Table 2. Sensing coil specifications and measurement values at 1 kHz

Characteristics	Value
Coil length (mm)	150
Number of sections	5
Inner diameter of coil (mm)	8.5
Outer diameter of coil (mm)	12
Diameter of copper wire (mm)	0.127
Total turns number	12,000
Resistance (Ω)	534
Inductance (mH)	96