Liquid level and quality sensing apparatus, systems and methods using emf wave propagation

A technology of liquids and properties, applied in the field of liquid level, composition and pollution, can solve the problem of unpractical fuel tank

Inactive Publication Date: 2012-11-28
SCHRADER ELECTRONICS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Repair, replacement, or adjustment of internal fuel level gauging mechanisms is problematic, and the use of such internal fuel level gauging mechanisms, due to the relatively greater corrosive nature of urea or alcohol, is problematic in urea tanks and / or flex fuel vehicles probably not practical in the fuel tank

Method used

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  • Liquid level and quality sensing apparatus, systems and methods using emf wave propagation
  • Liquid level and quality sensing apparatus, systems and methods using emf wave propagation
  • Liquid level and quality sensing apparatus, systems and methods using emf wave propagation

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Embodiment Construction

[0042] The present systems and methods are capable of determining the type of liquid in a container, particularly if the liquid is substantially water and are not limited to the examples used in this specification. In the embodiment shown and described, the present system can provide this information to the vehicle EMS, which can use this information to prevent SCR vehicles with water, etc. in the urea tank, from operating in accordance with the vehicle manufacturer's recommended AUS improper operation and use this information to monitor the liquid level and / or urea concentration in the tank.

[0043] figure 1 An embodiment of the AUS monitoring device 100 of the present invention is drawn, the device 100 is arranged together with the urea tank 102, eg the AUS monitoring device is installed outside the urea tank. Various embodiments call for mounting the AUS monitoring device of the present invention on the outside or bottom of the tank. The urea tank 102 may be made of a no...

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Abstract

A liquid level, composition and contamination sensor generates an RF signal across a resonant circuit that includes a variable inductor and capacitor. The resulting electromagnetic radiation is propagated into the liquid and changes in impedance and resonance of the resonant circuit that result from changes in the conductivity and dielectric properties of the liquid, which are proportional to liquid content and volume, are detected. The conductivity and dielectric properties of the liquid are measured, based on the changed impedance and resonance of the resonant circuit, and are compared to determine aging and contamination of the urea solution by other liquids. Also, an optical sensor may be submerged in the liquid to determine the refractive index of the liquid. The refractive index of the liquid may be used to determine: if the liquid is water or a urea solution; the concentration of a urea solution.

Description

[0001] Cross Reference Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application No. 61 / 269,648, filed June 26, 2009, and entitled Liquid Level, Composition and Contamination Sensing Apparatus, Systems and Methods Using EMF Wave Propagation, which is incorporated by reference in this article. technical field [0003] The present invention generally relates to systems and methods for sensing the state of liquids in tanks or containers. In particular, embodiments of the present invention relate to sensing characteristics of an automotive urea solution in an automotive urea tank, components of fuel oil in a fuel tank, and / or the like, especially liquid levels, components, etc., by propagating electromagnetic waves into the fuel tank. points and pollution. Background technique [0004] Selective Catalytic Reduction (SRC (Selective Catalytic Reduction)) vehicles, also known as Euro V vehicles, are diesel-powered vehicles whose engi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/26G01N27/22G01N33/22F01N3/20B01D53/86G01R27/26G01N27/06
CPCF01N11/00F01N2900/1811Y02T10/47F01N2560/12G01N27/02Y02T10/24F01N2610/02F01N2550/05F01N2900/1814G01N33/2852F01N3/2066F01N2900/1818G01N33/2847F01N2610/1406G01F23/2922G01N21/41G01N21/8507Y02T10/12Y02T10/40G01F23/26G01N27/22G01N33/22F01N3/20
Inventor A·K·麦卡尔I·布达乌德
Owner SCHRADER ELECTRONICS LTD
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