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Gas sensor age compensation and failure detection

A technology for gas sensors and faults, applied in standard gas analyzers, analyzing gas mixtures, instruments, etc., can solve problems such as undetected target gas concentration, sensor failure, etc.

Inactive Publication Date: 2011-08-24
HAMILTON SUNDSTRAND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Further, the sensor may eventually fail, resulting in unacceptable concentrations of the target gas not being detected; this is especially problematic if the target gas is toxic

Method used

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  • Gas sensor age compensation and failure detection
  • Gas sensor age compensation and failure detection
  • Gas sensor age compensation and failure detection

Examples

Experimental program
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Embodiment Construction

[0017] Embodiments of systems and methods for gas sensor aging compensation and fault detection are provided herein, and illustrative examples are discussed in detail below. An aging compensation model for electrochemical gas sensors can be constructed by using sensor impedance spectroscopy data, and a compensation signal can be generated from the aging compensation model to automatically compensate for sensor drift due to aging. Imminent failure of the electrochemical gas sensor may also be automatically detected, thereby issuing a warning message before sensor failure actually occurs.

[0018] figure 1 An embodiment of a system 100 for gas sensor aging compensation and fault detection is illustrated. Sensor 101 may include any suitable gas sensor, including but not limited to carbon monoxide (CO) or hydrogen cyanide (HCN) sensors. The sensor 101 is in communication with a potentiostat 102 for collecting impedance data from the sensor 101 . The potentiostat 102 sends the c...

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PUM

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Abstract

The invention relates to gas sensor age compensation and failure detection. A method, system (100), and computer program product for age compensation for a gas sensor (101) are provided. The method includes determining an impedance spectrum for the gas sensor (101) by an impedance analyzer (103); determining a set of principle parameters based on the impedance spectrum by a principle parameter identifier (104); constructing an age compensation model for the gas sensor (101) using the set of principle parameters by an age compensation modeler (105); and applying the age compensation model to an output of the gas sensor (101). Gas sensor (101) failure detection is also provided.

Description

[0001] Federal Research Statement [0002] This invention was made with Government support under Government Contract No. NNJ06TA25C awarded by the National Aeronautics and Space Administration (NASA). The government has certain rights in this invention. technical field [0003] The subject matter disclosed herein relates generally to the field of gas sensor monitoring. Background technique [0004] Electrochemical gas sensors may include amperometric sensors that include a working (or sensing) electrode, a counter electrode, and an electrolyte. The sensor may also include a reference electrode. Electrochemical gas sensors include an electrochemical cell having electrodes and an electrolyte. In operation, a target gas (ie, the gas that the electrochemical gas sensor is designed to detect) reacts with the surface of the sensing electrode, generating a current proportional to the gas concentration through the surface reaction. The current can be measured to determine the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02G01N27/413
CPCG01N27/02G01N27/4163G01N33/0006G01N27/026
Inventor Y·娄
Owner HAMILTON SUNDSTRAND CORP