研究目的
Investigating the influence of the backing material on the sensitivity of a PVDF pyroelectric sensor used in acoustic measurement.
研究成果
The backing material's constant pressure heat capacity, attenuation coefficient, and acoustic impedance directly affect the sensitivity of the PVDF pyroelectric sensor. The established Physical model can provide useful suggestions for designing high sensitivity sensors for accurate ultrasound power measurement.
研究不足
The study is based on simulation and theoretical analysis, which may not fully capture all real-world conditions and variations in material properties.
1：Experimental Design and Method Selection:
A Physical model was established in finite element software to predict the waveform of pyroelectric signal.
2：Sample Selection and Data Sources:
The model includes a PVDF pyroelectric sensor with specific dimensions and a focused transducer as an acoustic source.
3：List of Experimental Equipment and Materials:
PVDF film, backing material with varying parameters (constant pressure heat capacity, attenuation coefficient, acoustic impedance).
4：Experimental Procedures and Operational Workflow:
Simulation of acoustic power measurement by changing backing material parameters and analyzing the effect on sensor sensitivity.
5：Data Analysis Methods:
Finite element analysis to calculate the sensor output signal and sensitivity based on temperature rise and pyroelectric effect.
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