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Title:
INFORMATION READING DEVICE AND INFORMATION READING METHOD
Document Type and Number:
WIPO Patent Application WO/2015/147045
Kind Code:
A1
Abstract:
In an information reading device (9), a maximum amplitude value detecting unit (41) detects the maximum amplitude value within one period of detected data in a variation correction coefficient calculating signal produced by a variation correction coefficient calculating signal generator (7). An inter-line adding unit (43) outputs the sum of the maximum amplitude values for a prescribed number of lines. A peak detecting unit (45) divides the sum of the maximum amplitude values by the prescribed number of lines, and outputs the peak value of the maximum amplitude values. A reference value calculating unit (47) calculates a reference value from the peak value of the maximum amplitude values, and outputs said reference value. A divider (48) uses the peak values of the maximum amplitude values on the positive side and the negative side, and the reference value, to correct variations in the detected data, and outputs variation-corrected detected data.

Inventors:
YAMANAKA SATOSHI (JP)
FUJIYAMA NAOYUKI (JP)
TOYODA YOSHITAKA (JP)
OGOMI TOMOKAZU (JP)
Application Number:
PCT/JP2015/059101
Publication Date:
October 01, 2015
Filing Date:
March 25, 2015
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G07D7/00; G01R33/02; G01R33/09; G06K7/08; G07D7/04
Domestic Patent References:
WO2013023781A22013-02-21
WO2012014546A12012-02-02
Foreign References:
JPH0275087A1990-03-14
JP2011103088A2011-05-26
JPH0526993A1993-02-05
JPH08201493A1996-08-09
JPS6282373A1987-04-15
Attorney, Agent or Firm:
INABA, Tadahiko et al. (JP)
Tadahiko Inaba (JP)
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