Device and method for testing piezoelectric property of electrostatic spinning PVDF (polyvinylidene fluoride) piezoelectric fiber membrane

A piezoelectric fiber and piezoelectric performance technology, which is applied in the field of piezoelectric performance testing devices, can solve the problems of lack of testing devices for testing the dynamic response of piezoelectric materials, inability to test piezoelectric performance of piezoelectric nanofiber films, etc. Observe and compare the effects of real-time changes, flexible assembly, and simple operation

Active Publication Date: 2014-12-17
ANHUI HENGYI TEXTILE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a piezoelectric performance testing device and method for electrospun PVDF piezoelectric fiber film with simple test operation, high measurement efficiency, high precision of electrical signal measuring devi

Method used

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  • Device and method for testing piezoelectric property of electrostatic spinning PVDF (polyvinylidene fluoride) piezoelectric fiber membrane
  • Device and method for testing piezoelectric property of electrostatic spinning PVDF (polyvinylidene fluoride) piezoelectric fiber membrane
  • Device and method for testing piezoelectric property of electrostatic spinning PVDF (polyvinylidene fluoride) piezoelectric fiber membrane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The present invention is a kind of piezoelectric performance testing device of electrospun PVDF piezoelectric fiber film, such as figure 1As shown, its structural features are: the rear part of the base 1 is fixed with a stand 2, and the front side of the stand 2 is equipped with a vertical panel 3 that can move up and down (Z axis), and one end of the vertical panel 3 is connected to the One end of the stepper motor 13 is connected, and the stepper motor 13 can make the vertical panel 3 move up and down, and the anti-overload elastic structure (that is, the overload protection mechanism 4) is fixed on the vertical panel 3 to prevent the contact 8 from pressing on the force sensor 15. If it is too large, the force sensor 15 will be damaged. The vertical panel 3 is also fixed with a fixed motor device 6. One end of the fixed motor device 6 is connected to the upper end of the motor 5, and the lower end of the motor 5 is fixed to the spring 7. The spring 7 can realize the ...

Embodiment 2

[0073] The stress induced in the fiber film is calculated according to the following formula:

[0074] σ = F S

[0075] where σ represents the stress generated in the fiber film, F represents the applied pressure, and S represents the area of ​​the film.

[0076] Calculate the piezoelectric strain constant of the fiber film according to the following formula:

[0077] d 33 = ∂ D ∂ F = Q σ

[0078] where d 33 Represents the piezoelectric strain constant of the fiber film, D represents the charge density, F represents the applied pressure, Q represents the amount of charge generated per unit area of ​​the fiber film, and σ represents the stress generated in the fiber film.

[0079] With frequency f=10Hz ( Figure 4-2-1 , ...

Embodiment 3

[0092] The stress induced in the fiber film is calculated according to the following formula:

[0093] σ = F S

[0094] where σ represents the stress generated in the fiber film, F represents the applied pressure, and S represents the area of ​​the film.

[0095] Calculate the piezoelectric strain constant of the fiber film according to the following formula:

[0096] d 33 = ∂ D ∂ F = Q σ

[0097] where d 33 Represents the piezoelectric strain constant of the fiber film, D represents the charge density, F represents the applied pressure, Q represents the amount of charge generated per unit area of ​​the fiber film, and σ represents the stress generated in the fiber film.

[0098] With frequency f=15Hz ( Figure 4-3-1 , ...

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Abstract

The invention discloses a device for testing piezoelectric property of an electrostatic spinning PVDF (polyvinylidene fluoride) piezoelectric fiber membrane. A vertical seat is fixed in the rear of a base, a vertical panel capable of moving up and down is arranged on the front side of the vertical seat, one end of the vertical panel is connected with one end of a stepping motor, a motor fixing device is arranged on the vertical panel, one end of the motor fixing device is connected with the upper end of a motor, a spring is fixed to the lower end of the motor, the lower end of the spring is connected with a contactor, a first insulation layer is arranged between the contactor and the spring, a force transducer is arranged under the contactor, a second insulation layer and a conductive layer are arranged on the force transducer which is arranged in the middle of a clamp, and the clamp is arranged on the base through a horizontal panel. The device can measure piezoelectric signals generated by a flexible piezoelectric material under different-size and different-frequency pressure actions so as to characterize the piezoelectric property of the piezoelectric material, and measuring results can be computed to obtain piezoelectric strain constants; the electric signal measurement device is high in precision, good in repeatability and comparability and high in measurement efficiency.

Description

technical field [0001] The invention relates to a piezoelectric performance testing device and method of an electrospun PVDF piezoelectric fiber film, which tests and evaluates the piezoelectric performance of an electrospun PVDF nanofiber film, and belongs to the technical field of flexible piezoelectric material measurement. Background technique [0002] Piezoelectric materials used in flexible textiles are mainly piezoelectric polymers, such as polyvinylidene fluoride (PVDF) and other organic piezoelectric materials represented by it. This kind of material has attracted the attention of the world for its advantages such as flexible material, wide frequency response range, good dynamic characteristics, good formability, low impedance and high piezoelectric constant, and has developed very rapidly. It is used in underwater acoustic ultrasonic measurement, pressure sensing, and lead It has been widely used in combustion and detonation. [0003] The flexible PVDF nanofiber f...

Claims

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Application Information

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IPC IPC(8): G01R29/22
Inventor 郎晨宏胡吉永王旋丁辛杨旭东
Owner ANHUI HENGYI TEXTILE TECH CO LTD
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