| 摘要 |
PROBLEM TO BE SOLVED: To keep the practicability and analyze the frequency information based on vibration generated by a fingertip at a high frequency resolution and high time resolution, in a frequency analysis technology.SOLUTION: When a frequency component extraction (Fourier transformation) is executed, a specific frequency belonging to a low frequency is certainly extracted, and simultaneously fine monitoring is performed. In other words, the time width and transition width of a cut window are set independently. In other words, the cut window is set at 0.1 sec and the transition width is set at 0.01 sec. As a result, while transition (time series variation) is performed every transition width, the frequency component in the time width of the cut window is Fourier-transformed, the frequency component of the specific frequency can be certainly extracted, and fine monitoring of a tap operation is allowed. |
