| In recent years,with the rapid development of society,problems such as energy crisis and environmental pollution have become more and more serious.As the development direction of future automobiles,driverless cars have the advantages of low energy consumption,low noise,and low pollution,and have huge application prospects.In order to occupy the commanding heights of future technology,countries around the world have introduced policies to support the research and development of unmanned vehicles and raised them to the national strategic level.In this context,analyzing the development status of driverless vehicle technology,exploring the development direction and research trends,is of great significance for my country’s scientific research institutions to clarify the focus of R&D investment and realize the rational and optimal allocation of resources.In order to fully demonstrate the development status of driverless car technology,this article uses journal papers,conference papers in the Web of Science database and patent documents in the inco Pat database as data sources,combined with theories of literature metrology and patent analysis,from a macro and medium perspective.Analyze the research trends,research hotspots,science and technology relevance and other aspects of unmanned vehicle technology from three microscopic perspectives.In terms of evaluation of core researchers,overall consideration of citation time lag and publication volume,selection of core researchers using a comprehensive index;in the research hotspot analysis section,frequency statistics of keywords and patent IPC classification numbers are used to explore the development of unmanned vehicles The key research content in the process,and the time matrix block is added,and the knowledge map is used to show the evolution trend of research hotspots;in the high-cited papers and core patent evaluation parts,the cross-citation relationship between the papers is displayed through the chronology of the high-cited literature and select eight indicators such as the number of claims,the number of citations,and the number of citations to construct a core patent evaluation model to identify the core patents of driverless car technology;in the relevance analysis part,calculate scientific relevance by extracting citations and judging citation types Degree and technical relevance.The research results show that the current driverless car technology is in a stage of rapid growth,and various new scientific and technological achievements are constantly emerging.China and the United States have a large number of papers and patents,and they are the main countries for driverless car technology research.Current research hotspots mainly focus on intelligent transportation systems,path planning,vehicle ad hoc networks,deep learning,simulation research,sensor fusion,etc.Finally,in response to the above analysis,recommendations for the development of domestic driverless vehicle technology are proposed as soon as possible to formulate unified standards,strengthen education in related disciplines,strengthen cooperation,and promote the coordinated development of industry,research,and academia. |