论文部分内容阅读
为了测量在线转子的振动信息,以半导体激光器为光源,以PSD(position sensitive detector)为探测器,基于光电三角测量法,建立了一套包括软、硬件在内的激光测振系统。通过对该系统的标定实验表明,实际位移与所测得的位移呈线性关系。在数据处理中,对所得到的复杂时域振动信号进行了离散傅里叶变换(DFT),从而在频率域获得了转子的振动频率和振幅信息。通过采用多线程高级编程技术,解决了数据处理时间、图像及数据显示、存储时间之间的冲突,实现了在线测量。经测试表明,该测振系统的测量频率分辨率可达到0.6Hz,振幅不确定度小于±10μm。
In order to measure the vibration information of on-line rotors, a laser vibration measurement system including software and hardware was established based on photoelectric triangulation with semiconductor laser as light source and PSD (position sensitive detector) as detector. Calibration experiments on the system show that the actual displacement is linear with the measured displacement. In the data processing, the discrete Fourier transform (DFT) is applied to the obtained complex time-domain vibration signals to obtain the rotor vibration frequency and amplitude information in the frequency domain. Through the use of multi-threading advanced programming technology, to solve the data processing time, image and data display, the conflict between the storage time, to achieve an online measurement. The test shows that the vibration frequency measurement system vibration measurement up to 0.6Hz, amplitude uncertainty less than ± 10μm.