DT-Series压电传感器调理电路设计

摘要针对 DT 系列压电式传感器，设计了信号调理电路，详细介绍了前置放大电路、低通滤波电路和迟滞整形电路的设计原理。分别选取了 LMC6482 和 CA3140 运算放大器设计了前置放大电路和滤波电路。利用 Multisim 软件对所设计的调理电路进行了仿真，仿真的结果表明：设计的信号调理电路工作稳定、重复性好、波形良好。电路对信号的调理达到了实时性和准确性的要求，较好地还原了真实的现场振动信号，满足了对微弱信号的基本调理要求，可用于基本的现场信号检测。68532

毕业论文关键词 DT-Series 压电传感器调理电路 Multisim

Title Design of a signal conditioner circuit for the piezoelectric transducer

Abstract

The design of a signal conditioner circuit for the piezoelectric transducer is described detailedly in this paper, including the design principle of preamplifier circuit,low-pass filter and hysteresis shaping circuit. The corresponding simulations and experiments show that the circuit has the function of real time processing; it is reliable and can meet the conditioning needs of weak signal, with the characteristic of small signal distortion.

Keywords Piezoelectric Transducer; Signal Conditioner; Multisim;

1 绪论 5

1．1 课题研究的背景及意义 5

1．2 压电传感器的特点及发展 6

1．3 PVDF 压电薄膜传感器的研究现状 6

1．4 课题研究的主要内容 7

2 PVDF 压电薄膜传感器理论基础 8

2．1 压电式传感器 8

2.1.1 压电效应 8

2.1.2 压电式传感器的等效电路 9

2．2 PVDF 压电薄膜传感器 10

2.2.1 PVDF 压电薄膜传感器简介 10

2.2.2 PVDF 压电薄膜传感器应变传感机理 11

2.2.3 PVDF 压电薄膜特性的分析 13

2．3 压电传感器应用场景建模 14

3 DT-Series 系列传感器 16

3．1 DT-Series 系列传感器介绍 16

3．2 DT-Series 等效电路 17

3．3 DT-Series 输出信号分析 18

4 压电式传感器实验方案 DT-Series压电传感器调理电路设计:http://www.youerw.com/zidonghua/lunwen_77100.html