Three-dimensional space wireless sensor network non-range positioning system and method thereof

Abstract

The invention relates to a system and a method for positioning nonmeasured distance of a wireless sensor network in a three-dimensional space. The system comprises a sensor node and an anchor node; the sensor node is provided with a microprocessor; the microprocessor is connected with a Zigbee radio-frequency communication module, a memorizer, a power module and a sensor acquisition module respectively through a bus and a data wire; the microprocessor is provided with an expanded serial port, a clock circuit, and a resetting circuit which are connected with the microprocessor; and the anchor node is provided with a microprocessor and a GPS positioning device, a GPS antenna, the memorizer and a power supply connected with the microprocessor. The method receives beaconing information from the anchor node by the sensor node, carries out the positioning of the nonmesured distance of the wireless sensor network in the three-dimensional space, does not need any information exchange between the wireless sensor nodes, reduces communication expense, does not need to measure the information of distance between nodes, does not need to add extra distance measuring equipment, reduces cost, adopts simple and effective algorithm, reduces calculation amount, and is easy to realize.

Description

(1) Technical field: [0001] The invention relates to the technical field of self-positioning of wireless sensor network nodes, in particular to a distance-independent three-dimensional wireless sensor network positioning system and a node positioning method. (two) background technology: [0002] At present, the research on wireless sensor network is increasing day by day. This kind of network is widely used in disaster relief, target tracking, auxiliary medical treatment and so on. In these applications, the first thing we need to know when an event occurs is where the event occurred. Therefore, the wireless sensor network should first provide the location of the sensor nodes, otherwise the collected information will be meaningless. [0003] Existing positioning methods can be divided into ranging-based positioning algorithms (TOA, TDOA, AOA, RSSI, etc.) and non-ranging positioning algorithms. Among them, TOA, TDOA, and AOA methods need to install additional hardware device...

AI Technical Summary

Problems solved by technology

[0007] The wireless sensor network positioning method introduced in the literature has the following disadvantages: the mobile anchor node needs to be installed on the aircraft carrier, which needs to consume additional energy; it is difficult to control the aircraft strictly in a straight line; the mobility of the anchor node will affect the transmission of wireless signals. Generate irregularities and affect positioning accuracy

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