摘要
介绍了适合混凝土结构局部压应力、压应变状态监测的嵌入式炭纤维水泥石压敏传感器的概念及其传感原理,并研究了环境温度和湿度两个因素对炭纤维水泥石压敏传感器零点输出的影响;同时从传感器电路设计角度探讨了温度、湿度的补偿方法及其在结构中的应用方式。研究表明:炭纤维水泥石压敏传感器的零点输出对环境温度、湿度的变化比较敏感,温度、湿度的最大影响分别约为6%和200%;对炭纤维水泥石压敏传感器采用“测试-补偿”对耦设置构成的补偿电路可以消除因环境温度、湿度以及极化作用产生的噪声信号对传感器零点输出的影响。
The conception and the sensing principle of embedded-style carbon fiber cement paste piezoresistive sensors suitable for local compressive stress and strain monitoring of concrete structures were introduced. The influence of environmental temperature and humidity on the zero-output performance was analyzed. The temperature and humidity compensation methods were discussed based on the circuit design of sensors. The results show that the environmental temperature and humidity have great influences on the zero-output of carbon fiber cement paste piezoresisrive sensors and their effects are about 6 % and 200 %, respectively. A compensation circuit of carbon fiber cement paste piezoresistive sensors is built up by a measurement-compensation dual form to eliminate the influence of noise signals made by temperature, humidity and polarization on zero-output.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2007年第2期99-104,共6页
Acta Materiae Compositae Sinica
基金
国家自然科学基金重点项目(5023804050538020)
国家"863"计划项目(2002AA335010)
关键词
炭纤维水泥石
传感器
温度
湿度
补偿
carbon fiber cement paste
sensors
temperature
humidity
compensation
