Refrigeration – Storage of solidified or liquified gas – With vapor discharged from storage receptacle
Patent
1997-05-27
1998-12-08
Capossela, Ronald
Refrigeration
Storage of solidified or liquified gas
With vapor discharged from storage receptacle
62 511, F17C 310
Patent
active
058455000
ABSTRACT:
A magnetic telescope utilized to detect flaws in underground articles such as underground piping, implements multiple stages in the form of geometric and electronic configurations to enhance noise suppression. The geometric configuration includes a differential configuration of two pair of source coils which generate the magnetic flux, and gradiometers which pick-up the magnetic flux. A superconducting quantum interference device (SQUID) is utilized to detect the magnetic flux. The electronic configuration includes circuitry to adjust the current in the source coil pairs to minimize the signal seen by the SQUID when no underground article is present. The electronic configuration also includes feedback circuitry to feed back magnetic flux to the SQUID based on the signal detected by the SQUID. Combining the geometric and electronic configurations provides enhanced noise suppression so that the SQUID is capable of detecting smaller flaws in the underground piping for the same amount of source magnetic flux.
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Capossela Ronald
Creighton Wray James
Narasimhan Meera P.
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