Modulated hydrogen ion flame detector

Details Modulated hydrogen ion flame detector Modulated hydrogen ion flame detector

1974-06-28

1976-02-17

Smith, Alfred E.

Chemistry: physical processes

Physical processes

Crystallization

G01N 2762

Patent

active

039389561

ABSTRACT:
In a hydrogen flame detector there is provided a means for modulating the density of a gas stream prior to its introduction into the detector flame. A detector, responsive to the resulting modulation of the flame, is provided for producing an output signal having a component fluctuating at the frequency of modulation. A cross-correlator, responsive to the output signal and a signal at the frequency of modulation, is provided for producing a resultant signal proportional to the cross-correlation between its two input signals. A means is further provided for recording or otherwise utilizing the resultant signal thus produced.

REFERENCES:
patent: 3443415 (1969-05-01), Clardy
patent: 3740154 (1973-06-01), Green
George, S.F. "Effectiveness of Crosscorrelation Detectors" Proc. of Natio Electronics Conf., Vol X, Feb. 8 1955.

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