An implemented impedance measuring instrument is described in this paper. The device uses a dsPIC (Digital Signal Peripheral Interface Controller) as a processing unit, and a DDS (Direct Digital Synthesizer) to stimulate the measurement circuit composed by the reference impedance and the unknown impedance. The voltages across the impedances are amplified by programmable gain instrumentation amplifiers and then digitized by analog to digital converters. The impedance is measured by applying a seven-parameter sine-fitting algorithm to estimate the sine signal parameters. The dsPIC communicates through RS-232 or USB with a computer, where the measurement results can be analyzed. The device also has an LCD to display the measurement results.
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The subject of the paper is vibration monitoring and measurements of the remote object in the pneumatic self-regulating clutch. Data from accelerometer sensor is further processed in dsPIC microcontroller targeted in minimalizing the torsional oscillations in mechanical system. Differential pneumatic flexible clutch is applied for reducing the torsional oscillation phenomena during the regular operation. Conclusions are derived and formulated.
PL
Praca dotyczy nowych sposobów dostrajania układów mechanicznych drgających skrętnie za pomocą sprzęgieł pneumatycznych. Ograniczenie rezonansowych drgań skrętnych w układach mechanicznych w oparciu o układ mikroprocesorowy jest przedmiotem przedstawionych badań. Układ zawiera akcelerometr wraz z procesorem 16 bitowym ds. PIC.