Ultrasensitive apparatus and method for detecting change in flui

Details Ultrasensitive apparatus and method for detecting change in flui Ultrasensitive apparatus and method for detecting change in flui

1980-09-05

1984-02-21

Caldwell, Sr., John W.

Communications: electrical

Condition responsive indicating system

Specific condition

374 30, G08B 2100, G01K 1700

Patent

active

044333293

ABSTRACT:
Transient change in heat flux due to a small variation in flow conditions (say from no flow-to-flow or vice versa) within a fluid-carrying body under a variety of conditions, is indicated. Ultrasensitivity is achieved by cascading the signal output of a plurality of N thermocouples (i.e., a thermopile), attached to upper and lower metallic plates of a heat flux transducer-meter, the upper plate being in heat transfer contact with at least a sector of the previously-mentioned fluid-carrying body. In a preferred case, N is about 80 but can be as high as 320, if desired. Recordation of the output signals is via a recorder, although use of an audio-alarm to immediately alert an operator of a change in flow conditions, contemplated.

REFERENCES:
patent: 1528383 (1925-03-01), Schmidt
patent: 3312966 (1967-04-01), Schaller
patent: 3431149 (1969-03-01), Webb
patent: 3767470 (1973-10-01), Hines
patent: 4003250 (1977-01-01), Poppendiek et al.
patent: 4102196 (1978-07-01), Holtermann
patent: 4198859 (1980-04-01), Holtermann

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