Test circuit and automatic test system

Abstract

The utility model discloses a test circuit and an automatic test system, the test circuit comprises a to-be-tested device, a test tool and a peripheral docking device, and the to-be-tested device is connected with the peripheral docking device through the test tool. The peripheral docking device at least comprises one of the following devices: a radio frequency communication test device, a T1 communication test device, a voice call test device, and a CAN and USB communication test device; the test tool supplies power to the to-be-tested equipment and connects an external communication interface of the to-be-tested equipment to the peripheral docking equipment; and the equipment to be tested comprises VT-BOX vehicle-mounted equipment. On one hand, production line automatic detection of the VT-BOX vehicle-mounted equipment is achieved, and on the other hand, efficient automatic testing is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of test circuit, and particularly relates to a test circuit and an automatic test system. BACKGROUND

[0002] With the development of vehicle-road cloud integration and smart city traffic, V2X communication has become a popular short-range communication scheme, and the equipment rate of vehicle-mounted V2X devices is also increasing.

[0003] VT-BOX is an advanced V2X vehicle terminal. The existing VT-BOX vehicle terminal production line detection needs manual intervention, which reduces the test efficiency and increases the manual misjudgment rate. Moreover, for V2X communication testing, only the communication function is tested, and the communication performance parameters are not tested, which is not comprehensive for the production line test of V2X, thereby causing the V2X communication performance to decline in the real vehicle. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present application provide a test circuit and an automatic test system to realize full-automatic production line test.

[0005] The embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, the embodiments of the present application provide a test circuit, wherein the circuit comprises a device under test, a test tool and a peripheral interface device, the device under test is connected with the peripheral interface device through the test tool,

[0007] The peripheral interface device at least comprises one of the following: a radio frequency communication test device, a T1 communication test device, a voice call test device, a CAN and USB communication test device;

[0008] The test tool supplies power to the device under test and connects the external communication interface of the device under test to the peripheral interface device;

[0009] The device under test comprises a VT-BOX vehicle device.

[0010] In some embodiments, after the VT-BOX vehicle device is powered on, the V2X communication function, network communication function and GNSS positioning function are detected by connecting with the radio frequency communication test device,

[0011] The vehicle-mounted Ethernet communication function is detected by connecting with the T1 communication test device;

[0012] The voice call function is detected by connecting with the voice call test device;

[0013] Through the connection with the CAN and USB communication test device, the CAN communication and the USB communication function are detected.

[0014] In some embodiments, the radio frequency communication test device comprises a comprehensive tester, a USB HUB circuit,

[0015] The to-be-tested device is connected with the comprehensive tester by using any one or more of a V2X interface, a 5G interface and a GNSS interface;

[0016] The V2X interface and the 5G interface are transmitted according to the standard transmission power, and the radio frequency parameters received are tested and judged by the comprehensive tester;

[0017] The GNSS interface is simulated by the comprehensive tester to send fixed-power fixed-point position information, and whether the GNSS signal is normally received and positioning is completed when the GNSS signal is normally received are tested and judged by the to-be-tested device;

[0018] The to-be-tested device is connected with the USB HUB circuit, and the test judgment result is transmitted to the to-be-tested device through USB.

[0019] The to-be-tested device is connected with the CAN OE detection circuit, and the judgment result is transmitted to the test PC display.

[0020] In some embodiments, the T1 communication test device comprises a T1 opposite side device,

[0021] The to-be-tested device is connected with the T1 opposite side device, and the T1 opposite side device comprises another VT-BOX vehicle-mounted device or a standard Ethernet test device.

[0022] In some embodiments, the voice call test device comprises a signal generator and a signal analyzer,

[0023] The signal generator is connected with the to-be-tested device to serve as a Mic input;

[0024] The signal analyzer is connected with the to-be-tested device to receive an Audio output;

[0025] The to-be-tested device is connected with the USB HUB circuit, and the test judgment result is transmitted to the to-be-tested device through USB.

[0026] In some embodiments, the CAN and USB communication test device comprises

[0027] The test result on the to-be-tested device is collected through the USB protocol;

[0028] The test result is transmitted to the test PC display through the CAN protocol.

[0029] In some embodiments, the comprehensive tester further includes a compensation circuit, wherein the device under test is first tested through the compensation circuit and then through the comprehensive tester.

