METHOD AND DEVICE FOR MEASUREMENT OF THE RATE OF CHANGE OF FREQUENCY OF A PULSE TRAIN

摘要

A device for measuring the rate of change of a pulse train from a transducer (12) includes first counting means (18, 22) which counts the number of pulses in a first fixed frequency to pulse train during each interval between the signal pulses. A divider (28) receives the count generate in the preceding interval and divides the frequency f1 of a second fixed frequency pulse train by this number. The divider pulse train is counted by a second counting means (30) for the duration of each interval.