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

Table 3

Calculation result of different angles when the distance from sensor to casing is 1 m.

Angle (°)	Theory angle (°)	Peak (nT)	Peak angle (°)	Valley (nT)	Valley angle (°)	Calculation distance (m)	Calculation angle (°)	Distance error (%)	Angle error (°)
10	95	1292.1	97.3	−1033.4	271.2	0.92	97.5	8	2.5
20	95	1000.5	103.5	−1102	262	1.062	102.7	6.2	7.7
30	95	1025.2	103.7	−988.2	268.4	1.048	103.5	4.8	8.5
40	95	1005.4	104.8	−1010.2	270.5	0.958	103.2	4.2	8.2
50	95	998	104.2	−792.2	268.4	0.931	104.3	6.9	9.3
60	95	805.4	92.8	−810.1	273.9	0.822	92.9	17.8	2.1
70	95	538.2	110.4	−508.4	270.5	0.795	109.8	20.5	14.8
80	95	263.4	112.5	−336.2	281.3	0.788	110.2	21.2	15.2
90	95	383.5	134.2	−321.3	287.8	0.811	108.2	18.9	13.9