共查询到20条相似文献，搜索用时 203 毫秒
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本文主要介绍了无线收发芯片nRF401,模数转换芯片TLC0820的相关技术和它的工作原理,及以nRF401为核心的PTR2000无线收发模块的相关特性和接口设计及软件编程的要求。 相似文献
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无线数传芯片性能比较与应用研究 总被引：1，自引：0，他引：1
分析了nRF401、CC1020、nRF903三种典型无线数传芯片的功能、应用领域及工作特性,给出了典型应用电路,提出了一种无线数传芯片性能的横向比较方法,通过该方法可以直观地看出不同芯片的性能差异,为系统设计时快速有效的完成无线数传芯片的选型提供有力的数据参考,为整个系统性能的保障车口系统设计的顺利完成奠定良好的基础。该方法对其它芯片选型具有良好的借鉴作用。 相似文献
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无线通信技术满足了用户对在不同移动状态下获取网络信息的强烈需求,也符合当今社会人员流动性大、工作生活节奏紧张的发展趋势;另一方面,无线通信技术具有网络部署迅速便捷的特点,对于缺乏线缆资源的新兴运营商来说,无线通信技术是成功部署通信网络,迅速为用户提供语音和数据服务的最佳手段。为此,介绍了单片无线收发一体芯片nRF401在无线传输中的应用。 相似文献
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本设计提出了一种基于单片机控制的无线数据传输问题的解决方案。该方案以nRF401为无线传输芯片来设计无线烟雾检测报警系统,采用低功耗、性价比高的AT89S51单片机作为控制核心,采用MC14468离子型烟雾检测报警芯片作为检测火灾及烟雾的传感器,再结合其他外围电路组成烟雾检测报警系统,并最终进行显示和发出声光报警。该系统使用方便,扩展性强,可广泛应用于商场、酒店、居民住宅等高层建筑等场合。 相似文献
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本文介绍了一个以AT89C系列单片机为嵌入式MCU,直接从用电设备上采集数据,通过nRF401无线收发芯片为数据传输工具,有效地把分布于工厂内部的生产设备的用电数据实时地传输到企业的ERP系统的无线嵌入式电量采集系统的设计与实现。该系统对企业的生产成本的控制起到了积极的作用,为企业下一步将要实施的RTE打下了坚实的基础。 相似文献
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该文介绍了以MCU、内嵌8051的RF收发芯片nRF9E5为核心,通过远程指定电话控制,由DTMF集成电路MT8880、语音录放芯片ISD4001和RF收发芯片nRF905等芯片组成的智能家居系统,并给出了该系统主机和分机的基本原理以及设计方案。 相似文献
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文章从工程实际需要出发,在介绍无线收发一体芯片nRF2401的基础上,采用微处理器芯片PICl8F6621、交流采样技术和带有串行接口的功率/电能芯片CS5460,给出了基于nRF2401的高压交流信号无线数据采集系统的整体设计,开通过整个系统的仿真则试,其结果完全符合设计要求, 相似文献
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基于nRF2401的高压交流信号数据采集系统的设计 总被引：1，自引：0，他引：1
文章从工程实际需要出发,在介绍无线收发一体芯片nRF2401的基础上,采用微处理器芯片PIC18F6621、交流采样技术和带有串行接口的功率/电能芯片CS5460,给出了基于nRF2401的高压交流信号无线数据采集系统的整体设计,并通过整个系统的仿真测试,其结果完全符合设计要求。 相似文献
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本文采用无线收发芯片nRF2401和AT89S52单片机设计了一种汽车防撞预警器,描述了nRF2401芯片的特点和工作方式,以及预警系统的设计方案,提出利用m序列控制系统的工作时序来提高系统报警的精确度。此系统主要应用于经常行驶在山路或路面环境较差的车辆上,避免汽车碰撞事故的发生。 相似文献
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《中国科学院院刊(英文版)》2008,22(1):2-3
CAS should stick to the principle of rendering service to, and giving impetus for, the development of China＇s science enterprise by making S＆T innovations, said CAS President LU Yongxiang. The CAS president made the remarks in a recent talk to communicate the gist of the winter session of the Party＇s Leading-member Group at CAS, which was held from 7 to 11 January in Beijing. 相似文献
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《中国科学院院刊(英文版)》2008,22(1)
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says: "This is the gem of our collections: the fossil of a bird that lived 125 million years ago!" Then, pointing at a tiny mound, he explains: "Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants." 相似文献
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Prof. SUN Changpu from the CAS Institute of Theoretical Physics coworkers from University of Basel in Switzerland have worked out a way - at least in theory - to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams is similar to the famous Stern-Gerlach effect whereby a beam of atoms passing through a magnetic field is split in two according to the atoms' spin states 《中国科学院院刊(英文版)》2008,22(1):23-23
Prof. SUN Changpu from the CAS Institute of Theoretical Physics and coworkers from University of Basel in Switzerland have worked out a way --at least in theory --to split a beam of molecules according to their chirality. The technique involves passing the molecules through three different laser beams and is similar to the famous Stern-Gerlach effect, whereby a beam of atoms passing through a magnetic field is split in two according to the atoms＇ spin states （Phys. Rev. Lett. 99 130403）. 相似文献
