Balluff BIS M-408-082-401-07-S4, Руководство по настройке, Страница: 108 / 128

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5.8 Vibration
5.8.1 Description
There are two important vibration values that we should
regularly measure on our machines:
– Total speed in [mm/s], which indicates the general
machine state (lower frequency range)
– Total acceleration in [g], which indicates the bearing
state (higher frequency range)
This secondary device function allows the measurement of
the vibration speed as a property of the physical
surroundings of a mechanical system. The primary goal is
to detect significant changes or deviations of the vibration.
Primary characteristics:
Output Value Vibration Level
Unit mm/s
Vibration frequency
range
10...1000 Hz
Measurement
range
1)
0…1770 mm/s
Detectable range of
the vibration
acceleration
0...16 g
Measurement error ±10%
1)
The vibration velocity range is frequency-dependent. The specified
value is the theoretical maximum within this frequency range at an
acceleration of 16 g.
Tab. 5-35: Vibration detection – Primary characteristics
5.8.2 Mathematics/Algorithm
The example in Tab. 5-36 shows a typical application of
vibration monitoring.
Application example (with vibration
frequency spectrum) as input
Total result of the
measurement as
output
Description
Vibration level v-RMS
[mm/s]
A classic application is the detection of the
wear of a bearing.
2,3
The spectrum and the amplitude of the
vibration change.
4,5
A more complex mechanical system (such
as a production line) returns more complex
measurement results (spectrum).
7,1
The output value is a total value for simple
handling.
Tab. 5-36: Classic application – Detection of vibration changes
5
Secondary Device Functions (continued)
BIS M-4 _ _ -082-401-07-…
Industrial RFID-System BIS M