Method of speed measure on turbo superchargers of internal...

Details Method of speed measure on turbo superchargers of internal... Method of speed measure on turbo superchargers of internal...

2007-10-16

2007-10-16

Barlow, John (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Speed

C702S056000, C702S076000, C702S147000, C702S077000, C123S192100, C073S660000, C073S579000, C060S322000

Reexamination Certificate

active

11365204

ABSTRACT:
A method of determining speed of rotation of a motor is provided. The method involves collecting samples with a measuring sensor at a sampling frequency, set on the basis of mechanical vibration of the motor, for the duration of a measurement period and storing the samples in the memory of a data carrier as measurement data of a fixed format. The speed of rotation of the motor is determined from the measurement data by determining the cycle length of a periodic vibration signal in the time domain by a maximum likelihood estimate calculated by maximizing a maximum likelihood function adjusted to the measurement data, the speed of rotation being obtained from the frequency point where the maximum likelihood function obtains its maximum value.

REFERENCES:
patent: 4573358 (1986-03-01), Luongo
patent: 4887468 (1989-12-01), McKendree et al.
patent: 5206816 (1993-04-01), Hill et al.
patent: 5479825 (1996-01-01), Williams et al.
patent: 5483833 (1996-01-01), Dickens et al.
patent: 6584949 (2003-07-01), Franchi et al.

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