Tracking device
First Claim
1. A tracking system comprising, in combination:
- a target unit having a GPS receiver, a signal transmitter to send a signal including a position of the target unit, and a processor to calculate an optimal time interval for transmission of the signal; and
a locating unit having a GPS signal receiver, a compass to provide a reference direction of the locating unit, a signal receiver to receive the signal sent by the transmitter of the target unit, a processor to calculate a range and bearing from the locating unit to the target unit, and an indicator to display the range and bearing.
1 Assignment
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Accused Products
Abstract
A tracking system includes a target unit having a GPS receiver, a signal transmitter to send a signal including a position of the target unit; and a processor to calculate an optimal time interval for transmission of the signal. A locating unit has a GPS signal receiver, a compass to provide a reference direction of the locating unit, a signal receiver to receive the signal sent by the transmitter of the target unit, a processor to calculate a range and bearing from the locating unit to the target unit, and an indicator to display the range and bearing. In certain preferred embodiments, the processor calculates a confidence level indicating the reliability of the signal being sent.
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Citations
82 Claims
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1. A tracking system comprising, in combination:
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a target unit having a GPS receiver, a signal transmitter to send a signal including a position of the target unit, and a processor to calculate an optimal time interval for transmission of the signal; and
a locating unit having a GPS signal receiver, a compass to provide a reference direction of the locating unit, a signal receiver to receive the signal sent by the transmitter of the target unit, a processor to calculate a range and bearing from the locating unit to the target unit, and an indicator to display the range and bearing. - 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 tracking system comprising, in combination:
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a target unit having a GPS receiver, and a signal transmitter to send a signal including a position of the target unit; and
a locating unit having a GPS signal receiver, a compass to provide a reference direction of the locating unit, a signal receiver to receive the signal sent by the transmitter of the target unit, a processor to calculate a range and bearing from the locating unit to the target unit and a confidence level attributed to the signal sent by the target unit, and an indicator to display the range, bearing and confidence level. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A system to transmit the location of an object or individual associated with the system comprising, in combination:
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a GPS receiver to determine a position of a device;
a signal transmitter to send a signal including the position of the device; and
a processor to calculate an optimal time interval for transmission of the signal. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 61)
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50. A tracking system to track the location of an object in water comprising, in combination:
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a target unit having a GPS receiver to determine a position of the target unit, a sensor to detect motion of the target unit, a processor to calculate when the target unit is proximate a crest of a wave, a signal transmitter to send a signal including the position of the target unit when the target unit is proximate a crest of a wave; and
a locating unit having a GPS signal receiver, a compass to provide a reference direction of the locating unit, a signal receiver to receive the signal sent by the transmitter of the target unit, a processor to calculate a range and bearing from the locating unit to the target unit, and an indicator to display the range and bearing. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58, 59, 60)
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62. A method of tracking a target unit from a locating unit comprising the steps of:
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receiving a GPS signal at a target unit to determine a location of the target unit;
receiving a GPS signal at a locating unit tracking the target unit to determine a location of the locating unit;
calculating an optimal time interval for transmission of a signal from the target unit to the locating unit, the signal including the GPS location of the target unit;
transmitting the signal from the target unit to the locating unit during the optimal time interval;
calculating a range and bearing from the locating unit to the target unit. - View Dependent Claims (63, 64, 65, 66, 67)
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68. A tracking system comprising, in combination:
a tracking unit having a GPS receiver, a signal transmitter to send a signal including a position of the tracking unit, a signal receiver configured to receive a signal sent by a transmitter of at least another tracking unit, a processor configured to calculate a range and bearing from the tracking unit to at least another tracking unit and a confidence level attributed to a signal sent by at least another tracking unit, a compass to provide a reference direction of the tracking unit, and an indicator configured to display the range and bearing to at least another tracking unit. - View Dependent Claims (69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82)
Specification