Health Monitoring System with Hybrid Laser Sensor Networks and Cloud Computing for Subway Tunnels

Table 2

Initial angle and coordinates of the infrared laser rangefinder.

Infrared laser rangefinder	Angle		Coordinate (m)
	α	β
No. 1	44	—	(−1.16, 0, 0.19）
No. 3	45	—	(1.04, 0, 0.16)
No. 5	27	20	(−0.64, 069, 0.13)
No. 7	27	20	(0.56, 0.68, 0.12)