Drilling mud pump punch speed and stroke frequency measuring equipment and method thereof

Abstract

The invention discloses a measuring device for impulse speed and impulse times in well-drilling mud pumps, and comprises: An acceleration transducer, a signal acquisition and process circuit, a vibration frequency spectrum ananysis circuit, a signal output interface, and a final output for average impulse speed. The invention also discloses a measuring method for impulse speed and impulse times of the well-drilling mud pumps; the measuring device is characterized by the following composition: Measure vibration frequency spectrum signals of a mud pump piston, and perform acquisition, amplification and filtering for the vibration frequency spectrum signals; provide a critical frequency spectrum point; select a time window according to the critical frequency points, and perform wavelet ananysis, and maintain low-frequency signals from the ananysis; conver the low-frequency signals from time domain to frequency domain; determine whether the low-frequency domain signals are steady waves; if yes, take the frequency and calculate to gain the average impulse speed, and then, calculate impulse times in accordance with the average impulse speed and corresponding time segments; then, go back to Step III; if the low-frequency domain signals are not steady waves, re-select a critical frequency spectrum point before returning to Step III; and after that, output the impulse times and average impulse speed that are received.

Description

technical field [0001] The invention relates to a device and method for measuring the punch speed and stroke times of a drilling mud pump, in particular to a device and method for analyzing and calculating the punch speed and stroke times based on measuring the vibration frequency spectrum of the mud pump. Background technique [0002] The existing pump stroke sensor uses a proximity sensor switch, which needs to be installed with an induction plate. The working principle of the proximity sensor switch is: an oscillator can oscillate normally in the air medium, such as a metal conductor (induction sheet) appears in its electromagnetic field, the electromagnetic field energy is lost due to eddy current, which is equivalent to the decrease of the quality factor of the oscillation circuit, thus causing the oscillation to stop. The operating current of the oscillator is Imax during normal oscillation, and the operating current of the oscillator is Imin when the oscillation is s...

AI Technical Summary

Problems solved by technology

Since the distance between the proximity sensor switch and the sensor plate is several millimeters, there is relative movement between the two, which requires

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