Research On Dynamic Pointing Accuracy Testing Technology Of Body Tube

In the development of barrel turning weapons,the accuracy of barrel pointing is one of the important technical indicators to measure the tactical performance of weapons.The dynamic pointing accuracy of the barrel refers to the deviation angle between the actual pointing of the closed barrel and the predetermined firing direction at the firing time of the rotating weapon under normal rotation and non live firing conditions.When adjusting the rotating barrel weapons in the workshop,there is no good testing and measurement method to solve this problem due to the testing being conducted under non live firing and rotating barrel conditions.The central task of this project is to explore a testing and measurement method to solve the problem of testing the pointing accuracy of each barrel of a rotating weapon in a stationary or rotating state when it is calibrated in the workshop.A research and design has been conducted on an automatic testing device that uses laser prism aiming method combined with spot image processing technology to measure the dynamic pointing accuracy of the barrel.The rotating weapon operates at high speed and fires the shell at the moment of closing the chamber.The moment the shell is fired is within a few milliseconds.According to the working principle of the rotary tube weapon,the following technical indicators have been designed:measurement accuracy of 0.1 mil,barrel speed of 1000 r/min,and measurement distance of approximately 100m～200m.Simulate the experiment of testing the dynamic pointing accuracy of the barrel,set the laser pointer as a stroboscopic state for a period of 10 ms to simulate the firing time of the barrel weapon.When the laser pointer lights up,the simulation is regarded as the moment of shell firing at the moment of chamber closing.At this time,the state will generate a pulse signal.The camera will receive the signal and take photos of the spot image generated by the laser shining on the target surface.This design is to ensure the synchronization of the whole test system.Secondly,due to the fact that the collected spot images were captured while the rotating tube was rotating at high speed.Considering that the collected spot images may have blurry and irregular shapes.Image processing technology should be used to process the spot image,and finally,the spot center positioning algorithm based on the least squares ellipse fitting method should be used to obtain the coordinates of the spot center.Through the data results obtained by experiment,the calculation and analysis of the following conclusions are obtained: the dynamic pointing accuracy of the body tube is measured by laser prism and spot image processing,and the error range is less than 3%,and under different measurement conditions.The measurement accuracy of the system can reach less than 0.1mil,which meets the requirements of the system design index and verifies the feasibility of the method,and the experimental results show that the method proposed in this paper successfully solves the problem of measuring the dynamic pointing accuracy of the body tube,and the method can be applied to the measurement of the pointing accuracy of the body tube.