Communications: electrical – Continuously variable indicating – Plural transmitters
Patent
1980-04-03
1981-12-22
Robinson, Thomas A.
Communications: electrical
Continuously variable indicating
Plural transmitters
166 65R, 346 33WL, 360 32, 364520, G06F 304, H04Q 902, G11B 502, G08C 1928
Patent
active
043073956
ABSTRACT:
A method and apparatus for accepting analog voltage signals from a reciprocating liquid well pump and digitizing the signals and storing the signals for playback at a later time. A receiving circuit accepts two analog signals, one of which is proportional to the load in the polished rod, the other of which is proportional to the displacement of the polished rod. Simultaneously the two analog signals are digitized by means of an analog to digital converter and the digital data is stored on a digital memory integrated circuit. The digital memory may be replayed through a digital to analog converter into an x-y plotter. Digital latches and counters detect the start and end of a pumping cycle to insure that one full cycle of the reciprocating pump is stored in the digital memory. Timing circuitry strobes the load and displacement data into the digital memory in equal time increments to allow time related methematics to be performed by a computer. A circuit which accepts the digital memory, which may be separate from the recording device, formats the data and serially transmits the data in a form acceptable to a computer.
REFERENCES:
patent: 3685031 (1972-08-01), Cook
patent: 3838445 (1974-09-01), Cupp et al.
patent: 3896792 (1975-07-01), Vail et al.
patent: 3921152 (1975-11-01), Hagar et al.
Delta-X Corporation
Robinson Thomas A.
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