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US 11,150,323 B2Granted
Method for geographically locating a signal-emitting device
AssigneeKerlink
InventorYannick Delibie
Life of this patent
Estimating the term…
Abstract
A method for geolocating a signal-transmitting device, the geolocation method including: supplying first data of reception by a plurality of first reception stations of a first radio signal transmitted at a first frequency, calculating a first geographic position of the signal-transmitting device, detecting that the geographic position of the signal-transmitting device is included in a predefined second geographic zone, transmitting a signal instructing transmission of a second radio signal, supplying second data of reception of the second radio signal by a plurality of second reception stations according to a second frequency, and calculating a second geographic position of the signal-transmitting device.
Claims14
A method for geolocating a signal-transmitting device (1), the geolocation method comprising:
- supplying first reception data (14), said first reception data resulting from the reception (13) by a plurality of first reception stations (5) of a first radio signal (4) transmitted at a first frequency by the signal-transmitting device (1), said first reception stations (5) defining a first geographic coverage zone,
- calculating (15) a first geographic position of the signal-transmitting device (1) in the first geographic coverage zone from the first reception data,
- detecting (19) that the geographic position of the signal-transmitting device (1) is included in a predefined second geographic zone (9) by comparing (16) the calculated first geographic position of the signal-transmitting device to the coordinates of the second geographic zone (9), the second geographic zone (9) being included in the first geographic coverage zone,
- transmitting (20) a transmission instruction signal to the signal-transmitting device (1) in response to the detection that the geographic position of the signal-transmitting device is in the second geographic zone, the transmission instruction signal being intended to trigger the transmission of a second radio signal (21) at a second frequency distinct from the first frequency by the signal-transmitting device (1), said first frequency being lower than the second frequency,
- supplying second reception data (24), said second reception data resulting from the reception (22) of the second radio signal (21) by a plurality of second reception stations (11), said second reception stations (11) being able to receive a radio signal at the second frequency transmitted from the second geographic zone (9), and
- calculating (25) a second geographic position of the signal-transmitting device (1) in the second geographic zone (9) from the second reception data.
3 more elements
A system for geolocating a signal-transmitting device (1), the geolocation system comprising:
- a plurality of first reception stations (5), said first reception stations (5) defining a first geographic coverage zone, said first reception stations (5) being configured to receive a first radio signal (4) transmitted by the signal-transmitting device (1) at a first frequency and from the first geographic coverage zone, the first reception stations (5) being configured to generate the first reception data resulting from the reception of said first radio signal (4),
- a plurality of second reception stations (11), said second reception stations (11) being configured to receive a second radio signal (21) transmitted by the signal-transmitting device (1) at a second frequency distinct from the first frequency and from a predefined second geographic zone (9), the second geographic zone (9) being included in the first geographic coverage zone, the second reception stations (11) being configured to generate second reception data resulting from the reception of the second radio signal (21),
- a communication network (7), the first reception stations (5) being connected to said communication network (7) and configured to transmit the first reception data to a remote server (8) via the communication network (7), the second reception stations (11) being connected to said communication network (7) and configured to transmit the second reception data to said remote server (8) via the communication network (7),
- wherein, the remote server (8) is configured to:
- calculate a first geographic position of the signal-transmitting device (1) in the first geographic coverage zone from the first reception data,
- detect that the geographic position of the signal-transmitting device (1) is included in the predefined second geographic zone (9) by comparing (16) the first geographic position of the signal-transmitting device calculated at the coordinates of the second geographic zone (9),
- transmit a transmission instruction signal to the signal-transmitting device (1) in response to the detection that the geographic position of the signal-transmitting device is in the second geographic zone, the transmission instruction signal being intended to trigger the transmission of the second radio signal (21) by the signal-transmitting device (1),
- calculate a second geographic position of the signal-transmitting device (1) in the second geographic zone (9) from the second reception data.
5 more elements
Dependencies are inferred from the claim text.