JPS57111437A - Inspector for surface flaw - Google Patents

Inspector for surface flaw

Info

Publication number
JPS57111437A
JPS57111437A JP18784980A JP18784980A JPS57111437A JP S57111437 A JPS57111437 A JP S57111437A JP 18784980 A JP18784980 A JP 18784980A JP 18784980 A JP18784980 A JP 18784980A JP S57111437 A JPS57111437 A JP S57111437A
Authority
JP
Japan
Prior art keywords
slab
temperature
heater
flaw
light volume
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
JP18784980A
Other languages
Japanese (ja)
Inventor
Atsushi Tanaka
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP18784980A priority Critical patent/JPS57111437A/en
Publication of JPS57111437A publication Critical patent/JPS57111437A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/72—Investigating presence of flaws

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

PURPOSE:To increase the flaw detecting performance, by having a means to heat the surface of a slab, a scan and pickup means to pick up successively the slab surface, etc. and detecting the temperature and the light volume at plural shifting positions to discriminate the surface flaw of the slab from the difference of the variances of the temperature and the light volume. CONSTITUTION:A surface heater 7 consists of a burner heater or an inductive heater to heat the surface 1a of a slab 1. The heated surface 1a receives a linear scan at a position 2a of a sensor by an infrared scanner 2 to obtain the video signal. The surface 1a is furthermore shifted and receives again a linear scan at the sensor position 2a and by the scanner 2 to obtain the video signal. In such a way, the temperature or the light volume is detected at plural shifting positions. Thus the surface flaws are discriminated from the difference of the variances of these temperature and light volumes. In such way, the flaw detecting performance can be increased compared with a conventional inspector.
JP18784980A 1980-12-29 1980-12-29 Inspector for surface flaw Pending JPS57111437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18784980A JPS57111437A (en) 1980-12-29 1980-12-29 Inspector for surface flaw

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18784980A JPS57111437A (en) 1980-12-29 1980-12-29 Inspector for surface flaw

Publications (1)

Publication Number Publication Date
JPS57111437A true JPS57111437A (en) 1982-07-10

Family

ID=16213288

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18784980A Pending JPS57111437A (en) 1980-12-29 1980-12-29 Inspector for surface flaw

Country Status (1)

Country Link
JP (1) JPS57111437A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62116237A (en) * 1985-11-15 1987-05-27 Mitsubishi Electric Corp Detector for surface flaw
JP2008216159A (en) * 2007-03-07 2008-09-18 Kyushu Nogeden:Kk Detecting method of defective part of moving article, image processing program, and data processor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62116237A (en) * 1985-11-15 1987-05-27 Mitsubishi Electric Corp Detector for surface flaw
JP2008216159A (en) * 2007-03-07 2008-09-18 Kyushu Nogeden:Kk Detecting method of defective part of moving article, image processing program, and data processor

Similar Documents

Publication Publication Date Title
SE8000240L (en) Surface Inspection System for Thermal Radiant Material
RU97118670A (en) Fingerprint Sensor
ATE122197T1 (en) DEVICE FOR DETECTING A COOKING VESSEL PLACED IN A HEATING ZONE OF A COOKING OR WARMING APPLIANCE.
FI56451C (en) FOERFARANDE OCH ANORDNING FOER MAETNING AV TRAEVIRKE
CZ251498A3 (en) Method of determining mean radiation of a fuel layer
JPS6416067A (en) Original detector
NO890106L (en) PROCEDURE FOR THE DETECTION OF SURFACE CRACKS IN METAL TOPICS.
DE69019647D1 (en) OPTICAL PROBE FOR DETECTING LIGHT TRANSFERRING PROPERTIES.
JPS57111437A (en) Inspector for surface flaw
US3597084A (en) Delta t-bar spectrometer readout device
GB2007358A (en) Method of flaw detection in metal members
JPS5676004A (en) Measuring device of flatness
KR910018730A (en) Control equipment
JPS5658645A (en) Flaw detecting device
JPS5760362A (en) Toner image fixing device
JPS5723014A (en) Detection of profile and temperature of materials inserted in blast furnace
JPS57184956A (en) Inspecting device of surface defect
JPS5746108A (en) Inspection of surface shape for steel material
JPS5777946A (en) Discriminating method for road surface condition
JPS55119047A (en) Signal processing system
JPS5614140A (en) Detecting method for road-surface condition
SU453564A1 (en) METHOD OF MEASURING THE THICKNESS OF A LAYER OF A SEMI-TRANSPARENT MATERIAL
SU1372223A1 (en) Dew point hygrometer
Okamoto et al. Surface Crack Detection by Infrared Radiometer. III. Detection Limit and Its Related Parameters
SU602842A1 (en) Method of thermal flaw detection