Development of novel symmetrical electrode metal-core piezoelectric fibers for an application as airflow sensors

被引:2
作者
Bian, Yixiang [1 ]
Huang, Huiyu [1 ]
Can, He [1 ]
Dai, Longchao [1 ]
Hong, Jin [1 ]
Hui, Shen [2 ]
机构
[1] Yangzhou Univ, Coll Mech Engn, Yangzhou 225127, Jiangsu, Peoples R China
[2] Qingdao Univ, Coll Mech & Elect Engn, Qingdao 266071, Shandong, Peoples R China
基金
中国国家自然科学基金;
关键词
Bio-inspired; piezoelectric fiber; airflow sensor; directional response; metal core; EQUATIONS; DESIGN;
D O I
10.3233/JAE-160081
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
Crickets and many other orthopteran insects can detect an impinging airflow using mechanosensory hairs located on their cerci. Inspired by these filiform mechanosensory hairs, a new symmetrical electrodes metal-core piezoelectric fiber (SMPF) was designed and fabricated as a building block for future airflow sensors. This novel type of airflow sensor was produced utilizing the extrusion method and high-temperature sintering. A metal core was basically located at the center of the fiber and surrounded by a hollow cylinder of ceramic material. Two thin metal films were spray-coated symmetrically on the surface of the fiber on opposite sides. After successful polarization, the two surface metal layers could be used as sensor electrodes. This way, a cantilevered SMPF was able to detect the strength and direction of an impinging airflow. A theoretical model of the SMPF airflow sensor was established and validated by the experimental results. The results further showed that the electric charge generated on the electrodes of a cantilevered SMPF grows exponentially with the airflow strength, and that it is proportional to the cosine of the airflow direction.
引用
收藏
页码:523 / 535
页数:13
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