Precise and robust hall effect gap sensor with common electrical and magnetic noise reduction technique

Precise Hall effect gap sensor with differential and shielding structure for effective reduction of common electrical and magnetic noise is reported. Applied to a transport system with magnetic levitation, resolution of the sensor resulted in 2 μm while with 2 mV/μm sensitivity at main sensing range...

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Bibliographic Details
Published in2017 International Conference on Electron Devices and Solid-State Circuits (EDSSC) pp. 1 - 2
Main Authors Sang-Hui Park, Sang-Han Lee, Se-Hong Park, Yeong-Hoon Sohn, Yeunhee Huh, Gyu-Hyeong Cho, Chun-Taek Rim
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2017
Subjects
differential structure
display transport system
gap sensor
Hall effect
Magnetic circuits
Magnetic levitation
Magnetic noise
Magnetic shielding
Regulators
Sensors
shielding structure
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Summary:Precise Hall effect gap sensor with differential and shielding structure for effective reduction of common electrical and magnetic noise is reported. Applied to a transport system with magnetic levitation, resolution of the sensor resulted in 2 μm while with 2 mV/μm sensitivity at main sensing range of 1.5mm. Less than 1 μm variation is observed despite the ambient magnetic field. Levitation error of the transport system with the gap sensor satisfied a given specification of less than 10 μm.
DOI:10.1109/EDSSC.2017.8126428