柴油机轴功率激光测试技术的研究

Study on Laser Measuring Technology in Diesel Shaft Power Measurement

主要论述激光斑纹和激光多普勒测量技术在扭矩测量中的应用。激光斑纹现象产生于从粗糙表面散射相干激光束的干涉。对于粗糙表面形成特定的斑纹图样 ,他与被测表面同步运动。周期的靶标运动 ,特别是回转运动 ,引起斑纹图样周期性重复。根据这一性质 。

The application of laser Doppler Velocimetry(LDV) and laser Speckle Metrology to diesel torque measurement is described. Laser speckle phenomenon results from interference of component wavelets in a coherent laser beam scattered from an optical rough surface. The particular speckle pattem formed from the rough surface has the same movement as the measured surface. The periodic target motions,particularly the rotation,will periodically repeat in the speckle pattern. Based on this characteristics, a non-contact Laser torque-meter for measuring the rotating shaft torque is developed.