1. College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, People’s Republic of China
2. Nondestructive Detection and Monitoring Technology for High Speed Transportation Facilities, Key Laboratory of Ministry of Industry and Information Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, People’s Republic of China
3. Center of Ultra-Precision Optoelectronic Instrument engineering, Harbin Institute of Technology, Harbin 150080, People’s Republic of China
4. Key Lab of Ultra-Precision Intelligent Instrumentation (Harbin Institute of Technology), Ministry of Industry and Information Technology, Harbin 150080, People’s Republic of China