公开(公告)号：US3838924A

公开(公告)日：1974-10-01

申请号：US26348972

申请日：1972-06-16

申请人： SINGER GENERAL PRECISION

发明人： CROTON ON HUDSON G ,  FLOWER R ,  GAMERTSFELDER G

IPC分类号： G01S17/50 ,  G01P3/36

CPC分类号： G01S17/50

摘要： A source of radiation such as a laser directs a substantially monochromatic beam towards a reference surface. An optical grating located near the source, in conjunction with a photodetector, transforms the reflected radiation into an electrical signal. A standard frequency is generated internally of the device and is compared, by suitable circuitry, with the frequency obtained from the reflected radiation. Positive and negative values are obtained for the velocity components from the comparison of these two signals. Additionally, the existence of this internal standard permits the measurement of zero and nearzero velocity.

摘要翻译： 诸如激光的辐射源将基本上单色的光束引向参考表面。 位于光源附近的光栅与光电检测器一起将反射的辐射转换成电信号。 标准频率在器件内部产生，并通过合适的电路与从反射辐射获得的频率进行比较。 从这两个信号的比较中获得速度分量的正值和负值。 此外，该内部标准的存在允许测量零和接近零的速度。