Automatic function testing device and method for DWUM case

Abstract

The invention relates to an automatic function testing device and method for a DWUM case. The device comprises a power conversion module, a relay module, a signal interface module, an industrial personal computer control module and a tested DWUM case. The power supply conversion module supplies power to the first relay, the second relay and the tested DWUM case, the industrial personal computer is connected with the first relay and the second relay through a relay control panel, and the industrial personal computer is connected with the tested DWUM case through a signal interface module; the method comprises a power supply process, a control process and a test process, and realizes automatic function test of the tested DWUM case. Compared with the prior art, the method has the advantages of being high in testing efficiency, reliable in testing result, high in data integrity and traceability and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle-mounted equipment function testing, in particular to an automatic function testing device and method for a DWUM case. BACKGROUND

[0002] With the improvement of the integration and functional complexity of vehicle-mounted electronic equipment, vehicle-mounted equipment function testing has experienced a development process from manual testing to semi-automated testing. In the early stage, the testing of DWUM type equipment (which undertakes functions such as log recording, remote wake-up, DataPlug switching, etc.) completely relies on manual operation: the tester needs to manually switch the power module output, plug in and plug out the test cables such as serial communication lines / ethernet network cables, manually read voltage / current data through a multimeter, and manually calculate indicators such as communication packet loss rate, and the testing process relies on experience and is extremely inefficient. With the progress of technology, semi-automated testing solutions have gradually developed: independent special test instruments are introduced, such as programmable power supplies (which can manually adjust or simply program the power output), special serial communication testers (which support one-way communication testing of RS422 / RS232 protocols), and Ethernet performance testers (which can test the packet loss rate and bit error rate of a single Ethernet interface). This kind of solution has improved the testing accuracy of single function modules, but each instrument still needs to be manually coordinated by the tester, and has not formed an integrated testing system.

[0003] Chinese invention with publication number CN109342929A discloses a CVC-200T hardware intelligent testing system and method, which includes a measured board card, a NI PXI case and a matching board card, a network load board, an industrial computer, a gigabit switch, a display, a keyboard and a mouse, and a scanning gun. The measured board card includes a main logic unit (MLU) board and a communication management unit (CMU) board. The industrial computer is an upper computer, which runs an upper computer testing program based on the NI visual programming software LabVIEW. The measured board card is a lower computer, which runs a lower computer testing program of the CVC-200T board card. The industrial computer sends control commands to the measured board card and receives testing data feedback from the measured board card, and automatically judges the testing result. The display and the keyboard and the mouse are used for human-computer interaction, and the scanning gun is used for inputting the two-dimensional code and the MAC address information of the measured board card. The above-mentioned invention based on the NI visual programming software LabVIEW and the laboratory testing program automatically saves the testing result, realizes convenient operation, reduces development cost, improves testing efficiency, and shortens the productization process. However, there are still problems such as scattered testing equipment, low efficiency caused by poor compatibility between modules, interface misplug and other testing failures caused by manual operation, incomplete data in the testing process, and difficulty in tracing.

[0004] In summary, there is currently a lack of an automated functional testing device and method for DWUM chassis to solve or partially solve the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects of the prior art by providing an automated functional testing device and method for DWUM chassis, so as to solve or partially solve the problems of low efficiency caused by scattered testing equipment and poor compatibility between modules, test failures such as mis-insertion of interfaces and incorrect reading of parameters during manual operation, as well as incomplete data and difficulty in traceability during the testing process.

[0006] The objective of this invention can be achieved through the following technical solutions: According to one aspect of the present invention, an automated functional testing apparatus for a DWUM chassis is provided, specifically comprising: A power conversion module, including a conversion unit, is used to convert mains power into DC and AC power to provide a stable power supply; The relay module includes a relay control board, a first relay with contacts connected in series in the output load circuit, and a second relay with contacts connected in series in the low-voltage logic control circuit. The first and second relays are driven by the instructions of the relay control board to realize the on / off control of the output circuit and assist in the signal switching of serial communication and I / O testing. The signal interface module includes a DB62 electrical connector, an Ethernet interface, and a USB interface, used to establish communication between the industrial computer and the DWUM chassis under test. The industrial control computer control module includes an industrial control computer and built-in test software. The industrial control computer is connected to the DWUM chassis under test through a signal interface module. The test software realizes the functions of command issuance, data acquisition, result judgment and data storage, and is used to provide a human-machine interface. The DWUM chassis under test provides I / O interfaces, RS422 interfaces, Ethernet interfaces, USB interfaces, and DEBUG interfaces; The power conversion module supplies power to the first relay, the second relay, and the DWUM chassis under test. The industrial control computer is connected to the first relay and the second relay through the relay control board, and the industrial control computer is connected to the DWUM chassis under test through the signal interface module.

