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Walking type high-precision and wide-range displacement detection apparatus

A displacement detection, high-precision technology, applied in measuring devices, strength characteristics, instruments, etc., can solve problems such as large axial deformation of the sample, and achieve the effect of ensuring accuracy, solving high-precision measurement problems, and high measurement accuracy

Active Publication Date: 2015-03-11
DALIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to provide a device that utilizes a high-precision small-range displacement sensor to realize high-precision continuous measurement of the entire sample axial large deformation range, and solve the problem of large axial deformation of the sample in large-scale and super-large triaxial tests. exact measurement problem

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  • Walking type high-precision and wide-range displacement detection apparatus
  • Walking type high-precision and wide-range displacement detection apparatus
  • Walking type high-precision and wide-range displacement detection apparatus

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Embodiment Construction

[0016] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0017] as attached Figure 1~4 As shown, the parts are cleaned with kerosene during assembly, and the mating surface is oiled after drying. The unprocessed surface of each part should be cleaned, the burrs should be removed, and the anti-rust paint should be dipped; figure 1 There are two sets of identical small-range detection subsystems. Assume that the left side is A system and the right side is B system. Both A system and B system include a small-range high-precision displacement sensor, a displacement sensor fixing bracket, an electric cylinder output shaft, and a front end. Electric cylinder support plate fixing ring, electric cylinder cylinder, servo motor, counterweight pillar, counterweight weight, etc. Let's take system A as an example to illustrate:

[0018] according to figure 1 with figure 2 It can...

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Abstract

A walking type high-precision and wide-range displacement detection apparatus belongs to the technical field of mechanical engineering test. The apparatus comprises a measured movement shaft, an axial movement measuring baffle plate, small-range and high-precision displacement sensors, an electric cylinder body, a servo motor and counterweights. The measured movement shaft drives the axial movement measuring baffle plate in the loading process in order to realize downward movement. The contacts of the small-range and high-precision displacement sensors are vertically arranged to detect the displacement change of the axial movement measuring baffle plate. The two small-range and high-precision displacement sensors are positioned in a staggered manner at intervals to guarantee the measuring continuity. The two small-range and high-precision displacement sensors repeatedly alternatively walk and are accurately located and controlled to realize continuous high-precision measurement of wide-range displacement. The apparatus has the advantages of smart structure, reasonable layout, high measuring precision, solving of the high precision measurement problem in a full wide range, and good popularization value.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering testing and relates to a triaxial test of soil mechanics, in particular to a large-range high-precision displacement detection device. Background technique [0002] To measure the strength and deformation of soils, triaxial testers are often used, which are widely used and can be used to measure a variety of parameters, including shear strength and deformation properties, consolidation characteristics and soil permeability. Among them, the change of the axial displacement of the sample under a certain stress is a very important measurement parameter, and the measurement accuracy of the axial displacement determines the success or failure of the triaxial test. For small and medium-sized triaxial testers, the variation range of the axial displacement of the sample is usually less than 150mm, and the existing linear displacement sensors (such as: inductive, resistive, magnetic ring dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/02G01B21/02
Inventor 孔宪京桑勇邹德高周晨光刘京茂
Owner DALIAN UNIV OF TECH
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