超声管外测压中发射电路的设计  

Design of Emitting Ultrasonic Circuit in Ultrasonic Pressure Measuring Outside Pipe

作　　者：丁丽娟[1] 宋寿鹏[1] 高福学[1] 易立单[1] 

机构地区：[1]江苏大学机械工程学院,江苏镇江212013

出　　处：《仪表技术与传感器》2009年第8期94-96,共3页Instrument Technique and Sensor

基　　金：江苏省博士后科研资助计划项目(0701007C)

摘　　要：为有效地激励超声换能器,在分析现有的超声发射电路的基础上,提出了一种利用电感储能产生高功率脉冲的发射电路。该电路以场效应管为开关元件,由电感储能形成高压尖脉冲。实验测得该电路产生的尖脉冲宽度小于1μs,幅度高达0.1 kV.该电路结构简单,不需提供直流高压,只需5 V单电源供电,安全性高,满足超声管外测压的应用。A novel ultrasonic transmit circuit based on a stored energy inductance is presented in order to excite the ultrasonic transducer effectively after analyzing the existing ultrasonic transmit circuits. This circuit uses the inductance to generate high voltage pulse with the help of field effect transistor. The experimental results show that the sharp pulse with width to be narrower than lus and the amplitude to be more than hundreds voltage. This circuit is simple, but without DC high voltage and only supplied by 5 V single power source and high security advantages can really meet the application of ultrasonic pressure measuring outside pipe.

关 键 词：超声波 发射电路 尖脉冲激励 管外测压 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]