Mi. Kiselev et al., PHOTOELECTRIC METHOD OF MEASURING THE ROTATION PERIOD OF A TURBINE DRIVE SHAFT, Measurement techniques, 39(12), 1996, pp. 1207-1209
The rotation period have been measured for a turbine shaft in a therma
l power station by an optoelectronic method. The electronic unit is sc
reened from electromagnetic interference at line frequency, and the fi
ber-optic lines provide a measurement error of 5.10(-4)%.