The Study Of A Magneto Real Time Measure System

This task rooted in the actual application of the detection station of Jialing Industry Stock Company. It is a set of detection system for multi-parameters timely-detection which aims at the motorcycle magneto. This system can take the measurement of the wave and datum for the magneto characteristic parameters, including calculating and analyzing these parameters .The magneto is the primary device to supply the power for the motorcycle. The main use of it is that it can provide ignition energy for ignition system and make engine run. The primary performance target by which the superior and inferior quality of the ignition system can be judged includes ignition advance angle,unload voltage of secondary coil and ignition energy, etc. All of these can acquire through measuring the characteristic parameter of magneto.The previous means of magneto performance detection is observations and discretion with manual work. That is inefficient,and costs too long time. When measuring the magneto performance parameter,we find that the instrument which use to measure voltage and current is still the simple voltmeter and amperemeter in the national standard, and the form of wave that we observed is anomaly. Based on the measure principles, it obviously can't be used to do quantitative analysisï¼›Because the discharge process of ignition system is quite complex, accompanies with very strong electromagnetism interference, and the ignition current and voltage are variable,it make the measure of ignition energy become a difficult thing of ignition system performance detection. The system adopt anti-interference technique such as shield, insulation etc, and applies the methods of software filter and digital signals process to insure the accuracy and the stability . This article states the aspects of the measure principle, general design, hardware design and software design, and so on. After the acquirement analysis of the system, the author has not only completed the setup of the system and hardware design, but also ensured the measure principle. The innovation of this paper includes:1) On the measure principle, author broke through the stipulation of the current regulation rule, analyzed the problem of original measure method, and suggested that we should take the virtual value principle to measure the irregular wave .2) On the method of measure, the match inspect principle had been apply in theactual measure successfully, which improved the accuracy and economized the cost of hardware.A set of this system has run past half a year in the Jialing Industry Stock Company. Because of the standing circumstance of the usage, it can be spread and applied in the companies for the producing and usage of the magneto. It provides a advanced examination equipments for the examination and control of magneto product quality.