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US 7,731,000 B2Granted
Roll-calling mechanism based vision system for elevator positioning
AssigneeOtis Elevator Company
InventorsJae-Hyuk Oh, Alan M. Finn, Pei-Yuan Peng, Norbert A. M. Hootsmans
Life of this patent
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Abstract
A positioning system having a plurality of transponder modules each located at a known location for receiving an electromagnetic signal and emitting a light signal, at least one transceiver module for emitting an electromagnetic signal and receiving the light signal, and apparatus processing the received light signal to determine a position of the at least one transceiver module.
Claims11
A positioning system comprising:
- a plurality of transponder modules each located at a known location for receiving an electromagnetic signal and emitting a light signal;
- at least one transceiver module for emitting said electromagnetic signal and receiving said light signal;
- and
- means for processing said received light signal to determine a position of said at least one transceiver module.
1 more element
An apparatus for measuring a position of a movable platform comprising:
- a plurality of transponder modules each comprising:
- an RF receiver for receiving an RF signal;
- and
- an array of lights for emitting a light signal;
- at least one transceiver module affixed to said movable platform comprising:
- an RF transmitter for transmitting a coded RF signal;
- a camera for receiving said light signal;
- and
- a processing unit for identifying a position of one of said plurality of transponders from said received light signal and computing a position of said movable platform.
6 more elements
A method for measuring a position of a moveable platform comprising the steps of:
- affixing at least one transceiver module to said moveable platform said transceiver module comprising:
- an RF transmitter for transmitting a coded RF signal;
- a camera for receiving a light signal;
- and
- a processing unit for identifying a position of said received light signal and computing a position of said movable platform;
- disposing a plurality of transponder modules each at a fixed position said transponder modules comprising:
- an RF receiver for receiving a coded RF signal;
- and
- an array of lights for emitting a light signal;
- emitting from said at least one transceiver module a coded RF signal for receipt by one of said plurality of transponder modules;
- receiving said coded RF signal by one of said plurality of said transponder modules and emitting a light signal in response thereto;
- receiving said emitted light signal with said camera device of said at least one transceiver module;
- and
- computing a position of said transceiver module from said received light signal.
11 more elements
Dependencies are inferred from the claim text.