sound velocimeter

Sound velocimeter and X-ray Diffraction ( XRD) were used to measure the crystallization and orientation of the fiber.

通过采用声速仪、X-射线衍射（WXRD）等分析与检测手段对纤维取向度和结晶度进行了测定。

some performance parameters of the sound velocimeter system are given, error analysis and pool measurement are carried out in the end.

论文最后测量了系统的有关性能参数，并进行了误差分析和实验测量。

PAN fibers with different drawing ratio and different preoxidation degree were investigated by means of sound velocimeter and X-ray diffraction meter.

采用声速仪及X射线衍射仪对不同牵伸倍数和不同预氧化程度的PAN纤维进行取向度和预氧化程度的测试，并将其结果进行对比。

application of sound velocimeter during the preparation of pan-based carbon fibers

声速仪在PAN基碳纤维制备过程中的应用