JPS5478688A - Ultrasonic converting method - Google Patents

Ultrasonic converting method

Info

Publication number
JPS5478688A
JPS5478688A JP14563777A JP14563777A JPS5478688A JP S5478688 A JPS5478688 A JP S5478688A JP 14563777 A JP14563777 A JP 14563777A JP 14563777 A JP14563777 A JP 14563777A JP S5478688 A JPS5478688 A JP S5478688A
Authority
JP
Japan
Prior art keywords
electrode
focus
ultrasonic
fixed conditions
axial
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
JP14563777A
Other languages
Japanese (ja)
Other versions
JPS5821993B2 (en
Inventor
Koji Toda
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.)
TDK Corp
Original Assignee
TDK 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 TDK Corp filed Critical TDK Corp
Priority to JP52145637A priority Critical patent/JPS5821993B2/en
Priority to DE19782850251 priority patent/DE2850251C2/en
Publication of JPS5478688A publication Critical patent/JPS5478688A/en
Priority to US06/215,902 priority patent/US4399387A/en
Publication of JPS5821993B2 publication Critical patent/JPS5821993B2/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G10K11/18—Methods or devices for transmitting, conducting or directing sound
    • G10K11/26—Sound-focusing or directing, e.g. scanning
    • G10K11/34—Sound-focusing or directing, e.g. scanning using electrical steering of transducer arrays, e.g. beam steering
    • G10K11/341—Circuits therefor
    • G10K11/346—Circuits therefor using phase variation

Abstract

PURPOSE:To make it possible to focus beams on one point by an ultrasonic oscillator with blind-shaped electrodes by making electrode intervals and the phase difference of an applied signal satisfy the fixed conditions. CONSTITUTION:On the surface of a piezoelectric substance, blind-shaped electrodes 4a to 4i are arranged in the longish direction of electrode fingers, and every n-th electrode is connected in common, so that a n-phase electrode can be constituted. Now, setting electrode intervals under fixed conditions enables ultrasonic beams to focus in one direction (X-axial direction). On the other hand, when electrodes 4a to 4i are applied with signals which are equal in fequency and out of phase satisfying the fixed conditions, ultrasonic beams focus in the Y-axial direction. They therefore focus on point F through combinational focusing in both X-axial and Y- axial directions. In addition, a plural number of different electrode groups are provided onto the surface of a single piezoelectric substance and applied signals are changed over to make it possible to obtain an ultra sonic wave which is able to vary its focal length. On the contrary, it is possible to detect an ultrasonic wave and convert it into electric energy.
JP52145637A 1977-11-21 1977-12-06 Ultrasonic conversion method Expired JPS5821993B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP52145637A JPS5821993B2 (en) 1977-12-06 1977-12-06 Ultrasonic conversion method
DE19782850251 DE2850251C2 (en) 1977-11-21 1978-11-20 Ultrasonic wave transducer and method for generating a converging ultrasonic wave beam
US06/215,902 US4399387A (en) 1977-11-21 1980-12-12 Ultrasonic wave transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52145637A JPS5821993B2 (en) 1977-12-06 1977-12-06 Ultrasonic conversion method

Publications (2)

Publication Number Publication Date
JPS5478688A true JPS5478688A (en) 1979-06-22
JPS5821993B2 JPS5821993B2 (en) 1983-05-06

Family

ID=15389607

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52145637A Expired JPS5821993B2 (en) 1977-11-21 1977-12-06 Ultrasonic conversion method

Country Status (1)

Country Link
JP (1) JPS5821993B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01155126A (en) * 1987-12-11 1989-06-19 Matsushita Electric Ind Co Ltd Electric cooking heater
JPH02293538A (en) * 1989-05-08 1990-12-04 Matsushita Electric Ind Co Ltd Electric hotplate

Also Published As

Publication number Publication date
JPS5821993B2 (en) 1983-05-06

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