BISOPE series
38- Instrument level difference between Vibrometer (vibration meter) and FFT
(frequency analyzer; multi-channel vibration analyzer)
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Unlike temperature measurement, where you can select
only Celsius or Fahrenheit and press a button, you need to know a lot about
'vibration' before measuring. How to select units and how far is the frequency range? What
are the types of sensors and how to attach them? Also where? in which
direction? Everyone should know how to measure. As a metaphor, 'knowledge
is something that is easy for those who know it, unlike wisdom that is
difficult even if you know it.' If you know about the vibration, it is easy to
measure the selectivity of the instrument.
Distinct difference between vibrometer
(vibrometer and frequency analyzer FFT vibration analyzer)
Recent vibrometers that can perform simple spectrum
frequency analysis and trend storage are being sold at low prices, but in
general, vibrometers do not have as precise or diverse functions as FFT
(vibration frequency analyzer). Therefore, it is necessary to know the
practical optimal knowledge that can identify these differences, and refer to
the following.
|
item |
vibrometer |
Frequency
analyzer (FFT, multi-channel vibration analyzer) |
|
Appearance |
|
|
|
output |
|
|
|
Types and uses of instrumentation |
Magnet-attached or probe-type machine
surface vibration measurement, machine condition management |
Select
the number of simultaneous measurement channels, whether to measure FRF
(resonance), machine diagnosis, long term recording (DAQ), rotor dynamics,
front-end or hand held, for Labs and machine analysis |
|
Sensor selection |
-The magnet attached type is better than
the probe stick type because measurement stability and high frequency are
possible. -Sensitivity modifiable instrument (high sensitivity,
high impact measurement possible) -Sensitivity
modifiable instrument (high sensitivity, high impact measurement possible) |
-For low
frequency detection (using displacement sensor and DC sensor, or using
acceleration of 500mV/g or higher) -General
type acceleration sensor (100mV/g) -High
impact acceleration sensor (10mV/g) |
|
Unit |
This data is very
realistic and it is the result confirmed in the actual domestic industrial
field, but it can be subjective and biased, so please refer to it.
All
copyright korea CBM written by BISOPE , vs72@naver.com, 070-4388-0415, www.kCBM.kr
#vibration measurement, #vibration
accelerometer, #sensor attachment method, #contact resonance frequency, #FFT,
#vibrometer, #vibration sensor, #3 axis vibration, #frequency, #resonance,
#resonance analysis, #resonance measurement, #frequency measurement, #vibration
and noise education, #frequency analysis, #monitoring, #vibration measurement,
#vibration diagnosis, #facility diagnosis
