Geometry measurements are very important to monitor a machine part’s health and performance. Optical measurement system have several advantages for the acquisition of a parts geometry: measurement speed, precision, point density and contactless operation. Measuring parts inside of assembled machines is also desirable to keep maintenance cost low. The Raspberry Pi is a small and cost efficient computer that creates new opportunities for compact measurement systems. We have developed a fringe projection system which is capable of measuring in very limited space. A Raspberry Pi 2 is used to generate the projection patterns, acquire the image and reconstruct the geometry. Together with a small LED projector, the measurement system is small and easy to handle. It consists of off-the-shelf products which are nonetheless capable of measuring with an uncertainty of less than 100 μ m
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机译：几何尺寸测量对于监视机器零件的健康状况和性能非常重要。光学测量系统在获取零件几何形状方面具有多个优势：测量速度，精度，点密度和非接触式操作。为了保持较低的维护成本，还需要测量组装好的机器内部的零件。 Raspberry Pi是一款小型且经济高效的计算机，为紧凑的测量系统创造了新的机遇。我们开发了一种条纹投影系统，可以在非常有限的空间中进行测量。 Raspberry Pi 2用于生成投影图案，获取图像并重建几何形状。测量系统与小型LED投影仪一起使用，体积小巧，易于操作。它由现成的产品组成，这些产品仍然能够以小于100μm的不确定度进行测量
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