Patent ID: 6923572

Claim:
A data collection system comprising a readout device and a sensor, wherein said data collection system comprises radiation means for radiating electromagnetic energy, said readout device comprises collection means for collecting data from said sensor, said sensor comprises a sensing circuit including a sensing element, a coil for introducing the electromagnetic energy radiated from said radiation means, a power source section, connected with said coil, for generating internal electric power, a non-volatile memory, a memory control section for controlling data-writing into said non-volatile memory, and a transmitter section for transmitting an output of said sensing circuit and data stored in said non-volatile memory, said memory control section includes determination means for determining the number of times that the data-writing into said non-volatile memory has been made, and said memory control section restricts the number of times of the data-writing into said non-volatile memory to a predetermined number of times and renders said transmitter section operative, on the basis of a result of determination effected by said determination means.