Method of checking the loading and unloading of tankers by means of an electromagnetic identification system, and an identification system for use in said method
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United States of America Patent
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Dec 3, 1991
Issued Date -
N/A
app pub date -
Dec 5, 1990
filing date -
Aug 25, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for, checking the loading and unloading of a tanker having at least one tank provided with a metal connecting pipe adapted to be coupled via a coupling to one end of a hose having a coupling at two ends, which hose can be coupled to a metal connecting pipe of a storage tank. The hose used is provided with an electric conductor extending between the couplings for the dissipation of electrostatic charges and the chassis of the tanker is grounded. A first inductive coupling is effected between one of the connecting pipes and an interrogator of an electromagnetic identification system, and a second inductive coupling is effected between the other connecting pipe and a passive responder generating a coded signal in an interrogation field. Thus an interrogation field formed by the interrogator cooperates via the first inductive coupling, the one connecting pipe, the electric conductor of the hose, the other connecting pipe, and the second inductive coupling with the responder. The code of the responder is checked prior to loading or unloading.
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