Wiring detection method and detection system

Abstract

An embodiment of the invention discloses a wiring detection method and a wiring detection system. The wiring detection method comprises the steps of: acquiring voltage signals generated by an magnetoelectric sensor within at least one period; generating square wave signals according to the voltage signals; acquiring a variation law of the voltage signals within a preset time after a moment of arrival of falling edges of the square wave signals; and determining that positive and negative wiring of the magnetoelectric sensor is normal when the variation law satisfies a preset condition. The wiring detection method and the wiring detection system solve the problem of positive and negative wiring detection of the magnetoelectric sensor, can detect the fault of inverse connection of positive and negative electrodes, and reduce the difficulty of troubleshooting.

Description

technical field [0001] Embodiments of the present invention relate to engine control technology, and in particular to a wiring detection method and detection system. Background technique [0002] Magnetoelectric sensors are commonly used sensors in engines, and are generally used to detect the phase and rotational speed of crankshaft signal discs and camshaft signal discs. The principle is that when the magnetic flux outside the sensor changes, the voltage value of its output signal conforms to That is, voltage is proportional to the rate of change of magnetic flux. [0003] The camshaft signal disc of the engine has two types: perforated and protruding teeth. The positive and negative wiring modes corresponding to these two signal discs are opposite. It is easy to confuse the positive and negative poles when designing the wiring harness. When the positive and negative poles of the magnetoelectric sensor are connected to the If the timing is reversed, it may cause the eng...

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Problems solved by technology

[0003] The camshaft signal disc of the engine has two types: perforated and protruding teeth. The positive and negative wiring modes corresponding to these two signal discs are opposite. It is easy to confuse the positive and negative poles when designing the wiring harness. When the positive and negative poles of the magnetoelectric sensor are connected to the If the timing is reversed, it may cause the engine to fail to start, difficult to start, without any fault performance (deviation of the actual advance angle), etc., and it is difficult to check

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