CN223155129U - Automatic test system for display screen - Google Patents

Abstract

The utility model discloses an automatic test system of a display screen, which comprises a data communication unit, a main control module, a CANFD receiving and transmitting unit, a current acquisition module, a level detection module, a brightness acquisition module, an equipment interface, a serial interface and a power supply module. The data communication unit is adopted to realize data communication between the upper computer and the main control module, the upper computer sends corresponding instructions to the main control module, the main control module controls information acquisition and sends acquired information to the upper computer, so that automatic testing is realized, multiple functional tests can be considered, and compared with conventional manual testing, the testing efficiency and the testing precision of the display screen testing are improved.

Description

Automatic test system for display screen

Technical Field

The utility model relates to the technical field of display screen testing, in particular to an automatic testing system for a display screen.

Background

With the development of society and the progress of science and technology, highly intelligent and informationized electronic equipment is increasingly different, and a display screen is used as an important component of the electronic equipment, so that various functions can be realized, and the use experience of the electronic equipment can be improved.

The display screen generally needs to be functionally tested before leaving the factory to verify whether the display screen can work normally. The traditional test equipment generally adopts a singlechip test system, has single test function (for example, only supports CAN message test or serial port test), has low automation degree, and is easy to occur misjudgment and misjudgment due to the fact that manual comparison is needed to complete the test when the CAN message test is carried out, so that the test process is time-consuming and labor-consuming, the requirement on the service level of a tester is high, and the test equipment is not suitable for test scenes of diversified display screens.

It is therefore an object of the present application to provide an automatic test system for a display screen that solves at least one of the above problems.

Disclosure of utility model

The utility model aims to solve the defects of the technology, and discloses an automatic testing system for a display screen.

The utility model designs an automatic test system of a display screen, which comprises a data communication unit, a main control module, a CANFD transceiver unit, a current acquisition module, a level detection module, a brightness acquisition module, an equipment interface, a serial interface and a power supply module, wherein the data communication unit is connected with the main control module;

The data communication unit is electrically connected with the host computer, the level detection module, the equipment interface and the power supply module are electrically connected with an input power supply respectively, the CANFD transceiver unit, the equipment interface and the serial interface are electrically connected with a display screen to be tested respectively, and the brightness acquisition module is arranged on the display screen;

The system comprises a current acquisition module, a level detection module, a brightness acquisition module, a main control module and a control module, wherein the current acquisition module is used for acquiring working current information of the display screen and sending the working current information to the main control module;

The CANFD transceiver unit is used for receiving the message information of the display screen and sending the message information to the main control module;

The serial interface is used for receiving corresponding serial port printing information of the display screen and sending the serial port printing information to the main control module;

The main control module is used for controlling the information acquisition of the display screen and the main control module according to the instruction sent by the upper computer and sending the acquired information to the upper computer, wherein the acquired information comprises message information, serial port printing information, working current information, high-low level state information and brightness information;

The upper computer is used for sending an instruction to the main control module and comparing the received acquisition information with corresponding preset information to obtain a test result;

the data communication unit is used for communication connection between the upper computer and the main control module.

Preferably, the automatic test system further comprises a driving module and a switch unit, wherein the driving module is respectively and electrically connected with the main control module and the switch unit, and the switch unit is respectively and electrically connected with the input power supply and the equipment interface.

Preferably, the device interface comprises a Batt interface and an IGN interface which are respectively and electrically connected with the display screen, and the switch unit comprises a first relay unit and a second relay unit which are respectively and electrically connected with the driving module;

The Batt interface is electrically connected with one end of the first relay unit, the IGN interface is electrically connected with one end of the second relay unit, and the input power supply is respectively electrically connected with the other end of the first relay unit and the other end of the second relay unit.

Preferably, the brightness acquisition module comprises a photosensitive interface electrically connected with the main control module, and an ambient light sensor is externally connected to the photosensitive interface.

Preferably, the CANFD transceiver unit, the current acquisition module, the level detection module, the brightness acquisition module, the equipment interface and the serial interface are respectively provided with at least two.

Preferably, the data communication unit is an ethernet communication unit.

Preferably, the ethernet communication unit includes a data transmission module and a communication interface, wherein the data transmission module is electrically connected with the main control module, and the communication interface is connected with the upper computer.

