科研之友
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摘要
A novel all-fiber multipoint velocity interferometer system for any reflectors (VISAR) is developed and demonstrated. The setup employs single-mode fibers and fiber couplers to create more probing ports based on the all-fiber VISAR. A time division multiplexing scheme is implemented to align the interfering signals of different points in time sequence. A prototype two-point all-fiber VISAR is established and used to measure velocities on the same specimen impacted by the split Hopkinson pressure bar. A preliminary experiment results show good matches with the expected theoretical performance.
- 出版日期2007-5
- 单位复旦大学
