Axial deviation double-sensitive grid interdigital metal strain plate capable of measuring axial deviation of surface strain

A metal strain gauge, axial deviation technology, applied in the field of sensors, can solve the problem of inability to detect strain partial derivatives, and achieve the effect of detecting axial partial derivatives

Active Publication Date: 2015-11-25
江苏明泰工程机械制造研究院有限公司
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Problems solved by technology

[0012] In order to overcome the deficiency that the existing metal strain gauges cannot detect the strain deflection, the present invention provides an axial deviation double-sensi

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  • Axial deviation double-sensitive grid interdigital metal strain plate capable of measuring axial deviation of surface strain
  • Axial deviation double-sensitive grid interdigital metal strain plate capable of measuring axial deviation of surface strain
  • Axial deviation double-sensitive grid interdigital metal strain plate capable of measuring axial deviation of surface strain

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] refer to Figure 1 ~ Figure 3 , an axial deviation double sensitive grid interdigitated metal strain gauge capable of measuring the axial deflection of surface strain, including a base, and the metal strain gauge also includes two sensitive grids, each of which is connected to a a lead wire, the two sensitive grids are fixed on the substrate;

[0031] Each sensitive grid includes a sensitive section and a transition section, the two ends of the sensitive section are transition sections, the sensitive section is in the shape of a long and thin strip, the transition section is in a thick and short shape, and the resistance of the sensitive section is much greater than the The resistance of the transition section, the resistance change value of the sensitive section under the same strain state is much greater than the resistance change value of the transition sect...

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Abstract

The invention discloses an axial deviation double-sensitive grid interdigital metal strain plate capable of measuring axial deviation of surface strain. The metal strain plate comprises a substrate and two sensitive grids, wherein two ends of each sensitive grid are respectively connected with a leading-out line, the two sensitive grids are fixed on the substrate, each sensitive grid comprises a sensitive section and a transition section, and the axes of all the sensitive sections are linear, parallel and within the same plane; the direction perpendicular to the axial direction which is the direction of the axes of the sensitive sections in the plane determined by the axes of the sensitive sections is a transverse direction; the two sensitive grids are consistent in resistance variation under the same strain, and are respectively a left sensitive grid and a right sensitive grid in the axial direction from left to right; and on the plane determined by the axes of the sensitive sections, the left sensitive grid and the right sensitive grid are arranged in an interdigital mode. The metal strain plate can be used for measuring strain and effectively detecting axial first-order deviation of the surface strain.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a metal strain gauge. Background technique [0002] The working principle of the metal resistance strain gauge is the resistance strain effect, that is, when the metal wire is subjected to strain, its resistance changes correspondingly with the magnitude of the mechanical deformation (stretch or compression). The theoretical formula for the resistance strain effect is as follows: [0003] R = ρ L S - - - ( 1 ) [0004] Where R is its resistance value, ρ is the resistivity of the metal material, L is the length of the metal material, and S is the cross-sectional area of ​​the metal material. During the process of mechanical deformation of the metal wire under strain, ρ, L, and S will all change, which will inevitably cause changes in the ...

Claims

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Application Information

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IPC IPC(8): G01B7/16
Inventor 张端
Owner 江苏明泰工程机械制造研究院有限公司
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