Design And Key Techniques Of Automatic Test System For Geometric Parameters Of Roller

Textile machinery is the basis for the production of textile industry,its machining precision has a direct effect on the overall level of textile technology.Roller is an important component in textile machinery's drafting mechanism,in order to ensure the quality of the products,the geometric standards of roller in production and processing must be met.At present,detection methods of roller have problems such as low efficiency and large error.Therefore,a set of accurate and efficient automatic detection system is urgently needed.In this paper,a set of automatic testing system of roller geometry is designed,and the research work is carried out around the system and its key technologies.The main work of this paper is as follows:1.The difficulty of measuring geometric parameters of the roller was analyzed,the overall plan of automatic detecting was designed.A method of detecting the R angle of the roller base by shadow casting and a method of measuring the total length of the roller using the laser range sensor are proposed.2.The data processing methods of key geometrical features such as image filtering,image segmentation,edge extraction and feature fitting of roller column profile are studied,and the automatic identification,extraction and dimension calculation of the target are realized.3.Independently designed laser range sensor,the optical parameters of the sensor is optimized and the appropriate subdivision algorithm of laser spot is selected.In order to enhance the range accuracy and the adaptability to smooth surface of laser triangulation sensor,a parameter optimization scheme of sensor structure is proposed by analyzing the imaging system.The analyses include the impact of working angle on diffuse light acquisition,and the relationship between optical resolution and lateral magnification at the reference point of imaging system.Based on the roller automatic test system,the subject set up an experimental platform and carried out a lot of experiments.The feasibility of the automatic testing of roller was verified by experimenting with the measurement accuracy and repeatability accuracy of visual inspection and laser triangulation.