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Large-stroke displacement high-precision measuring device based on dynamic balance work principle

A working principle, high-precision technology, applied in the direction of measuring device, using stable shear force to test material strength, using stable tension/pressure to test material strength, etc., to achieve good economy and promotion value, high measurement accuracy , the effect of smooth motion

Inactive Publication Date: 2016-06-15
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of accurate measurement of the axial displacement of the triaxial tester, and the invented measuring device realizes the high-precision continuous measurement of the sample axial large deformation range of 1000mm

Method used

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  • Large-stroke displacement high-precision measuring device based on dynamic balance work principle
  • Large-stroke displacement high-precision measuring device based on dynamic balance work principle
  • Large-stroke displacement high-precision measuring device based on dynamic balance work principle

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Embodiment Construction

[0020] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0021] Such as Figure 1-5 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, the anti-rust paint should be dipped, and multi-layer raw tape should be wound on the sealing port to strictly ensure the hydraulic cylinder And the tightness of the connection between the hydraulic cylinder and the hose; figure 1 You can clearly see three sets of hydraulic cylinder subsystems A, B, and C. The A subsystem includes the plunger hydraulic cylinder A fixed plate, the oil cylinder / air cylinder output shaft, the axial movement measuring baffle, and the plunger hydraulic cylinder A. Output shaft, plunger-type hydraulic cylinder A, plunger-type hydraulic cylinder A fixing fixture, upper co...

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Abstract

The invention belongs to the field of mechanical engineering testing, and provides a large-stroke displacement high-precision measuring device based on a dynamic balance work principle. A, B and C hydraulic cylinder subsystems are designed below a measured moving shaft, the A subsystem and the B subsystem are plunger type hydraulic cylinders and have the diameter ratio of 1:3; incompressible hydraulic oil is used as a transmission medium; displacement detected by a B system sensor is magnified by 9 times, and a high-precision servo motor can control precisely motion of a lead screw, so that a signal outputted by the B system high-precision displacement sensor can always be maintained in a dynamic stable invariant state. The device has the advantages of smart structure, reasonable layout, strong adaptability, long service life and high measuring precision, can solve the problem of high-accuracy and bidirectional measurement in a wide-range full range, and has good economy and popularization value.

Description

technical field [0001] The invention belongs to the field of mechanical engineering testing and relates to a triaxial test of soil mechanics, in particular to a high-precision displacement detection device for a large-stroke force transmission shaft. Background technique [0002] To measure the strength and deformation of soils a triaxial tester is often used, which is widely used and can be used to measure a variety of parameters including shear strength 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, and magnetic rin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/10G01N3/24G01B21/02G01B21/32
CPCG01B21/02G01B21/32G01N3/10G01N3/24G01N2203/0256
Inventor 桑勇王亚杰邵利来赵健龙胡登极
Owner DALIAN UNIV OF TECH
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