Line testing device

Abstract

The invention provides a line testing device, which comprises a box body with a front panel and a rear panel, a first excitation voltage output port, a feedback voltage input port, a first CAN port and a second CAN port are arranged on the front panel, and a first power interface, a second excitation voltage output port, a third CAN port and a fourth CAN port are arranged on the rear panel; the voltage conversion module and the terminal strip are arranged in the box body, the voltage conversion module is connected with the first power interface to supply power to the ADDA module, the five AD modules and the wheel speed monitoring board card which are arranged in the box body, the ADDA module is connected with the second excitation voltage output port and is connected with the first excitation voltage output port through the terminal strip, and the ADDA module is connected with the first excitation voltage output port through the terminal strip. The first CAN port is connected with the third CAN port and is provided with a first common end, the second CAN port is connected with the fourth CAN port and is provided with a second common end, the ADDA module and the five AD modules are connected with the first common end, and the wheel speed monitoring board card is connected with the second common end. According to the invention, the problems of inconvenient operation and low efficiency existing in the connection reliability test of the internal lines of the load box and the fault injection box in the prior art can be solved.

Description

Technical Field

[0001] The present invention belongs to the field of automated testing, and more specifically, relates to a circuit testing device. Background Art

[0002] At present, the internal architecture of automotive chassis electronic control system testing equipment is developing towards the direction of independent chassis modules. For the chassis modules inside the automotive chassis electronic control system testing equipment, such as load boxes and fault injection boxes, etc., it is necessary to regularly test the connection reliability of the internal circuits. However, when testing the connection reliability of load boxes and fault injection boxes at present, testers need to manually use a multimeter to test the circuit continuity, which is inconvenient to operate, time-consuming, and has low efficiency. Summary of the Invention

[0003] The purpose of the present invention is to solve the problems of inconvenient operation and low efficiency existing in the current testing of the connection reliability of the internal circuits of load boxes and fault injection boxes.

[0004] To achieve the above purpose, the present invention provides a circuit testing device, which includes:

[0005] A box body, the box body has a front panel and a rear panel, a first excitation voltage output port, a feedback voltage input port, a first CAN port, and a second CAN port are arranged on the front panel, and a first power supply interface, a second excitation voltage output port, a third CAN port, and a fourth CAN port are arranged on the rear panel;

[0006] A voltage conversion module and a terminal block arranged in the box body, the voltage conversion module is connected to the first power supply interface and is used to supply power to the ADDA module, the first AD module, the second AD module, the third AD module, the fourth AD module, the fifth AD module, and the wheel speed monitoring board card arranged in the box body,

[0007] The ADDA module is connected to the second excitation voltage output port and is connected to the first excitation voltage output port through the terminal block,

[0008] The first CAN port is connected to the third CAN port and has a first common end, the second CAN port is connected to the fourth CAN port and has a second common end, the ADDA module, the first AD module, the second AD module, the third AD module, the fourth AD module, and the fifth AD module are all connected to the first common end, and the wheel speed monitoring board card is connected to the second common end.

[0009] Optionally, a second power supply interface is further arranged on the rear panel, and the second power supply interface is simultaneously connected to the ADDA module, the first AD module, the second AD module, the third AD module, the fourth AD module, the fifth AD module, and the wheel speed monitoring board card.

[0010] Optionally, a first power supply port and a second power supply port are further provided on the rear panel, and both the first power supply port and the second power supply port are connected to the voltage conversion module.

[0011] The beneficial effects of the present invention are as follows:

[0012] When the circuit testing device of the present invention is used to test the continuity of the internal circuits of a load box or a fault injection box, the first excitation voltage output port is connected to the test signal input port of the object to be tested, the feedback voltage input port is connected to the feedback signal output port of the object to be tested, and the first CAN port is connected to the upper computer through a CAN tool. After connecting the test circuit, the upper computer controls the ADDA module to output an excitation voltage through the terminal block and the first excitation voltage output port. The feedback signal output by the object to be tested is received by the ADDA module, the first AD module, the second AD module, the third AD module, the fourth AD module, and the fifth AD module through the feedback voltage input port. The ADDA module, the first AD module, the second AD module, the third AD module, the fourth AD module, and the fifth AD module upload the converted signal to the upper computer through the first CAN port. The upper computer can judge the continuity of each internal circuit of the object to be tested according to the received signal.

[0013] As can be seen from the above, by using the circuit testing device of the present invention, it is possible to automatically realize the reliability test of the internal circuit connection of the load box and the fault injection box, thereby effectively solving the problems of inconvenient operation and low efficiency existing in the existing reliability test of the internal circuit connection of the load box and the fault injection box.

