Sensor matching through real-time output compensation

Details Sensor matching through real-time output compensation Sensor matching through real-time output compensation

1994-05-16

1995-11-07

Noland, Thomas P.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

36457102, 364572, G01L 2700

Patent

active

054638933

ABSTRACT:
The output of a second sensor is matched to the output of a first sensor. The sensors, such as two microphones, are generally identically and simultaneously exposed to a physical quantity which they have been designed to sense. Their outputs are presented as digital outputs. The second sensor's digital output is numerically adaptively filtered using an adaptive filter having adaptive filtering coefficients. The filter's output is equal to the sum of the products of the second sensor's digital outputs and the associated adaptive filtering coefficients, with the sum taken over a predetermined number of sampling intervals. The adaptive filtering continues until the adaptive filtering coefficients are determined such that the filter's output matches the first sensor's digital output to within a predetermined value. Thereafter, the second sensor's digital output is filtered with fixed coefficients which are equal to the adaptively-determined coefficients.

REFERENCES:
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patent: 5161405 (1992-11-01), Macquecne
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patent: 5402669 (1995-04-01), Pla et al.
"Adaptive Signal Processing", Widrow et al., 1985 by Prentice-Hall, Inc., Englewood Cliffs, N.J., pp. 17 and 100. (p. 17 Lower Right Hand Corner Turn Off, p. 100 Lower Left Hand Corner Turn Off) (Some Text Missing).

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