Vibration signal acquisition and processing system design in the oil field water-injection station pump

Abstract

According to the working condition and the common fault causes of the water-injection pump, this paper introduces a data acquisition and signal processing circuit of the oil field water-injection station pump vibration detection system. In terms of hardware, the scheme design consists of data acquisition module based on the three-axis acceleration sensor ADXL345 and microprocessor STM32F030, data processing and transmit module based on the 433 MHz wireless transparent data transceiver module YL-100IL and microprocessor STM32F407, and the PC module for the analysis and display of the vibration signal for the pump. For the processing and analysis of the vibration signal, the acquired acceleration signal is processed using the Empirical Mode Decomposition method to reduce noises, after which the frequency spectrum of the vibration signal can be obtained. Due to the fact that different faults of the pump can produce different characteristic frequencies, the frequency spectrum gained from using Empirical Mode Decomposition can be used to the analysis of the water-injection pump fault diagnosis. Finally, field tests prove that the circuit in the system works stably and meets the design requirements. It is able to achieve the function of vibration signal acquisition, processing, and diagnosis of the working condition.