Development of a Universal Wireless Sensor System for Automated Environmental Event Monitoring

This paper presents a wireless sensor system, which consists of an interrogator circuit and a passive L-C resonating sensor tag. The wireless link between the interrogator circuit and sensor tag is established through the inductive coupling between. Any environmental event, which shifts the resonating frequency of the sensor tag will trigger an ´on´ or ´off´ condition reflected at the interrogator circuit. With suitable sensor tags, universal wireless environmental event monitoring can be achieved in an extremely simple and low cost approach.