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US 6,554,107 B2Granted
Elevator system
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTakashi Yumura, Hiroshi Araki
Life of this patent
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Abstract
In an elevator system, a first transceiver located at a fixed portion in an elevator shaft and a second transceiver provided at an elevator cage communicate by millimeter waves. The elevator system includes a first portion positioned in an elevator shaft, a second portion positioned in the elevator shaft, vertically moving relative to the first portion, a first transceiver located at the first portion, and a second transceiver located at the second portion.
Claims16
An elevator system comprising:
- a first portion positioned in an elevator shaft;
- a second portion positioned in the elevator shaft, vertically moving relative to said first portion, wherein both of said first and second portions move vertically along the elevator shaft;
- a first millimeter wave transceiver located at said first portion;
- and
- a second millimeter wave transceiver located at said second portion, said first and second transceivers communicating using millimeter waves.
2 more elements
An elevator system comprising:
- a first portion positioned in an elevator shaft;
- a second portion positioned in the elevator shaft, vertically moving relative to said first portion;
- and
- a transceiver located at one of said first and second portions, for transmitting millimeter waves to the other of said first and second portions, and for receiving millimeter waves reflected from the other of said first and second portions, to determine distance between said first and second portions, both of said first and second portions moving vertically along the elevator shaft.
1 more element
An elevator system comprising:
- a first portion positioned in an elevator shaft;
- a second portion positioned in the elevator shaft and vertically moving relative to said first portion;
- a first transceiver located at said first portion;
- and
- a second transceiver provided at said second portion wherein each of said first and second transceivers includes,
- a carrier wave generator for generating a carrier wave,
- a modulator for modulating the carrier wave in accordance with communication data,
- a transmitter for transmitting the carrier wave, modulated by said modulator, towards the other of said first and second transceivers,
- a receiver for receiving the carrier wave transmitted by the other of said first and second transceivers, and
- a demodulator for demodulating the communication data modulated on the carrier wave and received by said receiver;
- and
- one of said first and second transceivers includes a distance calculator for calculating a distance between said first and second portions in accordance with the carrier wave.
9 more elements
An elevator system comprising:
- a first portion positioned in an elevator shaft;
- a second portion positioned in the elevator shaft and vertically moving relative to said first portion;
- a first transceiver located at said first portion;
- and
- a second transceiver provided at said second portion wherein one of said first and second transceivers includes,
- a carrier wave generator for generating a carrier wave, and
- a transmitter for transmitting the carrier wave towards the other of said first and second transceiver;
- the other of said first and second transceivers includes,
- a receiver for receiving the carrier wave transmitted by the one of said first and second transceivers,
- a modulator for modulating the carrier wave in accordance with communication data, and
- a transmitter for transmitting the carrier wave modulated by said modulator towards the other of said first and second transceivers;
- and
- one of said first and second transceivers further includes,
- a receiver for receiving the carrier wave transmitted from the other of said first and second transceivers, and
- a demodulator for demodulating the communication data modulated on the carrier wave received by said receiver, and
- one of said first and second transceivers includes a distance calculator for calculating distance between said first and second portions in accordance with the carrier wave.
13 more elements
An elevator system comprising:
- a fixed portion positioned in an elevator shaft;
- a first movable portion vertically moving in the elevator shaft relative to said fixed portion;
- a second movable portion positioned in the elevator shaft so that said first portion intervenes between said fixed portion and said second portion, said second portion vertically moving relative to said fixed portion and said first movable portion;
- and
- first, second, and third transceivers located at said fixed, first, and second portions, respectively wherein said first and third transceivers communicate with each other through said second transceiver.
2 more elements
Dependencies are inferred from the claim text.