Position detection system, position detection method therefor, position detection communication device, and communication device
First Claim
1. A position detection system for detecting a relay device, comprising:
- a plurality of first communication devices, each of plurality of the first communication devices including a first transmitter for transmitting a distance-calculation signal for calculating distance to a second communication device, a detector for detecting, by receiving from the second communication device a signal corresponding to the distance-calculation signal, phase difference between the distance-calculation signal when transmitted and the signal corresponding to the distance-calculation signal when received, and a calculator for calculating the distance to the second communication device, based on the phase difference detected by the detector;
the second communication device including a second transmitter for transmitting the signal corresponding to the distance-calculation signal transmitted by plurality of the first communication devices;
a determining unit for determining whether or not the multiple distances to the second communication device, calculated by plurality of the calculators of plurality of the first communication devices, are below a predetermined distance; and
a position detector for detecting the position of the relay device corresponding to the multiple distances on the basis of the determining result when the determining unit has determined that the multiple distances to the second communication device, calculated by plurality of the calculators of plurality of the first communication devices, are at or above the predetermined distance, wherein in a state where communication between plurality of the first communication devices and the second communication device is not possible due to multiple distances between plurality of the first communication devices and the second communication device being at or above the predetermined distance, enables communication between plurality of the first communication devices and the second communication device.
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Accused Products
Abstract
In a position detection system, a plurality of first communication devices each comprise a transmitter for transmitting a distance-calculation signal for calculating distance to the second communication device; a detector for detecting, by receiving from the second communication device a signal corresponding to the distance-calculation signal, phase difference between the distance-calculation signal when transmitted and the signal corresponding to the distance-calculation signal when received; and a calculator for calculating the distance to the second communication device, based on the phase difference. A second communication device comprises a transmitter for transmitting the signal corresponding to the distance-calculation signal. The position detection system comprises a determining unit for determining whether the multiple distances are below a predetermined distance; and a position detector for detecting the position of a relay device corresponding to the multiple distances when the determining unit has determined that the multiple distances are at or above the predetermined distance.
32 Citations
15 Claims
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1. A position detection system for detecting a relay device, comprising:
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a plurality of first communication devices, each of plurality of the first communication devices including a first transmitter for transmitting a distance-calculation signal for calculating distance to a second communication device, a detector for detecting, by receiving from the second communication device a signal corresponding to the distance-calculation signal, phase difference between the distance-calculation signal when transmitted and the signal corresponding to the distance-calculation signal when received, and a calculator for calculating the distance to the second communication device, based on the phase difference detected by the detector;
the second communication device including a second transmitter for transmitting the signal corresponding to the distance-calculation signal transmitted by plurality of the first communication devices;
a determining unit for determining whether or not the multiple distances to the second communication device, calculated by plurality of the calculators of plurality of the first communication devices, are below a predetermined distance; and
a position detector for detecting the position of the relay device corresponding to the multiple distances on the basis of the determining result when the determining unit has determined that the multiple distances to the second communication device, calculated by plurality of the calculators of plurality of the first communication devices, are at or above the predetermined distance, wherein in a state where communication between plurality of the first communication devices and the second communication device is not possible due to multiple distances between plurality of the first communication devices and the second communication device being at or above the predetermined distance, enables communication between plurality of the first communication devices and the second communication device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A position detection system for detecting a relay device, comprising:
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a first communication device, the first communication device including a first transmitter for transmitting a distance-calculation signal for calculating distance to the second communication device, a plurality of receivers for receiving from the second communication device a signal corresponding to the distance-calculation signal, a detector for detecting, by means of plurality of the receivers receiving from the second communication device the signal corresponding to the distance-calculation signal, a plurality of phase differences between the distance-calculation signal when transmitted and the signal corresponding to the distance-calculation signal when received, and a calculator for calculating the multiple distances to the second communication device, based on plurality of the phase differences detected by the detector;
the second communication device comprising;
a second transmitter for transmitting the signal corresponding to the distance-calculation signal transmitted by the first communication device;
the position detection system further comprising;
