JPS57208721A - Ultrasonic wave delay line - Google Patents

Ultrasonic wave delay line

Info

Publication number
JPS57208721A
JPS57208721A JP56094156A JP9415681A JPS57208721A JP S57208721 A JPS57208721 A JP S57208721A JP 56094156 A JP56094156 A JP 56094156A JP 9415681 A JP9415681 A JP 9415681A JP S57208721 A JPS57208721 A JP S57208721A
Authority
JP
Japan
Prior art keywords
waves
sound absorbing
width
ultrasonic wave
lambda
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
JP56094156A
Other languages
Japanese (ja)
Other versions
JPH0115167B2 (en
Inventor
Noriaki Sekine
Takeshi Sawaragi
Hiroshi Kitamura
Mikito Baba
Nobuyuki Ogasawara
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.)
Mitsumi Electric Co Ltd
Original Assignee
Mitsumi Electric Co 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 Mitsumi Electric Co Ltd filed Critical Mitsumi Electric Co Ltd
Priority to JP56094156A priority Critical patent/JPS57208721A/en
Publication of JPS57208721A publication Critical patent/JPS57208721A/en
Publication of JPH0115167B2 publication Critical patent/JPH0115167B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
    • H03H9/30—Time-delay networks
    • H03H9/36—Time-delay networks with non-adjustable delay time

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

PURPOSE:To eliminate the propagation of unnecessary waves, by providing a sound absorbing material at an ultrasonic wave propagating region of a delay medium. CONSTITUTION:In an ultrasonic wave delay line 11, a delay medium 2 made of glass is constituted with parallel side surfaces 2a and 2b, a side surface 2c orthogonal to them, and a side surface 2d with an 45 deg. angle to the side surface 2b as a square, and input and output transducers 3 and 4 are provided on the side surface 2d. On both the sides of the medium 2, a band-shaped sound absorbing member 12a made of an epoxy resin of W width is fixed in parallel with a path at the right side of the path of a major waves 6g and a band-shaped sound absorbing member 12b of W width is fixed at the center of the paths of the major waves 6a and 6g. Similarly, band-shaped sound absorbing members 12c- 12f of W width respectively are fixed between the major waves, 6a, 6e; 6e, 6c; 6d, 6b and 6d, 6f. The width W is defined as W=lambda/2Xn or 0<W<<lambda/4 (where; lambda is wavelength of ultrasonic waves and n is an integer).
JP56094156A 1981-06-18 1981-06-18 Ultrasonic wave delay line Granted JPS57208721A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56094156A JPS57208721A (en) 1981-06-18 1981-06-18 Ultrasonic wave delay line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56094156A JPS57208721A (en) 1981-06-18 1981-06-18 Ultrasonic wave delay line

Publications (2)

Publication Number Publication Date
JPS57208721A true JPS57208721A (en) 1982-12-21
JPH0115167B2 JPH0115167B2 (en) 1989-03-16

Family

ID=14102506

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56094156A Granted JPS57208721A (en) 1981-06-18 1981-06-18 Ultrasonic wave delay line

Country Status (1)

Country Link
JP (1) JPS57208721A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63147028U (en) * 1987-03-16 1988-09-28

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5219942A (en) * 1975-08-07 1977-02-15 Fujitsu Ltd Pulse width change circuit
JPS55165511U (en) * 1979-05-15 1980-11-28

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5219942A (en) * 1975-08-07 1977-02-15 Fujitsu Ltd Pulse width change circuit
JPS55165511U (en) * 1979-05-15 1980-11-28

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63147028U (en) * 1987-03-16 1988-09-28

Also Published As

Publication number Publication date
JPH0115167B2 (en) 1989-03-16

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