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Researches on Optical Measurement Orientational Methods of Shooting Range and Application of the Methods

Author: Chen
Tutor: LeiZhiHui
School: National University of Defense Science and Technology
Course: Aeronautical and Astronautical Science and Technology
Keywords: Photoelectric Theodolite Line-Line Intersection Line-Plane Intersection Plane -Plane Intersection Epipolar Constraint Interpretation Error Orientational Error Infrared Radiation Characteristics
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 118
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Abstract


Optical measurement technique is an important component of measurement and control technology in shooting ranges. Photoelectric theodolite is one of the most important optical measuring equipments in shooting ranges, and the ballistic trajectory and pose parameters of the flight object, which are the significant evidences for the assessment of weapon test and the analysis of failure, can be obtained by interpreting the images captured by it. However, due to the defects and limitations of visible and infrared theodolite, the success rate of target trajectory’s measure is low in shooting ranges currently,which costs a lot of manpower, material and financial resources. This dissertation just focused on the practial difficulties of shooting range, proposed a new idea of measuring the ballistic trajectory of the target with visible theodolite and infrared theodolite. Two orientational methods of IR/visible image based on line-plane intersection and epipolar constraint are proposed, which makes the problems of shooting ranges solved successfully, and the rate of success and reliability of interpretation is greatly improved.The main works and contribution of this dissertation are as follows:1. An orientational method of IR/visible image based on line-plane intersection is proposed. The orientational error models produced by getting point warp and getting axes warp are derivated by using mathematical method, and the results are validated by emulation. Emulation results show that the method can meet the requirement of shooting ranges, which can be used in project, and solve the problems of shooting ranges.2. The orientational error model produced by single variable of line-line intersection method is derivated. The dissertation compares orientational accuracy of line-plane intersection method with line-line intersection method by independent univariat analysis. And the analytical conclusion is proved by emulation.3. An orientational method of IR/visible image based on epipolar constraint is proposed. The orientational error produced by interpreting warp is derivated and analysed. The orientational accuracy of this method is calculated by emulation. And then this dissertation compared the orientational accuracy of the two orientational methods based on line-plane intersection and epipolar constraint, and obtained some conclusion.4. An orientational method of IR/visible image based on line-plane intersection and plane-plane intersection is proposed. This method obtained the accurate position of motor exhaust plume by using line-plane intersection method, and avoided the difficult problem of finding homonymy points in two views, which transfered the error from image to space successfully. At last, it corrected the orientational error based on infrared radiation characteristics of target exhaust plume. The emulation results show that the precision of this method is high, and the method solved the problems of accurate orientation by infrared theodolite in shooting ranges.5. Abnormity of certain model missile is analyzed by using line-plane intersection method and fixed parameter analysis method.The application highlights the important role of our method, and reflects the widely application background and a huge research potential of it.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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