电感式接近开与单片机技术相结合的一种非接触式的转速测量装置 .doc

.摘 要 转速表是机械行业必备的仪器之一，用来测定电机的转速。常用于电机、电扇、造纸、塑料、化纤、洗衣机、汽车、飞机、轮船等制造业传感器信号Abstract tachometer is the necessary instruments of Machinery?Industry，it’s used to measure the speed of the motor。it’s also used widely in the industry of electrical machine、electric fan、papermaking、plastics、chemical fiber、washing machine、automobile、aircraft、steamship and so on。 The study is based on the traditional tachometer, it’s also use the detector and the Inductive Proximity Switches which with single-chip technology that combines a non-contact speed measurement device of the instrument. Tachometer can show the speed of the wheel directly, reflects the state of the engine’s working. It also can help driver to adjust the driving gear timely and effective to ensure that the engine can work in the right state of running in order to reduce the attrition and save fuel. The finally purpose is to access to a good driving performance. This study can generally be divided into two parts—hardware and software. The hardware consists of the Inductive Proximity Switches, AT89S52 MCU and LED display. The software processes data and displays the programming. The process of the entire system is run by the inductive sensor signal which is changed from the pulse by the shaping filter circuit limiter, the single-chip pulse cycle is get by measuring the pulse frequency, And get the speed of the engine, at last, the data is sent to the LED display.The rotation radius is set by button. In accordance with tachometer status of research and development, this design of the inductive tachometer adapts to a high precision measurement and control of occasions, it also has a high practical value and should be spread widely. Key word:Inductive sensors; Display instruments; single-chip；Date collection 、processing and collection摘 要 I Abstract II 目 录 III 1 引言 1 1.1 课题背景 1 1.2 转速表的发展与应用 1 1.2.1 国外发展状况 1 1.2.2 国内发展状况 2 1.2.3 课题意义 2 2 课题内容及研究方案 3 2.1 课题主要内容 3 2.2 课题总体设计方案 3 2.2.1 硬件部分 3 2.2.2 软件部分 4 3 转速测量仪的硬件电路