| 摘要 |
PURPOSE:To take out a signal for only pressure components, by adjusting the amplitude and phase of an acceleration sensor, which is provided on a body to which semiconductor pressure converters are attached, and cancelling the acceleration components included in the output signals of said converters. CONSTITUTION:To the same vibrating body, n pieces of semiconductor type pressure converters 10-1-10-n are attached at a specified interval. The signals therefrom are amplified by amplifiers 11-1-11-n and supplied to the (+) inputs of differential amplifiers 12-1-12-n. Meanwhile, an acceleration sensor 13 is attached to the same vibrating body, to which the converters 10-1-10-n are attached, and the acceleration of the vibrating body is detected. The amplitude of the output signal of the sensor 13 is adjusted by the volume control in a divider 14. Then the result is distributed and supplied to phase shifters 15-1-15-n, which correspond to the converters 10-1-10-n. In this constitution, required computation is performed in the differential amplifiers 12-1-12-n, and only the pressure components of the converters 10-1-10-n can be taken out. |
