JPS5742838A - Microhardness meter - Google Patents

Microhardness meter

Info

Publication number
JPS5742838A
JPS5742838A JP11818180A JP11818180A JPS5742838A JP S5742838 A JPS5742838 A JP S5742838A JP 11818180 A JP11818180 A JP 11818180A JP 11818180 A JP11818180 A JP 11818180A JP S5742838 A JPS5742838 A JP S5742838A
Authority
JP
Japan
Prior art keywords
impression
signal
output
irregularity
center
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
JP11818180A
Other languages
Japanese (ja)
Other versions
JPS6338657B2 (en
Inventor
Toshihiko Fukuhara
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.)
Komatsu Ltd
Original Assignee
Komatsu 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 Komatsu Ltd filed Critical Komatsu Ltd
Priority to JP11818180A priority Critical patent/JPS5742838A/en
Publication of JPS5742838A publication Critical patent/JPS5742838A/en
Publication of JPS6338657B2 publication Critical patent/JPS6338657B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/40—Investigating hardness or rebound hardness
    • G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid

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)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

PURPOSE:To reduce a measurement error extremely and to lessen the fatigue of eyes by electrically measuring the length of the diagonal of an impression, and by calculating and printing out Vickers hardness. CONSTITUTION:A telecamera 11 is connected to a hardness meter 10 and, while scanning an impression 1 formed by the diamond impressing element of the hardness meter 10, to example, as shown by an arrow F, takes its image to output a video signal ev to the shading correcting circuit 13 of a picture processing part 12. This correcting circuit 13 corrects the irregularity of the video signal ev due to the irregularity of the sensitivity of an image pickup tube to output a signal ev', which is applied to a signal processing circuit 14. This processing circuit 14 differentates the input signal ev' to detect a boundary between the impression 1 and another part 1', and perform binary coding by using a prescribed threshold level to output a binary-coded signal eb to a storate device 15. The center 0 of the impression 1 is conformed with the center P of cross memories 15a and 15b to store the respective edges of the impression 1, and the size of impression 1 is measured to calculate its Vickers hardness.
JP11818180A 1980-08-27 1980-08-27 Microhardness meter Granted JPS5742838A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11818180A JPS5742838A (en) 1980-08-27 1980-08-27 Microhardness meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11818180A JPS5742838A (en) 1980-08-27 1980-08-27 Microhardness meter

Publications (2)

Publication Number Publication Date
JPS5742838A true JPS5742838A (en) 1982-03-10
JPS6338657B2 JPS6338657B2 (en) 1988-08-01

Family

ID=14730138

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11818180A Granted JPS5742838A (en) 1980-08-27 1980-08-27 Microhardness meter

Country Status (1)

Country Link
JP (1) JPS5742838A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992015006A1 (en) * 1991-02-19 1992-09-03 Newage Industries Inc. Centering device for use with brinell hardness-measuring probe
JPH04122963U (en) * 1991-04-03 1992-11-05 カルソニツク株式会社 Heat exchanger
JPH07218410A (en) * 1994-01-31 1995-08-18 Shimadzu Corp Pressing type hardness measurement device
CN102967516A (en) * 2011-08-31 2013-03-13 株式会社三丰 Hardness tester
DE102014001278B4 (en) * 2013-03-13 2018-11-08 Leco Corp. Impression hardness test system with self-learning shading corrector

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992015006A1 (en) * 1991-02-19 1992-09-03 Newage Industries Inc. Centering device for use with brinell hardness-measuring probe
US5150608A (en) * 1991-02-19 1992-09-29 Giancarlo Mazzoleni Centering device for use with brinell hardness-measuring probe
US5483821A (en) * 1991-02-19 1996-01-16 Newage Industries Brinell hardness-measuring probe with centering device
JPH04122963U (en) * 1991-04-03 1992-11-05 カルソニツク株式会社 Heat exchanger
JPH07218410A (en) * 1994-01-31 1995-08-18 Shimadzu Corp Pressing type hardness measurement device
CN102967516A (en) * 2011-08-31 2013-03-13 株式会社三丰 Hardness tester
JP2013050379A (en) * 2011-08-31 2013-03-14 Mitsutoyo Corp Hardness-testing machine
DE102014001278B4 (en) * 2013-03-13 2018-11-08 Leco Corp. Impression hardness test system with self-learning shading corrector

Also Published As

Publication number Publication date
JPS6338657B2 (en) 1988-08-01

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