Patents by Inventor Tianqing He
Tianqing He has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10509000Abstract: A handheld XRF device having a shutter including a calibration material. An automatic calibration sequence may be performed with the shutter in the closed position.Type: GrantFiled: May 19, 2016Date of Patent: December 17, 2019Assignee: Tribo LabsInventors: Tianqing He, Carlos Camara, Mark G. Valentine, Dan Cuadra, Eric W. Wong, German Om, Andy Kotowski, Justen Harper
-
Patent number: 9897707Abstract: A method for X-ray detection using a charge-integrating X-ray detector including a photodetector array of pixels, each of which converts incident radiation into accumulated charge during an X-ray exposure, is provided. The method includes, for each pixel, reading out the accumulated charge from the pixel and determining an X-ray charge value from the read out accumulated charge. If the X-ray charge value is less than a photon counting threshold, the X-ray charge value is replaced with a quantized charge value representative of an estimated photon count and recording the quantized charge value as a recorded charge value. If, however, the X-ray charge is equal to or greater than the photon counting threshold, the X-charge value is recorded as the recorded charge value. The method allows operating a charge-integrating X-ray detector in a mixed photon-counting/analog output mode.Type: GrantFiled: June 20, 2014Date of Patent: February 20, 2018Inventors: Roger D. Durst, Gregory A. Wachter, Tianqing He
-
Publication number: 20170284739Abstract: An apparatus and method for quickly drying porous materials. A sealable chamber is connected to a cold trap which is connected to a vacuum pump. A sample is placed inside the sealable chamber. The vacuum pump is turned on and air is evacuated through the cold trap to the vacuum pump. An infrared lamp may be used to heat the chamber and sample therein directly or heated air may be allowed to enter the sealable chamber. Air may be drawn directly from the sealable chamber to the vacuum pump bypassing the cold trap. Various parameters may be used to determine if the drying process is complete, including the degree of vacuum achieved in the chamber.Type: ApplicationFiled: June 19, 2017Publication date: October 5, 2017Inventors: Tianqing He, Ali Regimand, Lawrence H. James, Peter D. Muse
-
Patent number: 9702626Abstract: An apparatus and method for quickly drying porous materials. A sealable chamber is connected to a cold trap which is connected to a vacuum pump. A sample is placed inside the sealable chamber. The vacuum pump is turned on and air is evacuated through the cold trap to the vacuum pump. An infrared lamp may be used to heat the chamber and sample therein directly or heated air may be allowed to enter the sealable chamber. Air may be drawn directly from the sealable chamber to the vacuum pump bypassing the cold trap. Various parameters may be used to determine if the drying process is complete, including the degree of vacuum achieved in the chamber.Type: GrantFiled: August 29, 2014Date of Patent: July 11, 2017Assignee: InstroTek, Inc.Inventors: Tianqing He, Ali Regimand, Lawrence H. James, Peter D. Muse
-
Publication number: 20160341677Abstract: A handheld XRF device having a shutter including a calibration material. An automatic calibration sequence may be performed with the shutter in the closed position.Type: ApplicationFiled: May 19, 2016Publication date: November 24, 2016Inventors: Tianqing He, Carlos Camara, Mark G. Valentine, Dan Cuadra, Eric W. Wong, German Om, Andy Kotowski, Justen Harper
-
Publication number: 20150369929Abstract: A method for X-ray detection using a charge-integrating X-ray detector including a photodetector array of pixels, each of which converts incident radiation into accumulated charge during an X-ray exposure, is provided. The method includes, for each pixel, reading out the accumulated charge from the pixel and determining an X-ray charge value from the read out accumulated charge. If the X-ray charge value is less than a photon counting threshold, the X-ray charge value is replaced with a quantized charge value representative of an estimated photon count and recording the quantized charge value as a recorded charge value. If, however, the X-ray charge is equal to or greater than the photon counting threshold, the X-charge value is recorded as the recorded charge value. The method allows operating a charge-integrating X-ray detector in a mixed photon-counting/analog output mode.Type: ApplicationFiled: June 20, 2014Publication date: December 24, 2015Inventors: Roger D. DURST, Gregory A. WACHTER, Tianqing HE
-
