Title:
信号分析装置
Document Type and Number:
Japanese Patent JP4489311
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a device in which the rate of change of frequency/ amplitude of input signals from a single spectrum distribution is obtained and spectra are precisely obtained. SOLUTION: Input signals are A/D converted, a window function is multiplied, a discrete Fourier transformation is executed, the spectrum of the input signals is computed and a necessary number of unit signals are generated from the computational result. Each unit signal is A/D converted and the spectrum is computed by a discrete Fourier transformation. When there exist a plurarity of unit signals, the signals are added together. Then, root mean square errors in the amplitude/phase space of the spectrum of the input signals and the spectrum of the unit signal sum are computed and discrimination is made to determine whether the error is minimum or not. When the error is discriminated to be not a minimum, the parameters of each unit signal are changed to make the error minimum. If necessary, a new unit signal is generated and the above processes are repeated.
Inventors:
Hitoshi Ito
Koji Tsujino
Koji Tsujino
Application Number:
JP2001016055A
Publication Date:
June 23, 2010
Filing Date:
January 24, 2001
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
G01R23/16; G10L25/00; G10L25/15; G10L25/18; G10L25/27; G10L25/48
Domestic Patent References:
| JP2226300A |
Attorney, Agent or Firm:
Next student Okada
Yukari Hirano
Yukari Hirano