JPS57103495A - Ultrasonic oscillator - Google Patents

Ultrasonic oscillator

Info

Publication number
JPS57103495A
JPS57103495A JP17873880A JP17873880A JPS57103495A JP S57103495 A JPS57103495 A JP S57103495A JP 17873880 A JP17873880 A JP 17873880A JP 17873880 A JP17873880 A JP 17873880A JP S57103495 A JPS57103495 A JP S57103495A
Authority
JP
Japan
Prior art keywords
oscillator
variance
temperature
heat accumulating
heater
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
JP17873880A
Other languages
Japanese (ja)
Inventor
Teruhito Nakamura
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 JP17873880A priority Critical patent/JPS57103495A/en
Publication of JPS57103495A publication Critical patent/JPS57103495A/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
    • G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

PURPOSE:To prevent the variance of a directional pattern due to temperature, by surrounding the main body of an oscillator with heat accumulating materials and by detecting the temperature of these materials to control turn-on and off of a heater power source when the oscillator is used as a wave transmitting and receiving element of an ultrasonic sensor. CONSTITUTION:Heat accumulating materials 2 such as calcium chloride, sodium carbonate, and sodium thiosulfate are charged around an ultrasonic oscillator 1, and heat accumulating materials 2 and the oscillator 1 are stored in a cover 3. Inside heat accumulating materials 2, a heater 4 and a thermosensitive element 5 are arranged surrounding the oscillator 1, and the terminal of the heater 4 is connected to the terminal of the element 5 through an external power source 6 and a thermoswitch 7. The oscillator 1 is driven by a driving circuit 8. By this constitution, the temperature of the oscillator 1 is kept constant, and the variance of the directional pattern, which is caused by the variance of the resonance frequency, the variance of the wavelength of ultrasonic waves, etc., due to temperature is prevented, and thus, the detection area is kept constant approximately when the oscillator is used as a wave transmitting and receiving element.
JP17873880A 1980-12-19 1980-12-19 Ultrasonic oscillator Pending JPS57103495A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17873880A JPS57103495A (en) 1980-12-19 1980-12-19 Ultrasonic oscillator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17873880A JPS57103495A (en) 1980-12-19 1980-12-19 Ultrasonic oscillator

Publications (1)

Publication Number Publication Date
JPS57103495A true JPS57103495A (en) 1982-06-28

Family

ID=16053717

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17873880A Pending JPS57103495A (en) 1980-12-19 1980-12-19 Ultrasonic oscillator

Country Status (1)

Country Link
JP (1) JPS57103495A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936680U (en) * 1982-09-01 1984-03-07 ナイルス部品株式会社 Ultrasonic transducer dew drop prevention device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5936680U (en) * 1982-09-01 1984-03-07 ナイルス部品株式会社 Ultrasonic transducer dew drop prevention device
JPH039431Y2 (en) * 1982-09-01 1991-03-08

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