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System and method for testing multiplexing signals sent out by vehicle-mounted instrument

A technology of multiplexing and testing system, applied in the field of vehicle-mounted instrument detection, can solve the problems of large screening workload, poor reliability and low accuracy, and achieve the effect of solving the problem of insufficient manpower, wide application range and good flexibility

Pending Publication Date: 2022-04-12
HUIZHOU DESAY SV AUTOMOTIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of the existing traditional testing method for multiplexing signals sent out by on-board instruments, which are heavy in workload, prone to errors and omissions, low in precision, poor in reliability and low in efficiency, the present invention provides a method for testing the multiplexed signals sent out by in-vehicle instruments. System and method for testing multiplexed signals

Method used

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  • System and method for testing multiplexing signals sent out by vehicle-mounted instrument

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Experimental program
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Embodiment 1

[0038] This embodiment discloses a test system for the multiplexed signal sent out by the vehicle instrument, such as figure 1 Shown: It includes a PC with built-in NI LabVIEW software, an integrated board, a vehicle instrument and a programmable power supply; one end of the integrated board is directly connected to the PC, the other end is connected to the vehicle instrument under test, and one end of the programmable power supply is connected to the The PC is connected, and the other end is connected to the integrated board; the PC is used to simulate the input source that each electronic controller unit of the real vehicle has an influence on the external signal of the vehicle instrument, and the integrated board is used to simulate the hard wire signal of the real vehicle, which is programmable The power supply is used to simulate the real vehicle power supply.

[0039] In this embodiment, the specific implementation process of the system is as follows: the PC simulates th...

Embodiment 2

[0046] This embodiment discloses a method for testing the multiplexed signal sent by the on-board instrument. The method is based on the test system for the multiplexed signal sent by the on-board instrument in Embodiment 1. The method includes the following step:

[0047] S10. The control system of the PC simulates the input source of each electronic controller unit of the actual vehicle that affects the external signal of the vehicle instrument and sends it to the integrated board.

[0048] In this step, the PC is used as a carrier, equipped with NI LabVIEW software programming to form the control domain of the system of this embodiment.

[0049] S20. The integrated board simulates the corresponding input source signal according to the input source simulated by the control system and sends it to the on-board instrument.

[0050] This step is specifically, the control system controls the integrated board to simulate the corresponding input source signal according to the inpu...

Embodiment 3

[0068] This embodiment discloses a computer-readable storage medium, and the computer-readable storage medium includes a stored computer program, wherein, when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the method described in Embodiment 2. The test method of the multiplexed signal sent out by the vehicle instrument.

[0069] In this embodiment, the computer program stored in the computer-readable storage medium includes NI LabVIEW software.

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Abstract

The invention relates to a system and a method for testing multiplexing signals transmitted by a vehicle-mounted instrument. The system comprises a PC (Personal Computer), an integrated board card and the vehicle-mounted instrument, the PC is connected with the integrated board card and is used for simulating an input source which influences the outgoing signal of the vehicle-mounted instrument by each electronic controller unit of a real vehicle and sending the input source to the integrated board card, and the integrated board card is connected with the vehicle-mounted instrument and is used for simulating an input source signal and sending the input source signal to the vehicle-mounted instrument; the vehicle-mounted instrument sends a multiplexing signal to the PC through the integrated board card after receiving the simulated input source signal, and the PC is also used for extracting the received multiplexing signal in real time to obtain test data of a corresponding position of a corresponding path required by the vehicle-mounted instrument so as to automatically judge a test result. According to the invention, multiple paths of data can be extracted at the same time and visually displayed on a panel, and specified data of a specific path can also be automatically extracted, so that the problems of difficulty in screening and omission in a traditional manual test are solved, and the test quality and the test efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of on-board instrument detection, in particular to a testing system and method for multiplexed signals sent out by the on-board instrument. Background technique [0002] The multiplexed signal refers to a signal with a length of 0-8 bytes contained in the same frame message. The traditional test methods for external signals of on-board instruments are mostly for static types of signals. For multiplexed signals, all the messages with the same ID can only be found through CAN tools, and then the signal data of different channels can be manually screened. [0003] There are the following problems in the screening process: 1. There are multiple signal transmissions on the same physical channel, and it is difficult to sort each signal clearly; 2. Each signal changes frequently, and it is impossible to quickly identify whether the acquired signal value is the latest value; 3. Each frame of message corresponds to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00H04J99/00
Inventor 钟笔快李平
Owner HUIZHOU DESAY SV AUTOMOTIVE