| Solid rocket engine is the power source of rocket system,and its reliability is directly related to the success or failure of rocket launch.Therefore,the detection of the key interface debonding phenomenon of solid engine will provide an important guarantee for the reliability of solid engine.At present,film reviewers use light-viewing films to evaluate the interface debonding of radiographic film.Manual evaluation methods are inefficient and inefficient.The error is large.In order to solve the above problems,the solid engine interface debonding fault information acquisition system was designed and developed,and the solid engine radiographic film containing the bonding information was digitized to provide data support for subsequent artificial intelligence film review.This paper analyzed the characteristics of solid engine interface debonding defect information,combined with relevant research status at home and abroad,started from the actual project application,using embedded software and hardware design technology,C++programming and image processing and other related knowledge,designed a set of solid The engine interface debonding fault information acquisition system to complete the acquisition of the optical density value information and the digital high-definition imaging of the ray film of the solid engine.The main tasks completed are:1)High-precision measurement of optical density value of ray filmBy analyzing the optical density value measurement method of ray film,based on the principle of gear transmission and conveyor belt transmission,the transmission mechanism of the test system is designed to realize the adjustable uniform speed transmission of ray film;at the same time,the selection of the photosensitive sensor and the circuit design are completed,combined with the darkroom The structure achieved the high-precision measurement of the optical density value;through design the redundant photoelectric gate to ensure the stable operation of the entire system..2)Digital high-definition imaging of radiographic filmBy analyzing the radiographic characteristics of the solid engine interface debonding fault information,according to the actual needs of the project,the conventional automatic exposure algorithm was improved,a large number of exposure tests were carried out,and the automatic exposure parameter table was designed to realize the upper computer software based on the optics of the radiographic film.The density value automatically adjusts the camera parameters and the light intensity of the imaging light source;at the same time,using the fitting method of least square method,the optical density value measurement error fitting formula is obtained,the error correction of the optical density value is completed,and digital high-definition imaging of radiographic films were displayed and storaged.3)System testing and calibrationIn accordance with the requirements of the national standard for the development of ray film digital equipment,combined with the requirements of technical indicators,the system has been tested for high-definition imaging effects,transmission mechanism stability,and overall system stability.The experimental results show that the overall optical density of the system has the smallest resolution,Allowable working range,image resolution,MTF curve test indicators were 0.0175,2.0～4.5,image resolution 40 points/mm,MTF curve horizontal direction test result was 6.4,MTF curve vertical direction test result was 6.2.Thus,the developed system conforms to the national standard DB rating,satisfies the requirements of technical indicators and operates stably,and satisfies the requirements of cooperative enterprises.The interface information failure information collection system has been applied in a research institute and good performence at present... |
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