JPS57163806A - Shape detector - Google Patents

Shape detector

Info

Publication number
JPS57163806A
JPS57163806A JP4983381A JP4983381A JPS57163806A JP S57163806 A JPS57163806 A JP S57163806A JP 4983381 A JP4983381 A JP 4983381A JP 4983381 A JP4983381 A JP 4983381A JP S57163806 A JPS57163806 A JP S57163806A
Authority
JP
Japan
Prior art keywords
steel plate
arithmetic
external circumference
external
detecting
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.)
Granted
Application number
JP4983381A
Other languages
Japanese (ja)
Other versions
JPS6363042B2 (en
Inventor
Minoru Tanaka
Kazuo Takashima
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 JP4983381A priority Critical patent/JPS57163806A/en
Publication of JPS57163806A publication Critical patent/JPS57163806A/en
Publication of JPS6363042B2 publication Critical patent/JPS6363042B2/ja
Granted 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
    • G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures

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 eliminating disturbance in detecting the shape of a steel material by radiant light, by applying an external circumference tracking method by processing a data group showing radiation intensity by histogram arithmetic and spatial differential arithmetic. CONSTITUTION:Radiant light on the detection line 3a of a red-heated steel plate 1 is image formed through a lens 2 on a photoelectric element group 3, whose output is amplified and then quantized into bits by a quantizing device 5 to be stored in a memory 16. Although a blur due to reflection, scattering, etc., from a circumferential body appears at the external circumference 9c of the steel plate, this part is at low temperature, so a valley having a minimum frequency on a temperature histogram is regarded as a threshold level to eliminate a part 9'c in binary-coding process, thus eliminating the blur. Then, a data group is processed by spatial differential arithmetic 18 to emphasize only the external circumference edge of the steel plate because the external circumference edge part has a greater temperature difference than a scale 9a and a over-heated part 9b. External track arithmetic 19 is performed to find the maximum value of the differential value as a track, thus detecting the shape of the steel plate.
JP4983381A 1981-04-01 1981-04-01 Shape detector Granted JPS57163806A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4983381A JPS57163806A (en) 1981-04-01 1981-04-01 Shape detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4983381A JPS57163806A (en) 1981-04-01 1981-04-01 Shape detector

Publications (2)

Publication Number Publication Date
JPS57163806A true JPS57163806A (en) 1982-10-08
JPS6363042B2 JPS6363042B2 (en) 1988-12-06

Family

ID=12842077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4983381A Granted JPS57163806A (en) 1981-04-01 1981-04-01 Shape detector

Country Status (1)

Country Link
JP (1) JPS57163806A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4905149A (en) * 1987-08-20 1990-02-27 Fuji Photo Film Co., Ltd. Method of determining desired image signal range

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4905149A (en) * 1987-08-20 1990-02-27 Fuji Photo Film Co., Ltd. Method of determining desired image signal range

Also Published As

Publication number Publication date
JPS6363042B2 (en) 1988-12-06

Similar Documents

Publication Publication Date Title
JPS567041A (en) Road-surface moisture sensor
IE821637L (en) Radiation detection apparatus
JPS57102017A (en) Pattern detector
JPS5766345A (en) Inspection device for defect
JPS5794627A (en) Stress distribution measuring instrument
JPS57163806A (en) Shape detector
JPS55146015A (en) Non-contact measuring method for surface level and its measuring unit
JPS5759143A (en) Measuring method for grain size of granular material
JPS57163807A (en) Shape detector
JPS5465007A (en) Disc form recording carrier reader
Churnside et al. Probability density function measurements of optical scintillations in the atmosphere
JPS5530627A (en) Wire diameter meter
JPS55116286A (en) Radiant ray detector
JPS54119282A (en) Target detector
JPS5717805A (en) Inspection method of gear form
JPS5617481A (en) Optical reading method for braille
JPS54104329A (en) Out-of-focus detection method of picture image
JPS55528A (en) Focus detecting method
JPS53148399A (en) Radiant ray detector of semiconductor
JPS576308A (en) Discriminator for front and rear of work to be sheared
JPS57179611A (en) Configuration detecting device
JPS54121764A (en) Surface roughness evaluating apparatus
JPS54144180A (en) Exposure method of electron beam
JPS56116006A (en) Setting method for optical axis of light image
JPS55155271A (en) System for measuring quantity of radiation