Communications: electrical – Continuously variable indicating – Condition responsive
Patent
1997-11-12
1999-12-07
Horabik, Michael
Communications: electrical
Continuously variable indicating
Condition responsive
20419636, 205730, 324425, G08B 2100
Patent
active
059991070
ABSTRACT:
A cathodic protection monitoring system for buried metal objects comprising a transponder hard-wire connected to a sacrificial anode and a reference electrode, each of the transponder, the sacrificial anode and the reference electrode being buried underground in close proximity to the buried metal object to be protected, thereby forming a first principal circuit between the sacrificial anode and the buried metal object and forming a second principal circuit between the reference electrode and the buried metal object. The system further comprises a portable transceiver disposed above ground tuned to a frequency of the transponder. Power for operation of the transponder is drawn from the cathodic protection circuit, thereby obviating the need for connections to above ground power supplies.
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Cooper Joel
Gershman Albert W.
McCarty Joe W.
Shapiro Arthur
Ziolkowski Christopher J.
Edwards Jr Timothy
Horabik Michael
Institute of Gas Technology
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