一种基于串联回路的应变与裂纹综合监测方法  

Strain-crack monitoring method based on the series current loop

作　　者：张移山[1] 蔡佳昆[1] 王昊[1] 

机构地区：[1]北京航空工程技术研究中心,北京100076

出　　处：《电子测量技术》2014年第8期129-131,135,共4页Electronic Measurement Technology

摘　　要：针对飞机结构健康监测的需求,提出了一种基于串联回路用电阻应变计和ICMS传感器对应变与裂纹同时进行监测的方法。电阻应变计、ICMS传感器、参考电阻和恒流源构成一个电流回路,通过测量传感器上的压降来获取传感器信号的变化,参考电阻用于消除电流波动对测量精度的影响。提出了采用两级放大原理的信号调理方法,该方法能自动根据传感器的类型调整电路放大倍数。试验研究结果表明,监测方法能够同时兼容电阻应变计和ICMS传感器,测量精度达到使用要求。In order to meet the requirement of the aircraft structure health monitoring, this paper describes a monitoring method for the strain and crack based on the series current loop using strain gauges and ICMS sensors. Strain gauges, ICMS sensors, a reference resistor and a constant current source are series-connected, the resistance change of each sensor can be detected through voltage drop. The reference resistor can lessen the influence of the current fluctuation on the measurement. A signal conditioning method adopting two stage amplifying is proposed, the method can adjust the circuit gain automatically according to the sensor type. The experiment research results show that the monitoring method is practical and effective for the two types of the sensors.

关 键 词：结构健康监测 电阻应变计 ICMS传感器 串联回路 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]