摘要
在桥梁结构健康监测的应用中,鉴于监测环境复杂,结构状态信息易受噪声干扰的情况,提出并实现了一套低噪声振动测量系统。系统将低噪声传感芯片M1221融合于基于QF4A512芯片的加速度测量系统。通过QF4A512芯片的多通道模拟输入端口接收M1221芯片的加速度传感值,对多向模拟信号进行滤波、放大、抗混叠、采样等操作后,得到精确的振动加速度值。对系统的标准振动实验验证了系统的精确性,在桥梁监测现场的实验情况表明,该系统运行情况稳定,不易受干扰,适用于桥梁结构健康监测应用。
In the application of bridge structural health monitoring,considering that the monitoring environment is complex and the structure of state information is easily affected by the noise,a vibration measurement system which is low noise has been proposed and implemented.The system combines the M1221 with the acceleration measurement system based on QF4A512.After receiving by QF4A512 through the analog input ports,analog data will take filtration,anti aliasing and Sampling,which we can get the exact value of the vibration.The standard vibration experiment confirms the precision of the system.And the application on bridge shows that the stability of running is excellent.The system can be applied in the application of structural heath monitoring of bridges.
出处
《电子测量技术》
2014年第2期116-119,共4页
Electronic Measurement Technology
基金
2011年度江苏省经济与信息化委员会工业与信息产业转型升级专项引导资金"物联网应用示范工程"
南京市科技计划(201103051)资助项目
关键词
低噪声
振动测量
健康监测
low noise
vibration measurement
structural health monitoring
