A linear non-contact displacement sensor based on electromagnetic induction

which is used in intelligent valve position control system is designed. This design has the advantages of simple structure

low cost and not suffering the effect of oil pollution

dust and other environmental conditions in the pipeline. Through the design of the sensor head

each part of the circuit design and related experiments

finally realize measurement error within-0. 06

0. 04 mm while measurement range of 0

50 mm

which can well meet the requirements of valve opening control

implement cost-effective at the same time and has a strong applicability in practical engineering.