一种多功能腐蚀监测无线传感器设计与实现

摘要

提出一种基于射频识别(RFID)的多功能无线腐蚀监测传感器,应用于混凝土的腐蚀情况监测.该传感器由RFID调制解调器、低功率单片机以及低功率三电极恒电位仪组成,由外部RFID读写器供电,且能够进行多种参数测量,包括线性极化、开路电压、温度以及电源电压.该传感器封装在一个尺寸为10.5 cm×4.5 cm×6.2 cm的机箱内.经过混凝土电化学腐蚀电池测试,结果显示提出传感器的性能和精度能够与台式恒电位仪(成本较高且体积较大)相媲美,但体积更小.进行线性极化测量时,提出传感器的实测功率损耗为668 μW.%Based on the radio frequency identification(RFID),a multi-function wireless corrosion monitoring sensor is proposed,which is suitable for the corrosion monitoring of concrete.The sensor consists of RFID modem,low power microcontroller and low power three electrode potentiostat,it is mainly composed of an external RFID reading and writing device to supply power,and can be used to measure multiple parameters,including linear polarization,open circuit voltage,temperature and supply voltage.The sensor is packaged in a case with a size of 10.5 cm×4.5 cm×6.2 cm.The test results show that the performance and precision of the sensor can be comparable to that of the desktop constant potential meter(high cost and large volume).When the linear polarization measurement is carried out,the measured power loss of the sensor is 668 μW.