JPS6425038A - Measuring device of physical amount of sheet-like porous material - Google Patents

Measuring device of physical amount of sheet-like porous material

Info

Publication number
JPS6425038A
JPS6425038A JP18197987A JP18197987A JPS6425038A JP S6425038 A JPS6425038 A JP S6425038A JP 18197987 A JP18197987 A JP 18197987A JP 18197987 A JP18197987 A JP 18197987A JP S6425038 A JPS6425038 A JP S6425038A
Authority
JP
Japan
Prior art keywords
light
sheet
porous material
measuring
holes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP18197987A
Other languages
Japanese (ja)
Inventor
Toshitsugu Ueda
Seiichiro Kiyobe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yokogawa Electric Corp filed Critical Yokogawa Electric Corp
Priority to JP18197987A priority Critical patent/JPS6425038A/en
Publication of JPS6425038A publication Critical patent/JPS6425038A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/86—Investigating moving sheets

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

PURPOSE:To avoid errors in measuring physical amount of a sheet-like porous material even if the sheet-like porous material has many holes, by irradiating a measuring light and a reference light to the sheet-like porous material, collecting the lights which pass through the holes in the material and reaches a light receiving part onto the focus of a focusing lens to be absorbed or extinguished by a light absorbing plate. CONSTITUTION:Light from a white light source 6 is turned to be an intermittent light by a chopper wheel 8 through a collimator lens 7. The wheel 8 which is provided with a filter 9 for a measuring light and with a filter 10 for a reference light irradiates alternately the measuring light and the reference light to a sheet-like porous material, for example, a sheet of paper 3. The light incident upon a focusing lens 11 does not gather on the focus of the lens 11 because the light is scattered light and is not absorbed by a light absorbing plate 15. Therefore, the light entering an integration ball 14 is reflected irregularly on the inner surface of the ball and detected by a light receiving element 12. On the contrary, the light passing through the holes of the sheet of paper 3 reaches the focusing lens 11 as the parallel light as it is, and is gathered on the focus of the lens 11 to be absorbed by the light absorbing plate 15 to be extinguished. Therefore, since the light passing through the holes of the paper 3 is never detected, the measuring value is not affected thereby.
JP18197987A 1987-07-21 1987-07-21 Measuring device of physical amount of sheet-like porous material Pending JPS6425038A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18197987A JPS6425038A (en) 1987-07-21 1987-07-21 Measuring device of physical amount of sheet-like porous material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18197987A JPS6425038A (en) 1987-07-21 1987-07-21 Measuring device of physical amount of sheet-like porous material

Publications (1)

Publication Number Publication Date
JPS6425038A true JPS6425038A (en) 1989-01-27

Family

ID=16110203

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18197987A Pending JPS6425038A (en) 1987-07-21 1987-07-21 Measuring device of physical amount of sheet-like porous material

Country Status (1)

Country Link
JP (1) JPS6425038A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0453797A2 (en) * 1990-04-26 1991-10-30 Yokogawa Electric Corporation Infrared ray moisture meter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0453797A2 (en) * 1990-04-26 1991-10-30 Yokogawa Electric Corporation Infrared ray moisture meter

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