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Sensor element with improved air inlet

A technology of sensor elements and air intake holes, which is applied in the direction of instruments, scientific instruments, and material analysis through electromagnetic means, and can solve problems such as increasing diffusion resistance, blocking diffusion barriers, and fouling

Active Publication Date: 2011-09-14
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the spray angle, TSP can enter the intake openings, which can foul or even clog the diffusion barrier and can thus significantly increase the diffusion resistance

Method used

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  • Sensor element with improved air inlet
  • Sensor element with improved air inlet
  • Sensor element with improved air inlet

Examples

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Embodiment Construction

[0032] exist figure 1 A first exemplary embodiment of a sensor element 110 according to the invention is shown in . An exemplary embodiment of the production method according to the invention of such a sensor element 110 should also be explained with the aid of this schematic diagram. The sensor element 110 has a layer structure 112 which can be produced using ceramic thin-film methods and / or thick-film methods. Layer structure 112 includes a surface 116 facing measurement gas chamber 114 , on which surface 116 a first electrode 118 is arranged. exist figure 1 In the exemplary embodiment shown, the first electrode 118 can, for example, be configured as a ring, because figure 1 The sensor element 110 in may mostly have a rotationally symmetrical structure. However, other configurations are also conceivable. First electrode 118 is separated from measurement gas chamber 114 , for example, by a gas-permeable protective layer 120 . Furthermore, layer structure 112 has one or ...

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Abstract

The invention provides a sensor element with improved air inlet. The element (110) has an electrode (124) separated from a measurement gas chamber (114) by a layer of a laminated structure (112) and connected to the measurement gas chamber by a gas access path (128). The gas access path is provided with a gas passage opening (130) comprising two cylindrical or conical zones (148, 152) having different diameters. Maximum diameter of the gas passage opening is at a level of an upper surface (116) of the laminated structure. The electrode is placed in an electrode cavity (126). An independent claim is also included for a method for manufacturing a sensor element.

Description

technical field [0001] The invention relates to a sensor element with improved air intake. Background technique [0002] Sensor elements for detecting properties of a gas in a measurement gas chamber are known from the prior art, which sensor elements are based on the use of one or more solid electrolytes. A solid electrolyte is a solid, especially a ceramic solid, that is capable of conducting specific ion species such as oxygen ions. This characteristic usually occurs at an extreme temperature or above an extreme temperature range. Typical solid electrolytes are eg yttrium stabilized zirconia or other types of metal oxides, typically doped metal oxides. Such sensor elements are used, for example, to detect physical and / or chemical properties of the gas in the measurement gas chamber. A typical example is the qualitative and / or quantitative identification of at least one gas component in the gas of the measuring gas chamber. In particular, this gas component can be oxyg...

Claims

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Application Information

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IPC IPC(8): G01N27/406G01N27/403
CPCG01N27/4077
Inventor H·斯图德青斯基G·施奈德
Owner ROBERT BOSCH GMBH
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