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Self-driven displacement sensor based on friction nano-generator

A technology of displacement sensor and nanometer generator, which is applied in the direction of friction generator, instrument, and electric device, etc. It can solve the problems of high processing technology requirements, poor anti-interference ability, weak output signal, etc., and achieves wide application range and low cost. Inexpensive, close-contact effect

Active Publication Date: 2020-04-24
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, if the dial gauge strain gauge is used, due to the length of the label and the limitation of installation, it is limited in practical application; if the resistance strain gauge is used, it has nonlinearity, weak output signal, poor anti-interference ability, and is affected by the environment. Larger, and it can only measure the strain of a point on the surface of the component along a certain direction and cannot perform global measurement; if a vibrating wire sensor is used, the requirements for sensor materials and processing technology are high, and the measurement accuracy is low

Method used

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Embodiment Construction

[0017] The purpose and effects of the present invention will become clearer by describing the present invention in detail according to the accompanying drawings and preferred embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] Such as figure 1 As shown, the displacement sensor of the present invention includes a cylindrical inner column and a cylinder with a cylindrical cavity, one end of the inner column is fixedly connected to the member to be measured, and the other end is inserted into the cavity of the cylinder The cylinder is fixed on a stable fixed end; the inner column is composed of an inner rigid substrate 7, an inner electrode layer 5 and an inner dielectric material layer 4 from the inside to the outside, and the cylinder is composed of The outer dielectric material layer 3, the outer electrode layer 2 and the outer rigid substrate 1 are compo...

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Abstract

The invention provides a self-driven displacement sensor based on a friction nano-generator. The displacement sensor comprises a cylindrical inner column and a cylinder with a cylindrical cavity. Oneend of the inner column is fixedly connected to a component to be measured, the other end of the inner column is inserted into the cavity of the cylinder. The inner column generates axial relative displacement with cylinder along with displacement of a to-be-measured component, and the inner dielectric material layer and the outer dielectric material layer rub each other to generate an electric signal. Compared with other strain measurement devices, the self-driven displacement sensor based on the friction nano-generator has the advantages of simple structure, wide application range, high measurement precision, no need of additional power supply, low cost and the like. Meanwhile, the self-driven displacement sensor has the characteristics of low cost, high precision, wide application range, easy processing, simplicity and convenience in operation and the like.

Description

technical field [0001] The invention relates to a self-powered sensor device for structural dynamic displacement monitoring, in particular to a self-driven displacement sensor based on a friction nanogenerator. Background technique [0002] Under the action of external loads such as wind load, earthquake load and traffic load, civil engineering structures will produce vibration and displacement, exceeding a certain limit will affect the normal use of the structure, and even cause structural damage, so it is necessary to strengthen the structure of the building Vibration displacement monitoring to ensure its safety and feasibility. Most of the current displacement monitoring is done by strain testing. The structural strain testing is a very important link for engineers to optimize the design of the structure, understand the stress state of the structure and ensure the safety of the structure. In today's civil engineering industry, strain measuring instruments are widely used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/02H02N1/04
CPCG01B7/02H02N1/04
Inventor 张鹤姚璘杰王莉
Owner ZHEJIANG UNIV
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