压电传感器在超声振动系统中的设计与应用  

Design and Application of Piezoelectric Sensor in Ultrasonic Vibration System

作　　者：罗晓宁[1] 周兆英[1] 曹群[1] 张毓笠[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084

出　　处：《仪表技术与传感器》2002年第6期6-7,共2页Instrument Technique and Sensor

摘　　要：将压电原理用于实现超声振动系统的频率自动跟踪。在振动系统设计中加入压电传感片 ,压电传感片跟随系统振动 ,并产生感应电压。谐振时 ,感应电压达到最大值 ,搜寻感应电压最大值就能实现频率自动跟踪。压电传感器的设计可以采用四端网络法 ,该方法简单实用。为达到最佳灵敏度 ,应该尽可能让压电传感器靠近振动系统节面位置。压电传感器设计简单 ,实现容易 ,跟踪精度高 ,并且稳定可靠。Using piezoelectric theory to realize the frequency autotracking ofultrasonic vibration system.Piezoelectric pieces are added to vibration system,they vibrate with system together and generate induced voltage.When resonance happens,the induced voltage will reach to its maximum value.Tracking the maximum value can realize the frequency autotracking.Four-terminal network method can be used to design piezoelectric sensor,and it is easy and useful.In order to get the best sensitivity,the piezoelectric sensor should be arranged as near as possible to the nodal surface of vibration system.Piezoelectric sensor is easy to be designed and realized.This method has high tracing precision,and it works very steadily.It can be used to protect cutters.

关 键 词：超声振动系统 压电传感器 自动跟踪 刀具保护 

分 类 号：TG663[金属学及工艺—金属切削加工及机床] TP212[自动化与计算机技术—检测技术与自动化装置]