Abstract
This paper presents a new system model for diagnosis of structures and facilities based on sounds. In this model, sounds of machines in operation or tapping by a test hammer are recorded as digital data by a PDA or a note-PC and stored in databases in regional administrative offices. Upon request, an inspector or an engineer at a site can retrieve various sound data from the databases via the Web Service by querying. A prototype system was developed. Then, submersible pumps, which are used at inspection galleries of dams, underground power stations, etc., were selected as a target for the verification of verification of the model. We executed experiments by intentionally pasting obstacles between blades of a pump and removing parts of blades and recorded and analyzed the sounds in operation. We found that the deterioration of pumps make differences in spectra of sounds by the spectral analysis. The results showed that the proposed system model could be used for diagnosis of pumps when parts of blades collapsed.
