Accelerometer is the most commonly used sensor
for vibration measurement. It converts the vibration unit (displacement,
velocity, acceleration) into a value (voltage, current) proportional to
acceleration and outputs it, so it is also called ‘Acceleration pick up’ or
‘Transducer’. When purchasing a new acceleration sensor, you receive data on
the calibrated sensitivity from the manufacturer and input the data into the
measuring instrument (FFT, Machine analyzer) to measure it. The standard
sensitivity is 10mV/g, 20, 100, 200, 1000, etc., and the calibrated sensitivity
is indicated as 0.97mV/g, 19.8, 99,197, 998.5, etc. Even if it does not
significantly violate the error of general measurement, calibration is
absolutely necessary for precise measurement.
Accelometer calibration
There
are many reasons for errors in measurement r............................
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.’
