Design of capacitive differential pressure sensor based on AD7745

CHEN Bao1; HU Xiao-bing1; SUN Hong2

doi:10.13873/j.1000-97872011.06.046

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Design of capacitive differential pressure sensor based on AD7745

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- Design of capacitive differential pressure sensor based on AD7745
- Vol. 30, Issue 6, Pages: 71-73+76(2011)
- 作者机构：
  
  1. 四川大学制造科学与工程学院
  2. 宜宾机电一体化研究所
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-97872011.06.046
  CLC： TP212.1
- Published：2011
- 稿件说明：
移动端阅览
[1]陈宝,胡晓兵,孙鸿.基于AD7745的电容差压传感器设计[J].传感器与微系统,2011,30(06):71-73+76.

CHEN Bao1, HU Xiao-bing1, SUN Hong2. Design of capacitive differential pressure sensor based on AD7745[J]. 2011, 30(6): 71-73+76.
[1]陈宝,胡晓兵,孙鸿.基于AD7745的电容差压传感器设计[J].传感器与微系统,2011,30(06):71-73+76. DOI： 10.13873/j.1000-97872011.06.046.

CHEN Bao1, HU Xiao-bing1, SUN Hong2. Design of capacitive differential pressure sensor based on AD7745[J]. 2011, 30(6): 71-73+76. DOI： 10.13873/j.1000-97872011.06.046.

摘要

以低功耗微处理器MSP430为核心

采用新型的模数转换芯片AD7745

设计了一种测量液体差压的电容式差压传感器。给出了电容式差压传感器的设计原理和AD7745与MSP430软硬件设计。实验结果表明:该传感器在量程为±100 pF时

测量值稳定在高16位

分辨率为0.0001 pF。电容传感器具有较好的线性输出特性和很好的重复性

成本低

具有较好的应用价值。

Abstract

Based on low power consumption MSP430 microcontroller

using new A/D chip AD7745

designed a capacitive differential pressure sensor is used to measure liquid’ different pressure

The design principle of capacitive differential pressure sensor

AD7745 and MSP430’s software and hardware were presented.The results show the measurement results are stable on the 18 bit

resolution is 0.000 1 pF at range of ±100 pF.The output capacitor has a good linear output characteristics and has good repeatability

and also has low cost.So it was suggested that this system has desirable application value.

关键词

Keywords

references

电容传感器信号调理的新方法 [J]. 谢楠,陈汉良,陈卫民. 自动化仪表 . 2005(03)

用于电容式传感器的差动线性电路 [J]. 王莉田,张玉艳,王玉田. 传感器技术 . 2002(04)

MSP430系列单片机接口技术及系统设计实例[M]. 北京航空航天大学出版社 , 魏小龙编著, 2002

材料力学[M]. 高等教育出版社 , 刘鸿文主编, 1992

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