Preferably, the display screen is at least one of a central control screen, a handrail screen, a display screen of a smart watch and a display screen of a learning machine.

The utility model provides an automatic test system for a display screen, which has the technical effects that:

1. The data communication unit is adopted to realize data communication between the upper computer and the main control module, the upper computer sends corresponding instructions to the main control module, the main control module respectively sends parameter information collected by the collecting units such as the current collecting module, the level detecting module, the brightness collecting module and the like, serial port printing information received by the serial interface and message information received by the CANFD receiving and transmitting unit to the upper computer according to the instructions, and then the upper computer is used for realizing various automatic test functions such as current detection, brightness detection, high-low level detection, message detection, serial port detection and the like, so that the test functions are richer, and compared with the conventional manual test, the test efficiency and the test precision of the display screen test are improved.

2. The current acquisition module, the level detection module, the CANFD transceiver unit, the brightness acquisition module, the equipment interface and the serial interface are all multiple to form multiple test channels, and can support one display screen to test independently or multiple display screens to test synchronously.

Drawings

FIG. 1 is a schematic diagram of an automatic test system for display screens according to the present utility model;

FIG. 2 is a schematic diagram of a display screen automatic test system according to the present utility model;

FIG. 3 is a schematic diagram of a test flow of an automatic test system for display screens;

fig. 4 is a schematic circuit diagram of a data communication unit;

FIG. 5 is a circuit schematic of the CANFD transceiver;

FIG. 6 is a schematic circuit diagram of a level detection module;

FIG. 7 is a schematic circuit diagram of a current collection module;

fig. 8 is a circuit schematic of the switching unit;

Fig. 9 is a schematic circuit diagram of a power module.

The reference numerals are as follows:

1. The device comprises a data communication unit, 2, a main control module, 3, a CANFD receiving and transmitting unit, 4, a current acquisition module, 5, a level detection module, 6, a brightness acquisition module, 7, an equipment interface, 8, a serial interface, 9, a power supply module, 10, a display screen, 11, an upper computer, 12, an input power supply, 13, a first interface, 14, a second interface, 15, a Batt interface, 16, an IGN interface, 17, a first relay unit, 18, a second relay unit, 19, a driving module, 20, a photosensitive interface, 21, an ambient light sensor, 22, a data transmission module, 23, a communication interface, 24, a CANFD transceiver, 25, a CANFD interface, 26, a dial switch, 27, a power supply port, 28, a GPIO pin, 29 and a switching unit.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.

Example 1

In this embodiment, as shown in fig. 1, the automatic test system for a display screen disclosed by the utility model comprises a data communication unit 1, a main control module 2, a CANFD transceiver unit 3, a current acquisition module 4, a level detection module 5, a brightness acquisition module 6, a device interface 7, a serial interface 8 and a power supply module 9.

The data communication unit 1, the CANFD transceiver unit 3, the current acquisition module 4, the level detection module 5, the brightness acquisition module 6, the equipment interface 7, the serial interface 8 and the power module 9 are respectively and electrically connected with the main control module 2, the data communication unit 1 is connected with the upper computer 11, and the current acquisition module 4, the level detection module 5, the equipment interface 7 and the power module 9 are respectively and electrically connected with the input power supply 12.

As shown in fig. 1 and 2, at least two CANFD transceiver units 3, a current collection module 4, a level detection module 5, a brightness collection module 6, an equipment interface 7 and a serial interface 8 are respectively provided, and three CANFD transceiver units are respectively provided in this embodiment, and are a group a, a group B and a group C in sequence. The display screen 10 is at least one of a central control screen, a handrail screen, a display screen of a smart watch and a display screen of a learning machine.

The data communication unit 1 is used for performing communication connection between the host computer 11 and the main control module 2. As shown in fig. 1,2 and 4, the data communication unit 1 is an ethernet communication unit, and the ethernet communication unit includes a data transmission module 22 and a communication interface 23 that are connected, where the data transmission module 22 is electrically connected to the main control module 2, and the communication interface 23 is connected to the upper computer 11.

In this embodiment, the data transmission module 22 adopts an ethernet Phy chip, and the communication interface 23 is an RJ45 interface, which can support 100M ethernet (TCP/IP protocol) bi-directional communication.

