LASER VIBROMETER CALIBRATION AT HIGH FREQUENCIES USING CONVENTIONAL CALIBRATION EQUIPMENT
LASER VIBROMETER CALIBRATION AT HIGH FREQUENCIES USING CONVENTIONAL CALIBRATION EQUIPMENT
复制标题
使用传统校准设备进行高频激光测振仪校准
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
A. Täubner
中科院分区：
文献类型：
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作者：
T. Bruns;F. Blume;A. Täubner
激光测振仪的校准是工业和科研中日益增长的需求。然而，建议特别用于高频校准的设备通常处于原型阶段，无法在市场上买到。这是由于所采用的零差正交方法对于振动物体的某个最小位移（通常为波长的四分之一）的要求。提交人证明，这不一定是一个强制性条件。使用传统的市售组件，可以设置一个高达90 kHz的激光测振仪校准系统。这可以通过采用独特的光学设置与不寻常的（双频）激励和改进或扩展的信号处理相结合来实现。
The calibration of Laser vibrometer is an increasing demand in industry and research. The equipment suggested for use in particular for high frequency calibration, however, is typically of prototype stage and not commercially available. This is due to the demand of the employed homodyne quadrature method for a certain minimum displacement, typically a quarter of a wavelength, of the vibrating object. The authors demonstrate that this is not necessarily a compulsory condition. With conventional, commercially available components it is possible to set-up a system for Laser vibrometer calibration up to 90 kHz. This could be achieved by employing a distinctive optical set-up combined with an unusual (dual frequency) excitation and an improved or extended signal processing.