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Sensor unit using electro-active polymer for wireless transmission/reception of deformation information, and sensor using same

A technology of electroactive polymers and sensor units, applied in the direction of transmitting sensing components using electric/magnetic devices, electric/magnetic solid deformation measurement, piezoelectric/electrostrictive/magnetostrictive devices, etc., can solve detection and evaluation Solve problems such as limited firmness of the structure, achieve fast mechanical/electrical ductility response speed, high accuracy, high reliability and stability

Active Publication Date: 2017-05-10
CHUNG ANG UNIV IND ACADEMIC COOP FOUND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, sensors that are not flexible with respect to various external forces (such as fiber Bragg grating sensors (FBG sensors) and piezoelectric sensors PZT) have a very limited range of use in detecting and evaluating the robustness of structures

Method used

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  • Sensor unit using electro-active polymer for wireless transmission/reception of deformation information, and sensor using same
  • Sensor unit using electro-active polymer for wireless transmission/reception of deformation information, and sensor using same
  • Sensor unit using electro-active polymer for wireless transmission/reception of deformation information, and sensor using same

Examples

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Effect test

no. 1 example

[0045] figure 1 is a plan view of a sensor for wireless transmission / reception of deformation information using an electroactive polymer according to a first embodiment of the present invention.

[0046] refer to figure 1 The sensor for wireless transmission / reception of deformation information using electroactive polymers in this embodiment includes a first sensor part (10), a second sensor part (20) and an electrode part (30).

[0047] The first sensor part (10) refers to a sensor unit having a fiber shape comprising an electroactive polymer material acting on the principle of ferroelectric behavior. Ferroelectric electroactive polymers have excellent properties for sensors for sensing deformation, such as fast mechanical / electrical ductility response speed (milliseconds to seconds) versus mechanical / chemical behavior and low impedance, high reliability and stability etc. For example, the first sensor part (10) may be polyvinylidene fluoride PVDF. However, various embodi...

no. 2 example

[0084] Figure 9 An example of the structure of a sensor for wireless transmission / reception of deformation information using an electroactive polymer according to an embodiment of the present invention will be described.

[0085] refer to Figure 9 , the fabric sensor (200) (hereinafter referred to as a sensor) for wireless transmission / reception of deformation information using an electroactive polymer according to an embodiment of the present invention is characterized in that Figure 9 An electroactive polymer fiber coil sensor unit ( 210 ) for wireless transmission / reception of deformation information (hereinafter, referred to as a sensor unit) having a shape of a specific fiber yarn woven into a fabric form is shown in .

[0086] As will be explained below, the sensor unit (210) includes a sensor portion comprising an electroactive polymer material and electrodes. The sensor unit (210) is formed in the shape of a fiber yarn. Accordingly, the sensor unit (210) is woven...

no. 3 example

[0110] Figure 13 is a diagram of a structure of a sensor for wireless transmission / reception of deformation information using an electroactive polymer according to a third embodiment of the present invention.

[0111] refer to Figure 13 The sensor for wireless transmission / reception of deformation information using electroactive polymers according to the third embodiment of the present invention may include a first fiber (500) and a second fiber (510) and may further include a third fiber (520).

[0112] The first fiber (500) refers to at least one group of fibers comprising an electroactive polymer material. The electroactive polymer material means all materials having a characteristic of generating a voltage when the electroactive polymer material is deformed by an external force. For example, the first fiber (500) may comprise an electroactive polymer material based on polyvinylidene fluoride that functions through a relaxation oscillator ferroelectric mechanism. Howev...

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Abstract

Provided is a technique related to a new sensor unit which is flexible in that the sensor unit can be installed in various locations such as inside of a structure with a large curvature, and which can stably measure multi-directional deformation and very efficiently and wirelessly measure deformation information, and thus provided is a technique of a sensor structure which can be universally utilized in various systems for measuring deformation information. The sensor unit using an electro-active polymer for the wireless transmission / reception of deformation information, according to a first embodiment of the present invention, comprises: a first sensor part formed from a fiber or film comprising a ferroelectric electro-active polymer material; a second sensor part configured to include the first sensor part therein, and formed from a matrix comprising a dielectric elastomer electro-active polymer material; and an electrode part provided to come into contact with the first sensor part or the second sensor part and, when external force is applied to the first sensor part or the second sensor part, transmits to the outside an electric signal generated by the first sensor part or the second sensor part.

Description

technical field [0001] The following embodiments relate to a sensor unit configured to include an electroactive polymer material and an electrode structure to sense, for example, deformation of a structure in a wireless and electroless manner, and a sensor using the same Wait. Background technique [0002] Since parts of objects including composite materials, such as structures, deformed by energy, shock, etc. can be restored by elastic force, the deformation is not revealed and the object appears to be maintained in a normal state unlike the case in existing metal structures. However, defects such as separation between fine layers inside the object and fine cracks may occur. Sudden failure and damage of objects can occur when these defects enlarge or persist during operation of the structure or when excessive loads are imposed on the object due to said defects. Therefore, for the safety of the object, it is necessary to sense the position of the damaged portion at an init...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16D03D13/00D03D15/00G01D5/12G01N27/20G01R19/145G08C17/02H02N2/18
CPCD03D13/00D03D15/00G01B7/16G01D5/12G01N27/20G01R19/145G08C17/02H02N2/18D03D15/283D03D15/292D03D15/47D03D1/0088D10B2401/16D02G3/441H10N30/60H10N30/50H10N30/302H10N30/857H10N30/702G01B7/18
Inventor 蒋丞桓裵志勳
Owner CHUNG ANG UNIV IND ACADEMIC COOP FOUND
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