多极子阵列声波测井仪多通道采集系统

A Multi-channel Data Acquisition System for Multi-pole Array Sonic Logging Tool

设计一种用于多级子阵列声波测井仪的高精度多通道同步数据采集系统,可工作于井下高温环境。介绍该系统的电路结构和软件设计思路。该多通道采集系统使用数字信号处理器和复杂可编程逻辑器件控制单片多通道模数转换芯片,有效减小了电路板体积和功耗。由于采集参数可控,该系统有较好的通用性,它完成16通道的采集任务只需要2片220mm×48mm的电路板。测试结果表明,该多通道同步数据采集系统性能稳定,可满足仪器设计要求。

Designed is a multi-channel synchronous data acquisition system with high precision for multi-pole array sonic logging tool, which can work in high temperature downhole environment. This article introduces the circuit configuration and software design of this system. It uses digital signal processing and complex programmable logic device to control the single-chip with multi channel analog-digital conversion program, which can effectively reduce circuit board size and power consumption. For its acquisition parameters are controllable, the system has good versatility. The system only needs 2 circuit boards of 220 mm × 48 mm to do 16 channel synchronous data acquisition work. Testing result shows that this system has stable performances and can meet the requirement of the multi-pole sonic logging tool.