Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1980-12-15
1982-10-26
Tokar, Michael J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324 72, 324425, G01R 3412
Patent
active
043564445
ABSTRACT:
An apparatus for testing the pipe-to-soil potential of a buried pipeline having a plurality of rectifiers electrically connected to it in spaced-apart intervals for applying an electrical potential to the pipe includes a plurality of interrupter units electrically connected to the rectifiers for turning them on and off at intervals. A clock reference unit is electrically connectable to each of the interrupters for synchronizing them for turning all of the rectifiers on and off in unison. A portable sensing device produces signals indicative of the pipe-to-soil potential of the pipe and directs these signals to a demultiplexer unit which is also synchronized with the clock reference unit for separating the signals corresponding to the ON and OFF potentials which are then separately recorded.
The method of the invention thus includes alternately turning each rectifier on and off, synchronizing the turning on and off of all of the rectifiers, producing signals indicative of the pipe-to-soil potential of the pipe at various positions therealong and separating the signals indicative of the ON and OFF potentials in synchronization with the rectifiers so that the ON and OFF potentials may be separately recorded.
REFERENCES:
patent: 2974276 (1961-03-01), Davis
patent: 3066256 (1962-11-01), Rasor
patent: 3526831 (1970-09-01), Smith
patent: 3735249 (1973-05-01), Stoll
patent: 3753091 (1973-08-01), Daspit
patent: 3991363 (1976-11-01), Lathrop
patent: 4039938 (1977-08-01), Link
patent: 4099117 (1978-07-01), Erath
patent: 4134061 (1979-01-01), Gudgel
patent: 4151458 (1979-04-01), Seager
patent: 4228399 (1980-10-01), Rizzo
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