Stress monitoring method and stress monitoring device

Abstract

The invention discloses a stress monitoring method and a stress monitoring device. The stress monitoring method comprises the following steps of: A) obtaining images of at least two preset graphs in a measured area of a measured body so as to obtain a reference image before the deformation or loading of the measured body, wherein the preset graphs have characteristic tracking points; B) obtaining images of at least two preset graphs so as to obtain a target image after a predetermined time of deformation and loading; and C) calculating first distances of the characteristic tracking points of at least two preset graphs in the strain measurement direction in the reference image and second distances of the characteristic tracking points of at least two preset graphs in the strain measurement direction in the target image, obtaining the strain of the measured body in the strain measurement direction according to the first and second distances. According to the invention, the strain and stress of the measured body can be measured.

Description

technical field [0001] The invention relates to a stress monitoring method and also relates to a stress monitoring device. Background technique [0002] For heavy and bulky mechanical parts (such as racks), it is extremely difficult to process them using the method of integral manufacturing, which leads to high costs, difficult transportation and increased risks. It is possible to use splitting-hacking technology to manufacture heavy and bulky mechanical parts in sections, and use prestressed steel wire winding technology to apply pre-tightening force to each splitting-hitching surface to increase the stress on each splitting surface. The frictional force keeps the entire mechanical part wound by the prestressed steel wire in its integrity, so as to ensure the mechanical properties of the mechanical part. [0003] During the actual use of mechanical parts wound with prestressed steel wires, the pretensioning force will be lost due to creep, relaxation and a few fractures of...

AI Technical Summary

Problems solved by technology

[0003] During the actual use of mechanical parts wound with prestressed steel wires, the preload will be lost due to the creep, relaxation and a few fractures of the pretensioned steel wires and the deformation of the mechanical parts themselves.

When the pre-tightening force loss of the mechanical part reaches a certain level, it will affect its integrity, and there will be gaps or misalignment, which will affect its normal use and cause safety problems.

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