发明名称 FIXED WIDTH TRACKING ANALYZING DEVICE
摘要 PURPOSE:To execute a fixed width tracking analysis with respect to fixed spectrum width, by determining a clock signal of a period for satisfying a prescribed condition based on a forecasting period, etc. of a signal source, sampling the signal, and executing a Fourier calculation. CONSTITUTION:A period forecasting circuit 17 forecasts the following period T0 from a past rotation period signal of a rotation driving source 4, etc. of a signal source, which is outputted by a period signal generating circuit 6. Subsequently, an calculating means 18 calculates a period U1=T0/H, and a constant of H: number of gear teeth ratio, etc., and a constant calailating means 19 calculates a value m0 by which the number which reduces the time window Tw of a Fourier calculation from the product of a higher harmonic order number (m) and the period U1 to be minimum. Subsequently, a value corresponding to a clock period gamma based on the expression is determined by a clock period calculating means 20, and a clock of the period gamma is outputted through a frequency dividing rate setting means 21 and a frequency divider 23. By this clock, a vibration waveform of the driving source 4, which is detected by a pickup 5 is sampled by a Fourier analyzer 7, and even if synchronizing signal frequency is varied, Fourier analysis is executed by fixed spectrum width.
申请公布号 JPS5923224(A) 申请公布日期 1984.02.06
申请号 JP19820133499 申请日期 1982.07.29
申请人 MATSUSHITA DENKI SANGYO KK;TOYOTA JIDOSHA KK 发明人 NOBORI HIROSHI;OKADA MASANORI;FUKAMACHI MITSUO
分类号 G01M99/00;G01H1/00;G01H17/00 主分类号 G01M99/00
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