| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2007: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Research Abstract |
In the inverse problem, permittivity distribution image is a nondestructive imaging technique by using measured capacitance. The capacitance was calculated when the position of the acrylic rod is rotated every 30 degrees. The calculated capacitance compares with the experimental value. The gene with the large different value from the experimental value was removed. The next generation gene was generated by crossover and mutation. The permittivity distribution can be found by repeating above process. I found out that it was feasible to estimate the dielectric location, radius and relative permittivity of a dielectric based on genetic algorithm(GA) using finite element method (FEM). I carried out experiments and numerical analyses in order to verify the effect size and position of the arc additional electrode. The width of the measuring electrode is 20mm and the electrodes are located 97mm apart. The additional electrodes are 300mm high. The relative permittivity ε_r of the acrylic rod is 3.11 by the prior experiment. The experimental results with 120 degrees of additional electrode size shows maximum values at 180 degree because the position of dielectric is the closest to the measurement electrode connected ammeter. The measured capacitance increased in case of small size of the low potential arc additional electrode. I conclude that the small size of the arc additional electrode is the suitable for the estimation of the permittivity distribution.
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