Bio-inspired Flexible Airflow Sensor with Self-bended 3D Hair-like Configurations

2021 ◽  
Author(s):  
Dawei Shen ◽  
Yonggang Jiang ◽  
Zhiqiang Ma ◽  
Peng Zhao ◽  
Zheng Gong ◽  
...  
Keyword(s):  
Airflow Sensor

A biomimetic 3D airflow sensor made of an array of two piezoelectric metal-core fibers

Sensor Review ◽  
2017 ◽  
Vol 37 (3) ◽  
pp. 312-321 ◽  
Author(s):  
Yixiang Bian ◽  
Can He ◽  
Kaixuan Sun ◽  
Longchao Dai ◽  
Hui Shen ◽  
...  
Keyword(s):  
Design Methodology ◽  
Spherical Surface ◽  
Three Dimensional ◽  
Three Dimensions ◽  
Piezoceramic Cylinder ◽  
Metal Core ◽  
Content Type ◽  
3D Space ◽  
Highly Sensitive ◽  
Airflow Sensor

Purpose The purpose of this paper is to design and fabricate a three-dimensional (3D) bionic airflow sensing array made of two multi-electrode piezoelectric metal-core fibers (MPMFs), inspired by the structure of a cricket’s highly sensitive airflow receptor (consisting of two cerci). Design/methodology/approach A metal core was positioned at the center of an MPMF and surrounded by a hollow piezoceramic cylinder. Four thin metal films were spray-coated symmetrically on the surface of the fiber that could be used as two pairs of sensor electrodes. Findings In 3D space, four output signals of the two MPMFs arrays can form three “8”-shaped spheres. Similarly, the sensing signals for the same airflow are located on a spherical surface. Originality/value Two MPMF arrays are sufficient to detect the speed and direction of airflow in all three dimensions.

scholarly journals Seabird Biologging System with Compact Waterproof Airflow Sensor

2021 ◽  
Vol 33 (3) ◽  
pp. 466-474
Author(s):  
Hidetoshi Takahashi ◽  
Masaru Naruoka ◽  
Yoshinobu Inada ◽  
Katsufumi Sato ◽  
◽  
...  
Keyword(s):  
Dorsal Surface ◽  
Micro Electro Mechanical System ◽  
Pitot Tube ◽  
Flight Performance ◽  
Airflow Velocity ◽  
Mems Sensor ◽  
System A ◽  
Tube Type ◽  
Direct Measurement Method ◽  
Airflow Sensor

This paper presents a seabird biologging system with a compact waterproof airflow sensor. Although biologging methods have attracted attention in the evaluation of seabird flight performance, a direct measurement method of airflow velocity has not yet been established. When an airflow sensor is added to a biologging system, a more accurate assessment of the flight performance can be obtained. We developed a compact Pitot tube-type airflow sensor that is specialized for seabird biologging systems. Here, we integrated micro electro mechanical system (MEMS) sensor chips and a sensing circuit into the Pitot tube housing. Then, we conducted a wind tunnel experiment using a stuffed seabird and the fabricated sensor. The results confirmed that the sensor responds to the wind speed even when attached to the dorsal surface of the seabird. Based on the above, we believe that the proposed sensor can be applied to practical seabird biologging systems.

scholarly journals Optimization of Velocity Flap Structures in High Sensitivity Macrofluidic Airflow Sensor

2018 ◽  
Vol 7 (4.27) ◽  
pp. 11
Author(s):  
Mohamad Dzulhelmy bin Amari ◽  
Muhamad Saifuddin b. Abdull Shukor ◽  
Sukarnur Che Abdullah
Keyword(s):  
High Sensitivity ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Velocity Impact ◽  
Fast Detection ◽  
Intelligent Control System ◽  
Highly Sensitive ◽  
Computational Fluid Dynamics Cfd ◽  
Airflow Sensor ◽  
Program Software

Automated reaction from the system is most important in fulfilling the requirement of the intelligent control system. Hence, many related studies regarding in developing the hardware of the system such as high sensitivity of the airflow sensor in detecting the changes either in user or the environment. The effect of the fast detection of the sensor through the high sensitivity of the airflow sensor have enable the system to identify and analyze the behavior of the user in higher accuracy compared to conventional system. Within the scope of airflow sensitivity, separation between two parts in the airflow sensor in altering the velocity impact have been inquired in purpose, while a few investigations in relations to determine the pressure contour of the main parts have been explored by application of using Computational Fluid Dynamics (CFD. This simulation is performed in the ANSYS program software. Thus, this study consequently intends to be focus on detection the high sensitivity of the airflow movement by distinguishing the high and low velocity impact. The optimization the airflow sensor in this study based on design parameter also done in order to design and develop a highly sensitive airflow sensor   

An airflow sensor array based on polyvinylidene fluoride cantilevers for synchronously measuring airflow direction and velocity

2019 ◽  
Vol 67 ◽  
pp. 166-175 ◽  
Author(s):  
Jie Hu ◽  
Hanmin Peng ◽  
Ting Mao ◽  
Tingyu Liu ◽  
Mingsen Guo ◽  
...  
Keyword(s):  
Polyvinylidene Fluoride ◽  
Sensor Array ◽  
Airflow Sensor

Fabrication of a polyvinylidene difluoride fiber with a metal core and its application as directional air flow sensor

2016 ◽  
Vol 09 (01) ◽  
pp. 1650001 ◽  
Author(s):  
Yixiang Bian ◽  
Rongrong Liu ◽  
Shen Hui
Keyword(s):  
Air Flow ◽  
Hot Extrusion ◽  
Metal Core ◽  
Beam Structure ◽  
Airflow Velocity ◽  
Polyvinylidene Difluoride ◽  
Surface Electrodes ◽  
Flow Changes ◽  
Airflow Sensor ◽  
Piezoelectric Fiber

We fabricated a sensitive air flow detector that mimic the sensing mechanism found at the tail of some insects. [see Y. Yang, A. Klein, H. Bleckmann and C. Liu, Appl. Phys. Lett. 99(2) (2011); J. J. Heys, T. Gedeon, B. C. Knott and Y. Kim, J. Biomech. 41(5), 977 (2008); J. Tao and X. Yu, Smart Mat. Struct. 21(11) (2012)]. Our bionic airflow sensor uses a polyvinylidene difluoride (PVDF) microfiber with a molybdenum core which we produced with the hot extrusion tensile method. The surface of the fiber is partially coated with conductive silver adhesive that serve as surface electrodes. A third electrode, the metal core is used to polarize polyvinylidene difluoride (PVDF) under the surface electrodes. The cantilever beam structure of the prepared symmetric electrodes of metal core piezoelectric fiber (SMPF) is used as the artificial hair airflow sensor. The surface electrodes are used to measure output voltage. Our theoretical and experimental results show that the SMPF responds fast to air flow changes, the output charge has an exponential correlation with airflow velocity and a cosine relation with the direction of airflow. Our bionic airflow sensor with directional sensing ability can also measure air flow amplitude. [see H. Droogendijk, R. G. P. Sanders and G. J. M. Krijnen, New J. Phys. 15 (2013)]. By using two surface electrodes, our sensing circuit further improves sensitivity.

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