JPH02179472A - Ultrasonic wave seam detector - Google Patents

Ultrasonic wave seam detector

Info

Publication number
JPH02179472A
JPH02179472A JP63335599A JP33559988A JPH02179472A JP H02179472 A JPH02179472 A JP H02179472A JP 63335599 A JP63335599 A JP 63335599A JP 33559988 A JP33559988 A JP 33559988A JP H02179472 A JPH02179472 A JP H02179472A
Authority
JP
Japan
Prior art keywords
detected
wave
seam
value
ultrasonic wave
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
JP63335599A
Other languages
Japanese (ja)
Inventor
Hironobu Yoshikawa
Toshiyuki Kasahara
Original Assignee
Nireco 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 Nireco Corp filed Critical Nireco Corp
Priority to JP63335599A priority Critical patent/JPH02179472A/en
Publication of JPH02179472A publication Critical patent/JPH02179472A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to detect a seam part regardless of the color, the presence or absence of a picture pattern and the quality of a material to be detected by detecting the fact that the transmitting amount of ultrasonic wave at the seam part of the material to be detected is decreased in comparison with the normal part in no contact with the material to be measured.
CONSTITUTION: A squared wave A from an oscillating circuit 1 is amplified 2, and a square wave B is obtained. An ultrasonic wave is emitted from an ultrasonic transmitter 3 based on the square wave B. The most of the wave is reflected from the surface of a material to be detected 4, and the remaining part is transmitted through the material. A part of it is received with an ultrasonic wave receiver 5, and the other is reflected. The transmitted amount which is received with the receiver 5 is slightly reduced at a thick seam part than at a normal part. Then, the output of the receiver 5 is detected with a preamplifier 6, a detector circuit 7 and a low-pass filter circuit 8 in a detector part. A reference value is generated in a sensitivity adjuster 10 based on a peak value which is held with a peak hold circuit 9 in a discriminating part. The values are compared in a comparator circuit 11. Whether the detected value is larger or smaller than the reference value is discriminated, and the seam part is detected.
COPYRIGHT: (C)1990,JPO&Japio
JP63335599A 1988-12-29 1988-12-29 Ultrasonic wave seam detector Pending JPH02179472A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63335599A JPH02179472A (en) 1988-12-29 1988-12-29 Ultrasonic wave seam detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63335599A JPH02179472A (en) 1988-12-29 1988-12-29 Ultrasonic wave seam detector

Publications (1)

Publication Number Publication Date
JPH02179472A true JPH02179472A (en) 1990-07-12

Family

ID=18290385

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63335599A Pending JPH02179472A (en) 1988-12-29 1988-12-29 Ultrasonic wave seam detector

Country Status (1)

Country Link
JP (1) JPH02179472A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0337589A (en) * 1989-07-04 1991-02-18 Hodaka Denshi Gijutsu Kenkyusho:Kk Detector for seam, hole or the like in cloth seam or the like hole in cloth
JPH04114838A (en) * 1990-08-31 1992-04-15 Osaka Sealing Insatsu Kk Label paster
WO2009057608A1 (en) * 2007-11-02 2009-05-07 Mitsubishi Heavy Industries, Ltd. Corrugator, and its splicing portion detecting method and device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103080A (en) * 1981-10-30 1982-06-26 Canon Inc Object detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103080A (en) * 1981-10-30 1982-06-26 Canon Inc Object detector

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0337589A (en) * 1989-07-04 1991-02-18 Hodaka Denshi Gijutsu Kenkyusho:Kk Detector for seam, hole or the like in cloth seam or the like hole in cloth
JPH04114838A (en) * 1990-08-31 1992-04-15 Osaka Sealing Insatsu Kk Label paster
JP2525749B2 (en) * 1990-08-31 1996-08-21 大阪シーリング印刷株式会社 Label sticking device
WO2009057608A1 (en) * 2007-11-02 2009-05-07 Mitsubishi Heavy Industries, Ltd. Corrugator, and its splicing portion detecting method and device

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