PIEZOELECTRIC ACCELEROMETER

摘要

FIELD: instrumentation.SUBSTANCE: invention relates to instrumentation and can be used for measurement of acceleration parameters in vibrometry, seismology and acoustics. Claimed device incorporates preamplifier, circular inertial concentrically arranged weights, casing and the first piezo-sensor with axial polarization. Said sensor is composed of two spaced apart piezoelectric sectors and electrodes in contact with side surfaces of said sectors. Note here that circular casing is made of electrically conducting material to contact with aforesaid side surfaces of said sectors that feature different polarization. Note here that said electrodes are connected to preamplifier. Note also that this device includes extra second and third preamplifiers and second circular piezo-sensor. The latter is arranged above the first circular piezo-sensor and is composed of two radially polarized sectors provided with electrodes in contact with side surfaces of said sectors. Said preamplifiers represent a differential design. Sectors of pairs of the second piezo-sensor feature identical polarization. Note that three pairs of the first and second circular piezo-sensors are connected via said electrodes to inputs of appropriate differential amplifiers.EFFECT: measurement of acceleration vector components.2 dwg