Automatic test system for testing reliability of fault simulation circuit

Abstract

The utility model belongs to the technical field of circuit testing, and particularly relates to an automatic testing system for testing the reliability of a fault simulation circuit, which comprises an NGI programming power supply for supplying power to the whole circuit; the PC is configured to obtain one or more test instructions and generate corresponding simulation test signals; the utility model discloses a hardware interface board card of a VT System and an integrated case. The hardware interface board card of the VT System comprises a VT7001, a VT2820 and a VN1640. The VT7001 realizes three-path output through script control so as to simulate an automobile KL30, an automobile KL15 and an automobile GND and realize power supply of a DUT; the VT2820 controls the on-off of the KL30 through a script, and short circuit to a power supply and to the ground is realized; controlling on-off of a KL15, short-circuiting a power supply to the ground, controlling on-off of the ground, and short-circuiting the power supply to the ground; and the VN1640 is a CAN (Controller Area Network) network interface module. The automatic test system for testing the reliability of the fault simulation circuit has the effects of reducing test links, reducing test devices and improving the test accuracy.

Description

Technical Field

[0001] This utility model belongs to the technical field, specifically relating to an automated testing system for reliability testing of fault simulation circuits. Background Technology

[0002] As automotive functions continue to increase, more and more electronic control units (ECUs) are being introduced into vehicles. However, with rising demands for safety and comfort, higher requirements are being placed on the stability and reliability of ECUs. Therefore, testing the stability and reliability of ECUs is becoming increasingly important.

[0003] Fault testing is a crucial component of power supply circuit reliability testing. During testing, configurable interference is first injected into the power supply circuit to simulate and realize different errors and fault conditions that may occur in the device under test or the power supply circuit. The purpose is to obtain information about the circuit's operation under these fault conditions and its recovery capability. Fault testing includes short-circuit and open-circuit tests.

[0004] In existing technologies, fault testing for short circuits, open circuits, and other faults requires multiple testing devices, which not only makes the overall testing process lengthy but also results in a large number of testing devices, affecting the accuracy of the test. Utility Model Content

[0005] The purpose of this invention is to provide an automated testing system for reliability testing of fault simulation circuits, in order to solve the technical problem that the overall testing process is lengthy and involves numerous testing devices, which affects the accuracy of the test. The system aims to reduce the number of testing steps and devices and improve the accuracy of the test.

[0006] To address the aforementioned technical problems, this utility model provides an automated testing system for reliability testing of fault simulation circuits, comprising:

[0007] The NGI programming power supply powers the entire circuit.

[0008] A PC computer is configured to acquire one or more test commands and generate corresponding simulated test signals.

[0009] The hardware interface boards and integrated chassis of the VT System, wherein the hardware interface boards of the VT System include VT7001, VT2820 and VN1640;

[0010] The VT7001 achieves three-channel output through script control to simulate automotive KL30, KL15, and GND, thereby powering the DUT.

[0011] The VT2820 controls the on / off state of KL30, and the short circuit to power supply and ground via scripts; it also controls the on / off state of KL15, and the short circuit to power supply and ground; and controls the on / off state of ground, and the short circuit to power supply and ground.

[0012] The VN1640 is a CAN network interface module that provides four CAN network interfaces. It connects to the CAN interface of the object under test, simulates the CAN network signals required by the object under test, and simultaneously acquires the CAN network signals output by the object under test.

[0013] Furthermore, the KL30 controls the K1 switch through the CAPL script to open and close channel 1_a and channel 1_b, thereby controlling the on / off state of the KL30.

[0014] The KL30 controls the K2 switch through the CAPL script to open and close channel 1_a and busbar a, and to short-circuit the KL30 with the power supply and exit the short circuit.

[0015] The KL30 controls the K3 switch via the CAPL script to open and close channel 1_a and busbar b, and to short-circuit the KL30 to ground and exit the short circuit.

[0016] Furthermore, the KL15 controls the K4 switch via the CAPL script to open and close channel 2_a and channel 2_b, thereby controlling the on / off state of the KL15.

