Study on Flatness Error Measurement System of Large Plane based on Laser Dots

Abstract

In order to meet the needs of large plane’s flatness error measurement and aim at the time-consuming, laborious, expensive and inefficient problems, a flatness error measurement system of large plane based on laser dots was designed. The measurement system scanned the plane by the distance sensor which was driven by a double degree-of-freedom rotating platform. The Euler angles of distance sensor and the displacement data between the distance sensor and the measured plane were collected by the data acquisition card. Then the measurement system obtained the spatial coordinate values of laser dots through data processing. Eventually, the actual surface was reconstructed and the flatness error was calculated. The measurement results showed that the system could accurately reflect the actual surface and had great significance in promoting the industrial application of large plane’s flatness error detecting device.