【作者】 温淑慧；

【Author】 Wen Shuhui (Yanshan University, Qinhuangdao 066004)

【机构】 燕山大学；

【摘要】 本文介绍了双差压法检测油罐液位的原理和方法,消除了密度变化而引起的测量误差。提高液位测量的精度;有效地解决光纤传输中发射端与接收端的同步问题;由于测量电路采用的CMOS元器件和脉宽-脉位调制的发射电路是微功耗,为光功率推动提供有利条件。更多还原

【Abstract】 The paper presents a method that employs double-difference pressure to check the hydraulic position of the oilcan,and introduces its foundation principle. The method removes the measurement error which been brought by the change of density and increases the accuracy of the position measurement. Moreover the system circuit resolves the synchronization problem lying in the optical fiber communication and between transmitting and receiving. Among the measuring circuits the PW/M (pulse-width modulation) circuit adopting CMOS components is micro power-wasting. It can been driven by the light power.更多还原