Analog / Digital Signal Processing Technology In The Proximity Fuze Applications

In traditional radio fuse used for projectile in China, to control burst time, the amplitude of Doppler signal of target were been applied for signal process circuit. The shortcomings of using this signal are large disturbance of burst point, low efficiency of fuse-projectile cooperation and low anti-jamming ability. In the modernize war condition, to improve the efficiency of radio fuse, it is emergent to solve above problems.In this thesis, according to the principle of Doppler effect, a new method which take advantage of many Doppler frequency information such as projectile-target distance, speed, stance for signal processing in radio fuse was been put forward to. All above information as well as amplitude was synthesized to control the burst time, aiming at control the fuse burst at the best burst area and greatly improve anti-jamming ability.Studies been fulfilled in this thesis include the selection of Doppler frequency characteristic signal, mainly apply frequency and frequency change rate, fuse overall design based on analysis of related signal and analog-digital processing circuit, design of amplitude signal acquisition circuit, frequency signal acquisition circuit, signal filter and pre-process circuit, power supply circuit and execution circuit, design of software, simulation test and results analysis.According to simulation test of the achievements of the research, shortcomings of traditional radio fuses were been solved. It has been applied in the research of a new proximity fuse for navy and has very good performance.