Supervisor:
Southwest Ordnance Industry Bureau
Organizer:
Chongqing Ordnance Industry Society
Chongqing University of Technology
Chongqing University of Technology
Research on laser fuze based on time domain variable responsiveness
| DOI: | 10.11809/bqzbgcxb2024.11.009 |
| Keywords: | laser fuze; variable responsiveness; amplification circuit; target detection; anti interference; detection amplitude |
| Abstract: | At present, the dynamic range of laser proximity fuze identification is limited, about 10 dB, while the variation of far and near targets and interference energy can reach 35~50 dB.When the interference echo signal in the close range natural environment is strong, the output amplitude is saturated due to the drawbacks of traditional detectors with fixed response and high values, which can easily cause the fuze to lose its resolution ability.To improve the energy resolution of close range echoes, this paper proposes a laser fuze scheme based on time domain variable responsivity.In the preamplifier circuit, HEMT device internal resistance is used instead of ground resistance to achieve variable detector responsivity in a short period of time.Specific circuit design and simplified identification algorithm methods are provided.Simulation verification results show that the detection amplitude of close range rain and snow interference is no longer saturated. It is a new type of laser fuze anti interference measure that can distinguish targets and interference through a constant signal to noise ratio threshold at different distances. |
| Published: | 2024-11-30 |