Measurement Technology Of Hitting Parameters Of Flying Targets Based On Dual Line-Scan Cameras

The target parameters of flying target is very important for the flying target and flying attitude,and it is also the main direction for the study of weapon performance.One of the most important parameters of the flying target is the projectile coordinate of the flying target,which is also an important basis for judging the flying target is stable or not.The research on the measurement of flying target hitting parameters can greatly enhance the testing work of weapon performance,meanwhile,it also can largely improve the development of the modern weapon science in our country,Which lays a solid foundation for the development of China’s military force.Therefore,as for the hitting parameters measurement of flying targets,herein,the method of intersecting dual line-scan cameras to measure the targeting parameters of flying targets was systematically introduced,and the mathematical model of targeting coordinates and targeting angle of flying targets was derived by using the basic principles of spatial stereo vision model and ’line intersection’.And then,the station deployment method of dual line-scan cameras measurement system was studied.According to this deployment method,the station deployment method based on dual line-scan cameras measurement system was studied;Then,the calibration method and the processing algorithm of the line-scan camera image based on this method also was discussed,and the GUI-based software platform for this measurement system was written.Finally,in the light of the results of the system calibration parameters and the mathematical calculation model,the hitting parameters of the flight target can be obtained more accurately.The main contents of this paper and the obtained results are as follows.(1)The measurement method of stereo vision based on the composition of dual line-scan cameras was studied,and the stereo vision measurement model in the view of pinhole model was established.The correspondence beween the world coordinates of the target and its pixel coordinates in images was analyzed.Furthermore,the mathematical expressions of the target coordinates of the flying target and the mathematical model of the target angle calculation using the target coordinates also was given.(2)The imaging characteristics of the target under the line-scan camera and the possible causes of the noise in the images was analyzed.The image processing algorithm of the line-scan camera was studied,and finally various algorithms for extracting the center pixel coordinates of the target were compared and verified.(3)Through the derivation of the line-scan camera model,the calibration method of a single line-scan camera was studied.The expressions of the internal and external parameters of the line-scan camera during the calibration process were derived,and finally the system calibration was completed and the measured values were obtained.Herein,the test platform for simulated flight target parameter measurement was built and experimentally verified,so that the flight target landing parameters were obtained and its performance for the test accuracy was analyzed in detail.The analysis of the experimental results shows that the system can not only meet the requirements of the design index,but also improve the shortcomings of the traditional measurement efficiency,single measurement target and inconvenience.Eventually,the results improve the maneuverability and applicability of the system for the measurement of flight target landing parameters.