描述了一种可以被直接用于测井的激发极化测井仪数控系统。提出采用多次刻度的方法推算前放电路增益值,减小由于温度和器件自身的误差所带来的影响。该系统核心是由FPGA和DSP组成的主从架构,实现对测井工作的控制、数据处理,以及利用CAN总线完成同地面主机的信息交互。经实验证明,该数控系统可以在150℃的高温下无故障的运行。 Describes an excitation polarization logging system that can be used directly for logging. It is proposed to calculate the gain value of the preamplifier by using the multi-scale method to reduce the influence due to the temperature and the error of the device itself. The core of the system is a master-slave architecture composed of FPGA and DSP, which realizes the control of logging work, data processing, and the information exchange with the host on the ground using CAN bus. The experimental results show that the CNC system can operate at a high temperature of 150 ℃ without any trouble.