[0014] Other features and advantages of the present invention will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention can be better understood by referring to the following description made in conjunction with the drawings, in which the same or similar reference numerals are used in all the drawings to denote the same or similar components.

[0016] Figure 1 Shows a schematic internal layout diagram of a circuit testing device according to an embodiment of the present invention;

[0017] Figure 2 Shows a schematic layout diagram of the front panel of the box according to an embodiment of the present invention;

[0018] Figure 3 Shows a schematic layout diagram of the rear panel of the box according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to enable those skilled in the art to more fully understand the technical solution of the present invention, the exemplary embodiments of the present invention will be described more comprehensively and in detail below with reference to the accompanying drawings. Obviously, one or more of the embodiments of the present invention described below are merely one or more of the specific ways to implement the technical solution of the present invention, and are not exhaustive. It should be understood that other ways belonging to a general inventive concept can be used to implement the technical solution of the present invention, and should not be limited by the exemplary embodiments described. Based on one or more embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0020] Embodiment: Figure 1 The internal layout diagram of the line test device according to the embodiment of the present invention is shown. Figure 2 The layout diagram of the front panel of the box according to the embodiment of the present invention is shown. Figure 3 The layout diagram of the rear panel of the box according to the embodiment of the present invention is shown.

[0021] Referring to Figures 1-3 , the line test device according to the embodiment of the present invention includes:

[0022] A box body 100, the box body has a front panel 110 and a rear panel 120. A first excitation voltage output port 111, a feedback voltage input port 112, a first CAN port 113 and a second CAN port 114 are provided on the front panel 110, and a first power supply interface 121, a second excitation voltage output port 122, a third CAN port 123 and a fourth CAN port 124 are provided on the rear panel 120;

[0023] A voltage conversion module 200 and a terminal block 300 provided in the box body 100, the voltage conversion module 200 is connected to the first power supply interface 121 and is used to supply power to the ADDA module 410, the first AD module 420, the second AD module 430, the third AD module 440, the fourth AD module 450, the fifth AD module 460 and the wheel speed monitoring board 500 provided in the box body 100.

[0024] The ADDA module 410 is connected to the second excitation voltage output port 122 and is connected to the first excitation voltage output port 111 through the terminal block 300.

[0025] The first CAN port 113 is connected to the third CAN port 123 and has a first common end. The second CAN port 114 is connected to the fourth CAN port 124 and has a second common end. The ADDA module 410, the first AD module 420, the second AD module 430, the third AD module 440, the fourth AD module 450, and the fifth AD module 460 are all connected to the first common end. The wheel speed monitoring board 500 is connected to the second common end.

[0026] Specifically, in the embodiment of the present invention, the ADDA module 410 adds a DA voltage output function on the basis of the function of the AD module. The ADDA module can output an adjustable DA voltage under the instruction of the host computer. The ADDA module 410 and each AD module can test 8 channels of voltage. Therefore, the circuit test device in the embodiment of the present invention can test up to 48 circuits at most. Generally, the ECU connector of the vehicle chassis electronic control system is 46pin. Therefore, the circuit test device in the embodiment of the present invention can meet the circuit test requirements of the load box and the fault injection box. The voltage conversion module 200 is used to convert the input AC voltage into a 12V DC voltage.

[0027] Specifically, when the circuit test device in the embodiment of the present invention is used to test the on-off of the internal circuit of the load box or the fault injection box, the first excitation voltage output port 111 is connected to the test signal input port of the object to be tested, the feedback voltage input port 112 is connected to the feedback signal output port of the object to be tested, and the first CAN port 113 or the third CAN port 123 is connected to the host computer through a CAN tool. After connecting the test circuit, the host computer controls the ADDA module 410 to output an excitation voltage through the terminal block 300 and the first excitation voltage output port 111. The feedback signal output by the object to be tested is received by the ADDA module 410, the first AD module 420, the second AD module 430, the third AD module 440, the fourth AD module 450, and the fifth AD module 460 through the feedback voltage input port 112. The ADDA module 410, the first AD module 420, the second AD module 430, the third AD module 440, the fourth AD module 450, and the fifth AD module 460 upload the converted signal to the host computer through the first CAN port 113 or the third CAN port 123. The host computer can judge the on-off of each circuit inside the object to be tested according to the received signal.

[0028] Specifically, the circuit test device in the embodiment of the present invention can also be used for the function test of the relay board and the wheel speed board of the load box, and the test of the pull-up and pull-down fault functions of the fault injection box.

