JPS6439510A - Thickness measuring method - Google Patents

Thickness measuring method

Info

Publication number
JPS6439510A
JPS6439510A JP19527887A JP19527887A JPS6439510A JP S6439510 A JPS6439510 A JP S6439510A JP 19527887 A JP19527887 A JP 19527887A JP 19527887 A JP19527887 A JP 19527887A JP S6439510 A JPS6439510 A JP S6439510A
Authority
JP
Japan
Prior art keywords
speed
wave
time
longitudinal wave
vibrator
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
JP19527887A
Other languages
Japanese (ja)
Inventor
Giichi Hamazaki
Yoshiaki Suzuki
Yukio Ogura
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 Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co 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 Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Priority to JP19527887A priority Critical patent/JPS6439510A/en
Publication of JPS6439510A publication Critical patent/JPS6439510A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:To detect the thickness of even a body whose material is unknown by measuring the speed of a surface wave and operating the speed of a longitudinal wave, and sending and receiving the longitudinal wave and measuring its required time. CONSTITUTION:When a probe 3 equipped with vibrators 1 and 2 at a specific equal angle is made to abut on the surface of the body 4 to be measured and an ultrasonic measuring instrument 5 applies a high frequency electric signal to the vibrator 1, ultrasonic wave pulses are generated to propagate the surface wave to the body 4, and the vibrator 2 receives it. Then, the speed Cs of the surface wave is found from the time t1 between the transmission and reception and the interval between the vibrators. Here, it is evident that the speed Cs is 0.45 time the speed Cd of the longitudinal wave whatever material the ultrasonic wave is propagated in, so the speed Cd is operated. For the purpose, a probe 7 which has a vibrator 6 for transmitting and receiving the longitudinal wave is made to abut on the surface of the body 4 and the time t1 required by the reciprocation of the longitudinal wave is measured to calculate the thickness of the body 4 from the speed Cd and time t4.
JP19527887A 1987-08-06 1987-08-06 Thickness measuring method Pending JPS6439510A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19527887A JPS6439510A (en) 1987-08-06 1987-08-06 Thickness measuring method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19527887A JPS6439510A (en) 1987-08-06 1987-08-06 Thickness measuring method

Publications (1)

Publication Number Publication Date
JPS6439510A true JPS6439510A (en) 1989-02-09

Family

ID=16338501

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19527887A Pending JPS6439510A (en) 1987-08-06 1987-08-06 Thickness measuring method

Country Status (1)

Country Link
JP (1) JPS6439510A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103308012A (en) * 2013-06-24 2013-09-18 广东惠利普路桥信息工程有限公司 Concrete pavement thickness detection system and detection method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5567605A (en) * 1978-11-17 1980-05-21 Hitachi Ltd Thickness measuring method by ultrasonic wave
JPS58184507A (en) * 1982-04-23 1983-10-28 Hitachi Ltd Device for measuring thickness of surface layer
JPS6122208A (en) * 1984-07-11 1986-01-30 Nippon Steel Corp Simultaneous measurement of body dimension and sound velocity

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5567605A (en) * 1978-11-17 1980-05-21 Hitachi Ltd Thickness measuring method by ultrasonic wave
JPS58184507A (en) * 1982-04-23 1983-10-28 Hitachi Ltd Device for measuring thickness of surface layer
JPS6122208A (en) * 1984-07-11 1986-01-30 Nippon Steel Corp Simultaneous measurement of body dimension and sound velocity

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103308012A (en) * 2013-06-24 2013-09-18 广东惠利普路桥信息工程有限公司 Concrete pavement thickness detection system and detection method

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