Design of wireless data acquisition system for capacitive force sensor

PU Minghui; FENG Haobin; LÜ Changhao; TIAN Longxiang

Chinese

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Design of wireless data acquisition system for capacitive force sensor

Design & Manufacture | 更新时间：2026-03-01

- Design of wireless data acquisition system for capacitive force sensor
- Vol. 45, Issue 2, Pages: 80-84(2026)
- 作者机构：
  
  广西大学机械工程学院,广西,南宁,530004
- 作者简介：
- 基金信息：
- DOI：
  CLC： TP212;TP274
- Published：2026
- 稿件说明：
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PU Minghui, FENG Haobin, LÜ Changhao, et al. Design of wireless data acquisition system for capacitive force sensor[J]. 2026, 45(2): 80-84.
DOI：

PU Minghui, FENG Haobin, LÜ Changhao, et al. Design of wireless data acquisition system for capacitive force sensor[J]. 2026, 45(2): 80-84. DOI：

摘要

针对电容式力传感器在有线传输中的缺点，设计了一种使用WiFi传输方式的无线数据采集系统。系统下位机部分使用ESP8684实现模块控制和无线数据传输功能；使用AD7147芯片采集电容信号；使用TPS63802芯片为主要功能模块提供稳定工作电压。上位机使用C#语言进行设计，与下位机的应用层通信协议为Modbus TCP。实验结果表明，所设计的无线数据采集系统能够稳定进行10m左右的短距离无线数据传输，且具备良好的续航能力；标定所得的曲线线性度高，且Ⅰ类误差为0.20%，表明系统能正确得到极板电容器电容值随力的变化关系和电容器的电容变化量，为电容式力传感器提供了有效的无线传输参考方案。

Abstract

Aiming at the shortcomings of capacitive force sensors in wired transmission

a wireless data acquisition system using WiFi transmission mode is designed.For the lower computer of the system

the ESP8684 is used to realize module control and wireless data transmission functions

and the AD7147 chip is adopted for capacitance signal acquisition

and the TPS63802 chip is used to provide a stable operating voltage for main functional modules.The upper computer is designed using C# language

and the application layer communication protocol with the lower computer is Modbus TCP.Experimental results demonstrate that the designed wireless data acquisition system can stably perform short-distance wireless data transmission within approximately 10m and exhibits good endurance capability.The calibration curve shows high linearity with a Type I error of 0.20%

indicating that the system can accurately obtain the relationship between the capacitance value of the plate capacitor and the applied force

as well as the capacitance variation of the capacitor.This system provides an effective wireless transmission reference solution for capacitive force sensors.

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