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NiFe/Ta(t)/NiFe 박막을 이용한 평면홀 바이오센서로서 고감도 특성 연구
이상석(Sang-Suk Lee) 한국자기학회 2020 韓國磁氣學會誌 Vol.30 No.5
As a device that measures a fine magnetic field to be used as a biosensor, a simple multilayered cross-shaped current and voltage terminals are formed. The sensitivity of planar Hall voltage sensitivity (SPHV) were obtained from the planar Hall voltage (PHV) curve, which was measured by applying an external magnetic field perpendicular to the magnetization easy axis. The PHV curve for the NiFe(6 nm)/Ta(20 nm)/NiFe(6 nm) multilayer changed linearly in the region of ±0.9 Oe, and the SPHV was 500 µV/Oe. In particular, as the increased sensing current from 1.0 mA to 40 mA, the SPHV was from 2.0 mV/Oe to 398 µV/Oe. These results suggested the possibility of developing a PHR biosensor with high sensitivity even with a multilayer structure formed of a bottom Ta layer and a ferromagnetic NiFe layer.
김민진(Minjin Kim),이창원(Changwon Lee),고상경(Sankyung Koh) 한국자동차공학회 2020 한국자동차공학회 부문종합 학술대회 Vol.2020 No.7
Anti-pinch means a function that protects passenger from injury when a moving object gets stuck. Recently the power seat adopts the memory function to improve convenience and seat is designed for passenger safety as top priority. Therefore seat system needs anti-finch technology as an essential part of safety. For anti-pinch detection, it senses the seat motor current. The motor torque and current increases proportionally if getting stuck during seat movement. In order to find the threshold, multiple moving average method is applied to the current value. In this paper a practical pinch torque detector based on a multiple moving average is proposed for low-cost anti-pinch seat control system.