JPS57145497A - Wave transmitter and receiver - Google Patents

Wave transmitter and receiver

Info

Publication number
JPS57145497A
JPS57145497A JP3166981A JP3166981A JPS57145497A JP S57145497 A JPS57145497 A JP S57145497A JP 3166981 A JP3166981 A JP 3166981A JP 3166981 A JP3166981 A JP 3166981A JP S57145497 A JPS57145497 A JP S57145497A
Authority
JP
Japan
Prior art keywords
electrodes
receiver
wave transmitter
bellows
cylinder
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
JP3166981A
Other languages
Japanese (ja)
Other versions
JPH0258839B2 (en
Inventor
Yukio Saito
Sadayuki Takahashi
Haimi Takasaki
Hiroshi Obara
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.)
Kureha Corp
NEC Corp
Original Assignee
Kureha Corp
NEC Corp
Nippon 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 Kureha Corp, NEC Corp, Nippon Electric Co Ltd filed Critical Kureha Corp
Priority to JP3166981A priority Critical patent/JPS57145497A/en
Publication of JPS57145497A publication Critical patent/JPS57145497A/en
Publication of JPH0258839B2 publication Critical patent/JPH0258839B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • H04R17/005—Piezoelectric transducers; Electrostrictive transducers using a piezoelectric polymer

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Transducers For Ultrasonic Waves (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

PURPOSE:To prevent the short circuit between the electrodes without any insulated layer and to reduce the reflection of a received wave sound with a light- weight structure for a wave transmitter/receiver, by forming an oscillator by folding a piezoelectric sheet having the electrodes on both surfaces in an odd number of times and in the form of a bellows. CONSTITUTION:A high molecular piezoelectric sheet 1 containing the electrodes 3 and 4 on both surfaces is folded in an odd number of times and in the form of a bellows. The folded sheet 1 is formed into a cylinder. This cylinder is cut in a desired length. Then at least both end faces of the entire surface are covered watertight with an insulated medium having the acoustic impedance density close to that of the medium to be used.
JP3166981A 1981-03-05 1981-03-05 Wave transmitter and receiver Granted JPS57145497A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3166981A JPS57145497A (en) 1981-03-05 1981-03-05 Wave transmitter and receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3166981A JPS57145497A (en) 1981-03-05 1981-03-05 Wave transmitter and receiver

Publications (2)

Publication Number Publication Date
JPS57145497A true JPS57145497A (en) 1982-09-08
JPH0258839B2 JPH0258839B2 (en) 1990-12-10

Family

ID=12337528

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3166981A Granted JPS57145497A (en) 1981-03-05 1981-03-05 Wave transmitter and receiver

Country Status (1)

Country Link
JP (1) JPS57145497A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60264200A (en) * 1984-06-13 1985-12-27 Shimada Phys & Chem Ind Co Ltd Ultrasonic wave vibrator
JP2010256307A (en) * 2009-04-28 2010-11-11 Tohoku Univ Hardness measuring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60264200A (en) * 1984-06-13 1985-12-27 Shimada Phys & Chem Ind Co Ltd Ultrasonic wave vibrator
JP2010256307A (en) * 2009-04-28 2010-11-11 Tohoku Univ Hardness measuring device

Also Published As

Publication number Publication date
JPH0258839B2 (en) 1990-12-10

Similar Documents

Publication Publication Date Title
DE3061665D1 (en) Ultrasonic transducer
EP0339470A3 (en) Electroacoustic driving circuit
EP0005409A3 (en) Piezoelectric transducers with mechanical amplification for very low frequencies and acoustic antennas
JPS55610A (en) Frequency selection device
CA1035458A (en) Acoustic delay surface wave motion transducer systems with enhanced stability
JPS57145497A (en) Wave transmitter and receiver
JPS5693414A (en) Elastic surface wave element
JPS5660200A (en) Electroacoustic transducer
EP0044732A3 (en) Acoustic surface wave transducer with improved inband frequency characteristics
KR950007307A (en) Surface acoustic wave device
JPS5787700A (en) Transmitter and receiver
GB2336472B (en) Frequency selective radar absorbent structure
US3702448A (en) Impedance matched ultrasonic delay line wherein electrodes consist of bismuth and indium
JPS55121799A (en) Electroacoustic conversion element
JPS57141199A (en) Ultrasonic wave probe
JPS55151810A (en) Elastic surface wave filter
AUPO358896A0 (en) Integrated electronic structure
JPS57181298A (en) Piezoelectric ceramic transducer
JPS5773592A (en) Ultrasonic wave probe and its production
JPS57129510A (en) Surface acoustic wave device
JPS55156500A (en) Electro-acoustic converting element
FR2274171A1 (en) Frequency filter using acoustic surface wave techniques - supplementary electrodes reduce capacity coupling between input and output
GB1516467A (en) Surface acoustic wave resonator
GB1490959A (en) Electrical oscillators
JPS5750198A (en) Transceiver for underwater use