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High-sensitivity bending electric sensor used 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: 2016-05-11
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • High-sensitivity bending electric sensor used for shock wave detection
  • High-sensitivity bending electric sensor used for shock wave detection
  • High-sensitivity bending electric sensor used 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, a high-sensitivity flexoelectric sensor that can be used for shock wave detection in the present invention includes left metal electrodes 2 and right metal electrodes 3 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 t...

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Abstract

The invention provides a high-sensitivity bending electric sensor used for shock wave detection. The electric sensor comprises a left metal electrode and a right metal electrode which are respectively arranged on the left surface and the right surface of a bending electric dielectric material. The left metal electrode and the right metal electrode are connected with two lead wires for outputting measuring electric charge. Other ends of the lead wires are connected with two externally-connected metal electrodes. The bending electric dielectric material, the metal electrodes and the lead wires are enclosed by epoxy resin. A metal screen is provided with a pressure channel with shock wave imposing pressure. A housing is adhered to the metal screen so as to solidify the epoxy resin therein. According to the invention, based on a linear relation between a strain gradient generated by the bending electric dielectric material under the compression effects of the impact waves and electric charge generated on the basis of the bending electric dynamic effects, size of the pressure of the shock waves is measured.

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 Applications(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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