点击次数：

论文类型：期刊论文

发表时间：2017-08-15

发表刊物：SENSORS AND ACTUATORS A-PHYSICAL

收录刊物：Scopus、SCIE、EI

卷号：263

页面范围：451-460

ISSN号：0924-4247

关键字：Sleeve eddy current sensor (SECS); Bias magnetic field; Finite element modeling; Sensor optimization; Tension measurement

摘要：According to the inverse magnetostrictive effect, magnetic permeability variations in ferromagnetic materials under elastic stress offer the potential to measure tension. In this study, a prototype sensor was designed, fabricated, and tested. An eddy current sensor (ECS) with a single coil structure was used to detect tension due to its lower cost, simpler structure and less mutual interference than that of conventional elastomagnetic (EM) sensors. In addition, the influence of a sleeve structure on the ECS was investigated through experimental studies. The experimental results indicated that the use of sleeve structure could enhance the relative sensitivity and reduce the repeatability error of the sensor. Furthermore, a bypass structure was designed to adjust the bias magnetic field by changing air gap in the lower magnetic circuit or by rotating yoke in the upper magnetic circuit. The results demonstrated a linear relationship between voltage across the sensor and tension. Finally, the bias magnetic field and working frequency were optimized by monitoring the sensor sensitivity. (C) 2017 Elsevier B.V. All rights reserved.