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公开(公告)号：US20170205502A1
公开(公告)日：2017-07-20
申请号：US15391832
申请日：2016-12-27
Inventor： NAOKI HONMA , DAI SASAKAWA
CPC classification number: G01S13/42 , G01S7/354 , G01S7/415 , G01S13/003 , G01S13/88
Abstract: A positioning sensor includes a transmission antenna transmitting a transmission signal, a plurality of reception antennae, each receiving a reception signals, a receiver observing the each of the plurality of reception signals in a predetermined period, a processor, and a memory, in which the processor calculates a plurality of complex transfer functions based on the each of the plurality of reception signals, records each of the plurality of complex transfer functions in the memory as being associated with each time point, extracts, among the plurality of complex transfer functions, a plurality of pairs of two complex transfer functions respectively corresponding to two time points in a predetermined interval, calculates a plurality of pieces of differential information, and estimates to a location of a moving body based on each of the plurality of pieces of differential information.
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公开(公告)号：US20180192919A1
公开(公告)日：2018-07-12
申请号：US15851858
申请日：2017-12-22
Inventor： TAKESHI NAKAYAMA , SHOICHI IIZUKA , NAOKI HONMA , DAI SASAKAWA
CPC classification number: A61B5/1116 , A61B5/024 , A61B5/0507 , A61B5/0816 , A61B5/1113 , A61B5/1117 , A61B2562/0228 , A61B2562/046 , G01B15/00 , G01S7/411 , G01S7/415 , G01S13/003 , G01S13/42 , G01S13/88 , G01S13/89
Abstract: A sensor includes: a transmitting antenna with N transmitting antenna elements transmitting transmission signals; a receiving antenna with M receiving antenna elements, each receiving N received signals including a reflection signal generated by the living body reflecting part of the N transmission signals; a circuit; and a memory. The circuit extracts a second matrix corresponding to a specified frequency range from an N×M first matrix calculated from each received signal and indicating a propagation property between each transmitting antenna element and each receiving antenna element, estimates the position where the living body is present using the second matrix, calculates a radar cross-section (RCS) value of the living body based on the estimated position and the positions of the transmission and receiving antennas, and estimates the motion of the living body using the calculated RCS value and information indicating correspondence between RCS values and motions of the living body.
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公开(公告)号：US20180011169A1
公开(公告)日：2018-01-11
申请号：US15631367
申请日：2017-06-23
Inventor： TAKESHI NAKAYAMA , SHOICHI IIZUKA , NAOKI HONMA , DAI SASAKAWA
CPC classification number: G01S7/292 , G01S7/354 , G01S7/411 , G01S13/003 , G01S13/42 , G01S13/50 , G01S13/66 , G01S13/89 , G01S2007/356
Abstract: A sensor includes a transmit antenna, a receive antenna, circuitry, and a memory. The transmit antenna includes N transmit antenna elements each transmitting a transmit signal. The receive antenna includes M receive antenna elements each receiving N receive signals including reflection signals reflected by an organism. The circuitry extracts a second matrix corresponding to a predetermined frequency range from an N×M first matrix representing propagation characteristics between each transmit antenna element and each receive antenna element calculated from the receive signals. The circuitry estimates the position of the organism by using the second matrix, and calculates a radar cross-section value with respect to the organism, based on the estimated position and the positions of the transmit antenna and the receive antenna. The circuitry then estimates the posture of the organism by using the calculated radar cross-section value and information indicating associations between radar cross-section values and postures of the organism.
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