Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1994-05-16
1995-04-04
Raevis, Robert
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
381 58, 367 13, H04R 2900
Patent
active
054026695
ABSTRACT:
A method for matching the second output of a second sensor to the first output of a first sensor wherein a source transducer is driven by a reference analog or digital electrical signal to produce the physical quantity (e.g., acoustic pressure) the sensors (e.g., pressure sensors, such as microphones) can sense. A reference adaptive filter determines filtering coefficients to match the reference electrical signal to the first output of the first sensor and therefore models the source transducer and the first sensor (which typically is an independently-calibrated sensor). Thereafter, a second adaptive filter compensates the second output of the second sensor to match the output from a fixed filter having filtering coefficients identical to those determined by the reference adaptive filter, such output compensation of the second sensor not requiring the presence of the first sensor.
REFERENCES:
patent: 5029215 (1991-07-01), Miller, III
patent: 5125260 (1992-06-01), Hedeen
patent: 5172597 (1992-12-01), Hedeen
"Adaptive Signal Processing", Widrow et al., 1985 by Prentice-Hall, Inc., Englewood Cliffs, N.J. pp. 17 and 100.
Hedeen Robert A.
Pla Frederic G.
Erickson Douglas E.
General Electric Company
Raevis Robert
Webb II Paul R.
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