VIBRATION DETECTING METHOD AND DEVICE

摘要

A vibration detecting method capable of detecting cracks produced in a building and degradation of a rotating machine from observed waveform with excellent accuracy and stability. A vibration inspection device for detecting degradation of a rotating machine (5) which is an object to be inspected comprises a vibration detector (sensor) (1) installed on a bearing part (6), a measuring unit (2) for digitizing vibration data collected by the vibration detector (sensor) (1), a determining device for determining vibration waveform data output from the measuring unit (2), and a display device for displaying the output from the determining device. At least two thresholds are set in advance, the vibration data on the object is measured for a predetermined time, the time during which the vibration waveform data created by digitizing the collected vibration data is over the threshold is calculated and defined as a threshold excess time, and the degree of abnormality of the object is determined by comparing this value.