CALIBRATION APPARATUS AND METHOD FOR 3D POSITION/DIRECTION ESTIMATION SYSTEM
First Claim
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1. A calibration apparatus for calibrating a signal attenuation characteristic in a three-dimensional (3D) position and direction estimation system, the calibration apparatus comprising:
- an information selector to receive intensity information of a signal measured by each receiver during a predetermined period of time, to receive inertia information from a remote device during the same predetermined period of time, to select strongest intensity information for each receiver, and to verify inertia information of when the strongest intensity information is received;
an angle calculator, using at least one processor, to calculate angles between a vector of a transmitter and vectors of the respective receivers based on the inertia information verified for each receiver; and
a position calculator to calculate a 3D position of the remote device using a triangulation scheme based on the angles between the vector of the transmitter and the vectors of the respective receivers.
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Abstract
Provided is a calibration apparatus and method of a three-dimensional (3D) position and direction estimation system. The calibration apparatus may receive inertia information and intensity information during a predetermined period of time, may calculate distances between a transmitter and the respective receivers, and may calibrate a signal attenuation characteristic of each receiver using the distances between the transmitter and the respective receivers.
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Citations
25 Claims
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1. A calibration apparatus for calibrating a signal attenuation characteristic in a three-dimensional (3D) position and direction estimation system, the calibration apparatus comprising:
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an information selector to receive intensity information of a signal measured by each receiver during a predetermined period of time, to receive inertia information from a remote device during the same predetermined period of time, to select strongest intensity information for each receiver, and to verify inertia information of when the strongest intensity information is received; an angle calculator, using at least one processor, to calculate angles between a vector of a transmitter and vectors of the respective receivers based on the inertia information verified for each receiver; and a position calculator to calculate a 3D position of the remote device using a triangulation scheme based on the angles between the vector of the transmitter and the vectors of the respective receivers. - View Dependent Claims (2, 3, 4, 5, 6, 8, 9, 10)
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7. A calibration apparatus for calibrating a signal attenuation characteristic in a three-dimensional (3D) position and direction estimation system, the calibration apparatus comprising:
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an information selector to receive intensity information of a signal measured by each receiver during a predetermined period of time, to receive inertia information from a remote device during the same predetermined period of time, to select strongest intensity information for each receiver, and to verify inertia information of when the strongest intensity information is received; an angle calculator, using at least one processor, to calculate angles between a vector of a first transmitter and vectors of the respective receivers based on the inertia information verified for each receiver and between a vector of a second transmitter and vectors of the respective receivers based on the inertia information verified for each receiver; and a position calculator to calculate a 3D position of the remote device using a triangulation scheme based on the angles between the first vector of the transmitter and the vectors of the respective receivers and the second vector of the transmitter and the vectors of the respective receivers.
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11. A calibration method for calibrating a signal attenuation characteristic in a calibration apparatus of a three-dimensional (3D) position and direction estimation system, the method comprising:
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receiving intensity information of a signal measured by each receiver during a predetermined period of time, and receiving inertia information from a remote device during the same predetermined period of time; selecting strongest intensity information for each receiver; verifying inertia information of when the strongest intensity information is received; calculating, using at least one processor, angles between a vector of a transmitter and vectors of the respective receivers based on the inertia information verified for each receiver; and calculating a 3D position of the remote device using a triangulation scheme based on the angles between the vectors. - View Dependent Claims (12, 13, 14, 15, 23)
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16. A system for estimating a three-dimensional (3D) position and a direction, the system comprising:
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a transmission apparatus comprising at least one transmitter to transmit a signal for intensity measurement; a reception apparatus comprising at least three receivers to receive the signal and to measure intensity of the signal, and to output intensity information; a remote device comprising an inertia sensor to measure inertia information, and comprising one of the transmission apparatus and the reception apparatus; and a calibration apparatus to receive the inertia information and the intensity information during a predetermined period of time, to calculate, using at least one processor, distances between the at least one transmitter and the at least three receivers, and to calibrate a signal attenuation characteristic of each receiver based on the distances between the at least one transmitter and the at least three receivers. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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24. A calibration method for calibrating a signal attenuation characteristic in a calibration apparatus of a three-dimensional (3D) position and direction estimation system, the method comprising:
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receiving intensity information of a signal measured by each receiver during a predetermined period of time, and receiving inertia information from a remote device during the same predetermined period of time; selecting strongest intensity information for each receiver; verifying inertia information of when the strongest intensity information is received; calculating, using at least one processor, angles between a vector of a first transmitter and vectors of the respective receivers based on the inertia information verified for each receiver; calculating, using at least one processor, angles between a vector of a second transmitter and vectors of the respective receivers based on the inertia information verified for each receiver; and calculating a 3D position of the remote device using a triangulation scheme based on the angles between the vectors. - View Dependent Claims (25)
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Specification