Sensor matching through source modeling and output compensation

Details Sensor matching through source modeling and output compensation Sensor matching through source modeling and output compensation

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.

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