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《中国科学院院刊(英文版)》2014,(3):212-213
<正>In February 2014,the 30th Chinese Antarctic inland expedition team reported that they have successfully conducted the seeing measurement at the Antarctic Taishan Station using a Differential Image Motion Monitor(DIMM)developed by the Nanjing Institute of Astronomical Optic and Technology(NIAOT),Chinese Academy of Sciences.In astronomy,seeing is a physical parameter that describes the irregular movement and blur of the star 相似文献
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XIN Ling 《中国科学院院刊(英文版)》2014,(4):270-271
Amassive overhaul is coming to the Chinese Academy of Sciences （CAS）. To straighten its ＂fragmented, inefficient research＂, the academy has decided to restructure its 104 institutes for better teamwork. 相似文献
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SONG Jianlan 《中国科学院院刊(英文版)》2014,(4)
<正>DNA demethylation in mammalian zygotes,a biochemical process through which the parental genomes let go the epigenetic marks from their"past lives"to obtain totipotency,has long fascinated biologists:how does it happen?A joint team at the CAS Shanghai Institutes for Biological Sciences tells a surprising story. 相似文献
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China is one of the fastest growing economies worldwide. Are science and research also in the fast lane? We talked with LUO Yuan, scientist at the Institute of Coal Chemistry in Shanxi, and Axel Mosig, Professor at Ruhr University in Bochum, who has first-hand experience working and living in China. 相似文献
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Joachim Trümper 《中国科学院院刊(英文版)》2014,(2):201-201
<正>"In 1979 two Chinese scientists joined our institute in the framework of the historical CAS-MPG agreement.This marked the beginning of a longstanding fruitful collaboration.Many visitors followed and contributed to our scientific programs.–My first visit to China took place in 1981–with stays at CAS institutes in Bejing,Nanjing,Shanghai and Kunming,where I received unforgettable impressions of 相似文献
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《中国科学院院刊(英文版)》2014,(3)
<正>May 15,2014Publicly funded scientific research is an important means for the society to create knowledge,support innovation,and promote growth.Research articles from such research are knowledge resources to be shared by all.Their open access will facilitate the dissemination and utilization of knowledge,turn the knowledge produced by public investment effectively into innovation and development capabilities of the society,ensure that public knowledge benefi ts all,and strengthen the innovation driven development strategy.Therefore,Chinese Academy of Sciences(CAS)issues at the present stage the following open access policy for articles from publicly funded scientifi c research projects:CAS requires its researchers and graduate students to 相似文献
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《中国科学院院刊(英文版)》2014,(3)
<正>Between February and March of 2013,the source of avian-origin H7N9 human infection was discovered in Shanghai and Anhui,China.Prior to this,H7N9 has only exhibited characteristics of a low pathogenic avian infl uenza virus,carried by chickens with no known cross-species transmission.By the end of August 2013,Chinese mainland reported a total of 134 confi rmed cases of H7N9 human infections across12 provinces and 42 cities,resulting in 45 deaths.In October and November,Zhejiang Province found three new cases and Guangdong found one case of human infection,suggesting the possibility of a comeback in the fall and winter seasons.Researchers led by Prof.GAO Fu(George Fu Gao)at the Institute of Microbiology,CAS and Beijing Institutes of Life Science,have made progress on understanding 相似文献