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基于TC35i和C8051F020的远程数据采集系统 总被引:1,自引:0,他引:1
本文提出了一种用混合信号系统级单片机C8051F020控制GSM网络引擎TC35i实现远程数据采集的方案.在描述了远程数据采集系统原理、构成和功能的基础上,对无线通讯模块及硬件和软件设计部分也进行了详细介绍. 相似文献
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本文设计并实现了基于三层网络结构的远程无线数据采集系统。该系统集数据采集技术、嵌入式系统、无线网络、数据库技术及互联网于一体,采用自定义网络协议,以单片机作为前端数据采集核心,通过2.4 G无线传输,应用数据库及互联网技术,实现了基于互联网络中任一终端经确认许可可以访问数据采集节点任一传感器信息。 相似文献
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本文设计了一种基于GSM的配网自动数据采集系统,利用GSM模块(TC35i)和AVR单片机实现了配电网的远程无线数据采集方案。利用GMS通信技术在数据传输方面的优势,使系统具有较好的可行性和较高的性价比。系统主要检测了柱上开关、变压器和小区变电站的电压、电流、电量和功率因数等参数,本系统提高了配电网的自动化程度,具有很广阔的发展前景。 相似文献
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基于CAN总线的有效载荷温度测控系统 总被引:1,自引:0,他引:1
温度是有效载荷系统设计中的一个重要参数,针对空间粒子探测器阿尔法磁谱仪(AMS),介绍一种基于CAN总线的分布式有效载荷温度测控系统。系统采用数字式温度传感器DS18S20作为温度检测元件,以单总线实现远程数据采集模块的多点温度检测。基于探测器的地面测试系统,实验分析了数字式温度传感器空间应用的可靠性,并从软硬件角度提出了改善系统可靠性和测量精度的方法。 相似文献
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为了实现在军工业、农业、医疗和交通中的远程监控功能,本文设计了基于FPGA的多节点无线振动传感器网络。本系统是在FPGA基础上对SOPC进行软硬件设计,通过FPGA对多个Zig Bee网络节点进行数据采集与控制,能够使振动传感器的数据传输到上位机。经试验验证,本系统的测量精度高、灵敏度线性度好,具有广阔的应用前景。 相似文献
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介绍了卫星移动通信系统的概念、类型、用途和系统组成,概述了卫星移动通信系统在我国话音业务、低数据采集业务和高数据采集业务中的实际应用。 相似文献
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文章针对目前多数射频监测技术只适合短距离的缺点,提出一种射频网络与GPRS相结合的远距离无线监测系统设计方案,重点介绍系统软硬件的设计,以ARM7芯片S3C44BOX为核心构建基站,以51系列STC89C52RC单片机为核心构建射频传感网络采集节点,各节点与基站的通信由NRF905射频收发模块来实现。文章还对射频传感网络的拓扑结构和通信协议进行了设计,成功解决了射频传感网络中的冲突检测、隐藏节点等问题,保证了系统的可靠性。最后进行了通信测试实验,证明了方案的可行性。 相似文献
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卫星光学遥感系统优化设计与像质评价探讨 总被引:1,自引:0,他引:1
介绍了卫星光学遥图像获取与图像处理一体化优化设计的思路;运用通用像质方程(GIQE)对于利用小相对孔径光学系统和调制传递函数补偿(MTFC)方法得到的图像的品质与利用相对较大相对孔径光学系统得到的图像的品质进行了对比分析。 相似文献
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马文坡 《运载火箭与返回技术》2007,28(4):23-27
介绍了卫星光学遥图像获取与图像处理一体化优化设计的思路;运用通用像质方程(GIQE)对于利用小相对孔径光学系统和调制传递函数补偿(MTFC)方法得到的图像的品质与利用相对较大相对孔径光学系统得到的图像的品质进行了对比分析。 相似文献
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With the rapid advancement in remote sensing technology and corresponding applications, the Earth Observation Ground Segment has undergone a significant change at NRSA. From dedicated data acquisition and processing systems, we have realized multi-mission data acquisition quick look and browse systems and also multi-mission integrated information management systems. Front end of data reception station has been upgraded to handle wider bandwidth and data rates up to 320 Mbps for near future missions such as the Radar Imaging Satellite (RISAT). Antenna, feed, down converters and RF chain have been upgraded. To cater to multi-mission scenario mission independent, fully configurable demodulator/bit synchs have been deployed. For handling data acquisition in multi-satellite scenario where in data from 5 to 6 remote sensing satellites are to be received almost simultaneously, automation of operations has been incorporated towards station configuration to avoid manual errors. From media-based data handling, there has been a shift towards net centric data handling among the various work centers such as user order processing, data processing systems, special processing systems, data quality evaluation, and product quality control work centers. The turn around time for dissemination of user desired data products has been improved from two weeks to one day. Presently a state of the art integrated environment has been envisaged which will bring down the turn around time for the supply of data products significantly. Automation has been incorporated at both data acquisition and data processing to improve the product throughput. Presently NRSA is catering to a demand of about 30,000 data products per annum and in the next two years it is aimed to reach a level of 50,000 products per annum by realizing the integrated multi-mission ground system for earth observation (IMGEOS). This will significantly modify the entire data production and dissemination chain so that data can be made available to user within 1 h from data acquisition at Shadnagar in some cases. Some of these novel developments planned in the near future will be discussed in this paper. 相似文献
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遥感影像的预处理工作是遥感数据应用的基础。去除云雾是影像预处理工作的重要组成部分。针对遥感影像雾霾浓度分布不均匀的问题,提出一种改进的暗通道遥感影像去雾方法。以"高分一号"(GF-1)卫星为例,根据影像灰度图中的灰度值对影像雾霾浓度区域进行划分,对每个区域中暗原色值的获取方式进行改进,使用导向滤波优化大气传输率,以归一化植被指数(NDVI)为基础,设计用于评价影像去雾质量的定量指标。结果表明:所提出的方法能明显去除雾霾干扰,有效改善卫星影像数据的视觉效果,增强影像细节。该方法去雾处理后的遥感数据能应用于定量遥感,提高遥感影像的可用性及有效性。 相似文献
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《中国航天(英文版)》2018,(4)
Ocean sound speed profile(SSP) is the key factor affecting acoustic propagation. The acquisition of SSPsin real time with high precision is meaningful for underwater activities. By means of the remote sensing method, thesea surface data could be obtained in near-real time. Typically, the subsurface fields are correlated with the sea surfaceparameters. Thus, the SSPs could be obtained by means of satellite remote sensing. In this paper, the history as wellas the current research over the reconstruction of subsurface fields by means of sea surface data is introduced. Thentwo methods to reconstruct the SSPs with sea surface data, including the linear regression method using the empiricalorthogonal function, and the self-organizing method based on the big data theory, are described in detail in the paper. 相似文献