<p>A laser Doppler velocimeter uses self-mixing amplification of backreflections from scatterers below the surface of a flow. A time domain signal is divided into segments that are roughly equal to a transit time of particles through a focus of a laser beam. The segments are connected to a frequency domain through the use of an FFT algorithm to produce frequency domain data segments. Signal-to-noise ratio is enhanced through signal processing techniques using the segments to produce a final enhanced signal spectrum.</p>
申请公布号
EP2388614(B1)
申请公布日期
2013.01.30
申请号
EP20110004133
申请日期
2011.05.18
申请人
TELEDYNE INSTRUMENTS, INC.
发明人
CHRISTIAN, WILLIAM R.;DELCHER, RAY C.;CHEN, TONG;KHOSHNEVISAN, MOHSEN;LIESCHESKI, PHILLIP B.;METCALF, MICHAEL A.