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Sensor and methods of detecting target materials and situations in closed systems

United States Patent

9,915,575
March 13, 2018
View the Complete Patent at the US Patent & Trademark Office
Disclosed is a passive, in-situ pressure sensor. The sensor includes a sensing element having a ferromagnetic metal and a tension inducing mechanism coupled to the ferromagnetic metal. The tension inducing mechanism is operable to change a tensile stress upon the ferromagnetic metal based on a change in pressure in the sensing element. Changes in pressure are detected based on changes in the magnetic switching characteristics of the ferromagnetic metal when subjected to an alternating magnetic field caused by the change in the tensile stress. The sensing element is embeddable in a closed system for detecting pressure changes without the need for any penetrations of the system for power or data acquisition by detecting changes in the magnetic switching characteristics of the ferromagnetic metal caused by the tensile stress.
Mee; David K. (Knoxville, TN), Ripley; Edward B. (Knoxville, TN), Nienstedt; Zachary C. (Seattle, WA), Nienstedt; Alex W. (Waynesville, NC), Howell, Jr.; Layton N. (Knoxville, TN)
Consolidated Nuclear Security, LLC (Oak Ridge, TN)
14/ 832,482
August 21, 2015
GOVERNMENT RIGHTS The U.S. Government has rights to this invention pursuant to contract number DE-NA0001942 between the U.S. Department of Energy and Consolidated Nuclear Security, LLC.