JPS5558471A - Control system of ultrasonic-wave beam - Google Patents
Control system of ultrasonic-wave beamInfo
- Publication number
- JPS5558471A JPS5558471A JP13105078A JP13105078A JPS5558471A JP S5558471 A JPS5558471 A JP S5558471A JP 13105078 A JP13105078 A JP 13105078A JP 13105078 A JP13105078 A JP 13105078A JP S5558471 A JPS5558471 A JP S5558471A
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic
- trembler
- point
- wave beam
- width
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- 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 obtain an ultrasonic-wave beam with narrow width, by actualizing actual arc phasing by providing with time delay or phase delay corresponding to the distance of distances from each trembler up to an arbitray point of a short distance field region. CONSTITUTION:Trembler groups 3-1,...,3-N are circularly arranged. When adding time delay corresponding to distances e1, e2, e4, e5 from each trembler up to a circular arc in the case when drawing a circular are AB from a point P at r2 distance from the trembler 3-3, ultrasonic waves are focussed at the point P, and the width of an ultrasonic-wave beam in a line S containing the point P becomes narrow as shown in width a.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13105078A JPS5558471A (en) | 1978-10-26 | 1978-10-26 | Control system of ultrasonic-wave beam |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13105078A JPS5558471A (en) | 1978-10-26 | 1978-10-26 | Control system of ultrasonic-wave beam |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5558471A true JPS5558471A (en) | 1980-05-01 |
Family
ID=15048833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13105078A Pending JPS5558471A (en) | 1978-10-26 | 1978-10-26 | Control system of ultrasonic-wave beam |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5558471A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02141686A (en) * | 1988-11-22 | 1990-05-31 | Nec Corp | Apparatus for suppressing side lobe of cylindrical ultrasonic wave transducer |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS508557A (en) * | 1973-05-21 | 1975-01-29 |
-
1978
- 1978-10-26 JP JP13105078A patent/JPS5558471A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS508557A (en) * | 1973-05-21 | 1975-01-29 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02141686A (en) * | 1988-11-22 | 1990-05-31 | Nec Corp | Apparatus for suppressing side lobe of cylindrical ultrasonic wave transducer |
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