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Sensors and Materials, Volume 36, Number 6(2) (2024)
Copyright(C) MYU K.K.
pp. 2337-2349
S&M3672 Research Paper of Special Issue
Published: June 18, 2024

Development of Noncontact Microdistance-measurement Devices Based on Giant Magnetoresistance Sensors [PDF]

Hung-Yih Tsai, Ming-Chi Chiou, and Ben-Fong Yu

(Received January 3, 2024; Accepted May 30, 2024)

Keywords: processing accuracy, noncontact microdistance sensor, GMR sensor, tool slider

Processing machines require various sensors for process monitoring and control to improve processing accuracy. Sensors become a critical factor in both automated production and intelligent manufacturing. It is interesting that the accuracy of the microdistance-measurement device affects the fine-tuning quality of cutting tools. In this work, we developed a noncontact microdistance sensor based on the giant magnetoresistance (GMR) effect by combining a neodymium magnet with a tool slider. The slider is displaceable along the axis of rotation adjustment. Thus, the distance between a neodymium magnet and GMR is altered when the rotary adjuster moves the tool slider. The corresponding voltage output can be measured under a changing magnetic field. The experimental results show that the measurement sensitivity can reach 4.68 mV/μm and that the linear output is approximately 2.54 V at the full-scale range. The significant advantage of being less prone to wear and not dampening the motion of a target of noncontact sensors leads to important applications in several areas of engineering and shows the potential for further improvement to provide a suitable structure for practical applications.

Corresponding author: Ben-Fong Yu

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Cite this article
Hung-Yih Tsai, Ming-Chi Chiou, and Ben-Fong Yu, Development of Noncontact Microdistance-measurement Devices Based on Giant Magnetoresistance Sensors, Sens. Mater., Vol. 36, No. 6, 2024, p. 2337-2349.

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