Design Of Electric-field Coupled Power Transfer System For Pipeline Inspection Robot

Underground pipeline has complex internal environment,the presence of a variety of flammable,explosive and corrosive gases makes manual inspection difficult and inefficient.The pipeline inspection robot can work all day,detect and transmit various information in real time,and greatly improve the efficiency of daily inspection.In view of the problem that in the pipeline,there is a flammable gas and it is not possible to use spark-prone sliding wire for power supply,research an Electric-field Coupled Power Transfer(ECPT)system suitable for the pipeline inspection robot.The transfer method is non-contact electric energy transmission realized by electric field,because it can transfer energy through the metal and can avoid the shortcomings of eddy current heating on the metal surface,it has unique advantages in the metal environment.Therefore,the research on the ECPT system of the pipeline inspection robot in this paper is of great significance.This paper first analyze the working principle and main circuit topology of the ECPT system,the two-port network is used to analyze the resonant network with constant current and constant voltage characteristics,and analyze the parameter design method and transmission characteristics of the third-order resonance network.Second research the composition and performance of typical coupling mechanism,and use electromagnetic simulation software to simulate the typical coupling mechanism;according to the application characteristics of the ECPT system of the pipeline inspection robot,a coupling mechanism form suitable for the ECPT system of the pipeline inspection robot is designed.Then according to the resonant network with constant current and constant voltage characteristics,design an ECPT system with constant current output characteristics,and the transmission characteristics of the system are analyzed in detail;then on this basis,an ECPT system with constant voltage output characteristics is designed,and analyzes the parameter design method and transmission characteristics of the system,the simulations verify the constant current and constant voltage output characteristics and transmission characteristics of the above systems.Finally combined with the actual environment,the ECPT system experiment platform of constant current and constant pressure pipeline corridor inspection robot was built,select TMS320F28035 as the main control chip.The correctness of the above system parameter design method and the output characteristics of constant current and constant voltage are verified through experiments.