Design And Optimization Of Shock Wave Target System Using Acoustic Positioning

The shooting level of soldiers is related to the modernization of the army,and the manual reporting method is currently used for shoot training.There are many disadvantages,such as poor security,prone to false alarms and even underreporting.The automatic target reporting system,using the relevant signals to locate the impact point,can not only save a lot of manpower and material resources,but also greatly improve the training efficiency,and has great application prospects.Therefore,based on the acoustic positioning theory,the paper designed a shock wave automatic target reporting system and set up the system test bench.Through reviewing the references,the accuracy of automatic target reporting system largely depends on its sensor array parameters.Then,the paper designs the simulation and optimization of sensor array parameters for the target reporting system,and has some controlled experiments to verify the result of optimization.The main work of this paper is as follows:In the first chapter,the application background and research significance of automatic target reporting system are introduced,especially the shock target.The existing target reporting system has many limitations in terms of accuracy,applicability and cost,the paper proposes to design an automatic target reporting system based on acoustic positioning.In the second chapter,the formation process of the shock wave and its spectral characteristics are briefly explained.And several positioning mathematical models,such as triangulation positioning,trilateral positioning,and multipoint positioning,are comprehensively compared.Based on the multipoint positioning model,the position model using TDOA(time difference of arrival)and the corresponding solution method is determined.Several delay estimation algorithms are compared and analyzed.Considering all factors such as calculation amount and hardware requirements,the correlation analysis method with a small amount of calculation is selected.In the third chapter,the overall structure of shock wave target system and its functional modules are specifically designed based on the principle of shock wave target,including the selection of acoustic sensors,the design of signal pre-processing circuit(including preamplifier circuit and signal filter circuit)and the design of the data acquisition module.In the fourth chapter,several common sensor arrays used in automatic target reporting systems are introduced,such as L-shaped,seven-point linear and square planar arrays,and their related principles and applicable scenarios are briefly introduced.Considering the actual application,we should mainly focus on the target reporting accuracy of the core bombed area in the design process.So the optimization for sensor array has been proposed.The paper designs the corresponding simulation experiments using the original square plane.The optimized array and related array parameters were obtained.In the fifth chapter,we explain the technical parameters and experimental conditions of the verification experiment.And the signal process is briefly introduced.By processing the shock signals,the signal delay parameters can be obtained.And the positioning model is obtained to obtain the coordinates of the impact point.Using the original and optimized array,we designed a set of control experiments.Comparing with the results of the two arrays,the effect of the optimized sensor array was evaluated.In the last chapter,the completed work is summarized.The current results and deficiencies of the research are analyzed.The results and limitations of the research are analyzed.And several suggestions for further research are put forward.