JPS6445009A - Piezoelectric cable for towing - Google Patents

Piezoelectric cable for towing

Info

Publication number
JPS6445009A
JPS6445009A JP20211787A JP20211787A JPS6445009A JP S6445009 A JPS6445009 A JP S6445009A JP 20211787 A JP20211787 A JP 20211787A JP 20211787 A JP20211787 A JP 20211787A JP S6445009 A JPS6445009 A JP S6445009A
Authority
JP
Japan
Prior art keywords
produced
lead wires
piezoelectric elements
electrodes
acoustic waves
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
JP20211787A
Other languages
Japanese (ja)
Inventor
Koji Ogura
Kasumi Ogawa
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.)
Niterra Co Ltd
Original Assignee
NGK Spark Plug 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 NGK Spark Plug Co Ltd filed Critical NGK Spark Plug Co Ltd
Priority to JP20211787A priority Critical patent/JPS6445009A/en
Publication of JPS6445009A publication Critical patent/JPS6445009A/en
Pending legal-status Critical Current

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  • Insulated Conductors (AREA)

Abstract

PURPOSE:To prevent effects of other than acoustic waves by attaching the terminal surfaces of a pair of piezoelectric elements of different polarization in the diametrical direction coaxially with each other through an insulating plate, connecting inner electrodes with each other, and enclosing insulating oil through flexible electric cores at the center. CONSTITUTION:Insulating oil is filled in flexible tubes for preventing short- circuit of electrodes of lead wires 9a, 9b and cylindrical piezoelectric elements 5a, 5b. If acoustic waves are transmitted from the circumference of the flexible tubes, a signal voltage is produced at the cylindrical piezoelectric elements 5a, 5b of each wave receiving element 3 and it is taken out from the lead wires 9a, 9b. In the meanwhile, if tensile force is applied axially to the left from a core conductor 2, the element 5a is pressed by inertial force in the right inside to an insulating plate 4 to shrink axially and expand diametrically. The element 5b is deformed in the opposite direction. Since polarity of produced charges in the elements 5a, 5b is the same for inner and outer electrodes, potential difference is not produced at the lead wires 9a, 9b wired at outer electrodes 7a, 7b. Produced charges offset each other to deformation in the perpendicular direction to the axis.
JP20211787A 1987-08-13 1987-08-13 Piezoelectric cable for towing Pending JPS6445009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20211787A JPS6445009A (en) 1987-08-13 1987-08-13 Piezoelectric cable for towing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20211787A JPS6445009A (en) 1987-08-13 1987-08-13 Piezoelectric cable for towing

Publications (1)

Publication Number Publication Date
JPS6445009A true JPS6445009A (en) 1989-02-17

Family

ID=16452243

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20211787A Pending JPS6445009A (en) 1987-08-13 1987-08-13 Piezoelectric cable for towing

Country Status (1)

Country Link
JP (1) JPS6445009A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5303584A (en) * 1991-12-24 1994-04-19 Ngk Insulators, Ltd. Intake air flow rate measuring apparatus for internal combustion engine, having water-absorptive porous protective member
US5305682A (en) * 1991-01-10 1994-04-26 Smc Corporation Piping and wiring lead-out mechanism for rodless cylinder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5305682A (en) * 1991-01-10 1994-04-26 Smc Corporation Piping and wiring lead-out mechanism for rodless cylinder
US5303584A (en) * 1991-12-24 1994-04-19 Ngk Insulators, Ltd. Intake air flow rate measuring apparatus for internal combustion engine, having water-absorptive porous protective member

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