| 摘要 |
The invention starts from a bearing monitoring apparatus (10) including at least one interface (12) for receiving strain signals detected by at least one strain sensor (14) mounted on a bearing (18) and at least one data processing unit (20) configured to monitor the bearing (18) by detecting bearing defects based on the strain signals, wherein the data processing unit (20) is configured to subject the strain signal to a high pass filtering, wherein a limit frequency of the high pass filter is set higher than a typical ball pass frequency of the bearing (18) to be monitored, to calculate a quantity representative of the amplitude of the envelope signal of the high-pass filtered strain signal, to compare the peak hold of the envelope signal with an envelope threshold value, to classify the bearing (18) using the result of the envelope comparison and to issue at least one warning signal if the bearing (18) is classified as defective. It is proposed that the data processing unit (20) is further configured to determine at least one fluctuation signal representative for the fluctuation width of the high-pass filtered strain signal, to compare the fluctuation signal with a fluctuation threshold value, and to use the result of the fluctuation comparison in said classification of the bearing (18). |
