[특허]Gas visualizing apparatus and method for detecting gas leakage from tanks or piping

[미국특허] Gas visualizing apparatus and method for detecting gas leakage from tanks or piping 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01N-021/35
출원번호	US-0228146 (1994-04-15)
우선권정보	JP-0260113 (1991-10-08); JP-0260114 (1991-10-08)
발명자 / 주소	Sato Tominori (Osaka JPX) Kanagawa Toshihide (Osaka JPX) Sumida Koichi (Osaka JPX) Nishio Takeshi (Osaka JPX)
출원인 / 주소	Osaka Gas Co., Ltd. (Osaka JPX 03)
인용정보	피인용 횟수 : 52 인용 특허 : 0

초록 ▼

A gas visualizing apparatus includes an image sensor for detecting infrared light radiated or reflected from a background of a gas leak monitoring territory A, a laser source for emitting a detection infrared beam in two-dimensional form toward the gas leak monitoring territory A, the detection infrared beam having a wavelength absorbable by a gas “g”to be detected and a CRT for displaying information relating to gas leakage as a two-dimensional visible image corresponding to the gas leak monitoring territory A. The laser source includes a beam expander for converging or diverging the detection infrared beam to vary an area of the gas leak monitoring territory A. The image sensor includes a transmission and width varying device for setting the infrared light entering the image sensor to a band substantially centering on the wavelength of the detection infrared beam, and varying a width of the band, to realize an excellent visible image.

대표청구항 ▼

A gas visualizing apparatus comprising: planar infrared detecting means for detecting infrared light radiated or reflected from a background of a gas leak monitoring territory; planar infrared emitting means for emitting a detection infrared beam in two-dimensional form toward said gas leak monitoring territory, said detection infrared beam having a wavelength absorbable by a gas to be detected; display means for displaying information relating to gas leakage as a two-dimensional visible image corresponding to said gas leak monitoring territory; said planar infrared emitting means including irradiated area varying means for converging or diverging said detection infrared beam to vary an area of said gas leakage monitoring territory; said planar infrared detecting means including transmission bandwidth varying means for setting a band of said infrared light incident to said planar infrared detecting means to a band which includes at least a portion of an absorption band substantially centering on the wavelength of said detection infrared beam where infrared light of this band is absorbed in said gas, said transmission bandwidth varying means also varying a width of said incident band so as to vary a ratio between an amount of information relating to said gas and an amount of information relating to said background within said incident band; and monitor mode switching means for switching between a passive mode in which only said planar infrared detecting means is operated to detect the infrared light radiated from the background of said gas leak monitoring territory detection information thereby obtained being displayed on said display means as the information relating to gas leakage, and an active mode in which both said planar infrared emitting means and said planar infrared detecting means are operated, detection information thereby obtained being displayed on said display means as the information relating to gas leakage.

이 특허를 인용한 특허 (52) 인용/피인용 타임라인 분석

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[미국특허] Gas visualizing apparatus and method for detecting gas leakage from tanks or piping 원문보기

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[미국특허] Gas visualizing apparatus and method for detecting gas leakage from tanks or piping 원문보기

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