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Piezoelectric thin film sensitivity test method and equipment

A sensitivity test and piezoelectric film technology, applied in measuring devices, measuring fluid pressure, instruments, etc., can solve problems affecting output waveforms, affecting piezoelectric film sensitivity test results, pad wear, etc., to reduce friction and improve The effect of testing efficiency and improving accuracy

Pending Publication Date: 2019-12-20
深圳数联天下智能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current piezoelectric film sensitivity test method will cause wear to the paddle during long-term use, affecting the output waveform, thereby affecting the sensitivity test results of the piezoelectric film

Method used

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  • Piezoelectric thin film sensitivity test method and equipment
  • Piezoelectric thin film sensitivity test method and equipment
  • Piezoelectric thin film sensitivity test method and equipment

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Embodiment Construction

[0035] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0036]Piezoelectric film, also known as polyvinylidene fluoride (PVDF) polymer film, is a new type of polymer piezoelectric material and is used as a dynamic strain sensor. The piezoelectric film is so sensitive that it can even measure the pulse of the human body through the coat. When the piezoelectric film is subject to a certain stress change, the output port will also output a certain amount of charge, which is affected by the sensitivity ...

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Abstract

The invention relates to the technical field of piezoelectric thin film, and discloses piezoelectric thin film sensitivity test method and equipment. The test method is applied to the piezoelectric thin film test equipment. The test equipment comprises a test table, a roller, a driving device and a test device, wherein the test table is provided with a bearing surface, the bearing surface is usedfor bearing a tested piezoelectric thin film and a reference piezoelectric thin film which are laminated, the driving device is used for driving the roller to move on the bearing surface, the test device comprises a controller, and the controller is connected to the tested piezoelectric thin film and the reference piezoelectric thin film. The test method comprises the steps that the controller controls the driving device to drive the roller to roll on the tested piezoelectric thin film and the reference piezoelectric thin film which are laminated; the controller acquires a first electrical signal waveform output from the tested piezoelectric thin film and a second electrical signal waveform output from the reference piezoelectric thin film; and the controller performs sensitivity test on the tested piezoelectric thin film according to the first electrical signal waveform and the second electrical signal waveform. With the test method and the test equipment, disclosed by the embodimentof the invention, the test method and the test equipment can be used for a long time, and an accurate test result is obtained.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of piezoelectric thin films, and in particular to a method and equipment for testing the sensitivity of piezoelectric thin films. Background technique [0002] When the piezoelectric film is produced, there will be different sensitivities, and the sensitivity of the piezoelectric film has a great influence on the ability to collect life signals on the surface of the human skin. When the sensitivity does not meet the requirements, the oscilloscope cannot see the waveform of the signal, which is not conducive to subsequent signals. collection and analysis. Therefore, when the materials come to the factory, the piezoelectric film needs to be inspected to ensure that the sensitivity of the piezoelectric film provided by the supplier meets the product requirements. [0003] The current method for testing the sensitivity of the piezoelectric film mainly uses a pick and a rotating motor. ...

Claims

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Application Information

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IPC IPC(8): G01L27/00
CPCG01L27/002
Inventor 黄锦钊章哲宇牛洋洋
Owner 深圳数联天下智能科技有限公司
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