Distributed temperature sensor

Details Distributed temperature sensor Distributed temperature sensor

1993-02-16

1994-02-15

Will, Thomas B.

Thermal measuring and testing

Temperature measurement

By a vibratory effect

333142, 367 87, G01K 1122

Patent

active

052861090

ABSTRACT:
A distributed temperature sensor comprises an elongate ultrasonic waveguide having a number of zones along its length, each zone having a grating formed on it. This is typically achieved by incorporating uniformly spaced notches or bands (or collars) throughout the zone. The grating spacing in each zone is different, so that each grating reflects a characteristic frequency. This frequency varies as the temperature of the zone varies, so if wide-band ultrasonic pulses are launched into the waveguide, the temperature of each zone can be determined from the reflected frequencies.

REFERENCES:
patent: 3514747 (1970-05-01), Lynnworth et al.
patent: 3540265 (1970-11-01), Lynnworth et al.
patent: 3931593 (1976-01-01), Bongianni
patent: 4762425 (1988-08-01), Shakkottai et al.
patent: 5022014 (1991-06-01), Kulczyk et al.
patent: 5044769 (1991-09-01), Kulczyk et al.

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