Smart hybrid sensor for magnetic field and vibration detection based on PMN-PT/Terfenol-D magnetoelectric composites and suspended magnetic vibrator

被引：11
作者：
Hu, Lizhi [1 ]
Wu, Hanzhou [2 ]
You, Haoran [2 ]
Wang, Yaojin [2 ]
Gao, Anran [1 ]
机构：
[1] East China Normal Univ, Dept Elect, Key Lab Polar Mat & Devices MOE, Shanghai 200241, Peoples R China
[2] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Peoples R China
来源：
SENSORS AND ACTUATORS A-PHYSICAL | 2021年 / 332卷
关键词：
Magnetoelectric effect; Suspended magnetic vibrator; Smart hybrid sensor; Magnetic field and vibration detection; Intelligent traffic; PIEZOELECTRIC SENSOR/ACTUATOR NETWORK;
D O I：
10.1016/j.sna.2021.113100
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A smart hybrid sensor for magnetic field and vibration detection is presented. We propose a novel structure of the hybrid sensor consisting of two longitudinally magnetized and thickness polarized mode (L-T mode) Terfenol-D alloy 0.7Pb(Mg1/3Nb2/3)O-3-0.3PbTiO(3) single crystal (PMN-PT) magnetoelectric laminate composites and a suspended magnetic vibrator which can convert external vibration to internal alternating magnetic field. The hybrid sensor exhibits a giant vibration responsivity of 12 V/g at 400 Hz and a useful magnetic field responsivity of 6 mV/mu T at 23 Hz. The detection limit for AC acceleration and magnetic field is as low as 8.16 ng/Hz(1/2) at 400 Hz and 16.4 pT/Hz(1/2) at 23 Hz, respectively. The sensor output shows linear response with low distortion both to AC acceleration and magnetic field. In the end, the sensor's capability for detection of magnetic and non-magnetic moving target has been proven to be useful in intelligent transportation by an outdoor (open) test. (C) 2021 Elsevier B.V. All rights reserved.
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页数：9
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