[0007] As a preferred technical solution, the conversion unit includes a 220VAC→110VDC conversion unit and a 220VAC→24VAC conversion unit.

[0008] As a preferred technical solution, the industrial control computer control module also includes an extended RS-232 / 422 / 485 interface.

[0009] As a preferred technical solution, the human-computer interaction interface includes buttons for powering on / off the device, updating the program, and starting the test.

[0010] As a preferred technical solution, the device is used to verify the logging, remote wake-up, and DataPlug switching functions of the DWUM chassis under test.

[0011] According to another aspect of the present invention, an automated functional testing method for a DWUM chassis is provided, the method being performed by the aforementioned apparatus, specifically comprising: Power supply process: The mains power is input into the power conversion module, and after conversion, the appropriate voltage is output to the power interface of the DWUM chassis under test, as well as the relay coils built into the first and second relays. Control process: The industrial computer control module sends commands to the relay control board through the test software and the multi-serial port card to drive the relay contacts to open and close, and establishes communication with the DWUM chassis under test through the signal interface module; Test process: Synchronously collect test data from I / O interfaces, Ethernet interfaces, and auxiliary interfaces. Perform functional tests based on the collected test data, including I / O tests, serial communication tests, Ethernet tests, and auxiliary interface tests, to achieve automated functional testing of the DWUM chassis under test.

[0012] As a preferred technical solution, the I / O test includes the following steps: By controlling the on / off state of the relay control circuit, the industrial control computer collects the status of the DWUM chassis under test for different voltage inputs and / or monitors the load current of the voltage output.

[0013] As a preferred technical solution, the serial communication test includes the following steps: The industrial control computer sends commands to the DWUM chassis under test via the DB62 electrical connector to control the DWUM chassis under test to read and write external DataPlug data, thereby verifying the correctness of communication between the RS422 serial port and the D-SUDB interface.

[0014] As a preferred technical solution, the Ethernet test includes the following steps: The industrial control computer sends Ethernet data packets to the DWUM chassis under test via the I-LAN / E-LAN ​​interface, and the packet loss rate and bit error rate are statistically analyzed.

[0015] As a preferred technical solution, the auxiliary interface test includes the following steps: The industrial control computer controls the reading and writing of the USB flash drive via the USB port, receives debugging information via the DEBUG serial port, and displays the corresponding status on the DWUM chassis under test based on the received debugging information and displays it on the display screen of the DWUM chassis under test.

[0016] Compared with the prior art, the present invention has at least one of the following beneficial effects: (1) Improved testing efficiency: By integrating and connecting the power conversion module, relay module, signal interface module and industrial control computer module, this invention solves the problem of low efficiency caused by the dispersion of test equipment and poor compatibility between modules, and achieves the technical effect of shortening the test time and improving the test efficiency.

[0017] (2) Improved reliability of test results: The present invention adopts full-process automated testing and uses the human-computer interaction interface of the test software built into the industrial control computer control module to control the test process, realize one-click closed-loop testing, solve the test failure problems caused by misinsertion of interface and incorrect reading of parameters during manual operation, and achieve the technical effect of reducing the operation threshold of operators and improving the reliability of test results.

