FIBRE-OPTIC SENSOR WITH A FLUORESCENT SUBSTANCE

In a fibre optical sensor with a fluorescent substance of fluorescence decay time dependent on a physical parameter, in which the fluorescent radiation is back coupled to the incident radiation, in an oscillation circuit, so that the frequency of the oscillation circuit is a measure for the physical...

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Bibliographische Detailangaben
Hauptverfasser:	LEGRAN, PETER, FRANKE, KARL-HEINZ, SCHROEDER, JOACHIM, REULE, ALFRED
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS MEASURING MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR MEASURING QUANTITY OF HEAT MEASURING TEMPERATURE PHYSICS TARIFF METERING APPARATUS TESTING THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:	In a fibre optical sensor with a fluorescent substance of fluorescence decay time dependent on a physical parameter, in which the fluorescent radiation is back coupled to the incident radiation, in an oscillation circuit, so that the frequency of the oscillation circuit is a measure for the physical parameter, the novelty is that back coupling of the fluorescent signal is effected by an oscillator (16a) controlled by a fluorescent signal decay time evaluation system, pref. a phase-controlled rectifier (15b) and an integrator (15c).