Potentiometer control dynamic tracking bidirectional synchronous displacement measuring device

Abstract

The invention provides a potentiometer control dynamic tracking bidirectional synchronous displacement measuring device, and belongs to the technical field of geotechnical tests. The device comprisesa stepping motor, an electric sliding table, a laser displacement sensor, a separated rotatable clamp, an electric sliding table top, a local displacement sensor, a potentiometer control structure andan electric sliding table base. A stepping motor connecting shaft is connected with the head end of an electric sliding table transmission shaft; the laser displacement sensor is connected with the separated rotatable clamp, and a stroke assembly of the laser displacement sensor and the separated rotatable clamp is assembled in the center of the upper end of the electric sliding table surface; alocal displacement sensor and a potentiometer control structure are assembled at the central position of the lower end of the electric sliding table surface; the lower end of the electric sliding table is embedded into the electric sliding table base and leveled and fixed. According to the invention, accurate measurement of axial and radial displacements of different local measuring points of a triaxial sample can be realized, and the device can be used for static and dynamic tests and is not restricted by loading conditions; the installation method is simple, the operation is simple and convenient, the measurement precision is high, and the popularization value is good.

Description

technical field [0001] The invention belongs to the technical field of geotechnical tests, and relates to a potentiometer-controlled dynamic tracking bidirectional synchronous displacement measuring device, in particular to a dynamic tracking and synchronous measuring device for local axial-radial displacement of a triaxial sample. [0002] technical background [0003] During the conventional triaxial test, the upper and lower ends of the triaxial sample are in contact with the sample cap and the sample base respectively. Due to the constraints of friction, the force on the end of the sample is the same as that on the middle of the sample during the test loading process. The situation is different, and there will be more obvious differences under different densities, confining pressures or loading rates. Due to the influence of the force condition, the development of the local strain of the sample is extremely uneven. [0004] At present, in order to accurately measure the ...

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Problems solved by technology

[0016] The purpose of the present invention is to provide a device with simple equipment, convenient test operation, and can reduce the interference to the sample during the test, and can accurately measure the local axial-radial displacement of the triaxial sample at the same time. Difficulties in the measurement of local deformation of the sample and the measurement of large local deformation of the sample during the loading process

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