Development of a Space-charge-sensing System
Abstract
:1. Introduction
2. Theoretical Background
3. Experimental Set-up
4. Results
4.1 Results obtained in laboratory experiments
4.2 Results obtained in field experiments
5. Concluding Remarks
Acknowledgments
Appendix A Equations relating sound wave to electric field
- P = the entire pressure (Pa)
- P0 = the atmospheric pressure in steady state (1.013×105 Pa)
- A = amplitude of sound pressure (Pa)
- γ = the ratio of specific heat at constant pressure to constant volume (1.402)
- α = the attenuation constant
- ω = the angular frequency of the sound wave
- K = the wave number
- r = the propagation distance of the sound wave (m)
- c = the speed of sound (331.5 m s-1)
- f = the frequency of the sound wave (Hz)
- λ = wavelength (m)
- ρ = the air density (kg m-3)
- ρ0 = the air density in steady state (1.293 kg m-3)
- ρe = space charge density (C m-3)
- ρe0 = space charge density in steady state (1 nC m-3)
- A = amplitude of sound pressure (Pa)
- W = the sound power (Watt)
- S = area (m2)
- I = the sound intensity (Watt m-2)
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Frequency band | 150 – 6000 Hz |
Beam width | 16° |
Input power | 900 W |
Drive impedance | 4Ω |
Height | 2.1 m |
© 2007 by MDPI ( http://www.mdpi.org). Reproduction is permitted for noncommercial purposes.
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Hazmi, A.; Takagi, N.; Wang, D.; Watanabe, T. Development of a Space-charge-sensing System. Sensors 2007, 7, 3058-3070. https://doi.org/10.3390/s7123058
Hazmi A, Takagi N, Wang D, Watanabe T. Development of a Space-charge-sensing System. Sensors. 2007; 7(12):3058-3070. https://doi.org/10.3390/s7123058
Chicago/Turabian StyleHazmi, Ariadi, Nobuyuki Takagi, Daohong Wang, and Teiji Watanabe. 2007. "Development of a Space-charge-sensing System" Sensors 7, no. 12: 3058-3070. https://doi.org/10.3390/s7123058