APPLICATION OF VIBRATION SIGNALS TO MONITORING CRUSHING PARAMETERS

Vibration measurements for fine crushing have been performed on a labo ratory scale jaw crusher on dolomite. The original vibration signal wa s sensed by an accelerometer and stored on a DAT recorder during the w hole testing period. The vibration signal was resampled and converted into an IBM PC compatible data format with a digital oscilloscope. The time-domain vibration signal was analysed with the aid of a digital s ignal processing technique. The crushing process can be inspected by r eplaying the sample of the time-domain waveform. The variation of the vibration pattern was described by a few 'latent' variables obtained b y principal component analysis. Relations were established between the crusher setting, the product size and the latent variables by multipl e regression. Measurement of the vibration signal provides a new strat egy for monitoring crushing processes.