| 摘要 |
An electronic lock and key system including a lock unit (4) and a key unit (2), wherein at least a first one of the lock unit and the key unit includes at least first and second transmitters (10, 12) capable of respectively transmitting in first and second transmission media, and wherein at least a second one of the lock unit and the key unit includes a first receiver (26) capable of receiving signals transmitted by the first transmitter (10) and a second receiver (28) capable of receiving signals transmitted by the second transmitter (12), and wherein the key unit (2) comprises a microprocessor (6) and at least one transmitter (10, 12) and the lock unit comprises a microprocessor and at least one receiver (26, 28).
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