[0017] The KL15 controls the K5 switch via the CAPL script to open and close channel 2_a and busbar a, thereby achieving short circuit between KL15 and the power supply and exiting the short circuit.

[0018] The KL15 controls the K6 switch via the CAPL script to open and close channel 2_a and busbar b, and to short-circuit the KL15 to ground and exit the short circuit.

[0019] Furthermore, the GND controls the K7 switch via the CAPL script to open and close channel 3_a and channel 3_b, thereby controlling the on / off state of the GND.

[0020] The GND controls the K8 switch via the CAPL script to open and close channel 3_a and busbar a, thereby achieving a short circuit between GND and the power supply and exiting the short circuit.

[0021] The GND controls the K9 switch via the CAPL script to open and close channel 3_a and busbar b, thereby achieving a short circuit between GND and ground and exiting the short circuit.

[0022] Furthermore, the VN1640 network interface module is connected to the object under test via a CAN interface signal adapter box.

[0023] The beneficial effects of this utility model are:

[0024] 1. The VT7001 is used to control three outputs to simulate automotive KL30, KL15, and GND, thus providing power to the DUT. The VT2820 is used to control the three outputs to achieve open circuit, short circuit to power supply, and short circuit to ground, thereby automating the control of the circuit status, reducing tedious wiring operations, reducing personnel testing time, and improving testing efficiency.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the automated test system for reliability testing of fault simulation circuits according to this utility model;

[0028] Figure 2 This is a circuit diagram of the KL30 open-circuit and short-circuit implementation of the automated test system for reliability testing of fault simulation circuits according to this utility model.

[0029] Figure 3 This is a circuit diagram of the KL15 circuit breaking and short circuit implementation of this utility model;

[0030] Figure 4 This is a circuit diagram illustrating the GND open-circuit and short-circuit implementation of this utility model. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model 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 this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Example:

[0033] like Figures 1 to 4 As shown, an automated test system for reliability testing of fault simulation circuits includes: an NGI programming power supply for powering the entire circuit; a PC configured to acquire one or more test commands and generate corresponding analog test signals; hardware interface boards and an integrated chassis for the VT System, wherein the hardware interface boards of the VT System include VT7001, VT2820 and VN1640; the VT7001 implements three outputs through script control to simulate automotive KL30, KL15 and GND to power the DUT.

[0034] Among them, VT2820 controls the on / off state of KL30 and short-circuit it to power and ground via scripts; controls the on / off state of KL15 and short-circuit it to power and ground; and controls the on / off state of ground and short-circuit it to power and ground. VN1640 is a CAN network interface module, which provides 4 CAN network interfaces, connects to the CAN interface of the object under test, simulates the CAN network signals required by the object under test, and simultaneously collects the CAN network signals output by the object under test.

[0035] KL30 controls the K1 switch through the CAPL script to open and close channel 1_a and channel 1_b, thus turning KL30 on and off. The time increment can be 0.000001 (1µs) to 0.065 (65 ms), which can be used to simulate the rapid on and off of KL30 and simulate extreme working conditions.

[0036] KL30 controls the K2 switch via CAPL scripts to open and close channel 1_a and busbar a, achieve short circuit between KL30 and power supply and exit short circuit; simulate KL30 hardware faults, enabling convenient and rapid detection and shortening detection time.

[0037] The KL30 uses a CAPL script to control the K3 switch, enabling the opening and closing of channel 1_a and busbar b, and facilitating short circuits between the KL30 and ground, as well as short circuit exit. This allows for the simulation of KL30 hardware faults, facilitating convenient and rapid detection and reducing testing time.

[0038] like Figures 1 to 4 As shown, KL15 controls switch K4 via CAPL script to open and close channel 2_a and channel 2_b, thus enabling KL15 to switch on and off. The time increment can be 0.000001 (1µs) to 0.065 (65 ms), which can be used to simulate the rapid switching of KL15 and simulate extreme working conditions.

[0039] KL15 controls the K5 switch via CAPL scripts to open and close channel 2_a and busbar a, achieve short circuit between KL15 and power supply, and exit short circuit; it also simulates KL15 hardware faults, enabling convenient and rapid detection and shortening detection time.

