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Laser Proximity Fuze Signal Processing Technology Based on DSP

Author: SunChuanPeng
Tutor: ZhaoYuan
School: Harbin Institute of Technology
Course: Optics
Keywords: Laser proximity fuze DSP (digital signal processor) Hardware platform
CLC: TJ439.2
Type: Master's thesis
Year: 2007
Downloads: 218
Quote: 1
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Abstract


Laser proximity fuze has been widely applied to military field, With combat weapon performance continues to improve and the complexity of the environment of the laser proximity fuze Distance Precision put forward higher requirements. This paper design a hardware platform based on the DSP (digital signal processor) processing the target echo signal and digital processing technology to improve the laser proximity fuze Distance Precision. Draw on the thinking of the communication field of software-defined radio, in this paper, the software based laser concept and software laser proximity fuze proximity fuze echo signal processing system of modular design, design and processing based on TMS320VC5502 chip and sampling rate of 100MHz The hardware platform of the processing of the echo signal. This platform and traditional laser proximity than Fuze signal processing system circuit design is more concise, more modular, so as to facilitate the fuze system upgrades and shorten the fuzing system design cycle. On the basis of the analysis of laser proximity fuze transmitter, a mathematical model of a transmitted signal is nearly Gaussian pulse. Discussion of the target surface slope, the role of the area and reflectivity factors caused a broadening of target echo and distortion Finally, the simulation of several typical target echo waveform. The simulation approach and way of digitizing algorithm simulation results show that the digitized measurement error is smaller than analog. Measurement error minimum waveform centroid algorithm based on the processing of digitized paper to design a \When the sampling rate of 1GHz, signal-to-noise ratio of 8dB, role distance of 45m, the pairs of feet \Waveform data sets using sampling rate of 1GHz DSP development board test experiments, the measurement results are consistent with the simulation results. Finally, the completion of principle experiment based the hardware platforms laser proximity fuze target echo waveform acquisition and digital processing. Experimental results show that: the \measurement error in the hardware platform is 4.5m. Simulation and the experimental results show that the paper design of the hardware platform and the \

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CLC: > Industrial Technology > Arms industry > Ammunition, fuses, pyrotechnics > Fuse > Other fuse > Laser fuze
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