便携式建筑物表面裂缝数码检测仪的研制

Research on Portable Building Surface Crack Digital Detector

在建筑物安全鉴定工作中,裂缝检测是重要的依据,但目前尚无能将近距离和远距离检测一体化的裂缝检测装置。针对这一问题,研制一种能实现近距离和远距离测量的便携式建筑物表面裂缝数码检测仪,其具体工作过程为:采集裂缝原始图像,通过USB接口传输到计算机上,利用软件完成裂缝图像的处理、存储和结果显示等功能。用标准样板标定后的实验结果表明:采用该仪器,裂缝近距离(2 m以内)测量时的最小分辨率优于0.01 mm,测量精度优于0.02 mm;观察距离为2～100 m时,可以分辨的裂缝最小宽度不大于0.5 mm,测量精度优于0.5 mm。

Crack detection is important in safety assessment of buildings. However, for the present there is still no crack detec- tion equipment available which can encompass both short-distance and long-distance examination functions. A portable building surface crack digital detector integrating short-distance and long-distance examination functions was developed. Using this detector, images of building surface cracks were acquired and transmitted to computer through USB interface, the functions of image storage, image pro- cessing and results display were performed by software. Experiments were performed at different distances and the measured results were calibrated with standard elements. The experiments show that the minimum resolution of the detector is better than 0. 01 mm, and the measurement accuracy is better than 0. 02 mm when surveying cracks are at a distance shorter than 2 m. When surveying cracks are at a distance of 2 - 100 m, both the minimum resolution and the measurement accuracy of the detector are better than 0.5 mm.