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Strain test method using multiple balance reference points

A strain test and reference point technology, applied in the field of strain measurement, can solve problems such as negligible

Inactive Publication Date: 2011-12-14
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The limitations of the existing strain measurement technology are: when measuring the strain of a component under certain ambient temperature and humidity conditions, the influence on the humidity is generally negligible, and the influence of temperature can only be eliminated through theoretical calculations. Since components are also affected by raw materials, construction conditions, Influenced by many factors such as construction technology, construction technology, structure, and load, this strain measurement technology that eliminates the influence of temperature through theoretical calculations can no longer meet today's needs.

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Embodiment Construction

[0032] The multi-balance reference point strain test method provided in this embodiment is specifically described as follows:

[0033] If the strain sensor measures n times of detection data x within a certain test period i i-1 、x i-2 、x i-3 ,...,x i-n , the strain value y after deducting the influence of temperature and humidity i-1 、y i-2 、y i-3 ,...,y i-n equal, the test period is called a group i. The multiple measurements carried out in a group i are sequentially recorded as 1 to n times, which is defined as having n balance reference points, and the nth measurement carried out during the test period of the i group is recorded as x i-n , the multiple measurements made under different working conditions igm during the i-th test period are sequentially recorded as x ig1 、x ig2 、x ig3 ,...,x igm , and y i-1 =y i-2 =y i-3 ,...,=y i-n =y i . .

[0034] The concrete steps of described multi-balance reference point strain test method are as follows:

[0035] 1...

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Abstract

The present invention discloses a strain test method using multiple balance reference points. Multiple measurements are carried out in group i in a certain test period and group j in another test period through a strain sensor, temperature influence functions yiw(s) and yjw(s) of a strain under constant environment humidity, and humidity influence functions yis(w) and yjs(w) of a strain under constant temperature are obtained, and strain values yi(w,s) and yj(w,s) under a specific temperature and humidity can be obtained by conversion. Thus, strain values xigm and xj-n in different working conditions in a same group i and in another different group j under different temperature conditions and humidity conditions are respectively measured, and converted into strain values yigm(w,s) and yj(w,s), strain differences delta y(igm-i)(w,s), delta y(j-i)(w,s), and temperature influence functions delta y(igm-i)w(s) and delta y(j-1)w(s) of the strain differences or humidity influence functions delta y(igm-i)s(w) and delta y(j-i)s(w) under a specific temperature and humidity condition. The strain test method using multiple balance reference points aims to eliminate the influence of environment temperature and humidity on the measurement of the strain of a member, and improve the accuracy of the measurement of the strain.

Description

technical field [0001] The invention relates to strain measurement, in particular to a multi-balanced reference point strain test method. Background technique [0002] Strain measurement technology is an experimental stress analysis method that uses strain sensors to measure the strain of components, and then determines the stress state of components according to the stress-strain relationship. Strain measurement generally needs to measure the strain value of the component under certain temperature and humidity conditions. [0003] The limitations of the existing strain measurement technology are: when measuring the strain of a component under certain ambient temperature and humidity conditions, the influence on the humidity is generally negligible, and the influence of temperature can only be eliminated through theoretical calculations. Since components are also affected by raw materials, construction conditions, Influenced by many factors such as construction technology, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/32
Inventor 陈洪邵旭东
Owner HUNAN UNIV
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