Method used for detecting open circuit of wires with invariable wiring harness in automobile intelligent electronic system

A technology of smart appliances and wires, applied in the direction of measuring electrical variables, circuits or fluid pipelines, instruments, etc., can solve the problem that the wire break position cannot be obtained, and achieve the effect of accurate detection

Active Publication Date: 2009-12-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

The transmission of information and power between networks depends entirely on the connectivity of the wires contained in the wire harness. The existing automotive wire harness tester can detect the connectivity of each wire in the wire harness, but the specific location of the break on the wires is difficult. can not get

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  • Method used for detecting open circuit of wires with invariable wiring harness in automobile intelligent electronic system
  • Method used for detecting open circuit of wires with invariable wiring harness in automobile intelligent electronic system
  • Method used for detecting open circuit of wires with invariable wiring harness in automobile intelligent electronic system

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Embodiment Construction

[0010] The present invention will be described in detail below in conjunction with the embodiments.

[0011] In the CAN / LIN secondary hybrid network detected by the present invention, the constant wiring harness containing multiple wires is divided according to a single network, and the topological shape of the wires in the wiring harness is not a simple linear shape, but a complex topology connected with multiple nodes structure.

[0012] For example: in the CAN / LIN secondary hybrid network, such as figure 1 As shown, the CAN network includes a CAN constant wiring harness 1 including multiple wires, and multiple CAN nodes 3 connected to the CAN constant wiring harness 1 through electrical connectors 2 . The CAN constant wire harness 1 contains 5 wires everywhere, which are divided into signal wires and controller power wires. The CAN node 3 includes a diagnostic CAN node 31, a power supply node 32 and a plurality of other electrical CAN nodes 33, a diagnostic module is pres...

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Abstract

The invention relates to a method used for detecting the open circuit of wires with invariable wiring harness in an automobile intelligent electronic system. The method comprises the following steps: 1) installing a diagnostic module in diagnostic CAN nodes in a CAN in a CAN/LIN (Controller Area Network/Local Interconnect Network) secondary network; 2) converting the structure diagram of the CAN/LIN secondary network into a topological diagram thereof, and pre-setting the topological diagram thereof in the diagnostic module; 3) defining the target nodes in the topological diagram, and pre-setting the defined target nodes in the diagnostic module; 4) locating the target path collection of all the non-target nodes in the topological diagram to corresponding target nodes by the diagnostic module; 5) judging the state of each non-target node by the diagnostic module according to the information sent from other CAN nodes in the CAN and the gateway nodes in the LIN; 6) judging the state of the corresponding edge by the diagnostic module according to step 5); 7) calculating and summing up the failure frequency of each edge by the diagnostic module according to step 6); and 8) locating the edge with the maximum failure frequency as the open-circuit location of the wires according to the step 7), and sending the open-circuit location to the display screen at the diagnostic CAN node for displaying by the diagnostic module. The detection result of the invention is accurate. Therefore, the method can be widely applicable to the line detection of various automobile intelligent electrical systems.

Description

technical field [0001] The invention relates to a detection method of an automobile circuit, in particular to a detection method for a wire disconnection used in a fixed wire harness of an automobile intelligent electrical system. Background technique [0002] In the traditional automotive electrical system, each electrical appliance distributed throughout the car is connected to the driver's switch by two wires. At the same time, the electrical appliances also need to transmit signals through wires. wire. In order to pack the wires in the car into a relatively simple and standard wiring harness, the applicant applied for a Chinese patent application titled "Invariant Wiring Harness Based on Automotive Intelligent Electrical System" in 2008 with the application number 200810115268.4. This patent proposes a wiring harness system based on CAN (Controller Area Network, controller local area network) / LIN (Local Interconnect Network, serial communication network) secondary hybri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02B60R16/02
Inventor 杨殿阁连小珉薛雯罗禹贡郑四发王建强李克强
Owner TSINGHUA UNIV
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