Even if there are measuring instruments and
vibration sensors, if you want to measure the vibration of a target structure
or facility (machine), where and in what direction should you attach the sensor
and acquire data? It can be overwhelming. In fact, there must be prior
knowledge with a lot of theoretical and empirical basis. Selection and setting
of measuring instruments and sensors are important, but data that is not measured
in the right location becomes the basis for error diagnosis. To summarize, the
answer would be ‘a point where the highest vibration state
(position, direction, behavior) can be read well, so evaluation is possible and
it is safe.’
In order
to effectively measure vibration and perform predictive maintenance, it is
necessary to find and set the correct measurement point and store the measured
data continuously. A defect in equipment is usually found at the point where
vibration shows the highest amplitude, and this may have directionality or may
be a point that directly expresses the cause. It is a diagnosis. However, the first starting point for this diagnosis is to name the
measurement point, and we will check the internationally common naming
method.
Measurement point selection rules
If data measurement points are marked on
equipment, data are collected from the same location, so trend data has
reliability first. The measuring points should be the
same as those called on the instrument (route) or on the recording paper
(computer file). For example, if the ‘horizontal direction of the motor
half-load side’ was measured and saved by the measuring instrument, there would
be a way to easily recognize this point and express it simply.