Publication number: 20140366560Abstract: An apparatus and method for quickly drying porous materials. A sealable chamber is connected to a cold trap which is connected to a vacuum pump. A sample is placed inside the sealable chamber. The vacuum pump is turned on and air is evacuated through the cold trap to the vacuum pump. An infrared lamp may be used to heat the chamber and sample therein directly or heated air may be allowed to enter the sealable chamber. Air may be drawn directly from the sealable chamber to the vacuum pump bypassing the cold trap. Various parameters may be used to determine if the drying process is complete, including the degree of vacuum achieved in the chamber.Type: ApplicationFiled: August 29, 2014Publication date: December 18, 2014Inventors: Tianqing He, Ali Regimand, Lawrence H. James, Peter D. Muse
-
Patent number: 8826564Abstract: An apparatus and method for quickly drying porous materials. A sealable chamber is connected to a cold trap which is connected to a vacuum pump. A sample is placed inside the sealable chamber. The vacuum pump is turned on and air is evacuated through the cold trap to the vacuum pump. An infrared lamp may be used to heat the chamber and sample therein directly or heated air may be allowed to enter the sealable chamber. Air may be drawn directly from the sealable chamber to the vacuum pump bypassing the cold trap. Various parameters may be used to determine if the drying process is complete, including the degree of vacuum achieved in the chamber.Type: GrantFiled: June 26, 2012Date of Patent: September 9, 2014Assignee: InstroTek, Inc.Inventors: Tianqing He, Ali Regimand, Lawrence H. James, Peter D. Muse
-
Patent number: 8312776Abstract: An apparatus and method for determination of susceptibility of asphalt concrete materials to moisture damage. An asphalt sample of known bulk specific gravity (density) is placed inside a chamber filled with water, which is capable of heating the sample to a predetermined temperature. The chamber is pressurized by introduction of air pressure to a flexible membrane that decreases the volume within a chamber containing the sample and water, increasing the pore pressure in the sample. The pressure is then released and allowed to come to ambient pressure. This process is repeated a predetermined number of times (cycles). When a selected number of cycles are complete, the asphalt sample is removed from the chamber and its bulk specific gravity (density) measured again. The difference between the density before and after conditioning is an excellent method of rating the degree at which moisture would deteriorate asphalt samples due to introduction of moisture.Type: GrantFiled: May 16, 2011Date of Patent: November 20, 2012Assignee: InstroTek, Inc.Inventors: Ali Regimand, Lawrence H. James, Peter D. Muse, Keith Landreth, Tianqing He
-
Publication number: 20120285038Abstract: An apparatus and method for quickly drying porous materials. A sealable chamber is connected to a cold trap which is connected to a vacuum pump. A sample is placed inside the sealable chamber. The vacuum pump is turned on and air is evacuated through the cold trap to the vacuum pump. An infrared lamp may be used to heat the chamber and sample therein directly or heated air may be allowed to enter the sealable chamber. Air may be drawn directly from the sealable chamber to the vacuum pump bypassing the cold trap. Various parameters may be used to determine if the drying process is complete, including the degree of vacuum achieved in the chamber.Type: ApplicationFiled: June 26, 2012Publication date: November 15, 2012Inventors: Tianqing He, Ali Regimand, Lawrence H. James, Peter D. Muse
-
Patent number: 8225526Abstract: An apparatus and method for quickly drying porous materials. A sealable chamber is connected to a cold trap which is connected to a vacuum pump. A sample is placed inside the sealable chamber. The vacuum pump is turned on and air is evacuated through the cold trap to the vacuum pump. Because evaporation may lower the temperature inside the sealable chamber, an infrared lamp may be used to heat the chamber and sample therein directly or heated air may be allowed to enter the sealable chamber in response to the vacuum created by the vacuum pump. Air may be drawn directly from the sealable chamber to the vacuum pump bypassing the cold trap. A load cell may be placed in the bottom of the sealable chamber to monitor the weight of a sample to determine if the drying process is complete. Other parameters could be used, including the degree of vacuum achieved in the chamber.Type: GrantFiled: June 24, 2010Date of Patent: July 24, 2012Assignee: InstroTek, Inc.Inventors: Tianqing He, Ali Regimand, Lawrence H. James, Peter D. Muse
