Wireless Sensor Networks of Infrastructure Health Monitoring for High-Speed Railway

Table 1

Common types of sensors used in IHM-WSNs.

Sensor type	Application purpose or monitoring strategy
Photoelectric switch	Monitoring of overhead line system
Electrical sensor	Safety monitoring of power supply system
Optical grating transducer	Monitoring of rapid slope
Water sensor	Monitoring of track settlement deform
Strain transducer	Monitoring of track longitudinal stress
Pressure sensor	Monitoring of track composite stiffness
Humidity sensor	Safety monitoring of power supply system
Temperature sensor	Monitoring of track longitudinal stress
Displacement sensor	Monitoring of track displacement and crawling