| 摘要 |
PURPOSE:To measure an acceleration signal with an optical system of simple structure as well as correct the outputted acceleration signal so as not to be changed by the temperature change in the environment where a measuring apparatus is placed, the fluctuation of supply voltage or the fluctuation of light source caused by degradation or the like in an optical acceleration measuring device formed in such a way as to process an optical signal from an acceleration sensor with an electronic circuit. CONSTITUTION:Light emitted from light source 1 at the sufficiently higher frequency pulse than the maximum value of oscillation frequency detectable with an acceleration sensor 10 is case at the acceleration sensor 10 to obtain light with acceleration information. After converting the reflected light from the acceleration sensor 10 into an electric signal in a light receiving element 6, the oscillation frequency element obtained in the acceleration sensor 10 is taken out by a low-pass filter circuit 16, then the pulse frequency element of the light source 1 is taken out by a high-pass filter circuit 14, and the effective value is obtained in an effective value detecting circuit 15. The ratio of two signals is obtained by a divider 17 to obtain a corrected acceleration signal. |
