Title:
LOAD CELL UNIT, WEIGHT CHECKER, ELECTRONIC WEIGHTING INSTRUMENT, AND WEIGHTING INSTRUMENT
Document Type and Number:
WIPO Patent Application WO/2008/029648
Kind Code:
A1
Abstract:
To provide a load cell unit, a weight checker and an electronic weighting instrument
both using the load cell unit. The load cell unit can favorably determine the
weight of a subject even if the ambient temperature changes. A strain inducing
member has a plurality of strain inducing parts. Strain gages, which are of temperature
sensitivity compensation type, are disposed in the respective associated strain
inducing parts. A bridge circuit is formed by the strain gages. A zero-point
compensating element compensates the zero point of the bridge circuit in accordance
with the temperature of the strain inducing member to effect a coarse correction
of the output of the bridge circuit. A temperature sensing resistor serves as
a temperature sensor for determining the temperature of the strain inducing
member. The zero-point compensating element and temperature sensing resistor
are disposed in thick portions each between adjacent strain inducing parts.
A signal processing part is used to effect a fine correction of the coarsely corrected
output of the bridge circuit. In this way, an output of the bridge circuit, which
has been subjected to a zero-point compensation in terms of circuitry, can be
further subjected to a zero-point compensation in terms of software.
Inventors:
NAITO, Kazufumi (11-8, Oginosato 7-chome Otsu-sh, Shiga 46, 5200246, JP)
内藤 和文 (〒46 滋賀県大津市仰木の里七丁目１１番８号 Shiga, 5200246, JP)
TAJIRI, Shoko (LTD. Shiga Integrated Facility 959-1, Shimomagari, Ritto-sh, Shiga 26, 5203026, JP)
内藤 和文 (〒46 滋賀県大津市仰木の里七丁目１１番８号 Shiga, 5200246, JP)
TAJIRI, Shoko (LTD. Shiga Integrated Facility 959-1, Shimomagari, Ritto-sh, Shiga 26, 5203026, JP)
Application Number:
JP2007/066489
Publication Date:
March 13, 2008
Filing Date:
August 24, 2007
Export Citation:
Assignee:
ISHIDA CO., LTD. (44 Sanno-cho, Shogoin Sakyo-ku, Kyoto-sh, Kyoto 92, 6068392, JP)
株式会社イシダ (〒92 京都府京都市左京区聖護院山王町４４番地 Kyoto, 6068392, JP)
NAITO, Kazufumi (11-8, Oginosato 7-chome Otsu-sh, Shiga 46, 5200246, JP)
内藤 和文 (〒46 滋賀県大津市仰木の里七丁目１１番８号 Shiga, 5200246, JP)
株式会社イシダ (〒92 京都府京都市左京区聖護院山王町４４番地 Kyoto, 6068392, JP)
NAITO, Kazufumi (11-8, Oginosato 7-chome Otsu-sh, Shiga 46, 5200246, JP)
内藤 和文 (〒46 滋賀県大津市仰木の里七丁目１１番８号 Shiga, 5200246, JP)
International Classes:
G01G3/18; B07C5/18; G01G3/14; G01G11/00; G01L1/22; G01G3/00; B07C5/00; G01G11/00; G01L1/20
Attorney, Agent or Firm:
YOSHITAKE, Hidetoshi et al. (10th floor, Sumitomo-seimei OBP Plaza Bldg. 4-70, Shiromi 1-chome, Chuo-ku, Osaka-sh, Osaka 01, 5400001, JP)
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