JPS57163804A - Photoelectric discriminating circuit for paper thickness - Google Patents

Photoelectric discriminating circuit for paper thickness

Info

Publication number
JPS57163804A
JPS57163804A JP4884081A JP4884081A JPS57163804A JP S57163804 A JPS57163804 A JP S57163804A JP 4884081 A JP4884081 A JP 4884081A JP 4884081 A JP4884081 A JP 4884081A JP S57163804 A JPS57163804 A JP S57163804A
Authority
JP
Japan
Prior art keywords
light
circuit
converting circuit
photoelectric converting
paper thickness
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
JP4884081A
Other languages
Japanese (ja)
Inventor
Hidetoshi Ueda
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP4884081A priority Critical patent/JPS57163804A/en
Publication of JPS57163804A publication Critical patent/JPS57163804A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE:To eliminate the need for adjustments for the variance of elements of a phtoelectric converting circuit and for their secular changes, by inspecting paper thickness after correcting the quantity of light from a light source so that every time a form is conveyed, the photoelectric converting circuit is irradiated with a constant quantity of light. CONSTITUTION:When a form 5 conveyed reaches a form detecting circuit and is detected, a circuit 7 switching input impedance lowers the input impedance of a photoelectric converting circuit 2, which becomes hard to saturate. At the same time, a circuit 8 which controls the quantity of light varies the quantity of light from a light source 1 until an input voltage level discriminating circuit 4 the output of the photoelectric converting circuit 2 coinciding with a certain reference voltage, and the light quantity control value is held equal to a value when it is detected. After a series of said operations, the form 5 is conveyed to between the light source 1 and photoelectric converting circuit 2 to inspect and discriminate the paper thickness.
JP4884081A 1981-04-01 1981-04-01 Photoelectric discriminating circuit for paper thickness Pending JPS57163804A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4884081A JPS57163804A (en) 1981-04-01 1981-04-01 Photoelectric discriminating circuit for paper thickness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4884081A JPS57163804A (en) 1981-04-01 1981-04-01 Photoelectric discriminating circuit for paper thickness

Publications (1)

Publication Number Publication Date
JPS57163804A true JPS57163804A (en) 1982-10-08

Family

ID=12814438

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4884081A Pending JPS57163804A (en) 1981-04-01 1981-04-01 Photoelectric discriminating circuit for paper thickness

Country Status (1)

Country Link
JP (1) JPS57163804A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0371005A (en) * 1989-08-09 1991-03-26 Sunstar Eng Inc Method and device for inspecting thin film-shaped coating agent

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0371005A (en) * 1989-08-09 1991-03-26 Sunstar Eng Inc Method and device for inspecting thin film-shaped coating agent

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