JPS557665A - Thickness gauge of ultrasonic wave type - Google Patents

Thickness gauge of ultrasonic wave type

Info

Publication number
JPS557665A
JPS557665A JP8112878A JP8112878A JPS557665A JP S557665 A JPS557665 A JP S557665A JP 8112878 A JP8112878 A JP 8112878A JP 8112878 A JP8112878 A JP 8112878A JP S557665 A JPS557665 A JP S557665A
Authority
JP
Japan
Prior art keywords
range
measured object
values
ultrasonic wave
given
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
JP8112878A
Other languages
Japanese (ja)
Other versions
JPS5839288B2 (en
Inventor
Katsuhiko Shimada
Tetsuo Nakano
Yukio Yoshida
Yoshitaka Yoshiyama
Kazuyuki Ito
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.)
JFE Engineering Corp
Tokyo Keiki Inc
Original Assignee
Tokyo Keiki Co Ltd
NKK Corp
Nippon Kokan 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 Tokyo Keiki Co Ltd, NKK Corp, Nippon Kokan Ltd filed Critical Tokyo Keiki Co Ltd
Priority to JP8112878A priority Critical patent/JPS5839288B2/en
Publication of JPS557665A publication Critical patent/JPS557665A/en
Publication of JPS5839288B2 publication Critical patent/JPS5839288B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

PURPOSE: To measure the thickness without being affected by the unevenness on the surface of measured object, by measuring the time difference of the reflection waves from the surface and rear surface of measured object and obtaining the average value within a given range.
CONSTITUTION: Ultrasonic wave pulses are emitted on the measured object 6 with a given distance, the FF circuit 9 is set or reset with the reflection waves from the front and rear surfaces, and the pulses of the oscillator 11 passing through the period are counted 12 to obtain the time difference. This value is discriminated with the upper and lower limit discrimination circuit 19 whether it is within a given range or not. Only the values within the range are integrated 20 for a given number by m, the average value is calculated 15 and they are D/A converted 17 and outputted Z. In this case, if the values are at plus side from the range, they are all thrown away and when the data at minus side continue, they are directly converted 17 and outputted. Thus, peculiar data are thrown away to obtain the data closer to real values and the defect on the surface can also be detected.
COPYRIGHT: (C)1980,JPO&Japio
JP8112878A 1978-07-04 1978-07-04 Ultrasonic thickness gauge Expired JPS5839288B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8112878A JPS5839288B2 (en) 1978-07-04 1978-07-04 Ultrasonic thickness gauge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8112878A JPS5839288B2 (en) 1978-07-04 1978-07-04 Ultrasonic thickness gauge

Publications (2)

Publication Number Publication Date
JPS557665A true JPS557665A (en) 1980-01-19
JPS5839288B2 JPS5839288B2 (en) 1983-08-29

Family

ID=13737746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8112878A Expired JPS5839288B2 (en) 1978-07-04 1978-07-04 Ultrasonic thickness gauge

Country Status (1)

Country Link
JP (1) JPS5839288B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5710407A (en) * 1980-05-19 1982-01-20 Neratoom Device for measuring wall thickness
JPS609562A (en) * 1983-06-28 1985-01-18 Mitsubishi Electric Corp Device for measuring solidification thickness of billet
JPS6031010A (en) * 1983-07-29 1985-02-16 Nippon Steel Corp Apparatus for measuring thickness of solidified cast piece
JPS60191380A (en) * 1985-02-15 1985-09-28 株式会社日立製作所 Surface-back discriminator for paper money

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5710407A (en) * 1980-05-19 1982-01-20 Neratoom Device for measuring wall thickness
JPH0143881B2 (en) * 1980-05-19 1989-09-25 Nukon Eng Ando Kontorakuteingu Bv
JPS609562A (en) * 1983-06-28 1985-01-18 Mitsubishi Electric Corp Device for measuring solidification thickness of billet
JPH0464788B2 (en) * 1983-06-28 1992-10-16 Mitsubishi Electric Corp
JPS6031010A (en) * 1983-07-29 1985-02-16 Nippon Steel Corp Apparatus for measuring thickness of solidified cast piece
JPH0236163B2 (en) * 1983-07-29 1990-08-15 Shinnippon Seitetsu Kk
JPS60191380A (en) * 1985-02-15 1985-09-28 株式会社日立製作所 Surface-back discriminator for paper money

Also Published As

Publication number Publication date
JPS5839288B2 (en) 1983-08-29

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