Method of using oscilloscope to test rotation speed of fan

Details Method of using oscilloscope to test rotation speed of fan Method of using oscilloscope to test rotation speed of fan

2007-09-03

2010-06-01

Patidar, Jay M (Department: 2858)

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

Reexamination Certificate

active

07728581

ABSTRACT:
An exemplary method for testing rotating speed of a fan, includes the following steps: coupling a fan and a resistor in series to a power supply; coupling an oscilloscope in parallel with the resistor; plotting voltage across the resistor on a screen of the oscilloscope, and obtaining the period of the voltage according to the image; and obtaining the rotating speed of the fan.

REFERENCES:
patent: 2752567 (1956-06-01), Kinkel
patent: 2906953 (1959-09-01), Stadler
patent: 5621159 (1997-04-01), Brown et al.

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