电子式微位移测量仪的设计.docVIP

编号 论文 题目： 物联网工程 学院专业 学 号 学生姓名 指导教师 江 南 讲师 二〇一二年月 摘 要 考虑到电感交流电桥负载的影响，结合运算放大器的信号放大功能与三极管高负载能力，设计了负载能力高的正弦激励信号来驱动交流电桥。 其次，在分析了基于交流电桥的电感传感器输出信号实质的基础上，针对目前相敏检波电路的不足，采用有源全绝对值电路检波的方法。在分析了现有绝对值电路的基础上，提出了一种基于单运放的绝对值电路设计方法，详细论述了其原理、优点及设计参数等，并把它应用在相敏检波上关键词：相敏检波；正弦波发生器；零点残余电压 ABSTRACT Often encountered in engineering survey requirements of high-precisionmeasurement of displacement Occasion increasingly high degree of automation. Toensure product quality, product testing and quality management have put forwardhigher requirements. This paper introduces an inductance micro-displacementmeasuring instrument design and implementation of the instrument microcontroller,using the inductive displacement sensor and LCD display of Chinese characters,such as micro-displacement automatic measurement, display, print andcommunication. Inductance micrometer is a very high resolution, reliable operation and long service life meter, inductance micrometer used in the micro displacement measurement hasa long history of production abroad is more mature, high precision performancestable, but very expensive. domestic product of inductance micrometer drift workingreliability is not high, and high-precision range and small, has been to maintain a certain gap between the level of foreign sensors and the rapid development of ultra-precision machining technology today, the measurement accuracy becomes lesssuited to the demand for the development of processing technology. In this paper, to address these issues, the inductance of the sensor measuring circuit design andimprovements. sine wave generating circuit inductance micrometer, AC amplifiercircuit, band pass filter circuit, phase sensitive detection circuit such as the analysis and design. Taking into account the load inductor AC bridge, the combination of theop amp signal amplification function and transistor high load capacity, the designload capacity of t