阵列声波井下信号采集与处理系统设计

针对阵列声波测井中声波全波列信号的特点,设计了一种满足实际生产作业要求的井下信号采集与处理系统。该系统以80C186为控制核心,主要实现与地面系统的通信和整个井下系统的控制;采用多片TMS320VC5416构成多通道实时信号处理电路,用于实现数字滤波、波形叠加、首波到时提取等处理。同时,阐述了基于短窗-长窗能量比算法的首波提取技术及其实现。

Design of Array Acoustic Signal's Downhole Acquisition and Processing System

Based on the characteristic of the array acoustic full waveform signal,a system of signal acquisition and processing,fitting for practical project,has been designed.In this system,80C186 is at heart of the central control unit,mainly to communicate with over-ground system and make whole system work successfully;data acquisition and processing can be accomplished by TMS320VC5416,with the functions of digital filtering,splicing of multiple waves,and calculating the arriving time of the head wave.Besides,a method of detecting head wave of acoustic array as the arithmetic of energy ratio of short-window and long-window,and its realization are also introduced