阵列式无线压力传感器系统设计与迟滞补偿研究  

Design of Array-Type Wireless Pressure Sensor System and Research on Hysteresis Compensation

作　　者：张加宏[1,2,3] 刘震宇 李敏[2,3,4] 陈剑翔[3] ZHANG Jiahong;LIU Zhenyu;LI Min;CHEN Jianxiang(Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology,Nanjing University of Information Science and Technology,Nanjing 210044,China;Jiangsu Key Laboratory of Meteorological Observation and Signal Processing,Nanjing University of Information Science and Technology,Nanjing 210044,China;School of Electronic and Information Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China;CMA Research Centre on Meteorological Observation Engineering Technology,Beijing 100081,China)

机构地区：[1]南京信息工程大学,江苏省大气环境与装备技术协同创新中心,南京210044 [2]南京信息工程大学,江苏省气象探测与信息处理重点实验室,南京210044 [3]南京信息工程大学电子与信息工程学院,南京210044 [4]中国气象局气象探测工程技术研究中心,北京100081

出　　处：《电子器件》2018年第2期447-453,共7页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目(61306138);江苏省自然科学基金项目(BK2012460);中国气象局气象探测工程技术研究中心开放课题项目;江苏省气象探测与信息处理重点实验室/江苏省气象传感网技术工程中心联合开放基金课题项目(KDXS1407);江苏高校品牌专业建设工程项目(TAPP)

摘　　要：为提高传统硅压阻式压力传感器的测量精度,针对性地设计与实现了一种带有迟滞误差校正功能的阵列式无线压力传感器系统。该系统采用了硅压阻式传感器阵列和高精度模数转换器AD7794,以STM32微处理器作为数据采集和信号处理的核心部件,并通过无线蓝牙传输模块将测量数据发送至手机接收端,以手机APP显示测量结果有利于用户对压力实现无线监测。针对硅压阻压力传感器的迟滞非线性,基于最小二乘法与函数校正法对压力传感器阵列的输出信号进行了非线性和迟滞误差补偿,结果表明:迟滞误差从原来的±0.152%降为±0.077%,,有效地提高了系统的测量精度。In order to improve the measurement accuracy of traditional silicon piezoresistive pressure sensor,an array-type wireless pressure sensor system with hysteresis error correction is designed and realized.The system uses the silicon piezoresistive sensor array and high-precision analog-to-digital converter AD7794 and takes STM32 microprocessor as the core of data acquisition and signal processing,and adopts the wireless Bluetooth transmission module to send measurement data to the mobile phone.Displaying results with mobile phone APP is beneficial for the user to realize the wireless monitoring of the pressure.In view of the hysteresis nonlinearity of silicon piezoresistive pressure sensor,the nonlinear and hysteresis error of the output signal of the pressure sensor array is compensated by using the least squares method and the function correction method.The results show that the hysteresis error is reducing from±0.152%to±0.077%,which effectively improves the measurement accuracy of the system.

关 键 词：无线压力传感器 阵列式 迟滞补偿 STM32微处理器 应用程序开发 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置] TP274[自动化与计算机技术—控制科学与工程]