Turbidity sensor

A turbidity sensor and turbidity technology, which is applied in the field of turbidity sensor and measurement of liquid turbidity, can solve problems such as difficult detection, signal flooding, and failure

Inactive Publication Date: 2011-10-19
ELECTROLUX HOME PROD CORP NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conversely, if the intensity is below the sensitivity threshold of the photosensitive element, the signal may be swamped by noise and may therefore not, or at least be difficult, to be detected
Therefore, it is self-evident that existing turbidity sensors have certain limitations

Method used

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Embodiment Construction

[0056] The present invention will now be described in more detail with reference to the accompanying drawings, which illustrate certain embodiments of the invention. The invention, however, may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example, and will fully convey the scope of the present invention to those skilled in the art. Furthermore, like numerals refer to like elements throughout.

[0057] According to an exemplary embodiment of the present invention, figure 2 A sensor 200 for measuring the turbidity of a fluid 240 is shown. The sensor 200 according to this exemplary embodiment, shown in block diagram form in the figure, includes a light emitting portion 210 , a light receiving portion 220 , and a processing and control portion 230 . The light emitting portion 210 and the light receiving portion 220 are arranged so that at least a substantial port...

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Abstract

A turbidity sensor for use in a machine for washing articles, e.g., a washing machine (400). The turbidity sensor comprises a light source (210) for emitting light. The emitted light has a radiant intensity which is variable. The sensor further comprises a light-sensitive element (220) for receiving light emitted from the light source (210). The light source (211) and the light- sensitive element(220) are positioned relative to each other so that, when the light source (210) is in operation, light emitted from the light source (210) can propagate through a washing liquid contained in the washing machine (400) on its way to the light sensitive element (220). The light-sensitive element (220) is configured to measure the radiant intensity of light received at the light-sensitive element (221). Furthermore, the sensor comprises a controller (230) which is communicatively coupled to the light source (210) and the light- sensitive element (220). The controller (230) is configured to adjust the radiant intensity of the light emitted by the light source (210) in dependence of the measured radiant intensity of light received at the light-sensitive element (220).

Description

technical field [0001] The present invention generally relates to turbidity sensors and methods of measuring the turbidity of liquids. More particularly, it relates to turbidity sensors used in machines for washing items (eg, dishwashers or washing machines). Background technique [0002] Today, appliances or machines for washing dishes or laundry in liquid media can be equipped with sensors for measuring turbidity. Refrigerators with beverage preparation systems can also be equipped with sensors for measuring turbidity. The term "turbidity" as used herein generally refers to the concentration of light scattering or light absorbing particles suspended in a liquid medium. As the turbidity in the fluid increases, the transmittance generally decreases for a given wavelength, which is related, for example, to: [0003] ●Wavelength [0004] ●Diameter distribution of suspended particles [0005] the refractive index of suspended particles, and [0006] ●The surface propertie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06F39/00A47L15/42
CPCA47L15/4297D06F34/22D06F2103/20D06F2105/56D06F2105/58G01N15/06G01N21/534G01N21/8507
Inventor 吉里什·皮穆普特卡佩尔-埃里克·佩尔斯
Owner ELECTROLUX HOME PROD CORP NV
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