非接触式检测混凝土桥梁裂缝的测距法

传统的混凝土桥梁裂缝检测方法已经不能满足现代桥梁检测的需求。基于数字摄影测量的基本原理,提出了适合于桥梁裂缝非接触检测的测距法。在试验分析基础上,从拍摄角度、环境因素和焦距误差三个方面对系统的误差进行修正。结果表明,误差修正后,检测系统的精度大幅度提高,可以实现桥梁表面裂缝的远距离、非接触测量。

Ranging Method of Non-contact Detection to Cracks of Concrete Bridges

For the traditional crack examination method cannot satisfy the demand of modern bridge examination,a new method which suits to the bridge crack non-contact examination called measure distance method has been put forward in this paper,based on the principle of digital photogrammetry surveying.Three aspects have been corrected including the shooting angle,the environmental factor and the focal distance error at the basis of experimental analysis.Then,the result shows that the precision of examination system is enhanced in a large scale after the error correction,moreover,the long-distance and non-contact measure of bridge surface cracking is realized.