ICP加速度传感器（调理电路）精密恒流源电路设计.docx

摘 要本文介绍了研究ICP加速度传感器精密恒流源电路设计的意义与目的，分别阐述了恒流源与压电式加速度传感器的发展历程、国内外发展现状以及在多个领域中的应用，简述了理想恒流源和实际恒流源的区别，详尽地介绍了恒流源的原理和评价恒流源的主要性能指标，以及ICP加速度传感器原理和优点。ICP加速度传感器目前已被广泛应用，基于能更好应用ICP加速度传感器的目的，需要为其配备合适的供电电路。本课题开发一种适用于ICP传感器的精密恒流源，可以为各种ICP加速度传感器供电。该供电电路采用了220V的交流供电，经过整流稳压后得到稳定的电压，采用单片集成芯片LM334，利用集成电路恒流源的原理设计恒流模块，为ICP加速度传感器提供的精密恒流。并设计了信号调理的高低通滤波网络，使ICP传感器的输出信号能被A/D采集电路获取。经过仿真和实验检测表明，此电路性能可靠，效果良好。关键词：ICP加速度传感器，信号调理，高低通滤波，恒流源电路 ABSTRACTThis paper introduces the significance and purpose of the study of precision current source circuit design for ICP acceleration sensor , then clarifies the development of domestic and international situation and the application in areas of the constant current source and piezoelectric acceleration sensor. The difference between ideal current source and the actual is presented. And then introduces the principle and the main source of constant evaluation of performance indicators of the Constant current source and ICP acceleration sensor’s principle and advantages.With ICP acceleration sensors being widely used , and for the purpose of better application , a suitable power supply circuit is needed. This topic develops a kind of precision current source which is applicable to the ICP sensor and supply current for it. The power supply circuits is using a 220V power exchange, after rectifier regulator to get stable voltage, uses the principles of integrated circuits current source to design Constant current module with adoption of the LM334,which is a monolithic integrated chip, then provides precision constant current between 2 mA and 10 mA，also designs the level of signal conditioning pass filter network so that the ICP sensor output signal can be A / D acquisition circuit access. Through simulation and experiment show that the performance of this circuit is reliable and the effect is good .Key words: ICP Acceleration Sensors, Signal Conditioner Preamplifier, Precision Current Source, High And Low Pass Filter目 录中文摘要ⅠABSTRACTⅡ1绪论1 1.1 课题的来源与意义1 1.2 国内外研究现状