Research On The Measurement Method Of The Position Of Multi-targets Based On Single-sided Array Camera

In the field of range testing,vertical target density is an important basic performance parameter of weapon system.Accurate measurement of vertical target density and other external ballistic parameters are very important for the damage effectiveness evaluation of weapon system and the development of weapon system.The measurement of vertical target density is based on the measurement of the target position coordinates of multiple projectiles and further calculated by mathematical statistics.Due to the uncertainty and randomness of the spatial dispersion of multi-projectiles,it is often occurred that multiple targets reach a certain plane at the same time,which makes the existing optical testing methods unable to identify and match the position of each spatial target,which brings great difficulties to the dynamic parameter test of multi-target and to measure the performance of guns scientifically,especially in the case of occlusion and coincidence of multiple projectiles.In order to effectively solve the problem of measuring the spatial dispersion of multi-projectiles,a multi-target spatial position combination test method of two-wire laser and area array camera is proposed in this paper.The multi-parameter calculation model of the intersection of two line laser light screens and the imaging optical axis of area array camera is given,and the analytical mathematical model of multi-target spatial position is studied and established.The multi-projectiles target will be occlusive,coincident and arrive at the same first-line laser screen when it passes through the detection area,according to the established model,a recognition model based on the constraint relationship between line laser and area array camera is proposed.The discriminant function of constraint conditions is given,the recognition and matching method based on fuzzy information fusion is studied,the matching mechanism of correlation parameters of data fusion algorithm is analyzed,and the solution method of key parameters is given.According to the measurement principle of the combination of double-wire laser and single-plane array camera the imaging characteristics of multi-target on-line laser screen are analyzed.Based on the principle that linear laser affects multi-target imaging by changing the potential well charge of the camera,the multi-target charge threshold model with different spatial positions is established.According to the imaging charge threshold information of multi-target,the crosstalk probability calculation function under different spatial positions of the target is given,and the influencing factors of multi-target spatial position testing are analyzed according to the crosstalk probability calculation function.The spatial position analysis model and matching recognition method are verified by simulation comparison test.According to the inherent parameters of the constructed testing method,the multi-target image is collected,and the test data under the contrast condition are given.The results show that the constructed test method and the matching algorithm can effectively match the occlusive multi-target and calculate its spatial position,and the test error can meet the measurement requirements.Finally,based on the multi-objective spatial position calculation model,the error analysis of the multi-objective spatial position parameters is carried out by using the differential method,which verifies the feasibility and correctness of the proposed scheme,and has certain theoretical and practical application value.