Microarrays Of High-g Acceleration Sensor System Mechanical Reinforcement

High-g accelerometer is used in many fields, especially in military field, accelerometer is adopted in fuse system to control the penetration missiles to explode in the setting floor, monitor the impact process of nuclear blasting, and test the shock overload during the missile penetrating target. In the recent years, it's very important for the penetration missile with accelerometer which can measure high-g acceleration for the demand of penetrating hard target.This thesis is based on a pre-research project,"A research of high-g micro-array accelerometer system". This study is engaged in the mechanized reinforcement of high-g micro-array accelerometer system to finish one of the project technical index, which makes the accelerometer measure 1.5×105g~2.0×105g acceleration and insures the accelerometer work steadily with accurate signal. In this paper, there are four parts. Firstly, based on the analysis of packaging, new packaging forms are presented to achieve the technical index. After machining and testing new accelerometers, a good packaging form is determined.Secondly, qualitatively analyze the factors which influent the welding strength of ultrasonic welding, four main factors are obtained, there are welding temperature, welding pressure, welding time and welding power. In this study, the relationship between welding strength and welding temperature and relationship between welding strength and welding pressure are concerned. Different machining process parameters are proposed. After machining and testing new accelerometers, an array optical machining parameters are obtained.Thirdly, impact testing is adopted to test new accelerometers'properties. After testing and analyzing testing results, new packaging plan is proposed.Lastly, ultrasonic welding process is simulated by using finite element method. And relationship between welding strength and welding temperature and relationship between welding strength and welding pressure are achieved. Comparing experimental results with simulation results, a better array machining process parameters is given to improve the high-g accelerometer's properties.