Distributed temperature sensor apparatus

Details Distributed temperature sensor apparatus Distributed temperature sensor apparatus

1986-05-19

1987-06-30

Yasich, Daniel M.

Thermal measuring and testing

Temperature measurement

Combined with diverse art device

364557, 374 6, 374117, G01K 112, G01N 2900

Patent

active

046766650

ABSTRACT:
A liquid-filled tube placed next to a generator winding section provides an indication of an abnormal hot spot which may develop along the winding. The tube is filled with a liquid which vaporizes to form a vapor bubble at the hot spot location. Acoustic energy is projected through the liquid in the tube and is normally received at the distal end of the tube. Presence of a vapor bubble blocks the acoustic propagation and forms a reflective surface for the acoustic energy which then is utilized to calculate distance to the vapor bubble. With a known pressure versus temperature relationship, the pressure of the liquid is controlled such that the hot spot temperature may be determined.

REFERENCES:
patent: 4232551 (1980-11-01), Pierce
patent: 4471474 (1984-09-01), Fields
patent: 4623264 (1986-11-01), Mitchell

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