In order to achieve accurate position measurement for variety of travel and positioning systems

research on the electromagnetic induction system based on electromagnetic induction type position sensor

on the basis of understanding the working principle of electromagnetic induction system

use Biot-Savart law deduced calculate the cosine form of magnetic induction excitation coil in space produced at a certain point formula

The electromagnetic induction sensor model is established by Maxwell Ansoft electromagnetic field finite element analysis software

and the simulation analysis is carried out. Results show that the excitation coil around the size of the magnetic induction intensity into a symmetric distribution

and excitation coil plane at a distance within the range of ± 2 mm greater intensity

meanwhile

the induction coil current change as sine law

and the frequency is equal to the excitation source. According to the analysis result

the distance between the sensor and the excitation coil is suitable for the actual design of the 2 mm.