GB1121523A - Electroacoustic transducer - Google Patents

Electroacoustic transducer

Info

Publication number
GB1121523A
GB1121523A GB1218065A GB1218065A GB1121523A GB 1121523 A GB1121523 A GB 1121523A GB 1218065 A GB1218065 A GB 1218065A GB 1218065 A GB1218065 A GB 1218065A GB 1121523 A GB1121523 A GB 1121523A
Authority
GB
United Kingdom
Prior art keywords
contact layer
ultrasonic
transducer
thickness
materials
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.)
Expired
Application number
GB1218065A
Inventor
Lev Grigorievich Merkulov
Lev Maximovich Jablonik
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.)
LE VNII ELEKTROMEKHANIKI
Original Assignee
LE VNII ELEKTROMEKHANIKI
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 LE VNII ELEKTROMEKHANIKI filed Critical LE VNII ELEKTROMEKHANIKI
Priority to GB1218065A priority Critical patent/GB1121523A/en
Publication of GB1121523A publication Critical patent/GB1121523A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/24—Probes
    • G01N29/2437—Piezoelectric probes
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/02—Mechanical acoustic impedances; Impedance matching, e.g. by horns; Acoustic resonators

Abstract

1,121,523. Ultrasonic probes. LENINGRADSKY FILIAL VSESOJUZNOGO NAUCHNO - ISSLEDOVATELSKOGO INSTITUTA ELEKTROMEKHANIKI. 23 July, 1965, No. 12180/65. Heading H4J. An ultrasonic probe comprises a damping cover block 1, an active element 2 (e.g. a piezoelectric or magnetostrictive element) and, optionally, one or more intermediate layers 3, 4. Ultrasonic vibrations are sent by element 2 into, or received from, a medium 6 to be tested through a liquid contact layer 5. The thickness and material of the element 2 and the materials of the block 1 and of the contact layer 5 (and the thickness and materials of the intermediate layers 3, 4, if present) are such that the coefficient of reflection at the boundary between the element 2 (or, if present the outer surface of the lower layer 4) and the contact layer 5 is substantially zero. Multiple reflections in the contact layer 5 are substantially eliminated and in consequence the sensitivity of the transducer is substantially independent of the finish of the test surface. With an element 2 having a high electromechanical coupling coefficient, e.g. barium titanate, the parameters of the associated electrical circuitry are taken into account. This is unnecessary with material, e.g. quartz, having a low electromechanical coupling coefficient, not greater than about 0.001. Layers 3 and 4 may be of epoxy resin and steel respectively. The members 1 to 5 are held in a metal casing.(7), Fig. 2 (not shown), furnished with a lead (8) for connecting the element 2 to a circuit supplied from a high frequency generator, or to a circuit for extracting electrical signals from the transducer when it receives back ultrasonic waves.
GB1218065A 1965-07-23 1965-07-23 Electroacoustic transducer Expired GB1121523A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1218065A GB1121523A (en) 1965-07-23 1965-07-23 Electroacoustic transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1218065A GB1121523A (en) 1965-07-23 1965-07-23 Electroacoustic transducer

Publications (1)

Publication Number Publication Date
GB1121523A true GB1121523A (en) 1968-07-31

Family

ID=9999806

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1218065A Expired GB1121523A (en) 1965-07-23 1965-07-23 Electroacoustic transducer

Country Status (1)

Country Link
GB (1) GB1121523A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102204A (en) * 1975-12-23 1978-07-25 Carl Kretz Ultrasonic section plane examination and display
US4918990A (en) * 1987-02-26 1990-04-24 Panametrics, Inc. Ultrasonic transducer assembly
EP0366161A2 (en) * 1982-12-30 1990-05-02 Fujitsu Limited Electro-sound transducer, and a probe unit or ultrasonic diagnostic apparatus using such a transducer
GB2298277A (en) * 1995-02-23 1996-08-28 Defelsko Corp Delay line for an ultrasonic probe with an interface allowing inbuilt calibration
DE102015206225A1 (en) * 2015-04-08 2016-10-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. DEVICE, METHOD AND SYSTEM FOR CHECKING AN EMERGENCY CONVERTER

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102204A (en) * 1975-12-23 1978-07-25 Carl Kretz Ultrasonic section plane examination and display
EP0366161A2 (en) * 1982-12-30 1990-05-02 Fujitsu Limited Electro-sound transducer, and a probe unit or ultrasonic diagnostic apparatus using such a transducer
EP0366161A3 (en) * 1982-12-30 1990-07-11 Fujitsu Limited Electro-sound transducer, and a probe unit or ultrasonic diagnostic apparatus using such a transducer
US4918990A (en) * 1987-02-26 1990-04-24 Panametrics, Inc. Ultrasonic transducer assembly
GB2298277A (en) * 1995-02-23 1996-08-28 Defelsko Corp Delay line for an ultrasonic probe with an interface allowing inbuilt calibration
US5777230A (en) * 1995-02-23 1998-07-07 Defelsko Corporation Delay line for an ultrasonic probe and method of using same
GB2298277B (en) * 1995-02-23 1999-04-07 Defelsko Corp Delay line for an ultrasonic probe, probe incorporating it, and method of using same
US5979241A (en) * 1995-02-23 1999-11-09 Defelsko Corporation Delay line for an ultrasonic probe and method of using same
US6122968A (en) * 1995-02-23 2000-09-26 Defelsko Corporation Delay line for an ultrasonic probe and method of using same
DE102015206225A1 (en) * 2015-04-08 2016-10-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. DEVICE, METHOD AND SYSTEM FOR CHECKING AN EMERGENCY CONVERTER
DE102015206225B4 (en) 2015-04-08 2023-05-17 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. DEVICE, METHOD AND SYSTEM FOR TESTING AN TRANSDUCER

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