-
Patent number: 8020451Abstract: An apparatus and method for determination of susceptibility of asphalt concrete materials to moisture damage. An asphalt sample of known bulk specific gravity (density) is placed inside a chamber filled with water, which is capable of heating the sample to a pre-determined temperature. The chamber is pressurized by introduction of air pressure to a flexible membrane that decreases the volume within a chamber containing the sample and water, increasing the pore pressure in the sample. The pressure is then released and allowed to come to ambient pressure. This process is repeated a predetermined number of times (cycles). When a selected number of cycles are complete, the asphalt sample is removed from the chamber and its bulk specific gravity (density) measured again. The difference between the density before and after conditioning is an excellent method of rating the degree at which moisture would deteriorate asphalt samples due to introduction of moisture.Type: GrantFiled: July 9, 2008Date of Patent: September 20, 2011Assignee: InstroTek, Inc.Inventors: Ali Regimand, Lawrence H. James, Peter D. Muse, Keith Landreth, Tianqing He
-
Publication number: 20110214484Abstract: An apparatus and method for determination of susceptibility of asphalt concrete materials to moisture damage. An asphalt sample of known bulk specific gravity (density) is placed inside a chamber filled with water, which is capable of heating the sample to a predetermined temperature. The chamber is pressurized by introduction of air pressure to a flexible membrane that decreases the volume within a chamber containing the sample and water, increasing the pore pressure in the sample. The pressure is then released and allowed to come to ambient pressure. This process is repeated a predetermined number of times (cycles). When a selected number of cycles are complete, the asphalt sample is removed from the chamber and its bulk specific gravity (density) measured again. The difference between the density before and after conditioning is an excellent method of rating the degree at which moisture would deteriorate asphalt samples due to introduction of moisture.Type: ApplicationFiled: May 16, 2011Publication date: September 8, 2011Inventors: Ali Regimand, Lawrence H. James, Peter D. Muse, Keith Landreth, Tianqing He
-
Publication number: 20100319211Abstract: An apparatus and method for quickly drying porous materials. A sealable chamber is connected to a cold trap which is connected to a vacuum pump. A sample is placed inside the sealable chamber. The vacuum pump is turned on and air is evacuated through the cold trap to the vacuum pump. Because evaporation may lower the temperature inside the sealable chamber, an infrared lamp may be used to heat the chamber and sample therein directly or heated air may be allowed to enter the sealable chamber in response to the vacuum created by the vacuum pump. Air may be drawn directly from the sealable chamber to the vacuum pump bypassing the cold trap. A load cell may be placed in the bottom of the sealable chamber to monitor the weight of a sample to determine if the drying process is complete. Other parameters could be used, including the degree of vacuum achieved in the chamber.Type: ApplicationFiled: June 24, 2010Publication date: December 23, 2010Inventors: Tianqing He, Ali Regimand, Lawrence H. James, Peter D. Muse
-
Publication number: 20100005898Abstract: An apparatus and method for determination of susceptibility of asphalt concrete materials to moisture damage. An asphalt sample of known bulk specific gravity (density) is placed inside a chamber filled with water, which is capable of heating the sample to a pre-determined temperature. The chamber is pressurized by introduction of air pressure to a flexible membrane that decreases the volume within a chamber containing the sample and water, increasing the pore pressure in the sample. The pressure is then released and allowed to come to ambient pressure. This process is repeated a predetermined number of times (cycles). When a selected number of cycles are complete, the asphalt sample is removed from the chamber and its bulk specific gravity (density) measured again. The difference between the density before and after conditioning is an excellent method of rating the degree at which moisture would deteriorate asphalt samples due to introduction of moisture.Type: ApplicationFiled: July 9, 2008Publication date: January 14, 2010Inventors: Ali Regimand, Lawrence H. James, Peter D. Muse, Keith Landreth, Tianqing He
-
