Position detecting system and position detecting server
First Claim
1. A position detecting system, comprising:
- an RFID terminal configured to transmit an identification information signal by radio;
a plurality of receiving devices configured to receive the identification information signal; and
a position detecting server configured to receive a reception notification of the identification information signal from each of the receiving devices;
wherein the RFID terminal includes a part configured to perform radio transmission of a plurality of identification information signals having different radio strengths, at designated time intervals;
the receiving devices are configured to report, when receiving each identification information signal, the reception notification of the received identification information signal to the position detecting server; and
the position detecting server includes a part configured to calculate the center of gravity of positions of receiving devices reporting the reception notifications, of each time interval,configured to determine that the RFID terminal has performed the radio transmission of a predetermined one of the identification information signals at a current time interval, depending on the number of receiving devices reporting the reception notifications of the predetermined identification information signal, andconfigured to estimate a position of the RFID terminal based on a calculation result of the center of gravity of the current time interval where a weighting factor is applied and a calculation result of the center of gravity of a previous time interval.
1 Assignment
0 Petitions
Accused Products
Abstract
A position detecting system includes an RFID terminal configured to transmit an identification information signal by radio; a plurality of receiving devices configured to receive the identification information signal; and a position detecting server configured to receive a reception notification of the identification information signal from each of the receiving device and configured to estimate a position of the RFID terminal. The RFID terminal includes a part configured to perform radio transmission of a plurality of identification information signals having different radio strengths. The position detecting server includes a part configured to integrate the reception notifications of the identification information signals having different radio strengths and configured to estimate the position of the RFID terminal.
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Citations
7 Claims
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1. A position detecting system, comprising:
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an RFID terminal configured to transmit an identification information signal by radio; a plurality of receiving devices configured to receive the identification information signal; and a position detecting server configured to receive a reception notification of the identification information signal from each of the receiving devices; wherein the RFID terminal includes a part configured to perform radio transmission of a plurality of identification information signals having different radio strengths, at designated time intervals; the receiving devices are configured to report, when receiving each identification information signal, the reception notification of the received identification information signal to the position detecting server; and the position detecting server includes a part configured to calculate the center of gravity of positions of receiving devices reporting the reception notifications, of each time interval, configured to determine that the RFID terminal has performed the radio transmission of a predetermined one of the identification information signals at a current time interval, depending on the number of receiving devices reporting the reception notifications of the predetermined identification information signal, and configured to estimate a position of the RFID terminal based on a calculation result of the center of gravity of the current time interval where a weighting factor is applied and a calculation result of the center of gravity of a previous time interval.
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2. A position detecting system, comprising:
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an RFID terminal configured to transmit an identification information signal by radio; a plurality of receiving devices configured to receive the identification information signal; and a position detecting server configured to receive a reception notification of the identification information signal from each of the receiving devices; wherein the RFID terminal includes a part configured to perform radio transmission of a plurality of identification information signals having different radio frequencies, at designated time intervals; the receiving devices are configured to report, when receiving each identification information signal, the reception notification of the received identification information signal to the position detecting server; and the position detecting server includes a part configured to calculate the center of gravity of positions of receiving devices reporting the reception notifications, of each time interval, configured to determine that the RFID terminal has performed the radio transmission of a predetermined one of the identification information signals at a current time interval, depending on the number of receiving devices reporting the reception notifications of the predetermined identification information signal, and configured to estimate a position of the RFID terminal based on a calculation result of the center of gravity of the current time interval where a weighting factor is applied and a calculation result of the center of gravity of a previous time interval.
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3. A position detecting server of a position detecting system, in which position detecting system an identification information signal transferred by radio from an RFID terminal is received by a plurality of receivers, and a reception notification of the identification information signal from each of the receivers is received by the position detecting server, wherein the RFID terminal includes a part configured to perform radio transmission of a plurality of identification information signals having different radio strengths, at designated time intervals, and the receivers are configured to report, when receiving each identification information signal, the reception notification of the received identification information signal to the position detecting server, the position detecting server comprising:
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a part configured to calculate the center of gravity of positions of receiving devices reporting the reception notifications, of each time interval, configured to determine that the RFID terminal has performed the radio transmission of a predetermined one of the identification information signals at a current time interval, depending on the number of receivers reporting the reception notifications of the predetermined identification information signal, and configured to estimate a position of the RFID terminal based on a calculation result of the center of gravity of the current time interval where a weighting factor is applied and a calculation result of the center of gravity of a previous time interval. - View Dependent Claims (4, 5)
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6. A position detecting server of a position detecting system, in which position detecting system an identification information signal transferred by radio from an RFID terminal is received by a plurality of receivers, and a reception notification of the identification information signal from each of the receivers is received by the position detecting server, wherein the RFID terminal includes a part configured to perform radio transmission of a plurality of identification information signals having different frequencies, at designated time intervals, and the receivers are configured to report, when receiving each identification information signal, the reception notification of the received identification information signal to the position detecting server, the position detecting server comprising:
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a part configured to calculate the center of gravity of positions of receiving devices reporting the reception notifications, of each time interval, configured to determine that the RFID terminal has performed the radio transmission of a predetermined one of the identification information signals at a current time interval, depending on the number of receivers reporting the reception notifications of the predetermined identification information signal, and configured to estimate a position of the RFID terminal based on a calculation result of the center of gravity of the current time interval where a weighting factor is applied and a calculation result of the center of gravity of a previous time interval. - View Dependent Claims (7)
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Specification