[0018] (3) Enhance data integrity and traceability: This invention solves the problem of incomplete data and difficulty in traceability during the testing process by synchronously collecting and recording the test results of I / O test, serial communication test, Ethernet test and auxiliary interface test through multi-dimensional data synchronous collection. It achieves the technical effect of complete storage of test data and data traceability, provides a complete basis for product quality analysis and fault tracing, and helps the digital management of the production process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the functional testing device of the present invention; Figure 2 This is the schematic diagram of the power conversion module; Figure 3 This is the schematic diagram of the relay control board; Figure 4 This is the schematic diagram of a 110V relay. Figure 5 This is the schematic diagram of a 24V relay. Figure 6 This is the schematic diagram of the DWUM cage I / O. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0021] Example 1 To address the problems existing in the prior art, this embodiment provides an automated functional testing device for a DWUM chassis, such as... Figure 1 As shown, it specifically includes: Power conversion modules, such as Figure 2 As shown, it includes a "220VAC→110VDC conversion unit" and a "220VAC→24VA conversion unit", which are used to convert the mains power to DC110V (supplying the DWUM chassis 110V power interface and DC110V relay coil) and 24VAC (supplying the DC24V relay coil) to provide a stable power supply for the test circuit. The relay module includes a relay control board, a first relay with contacts connected in series in the output load circuit, and a second relay with contacts connected in series in the low-voltage logic control circuit. The schematic diagram of the relay control board is shown below. Figure 3 As shown, the first relay is a 3-channel DC 110V relay, as... Figure 4 As shown, driven by commands from the relay control board, the 110V output circuit is switched on and off (used to verify the 110V normally open node output capability of the DWUM chassis). The second relay is a 4-channel DC 24V relay, as shown... Figure 5 As shown, the signal switching for auxiliary serial communication and I / O testing is driven by instructions from the relay control board. The signal interface module includes a DB62 electrical connector, an Ethernet interface, and a USB interface, used to establish communication between the industrial computer and the DWUM chassis under test. The industrial control computer module includes an industrial computer and built-in test software. It is equipped with multiple serial port cards (expanding to 8 RS-232 / 422 / 485 interfaces) to meet the requirements of multi-channel serial communication. The industrial computer is connected to the DWUM chassis under test through a signal interface module. The test software realizes the functions of command issuance, data acquisition, result judgment and data storage, and provides a human-machine interface (such as "Power on / off", "Program update" and "Start test" buttons). It is the control center of the test system. The tested DWUM chassis, such as Figure 6As shown, it integrates DWB and DWU boards internally, and provides I / O interfaces, RS422 interfaces, Ethernet interfaces (I-LAN1~2, E-LAN1~4), USB interfaces and DEBUG interfaces externally. It is the verification object of this functional test (core functions such as "log recording, remote wake-up, and DataPlug conversion" need to be verified). The power conversion module supplies power to the first relay, the second relay, and the DWUM chassis under test. The industrial computer is connected to the first relay and the second relay through the relay control board, and to the DWUM chassis under test through the signal interface module.

[0022] Example 2 Regarding the automated functional testing device for a DWUM chassis provided in the foregoing embodiments, this embodiment provides an automated functional testing method for a DWUM chassis. This method is executed by the aforementioned automated functional testing device for a DWUM chassis and specifically includes: Power supply process: The 220V AC mains power is input into the power conversion module, and after conversion, it outputs DC110V (to the DWUM chassis power interface and DC110V relay coil) and 24VAC (to the DC24V relay coil), establishing the power foundation for the test system; Control Flow: The industrial computer control module sends commands to the relay control board through the test software and a multi-serial port card to drive the DC110V / 24V relay contacts to open and close, realizing the switching control of the "110V load circuit" and "low voltage logic circuit". The industrial computer establishes communication with the DWUM chassis under test through signal interface modules (DB62, Ethernet, USB, etc.). Test process: Synchronously collect test data from I / O interfaces, Ethernet interfaces, and auxiliary interfaces. Perform functional tests based on the collected test data, including I / O tests, serial communication tests, Ethernet tests, and auxiliary interface tests, to achieve automated functional testing of the DWUM chassis under test.

[0023] The 110VI / O test includes the following steps: The DC110V relay controls the on / off state of the circuit and uses an industrial computer to collect the status of the DWUM chassis under test for "0V / 110V input" and / or monitor the load current of the voltage output.

[0024] Serial communication testing includes the following steps: The industrial computer sends commands to the DWUM chassis under test via the DB62 electrical connector to control the DWUM chassis under test to read and write external DataPlug data, and to verify the correctness of communication between the RS422 serial port and the D-SUDB interface.

[0025] Ethernet testing includes the following steps: The industrial control computer sends Ethernet data packets of "512 bytes, 1024 bytes, maximum single packet length" to the DWUM chassis under test via the I-LAN / E-LAN ​​interface, and calculates the packet loss rate and bit error rate.

