Ultra slow speed tachometer

Details Ultra slow speed tachometer Ultra slow speed tachometer

1980-12-30

1983-08-02

Karlsen, Ernest F.

Electricity: measuring and testing

Electrical speed measuring

Including speed analog electrical signal generator

324166, G01P 344, G01P 348

Patent

active

043968848

ABSTRACT:
In order to develop a suitable analogous voltage to the speed of operation of slow moving machinery having cyclical characteristics, the instant invention provides means for generation of a repetitive electrical input signal for each revolution of cycle of machine operation. The time between repetitions of the input signal is measured, the reciprocal of the elapsed time between cycles or revolutions is calculated, appropriately scaled, and presented as a voltage analog which is proportional to the speed at which the machinery operates. This voltage analog signal may be utilized in conjunction with analog or digital totalizing circuitry to provide totalized signals that may be used to identify the point at which preventative maintenance should be conducted.

REFERENCES:
patent: 3553597 (1971-01-01), Bugay
patent: 3743940 (1973-07-01), Yamagata

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