a determining unit for determining whether or not the multiple distances to the second communication device, calculated by the calculator, are below a predetermined distance; and
a position detector for detecting the position of the relay device corresponding to the multiple distances on the basis of the determining result when the determining unit has determined that the multiple distances to the second communication device, calculated by the calculator, are at or above the predetermined distance, wherein in a state where communication between the first communication device and the second communication device is not possible due to the multiple distances between the first communication device and the second communication device being at or above the predetermined distance, enables communication between the first communication device and the second communication device
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13. A position detection method for a position detection system for detecting a relay device, comprising:
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transmitting by means of each of a plurality of first communication devices a distance-calculation signal for calculating distance to a second communication device;
transmitting by means of the second communication device a signal corresponding to the distance-calculation signal transmitted by plurality of the first communication devices;
detecting by means of each of plurality of the first communication devices, by receiving from the second communication device the signal corresponding to the distance-calculation signal, phase difference between the distance-calculation signal when transmitted and the signal corresponding to the distance-calculation signal when received;
calculating by means of each of plurality of the first communication devices the distance to the second communication device, based on the phase difference;
determining whether or not the multiple distances to the second communication device, calculated by plurality of the first communication devices, are below a predetermined distance and, when a determination has been made that the multiple distances to the second communication device, calculated by plurality of the first communication devices, are at or above the predetermined distance, detecting the position of the relay device corresponding to the multiple distances, wherein in a state where communication between plurality of the first communication devices and the second communication device is not possible due to multiple distances between plurality of the first communication devices and the second communication device being at or above the predetermined distance, enables communication between plurality of the first communication devices and the second communication device.
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14. A position detection communication device for detecting a relay device, comprising:
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a plurality of distance-calculation communication devices, each of plurality of the distance-calculation communication device including a transmitter for transmitting a distance-calculation signal for calculating distance to the partner communication device, a detector for detecting, by receiving from the partner communication device a signal corresponding to the distance-calculation signal, phase difference between the distance-calculation signal when transmitted and the signal corresponding to the distance-calculation signal when received, and a calculator for calculating the distance to the partner communication device, based on the phase difference detected by the detector;
a determining unit for determining whether or not multiple distances to the partner communication device, calculated by plurality of the calculators of plurality of the distance-calculation communication devices, are below a predetermined distance; and
a position detector for detecting the position of the relay device corresponding to the multiple distances on the basis of the determining result when the determining unit has determined that the multiple distances to the partner communication device, calculated by plurality of the calculators of plurality of the distance-calculation communication devices, are at or above the predetermined distance, wherein in a state where communication with a partner communication device is not possible due to the multiple distances to the partner communication device being at or above the predetermined distance, enables communication with the partner communication device.
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15. A communication device which can communicate with a partner communication device, the partner communication device having
a plurality of distance-calculation communication devices that each transmits a distance-calculation signal to calculate distance; - detects, by receiving a signal corresponding to the distance-calculation signal that is returned, phase difference between the distance-calculation signal when transmitted and the signal corresponding to the distance-calculation signal when received; and
calculates the distance to the transmission position of the signal corresponding to the distance-calculation signal, based on the phase difference;
the partner communication device which;
in order to detect the position of a relay device that, where reception of the signal corresponding to the distance-calculation signal, from the transmission position, is not possible due to multiple distances, calculated by plurality of the distance-calculation communication devices, being at or above a predetermined distance, enables reception by plurality of the distance-calculation communication devices of the signal corresponding to the distance-calculation signal from the transmission position, determines whether or not the multiple distances calculated by plurality of the distance-calculation communication devices are below the predetermined distance, and detects the position of the relay device corresponding to the multiple distances on the basis of the determining result when the multiple distances calculated by plurality of the distance-calculation communication devices are determined to be at or above the predetermined distance, the communication device comprising;
a transmitter for transmitting the signal corresponding to the distance-calculation signal transmitted by the partner communication device.
- detects, by receiving a signal corresponding to the distance-calculation signal that is returned, phase difference between the distance-calculation signal when transmitted and the signal corresponding to the distance-calculation signal when received; and
Specification