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Stress and strain sensor

A stress-strain and sensor technology, applied in the field of measurement, can solve problems such as poor maintainability, limited application range, and high requirements for strain gauge implementation, and achieve the effect of improving durability, maintainability, and compatibility

Active Publication Date: 2018-07-27
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a stress-strain sensor to solve the problems of high implementation requirements, poor maintainability and limited application range of strain gauges in the prior art

Method used

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Embodiment Construction

[0025] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] The invention relates to a strain gauge sensor, which generally consists of two parts, a resistance strain gauge and a measurement conversion circuit. The working principle of the resistance strain gauge is: when the resistance strain gauge is used, it is glued to the tested piece. When the tested piece is deformed by force, the length and cross-sectional area of ​​the metal wire in the strain gauge also change with the tested piece. , and then the change of resistance occurs. Since the change of strain and the relative change of resistance have a linear correspondence relationship, the corresponding strain increment can be calculated by measuring the change value of the output voltage of the bridge by using the Wheatstone bridge.

[0027] Such as image 3 and Figure 4 As shown, the embodiment of the present invention provides a kind ...

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Abstract

The embodiment of the invention provides a stress strain sensor. The stress strain sensor comprises a sensing element and a cladding, wherein the sensing element is coated with the cladding; and at least one part of the cladding is made of composite material. The sensor improves the wearing property and the maintainability of the sensing element for the sensor, and also improves the compatibility between the sensor and a contact surface of a tested piece when the tested piece of the composite material is measured, so that the sensor can preferably transmit the strain of the tested piece of the composite material.

Description

technical field [0001] The invention relates to the field of measurement technology, in particular to a stress and strain sensor. Background technique [0002] With the wide use and particularity of wind turbine blades and nacelles, strain gauges (medium temperature foil resistance strain gauges) are commonly used to measure the stress and strain of composite nacelle and blades, but strain gauges often include the following three deficiencies Where: [0003] First, the implementation requirements are high, the installation process and process are complicated, and the efficiency is low, so it is not suitable for batch use (the installation of strain gauges requires professional skills, so if it is to be used in large-scale batches, it is necessary to train a large number of professional installers to implement) . In addition, due to the uneven skills of the technicians, the test results are quite different. [0004] Second, the maintainability is poor and the maintenance c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L1/22
CPCG01L1/2281
Inventor 聂峰杨建军
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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