PROCESS AND SYSTEM TO DETERMINE TEMPORAL CHANGES IN RETRANSMISSION AND PROPAGATION OF SIGNALS USED TO MEASURE DISTANCES, SYNCRONIZE ACTUATORS AND GEOREFERENCE APPLICATIONS
First Claim
1. Process to determine temporal changes in retransmission and propagation of signals, to measure distances, synchronize actuators, and georeferencing, characterized by the fact of comprehending the steps of:
- a—
installing four reference bases on the ground, every three of them not collinear, at known geographic positions and visible from the repeater station;
b—
emitting, at a reference instant and from a transmitter device provided a tone of the above mentioned reference bases, one time coded signal containing the identification of the emitting reference base and of the instant of emission;
c—
receiving, in a receiver device installed at each one of the four reference bases the coded signal, received and retransmitted by the repeater station;
d—
attributing, systematically, different arbitrary values to the change in time, phase or frequency, to the repeater and calculate, for each one of the attributed temporal change, one respective position difference for the repeater station obtained with the use of two distinct sets of three reference bases;
e—
identifying which one of the attributed values for the temporal changes at the repeater results in a minimum difference between the two positions of the repeater station, obtained using two distinct sets of three reference bases; and
f—
utilizing the temporal change found in “
e”
to determine the position of the repeater.
1 Assignment
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Accused Products
Abstract
The proposed solution includes the use of four reference bases on the ground at known positions, with a coded time signal transmitted by one of them which is retransmitted by the repeater station and received by each of the reference bases. Using two distinct sets of three reference bases it is possible to calculate the differences between two positions for the repeater station, assigning to the later changes in time, phase or frequency as well as temporal changes due to the signal propagation in the medium, for the respective elevation angles found for the repeater. It can be then identified which values attributed to the temporal changes produces a minimum difference between the two respective positions of the repeater station. The identified temporal change can be used for the correct determination of the repeater station and its use on pertinent applications.
16 Citations
15 Claims
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1. Process to determine temporal changes in retransmission and propagation of signals, to measure distances, synchronize actuators, and georeferencing, characterized by the fact of comprehending the steps of:
-
a—
installing four reference bases on the ground, every three of them not collinear, at known geographic positions and visible from the repeater station;b—
emitting, at a reference instant and from a transmitter device provided a tone of the above mentioned reference bases, one time coded signal containing the identification of the emitting reference base and of the instant of emission;c—
receiving, in a receiver device installed at each one of the four reference bases the coded signal, received and retransmitted by the repeater station;d—
attributing, systematically, different arbitrary values to the change in time, phase or frequency, to the repeater and calculate, for each one of the attributed temporal change, one respective position difference for the repeater station obtained with the use of two distinct sets of three reference bases;e—
identifying which one of the attributed values for the temporal changes at the repeater results in a minimum difference between the two positions of the repeater station, obtained using two distinct sets of three reference bases; andf—
utilizing the temporal change found in “
e”
to determine the position of the repeater. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. System to determine temporal changes in retransmission and propagation of signals, addressed for measurement of distances, synchronize actuators and georeferencing, from a remote and inaccessible repeater station, containing a transponder, being such system characterized by the fact of comprehending:
-
a—
four reference bases on the ground, every three of them not collinear, at known geograghic positions and visible from the repeater station;b—
one transmitting device provided a tone of the bases capable to emit, at a reference instant, a time coded signal containing the identification of the reference transmitting base and of the instant of emission;c—
one receiving device installed at each one of the four reference bases capable to receive the time coded signal, emitted by the transmitting device and received and retransmitted by the repeater station;d—
precision clocks each one installed at every one of the four reference bases;e—
one central processing station that receives the coded time signal, retransmitted by the by the repeater station, comparing it to the coded time signal generated at the emitting reference base and assigning different arbitrary values for the changes in time, phase or frequency, to the repeater station calculating, for each of the assigned temporal changes, a respective difference between positions for the repeater station, obtained with use of two distinct sets of three reference, identifying which value assigned to the temporal change at the repeater results in a minimum difference between the two positions found for the repeater station, and processing the corresponding temporal change to determine the position of the repeater station; andf—
one transmission mean or device provided at each of three reference bases, distinct from that transmitter that generates the coded time signal, with each transmission mean or device forwarding to the central processing station the time difference between the coded time signal received from the transponder at the repeater station and the respective coded time signal generated at each one of the referred three reference bases. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification