【摘要】 用核磁共振的方法直接探测地下水是该技术应用的新领域。由吉林大学开发并研制的核磁共振地下水探测仪(JLMRS)可直接探测地下水,探测深度最大可达地下150 m,瞬时最大输出功率可达300A/3 000 V,接收信号可达纳伏级。所以,对于JLMRS在数据传输量和信令控制方面必须有很高的要求。本文基于嵌入式Linux系统,采用mini2440开发板将串口网口连接,建立交叉编译环境,编写相关程序。利用典型的RS-232和TCP/IP协议完成串口网口转换,并且成功完成数据收发工作。最终提高了JLMRS找水仪的综合性能指标。更多还原

【Abstract】 Nuclear magnetic resonance(NMR) technique is one of the cutting-edge technologies in the world.Using NMR to directly detec groundwater is the new field of the technique.Jilin University NMR groundwater detector(JLMRS) is developed by the Jilin University.The instrument can detect groundwater,and detecting depth reaches of 150 m underground.Its instantaneous maximum output power reaches 300 A/300 V,and received signal reaches nV level.Therefore,for the JLMRS,the volume of data transmission and signal control must have high demand.Based on Linux embedded system,using mini2440 development board to connect serial port and network port,this paper builds the cross compile environment,cmpiles related program,and uses typical RS-232 and TCP/IP protocol to complete conversion between serial port and network port,and receiving and sending of data.Eventually the design completely improves the comprehensive performance index of JLMRS.更多还原