Patent ID: 7808397

Claim:
A wireless host as the communication destination for a wireless communication function equipped sensor, said wireless communication function equipped sensor comprising: a sensor unit comprising at least one physical quantity detection device, which detects a physical quantity of a detection object; an electric power generator; an electric power charging device which is charged by electric power generated by said electric power generator; a processing device which processes detection results from said at least one physical quantity detection device; a wireless transmitting device which transmits said detection results to a wireless communication device by wireless signals; a wireless receiving device which receives wireless signals from said wireless communication device; and a wireless signal transmitting/receiving device for transmitting and receiving wireless signals to and from said wireless communication function equipped sensor, and said wireless signal transmitting/receiving device transmits wireless signals to said wireless communication function equipped sensor immediately after receiving wireless signals from said wireless communication function equipped sensor; wherein the sensor unit, processing device, wireless transmitting device and wireless receiving device, are activated intermittently using electric power charged by said electric power charging device, said sensor unit, processing device, wireless transmitting device and receiving device being load devices of the electric power charging device, and wherein said wireless receiving device is activated after the transmitting device is activated, wherein said wireless signal transmitting/receiving device divides data of signals to be sent and transmits said signals when a data quantity of the transmitting signals to be sent to said wireless communication function equipped sensor is larger than a data quantity of wireless signals received from said wireless communication function equipped sensor.