Wireless sensor network node position finding process based on range measurement
A wireless sensor and network node technology, applied in positioning, radio wave measurement systems, instruments, etc., can solve the problem of low positioning accuracy and achieve the effect of improving positioning accuracy and reducing positioning errors
Inactive Publication Date: 2008-06-04
浙江中科智远创业投资有限公司
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Problems solved by technology
This positioning method can be applied to the existing wireless sensor network node platform, but this method is easily affected by environmental factors such as temperature, humidity, obstacles, multipath, etc., and the positioning accuracy is not high
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[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0026] The wireless sensor network consists of many randomly distributed sensor nodes SN with unknown positions and at least three anchor nodes AN with known positions, one of which can act as a gateway node to communicate with the background positioning center. In this embodiment, there are three anchor nodes AN1, AN2, and AN3 whose position coordinates are known, and the anchor node AN1 communicates with the background positioning center as a gateway anchor node, and its coordinates are The coordinates of the anchor node AN2 are The coordinates of the anchor node AN3 are The location of the node SNn to be tested is unknown, as shown in Figure 1 for details.
[0027] As shown in Fig. 2, the wireless sensor network node location method provided by the present invention begins with three anchor nodes AN1, AN2, and AN3 whose positions are k...
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The invention relates to a method for positioning wireless sensor network nodes on the basis of the ranging technology, comprising at least three positioned anchor nodes, a node to be detected and background positioning center. The invention is characterized in that: 1) the positioned anchor nodes periodically sends beacon signals for positioning at a fixed frequency; 2) the node to be detected sends the receiving signal intensity for receiving the beacon signals to a gateway anchor node; 3) the gateway anchor node transmits the receiving signal intensity of the node to be detected and the transmitting signal intensity of the anchor nodes to the background positioning center; 4) the background positioning center calculates the distances between the node to be detected and the anchor nodes; 5) the background positioning center calculates the coordinate of the node to be detected. The invention calculates the distances between the node to be detected and the anchor nodes according to the difference between the transmitting signal intensity of the anchor nodes and the receiving signal intensity of the node to be detected and positions the coordinate of the node to be detected according to the differences between the distances from the node to be detected to the anchor nodes, thereby reducing the positioning error and improving the accuracy of the positioning.
Description
technical field [0001] The invention relates to a wireless sensor network node positioning method based on ranging technology. Background technique [0002] Wireless sensor networks can be applied to areas where wiring and power supply are difficult, where people cannot reach (such as polluted, environment cannot be destroyed or hostile areas), and some temporary occasions (such as natural disasters, fixed communication networks are destroyed) and so on. It does not require fixed network support, has the characteristics of rapid deployment and strong invulnerability, and can be widely used in military, industrial, transportation, environmental protection and other fields, especially for military applications, target tracking, environmental detection, space exploration, wireless sensor networks advantage is becoming more and more obvious. [0003] By deploying a large number of wireless sensors to the target area to form a network, each wireless sensor is called a node of th...
Claims
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Inventor 夏鹏孙路姜鹏杨宇徐勇军
Owner 浙江中科智远创业投资有限公司