JPS568544A - Method and device for detection of bubble in liquid - Google Patents

Method and device for detection of bubble in liquid

Info

Publication number
JPS568544A
JPS568544A JP8360779A JP8360779A JPS568544A JP S568544 A JPS568544 A JP S568544A JP 8360779 A JP8360779 A JP 8360779A JP 8360779 A JP8360779 A JP 8360779A JP S568544 A JPS568544 A JP S568544A
Authority
JP
Japan
Prior art keywords
change
conduit
sound field
bubbles
bubble
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
JP8360779A
Other languages
Japanese (ja)
Inventor
Hiroshi Watanabe
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP8360779A priority Critical patent/JPS568544A/en
Publication of JPS568544A publication Critical patent/JPS568544A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To realize a high-accuracy detection for the bubbles in the conduit regardless of the bubbles's position, by extracting the change of the acoustic impedance caused by the bubble passing within the sound field in the form of the change of the electric impedance.
CONSTITUTION: The breathing vibration is given to the liquid flowing in conduit 1 by ultrasonic oscillator 2, and thus the sound field which becomes uniform in any direction on the cross section of conduit 1 is formed. In case some bubbles are contained into the liquid in conduit 1, the acoustic impedance changes within the sound field. Accordingly, the electric impedance of oscillator 2 itself changes, and this change component is detected. As the sound field is uniform, no fluctuation is caused to the detecting accuracy although the bubble's passing position may vary. As a result, this change is given to impedance measuring circuit 4 formed with the bridge of oscillator 2 used for one side, and the output of circuit 4 is made to pass through amplifier 5. And only the change component is extracted through detecting circuit 6 and then recorded by recorder 8 and via amplifier 7.
COPYRIGHT: (C)1981,JPO&Japio
JP8360779A 1979-07-02 1979-07-02 Method and device for detection of bubble in liquid Pending JPS568544A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8360779A JPS568544A (en) 1979-07-02 1979-07-02 Method and device for detection of bubble in liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8360779A JPS568544A (en) 1979-07-02 1979-07-02 Method and device for detection of bubble in liquid

Publications (1)

Publication Number Publication Date
JPS568544A true JPS568544A (en) 1981-01-28

Family

ID=13807163

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8360779A Pending JPS568544A (en) 1979-07-02 1979-07-02 Method and device for detection of bubble in liquid

Country Status (1)

Country Link
JP (1) JPS568544A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672639A (en) * 1984-05-24 1987-06-09 Kabushiki Kaisha Toshiba Sampling clock pulse generator
JPH04186155A (en) * 1990-11-21 1992-07-02 Nippon Kotsukusu Kk Device for sensing foreign matter in liquid
GB2493366B (en) * 2011-08-02 2017-05-03 Naxys As Underwater detection apparatus

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4960596A (en) * 1972-08-17 1974-06-12

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4960596A (en) * 1972-08-17 1974-06-12

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4672639A (en) * 1984-05-24 1987-06-09 Kabushiki Kaisha Toshiba Sampling clock pulse generator
JPH04186155A (en) * 1990-11-21 1992-07-02 Nippon Kotsukusu Kk Device for sensing foreign matter in liquid
GB2493366B (en) * 2011-08-02 2017-05-03 Naxys As Underwater detection apparatus

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