JPS57156504A - Position recognition device - Google Patents

Position recognition device

Info

Publication number
JPS57156504A
JPS57156504A JP4029281A JP4029281A JPS57156504A JP S57156504 A JPS57156504 A JP S57156504A JP 4029281 A JP4029281 A JP 4029281A JP 4029281 A JP4029281 A JP 4029281A JP S57156504 A JPS57156504 A JP S57156504A
Authority
JP
Japan
Prior art keywords
screen
correction
pulses
correcting
distortion
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
JP4029281A
Other languages
Japanese (ja)
Inventor
Yoshihiko Kiyokuni
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP4029281A priority Critical patent/JPS57156504A/en
Publication of JPS57156504A publication Critical patent/JPS57156504A/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
    • G01B11/022—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of tv-camera scanning

Landscapes

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

Abstract

PURPOSE:To improve precision by arranging a transparent plate provided with correction parts, projected at four corners of a screen, between a body to be measured and a TV camera, counting and correcting the width of each correction pattern, and thus correcting the position size of each part of the screen. CONSTITUTION:A TV camera 10 picks up an image of a body 1 to be measured through a transparent plate 6 to project correction patterns on a screen. Then, line intervals l1-l4 of the correction patterns at four corners are counted by sampling pulses. When the number of counted pulses of the line intervals l1-l4 are n1-n4, the corrected values of respective correction pattern areas are N/n1, N/n2, N/n3, and N/n4 (where N is the number of pulses corresponding to the line interval). For this purpose, values obtained by actual measurement on the screen are multiplied by those corrected values to find correct positions. This position recognition device, even when the linearity of an image pickup tube is uneven, recognizes the positions of respective parts accurately even by the distortion of magnification without reference to the distortion of magnification due to initial drift.
JP4029281A 1981-03-23 1981-03-23 Position recognition device Pending JPS57156504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4029281A JPS57156504A (en) 1981-03-23 1981-03-23 Position recognition device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4029281A JPS57156504A (en) 1981-03-23 1981-03-23 Position recognition device

Publications (1)

Publication Number Publication Date
JPS57156504A true JPS57156504A (en) 1982-09-27

Family

ID=12576523

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4029281A Pending JPS57156504A (en) 1981-03-23 1981-03-23 Position recognition device

Country Status (1)

Country Link
JP (1) JPS57156504A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4879664A (en) * 1985-05-23 1989-11-07 Kabushiki Kaisha Toshiba Three-dimensional position sensor and three-dimensional position setting system
WO1990007690A1 (en) * 1985-05-23 1990-07-12 Toshimitsu Suyama Sensor and system for setting three-dimensional position
JPH04355306A (en) * 1991-06-03 1992-12-09 Seikosha Co Ltd Method for compensating for distortion in image recognition device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53119079A (en) * 1977-03-26 1978-10-18 Tatsu Akutsu Measuring method of diameter of running filamentous articles

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53119079A (en) * 1977-03-26 1978-10-18 Tatsu Akutsu Measuring method of diameter of running filamentous articles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4879664A (en) * 1985-05-23 1989-11-07 Kabushiki Kaisha Toshiba Three-dimensional position sensor and three-dimensional position setting system
WO1990007690A1 (en) * 1985-05-23 1990-07-12 Toshimitsu Suyama Sensor and system for setting three-dimensional position
JPH04355306A (en) * 1991-06-03 1992-12-09 Seikosha Co Ltd Method for compensating for distortion in image recognition device

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