射频识别(Radio Frequency Identification)是一种非接触式的自动识别技术,它利用射频方式进行双向通信,从而达到识别或交换数据或读写记录媒体信息的目的。本文介绍了射频识别技术的概念、应用范围、分类、工作原理、典型应用及取代条...射频识别(Radio Frequency Identification)是一种非接触式的自动识别技术,它利用射频方式进行双向通信,从而达到识别或交换数据或读写记录媒体信息的目的。本文介绍了射频识别技术的概念、应用范围、分类、工作原理、典型应用及取代条形码的趋势,是一篇比较系统地介绍射频识别技术及其应用前景的科普性文章。展开更多
Field Programmable Gate Array(FPGA),combined with ARM(Advanced RISC Machines) is increasingly employed in the portable data acquisition(DAQ) system for nuclear experiments to reduce the system volume and achieve power...Field Programmable Gate Array(FPGA),combined with ARM(Advanced RISC Machines) is increasingly employed in the portable data acquisition(DAQ) system for nuclear experiments to reduce the system volume and achieve powerful and multifunctional capacity.High-speed data transmission between FPGA and ARM is one of the most challenging issues for system implementation.In this paper,we propose a method to realize the high-speed data transmission by using the FPGA to acquire massive data from FEE(Front-end electronics) and send it to the ARM whilst the ARM to transmit the data to the remote computer through the TCP/IP protocol for later process.This paper mainly introduces the interface design of the high-speed transmission method between the FPGA and the ARM,the transmission logic of the FPGA,and the program design of the ARM.The theoretical research shows that the maximal transmission speed between the FPGA and the ARM through this way can reach 50 MB/s.In a realistic nuclear physics experiment,this portable DAQ system achieved 2.2 MB/s data acquisition speed.展开更多
Linear Technology公司推出低功耗14位600ksps模数转换器（ADC）LTC1408，该器件具有6个同时采样差分输入。这款3线串行ADC采用单3V电源工作，典型功耗为15mW。LTC1408采用32引脚（5mm×5mm）QFN封装。与最接近的同类器件相比，LTC1...Linear Technology公司推出低功耗14位600ksps模数转换器（ADC）LTC1408，该器件具有6个同时采样差分输入。这款3线串行ADC采用单3V电源工作，典型功耗为15mW。LTC1408采用32引脚（5mm×5mm）QFN封装。与最接近的同类器件相比，LTC1408的功耗是其1／10，封装大小是其1/5。该器件可容许设计紧凑、电池供电型和便携式数据采集系统。具6个同时采样的差分输入使LTC1408非常适用于多相电源测量、多相电动机控制、数据采集系统和不中断电源。展开更多
Linear Technology公司推出低功耗14位600ksps模数转换器（ADC）UC1408，该器件具有6个同时采样差分输入。这款3线串行ADC采用单3V电源工作，典型功耗为15mW。LTC1408采用32引脚（5mm×5mm）QFN封装。与最接近的同类器件相比，LTC1...Linear Technology公司推出低功耗14位600ksps模数转换器（ADC）UC1408，该器件具有6个同时采样差分输入。这款3线串行ADC采用单3V电源工作，典型功耗为15mW。LTC1408采用32引脚（5mm×5mm）QFN封装。与最接近的同类器件相比，LTC1408的功耗是其1／10，封装大小是其1／5。该器件可容许设计紧凑、电池供电型和便携式数据采集系统。其6个同时采样的差分输入使得LTC1408非常适用于多相电源测量、多相电动机控制、数据采集系统和不中断电源。展开更多
文摘射频识别(Radio Frequency Identification)是一种非接触式的自动识别技术,它利用射频方式进行双向通信,从而达到识别或交换数据或读写记录媒体信息的目的。本文介绍了射频识别技术的概念、应用范围、分类、工作原理、典型应用及取代条形码的趋势,是一篇比较系统地介绍射频识别技术及其应用前景的科普性文章。
文摘Field Programmable Gate Array(FPGA),combined with ARM(Advanced RISC Machines) is increasingly employed in the portable data acquisition(DAQ) system for nuclear experiments to reduce the system volume and achieve powerful and multifunctional capacity.High-speed data transmission between FPGA and ARM is one of the most challenging issues for system implementation.In this paper,we propose a method to realize the high-speed data transmission by using the FPGA to acquire massive data from FEE(Front-end electronics) and send it to the ARM whilst the ARM to transmit the data to the remote computer through the TCP/IP protocol for later process.This paper mainly introduces the interface design of the high-speed transmission method between the FPGA and the ARM,the transmission logic of the FPGA,and the program design of the ARM.The theoretical research shows that the maximal transmission speed between the FPGA and the ARM through this way can reach 50 MB/s.In a realistic nuclear physics experiment,this portable DAQ system achieved 2.2 MB/s data acquisition speed.
