国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

The reliability of the AC filament conversion relay is vital to the safe operation of the railway color light signal machine, and the conversion time is an important parameter reflecting its reliability. In view of the problem of low accuracy of current measuring methods, the article proposes a conversion time extraction method based on the least square method and the improved fast amplitude calculation method. Taking a type of ac filament conversion relay as the research object, a parameter acquisition system is built to complete the acquisition of coil current and contact voltage. Fit the coil current by the least square method and obtain the optimal parameters, the coil power-off model was established to obtain the release time, then use the improved fast amplitude calculation method to transform the contact voltage to obtain the contact bounce time. Finally, through several measurements, combined with the high-speed camera to shoot the contact moving image sequence, the analysis results show that the measurement accuracy can be controlled within 1%, which meets the design requirements of the conversion time detection.