[0030] In some embodiments, the peripheral docking device further includes a CAN OE detection circuit for sending test results to a test PC.

[0031] In some embodiments, the system further includes a test PC, which serves as a display device to display the test results.

[0032] Secondly, embodiments of this application also provide an automated testing system, wherein the testing circuit described in the first aspect is employed.

[0033] The at least one technical solution adopted in this application embodiment can achieve the following beneficial effects: The test circuit includes a device under test (DUT), a test fixture, and peripheral docking equipment. The DUT is connected to the peripheral docking equipment through the test fixture. The peripheral docking equipment includes at least one of the following: radio frequency communication test equipment, T1 communication test equipment, voice call test equipment, CAN and USB communication test equipment, which not only realizes V2X performance parameter testing, but also covers the functions included in a general VT-BOX. The test fixture supplies power to the DUT and connects the external communication interface of the DUT to the peripheral docking equipment; the DUT includes a VT-BOX vehicle-mounted device. The above test circuit realizes the automated detection and judgment of various functions of the VT-BOX equipment production line, improving the production line detection efficiency and equipment yield. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0035] Figure 1 This is a schematic diagram of the internal structure of the test circuit in the embodiments of this application;

[0036] Figure 2 This is a schematic diagram of the test circuit in the embodiments of this application;

[0037] Figure 3 This is a schematic diagram of the radio frequency communication test function in the test circuit of this application embodiment;

[0038] Figure 4 This is a schematic diagram of the T1 communication test function in the test circuit of this application embodiment;

[0039] Figure 5This is a schematic diagram of the voice call test function in the test circuit of this application embodiment;

[0040] Figure 6 This is a schematic diagram of the CAN and USB communication test function in the test circuit of this application embodiment. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] The technical solutions provided by the various embodiments of this application are described in detail below with reference to the accompanying drawings.

[0043] This application provides a test circuit 100, such as... Figure 1 The diagram shows the internal structure of the test circuit in this embodiment. The circuit includes a device under test (DUT) 120, a test fixture 110, and a peripheral interface device 130. The DUT is connected to the peripheral interface device through the test fixture. The peripheral interface device 130 includes at least one of the following: an RF communication test device, a T1 communication test device, a voice call test device, a CAN and USB communication test device. The test fixture 110 supplies power to the DUT and connects the external communication interface of the DUT to the peripheral interface device. The DUT 120 includes a VT-BOX vehicle-mounted device.

[0044] Please refer to Figure 2 The test fixture 110 supplies power to the device under test (DUT) 120 and connects the external communication interface of the DUT to the peripheral docking device 130. The DUT 120 mainly refers to the VT-BOX vehicle-mounted equipment, which includes, but is not limited to, V2X communication, network communication, GNSS positioning, CAN communication, vehicle Ethernet communication, USB communication, and voice call functionality. To achieve production-line testing of these functions, the external interface of the device is brought out using the test fixture 110, and the device is powered. Corresponding test methods are designed to automatically detect and determine the results of each function after power-on. The peripheral docking device 130 is equipped with RF communication test equipment, T1 communication test equipment, voice call test equipment, and CAN and USB communication test equipment.

[0045] Please refer to Figure 2The test circuit mainly includes the VT-BOX vehicle-mounted device under test (DUT), test fixtures, and peripheral interface devices. The test fixtures power the DUT and connect its external communication interface to the external device via a push-in mechanism, improving the efficiency of DUT production line integration. The peripheral interface devices are used for communication during functional testing and also feed test results back to the DUT. The DUT then displays the test results on the test PC, which acts as the display device, showing the final test results. The start and end of the test are both achieved with a single click.

[0046] It is understood that the VT-BOX vehicle-mounted equipment can be of various models, and no specific limitation is made in the embodiments of this application.

[0047] The aforementioned test circuit not only includes V2X performance parameter testing in VT-BOX vehicle-mounted equipment, but also covers the functions included in general VT-BOX vehicle-mounted equipment, realizing automated detection and judgment, improving production line testing efficiency and equipment yield.

