[특허]Method of identifying a gas and associated apparatus

[미국특허] Method of identifying a gas and associated apparatus 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G07N-027/404 G07N-027/30
출원번호	US-0986306 (2001-11-08)
발명자 / 주소	P. Richard Warburton
출원인 / 주소	Industrial Scientific Corporation
대리인 / 주소	Dennison, Schultz & Dougherty
인용정보	피인용 횟수 : 11 인용 특허 : 8

초록 ▼

A method for identifying an unknown gas using a diffusion limited sensor providing an electrical signal output when exposed to the gas. According to the method, a sensor is disposed in a chamber of fixed volume and having a gas input and gas output through which the gas flows, and the chamber is connected to a source of a known test gas of known concentration and known diffusion coefficient Dk. The input to the chamber is opened, causing the sensor to be exposed to the known test gas until a steady state electrical signal output from the sensor is obtained. The time Tk necessary for the sensor to attain a predetermined percentage of the steady state output is determined. The chamber is then connected to a source of unknown gas, and the input is opened, and time Tu necessary for the sensor to attain the predetermined percentage of a steady state output for the unknown gas is determined. The diffusion coefficient Du for the unknown gas is calculated by the formula Du=Dk.times.(Tk/Tu); and the unknown gas is identified by its calculated diffusion coefficient.

대표청구항 ▼

1. A method for identifying an unknown gas using a diffusion limited sensor providing an electrical signal output when exposed to the gas, comprising the steps of:disposing the sensor in a chamber of fixed volume and having a gas input and gas output through which the gas flows; connecting the chamber to a source of a known test gas of known concentration and known diffusion coefficient Dk, opening the input to the chamber, and causing the sensor to be exposed to the known test gas until a steady state electrical signal output from the sensor is obtained; determining the time Tk necessary for the sensor to attain a predetermined percentage of the steady state output; closing the input to the chamber and disconnecting the chamber from the source of the known test gas; connecting the chamber to a source of said unknown gas; opening the input to the chamber and determining the time Tu necessary for the sensor to attain said predetermined percentage of a steady state output for the unknown gas; calculating a diffusion coefficient Du for the unknown gas by the formula Du=Dk.times.(Tk/Tu); and identifying the unknown gas by its calculated diffusion coefficient.

이 특허에 인용된 특허 (8) 인용/피인용 타임라인 분석

Tantram Anthony D. S. (Great Bookham GBX) Gilbey Jonathon H. (Maidstone GBX), Gas calibration method and apparatus.
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Capetanopoulos Constantine Dean, Gas sensors and method of using same.
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Matthiessen Hans (Gross Parin DEX), Gas-sensing apparatus.
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Jung Min Lee KR; Choong Kyun Yeom KR; Chul Ung Kim KR; Beom Sik Kim KR; Kwang Joo Kim KR, Method and apparatus for on-line measurement of the permeation characteristics of a permeant through dense nonporous membrane.
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Warburton P. Richard, Method of identifying a gas.
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Weir Donald James,CHX ; Freeman Neville John,GBX ; May Iain Peter,GBX, Method of identifying analytes.
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Logothetis Eleftherios M. ; Hurley Michael D. ; Soltis Richard E., Method of introducing selectivity to nonselective gas sensors.
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Williams David Edward,GBX, Monitoring of multiple-electrode gas sensors.
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이 특허를 인용한 특허 (11) 인용/피인용 타임라인 분석

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Seto, Yasuo; Ohsawa, Isaac; Sekiguchi, Hiroshi; Maruko, Hisashi; Takada, Yasuaki; Okumura, Akihiko; Okada, Hidehiro; Nagano, Hisashi; Waki, Izumi, Gas monitoring apparatus and gas monitoring method.
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Stephenson, William B.; Stephenson, Craig W., Gas tester.
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Zimmermann, Bernd D.; Khadkikar, Prasad S.; Bostic, Lance A., Method and apparatus for the detection of the response of a sensing device.
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Gryska, Stefan H.; Palazzotto, Michael C.; Maanum, Derek M.; Kang, Myungchan, Method for identification and quantitative determination of an unknown organic compound in a gaseous medium.
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Kang, Myungchan; Palazzotto, Michael C.; Gryska, Stefan H., Method of detecting volatile organic compounds.
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Palazzotto, Michael C.; Gryska, Stefan H.; Kang, Myungchan; Wendland, Michael S., Method of using an absorptive sensor element.
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Hodgkinson,Elizabeth Jane, Non-dispersive ir measurement of gases using an optical filter.
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Palazzotto, Michael C.; Tungjunyatham, Justin; Gryska, Stefan H.; Wendland, Michael S., Vapor sensor including sensor element with integral heating.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Method of identifying a gas and associated apparatus 원문보기