RF SYSTEM FOR TRACKING OBJECTS
First Claim
1. A system for tracking an object in space for position, comprising:
- a transponder device connectable to the object, the transponder device having a transponder aerial and a transponder circuit connected to the transponder aerial for receiving an RF signal through the transponder aerial, the transponder device for adding a known delay to the RF signal for thereby producing an RF response for transmitting through the transponder aerial;
first, second and third aerials;
a transmitter connected to the first aerial for transmitting the RF signal through the first aerial;
a receiver connected to the first, second and third aerials for receiving the RF response of the transponder device therethrough; and
a position calculator associated to the transmitter and the receiver for calculating a position of the object as a function of the known delay and the time period between the emission of the RF signal and the reception of the RF response from the first, second and third aerials.
2 Assignments
0 Petitions
Accused Products
Abstract
A system for tracking an object in space for position, comprises a transponder device connectable to the object. The transponder device has one or several transponder aerial(s) and a transponder circuit connected to the transponder aerial for receiving an RF signal through the transponder aerial. The transponder device adds a known delay to the RF signal thereby producing an RF response for transmitting through the transponder aerial. A transmitter is connected to a first aerial for transmitting the RF signal through a first aerial. A receiver is connected to the first, a second and third aerials for receiving the RF response of the transponder device therethrough. A position calculator is associated to the transmitter and the receiver for calculating a position of the object as a function of the known delay and the time period between the emission of the RF signal and the reception of the RF response from the first, second and third aerials. A method is also provided.
40 Citations
16 Claims
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1. A system for tracking an object in space for position, comprising:
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a transponder device connectable to the object, the transponder device having a transponder aerial and a transponder circuit connected to the transponder aerial for receiving an RF signal through the transponder aerial, the transponder device for adding a known delay to the RF signal for thereby producing an RF response for transmitting through the transponder aerial;
first, second and third aerials;
a transmitter connected to the first aerial for transmitting the RF signal through the first aerial;
a receiver connected to the first, second and third aerials for receiving the RF response of the transponder device therethrough; and
a position calculator associated to the transmitter and the receiver for calculating a position of the object as a function of the known delay and the time period between the emission of the RF signal and the reception of the RF response from the first, second and third aerials. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for tracking an object in space for position, comprising the steps of:
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emitting an RF signal from a fixed position;
receiving the RF signal with a transponder device on the object;
emitting from the transponder device an RF return signal consisting of the RF signal with a known time delay;
receiving the RF signal with at least three aerials associated to the fixed position; and
calculating a position of the object from a distance between each of the at least three aerials and the transponder device as a function of the known delay and the time period between the emission of the RF signal and the reception of the RF response from the first, second and third aerials. - View Dependent Claims (14, 15, 16)
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Specification