[0048] In one embodiment of this application, after the VT-BOX vehicle-mounted device is powered on, it tests V2X communication function, network communication function, and GNSS positioning function by connecting to the radio frequency communication test device; it tests vehicle Ethernet communication function by connecting to the T1 communication test device; it tests voice call function by connecting to the voice call test device; and it tests CAN communication and USB communication functions by connecting to the CAN and USB communication test device.

[0049] like Figure 3 As shown, after the VT-BOX vehicle-mounted device is powered on, it connects to the radio frequency communication test equipment to test the V2X communication function, network communication function, and GNSS positioning function, as a test of the V2X communication function.

[0050] After being powered on, the VT-BOX vehicle-mounted device connects to the T1 communication test device to test the vehicle-mounted Ethernet communication function, serving as a test of the T1 function.

[0051] After being powered on, the VT-BOX in-vehicle device connects to the voice call testing device to test the voice call function.

[0052] After being powered on, the VT-BOX vehicle-mounted equipment connects to the CAN and USB communication testing equipment to test the CAN and USB communication functions.

[0053] In one embodiment of this application, the radio frequency communication test equipment includes a comprehensive tester and a USB hub circuit. The device under test (DUT) is connected to the comprehensive tester via any one or more of a V2X interface, a 5G interface, and a GNSS interface. The V2X interface and the 5G interface transmit at standard transmit power, and the comprehensive tester receives and tests the received radio frequency parameters. The comprehensive tester simulates the transmission of fixed-power location information via the GNSS interface, and the DUT tests whether it can receive GNSS signals normally and completes positioning when receiving them normally. The DUT is connected to the USB hub circuit, and the test results are sent to the DUT via USB. The DUT is connected to a CAN OE detection circuit to send the judgment results to a test PC for display.

[0054] Considering that the existing solution for testing the RF communication function in the production line test scheme for VT-BOX is to test the communication interconnection function, in addition to testing the communication interconnection function, the testing of RF parameters is also very important. Meeting the requirements of RF parameters is a prerequisite for the communication performance of RF products to meet the requirements. If the RF parameters are not qualified, it may be possible to pass the interconnection test in the production line test when the signal strength is strong and the communication distance is short, but in the actual outdoor conditions where the signal is weak and the communication distance is long, communication may fail or packet loss may occur.

[0055] The device under test (DUT) in the above circuit is connected to the comprehensive test instrument using any one or more of the following interfaces: V2X, 5G, and GNSS. The V2X and 5G interfaces transmit at standard transmission power, which is received by the comprehensive test instrument, which then tests and judges the received radio frequency parameters. The GNSS interface is used by the comprehensive test instrument to simulate the transmission of fixed-point location information at a fixed power, thus realizing the production line testing of the 5GVT-BOX vehicle terminal.

[0056] like Figure 3 As shown, the RF interface of the VT-BOX under test is connected to the comprehensive test instrument. The V2X and interface transmit at the standard transmit power, which is received by the comprehensive test instrument, which judges the RF parameters and sends the judgment result to the VT-BOX under test via USB. The VT-BOX then sends the judgment result to the test computer for display via CAN OE.

[0057] The GNSS interface is simulated by the comprehensive test instrument to send fixed-power fixed-point location information. The VT-BOX under test determines whether it can receive the GNSS signal normally and successfully complete the positioning. The determination result is sent to the test computer for display through CAN OE.

[0058] It should be noted that radio frequency parameters include, but are not limited to, transmit power, frequency, out-of-band radiation, and out-of-band spurious emissions.

[0059] In one embodiment of this application, the T1 communication test equipment includes a T1 counterpart device, the device under test is connected to the T1 counterpart device, and the T1 counterpart device includes another VT-BOX vehicle-mounted device or a standard Ethernet test equipment.

[0060] like Figure 4 As shown, the device under test (DUT) performs a ping operation with the device on the other side of T1. After a successful ping, the result is displayed on the computer via CAN OE.

[0061] Alternatively, the device on the opposite side of T1 can be another standard Ethernet test device such as VT-BOX or VECTOR.

[0062] In one embodiment of this application, the voice call testing device includes a signal generator and a signal analyzer. The signal generator is connected to the device under test (DUT) and is used as a microphone input. The signal analyzer is connected to the DUT and is used to receive audio output. The DUT is connected to the USB hub circuit, and the test result is sent to the DUT via USB.

