LOCATION SYSTEM, FOR ASSET OR PERSONNEL TRACKING
First Claim
1. A location system, for the tracking of personnel or products for establishing the location of an identification tag attached to a person or product, wherein the tag comprises(i) a power source;
- (ii) an ultrasonic transducer;
(iii) a transmitter connected to an output signal from said transducer and capable of transmitting multiple frequencies to establish the unique ID of said tag in question, including a first frequency solely to identify when said tag is about to start transmitting data;
(iv) a plurality of strategically located ultrasonic receivers; and
(v) processing means including a reader incorporating a number of Goertzel filters corresponding to the number of frequencies transmitted to process output signals from said ultrasonic receivers to establish the ID of said read tag and its location.
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0 Petitions
Accused Products
Abstract
A location system, for the tracking of personnel or products for establishing the location of an identification tag attached to a person or product, has the tag comprising a power source; an ultrasonic transducer; a transmitter connected to an output signal from the transducer and capable of transmitting multiple frequencies to establish the unique ID of the tag in question, including a first frequency solely to identify when a tag is about to start transmitting data; the system comprising further a plurality of strategically located ultrasonic receiver; and processing means including a reader incorporating a number of Goertzel filters corresponding to the number of frequencies transmitted to process output signals from the ultrasonic receivers to establish the ID of the read tag and its location.
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Citations
11 Claims
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1. A location system, for the tracking of personnel or products for establishing the location of an identification tag attached to a person or product, wherein the tag comprises
(i) a power source; -
(ii) an ultrasonic transducer; (iii) a transmitter connected to an output signal from said transducer and capable of transmitting multiple frequencies to establish the unique ID of said tag in question, including a first frequency solely to identify when said tag is about to start transmitting data; (iv) a plurality of strategically located ultrasonic receivers; and (v) processing means including a reader incorporating a number of Goertzel filters corresponding to the number of frequencies transmitted to process output signals from said ultrasonic receivers to establish the ID of said read tag and its location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification