Arrangement and method for detecting a damage of a filter fabric of a disc filter at a disc filter unit using microphones
AssigneeValmet Technologies Oy
InventorsTeemu Antikainen, Mika Karaila, Joona Nikunen
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Abstract
An arrangement is provided for detecting a damage of a filter fabric (8) of a disc filter (1) at a disc filter unit comprising disc filters. The arrangement includes a measurement bar (20) that includes two or more microphones (21), a store (45) including stored sound samples, at least one alarming means and a processing arrangement (43) for analyzing online sound or sound samples captured by the microphones (21). The processing arrangement (43) is connected to the microphones (21), the store (45) and the at least one alarming means. A method is also disclosed for detecting a damage of a filter fabric (8) of a disc filter (1) at a disc filter unit.
Claims10
An arrangement for detecting a damage of a filter fabric (8) of a disc filter (1) at a disc filter unit disc filters, wherein the arrangement comprises a measurement bar (20) that comprises two or more microphones (21), a store (45) including stored sound samples, at least one alarming means and a processing arrangement (43) for analyzing online sound or sound samples captured by the two or more microphones (21), the processing arrangement (43) being connected to the two or more microphones (21), the store (45) and the at least one alarming means.
A method for detecting a damage of a filter fabric (8) of a disc filter (1) at a disc filter unit comprising disc filters, wherein the method is accomplished by an arrangement comprising a measurement bar (20) that comprises two or more microphones (21), a store (45) including stored sound samples, alarming means and a processing arrangement (43) for analyzing online sound or sound samples captured by the two or more microphones (21), the arrangement being connected to the two or more microphones (21), the store (45) and the alarming means, the method comprises:
- listening (61) to the online sound or a sound sample from the disc filters with the two or more microphones (21) located on a side or above the disc filter unit,
- comparing (62) the online sound or the sound sample by using the processing arrangement (43) including the stored sound samples,
- detecting (63) the damage of the filter fabric (8) by finding similarities between the online sound or the sound sample and the stored sound samples that are known to be samples from damaged filters.
Dependencies are inferred from the claim text.