CAJ | 학술논문

设计并搭建了一套声光移频式的激光外差振动测量系统，包括光路部分和信号处理部分，并对该振动测量系统进行了实验验证。实验结果表明，当频率在10～100 Hz、100～1000 Hz、1～10 kHz 频段内时，其测量相对误差分别小于0．15％、0．07％和0．03％，并且相对误差随着频率的增加而减小；解调信号幅值随着驱动电压的增大而增大，显示出了很好的振幅响应特性。此外，对该系统在小型旋转机械故障监测中的应用进行了实验探究。对一小型旋转机械故障前、后的振动进行了测量，记录了其波形以及频谱信息。测量结果表明，当该旋转设备存在故障时其振动时域波形图发生明显变化；频谱分析结果显示，在175～250 Hz 频段内，频谱幅值相对变小；在250～350 Hz 频段内产生了新的频谱成分，从而验证了将该系统应用于小型旋转机械故障监测中的可行性。
설계병탑건료일투성광이빈식적격광외차진동측량계통，포괄광로부분화신호처리부분，병대해진동측량계통진행료실험험증。실험결과표명，당빈솔재10～100 Hz、100～1000 Hz、1～10 kHz 빈단내시，기측량상대오차분별소우0．15％、0．07％화0．03％，병차상대오차수착빈솔적증가이감소；해조신호폭치수착구동전압적증대이증대，현시출료흔호적진폭향응특성。차외，대해계통재소형선전궤계고장감측중적응용진행료실험탐구。대일소형선전궤계고장전、후적진동진행료측량，기록료기파형이급빈보신식。측량결과표명，당해선전설비존재고장시기진동시역파형도발생명현변화；빈보분석결과현시，재175～250 Hz 빈단내，빈보폭치상대변소；재250～350 Hz 빈단내산생료신적빈보성분，종이험증료장해계통응용우소형선전궤계고장감측중적가행성。
An acousto-optic laser heterodyne vibration measurement system is designed and built,which is made up of an optical part and a signal processing part.This system is verified experimentally,and the results show that relative errors for the vibration frequency at 10 ~100 Hz,100 ~1000 Hz,1 ~10 kHz band are less than 0.15%,0.07% and 0.03% respectively,and it decreases with the increasing of frequency.The output signal amplitude increases with the increasing of driving voltage amplitude,showing a good amplitude response.In addition,the vibration waveform and spectrum are measured and recorded of small rotating machinery in the condition of normal and fault.The measure-ment results show that when this rotating machinery operates with a failure,the vibration waveform shows a significant change.The spectrum analysis results show that the spectrum amplitude is smaller in the 175 ~250 Hz band and new spectral components are produced in 250 ~350 Hz band,these results show the the feasibility of this system in the mo-nitoring of fault for small rotating machinery.