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Nitrogen oxide sensor

A nitrogen oxide and sensor technology, applied in instruments, scientific instruments, measuring devices, etc., can solve the problems of short service life and low production pass rate of nitrogen oxide sensors.

Active Publication Date: 2021-07-06
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The main purpose of the present invention is to propose a nitrogen oxide sensor, which aims to solve the technical problems of low production pass rate and short service life of nitrogen oxide sensors in the prior art

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Embodiment Construction

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0023] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second" and ...

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Abstract

The invention discloses a nitrogen oxide sensor which comprises a first structural layer with the same thickness as a second structural layer, and the first structural layer and the second structural layer are symmetrically arranged relative to a solid electrolyte layer group; a common electrode is arranged on the side, facing the first structural layer, of the first solid electrolyte layer, and a first main pump electrode and a first auxiliary pump electrode are arranged on the side, facing the second solid electrolyte layer, of the first solid electrolyte layer. A second main pump electrode, a second auxiliary pump electrode and a measuring pump electrode are arranged on the side, facing the first solid electrolyte layer, of the second solid electrolyte layer, a reference electrode is arranged on the side, facing the third solid electrolyte layer, of the second solid electrolyte layer, and a heater is arranged on the side, facing the second structural layer, of the third solid electrolyte layer. According to the nitrogen oxide sensor, the power consumption of the nitrogen oxide sensor in a working state is reduced, the service life of the nitrogen oxide sensor can be prolonged, and meanwhile, the firing qualification rate is improved.

Description

technical field [0001] The invention relates to the technical field of gas sensors, in particular to a nitrogen oxide sensor. Background technique [0002] Nitrogen oxide sensor is an important part of automobile exhaust monitoring and emission control system, mainly used for real-time and accurate measurement of nitrogen oxide concentration in automobile exhaust. At present, the NOX sensor widely used in the automobile market is manufactured by Japan NGK Company. The sensor is composed of yttrium oxide stabilized zirconia (YSZ) ceramics, which generally includes four chambers (see patent documents: US09631999B2, US09927413B2, EP0878709A2), respectively The atmosphere buffer chamber to be tested, the first chamber, the second chamber and the third chamber. For existing nitrogen oxide sensors (patent documents: US09631999B2, US09927413B2, EP0878709A2), due to the existence of structures such as these chambers and working electrodes, the nitrogen oxide sensor presents a very ...

Claims

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Application Information

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IPC IPC(8): G01N27/419
CPCG01N27/419
Inventor 占忠亮仝永成陈初升
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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