The Research And Design Of Acoustic Emission Target Positioning System

Target shooting is indispensable no matter whether in military activities or in recreational activities.In reality,the traditional way of manual counting is bound to be eliminated because of artificial factors(e.g.,subjectivity,emotions,etc.)have led to disadvantages such as poor counting accuracy,weak real-time performance,and invisibility.This is a waste of labor cost,and in the process of reporting on the target,it is easy to cause mismatches,which results in some security risks.With the advancement of science and technology,the traditional way of manual reporting has failed to keep pace with the progress of the training level of relevant personnel.Therefore,various types of target systems based on various principles have developed rapidly under the demands of society.The study of contemporary target shooting systems has been accompanied by a wave of scientific and technological development in the entire society,and there has been a continuous trend of more intellectualized.Compared with other methods of signal reception,the positioning system based on acoustic emission in this paper has the advantages of high precision,low cost,and at the same time,it will not affected by the interference of outside factors such as sunlight,wind speed.The specific work of this paper is as follows:Firstly,this study elaborates the research significance on acoustic emission target positioning system and reviews relevant researches at home and abroad.Compared with other types of target positioning systems,the feasibility of solutions based on acoustic emission technology are analyzed.Secondly,this paper lists the technical theory of the acoustic emission location function.Comparing several commonly used sound source localization technologies,it selects Time difference of arrival location method which has high operability and precision,and explains its principles and practical feasibility accordingly.Thirdly,this study completes the overall and the module design of the system,mainly including signal conditioning module(including amplifying circuit,filter circuit,bias circuit),signal acquisition module(ADC),data transmission and storage module(SDRAM memory,W5300 network controller),the core control module(FPGA)and the power module(DC-DC vacuum chopper power circuit,LDO circuit,voltage reference),this set of dedicated hardware system for target localization based on acoustic emission technology guarantees the system work.Finally,using FIR digital filtering and FFT algorithm and other signal processing methods to analyze the original signal,and verify the feasibility of the solution based on the time delay estimation method and the two-dimensional TDOA location algorithm.