Study With Magnetic Composite Detection Technology

This subject belongs to a miniaturized weapons system including real-time battlefield information acquisition, target identification, network communication, and implementation of a variety of modes of target attack. It will play an important role in the fortress defense, the resident on duty as well as anti-terrorism operations.Seismic and magnetic combined detection has advantages of both the seismic signal detection and magnetic signal detection. In this system, seismic sensor is used as early warning, and magnetic sensor detection circuit would be awakened after any targets being detected. Therefore, the two kinds of sensors can be used to realize combined detection, and the target type and motion state can be obtained by multi-sensor data fusion.The hardware design includes seismic signal detection circuit, magnetic signal detection circuit and wireless communication circuit. The software design includes the interface driver design between microprocessor and chips, seismic and magnetic signal data acquisition program design, wireless communication program design.In order to facilitate the signal feature extraction, some data preprocessing algorithms and the normalization processing algorithm for magnetic signal has been analyzed. Several signal characteristics has been introduced and the signal feature extraction methods designed. Finally, recognition program of ground targets has been designed.A series of experiments have been carried out to verify the function of system. Experiment results show that the seismic signal acquisition circuit and the magnetic signal acquisition circuit can collect the target signals effectively, and wireless communication module can work normally within a distance range of200meters, a shorter transmission delay can achieved when the amount of data transfer is less than100Bytes.