[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

JPS57208482A - Ultrasonic pulse switch - Google Patents

Ultrasonic pulse switch

Info

Publication number
JPS57208482A
JPS57208482A JP9489881A JP9489881A JPS57208482A JP S57208482 A JPS57208482 A JP S57208482A JP 9489881 A JP9489881 A JP 9489881A JP 9489881 A JP9489881 A JP 9489881A JP S57208482 A JPS57208482 A JP S57208482A
Authority
JP
Japan
Prior art keywords
frequency
oscillating circuit
vibrator
changing
permits
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
JP9489881A
Other languages
Japanese (ja)
Inventor
Susumu Katayama
Hironobu Inoue
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP9489881A priority Critical patent/JPS57208482A/en
Publication of JPS57208482A publication Critical patent/JPS57208482A/en
Pending 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
    • G10K11/343—Circuits therefor using frequency variation or different frequencies

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE:To change directivity solely by changing a frequency of an oscillating circuit and to enable substantial changing of a detecting area, by a method wherein a wide-band vibrator is employed by an ultrasonic generating means, and an oscillating circuit for driving the vibrator is constituted in the manner such that a frequency thereof is caused to change. CONSTITUTION:A transmitting vibrator 5 and a receiving vibrator 6 employ, for example, a transducer as a wide-band vibrator, and an oscillating circuit 3 is constituted such that a frequency can be changed arbitrarily. The oscillating circuit 3 forms a C-R oscillating circuit which uses two inverters G1 and G2, and a frequency is changed by a variable resistor VR1. Additionally, in an electrostatic transducer, directivity of a beam is decided by a radiation caliber, and a computation is performed like a half power angle theta1/2 against a frequency. In a formula, (d) is a radiation caliber, and lambda is a wavelength frequency. Thus, a frequency in the oscillating circuit 3 is set arbitrarily, and this permits the selection of an arbitrary size of a beam property having, for example, characteristics shown in a drawing, and permits the simple and sharp changing of a detecting area.
JP9489881A 1981-06-18 1981-06-18 Ultrasonic pulse switch Pending JPS57208482A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9489881A JPS57208482A (en) 1981-06-18 1981-06-18 Ultrasonic pulse switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9489881A JPS57208482A (en) 1981-06-18 1981-06-18 Ultrasonic pulse switch

Publications (1)

Publication Number Publication Date
JPS57208482A true JPS57208482A (en) 1982-12-21

Family

ID=14122844

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9489881A Pending JPS57208482A (en) 1981-06-18 1981-06-18 Ultrasonic pulse switch

Country Status (1)

Country Link
JP (1) JPS57208482A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61167569U (en) * 1985-04-06 1986-10-17

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5424054A (en) * 1977-07-25 1979-02-23 Matsushita Electric Ind Co Ltd Object detecting device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5424054A (en) * 1977-07-25 1979-02-23 Matsushita Electric Ind Co Ltd Object detecting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61167569U (en) * 1985-04-06 1986-10-17
JPH0321495Y2 (en) * 1985-04-06 1991-05-10

Similar Documents

Publication Publication Date Title
KR840000219A (en) Ultrasonic Diagnostic Device
JPS6476374A (en) Depth map producing device
ATE128650T1 (en) ULTRASOUND GENERATOR WITH A PIEZOELECTRIC TRANSDUCER.
JPS55610A (en) Frequency selection device
IT7829514A0 (en) THERAPEUTIC COMPOUNDS AND COMPOSITIONS, PARTICULARLY USEFUL AGAINST RHEUMATOID ARTHRITIS AND OSTEOARTHRITIS.
JPS5510608A (en) Coordinate reader
JPS533178A (en) Crystal vibrator
JPS57208482A (en) Ultrasonic pulse switch
JPS5412693A (en) Elastic surface wave oscillator
JPS5512467A (en) Production of ultrasonic locator
JPS52105752A (en) Surface elastic wave vibrator
JPS5235620A (en) Supersonic waves vibrator
JPS5249205A (en) Apparatus for preparing emulsified oils
JPS56159619A (en) Autofocus camera
JPS5291677A (en) Longitudinal vibration type piezoelectric vibrator
JPS5337456A (en) Distance measuring device
JPS5618778A (en) Ultrasonic image apparatus
JPS526409A (en) Electronic scanning type ultrasonic deflection system
JPS5733819A (en) Surface elastic wave device
JPS52151023A (en) Ultrasonic wave oscillator constant velocity controller
JPS6481376A (en) Laser oscillator
SU573849A1 (en) Sweep-frequency generator
JPS5399792A (en) High-pressure co2 laser equipment
HUNTLEY Portable radar simulator with adjustable side lobe generator(Patent Application)
JPS5693064A (en) Sound wave transmitting system in scanning sonar