Probe for optically monitoring progress of in-situ vitrification

Details Probe for optically monitoring progress of in-situ vitrification Probe for optically monitoring progress of in-situ vitrification

1987-05-29

1988-08-09

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

405128, 252629, H01J 516

Patent

active

047629916

ABSTRACT:
A detector system for sensing the progress of an ISV process along an expected path comprises multiple sensors each having an input port. The input ports are distributed along the expected path of the ISV process between a starting location and an expected ending location. Each sensor generates an electrical signal representative of the temperature in the vicinity of its input port. A signal processor is coupled to the sensors to receive an electrical signal generated by a sensor, and generate a signal which is encoded with information which identifies the sensor and whether the ISV process has reached the sensor's input port. A transmitter propagates the encoded signal. The signal processor and the transmitter are below ground at a location beyond the expected ending location of the ISV process in the direction from the starting location to the expected ending location. A signal receiver and a decoder are located above ground for receiving the encoded signal propagated by the transmitter, decoding the encoded signal and providing a human-perceptible indication of the progress of the ISV process.

REFERENCES:
patent: 4615833 (1986-08-01), Kaufmann
patent: 4634187 (1987-01-01), Huff et al.

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