一、引言传感器是具有感知某种信息,并使之能以某种形式进行信息传输的一种装置。目前,传感器在测试技术领域内的应用越来越广泛,它是实现自动检测和自动控制的首要环节。如果没有传感器对原始参数进行精确可靠的测量,那末无论信号转换,信息处理,或数据显示和控制,都是一句空话。传感器的种类很多,其中压电式传感器由于频响高,坚固耐用,广泛用于测量压力与振动信号,是非电量测量的重要传感器之一。多年 I. INTRODUCTION A sensor is a device that senses some kind of information and enables it to transmit information in some form. At present, the sensor is more and more widely used in the field of testing technology, which is the primary link to realize automatic detection and automatic control. Without the sensor to make accurate and reliable measurements of the original parameters, no matter whether signal conversion, information processing, or data display and control, is an empty talk. Many types of sensors, including piezoelectric sensors because of the high frequency response, rugged, widely used to measure pressure and vibration signals, non-power measurement is one of the important sensors. for many years