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公开(公告)号：US09933326B2
公开(公告)日：2018-04-03
申请号：US15215706
申请日：2016-07-21
发明人： Zachary Parker , Mark C. Hawkins
CPC分类号： G01M3/20 , B05B1/24 , F24F6/08 , F41H9/06 , G01M3/04 , G01M3/042 , G01M3/226 , G01M3/28 , G01N27/26
摘要： A universal leak detection method for detecting both small and large leaks. The method includes the steps of: injecting smoke and a detectable gas into a fluid system to pressurize the fluid system, the smoke and detectable gas both being capable of passing through a large leak in the fluid system, and the visual smoke particles being inhibited from passing through a small leak in the fluid system and the detectable gas being capable of passing through a small leak in the fluid system; and detecting a leak by detecting at least one of the smoke and the detectable gas, wherein detection of smoke is indicative of the fluid system having a large leak and detection of detectable gas without smoke.
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公开(公告)号：US09863838B2
公开(公告)日：2018-01-09
申请号：US15002061
申请日：2016-01-20
发明人： Chunhai Liu , Zhigao Yin , Debin Tang , Jinqi Lv , Zhipeng Li , Aiguo Zhang , Zhihua Zhu , Yongning Wang , Changhai Li
CPC分类号： G01M3/329
摘要： The present invention provides an air tightness detection device for an aluminum alloy wheel hub, which is characterized by precision air pressure sensors, a lower clamp, a cone cylinder pressure plate, air pipes, a pressure plate, guide posts, an air inlet pipe, and a compressed gas control and detection system. A technical solution of the present invention has the following advantages that the cone cylinder pressure plate of the detection device reduces the space of an inner cavity of the wheel hub to further reduce inflating volume, thereby increasing detection efficiency; the characteristics of readily availability for preparation, no pollution and low cost are achieved by taking compressed air as a leakage indication gas.
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公开(公告)号：US09841345B2
公开(公告)日：2017-12-12
申请号：US14416432
申请日：2013-07-23
摘要： The invention concerns a detection method for checking sealed product packages for leaks, characterized in that it comprises the following steps: at least one previously sealed product (2) is placed in an air, nitrogen, or oxygen atmosphere, in a chamber (3) (step 101), the pressure in the chamber (3) is lowered to a secondary vacuum pressure below 10−1 mbar and, while continuing the secondary vacuum pumping of the chamber (3), the gases contained in the chamber are ionized to monitor the change in the chamber (3) of the concentration of at least one gaseous species of the gas volume contained within the sealed product (2) chosen from among nitrogen, oxygen, or argon, by analysis by optical emission or mass spectrometry (step 102).
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公开(公告)号：US09823231B1
公开(公告)日：2017-11-21
申请号：US14319236
申请日：2014-06-30
申请人： Picarro Inc.
发明人： David Steele , Sze M. Tan
IPC分类号： G01N33/00 , G01M3/04 , G01M3/22 , G01N21/3504
CPC分类号： G01N33/0062 , G01M3/04 , G01M3/22 , G01N21/3504 , G01N33/0004 , G01N33/0009
摘要： In some embodiments, vehicle-based natural gas leak detection methods include assembling a collection of measured concentration peaks originating from a common natural gas leak according to wind direction, wind variability and inter-peak distance data, and selecting from the collection a subset of one or more representative peaks for display. Assigning peaks to a collection may be performed according to a peak overlap condition dependent upon a scaling (overlap) factor which scales the spatial reach of a peak, and according to a wind condition which determines whether a downwind event points toward an upwind event. The scaling factor may depend on wind variability and on an orientation of an inter-peak vector relative to a representative wind direction. Peak filtering is particularly useful in urban environments, where buildings channel gas plumes and one leak may lead to sequential detections of multiple concentration peaks along a path.
