51单片机的压电传感器设计+仿真电路图

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摘要：本项目是由压电传感器测量震动，再由放大电路放大传感器产生的电荷，再由单片机控制进行A/D转换，并最后显示出测量数据。信息的收集与各种各样的处理已成为信息技术领域的核心，在社会进步和科技创新中有着重要地位。传感器作为信息采集与处理的重要组成部分，是一项不可或缺的新技术，也是现代科学技术飞速发展的主要力量。压电加速度传感器在振动信号的采集和振动信号的采集中有很大的应用。具有抗干扰能力强、体积小、重量轻、安装方便等优点。因此，压电加速度传感器的信号采集与分析是信息技术研究的重要课题。49727

本论文的主要创新点：

1、我在这次的设计中用了压电式的传感器。压电传感器是基于压电效应的传感器。它由压电材料制成的敏感元件组合而成。压电材料受到外力作用后产生的电荷。在经过电荷放大器和测量电路放大再经过变换阻抗后就可以获得正比于所受外力的电量输出。压电式传感器在测量力和能变换为力的非电物理量有着自己的优点。它的优点是重量轻、灵敏度高、频带宽、结构简单、信噪比高、工作可靠等。

2、在A/D转换方面我用了XPT2046芯片XPT2046支持从1.5V到5.25V的低电压I/O接口。工作温度范围为-40℃～+85℃。其有着高速率和低功耗的特点，被广泛的运用于小型的设备上。

3、在系统的控制方面我选择的是51单片机，51单片机就是我们所说的运用Intel8031系统的单片机。现在虚伪广泛的8为单片机是ATMEI公司的AT89系列。51单片机是基础入门的更是应用最广泛的一种单片机。

关键词：压电效应；单片机；压电传感器；电荷放大电路；A/D转换

Design Of Piezoelectric Sensor On Single Chip Microcomputer

Abstract:this project is to measure the vibration by the piezoelectric sensor, and then amplified by the amplifier circuit to produce the charge, and then by the microcontroller to control the A/D conversion, and finally show the measurement data.

Information collection and processing have become the core of the information technology, and it plays an important role in the social progress and scientific and technological innovation. Sensors as an important part of information collection and processing, is an indispensable new technology, but also the main force of the rapid development of modern science and technology. Piezoelectric acceleration sensor is a traditional and popular piezoelectric sensor, which has a great application in the acquisition of vibration signal and the acquisition of vibration signal. Has the advantages of strong anti-interference ability, small size, light weight, convenient installation and so on. Therefore, the signal acquisition and analysis of piezoelectric accelerometer is an important issue in information technology research.

The main innovation of this paper:

1, I used the piezoelectric sensor in this design. Piezoelectric sensor is a sensor based on piezoelectric effect. It is made of a sensitive element made of piezoelectric material. When the piezoelectric material is subjected to an external force, the charge will be generated. Charge in the charge amplifier and the measurement circuit amplification and then after the transform impedance can be obtained directly proportional to the power output by the external force. The piezoelectric sensor in measuring force and non electric physical quantity transform force has its own advantages. It has the advantages of light weight, high sensitivity, wide frequency band, simple structure, high signal-to-noise ratio, reliable work and so on.

2, in terms of A/D conversion, I used the XPT2046 chip XPT2046 to support the low voltage I/O interface from 1.5V to 5.25V. Operating temperature range of -40 degrees C ~ +85. With its characteristics of high speed and low power consumption, it is widely used in small devices.