| 摘要 |
<p>The present invention discloses an electronic tag comprising electronic circuitry incorporating a microprocessor (44), a non-volatile memory associated with the microprocessor (44) such that the microprocessor (44) can write data to the non-volatile memory, a sensing transducer (54) connected to the microprocessor (44), and an interface (30) for interrogation of the non-volatile memory, the sensing transducer (54) being such as to output an electrical signal in response to an event of a pre-selected type, the microprocessor (44) being programmed to log signals from the sensing transducer (54) to the non-volatile memory to produce a record of the selected event and being arranged to be powered by the electrical output signal from the sensing transducer (54). <IMAGE></p> |
