| 摘要 |
A pump monitoring apparatus for monitoring a vacuum pump 2 having an electric motor 5, the monitoring apparatus comprising at least one sensor 12 for measuring a current of the electric motor to generate a time-based signal; and at least one electronic processor 10 configured to transform the time-based signal into a frequency-based signal; and analyse the frequency-based signal to identify a signal pattern representing a pump fault condition. Preferably the signal pattern comprises at least one signal peak occurring at a predefined frequency or in a predefined frequency range in the frequency-based signal. Preferably the signal pattern comprises an amplitude for the at least one signal peak. The signal pattern may be predefined and represent a known pump fault condition, where a fault diagnostic is associated with the predefined signal pattern. By monitoring the frequency-based signal, the monitoring apparatus can identify a pump fault condition. The signal pattern can, for example, correspond to a vibration signature associated with the pump fault condition. |
