Research On Automatic Calculation Of Quantity Of Overhead Contact System Based On Pattern Recognition

As the demand for railway transportation continues to increase,the scale of electrified railway construction has maintained rapid growth.At present,the engineering quantity calculation of railway still adopts manual calculation,and The basic data of the calculation requires to be manually collected by construction technicians from the drawings,which requires a large amount of work and low efficiency.It is an inevitable trend to improve work efficiency by using intelligent technology to explore methods for automatically calculating engineering quantities of railway.In the paper,the overhead contact system,which is one of the four power projects of railway,is used as the object to study the method of automatic calculation of engineering quantities based on pattern recognition.First,DXF file structure is analyzed,and the DXFLib,a kind of open source library,is used to read DXF format drawing files,and the data information of the basic graphics contained in the drawing is extracted.Secondly,by analyzing the content and characteristics of professional drawings of the overhead contact system,the recognition features of the components of the overhead contact system are proposed,which based on the principle of pattern recognition,and the type and quantity of the components of the overhead contact system are distinguished based on the characteristics.Finally,according to the extracted data information of the components of the overhead contact system,the engineering quantity of the overhead contact system is calculated.The thesis also takes the overhead contact of the CM railway system project as an example to conduct an empirical analysis on the automatic calculation of the engineering quantity of the overhead contact system.Through the analysis of the results of the automatically calculation of the engineering quantity of the overhead contact system,the results show that the automatic calculation of the engineering quantity is more accurate and efficient,which can greatly reduce the workload and time for the technicians to calculate the engineering quantity of the overhead contact system,and significantly improve the efficiency of contact network project management...