Ulb location system for rescuing avalanche victims
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Abstract
A method for locating a UWB transmitter, without a previously-set reference, using at least one first set of at least three UWB searching transceivers, including first, second, and third transceivers. The method a) synchronizes the three UWB searching transceivers, arranged at three different points, and estimates the relative position of these three points; b) receives, by the three transceivers, signals transmitted by the transmitter to be located; and c) calculates the relative position, with respect to the three searching transceivers, of the transmitter to be located according to the time of travel of the signals, transmitted by the transmitter to be located, to the three searching transceivers.
44 Citations
79 Claims
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1-44. -44. (canceled)
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45. A method for locating a UWB transmitter, without a previously-set reference, using at least one first set of at least three UWB searching transceivers, said method comprising:
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A) synchronizing the UWB searching transceivers, arranged at different points, and estimating relative distance between the points;
B) receiving, by the transceivers, signals transmitted by the transmitter to be located;
C) calculating, by the transceivers, respectively, n durations between arrival time of signals transmitted by the transmitter to be located, and a common reference time;
D) then, transmitting, to one of the transceivers, the durations calculated, relating to the signals transmitted by the transmitter to be located and received by the other transceivers;
E) calculating the relative position, with respect to the searching transceivers, of the transmitter to be located according to the time of travel of the signals, transmitted by the transceiver to be located, to the searching transceivers. - View Dependent Claims (46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 78)
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75. A device for locating a UWB transceiver, comprising:
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at least three searching transceivers, each comprising UWB signal transceiver means;
the searching transceivers are attached in the resting position and configured to be detached during a location operation of a UWB transceiver;
means for synchronizing the searching transceivers in the attached state;
means for calculating, without a previously-set reference point, a position of a transmitter to be located according to times of travel of signals, transmitted by the transmitter to be located, to the searching transceivers; and
display means for indicating at least the position of the transmitter to be located with respect to that of the searching transceivers. - View Dependent Claims (76, 77, 79)
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Specification