analyzer to collect a second test result of the second pin, and transmitting the second test result to the test computer;

s405, controlling the test computer to compare whether the first test result and the second test result are consistent with a first expected result or not so as to perform automatic fault injection test of the display screen to be tested.

Further, the test system further comprises a programmable power supply, wherein the programmable power supply is electrically connected with the test computer, the oscilloscope, the logic analyzer, the relay and the display screen to be tested, and the test computer is in communication connection with the programmable power supply; the test method further comprises the following steps:

i: controlling the programmable power supply to supply power to the test computer, the oscilloscope, the logic analyzer, the relay and the display screen to be tested;

II: controlling the test computer to generate a power supply fluctuation instruction, and sending the power supply fluctuation instruction to the programmable power supply;

III: controlling the programmable power supply to adjust the power supply voltage provided for the display screen to be tested based on the power supply fluctuation instruction so as to finish power supply fluctuation;

IV: controlling the oscilloscope to acquire a third test result of the first pin, and transmitting the third test result to the test computer;

v: the logic analyzer is controlled to collect a fourth test result of the second pin, and the fourth test result is transmitted to the test computer;

VI: and controlling the test computer to compare whether the third test result and the fourth test result are consistent with a second expected result or not so as to perform automatic power fluctuation test of the display screen to be tested.

Referring to fig. 5, fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application. As shown in fig. 5, the electronic device 500 includes a processor 510, a memory 520, and a bus 530.

The memory 520 stores machine-readable instructions executable by the processor 510, and when the electronic device 500 is running, the processor 510 communicates with the memory 520 through the bus 530, and when the machine-readable instructions are executed by the processor 510, the steps of the method for testing a vehicle-mounted display screen in the method embodiment described in fig. 4 may be executed, and a specific implementation manner may refer to the method embodiment and will not be described herein.

The embodiment of the present application further provides a computer readable storage medium, where a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the steps of the method for testing a vehicle-mounted display screen in the method embodiment shown in fig. 4 may be executed, and a specific implementation manner may refer to the method embodiment and will not be described herein.

It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. The above-described apparatus embodiments are merely illustrative, for example, the division of the units is merely a logical function division, and there may be other manners of division in actual implementation, and for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some communication interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.

It should be noted that: like reference numerals and letters in the following figures denote like items, and thus once an item is defined in one figure, no further definition or explanation of it is required in the following figures, and furthermore, the terms "first," "second," "third," etc. are used merely to distinguish one description from another and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the foregoing examples are merely specific embodiments of the present application, and are not intended to limit the scope of the present application, but the present application is not limited thereto, and those skilled in the art will appreciate that while the foregoing examples are described in detail, the present application is not limited thereto. Any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or make equivalent substitutions for some of the technical features within the technical scope of the disclosure of the present application; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The test system of the vehicle-mounted display screen is characterized by comprising a test computer, an oscilloscope, a logic analyzer, a relay and a display screen to be tested, wherein the oscilloscope, the logic analyzer and the relay are respectively in communication connection with the display screen to be tested, the oscilloscope, the logic analyzer and the relay are respectively in communication connection with the test computer, a first pin of an I/O to be tested in the display screen to be tested is introduced onto the oscilloscope, and a second pin of digital logic to be tested in the display screen to be tested is introduced onto the logic analyzer;

2. The test system of claim 1, further comprising a programmable power supply electrically connected to the test computer, the oscilloscope, the logic analyzer, the relay, and the display screen under test, the test computer being communicatively connected to the programmable power supply;

3. The test system of claim 1, wherein the display screen to be tested comprises a circuit board, an onboard display screen, and a connector, wherein the circuit board is electrically connected to the onboard display screen, and wherein the circuit board is mounted on the connector.

4. The test system of claim 2, wherein the oscilloscope is connected to the test computer via USB, the logic analyzer is connected to the test computer via USB, the relay is connected to the test computer via RS232 serial port, and the programmable power supply is connected to the test computer via RS232 serial port.

5. The testing device of the vehicle-mounted display screen is characterized by comprising a vehicle-mounted display screen, contact pins, a first acrylic plate, a second acrylic plate, a display screen flat cable, a circuit board, a metal framework, a first plug-in terminal, a second plug-in terminal and a testing bracket, wherein the open pore positions of the first acrylic plate and the second acrylic plate are in one-to-one correspondence with test points of the circuit board; wherein,

the vehicle-mounted display screen is connected with the circuit board through the display screen flat cable, and the contact pins are contacted with test points on the circuit board through opening positions in the first acrylic plate and the second acrylic plate;

the first acrylic plate and the second acrylic plate are arranged on the metal framework and are connected to the test bracket through a hinge;

6. The test method for the vehicle-mounted display screen is characterized in that the test method is applied to the test system for the vehicle-mounted display screen according to the claims 1-4, the test system comprises a test computer, an oscilloscope, a logic analyzer, a relay and a display screen to be tested, the oscilloscope, the logic analyzer and the relay are respectively in communication connection with the test computer, wherein a first pin of an I/O to be tested in the display screen to be tested is introduced to the oscilloscope, and a second pin of digital logic to be tested in the display screen to be tested is introduced to the logic analyzer; the test method comprises the following steps:

7. The test method of claim 6, wherein the test system further comprises a programmable power supply electrically connected to the display screen to be tested, the test computer being communicatively connected to the programmable power supply; the test method further comprises the following steps:

8. The method of testing according to claim 6, wherein the display screen to be tested comprises a circuit board, an onboard display screen, and a connector, wherein the circuit board is electrically connected to the onboard display screen, and wherein the circuit board is mounted on the connector.

9. An electronic device, comprising: a processor, a memory and a bus, said memory storing machine readable instructions executable by said processor, said processor and said memory communicating via said bus when the electronic device is running, said machine readable instructions when executed by said processor performing the steps of the method of testing an on-board display according to any one of claims 6 to 8.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the method for testing an in-vehicle display screen according to any one of claims 6 to 8.