JPS56651A - Ae monitor unit - Google Patents

Ae monitor unit

Info

Publication number
JPS56651A
JPS56651A JP7538679A JP7538679A JPS56651A JP S56651 A JPS56651 A JP S56651A JP 7538679 A JP7538679 A JP 7538679A JP 7538679 A JP7538679 A JP 7538679A JP S56651 A JPS56651 A JP S56651A
Authority
JP
Japan
Prior art keywords
sensor
detection
sensors
circuit
monitor
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
JP7538679A
Other languages
Japanese (ja)
Inventor
Hirokazu Sato
Yasuo Shinomiya
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP7538679A priority Critical patent/JPS56651A/en
Publication of JPS56651A publication Critical patent/JPS56651A/en
Pending legal-status Critical Current

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To make it possible to change arbitrarily a monitor section without change of the arrangement interval of sensors, by delaying one of detection outputs of two sets of acoustic emission (AE) sensors by a prescribed time and by deciding the phase difference between this output and the other by comparison.
CONSTITUTION: The phase difference between the receiving detection output of AE sensor 11b and the receiving detection output of AE sensor 11a which is delayed in delay circuit 13 of phase deciding part 15 by prescribed time T1 is decided by deciding circuit 14, and circuit 14 generates a decision pulse only when the phase of the delayed detection output advances, and generation position P of the AE wave signal is detected by signal processing circuit 16 to monitor the AE wave signal. Consequently, only when distance D1 from sensor 11a to detection point P is shorter than distance D1 from sensor 11b, the position of detection point P is detected, and the monitor region is limited to prevent the influence of noise and so on. In this case, detection points different in distances D1 and D2 can be determined on the basis of expressions I and II by changing time T1, and the monitor section can be changed arbitrarily without change of the arrangement position of sensors. Here, V is the AE wave propagation speed, and L is the delay equivalent distance.
COPYRIGHT: (C)1981,JPO&Japio
JP7538679A 1979-06-15 1979-06-15 Ae monitor unit Pending JPS56651A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7538679A JPS56651A (en) 1979-06-15 1979-06-15 Ae monitor unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7538679A JPS56651A (en) 1979-06-15 1979-06-15 Ae monitor unit

Publications (1)

Publication Number Publication Date
JPS56651A true JPS56651A (en) 1981-01-07

Family

ID=13574697

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7538679A Pending JPS56651A (en) 1979-06-15 1979-06-15 Ae monitor unit

Country Status (1)

Country Link
JP (1) JPS56651A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011251737A (en) * 2010-06-02 2011-12-15 Yoshimasa Tamai Arbitrary proportion discharging container
CN105606709A (en) * 2014-11-18 2016-05-25 株式会社东芝 Signal processing apparatus, server, detection system, and signal processing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011251737A (en) * 2010-06-02 2011-12-15 Yoshimasa Tamai Arbitrary proportion discharging container
CN105606709A (en) * 2014-11-18 2016-05-25 株式会社东芝 Signal processing apparatus, server, detection system, and signal processing method

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