Development of Optic-Electric Hybrid Sensors for the Real-Time Intelligent Monitoring of Subway Tunnels

Table 2

Measured spatial coordinates.

Nos.	Initial; 2019.11	Results; 2019.12	Nos.	Initial; 2019.11	Results; 2019.12
1#	(0,0)	(0,0)	2#	(4.855,-0.043)	(4.853,-0.042)
3#	(9.921,-0.086)	(9.920, -0.087)	4#	(14.663,-0.232)	(14.657,-0.230)
5#	(9.921,-0.086)	(9.920, -0.087)	6#	(24.959,-0.378)	(24.956,-0.378)
7#	(20.128,-0.378)	(20.123,-0.382)	Mark 1	(4.855,1.964)	(4.853,1.963)
9#	(20.128,-0.378)	(20.123,-0.382)	Mark 2	(14.663,1.833)	(14.657,1.830)
—	—	—	Mark 3	(24.959,1.576)	(24.956,1.573)