文档介绍：Introduction
This booklet answers some of the basic questions asked
by the er to vibration measurement. It gives a
brief explanation to the following:
See Page See Page
Why do we measure vibration? 2 & 3 Environmental Influences — Cable Noise 19
Where does e from? 3 Other Environmental Influences 20 & 21
What is vibration? 4 Accelerometer calibration 22
How to quantify the vibration level 5 A simple calibrator 23
The vibration parameters, Acceleration, Force and impedance measurements 24
Velocity and Displacement 6 Logarithmic scales and decibels 25
Measurement Units 6 Why use an accelerometer preamplifier? 26
Which parameter to measure 7 The vibration meter 27
The piezoelectric accelerometer 8 What is frequency analysis? 28
Practical accelerometer designs 9 Constant bandwidth or constant percentage
Accelerometer types 10 bandwidth frequency analysis 29
Accelerometer characteristics 11 Filter bandwidth considerations 30
Accelerometer frequency range 12 Defining the filter bandwidth 31
Avoiding errors due to accelerometer resonance 13 Measuring instrumentation 32
Choosing a mounting position for the Recording results 33
accelerometer 14 Using vibration measurements 34
How to mount the accelerometer 15 & 16 Vibration as a machine condition indicator 35
Environmental Influences — General 17 Vibration trouble shooting charts 36 & 37
Environmental Influences — Temperature 18
Vibration and the human body 38
1
Revision September 1982
Background
Since man began to build machines for industrial use,
and especially since motors have been used to power
them, problems of vibration reduction and isolation have
engaged engineers.
Gradually, as vibration isolation and reduction tech-
niques have e an integral part of machine design,
the need for accurate measurement and analysis of me-
chanical vibration has grown. This need was largely sa-
tisfied, for the slow and robust machines of