[0063] like Figure 5 As shown, the internal sound circuit of the VT-BOX to be tested is first set up as follows: Figure 5 The diagram shows the loop mode, where sound enters through the microphone, is relayed by the CODEC to the AMP amplifier, and then the AMP outputs the sound driving signal. The microphone input uses a signal generator as an analog input, outputting a standard 1kHz sine wave. The audio output connects to a signal analyzer, which determines the frequency components of the received signal, whether it is 1kHz, and whether the signal-to-noise ratio (SNR) for 1kHz is above the standard 70dB. The results are then transmitted via USB to the VT-BOX vehicle terminal under test, which transmits the results via CAN OE to the test computer for display.

[0064] In related technologies, current solutions for voice call functionality require human intervention to determine if the function is functioning correctly by checking if the microphone input and audio output sources are consistent. This increases the risk of false positives, introduces human operation and judgment, reduces detection efficiency, and makes it difficult to determine performance parameters. The voice call functionality can be detected by connecting the aforementioned signal generator to the device under test (DUT) as the microphone input, and connecting the signal analyzer to the DUT to receive the audio output.

[0065] In one embodiment of this application, the CAN and USB communication test device includes collecting test results from the device under test via the USB protocol and transmitting the test results to a test PC for display via the CAN protocol.

[0066] like Figure 6 As shown, in the embodiments of this application, USB and CAN are used as data transmission paths for the test items and the computer display, such as... Figure 6 As shown, the test results of the comprehensive tester and signal analyzer are collected via USB, and the test results are transmitted to the test computer for display via CAN. This verifies the functionality of USB and CAN communication, simplifies the complexity of the test system, and reduces the cost of the test system.

[0067] In one embodiment of this application, the comprehensive tester further includes a compensation circuit, wherein the device under test is first tested through the compensation circuit and then through the comprehensive tester.

[0068] Considering that there is a connection between the VT-BOX vehicle terminal and the comprehensive test instrument, which causes signal attenuation, the comprehensive test instrument needs to be configured to compensate for the attenuation before starting the test.

[0069] In one embodiment of this application, the peripheral docking device further includes a CAN OE detection circuit for sending test results to a test PC.

[0070] Please refer to Figure 2 The VT-BOX vehicle terminal sends the judgment results to the test computer for display via CAN OE, including but not limited to the test results from RF communication test equipment, T1 communication test equipment, voice call test equipment, CAN and USB communication test equipment.

[0071] In one embodiment of this application, it further includes: a test PC, which serves as a display device to display the test results.

[0072] Please refer to Figure 2 The test PC is used to display the test results, which can intuitively show the test results of the VT-BOX vehicle terminal in the production line.

[0073] An embodiment of this application also provides an automated testing system, wherein the aforementioned test circuit is used. The circuit includes a device under test (DUT), a test fixture, and peripheral interface devices. The DUT is connected to the peripheral interface devices via the test fixture. The peripheral interface devices include at least one of the following: radio frequency communication test devices, T1 communication test devices, voice call test devices, CAN and USB communication test devices. The test fixture supplies power to the DUT and connects the external communication interface of the DUT to the peripheral interface devices. The DUT includes a VT-BOX vehicle-mounted device.

[0074] In one embodiment of this application, after the VT-BOX vehicle-mounted device is powered on, it connects to the radio frequency communication testing equipment to test the V2X communication function, network communication function, and GNSS positioning function.

[0075] After connecting to the T1 communication test equipment, the vehicle Ethernet communication function was tested;

[0076] The voice call function was tested after connecting to the voice call test device.

[0077] After connecting to the CAN and USB communication test equipment, the CAN communication and USB communication functions are tested.

[0078] In one embodiment of this application, the radio frequency communication test equipment includes a comprehensive tester and a USB hub circuit.

[0079] The device under test is connected to the comprehensive test instrument via any one or more of the following interfaces: V2X interface, 5G interface, and GNSS interface.

[0080] The V2X interface and the 5G interface transmit at the standard transmission power, and the comprehensive test instrument receives the received radio frequency parameters and tests and judges them.

[0081] The GNSS interface is simulated by the comprehensive test instrument to send fixed-power fixed-point location information. The device under test is tested to determine whether it can receive GNSS signals normally and completes positioning when it can receive signals normally.

