초록 ▼

A fuel gauging system for use in determining the level of fuel in a tank. The system incorporates a resonant circuit for measuring the resonant frequency of at least one probe immersed in the fuel located in the tank. From measurements of variations of the frequency of resonance, the level of liquid

A fuel gauging system for use in determining the level of fuel in a tank. The system incorporates a resonant circuit for measuring the resonant frequency of at least one probe immersed in the fuel located in the tank. From measurements of variations of the frequency of resonance, the level of liquid in the tank is determined, and the fuel quantity is then calculated and displayed.

대표청구항 ▼

Apparatus for measuring the level of a liquid in a tank comprising: a plurality of probes disposed in the tank for at least partial immersion in the liquid; means electrically coupled to each probe for providing a series LC resonant circuit defining a distinct resonant frequency, said resonant frequ

Apparatus for measuring the level of a liquid in a tank comprising: a plurality of probes disposed in the tank for at least partial immersion in the liquid; means electrically coupled to each probe for providing a series LC resonant circuit defining a distinct resonant frequency, said resonant frequency being a function of the level of immersion of the probe in the liquid; means connecting said series LC resonant circuits in electrical parallel relation, said LC resonant circuits being operable in ranges of resonance which do not overlap one another; a generator for applying electrical input signals at selected ones of different frequencies to said probe resonant circuits; means for determining said probe resonant frequencies; and means electrically coupled to said probe resonant frequency determining means for comparing stored resonant frequencies with known liquid levels and computing and displaying the quantity of said liquid in said tank; whereby the quantity of liquid in the tank can be determined from said resonant frequency measurements.