您正在查看 "Wsn Related" 分类下的文章 2007-05-07 11:53 http://www.cyclopscamera.com/
Cyclops is a digital camera for wireless mesh networks. It captures and processes low-resolution monochrome and color images. Images and image features are transmitted through the network with MICA2 and MICAz radio motes manufactured by Crossbow Technologies Inc.
Cyclops was jointly developed by Agilent Laboratories and the Center for Embedded Network Sensing at UCLA.
由于我自己研究的兴趣所在，因此我觉得它还是非常有意思的一个小东西:)
UCLA已经让一个公司Pentar代理销售了，不过目前仅用于科研，不用说，这也将会成为我们国内廉价节点的效仿对象，让我们拭目以待。 |
2007-05-05 14:11 传感器网络模拟和仿真实验里，网络播撒分布模型一般选择均匀分布或高斯分布，二维均匀分布用系统的rand函数实现即可，但是二维高斯分布就不是那么简单了。目前，找到的最简单的方法是使用GNU的GSL库。
http://www.gnu.org/software/gsl/ 主页
http://www.gnu.org/software/gsl/manual/html_node/ 文档
http://www.gnu.org/software/gsl/manual/html_node/The-Bivariate-Gaussian-Distribution.html 函数说明
这样就可以编写一段小程序，为NS2和TOSSIM等模拟器提供节点的初始位置信息。 |
2007-05-05 12:01 http://research.sun.com/spotlight/SunSPOTSJune30.pdf
doc
http://gceclub.sun.com.cn/download/JavaChina2005/Java_ME/Sun_Spots.sxi (OpenOffice file)
slides
http://frsun.downloads.edgesuite.net/sun/07D00952/sun-labs-tour_29.swf（Sun Labs Virtual Tour)
个人感觉：比Mote编程方便；推广速度太慢（目前只供应北美）；推出的几个Demo应用实在有些……（Sun和Google等公司仍然应该向中国Yahoo的小马哥学习一下如何炒作）；如果不买这套设备竟然没法了解任何信息，不像Tinyos至少还可以玩玩模拟器...
ps: 刚Email联系了Sun的GG，答复是：
Hello,
We do not have a simulator yet and we have not made our code open source yet. However, we would like to do both. Stay tuned. Until then, the best we can offer is the Java Doc which you can look through at:
Enjoy |
2007-04-27 14:35 http://embedded.ece.uci.edu/~kilby/research.htm
这个博士生（课题组）工作主要是硬件设计，非常有趣有意思的话题。
1.小型微型化的通信节点设计：国内一般的工作无非就是仿制节点，按照一个长期做硬件的同学说这样的工作只要有点底子都可以做，难度并不大，本身并没有多少的技术含量，无非是因为xbow的节点比较贵，某些机构瞄准了这个市场做些噱头而已。这个组的小型微型化节点做的非常有意思，而且第二代比第一代的节点有了更好的设计。我们能不能做呢？
2.应用型传感器节点的设计：主要就是ECG（心电图？）监控和摄像头传感器的节点，前者在codeblue里也出现过，不过这里他们结合了自己的微型化节点。这两个传感器节点应该说国内还是空白的，不知道能不能做呢？
3.能量供应系统的设计：应用了风力和大容量电容（这个能用来供电？土了...）来供电，很有意思的解决了问题。目前实验床一般都是拿交直流变压转换来供电，这个我们已经实现了，但是诸如风力，太阳能，震动（这个电能低有可能不行）这些供电方式，应该做出来也很有趣。
不过，感觉这个项目组和DARPA的军事应用很贴近，貌似真的撒一把就能用，呵呵。
http://www.newtraxtech.com/
把传感器装在Mesh节点上，是啊，为什么拘泥于小节点呢？他们的Demo网页也非常有创意。Mesh Sensor Node, 和Google Map的结合，本身不是什么新点子，已经在UCLA最新的技术报告中看到了，我觉得这才是民用化的节点。小节点不过是创造了一个能量受限的大坑，然后让大家在这里找些小坑，申请项目，做做论文，意义真不知道有多大。 |
2007-04-17 14:05 http://www.djstein.com/projects/WirelessSensorNetworkSimulator.html
I didn't test it, but I think it is only suitable for some algorithms that pay little attention to the performance of routing and MAC layer. However, we can still try to improve it for more interesting work since it is a open source software. |
2007-04-13 17:27 Very simple for someone, here I just find some codes and want to backup them here.
