多侧头混凝土压缩检测 - 新拓三维技术（深圳）有限公司

Concrete compression was inspected by multiple-probe

Experimental purpose

In the compression test of cylindrical concrete specimens, three groups of XTDIC-CONST 3D full-field strain measurement side heads are used to synchronously observe the displacement field and strain field in three directions because the final fracture area is not fixed.

Overview of inspection scheme

The measuring range of the system is 128mm X96mm.Three probes (each of which contains two 5 million and 35 frames of industrial cameras) are used to capture speckle patterns on the surface of the specimen during compression in real time. Through camera calibration, stereo matching and 3D reconstruction, the data of 3D coordinates, displacement field and strain field on the surface of the object are finally obtained.

Inspection process

（1）Preparing speckle pattern on the surface of specimen.

（2）Setting up camera position and calibrating camera internal and external parameters.

（3）Debugging testing machine to synchronize the force signal.

（4）Rock compression, camera collect data synchronously.

（5）Data analyis.

Data analyis

（1）Accuracy comparison: the strain gauge along the axial and radical direction are pasted on the surface of specimen. The data

measured by DIC, testing machine itself and the strain gauge are compared to observe the deviation

（2）Displacement field and strain field: observe the displacement field and strain field nephogram from three direction, and output

Excel format data.