A digital laser Doppler processor
Abstract
A method which digitalizes the output of the photomultiplier of a laser Doppler velocimetry system and then processes the signal using data reduction software is described. Programs can be adapted to special measurement tasks while eliminating to a large extent the number of specialized hardware processors required. The processor operates in the N-cycle mode, N being chosen to minimize bias. A zero crossing routine is used for data processing. The system was only tested at very low frequencies (10 kHz).
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- July 1980
- Bibcode:
- 1980STIN...8127517F
- Keywords:
-
- Central Processing Units;
- Digital Techniques;
- Laser Doppler Velocimeters;
- Photomultiplier Tubes;
- Signal Processing;
- Analog To Digital Converters;
- Bias;
- Computer Programs;
- Computer Systems Programs;
- Data Acquisition;
- Digital Filters;
- Fortran;
- Roots Of Equations;
- Lasers and Masers