基于DSP和FPGA的MCI控制系统设计

Design of MCI Control System Based on DSP and FPGA

给出了以EP2C35F484和TMS320F28335型32位浮点DSP为核心的,数字式地层微电阻率扫描成像系统的,信号采集及控制的基本原理及实现方案。由于传统芯片及附属数字芯片体积较大,导致井下电路过于复杂、庞大。结合仪器内径小、长度有限的具体实际,该系统设计由发送接收、信号采集、控制输出以及CAN通信4个模块构成,由DSP和FPGA联合实现采集控制功能。这里主要对DSP和FPGA模块进行设计,其数据传输速度、采集的信息量、数据处理精度以及系统可靠性等性能都有大幅提高。

Based on EP2C35F484, one of the FPGA chips in Cyclone II series developed by Altera and TMS320F28335, one 32 - bit floating point DSP developed by TI, this paper deals with the basic principles and implementation of signal acquisition and control of the digital stratum micro-resistivity scanning imaging system. Because of the large volume of traditional chip and ancillary digital chip, the underground circuit is overly complex and huge, and this implementation in the small diameter instrument is rarely reported. Combined with the small diameter of the instrument and the finite length, this system is designed consisting of four modules ： the sending and receiving, signal acquisition, control output and CAN communication. The acquisition and control functions are achieved by the joint of DSP and FPGA. So the DSP and FPGA module designs are discussed in detail. The data transfer speed, the amount of information collection, data processing accuracy and System reliability performance are greatly improved.