[0082] The device under test is connected to the USB HUB circuit, and the test results are sent to the device under test via USB.

[0083] The device under test is connected to the CAN OE detection circuit to send the judgment result to the test PC for display.

[0084] In one embodiment of this application, the T1 communication test device includes a T1 counterpart device.

[0085] The device under test is connected to the device on the opposite side of T1, which includes another VT-BOX vehicle-mounted device or a standard Ethernet test device.

[0086] In one embodiment of this application, the voice call testing device includes a signal generator and a signal analyzer.

[0087] The signal generator is connected to the device under test and is used as a microphone input.

[0088] The signal analyzer is connected to the device under test to receive audio output;

[0089] The device under test is connected to the USB hub circuit, and the test results are sent to the device under test via USB.

[0090] In one embodiment of this application, the CAN and USB communication test device includes

[0091] Test results are collected from the device under test via the USB protocol;

[0092] The test results are transmitted to the test PC for display via the CAN protocol.

[0093] In one embodiment of this application, it further includes a compensation circuit, wherein the device under test first passes through the compensation circuit before entering the comprehensive test instrument.

[0094] In one embodiment of this application, the peripheral docking device further includes a CAN OE detection circuit for sending test results to a test PC.

[0095] In one embodiment of this application, it further includes: a test PC, which serves as a display device to display the test results.

[0096] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A test circuit, wherein, The circuit includes a device under test (DUT), a test fixture, and peripheral interface devices. The DUT is connected to the peripheral interface devices via the test fixture. The peripheral docking equipment includes at least one of the following: radio frequency communication testing equipment, T1 communication testing equipment, voice call testing equipment, CAN and USB communication testing equipment; The test fixture supplies power to the device under test and connects the external communication interface of the device under test to the peripheral docking device; The device under test includes the VT-BOX vehicle-mounted equipment.

2. The circuit as described in claim 1, wherein, After being powered on, the VT-BOX vehicle-mounted equipment is connected to the radio frequency communication testing equipment to test its V2X communication function, network communication function, and GNSS positioning function. After connecting to the T1 communication test equipment, the vehicle Ethernet communication function was tested; The voice call function was tested after connecting to the voice call test device. After connecting to the CAN and USB communication test equipment, the CAN communication and USB communication functions are tested.

3. The circuit as described in claim 1, wherein, The radio frequency communication test equipment includes a comprehensive tester and a USB hub circuit. The device under test is connected to the comprehensive test instrument via any one or more of the following interfaces: V2X interface, 5G interface, and GNSS interface. The V2X interface and the 5G interface transmit at the standard transmission power, and the comprehensive test instrument receives the received radio frequency parameters and tests and judges them. The GNSS interface is simulated by the comprehensive test instrument to send fixed-power fixed-point location information. The device under test is tested to determine whether it can receive GNSS signals normally and completes positioning when it can receive signals normally. The device under test is connected to the USB HUB circuit, and the test results are sent to the device under test via USB. The device under test is connected to the CAN OE detection circuit to send the judgment result to the test PC for display.

4. The circuit as described in claim 1, wherein, The T1 communication test equipment includes the T1 counterpart device. The device under test is connected to the device on the opposite side of T1, which includes another VT-BOX vehicle-mounted device or a standard Ethernet test device.

5. The circuit as described in claim 3, wherein, The voice call testing equipment includes a signal generator and a signal analyzer. The signal generator is connected to the device under test and is used as a microphone input. The signal analyzer is connected to the device under test to receive audio output; The device under test is connected to the USB hub circuit, and the test results are sent to the device under test via USB.

6. The circuit as claimed in claim 1, wherein, The CAN and USB communication test equipment includes Test results are collected from the device under test via the USB protocol; The test results are transmitted to the test PC for display via the CAN protocol.

7. The circuit as described in claim 3, wherein, The comprehensive tester also includes a compensation circuit, wherein the device under test is first tested through the compensation circuit and then through the comprehensive tester.

8. The circuit as claimed in claim 1, wherein, The peripheral docking equipment also includes a CAN OE detection circuit, which sends the test results to the test PC.

9. The circuit as claimed in claim 1, wherein, Also includes: A test PC, which serves as a display device, displays the test results.

10. An automated testing system, wherein, The test circuit described in any one of claims 1 to 9 is used.

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