[0029] When performing a functional test on the relay board for the load box, connect the first CAN port 113 and the second CAN port 114 to the corresponding channels of the CAN tool respectively, and connect the feedback voltage input port 112 to the corresponding port of the load box through an EDAC to banana head cable. After connecting the test circuit, run the test software on the host computer to perform the relay board test.

[0030] When performing a functional test on the wheel speed board for the load box, connect the second CAN port 114 to the corresponding channel of the CAN tool, connect the fourth CAN port 124 to the CAN port of the load box, and then connect the load box to the CAN tool. During the test, the host computer sends a test command to the wheel speed board of the load box through the CAN tool, and the wheel speed board sends the feedback signal to the wheel speed monitoring board 500, and the wheel speed monitoring board 500 sends the collected signal back to the host computer.

[0031] When performing a test on the pull-up and pull-down fault functions of the fault injection box, connect the second excitation voltage output port 122 to the corresponding port of the fault injection box, and control the ADDA module 410 to output the corresponding excitation voltage through the host computer to test the pull-up and pull-down fault functions of the fault injection box. Testing the pull-up and pull-down fault functions of the fault injection box requires injecting PVCC voltage from the outside. Connect the ResV-6PCSPIN pin of the line test device to the ResV-6PCSPIN pin of the fault injection box, and use the DA function of the ADDA module 410 to output voltages with different values.

[0032] Furthermore, in the embodiment of the present invention, a second power interface 125 is further provided on the rear panel 120, and the second power interface 125 is connected to the ADDA module 410, the first AD module 420, the second AD module 430, the third AD module 440, the fourth AD module 450, the fifth AD module 460, and the wheel speed monitoring board 500 at the same time.

[0033] Specifically, in the embodiment of the present invention, the second power interface 125 is used to connect to a 12V DC power supply.

[0034] Still further, in the embodiment of the present invention, a first power supply port 126 and a second power supply port 127 are further provided on the rear panel 120, and both the first power supply port 126 and the second power supply port 127 are connected to the voltage conversion module 200.

[0035] Specifically, in the embodiment of the present invention, both the first power supply port 126 and the second power supply port 127 are used to output 12V DC voltage. During the test, when the load box or the fault injection box needs to be powered by an external power supply, the line test device can be used to supply power to it.

[0036] Further, the circuit testing device according to the embodiment of the present invention further includes an air switch 600 disposed in the box body 100, and the air switch 600 is used to control the on-off of the power supply lines of the ADDA module 410, the first AD module 420, the second AD module 430, the third AD module 440, the fourth AD module 450, the fifth AD module 460, and the wheel speed monitoring board 500.

[0037] Although one or more embodiments of the present invention have been described above, those of ordinary skill in the art should understand that the present invention can be implemented in any other form without departing from its gist and scope. Therefore, the above-described embodiments are illustrative rather than restrictive, and many modifications and substitutions are obvious to those of ordinary skill in the art without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A line testing device, characterized in that: Used to test the continuity of the internal circuits of the load box and fault injection box belonging to the automobile chassis electronic control system test equipment; The line testing device comprises: A box body, the box body having a front panel and a rear panel, the front panel is provided with a first excitation voltage output port, a feedback voltage input port, a first CAN port and a second CAN port, and the rear panel is provided with a first power supply interface, a second excitation voltage output port, a third CAN port and a fourth CAN port; A voltage conversion module and a terminal block are arranged in the box, and the voltage conversion module is connected to the first power interface, and is used to supply power to the ADDA module, the first AD module, the second AD module, the third AD module, the fourth AD module, the fifth AD module and the wheel speed monitoring board arranged in the box, The ADDA module is connected to the second excitation voltage output port and is connected to the first excitation voltage output port through a terminal block. The first CAN port is connected to the third CAN port and has a first common end, the second CAN port is connected to the fourth CAN port and has a second common end, the ADDA module, the first AD module, the second AD module, the third AD module, the fourth AD module and the fifth AD module are all connected to the first common end, and the wheel speed monitoring board is connected to the second common end.

2. The line testing device according to claim 1, characterized in that: A second power interface is also provided on the rear panel, and the second power interface is simultaneously connected to the ADDA module, the first AD module, the second AD module, the third AD module, the fourth AD module, the fifth AD module and the wheel speed monitoring board.

3. The line testing device according to claim 2, characterized in that: The rear panel is also provided with a first power supply port and a second power supply port, and both the first power supply port and the second power supply port are connected to the voltage conversion module.

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