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Volume 22 Issue 3
Sep.  2013
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Article Navigation >  LASER TECHNOLOGY  > 1998 >  22(3): 136-139

Citation:
shu

Optical triangle method for rea-l time measuring thickness of metal plate

  • 1.

    Institute of Laser, Yunnan Polytechnic University, Kunming, 650051

  • Received Date: 1997-08-25
    Accepted Date: 1997-10-12
  • The oblique incident laser beam is projects on a metal plate,then reflected and imaged on a photocell with a lens.While the plate has a movement,the laser spot will depart from the photocell.Using a turning mirror to make the laser beam to scan a special position,the laser image spot can return to photocell.By measurement of the scanning angle of the laser beam,the displacement of the metal plate can be calculated.So the method can be applied to measure the thickness of the metal plate.In order to eliminate the influence of the variation of reflectance of metal surface,the correct method is presented.The method is no contact and can be used in real time measurements.
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  • [1] 程时琦,杨齐民,张文碧 et al.云南工学院学报,1992;8(1):127~130
    [2] 刘振玉.光电技术北京:北京理工大学出版社,1990:14~316
    [3] 张志锐,邹延引数字电路设计手册与实用电路广州:华南理工大学出版社,1989:156~159
    [4] 郝鸿安.民用电子线路实用手册北京:中国计量出版社,1989:60~63
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  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

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Optical triangle method for rea-l time measuring thickness of metal plate

  • 1. Institute of Laser, Yunnan Polytechnic University, Kunming, 650051
  • Received Date: 1997-08-25
  • Accepted Date: 1997-10-12
  • Available Online: 1998-05-25

Abstract: The oblique incident laser beam is projects on a metal plate,then reflected and imaged on a photocell with a lens.While the plate has a movement,the laser spot will depart from the photocell.Using a turning mirror to make the laser beam to scan a special position,the laser image spot can return to photocell.By measurement of the scanning angle of the laser beam,the displacement of the metal plate can be calculated.So the method can be applied to measure the thickness of the metal plate.In order to eliminate the influence of the variation of reflectance of metal surface,the correct method is presented.The method is no contact and can be used in real time measurements.

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