Table of Contents
Advertisement
7. APPLICATIONS
The versatility of the 2010 enables the instrument to be used for many
applications in acoustics and vibration. A few possible applications are out-
lined below.
7.1. CONSTANT AND PROGRAMMED BANDWIDTH ANALYSIS
Analysis with a constant or programmable bandwidth down to 3.16 Hz
enables accurate frequency determination which may be important for
instance in machine noise or vibration investigations.
The recording shown
in
Fig.7.1a is an analysis of the vibration obtained
on the housing of a small electric motor. The transducer used is a B & K
Type 4339 Accelerometer. The set-up is shown in Fig.7.2.
In order to make a further investigation of the peaks in the range 250Hz
to 400Hz, the frequency scale can be changed to "Lin x0.1", and the
c c c c c c
~~I~Kb
i
Briiel & Kjatr
~
Potontl.,...••
t.
50
.IR f,dlfl•
D.C.
Copenhogon
Moo .........
Obj.,
~
I~
·
1Cl
~
~1
Sign.
,
P.M
Qp 1124
-2C
dB
II
·30
I-4C
Multiply
f,~_::;
Seolo by
llriiol &
KJ-
B•uol
&
Ki ..
,
en
largedo 0 D D 0 D 0 0 0 0 0 0 D D 0 0 0 D 0 0 0 0 0 0 0
L .....
u ...
n.q.,
~z
Yk
Spoo¢
63
mmfw<:.
Pa.-s-G'
10
mmf"'<·
~-~
dB
; 8-160
16~145
z.
A
_c
;
I
o.l o
Fig.l.1.a.
Frequency analysis of the vibrations of a small electric motor
(Log. sweep)
74
Advertisement
Table of Contents
