Portable rescue device and a method for locating such a device
First Claim
1. A portable rescue device comprising:
- a first communication unit comprising a distress signal transmitter and a distress signal receiver, said receiver including a directional antenna structure comprising multiple antennas arranged so as to provide directional capability;
a compass;
a processor;
a user interface; and
a mode switch for switching between a search mode and a distress signal mode, wherein each distress signal carries a device identification of the transmitting rescue device, and wherein the portable rescue device, in said search mode, is arranged to receive a distress signal from another rescue device, which is in the distress signal mode;
obtain at least two different bearings to said another rescue device, said bearings being taken at different positions;
obtain information about at least one distance between at least two of said different positions;
use said at least two bearings and corresponding at least one distance for calculating a current distance and a current bearing from the portable rescue device to said another rescue device; and
communicate said current distance and current bearing to a user of the rescue device.
1 Assignment
0 Petitions
Accused Products
Abstract
A portable rescue device and a method for locating, by means of a first rescue device set in a search mode, a second rescue device set in a distress mode. In the method, a distress signal carrying a device identification is received from said second rescue device. A first bearing and a second bearing to the second rescue device are obtained. The first and second bearings are taken from a first and a second position, respectively. A distance between these positions is determined. A current distance and a current bearing to the second rescue device are determined on basis of the first and second bearings and the distance. The current bearing and the current distance are communicated to a user of the first rescue device. The portable rescue device is used for performing the method and for that purpose it includes a first communication unit for distress signal transmission and reception; a compass; a processor; a user interface; and a mode switch for switching between a search mode and a distress signal mode. The first communication device has an antenna structure that provides directional capability.
28 Citations
20 Claims
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1. A portable rescue device comprising:
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a first communication unit comprising a distress signal transmitter and a distress signal receiver, said receiver including a directional antenna structure comprising multiple antennas arranged so as to provide directional capability;
a compass;
a processor;
a user interface; and
a mode switch for switching between a search mode and a distress signal mode, wherein each distress signal carries a device identification of the transmitting rescue device, and wherein the portable rescue device, in said search mode, is arranged to receive a distress signal from another rescue device, which is in the distress signal mode;
obtain at least two different bearings to said another rescue device, said bearings being taken at different positions;
obtain information about at least one distance between at least two of said different positions;
use said at least two bearings and corresponding at least one distance for calculating a current distance and a current bearing from the portable rescue device to said another rescue device; and
communicate said current distance and current bearing to a user of the rescue device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for locating, by means of a first rescue device set in a search mode, a second rescue device set in a distress mode, comprising the steps of:
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receiving a distress signal carrying a device identification from said second rescue device;
obtaining a first bearing to said second rescue device, said first bearing taken from a first position;
obtaining a second bearing to said second rescue device, said second bearing taken from a second position;
obtaining a distance between said first and second positions;
determining a current distance and a current bearing to said second rescue device on basis of said first and second bearings and said distance between said first and second positions; and
communicating said current bearing and said current distance to a user of the first rescue device. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification