Research On Target Detection Technology Based On Wireless Sensor Network

Battlefield sensor detection is a real-time monitoring system that utilizes many advanced detection means of vibration, acoustic, magnetic, infrared sensor array and information processing equipment comprehensively. In addition, wireless sensor networks that integrating sensors,a central control module and wireless communication networks are information of a new acquisition and processing technology, according to the target detection techniques based on Wireless sensor networks were studied in this paper.The actual research status and developing current of the study at home and abroad are summarized in this paper. The system design program is put forward, the characteristics of the four target signals: acoustic signal, vibration signal and magnetic signals, infrared signals are analyzed detailly in the terms of the mechanism and the curve characteristics. Then the target detection circuits are designed for different sensor signals on the basis of weak signal detection theory, four kinds and different state signals of sensor arrays were tested by the typical goals (person and vehicles). The target signal detection methods are discussed particularly by analyzing the target signal, in other words, the typical targets of the person and car are studied in the terms of five aspects: presence, movement detection, speed detection, target identification and the objectives positioning and direction. The methods of the threshold detection and the energy extraction are put forward for magnetic and infrared signals, the method of the signal frequency extraction is proposed for the acoustic signal and vibration signal. These detection methods are mainly focused on the application of engineering, so it is easy to implement in a smaller system. Finally, the micro-array sensor system integration is completed according to requirement of micro-size system.The accuracy of analysis of the signal characteristics is outlined in the paper by experiments, lots of experiments on the objects detection circuit are described, the practicality,reliability of the detection circuit and the superiority of detection method are confirmed by the results of experiment.