By analyzing the direct frequency modulation and optical feedback effect of laser diode, a theoretical model for measuring small vibration displacement and velocity is discussed.
分析了在直接频率调制下，激光二极管中的光反馈效应，探讨了振动微小位移和速度的理论模型。
ESPI can measure the object, through forming a carrier pattern on the object surface (carrier pattern modulation), analyze the relation between displacement field and altitude of the object surface.
电子散斑干涉测量技术通过在被测物体表面产生干涉条纹(载频调制条纹)，分析位移场与物面高度之间的关系，可测量物面的形貌。
The technique of carrier modulation in Moiré interferometry is important in displacement measurement of an object.
在物体变形场的测量中，云纹干涉的载频调制技术有重要作用。
One application of CPLD in the measuring system of using frequency modulation displacement sensor is introduced.
介绍了CPLD在调频式位移传感器测量系统中的一种应用。
In a reflective fiber optic displacement sensor, the influence on intensity modulation property caused by the reflector shape was studied theoretically with the mathematic model found.
研究了反射式强度调制型光纤传感器中反射面的形状对光强调制特性的影响，推导得出了含反射面形状因子的光强调制函数。
In a reflective fiber optic displacement sensor, the influence on intensity modulation property caused by the reflector shape was studied theoretically with the mathematic model found.
研究了反射式强度调制型光纤传感器中反射面的形状对光强调制特性的影响，推导得出了含反射面形状因子的光强调制函数。
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