桥梁应变数据采集系统

Bridge strain data acquisition system

本文介绍了桥梁应变数据采集系统的基本组成和工程应用研究现状,从硬件电路和软件程序两方面描述应变数据采集系统的设计方案,主要研究了系统硬件设计部分的关键技术。提出以芯片TP4065和STC12C2052AD为核心的电源管理系统;设计了基于惠斯通电桥的全新桥路接线方法,实现桥梁重要节点处应变量的检测;并针对应变量最大时实际输出电压较小而降低系统测量精度的问题设计了信号调理电路。系统在桥梁上进行了实验,结果表明,本系统能够提高测量精度,且运行稳定,验证了本文所提方法的可行性与正确性。

This paper introduces the basic constitution and the engineering application research status of the bridge strain data acquisition system,from two aspects of hardware circuit and software program to describe the design scheme of the strain data acquisition system,the key technologies of the hardware design of the system is mainly studied.The power management system based on TP4056 and STC12C2052AD is proposed.A new bridge circuit wiring method based on the Wheatstone bridge is designed to detect the strain capacity in significant nodes of the bridge.Aiming at the problem that the system measurement accuracy is reduced when the strain capacity is to maximum but the actual output voltage is very small,signal processing circuit is designed.Experimental tests conducted on bridge show that the proposed system can improve the measurement accuracy and operate steady,verified the correctness and feasibility of the proposed method.