LIQUID SURFACE DETECTION SENSOR

PROBLEM TO BE SOLVED: To provide a liquid surface detection sensor which is simple in electrode structure and easily mounted in a liquid storage tank and realizes a circuit arrangement with a simple constitution for detecting the liquid surface position. SOLUTION: The liquid level in a fuel tank 1 c...

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Bibliographic Details
Main Authors SHINODA KATSUNORI, SETO HISAO
Format Patent
LanguageEnglish
Published 26.02.2003
Edition7
Subjects
ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES
ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES
ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES
AUXILIARY DRIVES FOR VEHICLES
INSTRUMENTATION OR DASHBOARDS FOR VEHICLES
MEASURING
MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL
METERING BY VOLUME
PERFORMING OPERATIONS
PHYSICS
TESTING
TRANSPORTING
VEHICLES IN GENERAL
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Summary:PROBLEM TO BE SOLVED: To provide a liquid surface detection sensor which is simple in electrode structure and easily mounted in a liquid storage tank and realizes a circuit arrangement with a simple constitution for detecting the liquid surface position. SOLUTION: The liquid level in a fuel tank 1 changes the impedance (capacitance) Z between measuring electrodes 2A, 2B, and this changes the value of a current flowing between the electrodes 2A, 2B to change the voltage level on an amplification output of an AC amplifier 5 according to the change. This output is synchronously detected to change a DC-amplified signal level, and an arithmetic processor 9 determines and detects the present liquid level position from the varying signal level and obtains a remaining quantity of fuel in the tank 1 from the determining and detection result to indicate the remaining quantity on an indicator 10.
Bibliography:Application Number: JP20010244630