And the CANFD transceiver unit 3 is used for receiving the message information of the display screen 10 and sending the message information to the main control module 2.

As shown in fig. 1, 2 and 5, in this embodiment, the CANFD transceiver unit 3 includes a CANFD transceiver 24 and a CANFD interface 25, where the CANFD transceiver 24 is electrically connected to the main control module 2, and the CANFD interface 25 is electrically connected to the CANFD transceiver port of the display screen 10, so that the automatic test system can adapt to the signal transmission requirements of different display screens 10.

As shown in fig. 1 and 7, the current collection module 4 is configured to detect sampling resistors (a first resistor R2 and a second resistor R3) respectively, so as to collect working current information of the display screen 10 and send the working current information to the main control module 2.

As shown in fig. 1 and fig. 6, the level detection module 5 is configured to detect high-low level state information of an output port (i.e., a GPIO port) of the main control module 2 and send the high-low level state information to the main control module 2, so as to ensure that a hardware interface of the main control module 2 can work normally.

As shown in fig. 2, the brightness acquisition module 6 is disposed on the display screen 10 to be tested, and is configured to acquire brightness information of the display screen 10 and send the brightness information to the main control module 2. The brightness acquisition module 6 comprises a photosensitive interface 20 electrically connected with the main control module 2, and an ambient light sensor 21 arranged on the display screen 10 is externally connected to the photosensitive interface 20.

As shown in fig. 1, 2 and 8, the CANFD transceiver unit 3, the device interface 7 and the serial interface 8 are electrically connected to a display screen 10 to be tested, respectively. The automatic test system further comprises a driving module 19 and a switch unit 29, wherein the driving module 19 is respectively and electrically connected with the main control module 2 and the switch unit 29, and the switch unit 29 is respectively and electrically connected with the input power supply 12 and the equipment interface 7.

The device interface 7 comprises a Batt interface 15 and an IGN interface 16, the switch unit 29 comprises a first relay unit 17 and a second relay unit 18 which are respectively electrically connected with the driving module 19, the Batt interface 15 is electrically connected with one end of the first relay unit 17, the IGN interface 16 is electrically connected with one end of the second relay unit 18, the input power supply 12 is respectively electrically connected with the other end of the first relay unit 17 (namely, the first relay J1 and the second relay J2) and the other end of the second relay unit 18 (namely, the third relay J3 and the fourth relay J4). In this embodiment, the Batt interface 15 is electrically connected to the power port 27 of the display screen 10, for supplying power to the display screen 10 through the automatic test system, and the IGN interface 16 is electrically connected to the GPIO pin 28 of the display screen 10, for waking up the display screen 10 and preventing it from entering a sleep state.

The serial interface 8 is electrically connected with the serial port module on the display screen 10, and is used for receiving corresponding serial port printing information of the display screen 10 and sending the serial port printing information to the main control module 2. The serial port baud rate of the automatic test system can be set through the upper computer 11, so that the test requirements of the display screens 10 in different fields can be met.

As shown in fig. 1 and 9, the power module 9 is configured to supply power to internal modules of the automatic test system, and the input power 12 supplies power to a plurality of display screens 10 to be tested, so that the power supply is safer and more reliable, and meanwhile, the packaging volume of the power module 9 can be reduced. The input end of the power module 9 is provided with a first protection unit R1, and the first protection unit R1 is electrically connected with the input power 12 through a first interface 13. Wherein, the first protection unit R1 is a fuse.

The automatic test system further comprises sampling resistors (namely a first resistor R2 and a second resistor R3) and a second protection unit (namely a third resistor R4 and a fourth resistor R5), wherein the sampling resistors (the first resistor R2 and the second resistor R3) are connected with the second protection unit (the third resistor R4 and the fourth resistor R5) in series, the current collection module 4 is connected with the sampling resistors (the first resistor R2 and the second resistor R3), the first ends of the sampling resistors (the first resistor R2 and the second resistor R3) are electrically connected with the equipment interface 7 through a switch unit 29, and the second ends of the second protection unit (the third resistor R4 and the fourth resistor R5) are respectively electrically connected with the input power supply 12 through a second interface 14. The second protection unit (third resistor R4 and fourth resistor R5) is a fuse. The first interface 13 and the second interface 14 are DC sockets, and the input power 12 adopts a switching power supply.