http://www.codeproject.com/cs/media/Motion_Detection.asp (the best one)
http://www.codeproject.com/useritems/BossWatcher-Motion_Detect.asp
http://www.codeproject.com/cs/media/motion_detection_wc.asp
I think it is just a prototype of multimedia SN, but maybe some other names...whatever... |
2007-04-06 16:09 http://www.vinnotech.com/index.asp
http://www.helicomm.com.cn/
an introduction:
"Build A Wireless Network Platform for Chinese Home"
http://www.helicomm.com.cn/showwls.asp |
2007-04-03 16:19 2007-03-30 20:32 In the lastest meeting of 1039 Ph.D Salon (A free research group comprised of Ph.D. candidates from CSE, Beihang University. All of us do some research related to wireless network), Someone asked me about large scale simulation for Adhoc like networks. So I searched on the Internet, and asked someone for help on the Communication board of SMTH.ORG BBS.
That's the answer --
JiST / SWANS
Java in Simulation Time / Scalable Wireless Ad hoc Network Simulator
http://jist.ece.cornell.edu/index.html
But I didn't test it... |
2007-03-28 23:34 2007-03-21 10:03 无线通信的研究热点: Wireless Sensor Network, Mesh, Cognitive Radio, RFID,WiMax, Bluetooth, WLAN (差不多按照热点依次排列的)
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31.
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A survey on sensor networks
Akyildiz, I.F.; Weilian Su; Sankarasubramaniam, Y.; Cayirci, E.
Communications Magazine, IEEE
Volume 40, Issue 8, Date: Aug 2002, Pages: 102- 114
Digital Object Identifier 10.1109/MCOM.2002.1024422
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43.
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Sensor networks: evolution, opportunities, and challenges
Chee-Yee Chong; Kumar, S.P.
Proceedings of the IEEE
Volume 91, Issue 8, Date: Aug. 2003, Pages: 1247- 1256
Digital Object Identifier 10.1109/JPROC.2003.814918 |
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85.
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MAC protocols for wireless sensor networks: a survey
Demirkol, I.; Ersoy, C.; Alagoz, F.
Communications Magazine, IEEE
Volume 44, Issue 4, Date: April 2006, Pages: 115- 121
Digital Object Identifier 10.1109/MCOM.2006.1632658 |
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2007-03-20 20:53 http://openwsn.googlepages.com/
You can visit it for more. I think it is just another hardware implementation like the mote of xbow. And the team members try to do something like "Tinyos in China"(Open Source System Supporting Software). Unfortunately, it seems that the website and the whole work are at the very begining. So, We should wait for more interesting points... |
2007-03-14 14:15 2007-03-07 8:39 Multi-Channel Sensor Board
Defense & Security Symposium / Booth 1351
Phone: (970) 224-2556
A new compact, five-channel sensor board from Information System Technologies is designed for real-time sensor-level signal processing in large wireless sensor network environments. The high-performance sensor board provides has an onboard field programmable gate array (FPGa) and memory that allow for efficient implementation of flexible system structure and advanced signal-processing algorithms. An onboard radio provides added capability for self-localization. This technology overcomes the bandwidth and processing limitations in large wireless sensor networks, which may be deployed for real-time situation awareness and surveillance applications.
The sensor board can be interfaced with commercial Zigbee-based devices, e.g., motes. The system currently supports acoustic and seismic input signals, although it can be configured for other types of sensory inputs. Applications include acoustic localization and tracking of moving vehicles and gunshot detection, localization and classification. The system is suited for small fixed or moving sensor platforms, such as helmet-based systems.
from:http://www.photonics.com/content/tradeshows/2007/March/1/86637.aspx |
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