JPS5639699A - Acoustic transducer - Google Patents

Acoustic transducer

Info

Publication number
JPS5639699A
JPS5639699A JP11516579A JP11516579A JPS5639699A JP S5639699 A JPS5639699 A JP S5639699A JP 11516579 A JP11516579 A JP 11516579A JP 11516579 A JP11516579 A JP 11516579A JP S5639699 A JPS5639699 A JP S5639699A
Authority
JP
Japan
Prior art keywords
cable
electrostatic capacity
inductance
conductor
piezoelectric element
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
JP11516579A
Other languages
Japanese (ja)
Inventor
Satoshi Okada
Nobuo Uesugi
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11516579A priority Critical patent/JPS5639699A/en
Publication of JPS5639699A publication Critical patent/JPS5639699A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
    • G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
    • G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

PURPOSE:To improve conversion efficiency by removing influence of electrostatic capacity by connecting the piezoelectric element side of a coil spring to the cable conductor of an MI cable electrically and by adequately selecting the inductance of the coil spring. CONSTITUTION:The lower end of the conductor of MI cable 6 is electrically connected to the lower end of coil spring 5 and electrode plate 3 and spring 5 is connected in parallel to piezoelectric element 2. Then, inductance Ls of spring 5 is so selected that satisfies Ls=1/(omega<2>Cd). In the expression, Cd is the sum of electrostatic capacity between the conductor of cable 6 and the sheath and that of element 2, and omega is an in-use angular frequency. Thus, electrostatic capacity Cd is canceled by inductance Ls to reduce extremely a reactive current flowing through the electrostatic capacity part between the MI cable and piezoelectric element and electric energy can be supplied to acoustic load (ra) effectively, so that the conversion efficiency can greatly be improved.
JP11516579A 1979-09-10 1979-09-10 Acoustic transducer Pending JPS5639699A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11516579A JPS5639699A (en) 1979-09-10 1979-09-10 Acoustic transducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11516579A JPS5639699A (en) 1979-09-10 1979-09-10 Acoustic transducer

Publications (1)

Publication Number Publication Date
JPS5639699A true JPS5639699A (en) 1981-04-15

Family

ID=14655937

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11516579A Pending JPS5639699A (en) 1979-09-10 1979-09-10 Acoustic transducer

Country Status (1)

Country Link
JP (1) JPS5639699A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6191352A (en) * 1984-10-11 1986-05-09 Kobe Steel Ltd Method for annealing al alloy plate for substrate of magnetic disk hardly causing micro-waving
JPS61187376A (en) * 1985-02-15 1986-08-21 Nippon Mining Co Ltd Substrate for solar battery
JPS6362853A (en) * 1986-09-02 1988-03-19 Kobe Steel Ltd Manufacture of material for magnetic disk substrate
JPS6396254A (en) * 1986-10-14 1988-04-27 Sumitomo Light Metal Ind Ltd Production of al alloy substrate for coated magnetic disk
JPS63216953A (en) * 1987-03-05 1988-09-09 Sumitomo Light Metal Ind Ltd Production of al alloyed substrate for magnetic disk
JPH02205651A (en) * 1989-02-06 1990-08-15 Furukawa Alum Co Ltd Aluminum alloy for magnetic disk base
JP2008169943A (en) * 2007-01-12 2008-07-24 Chugoku Electric Power Co Inc:The Jig and device for preventing tipping-over
GB2515718A (en) * 2013-02-14 2015-01-07 Roger Thomas Hurrey Piezoelectric Sensor Compression Assembly, Self-Test and Background Sensitivity

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6191352A (en) * 1984-10-11 1986-05-09 Kobe Steel Ltd Method for annealing al alloy plate for substrate of magnetic disk hardly causing micro-waving
JPS6253586B2 (en) * 1984-10-11 1987-11-11 Kobe Steel Ltd
JPS61187376A (en) * 1985-02-15 1986-08-21 Nippon Mining Co Ltd Substrate for solar battery
JPH0515072B2 (en) * 1985-02-15 1993-02-26 Nitsuko Kinzoku Kk
JPS6362853A (en) * 1986-09-02 1988-03-19 Kobe Steel Ltd Manufacture of material for magnetic disk substrate
JPS6396254A (en) * 1986-10-14 1988-04-27 Sumitomo Light Metal Ind Ltd Production of al alloy substrate for coated magnetic disk
JPS63216953A (en) * 1987-03-05 1988-09-09 Sumitomo Light Metal Ind Ltd Production of al alloyed substrate for magnetic disk
JPH0364596B2 (en) * 1987-03-05 1991-10-07 Sumitomo Light Metal Ind
JPH02205651A (en) * 1989-02-06 1990-08-15 Furukawa Alum Co Ltd Aluminum alloy for magnetic disk base
JP2008169943A (en) * 2007-01-12 2008-07-24 Chugoku Electric Power Co Inc:The Jig and device for preventing tipping-over
GB2515718A (en) * 2013-02-14 2015-01-07 Roger Thomas Hurrey Piezoelectric Sensor Compression Assembly, Self-Test and Background Sensitivity
GB2515718B (en) * 2013-02-14 2015-09-09 Roger Thomas Hurrey Piezoelectric Sensor Compression Assembly, Self-Test and Background Sensitivity

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