Human Body Taget Recognition System Based On Pyroelectric Wireless Sensor Network

The important detection part of human body taget recgnition is the detectionand understanding of human body motion. Its meaning is mainly to identify andtrack people’s motion in order to distinguish the objective’s behavior.Human movement taget recognition technology is a common involved keytechnology in advanced man-machine interfaces, human motion analysis,intelligent monitoring and other fields.A physical characteristic of pyroelectric infrared sensor is sensitive tohuman body infrared radiation with specific wavelength, so it is suitable for thehuman body taget recognition field. Using infrared sensor to design a highprecision human body taget recognition system of wireless sensor network isstudied in the dissertation. The main research contents and methods can besummarized as follows:First, the structure, principle and characteristics of pyroelectric infraredsensor, as well as the original human body taget recognition method based onpyroelectric infrared sensor are introduced. In addition, a new human body tagetrecognition method is proposed. The three pyroelectric infrared sensors areplaced in these three points of the equilateral triangle. Then multiple sub areasare divided based on the node intersection induction zone. Finally, calculate thecoordinate information of the human body through data information acquiredfrom the nodes.Second, Zigbee wireless technology is introduced, including technicalparameters, network system and network topology. Based on features of Zigbeewireless technology, a monitoring terminal is designed and wireless networktransmission is implemented.Third， The pyroelectric sensor nodes have been designed in the article. A wireless network need be build with three sensor nodes at least, and each sensornode is composed of motherboard, the sensor module and the Zigbee module.Furthermore, the protocol gateway and monitoring terminal have been designedto achieve the data transmission and monitoring.Finally, BP neutral network is adopted to analyze and process the humanmotion information collected by the pyroelectric sensor, and calculate the humanbody taget recognition system recognition rate.