Strain meter for plastic deformation test and manufacturing and calibration method thereof

A plastic deformation and strain gauge technology, applied in the field of strain gauges, can solve the problems of small strain measurement range, sensitive grid fracture and damage, etc., and achieve the effects of not easy fracture damage, good ductility and elongation

Active Publication Date: 2014-02-26
ZHONGHANG ELECTRONICS MEASURING INSTR
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Problems solved by technology

[0006] In order to overcome the problems of small strain measurement range and the fracture and damage of the sensitive grid when measuring plastic deformation in the aforementioned common strain gauge, the present invention provides a strain gauge for plastic deformation testing that can meet the strain range of 5% to 25% and its manufacturing and calibration method

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  • Strain meter for plastic deformation test and manufacturing and calibration method thereof
  • Strain meter for plastic deformation test and manufacturing and calibration method thereof
  • Strain meter for plastic deformation test and manufacturing and calibration method thereof

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Embodiment Construction

[0026] The present invention designs a strain gauge for plastic deformation testing by comprehensively considering the tolerance of the material of the sensitive grid, the base and the sealing layer and the structural size of the strain gauge on the deformation measurement range. Composed of substrate 1, sensitive grid 2, and sealing layer 3; the material of the sensitive grid matches well with the material of the base and the sealing layer; the structural size of the strain gauge is optimized to adapt to high plastic deformation tests; at the same time, it is calibrated by the mechanical tensile displacement method.

[0027] First of all, the material of the sensitive gate: the low-temperature heat treatment usually used, the common constantan and Karma alloy foils will cause fracture and damage when used for plastic deformation measurement, mainly because the ductility and elongation of these materials cannot reach the corresponding The indicators cannot meet the requirements...

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Abstract

The invention provides a strain meter for a plastic deformation test and a manufacturing and calibration method of the strain meter. The strain meter comprises a substrate, a sensitive grid and a sealing layer, wherein the sensitive grid is obtained by subjecting constantan and tinsel alloy formed in a cold rolling mode to vacuum annealing at 350-550 DEG C for three to six hours. The sensitive grid of the strain meter is obtained by subjecting the constantan and tinsel alloy formed in the cold rolling mode to vacuum annealing, and is good in ductility and elongation and capable of completely meeting measurement requirements of plastic deformation, so that the sensitive grid is not prone to rupture failures in the plastic deformation process.

Description

technical field [0001] The invention relates to a strain gauge, in particular to a strain gauge for plastic deformation testing and its manufacturing and calibration method. The measuring range can reach 50000με-250000με (ie 5%-25%). Background technique [0002] As a sensitive element for force and strain measurement, the strain gauge is mainly composed of a sensitive grid, a substrate, an adhesive and a sealing layer. Sensitive gate materials include constantan and kama, with a thickness of 2-30 μm; base materials include phenolic resin, epoxy resin, polyimide, polyetherether copper, etc., with a thickness ranging from 20-50 μm; the sealing layer is similar to the base, with a thickness of It is 10-30 μm; the overall thickness is about 30-80 μm. Its schematic diagram is as follows figure 1 shown. It is mainly used for experimental stress analysis, test measurement, structural health monitoring, strain sensor, etc. Usually, the measurement range does not exceed 20000με (...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/16
Inventor 晏志鹏熊莫赵家辉张勋吴梅
Owner ZHONGHANG ELECTRONICS MEASURING INSTR
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