大轴弯曲激光精密自动测量系统

Automatic measurement of turbine rotor bend using laser scanning technology

提出了用激光扫描技术测量汽轮机转子弯曲量的新方法。测量系统用平面转镜进行扫描,采用双狭缝进行扫描自校准,由光电探测器完成光电转换,最后由微机完成数据处理、显示及打印。实验表明,该系统能远距离非接触测量大轴弯曲,测量精度达±5μm,测量距离达4m。

For the great importance of measuring turbine rotor bend for both inspection and repair of turbines, an automatic measurement system, which uses a rotating mirror for scanning, double slots for scanning speed calibration, an optoelectric detector for optoelectric change-over, and a microprocessor for processing, display and printing of data, is proposed for measuring turbine rotor bend using laser scanning technology. Experimental results show that the automatic measuring system is capable of doing remote non-contact measurements of turbine rotor bends with an accuracy of ±5 μm from 4 m away.