Patents Assigned to SensorTran, Inc.
-
Patent number: 9002152Abstract: A DTS system resistant to radiation induced attenuation losses during the service life of an installation at both low and high temperatures using matched multi-wavelength distributed temperature sensing automatic calibration technology in combination with designed Pure Silica Core (PSC) optical fibers and an in process photo bleaching method provided by the light sources of the distributed temperature sensing system.Type: GrantFiled: April 30, 2011Date of Patent: April 7, 2015Assignee: SensorTran, Inc.Inventor: Mikko Jaaskelainen
-
Patent number: 8897608Abstract: A method of improving sampling resolution in a distributed temperature measurement system using a fiber optic distributed sensor by means of programmed delayed trigger signals to a laser light source in order to improve the spatial resolution of such systems.Type: GrantFiled: June 8, 2010Date of Patent: November 25, 2014Assignee: SensorTran, Inc.Inventors: Kent Kalar, Kari-Mikko Jaaskelainen, David Barfoot
-
Patent number: 8894277Abstract: A system and method for providing greatly improved linear heat detection using fiber optic distributed temperature systems (DTS). The invention makes use of correction algorithms based on proportional-integral-derivative notions that anticipate exterior temperature increases based on the rate of measured temperature changes.Type: GrantFiled: October 20, 2010Date of Patent: November 25, 2014Assignee: SensorTran, Inc.Inventors: David Barfoot, Mikko Jaaskelainen
-
Patent number: 8630816Abstract: High resolution distributed temperature sensors using fiber optic distributed temperature sensing systems deployed on various carriers to significantly improve spatial resolution and provide high resolution temperature profile and detection of fluid or fluid interface levels.Type: GrantFiled: November 16, 2009Date of Patent: January 14, 2014Assignee: SensorTran, Inc.Inventors: Brian Park, Mohammed Fassih-Nia, Brian K. McCoy, Kent Kalar, Kari-Mikko Jaaskelainen
-
Patent number: 8553211Abstract: A Brillouin system for monitoring both temperature and strain includes either a single or double-ended fiber with multiple fiber Bragg gratings (FBG's) at different wavelengths and a pumped seed laser system tunable over a range substantially larger than a Brillouin shift. The FBG's are distributed along the length of the deployed fiber and serve as wavelength selectable reflectors that enable maintaining system operation even in the case of a fiber break.Type: GrantFiled: October 23, 2010Date of Patent: October 8, 2013Assignee: SensorTran, Inc.Inventor: Mikko Jaaskelainen
-
Patent number: 8496376Abstract: An automatic and continuous method is presented to improve the accuracy of fiber optic distributed temperature measurements derived from Raman back scatterings utilizing two light sources with different wavelengths, by choosing the wavelengths of the two sources so the primary source's return anti-Stokes component overlaps with the incident wavelength of the secondary light source thereby canceling out the non-identical attenuations generated by the wavelength differences between Stokes and anti-Stokes bands.Type: GrantFiled: July 7, 2008Date of Patent: July 30, 2013Assignee: SensorTran, Inc.Inventors: Chung Lee, Kwang Suh
-
Patent number: 8414186Abstract: A new step-index multimode pure silica core fiber for DTS (Distributed Temperature Sensing) system particularly useful for downhole environments is disclosed and described. The new sensor system provides optimum tradeoffs between coupling power, spatial resolution, and temperature resolution.Type: GrantFiled: July 18, 2008Date of Patent: April 9, 2013Assignee: SensorTran, Inc.Inventors: Chung Lee, Kwang Suh, Mahesh Ajgaonkar, Kent Kalar
-
Patent number: 8333505Abstract: Systems and methods for extending the range of a fiber optic DTS system are provided. In one respect, a method may provide steps for transmitting, in a first time period, an optical signal at a first energy level through an optical fiber, collecting backscatter signals as a result of the first transmission, adjusting the first energy level to a second energy level, transmitting, in an additional time period, the adjusted optical signal through the optical fiber, collecting backscatter signals as a result of the adjusted transmissions, and using a portion of the collected backscatter as a result of the first transmission and a portion of the collected backscatter as a result of the additional transmissions, determining one or more parameter profiles, such as a temperature profile.Type: GrantFiled: January 17, 2009Date of Patent: December 18, 2012Assignee: SensorTran, Inc.Inventors: Chung Lee, Kent Kalar, Mahesh Ajgaonkar, Michael Sanders
-
Patent number: 7876982Abstract: A sensor apparatus for sensing parameters of an object may include at least one optical fiber, one or more attaching members and a tensioner. The one or more attaching members may be coupled to the optical fiber and may attach the one optical fiber to an object. The tensioner may be coupled to the optical fiber and may secure the one or more optical fiber against a surface of an object.Type: GrantFiled: November 9, 2007Date of Patent: January 25, 2011Assignee: SensorTran, Inc.Inventors: Brian Park, Mohammed Fassih-Nia
-
Patent number: 7628533Abstract: Systems and methods for detecting corrosion are provided. In one embodiment, a luminescent material coupled to a cladding of an optical fiber may be altered when exposed to corrosion. The backscatter emission of the luminescent material, which includes the altered optical properties, may be used to determine properties of the corrosion including, for example, thickness, or location of the corrosion.Type: GrantFiled: October 22, 2007Date of Patent: December 8, 2009Assignee: SensorTran, IncInventors: Chung E. Lee, William Hallidy
-
Patent number: 7628531Abstract: Systems and methods for calibrating a temperature sensing system are disclosed. In one respect, a dual light source configuration may be provided. A first light source may illuminate a sensing fiber and an anti-Stokes band may be detected. A second light source may illuminate a sensing fiber and a Stokes band may be detected, where the Stokes band is substantially similar to the anti-Stokes band of the first light source. A ratio between the anti-Stokes and Stokes band may be used to calibrate a temperature sensing system.Type: GrantFiled: March 13, 2007Date of Patent: December 8, 2009Assignee: SensorTran, IncInventors: Chung E. Lee, Kent Kalar, Michael E. Sanders
-
Publication number: 20090123110Abstract: A sensor apparatus for sensing parameters of an object may include at least one optical fiber, one or more attaching members and a tensioner. The one or more attaching members may be coupled to the optical fiber and may attach the one optical fiber to an object. The tensioner may be coupled to the optical fiber and may secure the one or more optical fiber against a surface of an object.Type: ApplicationFiled: November 9, 2007Publication date: May 14, 2009Applicant: SensorTran, Inc.Inventors: Brian Park, Mohammed Fassih-Nia
-
Patent number: 7526397Abstract: Systems and methods for calibrating a temperature sensing system are disclosed. In one respect, a line may be placed in operative relation with a first reference cell and a second reference cell. The temperatures of the first and second reference cells may be adjusted. In one non-limiting example, the temperature of the first reference cell may be adjusted to a temperature above an ambient temperature and the temperature of the second reference cell may be adjusted to a temperature below an ambient temperature. The temperature sensing system may be calibrated based on the temperature data of the first and second reference cells.Type: GrantFiled: March 13, 2007Date of Patent: April 28, 2009Assignee: SensorTran, Inc.Inventors: Kent Kalar, Michael E. Sanders, Chung Lee, Brian Park, Mohammed Fassih-Nia