The main control module 2 is implemented by an MCU, and is used for controlling information acquisition on the display screen 10 and the main control module 2 according to instructions sent by the upper computer 11, and sending acquisition information to the upper computer 11, wherein the acquisition information comprises message information, serial port printing information, working current information, high-low level state information and brightness information.

The upper computer 11 is configured to send an instruction to the main control module 2, and further configured to compare the received collected information with corresponding preset information to obtain a test result. The upper computer 11 can also generate a test report according to the test result, so that the subsequent user can check conveniently.

The automatic test system also includes a dial switch 26 as a reserved module for custom functions.

The automatic test system of the display screen provided by the utility model can respectively send the collected working current information, the high-low level state information, the brightness information, the message information and the serial port printing information to the upper computer 11 through the upper computer 11 in an Ethernet communication mode, so that the automatic test system can simultaneously cover the test requirements on multiple dimensions such as current, optics, communication connection and the like, can perform embedded GPIO test by verifying the high-low level state information of the output port of the main control module 2, can simultaneously control a plurality of display screens 10 or independently test one display screen 10, has lower test level requirements on testers, and simplifies the test steps.

As shown in fig. 3, in this embodiment, a test flow of the automatic test system is described by using two test channels, and the test flow is as follows:

1. Main control module 2 hardware initialization

The main control module 2 performs initialization operation by default before receiving an instruction sent by the upper computer 11, and specifically includes clock system initialization, GPIO port initialization, timer initialization, CANFD initialization, serial port initialization, freeRTOS initialization. After receiving the instruction, the MCU may change the configuration information of the CANFD interface 25 and the serial interface 8 according to the instruction content.

2. Ethernet initialization

3. Send instruction

Specifically, the upper computer 11 is in communication connection with the main control module 2 through the data communication unit 1 according to a preset communication protocol, and a tester sends an instruction to the main control module 2 through the upper computer 11.

4. The host computer 11 detects whether a response is received

The upper computer 11 detects whether a response sent by the main control module 2 (namely, receives data information such as working current information, high-low level state information, brightness information, message information, serial port printing information and the like sent by the MCU) is received, if the upper computer 11 detects that the response is received, the corresponding instruction is executed and then the detection is continued, if the response is not received, the detection is continued.

The instructions comprise channel selection instructions and detection instructions, the channels comprise a first test channel and a second test channel, each test channel is correspondingly connected with a display screen 10 to be tested, the number of the test channels can be set according to the needs, each test channel respectively receives each detection instruction, and each detection instruction comprises a detection current instruction, a detection brightness instruction, a detection message instruction, a detection serial port instruction and a detection high-low level instruction.

5. Executing instructions

When the upper computer 11 detects the current, the upper computer 11 reads the working current information of the display screen 10 sent by the main control module 2 according to the sent detection current instruction, compares the working current information with the preset working current and judges whether the current working current of the display screen 10 is normal or not.

When the upper computer 11 detects brightness, the upper computer 11 reads the brightness information of the display screen 10 sent by the main control module 2 according to the sent brightness detection instruction, compares the brightness information with preset brightness, and judges whether the current brightness of the display screen 10 meets the requirement.

When the upper computer 11 detects a message, the upper computer 11 initializes the CANFD interface 25 according to the transmitted detection message instruction, and then traverses all message information uploaded by the CANFD transceivers 24, compares the message information with set message data, checks whether the message data exist, and ensures the safety of communication.

When the upper computer 11 detects serial ports, the upper computer 11 initializes the serial ports 8 according to the transmitted serial port detection instructions, traverses serial port printing information of all the serial ports 8, compares the serial port printing information with keywords set in the upper computer 11, checks whether corresponding serial ports exist, and ensures accuracy of vehicle data transmission.

When the upper computer 11 detects high and low levels, the upper computer 11 reads the state information of the output port level of the main control module 2 according to the sent high and low level detection instruction, compares the state information with the set level and judges whether the port connection of the main control module 2 meets the set requirement.

