Method and apparatus for determining a fluid level in the vicinity of a transmission line

A method and apparatus for detecting fluid level in a tank in the vicinity of a transmission line (1), the fluid level being such as to cause reflection of a signal transmitted along the transmission line. The method includes the steps of: a) transmitting a signal along the transmission line; b) mon...

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Bibliographische Detailangaben
Hauptverfasser:	OSWALD, GORDON K. A, LAWRENCE, THOMAS W. J, UISI, PER A. V, ORME, ELIZABETH A
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES BASIC ELECTRONIC CIRCUITRY DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRICITY LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL METERING BY VOLUME PHYSICS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	A method and apparatus for detecting fluid level in a tank in the vicinity of a transmission line (1), the fluid level being such as to cause reflection of a signal transmitted along the transmission line. The method includes the steps of: a) transmitting a signal along the transmission line; b) monitoring the transmission line for any reflections of the signal; c) generating an analysis window of time (t1, t2, t3) if the magnitude of a given characteristic of the reflected signal is greater than a predetermined threshold value; and d) analyzing the reflected signal received during the period of an analysis window to provide the required information on the fluid level.