REAL-TIME METHOD AND SYSTEM FOR LOCATING A MOBILE OBJECT OR PERSON IN A TRACKING ENVIRONMENT
First Claim
1. A real-time method of locating a mobile object or person in a tracking environment in which a plurality of sensors are located, the method comprising:
- (a) providing a tracking tag wearable by the person or attachable to the object;
(b) modulating a first carrier signal with a first packet including a first set of data to obtain a modulated first signal;
(c) transmitting from the tag to a sensor nearest the tag the first signal, the first signal containing the first packet and having a first precision and a first range within the environment;
(d) repeating steps (b) and (c) until a modulated second signal is received at the tag from the nearest sensor within a time period after step (c), the second signal containing a second packet including a second set of data and having a second precision and a second range within the environment;
(e) receiving the second signal at the tag within the time period;
(f) demodulating the second signal to obtain the second packet; and
(g) determining location of the tag within the environment based on the second packet of the received demodulated second signal.
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Accused Products
Abstract
A real-time method and system for locating a mobile object or person in a tracking environment in which a plurality of sensors are located are provided. The method includes providing a tracking tag wearable by the person or attachable to the object. The method further includes modulating a first carrier signal with a first packet including a first set of data to obtain a modulated first signal. The method still further includes transmitting from the tag to a sensor nearest the tag the first signal, the first signal containing the first packet and having a first precision and a first range within the environment. The method further includes repeating the steps of modulating and transmitting until a modulated second signal is received at the tag from the nearest sensor within a time period after the step of transmitting. The second signal contains a second packet including a second set of data and has a second precision and a second range within the environment. The method still further includes receiving the second signal at the tag within the time period. The method further includes demodulating the second signal to obtain the second packet. The method still further includes determining location of the tag within the environment based on the second packet of the received demodulated second signal.
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Citations
40 Claims
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1. A real-time method of locating a mobile object or person in a tracking environment in which a plurality of sensors are located, the method comprising:
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(a) providing a tracking tag wearable by the person or attachable to the object; (b) modulating a first carrier signal with a first packet including a first set of data to obtain a modulated first signal; (c) transmitting from the tag to a sensor nearest the tag the first signal, the first signal containing the first packet and having a first precision and a first range within the environment; (d) repeating steps (b) and (c) until a modulated second signal is received at the tag from the nearest sensor within a time period after step (c), the second signal containing a second packet including a second set of data and having a second precision and a second range within the environment; (e) receiving the second signal at the tag within the time period; (f) demodulating the second signal to obtain the second packet; and (g) determining location of the tag within the environment based on the second packet of the received demodulated second signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A real-time system of locating a mobile object or person in a tracking environment, the system comprising:
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a plurality of sensors located in the tracking environment; and a tracking tag wearable by the person or attachable to the object, the tag being programmed to at least partially perform the steps of; (a) modulating a first carrier signal with a first packet including a first set of data to obtain a modulated first signal; (b) transmitting to a sensor nearest the tag the first signal, the first signal containing the first packet and having a first precision and a first range within the environment; (c) repeating steps (a) and (b) until a modulated second signal is received from the nearest sensor within a time period after step (b), the second signal containing a second packet including a second set of data and having a second precision and a second range within the environment; (d) receiving the second signal within the time period; (e) demodulating the second signal to obtain the second packet; and (f) determining location of the tag within the environment based on the second packet of the received demodulated second signal. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification