| 摘要 |
PURPOSE:To simplify a circuit constitution to reduce cose and also to reduce a trouble rate by providing two pcs. of integrators and an amplitude calculator and phase calculator to input simultaneously the respective output of these each multiplier. CONSTITUTION:A vibration analyzing apparatus calculates a vibration amplitude A by an amplitude calculator 14 from the output of two pcs. of integrators 13a, 13b and calculates a phase difference B by a phase calculator 15, and both of them are outputted. In this case detecting signals of two pcs. of displacement detector 11a, 11b can be regarded as a sinusoidal wave, consinusoidal wave having a phase difference of 90 deg., and are multiplied with a multiplier 12a, 12b by a vibration signal X detected with a vibration detector 2, and a Fourier transformation is performed by passing through the integrator 13a, 13b, then a vibration amplitude A=[XR(W)<2>+X1(W)<2>]<1/2> phase difference B=tan<-1>[X1(W)/ XR (W)] are calculated by the phase calculator 15 and outputted. Consequently a tracking analysis of a rotary body is possible with a simple circuit constitution and the apparatus is reduced its cost. |
