Title:
DEVICE FOR MEASURING AND METHOD FOR MEASURING FLUID CONCENTRATION
Document Type and Number:
WIPO Patent Application WO/2014/049831
Kind Code:
A1
Abstract:
[Problem] To highly precisely measure the concentration of a fluid such as a chemical or blood flowing within a duct even if light emission strength, the wall thickness of the duct, or the like is unclear or varies. [Solution] The present invention is characterized in that: when measuring the concentration of a fluid flowing within a duct having a light-transmissive tube wall, light is supplied from a light source into the duct at a plurality of light supply locations on the surface of the duct arranged adjacent to each other along the direction of extension of the duct; at each of a plurality of light reception locations on the surface of the duct positioned at the reverse side in the diametral direction of the duct from the light supply locations, the arriving light is received that has been supplied and has traversed the interior of the fluid flowing within the duct and the interior of the wall of the duct, and the strength of the light is determined; on the basis of the Beer-Lambert Law from the strength of the light at the light reception locations, a plurality of relational expressions are determined indicating the relationship between the concentration of the fluid and the strength of light when receiving light from each of the plurality of light supply locations respectively at the plurality of light reception locations; by means of combining the relational expressions with respect to the plurality of light supply locations, a relational expression is determined indicating the relationship between the concentration of the fluid and the strength of light at the plurality of light reception locations; and on the basis of the relational expression, the concentration of the fluid is determined from the strength of light at the plurality of light reception locations, and is output.
Inventors:
SANO YOSHIHIKO (JP)
HARADA MASAHIDE (JP)
HARADA MASAHIDE (JP)
Application Number:
PCT/JP2012/075082
Publication Date:
April 03, 2014
Filing Date:
September 28, 2012
Export Citation:
Assignee:
NIPRO CORP (JP)
HARADA ELECTRONICS CO LTD (JP)
HARADA ELECTRONICS CO LTD (JP)
International Classes:
G01N21/59; G01N21/27; G01N33/49
Foreign References:
| JPS6357566U | 1988-04-16 | |||
| JPH0638947A | 1994-02-15 | |||
| JPH0854339A | 1996-02-27 | |||
| JP2003021594A | 2003-01-24 |
Attorney, Agent or Firm:
GINZA MARONIE P. C. (JP)
Patent business corporation Ginza horse chestnut patent firm (JP)
Patent business corporation Ginza horse chestnut patent firm (JP)
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