基于条纹反射测量技术的太阳能热发电聚光镜面形检测方法研究

卢振武 魏秀东

摘 要：提出了基于条纹反射测量技术的太阳聚光器面形检测方法，使用投影仪在光屏上投射黑白相间的正弦条纹，经被测镜反射后成像于相机，采用四步相移算法计算像面上和光屏上点的对应关系，然后运用迭代算法拟合被测镜方程及镜面上各个点法线方向。面形测量精度达0.2 mrad。试验验证了测量方法的正确性和可行性，研制了测量设备原理样机，并进行了相关测量试验，结果表明，测量设备达到了国际先进水平。

关键词：太阳能热发电 条纹反射测量技术 四步相移算法

Abstract：A surface shape measurement method for the solar concentrator based on fringe reflection technique has been proposed. The sinusoidal black and white fringes are projected at a screen by the projector. The camera captures the image of the fringes reflected by the tested mirror.The corresponding points between the image plane and the screen can be calculated by using the four-step phase-shifting algorithm， and then the tested mirror surface equation can be fitted by using an iterative algorithm.The normal direction of the tested mirror can be calculated.The accuracy of the measurement method is about 0.2mrad.The correctness and feasibility of the measurement methods has been verified by experiments. A prototype of measurement equipment and software has been developed.The measurement experiments show that the equipment has reached the international advanced level.

Key Words：Solar Thermal Power；Fringe Reflection Technique；Four-step Phase-shifting Algorithm

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