Image measuring system and its calibration of aero engine tip clearance
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摘要: 针对航空发动机装配过程中叶尖间隙的测量，设计了一种影像测量系统，采用基于PC+运动控制卡的开放控制系统，通过PID控制实现对相机位置的精确控制。提出基于相机位置的精确快速完成相机标定，可在线准确测量出叶尖间隙值。相比其他光学影像测量系统及传统塞尺，该测量系统无需高精度标定参考物，可实现装配过程在线测量，测量范围为1 mm时误差小于20 m。Abstract: An image measuring system was designed to measure tip clearance when assembling aero engine. Its camera position was precisely controlled through PID controller, which was based on open control system of PC and motion control card. The camera was calibrated through its accurate movement. The blade tip clearance was measured on line. Compared with other image measuring system and traditional feeler gauge, this system has some advantages: first，it is efficient. Its calibration and measuring process is simple and fast; Second, it can achieve the on-line measurement during the assemble process; Third, when the measuring range is within 1 mm, its error is below 20 m.
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Keywords:
- tip clearance /
- image measurement /
- camera calibration /
- on-line measurement
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