processing technology

Wireless sensor networks as a new information access and processing technology, can widely used in national defense and military, environmental monitoring, health care, space exploration and fighting terrorism and many other fields, be considered the one of the most cheap wedding gown dresses important technology in twenty-first century. For most applications, the data which have no space-time identification has no use. Location has become essential to one of supporting technologies in sensor networks, which has been widespread concern of scholars home and custom made prom dresses abroad at present. Relatively perfect positioning technology such as GPS positioning technology, because by positioning time, positioning accuracy and the complex environmental conditions, can not be fully qualified for a full range of positioning required, particularly in the interior the flat iron shop for us environment, it is almost entirely unavailable. Therefore, the study of high-precision positioning technology has drawn greater attention, the study is to use a lot of small, lightweight and low-cost sensors to form wireless sensor networks, and even the use of sensor fusion technology to achieve the cheap ralph lauren polo shirts purpose of high-precision positioning in the interior environment.The main job of this article has four parts:1. After introduce the important role of location technologies in applications of the wireless sensor network, have discussed some issue in the current study of wireless sensor networks, such as: lack of a the flat iron shop for us more effective method of precise location, large-scale wireless sensor networks in the cumulative error and so on. Then cited four evaluation criteria about a Wireless sensor network self-positioning system and algorithm properties: positioning accuracy, scale, reference node density and node density. These evaluation criteria is a reference standard of the validity of a wireless sensor network system, they can inspect a sensor network whether or not be able to meet application requirements in a specific field.
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