[0026] Auxiliary interface testing includes the following steps: The industrial control computer controls the reading and writing of the USB flash drive via the USB port, receives debugging information via the DEBUG serial port, and displays the corresponding status on the DWUM chassis under test based on the received debugging information. The DWUM chassis display screen is manually observed to see if it is lit up and if the display is normal, and feedback is provided in the software pop-up window.

[0027] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An automated functional testing device for a DWUM chassis, comprising: The device comprises: a power conversion module comprising a conversion unit for converting commercial power into direct current and alternating current to provide stable power supply; a relay module comprising a relay control board, a first relay with contacts connected in series in an output load circuit, and a second relay with contacts connected in series in a low-voltage logic control circuit, the first relay and the second relay being driven by the instructions of the relay control board to realize the on-off control of the output circuit, and the signal switching for auxiliary serial communication and I / O test; a signal interface module comprising a DB62 electrical connector, an Ethernet interface and a USB interface for establishing communication between the industrial computer and the DWUM case under test; an industrial computer control module comprising an industrial computer and a built-in test software, the industrial computer being connected to the DWUM case under test through the signal interface module, and the test software realizing the functions of instruction issuing, data acquisition, result determination and data storage for providing a man-machine interactive interface; a DWUM case under test providing I / O interface, RS422 interface, Ethernet interface, USB interface and DEBUG interface; the power conversion module supplies power to the first relay, the second relay and the DWUM case under test, the industrial computer is connected to the first relay and the second relay through the relay control board, and the industrial computer is connected to the DWUM case under test through the signal interface module.

2. The automated functional testing device for a DWUM chassis of claim 1, wherein, The conversion unit comprises a 220VAC→110VDC conversion unit and a 220VAC→24VAC conversion unit.

3. The automated functional testing device for a DWUM chassis of claim 1, wherein, The industrial computer control module further comprises an extended RS-232 / 422 / 485 interface.

4. The automated functional testing device for a DWUM chassis of claim 1, wherein, The man-machine interactive interface comprises buttons of device power-on / power-off, program update and start test.

5. The automated functional testing device for a DWUM chassis of claim 1, wherein, The device is used for verifying the functions of log recording, remote wake-up and DataPlug switching of the DWUM case under test.

6. A method for automated functional testing of a DWUM chassis, the method comprising: The method is performed by the device of any one of claims 1-5, and specifically comprises: a power supply process: inputting commercial power into the power conversion module, and outputting the converted voltages to the power supply interface of the DWUM case under test and the relay coils built in the first relay and the second relay; a control process: the industrial computer control module sends instructions to the relay control board through the test software and the multi-serial card to drive the relay contacts to turn on and off, and establishes communication with the DWUM case under test through the signal interface module; a test process: synchronously acquiring test data of the I / O interface, the Ethernet interface and the auxiliary interface, and performing function test according to the acquired test data, including I / O test, serial communication test, Ethernet test and auxiliary interface test, to realize automatic function test of the DWUM case under test.

7. The method for automated functional testing of a DWUM chassis of claim 6, wherein, The I / O test comprises the following steps: turning on and off the relay control circuit, and using the industrial computer to acquire the state of the DWUM case under test to different voltage inputs and / or monitor the load current of voltage output.

8. The method for automated functional testing of a DWUM chassis of claim 6, wherein, The serial communication test comprises the following steps: Through the industrial computer, instructions are sent to the measured DWUM case through the DB62 electrical connector to control the measured DWUM case to read and write external DataPlug data, and to verify the communication correctness of the RS422 serial port and the D-SUDB interface.

9. The method for automated functional testing of a DWUM chassis of claim 6, wherein, The Ethernet test comprises the following steps: Through the industrial computer, Ethernet data packets are sent to the measured DWUM case through the I-LAN / E-LAN interface, and the packet loss rate and the bit error rate are counted.

10. The method for automated functional testing of a DWUM chassis of claim 6, wherein, The auxiliary interface test comprises the following steps: The industrial computer controls the U disk to read and write through the USB interface, receives debugging information through the DEBUG serial port, and displays corresponding states on the measured DWUM case according to the received debugging information and on the display screen of the measured DWUM case.

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