ACOUSTIC ANALYSATION OF AN OPERATIONAL STATE OF PROCESS MACHINERY

摘要

The invention relates to a method, comprising recording acoustic data of an environment (200) of a process machinery (201 -206) by a first sound acquisition unit (210-220) comprising a first acoustic sensor, transmitting recorded acoustic data to a data processing device (250), forming a first audio profile for recorded acoustic data by determining an acoustic spectrum for acoustic data received from the first acoustic sensor (210-220) and comparing it to pre-stored operational state audio in the memory of the data processing device (250). If the first audio profile corresponds to an audio profile of a malfunction operational state, the method further comprises locating the malfunction of the process machinery (201 -206) on the basis of a location of the first sound acquisition unit (210-220), determining at least one image sensor (230-238) at the location of the malfunction and transmitting a trigger signal by the data processing device (250) for triggering said at least one image sensor (230-238) for capturing one or more images and for transmitting the captured image data to said data processing device (250) for further analysis. The invention further relates to an operational state monitoring system and a computer program product performing the method.