抽油机光杆位移的无线测试方法解析

为了研究基于加速度传感器的抽油机光杆位移测试方法,以集成加速度传感器ADXL202为核心,设计了抽油机光杆位移测试系统.针对游梁式抽油机光杆加速度数据所具有的特点,探讨了在离散采样的情况下通过加速度求解位移的算法过程.求解过程中,利用滑动值滤波法对加速度波形进行滤波,通过寻找平滑一阶导数的下行过零点来计算得到峰值的位置,并给出了具体的测算算法.最终的位移测试结果验证了精确确定下死点位置的重要性以及相关算法的有效性.

Analysis on the Wireless Testing Method for Displacement of Polished Rod of the Pumping Unit

In order to study the method based on acceleration sensor for testing displacement of the polished rod in pumping unit,with the integrated acceleration sensor ADXL202 as the core,the displacement test system for polished rod in pumping unit is designed.In accordance with the features of the acceleration data of polished rod from walking beam pumping unit,the calculation procedures for displacement from acceleration under discrete sampling are investigated.During the solution procedure,the acceleration waveform is filtered by using sliding filtering method,and through looking for downward zero-crossings in smooth first order derivative,the peak position is calculated.The practical measuring and calculating method is given.The result of final displacement measurement verifies the effectiveness of the algorithm and the significance of determining the position of dead point.