INSTALLATION DE CONTROLE DE LA QUALITE ATMOSPHERIQUE NOTAMMENT DE LA TENEUR EN METHANE DANS LES MINES DE CHARBON

A three-wire digital atmospheric sampling system, particularly adapted to detect methane in mines, wherein accuracy is increased by ratiometric analog-to-digital conversion synchronized by a microprocessor. A reset signal, and read-out pulses indicative of the atmospheric condition, are transmitted...

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Bibliographic Details
Main Author HERBERT HELLER
Format Patent
LanguageFrench
Published 02.05.1986
Edition4
Subjects
ALARM SYSTEMS
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
ORDER TELEGRAPHS
PHYSICS
SIGNALLING
SIGNALLING OR CALLING SYSTEMS
TESTING
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Summary:A three-wire digital atmospheric sampling system, particularly adapted to detect methane in mines, wherein accuracy is increased by ratiometric analog-to-digital conversion synchronized by a microprocessor. A reset signal, and read-out pulses indicative of the atmospheric condition, are transmitted along the same signal wire as are digital ratiometric signals, thus enabling the use of three conductors only between an atmospheric sampling probe, a microprocessor, and a visual read-out console.
Bibliography:Application Number: FR19820006879