JPS5482262A - Electro-acoustic transducer for bearing measurement - Google Patents

Electro-acoustic transducer for bearing measurement

Info

Publication number
JPS5482262A
JPS5482262A JP15023277A JP15023277A JPS5482262A JP S5482262 A JPS5482262 A JP S5482262A JP 15023277 A JP15023277 A JP 15023277A JP 15023277 A JP15023277 A JP 15023277A JP S5482262 A JPS5482262 A JP S5482262A
Authority
JP
Japan
Prior art keywords
type
electro
pressure gradient
bearing
output terminal
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
JP15023277A
Other languages
Japanese (ja)
Other versions
JPS6118703B2 (en
Inventor
Akira Kameyama
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15023277A priority Critical patent/JPS5482262A/en
Publication of JPS5482262A publication Critical patent/JPS5482262A/en
Publication of JPS6118703B2 publication Critical patent/JPS6118703B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/80—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using ultrasonic, sonic or infrasonic waves
    • G01S3/802—Systems for determining direction or deviation from predetermined direction

Abstract

PURPOSE:To remove disturbing sound waves other than the target bearing by using two kinds of pressure gradient type transducers. CONSTITUTION:A dynamic type vibrator 1 as a pressure gradient type transducer which electromagnetically performs electro-mechanical conversion and electrostrictive type bimorph vibrators 2a, 2b as pressure gradient type transducers which electrostatically perform electro-mechanical conversion are contained together with a medium of good sound wave transmittivity in a case of good sound wave transmittivity.Then the electric signal of the dynamic type vibrator 1 from output terminal 4a is removed of disturbing sound waves other than the target bearing as the electric signal being the difference of the two electrostrictive type bimorph vibrators 2a, 2b are outputted from output terminal 5a and at the same time the phase comparison for the purpose of bearing determination without phase shifter is made possible.
JP15023277A 1977-12-13 1977-12-13 Electro-acoustic transducer for bearing measurement Granted JPS5482262A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15023277A JPS5482262A (en) 1977-12-13 1977-12-13 Electro-acoustic transducer for bearing measurement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15023277A JPS5482262A (en) 1977-12-13 1977-12-13 Electro-acoustic transducer for bearing measurement

Publications (2)

Publication Number Publication Date
JPS5482262A true JPS5482262A (en) 1979-06-30
JPS6118703B2 JPS6118703B2 (en) 1986-05-14

Family

ID=15492429

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15023277A Granted JPS5482262A (en) 1977-12-13 1977-12-13 Electro-acoustic transducer for bearing measurement

Country Status (1)

Country Link
JP (1) JPS5482262A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003333680A (en) * 2002-05-10 2003-11-21 Kenwood Corp Microphone unit and sound source direction judging apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003333680A (en) * 2002-05-10 2003-11-21 Kenwood Corp Microphone unit and sound source direction judging apparatus

Also Published As

Publication number Publication date
JPS6118703B2 (en) 1986-05-14

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