Design and Development of Magnetostrictive Actuators and Sensors for Structural Health Monitoring

Sensors

卷:20

Zhaoyuan Leong¹  Michelle Rodrigues¹  JaminDaniel Selvakumar Vincent¹  NicolaA. Morley¹ 

[1] Department of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, UK;

关键词: structural health monitoring;    composites;    magnetostrictive actuator;    sensors;    data acquisition system;   

DOI  :  10.3390/s20030711

来源: DOAJ

【 摘 要 】

Carbon Fibre Reinforced Polymer composite (CFRP) is widely used in the aerospace industry, but is prone to delamination, which is a major causes of failure. Structural Health Monitoring (SHM) systems need to be developed to determine the damage occurring within it. Our motivation is to design cost-effective new sensors and a data acquisition system for magnetostrictive structural health monitoring of aerospace composites using a simple RLC circuit. The developed system is tested on magnetostrictive FeSiB and CoSiB actuator ribbons using a bending rig. Our results show detectable sensitivity of inductors as low as 0.6 μH for a bending rig radii between 600 to 300 mm (equivalent to 0.8 to 1.7 mStrain), which show a strain sensitivity resolution of 0.01 μStrain (surface area: ~36 mm²). This value is at the detectability limit of our fabricated system. The best resolution (1.86 μStrain) was obtained from a 70-turn copper (~64 μH) wire inductor (surface area: ~400 mm²) that was paired with a FeSiB actuator.

【 授权许可】

Unknown