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Semiconductor chemical sensor

A chemical sensor and semiconductor technology, applied in the field of chemical sensors, can solve problems such as high cost and difficult production

Inactive Publication Date: 2007-01-17
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, the device of the '360 publication does not include means to control the temperature of the device when used in an environment of relatively rapidly changing and difficult-to-control environmental conditions, which would be present in an engine exhaust stream
Furthermore, the device of the '360 publication can be difficult and costly to produce

Method used

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  • Semiconductor chemical sensor
  • Semiconductor chemical sensor
  • Semiconductor chemical sensor

Examples

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Embodiment Construction

[0014] figure 1 An exhaust system 10 is shown including an exhaust monitoring system 12 according to one exemplary disclosed embodiment. Exhaust system 10 includes an engine 14 configured to supply an exhaust flow 16 to an exhaust conduit 18 . Exhaust conduit 18 may include a number of additional exhaust system components 20 , 22 , such as one or more catalysts, filters, exhaust system burners, oxygen sensors, additional supply systems, and any other suitable exhaust system components.

[0015] As shown, exhaust system 10 is an engine exhaust system as may be found on diesel trucks. However, exhaust system 10 may also include any suitable exhaust system. For example, exhaust system 10 may include an engine exhaust system for any suitable work machine, such as a crane, dump truck, bulldozer, ocean going vessel, generator set, or any other suitable machine. In addition, the exhaust system 10 may include exhaust ducts for any other industrial machinery or workplace, such as fo...

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Abstract

A chemical sensor is provided that includes a semiconductor layer, an organic chemical layer disposed on a surface of the semiconductor layer, and a heating element configured to heat the semiconductor layer.

Description

technical field [0001] The present invention relates generally to chemical sensors, and more particularly to functionalized semiconductor sensors. Background technique [0002] Chemical sensors have numerous uses. For example, certain chemical sensors can quickly and effectively identify or measure ambient gases for medical diagnosis and monitoring, or to detect dangerous states. Additionally, certain chemical sensors can be used to monitor reaction products, including certain engine exhaust emissions. Monitoring of engine exhaust emissions can improve control of engine operating parameters to reduce emissions of certain harmful chemicals or to improve machine performance. [0003] Many types of chemical sensors are available. Such sensors may include, for example, functionalized electrical or optical materials. These functionalized materials have an organic dye layer placed on the surface of an electrically or photoactive material. The organic dye layer can be selected...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00G01N27/12
CPCG01N27/12
Inventor S·M·泽姆斯科瓦C·F·哈贝格
Owner CATERPILLAR INC
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