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桥梁构件表面破损三维参数的测量及描述是桥梁检测过程中经常要遇到的技术难题,通过常规检测方法难以实现。但在结构激光辅助下,可以将三维测量转换为二维断面内的测量。在分析其他行业三维测量技术应用的基础上,提出了基于线激光的桥梁表面破损三维参数测量方法。同时,采用数字成像及模式识别技术测量线变形参数,并对反演桥梁构件表面破损三维参数的过程进行了剖析,给出了计算公式的推导过程。通过试验,验证了此方法的可行性。
The measurement and description of the three-dimensional parameters of the surface damage of bridge components are the technical problems often encountered in the bridge detection process, which is difficult to achieve by conventional detection methods. However, with the aid of a structured laser, the three-dimensional measurement can be converted into a two-dimensional cross-section measurement. Based on the analysis of the application of 3D measurement technology in other industries, a method of measuring the 3D parameters of the bridge surface damaged by line laser is proposed. At the same time, digital imaging and pattern recognition techniques were used to measure the deformation parameters of the wire, and the process of retrieving the three-dimensional parameters of the damaged surface of the bridge was analyzed. The derivation of the calculation formula was given. Through experiments, the feasibility of this method is verified.