| 激光多普勒扭转振动测试技术的研究 |
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| 引用本文： | 桑波,赵宏,谭玉山.激光多普勒扭转振动测试技术的研究[J].中国激光,2003,30(8):743-746. |
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| 作者姓名： | 桑波 赵宏 谭玉山 |
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| 作者单位： | 西安交通大学激光与红外应用研究所,陕西,西安,710049 |
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| 基金项目： | “国家行动计划MEMS智能仪器及其基础理论与技术”基金资助项目 |
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| 摘 要： | 提出了一种差动式可辨向激光多普勒扭转振动测试仪 ,计算并分析了激光多普勒技术的双相检测和矩形光栅的衍射光强分布。采用相位光栅作为光学混频器件 ,提高了测量的信噪比并充分地利用了光能。实验表明 ,该系统能有效地实现旋转轴可辨向扭转振动的测量 ,并可获得较高的精度
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| 关 键 词： | 光学技术与仪器 激光多普勒技术 扭转振动 差拍 相位光栅 |
| 收稿时间： | 2002/3/4 |
Research on the Torsional Vibration Measurement with Laser Doppler Technology |
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| SANG Bo,ZHAO Hong,TAN Yu shan.Research on the Torsional Vibration Measurement with Laser Doppler Technology[J].Chinese Journal of Lasers,2003,30(8):743-746. |
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| Authors: | SANG Bo ZHAO Hong TAN Yu shan |
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| Abstract: | In this paper, a new difference Laser Doppler Vibrometer with directional discrimination is introduced.Two phase detecting technique used to distinguish the direction and the intensity distribution of the phase grating diffraction pattern is analyzed. The phase grating is a frequency mixing device that can get high SNR signals. The experiments prove that the system can be used to measure torsional vibration and distinguish the rotating direction of the rotor, which can arrive at a high accuracy. |
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| Keywords: | optical technique and instrument laser Doppler technology torsional vibration beat phase grating |
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