摘要
常规的模拟滤波器因其滤波系数固定、依赖硬件等特点,已不能适应测井信号处理技术的发展趋势,局限性很明显。数字滤波器具有线性相位特性好、精度高、工作状态稳定等特点,符合测井信号处理的新要求。以电极系信号滤波处理为切入点,分析了电极信号的滤波特点,提出了一种利用FPGA实现低通数字滤波器的方法。介绍了FIR滤波器的技术原理、各种参数确定及其实现过程。新系统在油田推广应用已有数年,采用串并结合方式设计的数字滤波器滤波效果良好,证明了技术方案的可行性、结构稳定性及可靠性。
The conventional analog filter filter coefficients are fixed and dependent on the characteristics of the hardware,which have not been able to adapt to the development trend of logging signal processing technology,and the limitations are obvious.The linear phase characteristic of digital filter is good,the precision is high and the working state is stable,and the new requirement of logging signal processing is met.The signal processing for the electrode system the starting point,the filter characteristics of electrode signal are analyzed and a method of realizing low-pass digital filter using FPGA is proposed.The technical principle,parameter determination and realization process of FIR filter are introduced.The new system has been applied in oilfield for several years,and the filtering effect of digital filter with a combination of strings method is good,which proves the feasibility of the technical scheme and the structure is stable and reliable.
作者
卢亚普
Lu Yapu(Daqing Well Logging Corporation, Daqing 163412, China)
出处
《电子测量技术》
2018年第8期141-145,共5页
Electronic Measurement Technology