Patent number: 7098034Abstract: Methods, systems, and computer program products analyze asphalt samples for anti-stripping agents by: obtaining a sample comprising asphalt binder material; sensing a selected parameter associated with the sample (such as the acidity and/or alkalinity of the sample); and analyzing the sensed parameter to assess at least one of: (a) the presence of at least one anti-stripping agent in the sample; and (b) the level of at least one anti-stripping agent in the sample. The sample can be heated so that it emits exhaust gas and the exhaust gas (directly or indirectly) interrogated to determine its pH, or other constituents or properties, such as ammonia. Pre-defined mathematical relationships can be used to correlate the measured sensed data to the concentrations of the anti-stripping agent(s) in the sample undergoing analysis. The evaluation can be carried out in a generally automated rapid manner so that the test can be completed in about 10 minutes or less. Related devices and kits are also described.Type: GrantFiled: December 23, 2002Date of Patent: August 29, 2006Assignee: InstroTek, Inc.Inventors: Tianqing He, Ali Regimand, Peter D. Muse, Lawrence H. James
-
Patent number: 6995667Abstract: Methods, systems, and computer program products configured to track the geographic location of hazmat substances or devices including same, such as nuclear gauges with a radioactive component, include mounting a tracking device in proximity to the substance, the tracking device configured to provide at least one tracking signal that is detectable from a remote location to thereby allow its geographic location to be determined remotely.Type: GrantFiled: December 23, 2002Date of Patent: February 7, 2006Assignee: InstroTek, Inc.Inventors: Tianqing He, Peter D. Muse, Ali Regimand, Lawrence H. James
-
Publication number: 20050253703Abstract: Methods, systems, and computer program products configured to track the geographic location of hazmat substances or devices including same, such as nuclear gauges with a radioactive component, include mounting a tracking device in proximity to the substance, the tracking device configured to provide at least one tracking signal that is detectable from a remote location to thereby allow its geographic location to be determined remotely.Type: ApplicationFiled: December 23, 2002Publication date: November 17, 2005Inventors: Tianqing He, Peter Muse, Ali Regimand, Lawrence James
-
Publication number: 20050102851Abstract: An apparatus and method for quickly drying porous materials. A sealable chamber is connected to a cold trap which is connected to a vacuum pump. A sample is placed inside the sealable chamber. The vacuum pump is turned on and air is evacuated through the cold trap to the vacuum pump. Because evaporation may lower the temperature inside the sealable chamber, an infrared lamp may be used to heat the chamber and sample therein directly or heated air may be allowed to enter the sealable chamber in response to the vacuum created by the vacuum pump. Air may be drawn directly from the sealable chamber to the vacuum pump bypassing the cold trap. A load cell may be placed in the bottom of the sealable chamber to monitor the weight of a sample to determine if the drying process is complete. Other parameters could be used, including the degree of vacuum achieved in the chamber.Type: ApplicationFiled: November 15, 2003Publication date: May 19, 2005Inventors: Tianqing He, Ali Regimand, Lawrence James, Peter Muse
-
Publication number: 20040121473Abstract: Methods, systems, and computer program products analyze asphalt samples for anti-stripping agents by: obtaining a sample comprising asphalt binder material; sensing a selected parameter associated with the sample (such as the acidity and/or alkalinity of the sample); and analyzing the sensed parameter to assess at least one of: (a) the presence of at least one anti-stripping agent in the sample; and (b) the level of at least one anti-stripping agent in the sample. The sample can be heated so that it emits exhaust gas and the exhaust gas (directly or indirectly) interrogated to determine its pH, or other constituents or properties, such as ammonia. Pre-defined mathematical relationships can be used to correlate the measured sensed data to the concentrations of the anti-stripping agent(s) in the sample undergoing analysis. The evaluation can be carried out in a generally automated rapid manner so that the test can be completed in about 10 minutes or less. Related devices and kits are also described.Type: ApplicationFiled: December 23, 2002Publication date: June 24, 2004Inventors: Tianqing He, Ali Regimand, Peter D. Muse, Lawrence H. James