Thermopile flow sensor

Details Thermopile flow sensor Thermopile flow sensor

1995-02-24

1996-09-24

Chilcot, Richard

Measuring and testing

Volume or rate of flow

Thermal type

7320411, G01F 168

Patent

active

055579671

ABSTRACT:
A flow sensor adapted for placement along a pacing lead or other catheter comprises a thermopile formed on the outer surface of a tubular substrate. The thermopile comprises a plurality of interconnected conductors of an alternating metal type. Junctions between conductors of the thermopile are alternately located near the longitudinal ends of the flow sensor, so that a voltage generated by the thermopile indicates the difference in temperature between the ends of the flow sensor. To measure blood flow with the flow sensor, an alternating current is induced through the thermopile to heat the flow sensor in a generally symmetrical manner. A voltage generated by the thermopile is then measured to obtain a sample of the magnitude and direction of the velocity of blood flow.

REFERENCES:
patent: 3802264 (1974-04-01), Poppendiek et al.
patent: 4890489 (1990-01-01), Huijsing
patent: 4932250 (1990-06-01), Assaf et al.
patent: 5174299 (1992-12-01), Nelson
patent: 5351551 (1994-10-01), Drubetsky et al.

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