Development Of Safety Monitoring Device For Catenary Current Based On Infrared Thermal Imager

The catenary is erected along the railway line air to the transmission line of electric locomotive power supply, safe and stable operation of the operating condition will directly affect the driving electric locomotive. Because of the poor contact between the contact wire and the catenary, there will be a sharp increase in temperature, infrared thermal imaging technology can be used to detect the contact wire. The current detection device for static detection, can not achieve real-time dynamic detection of district wide lines, the overall detection efficiency is low,and there is a big security risk to staff.Security risks according to the existing traditional maintenance method, developed a flow security detection device based on infrared thermal imager is proposed to contact. The device receives the infrared image of the contact wire captured by the infrared thermal imager , GPS module is used to collect location information of detection points, and aiming at the problem of inaccurate positioning caused by too fast train speed during GPS dynamic positioning, the Calman filtering algorithm and the system modeling and simulation are studied,the simulation results show that the algorithm can effectively improve the positioning accuracy. Finally the device through 4G wireless communication network will be the scene of infrared image information and location information, upload to the control center server, for scheduling management in data analysis and archiving discover, catenary line hidden, reasonable arrangements for maintenance tasks.The device is based on the high-performance 32 bit ARM processor STM32F103ZFT6 as the control core, combined with infrared thermal imager, RS485 serial port, LCD display module, GPS module and 4G communication module. Through the software algorithm research to achieve the scene image data acquisition and compression, serial communication protocol coding, TCP/IP protocol encapsulation, GPS data and image data binding , and 4G network images and positioning data matching transmission and other functions, and finally through the experiment device test to verify the feasibility of this study, provides a new method and means for the catenary’s current carrying network security detection and automatic management.