Method for monitoring the stay time in a restricted conduit

Details Method for monitoring the stay time in a restricted conduit Method for monitoring the stay time in a restricted conduit

2003-12-22

2009-02-10

Larkin, Daniel S (Department: 2856)

Measuring and testing

With fluid pressure

Pipe

C073S204110, C374S045000

Reexamination Certificate

active

07487665

ABSTRACT:
The disclosure relates to a method of monitoring the stay time in a restricted conduit, such as a holding tube in a heat treatment plant. A first measurement registration x of a chemical or physical magnitude, such as the temperature, takes place in the beginning of the restricted conduit. A second measurement registration y of the same chemical or physical magnitude, i.e. the temperature, takes place in the end of the restricted conduit. X and y measure natural temperature variations in the product for which the intention is to control the stay time. The stay time is determined by the time lag t at the best co-variation between x and y. By filtering the measurement registration for y, it is possible to refine the measurement method and compensate for dispersion in the product.

REFERENCES:
patent: 3967500 (1976-07-01), Forster
patent: 4774453 (1988-09-01), Dechene et al.
patent: 100 50 262 (2002-05-01), None
patent: 1 439 324 (1976-06-01), None
patent: 2 057 141 (1981-03-01), None
patent: 01/98738 (2001-12-01), None

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