[0040] The KL15 uses a CAPL script to control the K6 switch, opening and closing channel 2_a and busbar b, and achieving short circuits between the KL15 and ground, as well as de-short circuit removal. This simulates KL15 hardware faults, enabling convenient and rapid detection and reducing testing time.

[0041] like Figures 1 to 4 As shown, GND controls switch K7 via CAPL script to open and close channel 3_a and channel 3_b, thus enabling GND to switch on and off. The time increment can be 0.000001 (1µs) to 0.065 (65 ms), which can be used to simulate rapid switching of GND and simulate extreme operating conditions.

[0042] GND controls the K8 switch via CAPL script to open and close channel 3_a and busbar a, achieve short circuit between GND and power supply and exit short circuit; simulate GND hardware faults, enabling convenient and rapid detection and shortening detection time.

[0043] GND uses a CAPL script to control the K9 switch, opening and closing channel 3_a and busbar b, achieving short circuit between GND and ground, and reversing the short circuit. This simulates GND hardware faults, enabling convenient and rapid detection and shortening detection time.

[0044] The VN1640 network interface module connects to the object under test via a CAN interface signal adapter box.

[0045] In summary, the VT7001's script control enables three-channel output to simulate automotive KL30, KL15, and GND, thus providing power to the DUT, reducing personnel testing time and improving testing efficiency.

[0046] All the devices selected in this application are general standard parts or components known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0047] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An automated testing system for reliability testing of fault simulation circuits, characterized in that, include: The NGI programming power supply powers the entire circuit. A PC computer is configured to acquire one or more test commands and generate corresponding simulated test signals. The hardware interface boards and integrated chassis of the VT System, wherein the hardware interface boards of the VT System include VT7001, VT2820 and VN1640; The VT7001 achieves three-channel output through script control to simulate automotive KL30, KL15, and GND, thereby powering the DUT. The VT2820 controls the on / off state of KL30, and the short circuit to power supply and ground via scripts; it also controls the on / off state of KL15, and the short circuit to power supply and ground; and controls the on / off state of ground, and the short circuit to power supply and ground. The VN1640 is a CAN network interface module that provides four CAN network interfaces. It connects to the CAN interface of the object under test, simulates the CAN network signals required by the object under test, and simultaneously acquires the CAN network signals output by the object under test.

2. The automated testing system for reliability testing of fault simulation circuits as described in claim 1, characterized in that, The KL30 controls the K1 switch through the CAPL script to open and close channel 1_a and channel 1_b, thereby controlling the on / off state of the KL30. The KL30 controls the K2 switch through the CAPL script to open and close channel 1_a and busbar a, and to short-circuit the KL30 with the power supply and exit the short circuit. The KL30 controls the K3 switch via the CAPL script to open and close channel 1_a and busbar b, and to short-circuit the KL30 to ground and exit the short circuit.

3. The automated testing system for reliability testing of fault simulation circuits as described in claim 2, characterized in that, The KL15 controls the K4 switch via the CAPL script to open and close channel 2_a and channel 2_b, thereby controlling the on / off state of the KL15. The KL15 controls the K5 switch via the CAPL script to open and close channel 2_a and busbar a, and to short-circuit the KL15 with the power supply and exit the short circuit. The KL15 controls the K6 switch via the CAPL script to open and close channel 2_a and busbar b, and to short-circuit the KL15 to ground and exit the short circuit.

4. The automated testing system for reliability testing of fault simulation circuits as described in claim 3, characterized in that, The GND controls the K7 switch via the CAPL script to open and close channel 3_a and channel 3_b, thereby controlling the on / off state of the GND. The GND controls the K8 switch via the CAPL script to open and close channel 3_a and busbar a, and to short-circuit GND with the power supply and exit the short circuit. The GND controls the K9 switch via the CAPL script to open and close channel 3_a and busbar b, and to short-circuit GND to ground and exit the short circuit.

5. The automated testing system for reliability testing of fault simulation circuits as described in claim 4, characterized in that, The VN1640 network interface module is connected to the object under test via a CAN interface signal adapter box.

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