摘要：本课题压电传感器设计使用了转换与检查技术、信号的处理、数字技术等技术。是一款现代的新型测量仪器。例如压电传感器主要是单片机的微型计算机,由所述压电传感器检测信号,通过放大器模块放大，然后把放大得到的模拟信号导入到A/D转换器中,输出得到数字信号,经过单片机对信号的处理，再通过显示电路得出结果,最后得到我们需要的数据。压电传感器在测量方面非常精确、快速测量、并且使用数字液晶显示。具有很好的实用性,小到可以测量人的心率脉搏,大到可以测量汽车的震动频率。本次设计的目的主要是实现测量人的脉搏心跳。82519

 在这一设计中,包含了软件设计和硬件设计,其中软件主要是KEIL软件编程;硬件设计则包括电路板的焊接，原理图和仿真。本次试验设计中,传感器用薄膜式压电传感器,配上STC12C5A60S2芯片,用于处理所收集的数据,放大电路则用LF356N高阻型运算放大器,A/D转换电路由于我们选择的STC12C5A60S2芯片内部自带，所以我们不需要另外选择,由上述压电薄膜传感器中产生的电荷后,经过LF356N放大后,将放大后得到的模拟信号，导入到AD转换中,经过单片机的处理，最后输入到LCD显示中显示出来,最后得到实验数据。

毕业论文关键词：压电薄膜传感器；LCD显示；STC12C5A60S2；A/D转换；LF356N

Design of Piezoelectric Sensors Based on Single Chip Microcomputer

Abstract:This topic piezoelectric sensor design uses the conversion and inspection technology, signal processing, digital technology and other technologies。 Is a modern new measuring instrument。 For example, the piezoelectric sensor is mainly a microcomputer of a single-chip microcomputer, and the signal is detected by the piezoelectric sensor, amplified by an amplifier module, and then the amplified analog signal is introduced into an A /D converter to output a digital signal, Of the processing, and then through the display circuit to the results, and finally we need the data。 Piezoelectric sensors are very accurate and fast to measure, and use digital LCD displays。 Has a very good practicality, small enough to measure the pulse of human heart rate, large enough to measure the vibration frequency of the car。 The purpose of this design is to achieve the measurement of human pulse heartbeat。

  In this design, including software design and hardware design, which is mainly software KEIL software programming; hardware design, including circuit board welding, schematics and simulation。 In this test design, the sensor with a thin film-type piezoelectric sensor, coupled with STC12C5A60S2 chip, used to process the collected data, the amplifier circuit is LF356N high-impedance operational amplifier, A/D conversion circuit because we chose STC12C5A60S2 chip internal So that we do not need to choose another, by the piezoelectric film sensor generated in the charge, after LF356N amplification, the amplified analog signal, into the AD conversion, after the single-chip processing, and finally input to the LCD Show the show, and finally get the experimental data。

Keywords:Piezoelectric film sensor；LCD display；STC12C5A60S2；A /D conversion

；LF356N 

目录

摘要 i

Abstract ii

1绪论 1

1。1 本课题研究意义 1

1。2 本课题的发展现状和发展前景 2

1。2。1  压电传感器 2

1。2。2  单片机 4

1。3 本课题主要内容 5

2系统总体方案的选择与设计