SE8801431L - MAETANORDNING - Google Patents

MAETANORDNING

Info

Publication number
SE8801431L
SE8801431L SE8801431A SE8801431A SE8801431L SE 8801431 L SE8801431 L SE 8801431L SE 8801431 A SE8801431 A SE 8801431A SE 8801431 A SE8801431 A SE 8801431A SE 8801431 L SE8801431 L SE 8801431L
Authority
SE
Sweden
Prior art keywords
photo sensor
photo
time point
parallel
beams
Prior art date
Application number
SE8801431A
Other languages
Swedish (sv)
Other versions
SE460927B (en
SE8801431D0 (en
Inventor
R Uusijaervi
Original Assignee
Traeteknikcentrum Inst Foer Tr
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 Traeteknikcentrum Inst Foer Tr filed Critical Traeteknikcentrum Inst Foer Tr
Priority to SE8801431A priority Critical patent/SE460927B/en
Publication of SE8801431D0 publication Critical patent/SE8801431D0/en
Publication of SE8801431L publication Critical patent/SE8801431L/en
Publication of SE460927B publication Critical patent/SE460927B/en

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
    • G01B11/04—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness specially adapted for measuring length or width of objects while moving

Landscapes

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

Abstract

The invention is a device for length measurements of movable logs or other objects with an outer structure with the help of a photo sensor (1). In a measurement zone, the object reflects beams which is registered in such a way that only parallel or almost parallel beams are permitted to meet a number of photo sensors, essentially placed in line with the direction in which the log (2) or other object is to be moved. The signal from the photo sensor is collected via an amplifier and analogue-digital converter (14) with short time intervals to a counting computer (5). Through subtraction of the signals from a centrally placed number of photo sensors, window (B) from a first time point with corresponding signals with a second time point following directly thereafter, so that the set difference function is formed with the photo sensor position as an independent variable. Movement during the time interval corresponds to a minimum of this function.<IMAGE>
SE8801431A 1988-04-18 1988-04-18 Device for measuring one dimension of an illuminated object with a structured surface SE460927B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8801431A SE460927B (en) 1988-04-18 1988-04-18 Device for measuring one dimension of an illuminated object with a structured surface

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8801431A SE460927B (en) 1988-04-18 1988-04-18 Device for measuring one dimension of an illuminated object with a structured surface

Publications (3)

Publication Number Publication Date
SE8801431D0 SE8801431D0 (en) 1988-04-18
SE8801431L true SE8801431L (en) 1989-10-19
SE460927B SE460927B (en) 1989-12-04

Family

ID=20372045

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8801431A SE460927B (en) 1988-04-18 1988-04-18 Device for measuring one dimension of an illuminated object with a structured surface

Country Status (1)

Country Link
SE (1) SE460927B (en)

Also Published As

Publication number Publication date
SE460927B (en) 1989-12-04
SE8801431D0 (en) 1988-04-18

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