A Research And Design Of Target Detection And Identification Based On Wireless Sensor Networks

The target detection and identification system based on wireless sensor networksintegrated signal analysis and processing and wireless communication。 withlarge-scale, integrated, dynamic and self-organizing features，it plays an increasinglyimportant role in the daily production and life and military fields.In this paper, based on research projects need to study we design a system todetect and identify effective, easy to operate, wide application, high degree ofautomation of the sensor detection and recognition system. Not only meet the needs ofthe research project, but also because with good versatility, there are good prospectsfor promotion.According to demand, the selected alternate magnetic, sound, vibration, andinfrared sensors. Reference works each sensor, the signal pickup mechanism andMCU computing power, it will be divided into two parts, the sensor system, they areinfrared-sound node detection system and magnetic-vibration node detection system.By comparison the most commonly used wireless communication standards, Zigbeehas low complexity, low power, low cost, two-way wireless communication and otheradvantages, this system is suitable for wireless communication module.In signal processing, the output of sound，infrared and magnetic as the level ofthe sensor signals are processed to detect the presence of the target person or thevehicle. The output signal of the vibration sensor for filtering, amplification and A/Dconversion, the output signal is analyzed to identify the target by the host computer.Due to the large amount of information and data collected by the sensor, Zigbeemodule for data processing is limited. So the MCU unit, optional STM32F103ZET6as chips, the input data was analysis by short-term energy ratio and cepstral, thenthese two finished processing simple data transfer via Zigbee to the coordinator, andthen through the host computer to distinguish targets.