出租汽车计价器抗干扰问题研究

Research of the EMC on the Taxi-meter

出租汽车计价器经常会出现一些偶发故障。若希望计价器能稳定地工作,就要对计价器的抗干扰问题进行研究,采取相应措施,包括电源干扰抑制技术、分散供电和DC/DC变换器、灭弧技术、配置去耦电容、光耦隔离、接地和布线技术。

Some faults happen in taxi price-meter. If we hope taxi price-meter can work reliably, we must study the EMC and take some measures, such as rejection technique of electrical source disturbance, distributing power supply and DC/DC converter, technique of annihilating high velocity arc, setting the capacitance that rule out the coupling, photoelectric coupler circuit, earthing and route design.