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公开(公告)号：US09816894B2
公开(公告)日：2017-11-14
申请号：US14484836
申请日：2014-09-12
申请人： Loren Wilcox , Matt Murdock
发明人： Loren Wilcox , Matt Murdock
CPC分类号： G01M3/04 , G01M3/22 , Y10T29/49117
摘要： A gas monitoring system for continuously detecting leakage of at least one gas and being operable in an extreme climate condition, the system involving a processor; at least one emergency shutdown valve responsive to a set of instructions from the processor; and a user interface in communication with the processor. The system further involves a weather-proof enclosure for housing system components. The weather-proof enclosure is adapted to operate at a temperature range of ambient temperature to a below-freezing temperature, wherein the at least one emergency shutdown valve comprises at least one latch valve.
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公开(公告)号：US09816892B2
公开(公告)日：2017-11-14
申请号：US14995429
申请日：2016-01-14
申请人： The Boeing Company
发明人： Keith D. Humfeld , Morteza Safai
摘要： In one aspect, systems for detecting a fuel leak are described herein. In some implementations, a system for detecting a fuel leak described herein comprises a fuel-containing vessel having an exterior surface and a carbon nanotube coating layer comprising photoluminescent carbon nanotubes disposed on at least a portion of the exterior surface of the fuel-containing vessel. The system further comprises a fuel-sensitive coating layer substantially covering the carbon nanotube coating layer. The fuel-sensitive coating layer is optically opaque or substantially opaque to wavelengths of light absorbed and/or emitted by the photoluminescent carbon nanotubes.
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公开(公告)号：US20170284889A1
公开(公告)日：2017-10-05
申请号：US15508723
申请日：2015-09-01
摘要： A method for checking a connection seal between two elements of a part, includes dipping the part to be checked in a penetrant having a compound suitable for reacting to light excitation; cutting the part at the connection to be checked; and checking for the presence of penetrant under a light capable of exciting the penetrant.
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公开(公告)号：US09759630B2
公开(公告)日：2017-09-12
申请号：US15263455
申请日：2016-09-13
CPC分类号： G01M3/20 , G01M3/002 , G01M3/228 , G01M3/38 , G01N21/3504 , G01N25/72 , G01N33/004
摘要： A system for detecting a gas leak in a generator includes a source of carbon dioxide gas, and a subsystem for introducing the carbon dioxide gas into the generator. An infrared imaging device is adapted to communicate with a notification device to display an image of at least a portion of the generator and the carbon dioxide gas. The infrared imaging device is a cooled detector and a filter with a spectral response between about 3 μm and about 5 μm. At least one of the detector and the filter is cooled to between about −80° C. and about −200° C. The gas leak will be indicated on the notification device.
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公开(公告)号：US20170205306A1
公开(公告)日：2017-07-20
申请号：US14995429
申请日：2016-01-14
申请人： The Boeing Company
发明人： Keith D. Humfeld , Morteza Safai
摘要： In one aspect, systems for detecting a fuel leak are described herein. In some implementations, a system for detecting a fuel leak described herein comprises a fuel-containing vessel having an exterior surface and a carbon nanotube coating layer comprising photoluminescent carbon nanotubes disposed on at least a portion of the exterior surface of the fuel-containing vessel. The system further comprises a fuel-sensitive coating layer substantially covering the carbon nanotube coating layer. The fuel-sensitive coating layer is optically opaque or substantially opaque to wavelengths of light absorbed and/or emitted by the photoluminescent carbon nanotubes.
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公开(公告)号：US20170167944A1
公开(公告)日：2017-06-15
申请号：US14757265
申请日：2015-12-10
申请人： Steve Lenart
发明人： Steve Lenart
IPC分类号： G01M3/22
摘要： An underwater drain leakage detection apparatus for a swimming pool is provided including an elongated pole and a housing connected to one end of the pole. A flexible leak detection tube is connected to the housing at a first end thereof and is in liquid communication with the inside of the housing. The housing is positioned over a suspected leak area below the surface of the water in the pool by suitable manipulation of the elongated pole by the pool leak specialist. A suitable dye substance then is inserted into the distal top or free end of the leak detection tube while the latter is positioned just below the surface of the swimming pool water by the leak specialist. The dye is observed from above the surface of the swimming pool water to determine whether there is a leak. If there is a leak in the area of the pool covered by the housing, the dye easily will be observed to move downward along the tube.
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