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

Table 7

Comparison of PIV monitoring displacement and new monitoring method calculation displacement.

Loading method	Target	Displacement X (mm)		Displacement Z (m)
		New method	PIV	New method	PIV
Loading point 1 50 N	No. 1	3	3	−3	−3
	No. 3	−3	−3	−3	−3
	No. 5	2	3	−1	−2
	No. 7	−3	−3	−2	−3
	Point 1	—	—	−9	−8
Loading point 1 100 N	No. 1	5	6	−5	−5
	No. 3	−5	−6	−5	−5
	No. 5	3	3	−2	−2
	No. 7	−5	−5	−2	−2
	Point 1	—	—	−16	−15
Loading point 2 50 N	No. 1	1	1	−1	−1
	No. 3	−7	−8	−7	−7
	No. 5	1	1	0	1
	No. 7	−6	−6	−3	−3
	Point 1	—	—	−3	−3
Loading point 2 100 N	No. 1	2	2	−2	−2
	No. 3	−11	−10	−11	−11
	No. 5	2	2	−1	−2
	No. 7	−10	−10	−5	−5
	Point 1	—	—	−6	−6
Loading point 3 50 N	No. 1	5	6	−5	−5
	No. 3	−1	−1	−1	−1
	No. 5	6	6	−3	−3
	No. 7	0	−1	0	−1
	Point 1	—	—	−6	−7
Loading point 3 100 N	No. 1	9	10	−9	−9
	No. 3	−2	−2	−2	−2
	No. 5	10	9	−5	−6
	No. 7	−2	−2	−1	−1
	Point 1	—	—	−10	−11