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A high-sensitivity flexoelectric sensor for shock wave detection

A high-sensitivity, shock-wave technology, applied in the field of sensors, can solve problems such as environmental and human health damage, and achieve high-sensitivity effects

Active Publication Date: 2018-04-17
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In practical industrial applications, most of the piezoelectric materials used are piezoelectric ceramics like lead titanate. However, lead titanate contains heavy metal lead, which is easy to cause harm to the environment and human health.

Method used

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  • A high-sensitivity flexoelectric sensor for shock wave detection
  • A high-sensitivity flexoelectric sensor for shock wave detection
  • A high-sensitivity flexoelectric sensor for shock wave detection

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] As shown in the drawings, the present invention is a high-sensitivity flexoelectric sensor that can be used for shock wave detection, including left metal electrodes 2 and right metal electrodes 4 respectively arranged on the left and right surfaces of flexoelectric dielectric materials 3, the left metal electrodes The electrode 2 is in contact with the left surface of the flexible dielectric material 3; the right metal electrode 4 is in contact with the right surface of the flexible dielectric material 3; the left metal electrode 2 and the right metal electrode 4 are respectively connected with Two lead wires 5 that output the measured charge, the other ends of the two lead wires 5 are connected to the external metal electrodes 8, and the epoxy resin 7 seals the flexoelectric dielectric material 3, the metal electrodes 2, 4 and...

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Abstract

A high-sensitivity flexoelectric sensor that can be used for shock wave detection, including a left metal electrode and a right metal electrode respectively arranged on the left and right surfaces of a flexoelectric dielectric material; the left metal electrode and the right metal electrode are respectively connected with two output measurement charges The other ends of the two lead wires are connected to two external metal electrodes, and the epoxy resin seals the flexible dielectric material, metal electrodes and lead wires; the metal screen has a pressure channel for the shock wave to apply pressure; the shell is bonded to the metal screen Connected together, epoxy resin is consolidated inside; the present invention measures the shock wave pressure through the linear relationship between the strain gradient produced by the flexoelectric dielectric material under shock wave compression and the charge generated based on the flexoelectric dynamic effect the size of.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a high-sensitivity flexoelectric sensor that can be used for shock wave detection. Background technique [0002] The phenomenon of electromechanical coupling widely exists in various artificial and natural materials. Traditional piezoelectric sensors are made using the phenomenon that certain dielectric materials have a piezoelectric effect when they are stressed. The piezoelectric effect refers to the phenomenon that when some dielectrics are bent or deformed by external forces in a certain direction, charge accumulation occurs on the surface due to the polarization of internal charges. Piezoelectric sensors are used to measure the surface charge and use the electromechanical coupling relationship to realize other non-electrical measurements, and are widely used in mechanics, acoustics, medicine, aerospace and national defense. [0003] Although piezoelectric materials have su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/00G01L1/16
CPCG01L1/16G01L5/0052
Inventor 胡涛涛申胜平梁旭卢建锋贾坤刘群峰
Owner XI AN JIAOTONG UNIV
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