Method and an apparatus for measuring the flow in oscillating displacement pumps
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United States of America Patent
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Sep 10, 1991
Issued Date -
N/A
app pub date -
Jun 2, 1989
filing date -
Dec 27, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a method and apparatus for measuring and monitoring the flow in oscillating displacement pumps, the basis for measurement used is the working principle of the pump itself and, accordingly, the mathematically unambiguous relation between the displacer kinematics and the compression or expansion time of the displacer is utilized, in particular via a microcomputer. For this purpose the compression time and expansion time are measured as the time difference between the back and the front dead point position of the plunger, respectively, and the coupling pressure peak at the beginning of the feeding process and the suction process, respectively, which is effected in particular by sensors.
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