Fast and intelligent identification method of wire harness relationship based on analog switch switching

Abstract

The invention discloses a quick intelligent identification method for a wire harness relationship based on analog switching. The quick intelligent identification method comprises the steps of performing channel switching by means of an analog switch; successively selecting wire harness points as excitation points; and when one wire harness point is selected as an excitation point, acquiring all wire harness points which are conducted with the wire harness point. The quick intelligent identification method has advantages of greatly improving wire harness conduction testing speed, realizing intelligent identification on the wire harness relationship, greatly improving comprehensiveness in wire harness testing, reducing artificial testing cost and improving process in wire harness testing. Furthermore, because a four-wire system is utilized for measurement, wire harness conduction testing precision is higher than that of a traditional two-wire-system testing. No sound is generated in analog switching, thereby eliminating noise in switching of a mechanical relay.

Description

technical field [0001] The invention relates to the technical field of wire harness testing, in particular to a fast and intelligent identification method for wire harness relationships based on analog switch switching. Background technique [0002] Traditional wiring harness testers often use mechanical relays to switch switches. Since the single action time of mechanical relays usually takes ms, channel switching in wiring harness testing often requires multiple relays to cooperate to close the action, so the switching speed is often at 100 points Below / s, it will not exceed 200 points / s in extreme cases. At the same time, frequent switching of mechanical relays will seriously affect its life. In the process of wire harness relationship identification, traditional methods often measure the resistance between two points through the predefined core wire relationship to determine its on, off, and short states. With this method, if you want to identify the relationship and ...

AI Technical Summary

Problems solved by technology

With this method, if you want to identify the relationship and state between all points, you need N 2 (N is the total number of points of the wire harness) measurement, calculated by testing 100 points of wire harness at a speed of 100 points / s, it takes 100s

In large and complex electronic equipment, the number of wiring harness points is often thousands or even tens of thousands, the recognition time is too long, and there is not much operability

Therefore, in actual use, users often only test the existing conduction relationship according to the predefined core wire relationship. The path, open circuit, and short circuit between two points can only be tested separately according to the needs, and it is impossible to realize the connection between each point of the harness. Intelligent recognition of on-off, short-term relationships

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