Research On Automatic Target-Scoring System Of Humanoid Solid Target Based On Projectile Shock Wave

In view of the development demand that the shooting training of light weapons should be close to actual combat,this thesis studies a humanoid stereo target automatic target reporting system for indoor and outdoor shooting training of light weapons.The system has the characteristics of strong adaptability to environment and can avoid being destroyed in shooting training as much as possible.By analyzing the realization way and principle of the commonly used automatic target system,considering that the impact point calculation of humanoid stereo target needs three-dimensional mathematical model,the sound source localization method is finally chosen.Firstly,the principle and transmission characteristics of projectile shock wave are analyzed,and the mathematical model of projectile launching at any Angle is established by combining the geometric relationship between impact point and sensor space,that is,the spatial acoustic location model of five-element cross array,and the time delay method is used to calculate the impact point coordinates.The basic design principle of the humanoid stereo target automatic target system is as follows: the shock wave is formed during the projectile movement,and the shock wave is received by the sound detector to excite the pulse signal,realizing the conversion of sound signal to electric signal.Each signal is amplified,filtered and other circuits,so that the effective signal is amplified and retained,interference and noise are shielded.The signal passes through A/D conversion circuit,so that the initial sound signal is finally sent into the digital signal processing unit composed of MCU and CPLD in the form of digital signal,which is used to extract,latch,read,convert and transmit the time difference between various signals.SCM will extract the data sorting and packaging,through wireless transmission to the upper computer.At the same time,receiving the control command of the onboard plane,completing the explicit and implicit stress setting,and realizing the stress response such as pitching,yaw,starting and falling target,acceleration and so on.After receiving the data,the mathematical model built by the system is combined with the sensor arrangement,the coordinate of the impact point is calculated,and the coordinate is compared with the pre-stored target data to confirm the name of the target information,such as the number of rings or the simulated human body part.This thesis studies the overall scheme of the system,and designs the software and hardware respectively.The first stage includes sensor selection,signal processing circuit,time difference acquisition circuit based on CPLD and MCU control circuit.The lower computer and the upper computer transmit data through the communication module.The software design of the upper computer includes data collation and impact point calculation.Through the simulation test of the four-element cross array acoustic positioning model and the five-element cross array acoustic positioning model,the five-element structure is verified to have more advantages.Through the test of the circuit board and the software simulation of the CPLD time difference acquisition module,the feasibility of the theoretical research scheme is verified.