Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1992-03-04
1993-04-06
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250576, 356438, G01N 1506, G01N 2100
Patent
active
052006298
ABSTRACT:
Radiations of two different frequencies are transmitted through a fluid comprising a mixture of materials, wherein a radiation is absorbed in the range of the radiation absorption by one of the materials, and another radiation is not absorbed, and wherein the radiations operate with pulses of identical pulse repetition frequency and identical pulse intervals. The detected electrical signal from the monitored radiations passed through the fluid, the center frequency of which corresponds to the reciprocal value of the pulse interval, is filtered out with the aid of a filter. The concentration of the absorbing material in the fluid is measured from the amplitude changes of the filtered-out signal. By the use of filters, the bandpass ranges of which are respectively adapted to the occurring pulse repetition frequencies, and based on the interpretation of the measuring signal as a modulated signal, a high safety against noise signals is attained. The measured concentration of the one material is then utilized by a combat circuit to add material into the mixture of fluid, which is constantly being monitored, to at least partly chemically connect the one material or another pollutant material in the fluid into another material to thus reduce the concentration of the same, with the process continuing whereby release of harmful chemicals into the atmosphere is progressively and continuingly diminished.
REFERENCES:
patent: 3804535 (1974-04-01), Rodriquez
patent: 4001595 (1977-01-01), Reisman
patent: 4491730 (1985-01-01), Pedersen
patent: 4539296 (1985-09-01), Manabe
patent: 4641973 (1987-02-01), Nestler et al.
patent: 4737652 (1988-04-01), Faschingleitner et al.
patent: 4888484 (1989-12-01), Harvey
patent: 4967187 (1990-10-01), Dumas et al.
patent: 5002391 (1991-03-01), Wolfrum et al.
patent: 5015099 (1991-05-01), Nagai et al.
Chlean Plants & Engineering Establishment
Messinger Michael
Nelms David C.
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