Title:
PASSIVE SENSOR, WIRELESS TYPE SENSOR SYSTEM, AND MEASUREMENT METHOD USING WIRELESS TYPE SENSOR SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/162148
Kind Code:
A1
Abstract:
This invention is directed to achievement of a wireless type sensor system that exhibits high measurement precision even if individual differences exist due to the variations in manufacture between sensor elements or the like. A passive sensor (10) comprises a SAW resonator (12) and an identification mark (13). The identification mark (13) is a mark corresponding to identification group information (Gr). A master device (20) transmits an excitation signal (SpL) to the passive sensor (10) and receives a resonation signal (Sfp) of the SAW resonator (12) to acquire a resonation frequency (fp). Further, the master device (20) reads the identification mark (13) to acquire the identification group information (Gr). The master device (20) then calculates a magnetic intensity on the basis of the resonation signal (fp), the identification group information (Gr) and a magnetic intensity-to-frequency characteristic for each of a plurality of pieces of identification group information (Gr) stored in advance.
Inventors:
ITO Yoshihiro (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
伊藤吉博 (〒55 京都府長岡京市東神足１丁目１０番１号 株式会社 村田製作所内 Kyoto, 〒6178555, JP)
ITO Shigeo (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
伊藤吉博 (〒55 京都府長岡京市東神足１丁目１０番１号 株式会社 村田製作所内 Kyoto, 〒6178555, JP)
ITO Shigeo (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2011/063764
Publication Date:
December 29, 2011
Filing Date:
June 16, 2011
Export Citation:
Assignee:
Murata Manufacturing Co., Ltd. (10-1, Higashikotari 1-chome Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
株式会社村田製作所 (〒55 京都府長岡京市東神足１丁目１０番１号 Kyoto, 〒6178555, JP)
ITO Yoshihiro (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
伊藤吉博 (〒55 京都府長岡京市東神足１丁目１０番１号 株式会社 村田製作所内 Kyoto, 〒6178555, JP)
株式会社村田製作所 (〒55 京都府長岡京市東神足１丁目１０番１号 Kyoto, 〒6178555, JP)
ITO Yoshihiro (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
伊藤吉博 (〒55 京都府長岡京市東神足１丁目１０番１号 株式会社 村田製作所内 Kyoto, 〒6178555, JP)
International Classes:
G01D21/00; G01D3/02; G08C17/00; G08C19/12
Attorney, Agent or Firm:
Kaede Patent Attorneys' Office (1-4-34, Noninbashi Chuo-ku, Osaka-sh, Osaka 11, 〒5400011, JP)
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