可控震源DR板原理分析与作用简介

Vibroseis DR board principle analysis and role introduction

在可控震源扫描过程中,由于受到近地表地质构造的影响,伺服阀的负载可能会发生突然的变化,进而造成伺服阀流量突变,影响震动系统的稳定,表现出畸变增大、出力超限、相位超标等问题。通过在伺服阀上加装带有液压油道和节流孔的DR板,能够在伺服阀芯上施加压力反馈,从而有效地提高伺服阀阻尼,减小压力波动带来的影响,本文对该基本原理进行了阐述。

In the process of vibroseis sweep,due to the influence of near-surface geological formations,the load on the servo valve may change abruptly,which in turn causes sudden changes in the servo valve flow and affects the stability of the vibration system,showing increased distortion,force overrun,phase overrun,etc.By adding a DR board with hydraulic oil channels and throttle holes to the servo valve,it is possible to apply pressure feedback on the servo valve spool,thus effectively improving the servo valve damping and reducing the impact caused by pressure fluctuations,and the basic principle is described in this pap er.