DETECTING SYSTEM, AND READER

A detecting system is provided with a sensor (10) including an antenna portion (11) formed by means of a metal pattern, and a rear surface reflective material (13) disposed facing the antenna portion (11) with an isolation layer (12) interposed therebetween; and a reader (20) which transmits electromagnetic waves (Fa) toward the sensor (10) and receives reflected waves (Fr) therefrom, and which detects a change of state in the sensor (10) by comparing a reflection characteristic of the sensor (10) ascertained from the reflected waves (Fr) with a pre-stored reflection characteristic of the sensor (10). 一种检测系统，具备：传感器(10)，具有由金属图案形成的天线部(11)，以及与该天线部(11)相对置地隔着绝缘层(12)配设的背面反射材(13)；以及读取器(20)，通过向传感器(10)发送电磁波(Fa)并且接收其反射波(Fr)，并对根据该反射波(Fr)而把握的传感器(10)的反射特性与事先存储了的传感器(10)的反射特性进行比较，从而对传感器(10)的状态变化进行检测。