The present utility model is not limited to the above-mentioned preferred embodiments, and any person who can obtain other various products under the teaching of the present utility model can make any changes in shape or structure, and all the technical solutions that are the same or similar to the present utility model fall within the scope of the present utility model.

Claims (8)

1. The automatic test system of the display screen is characterized by comprising a data communication unit (1), a main control module (2), a CANFD transceiver unit (3), a current acquisition module (4), a level detection module (5), a brightness acquisition module (6), an equipment interface (7), a serial interface (8) and a power supply module (9);

The device comprises a data communication unit (1), a CANFD transceiver unit (3), a current acquisition module (4), a level detection module (5), a brightness acquisition module (6), an equipment interface (7), a serial interface (8) and a power supply module (9), wherein the data communication unit (1) is electrically connected with a main control module (2), the data communication unit (1) is connected with an upper computer (11), the current acquisition module (4), the level detection module (5), the equipment interface (7) and the power supply module (9) are electrically connected with an input power supply (12), the CANFD transceiver unit (3), the equipment interface (7) and the serial interface (8) are electrically connected with a display screen (10) to be tested, and the brightness acquisition module (6) is arranged on the display screen (10);

The system comprises a current acquisition module (4), a level detection module (5) and a brightness acquisition module (6), wherein the current acquisition module is used for acquiring working current information of a display screen (10) and sending the working current information to a main control module (2), the level detection module (5) is used for detecting high and low level state information of an output port of the main control module (2) and sending the high and low level state information to the main control module (2), and the brightness acquisition module (6) is used for acquiring brightness information of the display screen (10) and sending the brightness information to the main control module (2);

the CANFD transceiver unit (3) is used for receiving the message information of the display screen (10) and sending the message information to the main control module (2);

The serial interface (8) is used for receiving corresponding serial port printing information of the display screen (10) and sending the serial port printing information to the main control module (2);

The main control module (2) is used for controlling the information acquisition of the display screen (10) and the main control module (2) according to the instruction sent by the upper computer (11) and sending acquired information to the upper computer (11), wherein the acquired information comprises message information, serial port printing information, working current information, high-low level state information and brightness information;

The upper computer (11) is used for sending an instruction to the main control module (2) and comparing the received acquisition information with corresponding preset information to obtain a test result;

the data communication unit (1) is used for carrying out communication connection between the upper computer (11) and the main control module (2).

2. The automatic test system for a display screen according to claim 1, further comprising a driving module (19) and a switching unit (29), wherein the driving module (19) is electrically connected with the main control module (2) and the switching unit (29), and the switching unit (29) is electrically connected with the input power supply (12) and the device interface (7).

3. The automatic test system for a display screen according to claim 2, wherein the device interface (7) comprises a Batt interface (15) and an IGN interface (16) which are electrically connected with the display screen (10), respectively, and the switch unit (29) comprises a first relay unit (17) and a second relay unit (18) which are electrically connected with the driving module (19), respectively;

The electric power source is characterized in that the Batt interface (15) is electrically connected with one end of the first relay unit (17), the IGN interface (16) is electrically connected with one end of the second relay unit (18), and the input power source (12) is electrically connected with the other end of the first relay unit (17) and the other end of the second relay unit (18) respectively.

4. The automatic test system of display screen of claim 1, wherein the brightness acquisition module (6) comprises a photosensitive interface (20) electrically connected with the main control module (2), and an ambient light sensor (21) is externally connected to the photosensitive interface (20).

5. The automatic test system of display screen according to claim 1, wherein at least two of the CANFD transceiver unit (3), the current acquisition module (4), the level detection module (5), the brightness acquisition module (6), the device interface (7) and the serial interface (8) are respectively arranged.

6. An automatic test system for a display screen according to claim 1, characterized in that the data communication unit (1) is an ethernet communication unit.

7. The automatic test system of display screen of claim 6, wherein the Ethernet communication unit comprises a data transmission module (22) and a communication interface (23) which are connected, the data transmission module (22) is electrically connected with the main control module (2), and the communication interface (23) is connected with the upper computer (11).

8. The automatic test system for display screens according to claim 1, wherein the display screen (10) is at least one of a center control screen, a handrail screen, a display screen of a smart watch, and a display screen of a learning machine.