1. Zhang, X.: Digital voice processing and MATLAB simulation. Electronic Industry Press, Beijing (2010)
2. Sun, F.: Design and commissioning of pantograph strip wear detection system. Southwest Jiao Tong University, Chengdu (2011)
3. Minom, O., Yu, H., Lin, K.: Development status of railway vehicle roadside monitoring system. Foreign Veh. Technol. 05, 1–3, 14 (2000)
4. Sun, F., Wang, B.: Ultrasonic testing method for pantograph wear of double strips. Development and innovation of electromechanical products 24(03), 129–131 (2011)
5. Chen, K.: Development and implementation of wireless video surveillance system for locomotive pantograph. Southwest Jiao Tong University, Chengdu (2009)