Flexible transmission type built-in miniature multi-point displacement test system used for model experiment

Abstract

The invention discloses a flexible transfer type built-in micro-multi-point displacement measurement system used for a model test, the structure thereof comprises a bench, a raster ruler, a steel wire rope, a signal conversion system and a data acquisition system, wherein, the steel wire rope penetrates the raster ruler which is fixed on the bench after being led out from a measurement fixed end and is finally connected with a heavy hammer, the raster ruler is connected with the signal conversion system by a guide wire, and the signal conversion system is connected with the data acquisition system by the guide wire. The micro-multi-point displacement measurement system used for a geomechanics model test has the advantages of high precision (precision is 1Mu), real-time property, the capability of testing the horizontal or the vertical model deep micro-displacement and the capability of being turned in the model for testing the displacement, etc. The micro-multi-point displacement measurement system can be widely applied in the displacement tests of deep underground cavern model tests of civil engineering, utility, transportation, energy, mining, national defense and such fields.

Description

technical field [0001] The invention relates to a displacement device, in particular to a flexible transfer type built-in miniature multi-point displacement testing system mainly used in geomechanics for model tests. Background technique [0002] At present, there are many kinds of multi-point displacement testing methods used in actual engineering sites at home and abroad, but the miniature multi-point displacement testing system used in geomechanical model tests is still rare. [0003] A relatively successful example in China is the differential transformer multi-point displacement test system used by Professor Li Zhongkui of Tsinghua University in the geomechanics model test of the cavern group of Xiluodu Hydropower Station. Then, in the geomechanical model test of the Baziling bifurcated tunnel in the west of Hurong, Shandong University and Tsinghua University cooperated to further improve the previous miniature multi-point displacement test system. The main problems are...

AI Technical Summary

Problems solved by technology

[0004] 1. The protective sleeve buried in the model body has a large diameter and is too rigid, which will affect the deformation characteristics inside the model body

[0005] 2. It is not easy to reduce the frictional resistance between the casing and the steel wire, and the accuracy and stability are not high when transmitting displacement changes at long distances

[0006] 3. The operating software needs to be improved, and the visualization of data collection and processing is low

[0007] 4. Due to various factors, the actual measurement accuracy is far lower than 1 micron

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