I lllll llllllll Ill lllll lllll lllll lllll lllll 111111111111111111111111111111111
`US008426813B2
`
`c12) United States Patent
`Furry
`
`(10) Patent No.:
`(45) Date of Patent:
`
`US 8,426,813 B2
`*Apr. 23, 2013
`
`(54) CHEMICAL LEAK INSPECTION SYSTEM
`
`(56)
`
`References Cited
`
`(75)
`
`Inventor: David W Furry, Blanket, TX (US)
`
`(73) Assignee: Leak Surveys, Inc., Early, TX (US)
`
`( *) Notice:
`
`Subject to any disclaimer, the term of this
`patent is extended or adjusted under 35
`U.S.C. 154(b) by 0 days.
`
`This patent is subject to a terminal dis(cid:173)
`claimer.
`
`EP
`EP
`
`(21) Appl. No.: 13/462,609
`
`(22) Filed:
`
`May2, 2012
`
`(65)
`
`Prior Publication Data
`
`US 2012/0273680Al
`
`Nov. 1, 2012
`
`Related U.S. Application Data
`
`(63) Continuation of application No. 11/298,862, filed on
`Dec. 10, 2005, now Pat. No. 8,193,496, which is a
`continuation of application No. PCT /US2004/012946,
`filed on Apr. 26, 2004.
`
`(60) Provisional application No. 60/477,994, filed on Jun.
`11, 2003, provisional application No. 60/482,070,
`filed on Jun. 23, 2003, provisional application No.
`60/540,679, filed on Jan. 30, 2004.
`
`(51)
`
`(2006.01)
`
`Int. Cl.
`GOJJS/02
`(52) U.S. Cl.
`USPC ...................................... 250/330; 250/339.03
`( 58) Field of Classification Search . ... ... ... ... .. ... 250/330,
`250/339.03
`See application file for complete search history.
`
`U.S. PATENT DOCUMENTS
`3,032,655 A
`511962 Romans et al.
`5/1972 Brengman et al.
`3,662,171 A
`4,158,133 A *
`611979 Spaeth et al.
`(Continued)
`
`250/214 R
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`OTHER PUBLICATIONS
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`Hinnrichs, M., "Hand Held Imaging Spectrometer," Proceedings of
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`2002), IEEE Computer Society, USA.
`
`(Continued)
`Primary Examiner - David Porta
`Assistant Examiner - Shun Lee
`(74) Attorney, Agent, or Firm - Chamberlain Hrdlicka
`ABSTRACT
`(57)
`A method of visually detecting a leak of a chemical emanat(cid:173)
`ing from a component includes aiming a passive infrared
`camera system towards the component; filtering an infrared
`image with an optical bandpass filter, the infrared image
`being that of the leak; afterthe infrared image passes through
`the lens and optical bandpass filter, receiving the filtered
`infrared image with an infrared sensor device; electronically
`processing the filtered infrared image received by the infrared
`sensor device to provide a visible image representing the
`filtered infrared image; and visually identifying the leak
`based on the visible image. The passive infrared camera sys(cid:173)
`tem includes: a lens; a refrigerated portion including the
`infrared sensor device and the optical bandpass filter (located
`along an optical path between the lens and the infrared sensor
`device). At least part of a pass band for the optical bandpass
`filter is within an absorption band for the chemical.
`58 Claims, 31 Drawing Sheets
`
`38
`
`40
`
`22
`
`FLIR Systems, Inc.
`1001-00001
`
`

`

`US 8,426,813 B2
`Page 2
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`PDF on Internet, (Oct. 10, 2000), <http://london.hetek.com/pdfs/gas/
`Optical%20Methane%20Detector.pdf>, Scotland.
`
`FLIR Systems, Inc.
`1001-00002
`
`

`

`US 8,426,813 B2
`Page 3
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`* cited by examiner
`
`FLIR Systems, Inc.
`1001-00003
`
`

`

`U.S. Patent
`
`Apr. 23, 2013
`
`Sheet 1of31
`
`US 8,426,813 B2
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`
`FLIR Systems, Inc.
`1001-00004
`
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`U.S. Patent
`
`Apr. 23, 2013
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`Sheet 2 of 31
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`US 8,426,813 B2
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`U.S. Patent
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`Apr. 23, 2013
`
`Sheet 5 of 31
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`US 8,426,813 B2
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`% TRANSMISSION
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`- - - - - - PROPYLENE
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`FIG. 8
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`UNITS
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`0.0012
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`ARBITRARY
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`0.00020
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`100
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`

`

`U.S. Patent
`
`Apr. 23, 2013
`
`Sheet 11of31
`
`US 8,426,813 B2
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`FLIR Systems, Inc.
`1001-00014
`
`

`

`ARBITRARY
`ABSORPTION
`UNITS
`0.00090
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`% TRANSMISSION
`(FILTER)
`100
`
`90
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`80
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`60
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`

`

`U.S. Patent
`
`Apr. 23, 2013
`
`Sheet 14 of 31
`
`US 8,426,813 B2
`
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`FLIR Systems, Inc.
`1001-00017
`
`

`

`U.S. Patent
`
`Apr. 23, 2013
`
`Sheet 15 of 31
`
`US 8,426,813 B2
`
`ARBITRARY
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`100
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`FIG. 19
`
`FLIR Systems, Inc.
`1001-00018
`
`

`

`- - - PROPYLENE
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`Apr. 23, 2013
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`Apr. 23, 2013
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`US 8,426,813 B2
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`1001-00021
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`U.S. Patent
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`Apr. 23, 2013
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`Sheet 19 of 31
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`U.S. Patent
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`Apr. 23, 2013
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`Sheet 20 of 31
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`US 8,426,813 B2
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`U.S. Patent
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`Apr. 23, 2013
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`Sheet 21 of 31
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`US 8,426,813 B2
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`

`U.S. Patent
`
`Apr. 23, 2013
`
`Sheet 27 of 31
`
`US 8,426,813 B2
`
`OBJECT
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`FLIR Systems, Inc.
`1001-00030
`
`

`

`U.S. Patent
`
`Apr. 23, 2013
`
`Sheet 28 of 31
`
`US 8,426,813 B2
`
`168
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