| 摘要 |
An elevator system ( 20 ) includes wireless communicating portions ( 40, 42 ) that communicate with each other to provide elevator cab ( 22 ) position information within a hoistway ( 24 ). In one example, a first communicating portion ( 40 ) is supported on the elevator cab ( 22 ) that generates a radio frequency trigger signal ( 58 ) that is received by a second communicating portion ( 42 ) at a selected position along the hoistway ( 24 ). The second communicating portion ( 42 ) responsively generates an ultrasound signal ( 64 ) that is received by the first communicating portion ( 40 ). A characteristic of the received locating signal, such as the timing between the trigger signal and the receipt of the locating signal, provides position information regarding the cab within the hoistway.
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