| 摘要 |
A load measuring system comprising an acoustic transmitting transducer for injecting an acoustic signal into a load bearing portion of a sucker rod, and receiving transducer for detecting the signal after it passes through a known length of a sucker rod, and a time delay detector for determining the travel time and in turn, the velocity of the acoustic signal. The acoustic velocity is measured in an unloaded portion of the sucket rod to provide a zero load reference. Measurements are then taken in the loaded portion of the rod and used to indicate dynamic load on the sucker rod string.
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