用于脉冲中子测井仪的变道宽多定标器系统

A Multi-channel Scaler with Adjustable Channel Width Used in Pulsed Neutron Logging Tools

介绍了脉冲中子测井仪在碳氧比伽马能谱测量模式和中子寿命测量模式下的工作状态,并据此设计了一套道宽随时间变化的多定标器系统,着重说明了系统中关键可编程逻辑器件的硬件实现方法。该系统在脉冲中子测井仪中可以监控中子发生器的工作状况,更为重要的是它可以形成中子寿命测井所需的时间谱。

It concerns itself with a muhi-channel scalars （MCS） study of the pulsed neutron logging tool. Different from previous research, it wants to emphasize the importance of CPLDs in the implementation of MCS. Start with a brief introduction to the working modes in multifunetional pulsed neutron logging tools. Then it describes the scheme of the MCS system with adjustable channel width based on CPLDs. The main part is about the hardware program of a key CPLD. At end the study with a system test, which shows a nice performanee.