Experimental Study of Measuring Algorithm Accuracy of the Electromagnetic Distance Measurement Anticollision Tool

Table 4

Calculation result of different angles when the distance from sensor to casing is 2 m.

Angle (°)	Theory angle (°)	Peak (nT)	Peak angle (°)	Valley (nT)	Valley angle (°)	Calculation distance (m)	Calculation angle (°)	Distance error (%)	Angle error (°)
10	92	150.1	98.2	−146.8	268.1	2.151	98.8	7.6	6.8
20	92	120.5	101.4	−142.4	265.7	1.834	101.1	8.3	9.1
30	92	108.9	100.2	−108.7	264.2	1.91	99.5	9	7.5
40	92	101.5	99.6	−105.4	262.7	1.935	97.7	6.5	5.7
50	92	100.1	101.7	−78.9	269.1	1.822	101.2	8.9	9.2
60	92	72.7	85.7	−86.4	264.8	1.954	84.8	4.6	7.2
70	92	52.7	103.5	−50.1	271.3	1.809	102.8	19.1	10.8
80	92	48.9	105.8	−61.1	258.5	2.371	112.5	18.6	20.5
90	92	50.4	112.1	−55.6	281	1.929	111.2	7.1	19.2