超音速子弹声源定位系统设计
发布时间：2018-11-14 12:22
【摘要】：在现代城市作战中,因为狙击手具有隐蔽性好、独立性高、战法灵活等特点,能够以最小的代价对对方军队造成最大的威胁,所以及时、准确地发现敌方狙击手,对于保护我方士兵有着重要的意义。 声源定位技术具有功耗低、实时性高、便于小型化等优点,在反狙击探测系统中应用广泛。本文针对基于声达时间差的超音速子弹声源定位技术进行研究。 现代狙击步枪子弹在激发的瞬间会在枪口产生爆轰波,激发后弹丸以超音速在空气中飞行,会在子弹的周围形成“N”形波。本文研究了基于爆轰波和“N”形波信号声达时间差的声源定位方法；根据这两种信号不同的特点,探讨了基于互相关的爆轰波到达声传感器阵列中各声传感器的时延估计方法,提出了基于模拟信号处理器的“N”形波到达各声传感器的时延估计方法。 在硬件系统设计中,采用十六位超低功耗微芯片MSP430x5xx作为控制器,实现了基于FLASH的定位记录存储功能；设计实现了键盘和LCD显示模块,以表盘的形式显示定位信息,用户可以对以往定位记录进行查看并可对系统进行设置；设计实现了实时时钟模块,为系统提供日期和时间信息；设计实现了系统的温度传感器模块,实时测量定位系统所处环境的温度,利用测得的温度对声速进行补偿,提高定位精度。 在论文的最后对提出的爆轰波和“N”形波时延估计算法进行了仿真测试,并对仿真结果进行了分析。仿真结果显示,提出的爆轰波和“N”形波时延估计方法能够实现比较准确的时延估计。
[Abstract]:In modern urban warfare, because snipers have the characteristics of good concealment, high independence, flexible tactics, and so on, they can pose the greatest threat to the opposing forces at the lowest cost, so they can be found in time and accurately. It is of great significance to protect our soldiers. Sound source location technology is widely used in anti-sniper detection system because of its advantages of low power consumption, high real-time performance and miniaturization. In this paper, the supersonic bullet sound source location technology based on time difference of acoustic arrival (ATD) is studied. Modern sniper rifle bullets will produce detonation waves at the muzzle at the moment of firing. The projectiles will fly in the air at supersonic speed after firing and form "N" waves around the bullets. In this paper, the acoustic source location method based on the time difference of acoustic arrival between detonation wave and "N" wave signal is studied. According to the different characteristics of the two signals, the method of estimating the time delay of each acoustic sensor in the array of acoustic sensors by detonation wave based on cross-correlation is discussed. A time delay estimation method based on analog signal processor for "N" wave arrival of acoustic sensors is proposed. In the design of the hardware system, the 16-bit ultra-low power microchip MSP430x5xx is used as the controller to realize the location record storage function based on FLASH. The keyboard and LCD display module are designed and implemented to display the positioning information in the form of a dial. The user can view the previous positioning records and set up the system, and the real-time clock module is designed and implemented to provide the date and time information for the system. The temperature sensor module of the system is designed and realized. The temperature of the environment in which the positioning system is located is measured in real time. The measured temperature is used to compensate the sound velocity and the positioning accuracy is improved. At the end of the thesis, the proposed algorithms for estimating detonation wave and N shape wave are simulated and the simulation results are analyzed. The simulation results show that the proposed method can estimate the detonation wave and the "N" wave delay accurately.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：E939;TP368.1
本文编号：2331146
[Abstract]:In modern urban warfare, because snipers have the characteristics of good concealment, high independence, flexible tactics, and so on, they can pose the greatest threat to the opposing forces at the lowest cost, so they can be found in time and accurately. It is of great significance to protect our soldiers. Sound source location technology is widely used in anti-sniper detection system because of its advantages of low power consumption, high real-time performance and miniaturization. In this paper, the supersonic bullet sound source location technology based on time difference of acoustic arrival (ATD) is studied. Modern sniper rifle bullets will produce detonation waves at the muzzle at the moment of firing. The projectiles will fly in the air at supersonic speed after firing and form "N" waves around the bullets. In this paper, the acoustic source location method based on the time difference of acoustic arrival between detonation wave and "N" wave signal is studied. According to the different characteristics of the two signals, the method of estimating the time delay of each acoustic sensor in the array of acoustic sensors by detonation wave based on cross-correlation is discussed. A time delay estimation method based on analog signal processor for "N" wave arrival of acoustic sensors is proposed. In the design of the hardware system, the 16-bit ultra-low power microchip MSP430x5xx is used as the controller to realize the location record storage function based on FLASH. The keyboard and LCD display module are designed and implemented to display the positioning information in the form of a dial. The user can view the previous positioning records and set up the system, and the real-time clock module is designed and implemented to provide the date and time information for the system. The temperature sensor module of the system is designed and realized. The temperature of the environment in which the positioning system is located is measured in real time. The measured temperature is used to compensate the sound velocity and the positioning accuracy is improved. At the end of the thesis, the proposed algorithms for estimating detonation wave and N shape wave are simulated and the simulation results are analyzed. The simulation results show that the proposed method can estimate the detonation wave and the "N" wave delay accurately.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：E939;TP368.1
【参考文献】
相关期刊论文 前2条
1 石岚;王宏;;国外反狙击手光电探测技术与装备[J];光电技术应用;2010年04期
2 孙耀峰;;美国反狙击手探测系统发展现状[J];轻兵器;2010年22期
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