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 Title: |
US5150310:
Method and apparatus for position detection
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Greenspun, Philip G.; Melrose, MA
Baecher, Gregory B.; Wayland, MA
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| Assignee: |
Consolve, Inc., Lexington, MA
other patents from CONSOLVE, INC. (686135) (approx. 1)
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| Published / Filed: |
1992-09-22
/ 1989-08-30
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| Application Number: |
US1989000400354
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| IPC Code: |
Advanced:
G01S 5/06;
Core:
more...
IPC-7:
G01S 3/02;
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| U.S. Class: |
Current:
342/451;
701/219;
701/300;
Original:
364/516;
364/460;
364/452;
342/451;
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| Field of Search: |
364/516,559,569,451,443,460,461,450
342/047,147,118,451
340/977,979
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| Priority Number: |
| 1989-08-30 |
US1989000400354 |
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| Abstract: |
Position detection methods and apparatus include transmitters, coupled to each object to be tracked, for transmitting signals uniquely identifying each transmitter. Receivers disposed at known locations receive the transmitted signals and generate received signals representative of the transmitted signals. Arrival-time elements, responsive to a selected zero-crossing or other event in each received signal, determine the respective arrival time of each transmitted signal at each receiver. A processor calculates differences in arrival times of the transmitted signals at each receiver, and determines the spatial position of each object with respect to the known locations of the receivers.
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| Attorney, Agent or Firm: |
Lahive & Cockfield ;
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| Primary / Asst. Examiners: |
Black, Thomas G.; Ramirez, Ellis B.
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| Maintenance Status: |
E1 Expired Check current status
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 33 claims |
Having described the invention, what is claimed as new and secured by Letters Patent is:
1. A system for determining, in real-time, the spatial position of at least one object, the system comprising
- transmitting means including at least one transmitter coupled to said at least one object for transmitting a modulated electromagnetic radiation signal, said transmitted signal being modulated with a data bitstream including transmitter identification data and having a time-variant waveform including a selected feature,
- receiving means, including a plurality of receivers disposed at selected known locations, for receiving said transmitted signal and for generating an electrical receive signal representative of said transmitted signal,
- demodulation means, coupled to said receiving means, for demodulating said electrical receive signal to generate a demodulated electrical signal, and
- processing means, coupled to said demodulation means, for identifying said at least one transmitter and calculating, in response to said demodulated electrical signal, the spatial position of said at least one object with respect to said selected known positions of said receivers, said processing means including
- arrival-time means for processing said demodulated electrical signal to generate arrival-time signals, said arrival-time signals being representative of respective arrival times at which said electromagnetic radiation is received at respective receivers,
- said arrival-time means including means for generating arrival time signals in response to the selected feature in said time-variant waveform, and
- calculation means, for processing said arrival-time signals associated with said at least one object and corresponding to respective receivers, to calculate the spatial position of said at least one object with respect to said selected positions of said receivers.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 49 U.S. patent(s) that reference this one
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| U.S. References: |
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| Forward references (49)
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Backward references (44)
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Citation Link
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