广域电磁接收机中ARM系统的应用

在多通道广域电磁接收机中，高性能嵌入式系统的应用，将有利于提高其智能化控制水平，更好地满足勘探中在功耗、信号处理能力和实时响应能力等方面的要求。本文在分析嵌入式系统及微处理器的基础上，选取了美国德州仪器公司生产的嵌入式ARM Cortex－A8微处理器AM3517作为硬件核心，阐述了AM3517处理器的基本工作原理和ARM嵌入式系统硬件平台的设计方法，结合广域电磁法的应用需求，设计了基于AM3517的核心主控电路。应用Cadence专业电子设计软件，详细解析了硬件平台设计过程，所设计平台配置了存储系统及外围硬件等模块，完成了核心系统的硬件电路原理图和PCB板设计。同时基于硬件平台，完成了Linux软件系统的移植以及主要模块的调试，经测试表明该ARM系统应用在广域电磁接收机中以实现主控功能是可行的。

The Application of ARM System to the Wide Field Electromagnetic Receivers

In the multichannel wide field electromagnetic receiver, the high--performance embedded system is helpful for improving the intelligence and automation controlling level, and this system can meet the demand of the power consumption, signal processing and real --time responding ability when working in resource exploration. This paper introduces the basic principle and designing method of ARM embedded hardware system, choosing the Texas Instrument embedded ARM Cortex--A8 microprocessor AM3517 as the core of hardware based on the analysis of embedded system and microprocessor. Combined with applying needs of wide field electromagnetic method, this paper introduces the core system on AM3517. Using the ORCAD software, this paper analyzes the design process of hard- ware platform in detail. The platform is configured with memory system and peripheral e- quipments, and the hardware principle circuit and PCB board of the whole core system is completed. Based on the hardware platform, the Linux software system is transplanted and the main circuit modules are debugged. Therefore, the ARM system, which is used as the control core, is entirely feasible in the wide field receivers.