计量学报2025，Vol.46Issue(10)：1419-1425,7.DOI:10.3969/j.issn.1000-1158.2025.10.03
激光测振仪的光频率调制校准方法
Base on Optical Frequency Modulation Method for Laser Vibrometer Calibration
梁志国 1王宁 2梁家奕3
作者信息
- 1. 北京长城计量测试技术研究所 计量与校准技术国家重点实验室,北京 100095
- 2. 中国合格评定国家认可中心,北京 100062
- 3. 电子科技大学 信息与软件工程学院,四川 成都 611700
- 折叠
摘要
Abstract
A laser frequency modulation method using a series acousto-optic modulator is proposed to achieve optical frequency calibration of a wide frequency range laser vibrometer.By directly using a radio frequency signal source to generate a frequency modulation(FM)voltage signal,which is then used to control an acousto-optic modulator,a single frequency laser is converted into an FM optical frequency signal waveform to simulate the laser Doppler effect generated by vibration.The laser vibrometer is calibrated and its value can trace to the time-frequency value of the FM voltage signal.Multiple calibration experiments on a heterodyne laser vibrometer have verified the correctness and feasibility of this method.When the calibration speed is 5 m/s,the vibration frequency can reach 500 kHz with distortion lower than 2.3%,and it is far exceeding the upper limit of 100 kHz vibration frequency that can be generated by current mechanical vibrations.关键词
力学计量/振动/冲击/激光测振仪/检定/校准/测试Key words
mechanics metrology/vibration/shock/laser vibrometer/verification/calibration/test引用本文复制引用
梁志国,王宁,梁家奕..激光测振仪的光频率调制校准方法[J].计量学报,2025,46(10):1419-1425,7.
