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Piezoelectric Element And Device Using Same

A piezoelectric element and equipment technology, applied in the field of fibrous piezoelectric elements, can solve the problems of output signal, no indication, etc.

Active Publication Date: 2018-02-16
TEIJIN FRONTIER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no suggestion of selectively responding to electrical signals in response to stress in a specific position or direction, or high functionality due to compounding of piezoelectric units in the thickness direction of the device, and further technical improvement is a problem.
[0024] In addition, there is a problem of outputting a signal that is not the original purpose in the case of direct contact with the human body or contact with a charged object

Method used

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  • Piezoelectric Element And Device Using Same
  • Piezoelectric Element And Device Using Same
  • Piezoelectric Element And Device Using Same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0782] The conductive fiber 100B was knit while winding eight piezoelectric fibers 100A, thereby obtaining a cord-shaped covered fiber 1003 of a circular-wound material with a length of 10 m. Here, the volume resistivity of the conductive fiber 100B in the coated fiber 1003, that is, the silver-plated nylon fiber is 1.1×10 -3 Ω·cm. Thereafter, one end of the piezoelectric fiber 100A covering the surface of the fiber 1003 was removed to expose the conductive fiber 100B, thereby obtaining a piezoelectric element. the piezoelectric element through image 3 The structure as shown was evaluated for piezoelectric characteristics.

[0783] When the measurement sample 1004 is traced using this piezoelectric element, voltages different from each other can be confirmed by the portion of the base plate 104a and the overlapping portion of the two plates 104a, 104b.

[0784] In addition, the piezoelectric characteristics of the piezoelectric element were evaluated after rubbing 2000 tim...

Embodiment 2）

[0807] The conductive fiber 200B in the cord-shaped piezoelectric element 2001 was connected as a signal line to an oscilloscope (a digital oscilloscope DL6000 series product name "DL6000" manufactured by Yokogawa Electric Co., Ltd.) via wiring and a 1000-fold amplification circuit. The wire-shaped piezoelectric element 2001 is bent by 90 degrees in an electromagnetic wave shielding box protected by a wire mesh that is grounded (grounded).

[0808] As a result, a potential difference of about 100 mV was detected with an oscilloscope as an output from the piezoelectric wire 2001 , and it was confirmed that a sufficiently large electrical signal could be detected by deformation of the piezoelectric wire 2001 .

Embodiment 3）

[0810] The conductive fiber 200B in the string-shaped piezoelectric element 2001 of the string-shaped piezoelectric element 2005 is connected as a signal line to an oscilloscope (Digital Oscilloscope DL6000 series product name of Yokogawa Electric Co., Ltd. "DL6000"). In addition, the conductive fibers 2008 of the weft of the cloth-shaped piezoelectric element 2005 are grounded as a ground (ground) line. In this state, the fabric-shaped piezoelectric element 2005 is bent at 90 degrees in a direction perpendicular to the wire-shaped piezoelectric element 2001 .

[0811] As a result, as an output from the wire-shaped piezoelectric element 2001 of the cloth-shaped piezoelectric element 2005, an electric signal with almost no noise was obtained by an oscilloscope, and a potential difference of about 100 mV was detected. From the above results, it was confirmed that a sufficiently large electrical signal can be detected with low noise by utilizing the deformation of the fabric-sha...

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Abstract

The purpose of the present invention is to provide a fibrous piezoelectric element which enables a large electric signal to be drawn out by stress produced by relatively small deformation. A piezoelectric element includes a braid composed of a conductive fiber and a piezoelectric fiber. In the braid, the conductive fiber is a core, and the piezoelectrsic fiber is a covering fiber that covers the periphery of the conductive fiber.

Description

technical field [0001] The present invention relates to a fibrous piezoelectric element used for touch input devices or pointing devices, surface shape measurement, and the like. Furthermore, in detail, it relates to a method in which a sufficient electric output can be generated as a touch sensor or the like only by rubbing the surface of a fibrous piezoelectric element, and the height direction of the object to be measured can be obtained by rubbing the surface of the object to be measured using a fibrous piezoelectric element. A sensor for position information or shape information. [0002] The present invention also relates to a wire-like piezoelectric element using piezoelectric fibers, a fabric-like piezoelectric element using the wire-like piezoelectric element, and a device using them. [0003] The present invention also relates to a cord-shaped piezoelectric element in which a cord using piezoelectric fibers is covered with a conductive layer, a fabric-shaped piezoel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/087H01L41/047H01L41/053H01L41/113H01L41/193H01L41/45G01L1/16
CPCG01L1/16D03D1/0088G06F3/0414H10N30/87H10N30/302H10N30/857H10N30/098H10N30/702H10N30/60H10N30/88H10N30/30H10N30/06H10N30/206
Inventor 田实佳郎小野雄平山本智义兼松俊介S.吉崎小泽优
Owner TEIJIN FRONTIER CO LTD
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