Optical rotor temperature sensing apparatus using phosphors and

Details Optical rotor temperature sensing apparatus using phosphors and Optical rotor temperature sensing apparatus using phosphors and

1992-07-30

1993-08-03

Cuchlinski, Jr., William A.

Thermal measuring and testing

Temperature measurement

In spaced noncontact relationship to specimen

374153, 374159, 374152, 374161, 2504581, 2504591, 2504611, G01K 1120, G01K 1308

Patent

active

052322858

ABSTRACT:
A temperature sensing apparatus and method of measuring the temperature at the bottom of a rotor slot in a rotating rotor using a temperature sensitive phosphor material. The temperature sensitive phosphor material is placed at the bottom of a rotor slot and is excited, as the rotor rotates, by an excitation source located at a location opposite the rotor, the excited radiation being detected at two spaced locations from the excitation source, the two spaced locations being located also opposite the rotor and spaced apart along the direction of the rotor. Then the decay rate of the detected radiation from the phosphor is determined and from this decay rate the temperature at the bottom of the rotor slot.

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patent: 4789992 (1988-12-01), Wickersheim et al.
patent: 4895156 (1990-01-01), Schulze
Mannik et al., "The Application of Phosphor Thermometry to Generator Rotor Temperature Monitoring," Electrooptic Sensing and Measurement, ICALEO '87 Proceedings, Nov. 8-12, 1987, pp. 23-27.

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