摘要
设计了一种高精度压力变送器,基于电阻式应变片构建的惠斯通电桥测量电路,采用程控放大电路进行量程自动可调的倍数差分放大,加之数字滤波技术,运用单片机自带的AD转换电路进行模数转换,通过蓝牙模块与由C++Builder 6.0编写的上位机软件进行通信,实现远距离实时监测。实验证明,该压力变送器具有安全性高、稳定性强、准确性高等优点,在工程应用中表现良好。
This paper designs a high precision pressure transmitter based on the Wheatstone bridge measurement circuit by resistance stain type sensor. The programmable amplifier circuit is used to magnify signal with the function of automatically adjustable range. Technology of digital filter is used too. The design utilizes single-chip microcomputer and its own AD conversion circuit. By bluetooth module and PC software written by C++ Builder 6.0 , this design can realize remote real-time monitor. Experiments show that the pressure transmitter has high safety, strong stability, high accuracy and so on. It gives a good performance in engineering applications.
出处
《电子技术应用》
北大核心
2014年第1期68-71,共4页
Application of Electronic Technique
作者简介
王改云,女,1964年生,教授,硕士研究生导师,主要研究方向:智能控制、数据融合、故障诊断等。
胡志强,男,1988年生,硕士研究生,主要研究方向:智能控制与检测。
周爱霞,女,1975年生,讲师,主要研究方向:计算机应用、数控技术。