Manufacture of Piezoelectric Sensor Dedicated to Airflow Velocity Detection
نویسندگان
چکیده
This paper researches the dedicated piezoelectric sensor for airflow information sensitivity which uses PZT-5A piezoelectric material and rigid polyurethane foam to act as its matching materials. It adopts multiplex mode to realize the broadband design of sensor and does finite element simulation to establish admittance grid, sound field distribution diagram and model in which cylinder is added with matching layer. Finally dedicated piezoelectric sensor is manufactured through technical study. It keeps the features of center frequency 230 kHz, resonance point sound pressure level 90 dB, resonance point -3 dB and beam width 7.6°in which doublet coupling helps form wider working band. Copyright © 2013 IFSA.
منابع مشابه
Flow-Induced Energy Harvesting: Conceptual Design and Numerical Analyses of a Piezoelectric Bender for Smart Building Applications
This study focuses on the conceptual design and the numerical analysis of an Energy Harvesting (EH) device, based on piezoelectric materials, for the sustainability of smart buildings. Before that, a comprehensive literature review on the topic takes place. The device consists in an aerodynamic fin attached to a piezoelectric element that makes use of the airflow to harvest energy. The principa...
متن کاملPiezoelectric sensing: Evaluation for clinical investigation of deviated nasal septum
Noninvasive objective evaluation of nasal airflow is one of the important clinical aspects. The developed polyvinylidene fluoride (PVDF) sensor enables measurement of airflow through each side of the nose using its piezoelectric property. This study was designed to evaluate the diagnostic capability of the PVDF sensor in assessing the deviated nasal septum (DNS). PVDF nasal sensor uses its piez...
متن کاملA Smart Flow Sensor for Flow Direction Measurement
The purpose of this paper is to apply MEMS techniques to manufacture a gas flow sensor that consists with an airflow rate and airflow direction sensing units for detection of airflow states. This study uses a silicon wafer as a substrate which is deposited silicon nitride layers. To form the airflow rate sensing unit, a micro heater and a sensing resistor are manufactured over a membrane that r...
متن کاملSpatial detection of ferromagnetic wires using GMR sensor and based on shape induced anisotropy
The purpose of this paper is to introduce a new technique for row spacing measurement in a wire array using giant magnetoresistive (GMR) sensor. The self-rectifying property of the GMR-based probes leads to accurately detection of the magnetic field fluctuations caused by surface-breaking cracks in conductive materials, shape-induced magnetic anisotropy, etc. The ability to manufacture probes h...
متن کاملModeling and analysis of a three-component piezoelectric force sensor
This paper presents a mathematical model for the vibration analysis of a three-component piezoelectric force sensor. The cubic theory of weakly nonlinear electroelasticity is applied to the model for describing the electromechanical coupling effect in the piezoelectric sensing elements which operate in thickness-shear and thickness-stretch vibration modes. Hamilton's principle is used to derive...
متن کامل