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새로운 방식의 고속 펄스모드 스위칭 기능을 갖는고역률 직류전원장치
최종운,유도종 대한전기학회 2004 전기학회논문지C Vol.53 No.1(C)
- A new laser Doppler velocimeter employing a CO2 laser has been developed by using its photoacoustic effect. A change in the pressure of a discharge, induced by mixing of a returned wave with an originally existing wave inside the cavity, is employed to detect the Doppler frequency shift. We found that a Doppler frequency shift as much as 34 ㎑ was detected, and also a good linear relationship between the velocity and the Doppler frequency shift was obtained.