Advancing Measurements by Light www.polytec.com
PSV-400-3D Scanning Vibrometer
PSV-400 Polytec
Scanning Vibrometer
PSV-400-3D
Scanning Vibrometer
MSV-400 Microscope
Scanning Vibrometer
PMA-400 Planar
Motion Analyzer
MMA-400 Micro
Motion Analyzer
The new Polytec PSV-400-3D Scanning Vibrometer is the perfect measurement
instrument for gathering 3-dimensional vibration data from both simple and com-
plex structures. The flexibility of the system, the intuitive and highly productive user
interface and the short measurement cycle (from planning to presentation of results)
contribute significantly to a reduction in product development time and expense.
Key Features
Rapid setup and fast, non-contact
3-dimensional measurement technique
Complete acquisition of the optically
accessible 3-dimensional vibration vectors
Scan mesh predefined
(after importing geometry data)
or interactively created
Simultaneous measurement using
3 independently oriented sensor heads
High spatial resolution
Simple sensor-to-object alignment
Intuitive 3-D animation
of the measurement results
Clearly displayed separation of
Out-of-Plane and In-Plane vector
components
Advantages of Laser
Scanning Vibrometers
With outstanding bandwidth, high sensitivity,
zero mass loading and a sub millimeter-sized
probe, Polytec's laser vibrometers have
significant technical and tactical advantages
over mechanical accelerometers and acoustic
microphones.
By integrating a single-point laser vibrometer
with a dual-axis scanning mirror, Polytec exploits
the advantages of using light as the probe.
This device, known as a Scanning Vibrometer,
samples a specimen’s vibration pattern with
a reconfigurable sensor mesh composed of
many spots of light.
Polytec's recently developed PSV-400-3D
extends the power of scanning vibrometry
by measuring the vibration vector's tri-axial
components at each sampling point on a
structure’s surface.
POLYTEC SCANNING
V IBROMETERS
N O N C O N TA C T 3 - D V I B R AT I O N M A P P I N G
Principle of Operation
A single laser vibrometer measures the pro-
jection of the sampling point’s velocity vector
along the vibrometer’s optic axis. By using
three independent vibrometers co-aligned
to the same sampling point but at different
interrogation angles, the complete 3-D velocity
vector at that point can be determined.
Polytec has extended this principle in the
design of a new scanning 3-D laser vibrometer,
the PSV-400-3D. By using three PSV Scanning
Vibrometers, vibration velocity measurements
are made simultaneously from three different
directions at each respective sampling point.
The three sensors are controlled centrally
by Polytec’s PSV measurement and control
software.
Performing a typical measurement
involves these simple steps:
Position the sensor heads in front
of the object to be measured
Align (train) to the target
Define the sample points on the object
Set the data acquisition parameters
Start the scan
Evaluate and/or export the data
Performing a Measurement
The following section demonstrates the pro-
cedure using a brake disk as the test structure.
Aligning to the target
The PSV-400-3D needs to know the position
and orientation of the three sensor heads relative
to the target. This is done by the operator
targeting the three PSV-400-3D probe beams
on to between four to seven known points
on the target object, and then entering the
corresponding coordinate values.
Once entered, the PSV-400-3D calculates the
position and orientation of each sensor head.
Defining the sample points
The PSV-400-3D allows individual sample points
to be defined directly from the live video image.
Alternatively, the operator can import an exter-
nally created geometry model that has been
saved in Universal File Format. Once defined,
the scan grid can be superimposed on the test
sample as shown in Fig. 1.
Scanning the sample
Prior to the measurement, the object being
characterized must be stimulated to establish
sufficient vibration in the specimen. In the
present example, a hammer was used to strike
periodically at the brake disk. Following each
strike, the vibrations of one sample point at a
time are measured by the sensor heads.
In combination with the reference signal re-
flecting the excitation force, the full frequency
response is revealed.
2
Figure 1:
Scan points on the test object. All points are
accessible from a single sensor position.
Long before the first prototypes are built,
mechanical and structural engineers rely
on mathematical models to predict the vib-
ration characteristics of products in design.
Accurate models help produce designs that
increase product safety, reduce engineering
and manufacturing costs, expedite time-
to-market, extend product reliability and
simplify construction.
Engineers can use Polytec’s PSV-400-3D
scanning vibrometer to quickly and easily
measure the real vibration characteristics of
prototypes and preproduction products.
These measurements help refine and adjust
the model narrowing the difference between
predicted and the experimentally measured
outputs and building confidence in the
model for future predictions.
F I E L D O F A P P L I C A T I O N
Figure 4:
Frames at different phase angles of the data animation sequence show the 3-D
representation of vibration data measured on the brake disk at 2063 Hz.
Phase Full 3-D vibration In-plane vector components
Angle
0°
90°
180°
3
Figure 2:
2-D color representation of deflection
in the Z-axis direction at 2063 Hz.
Figure 3:
Isoline representation of deflection
in the Z-axis direction at 2063 Hz.
Evaluating and exporting data
After the measurements have been made, the
data can be evaluated in the PSV presentation
mode. Operating deflection shapes (ODS) of
the vibrating object can be presented as an
animation with several viewing options.
Each component of the vibration vectors can
be simply represented as a two-dimensional
color map (Fig. 2) or a set of isolines (Fig. 3).
A particularly powerful feature is the 3-D re-
presentation where the vibration data along
the X, Y, and Z axes are presented either
simultaneously or seperately (Fig. 4).
Additional presentation and analysis options
are made available by exporting the structure
geometry and the measurement data in the
Universal File Format (UFF) for further processing
by popular third-party software packages like
ME Scope, LMS and IDEAS.
4
Frequency range 0 kHz … 80 kHz
Velocity range 0 m/s … 10 m/s
Laser wavelength 633 nm (red)
Working distance > 0.4 m
Laser protection class Class II He-Ne laser, 1 mW per sensor, eye-safe
Sample size 1 mm2 to several m2
Scan grid Multiple grid densities and coordinate systems (polar, cartesian and
hexagonal) each with up to 512 x 512 points combined in one scan
System Specifications
PSV-400-3D Technical Data
Polytec's PSV-400-3D offers engineers
many new and exciting options for vibration
measurement and modal analysis. It is a vital
diagnostic tool for structural and mechanical
engineers using FEM to develop new products.
Based on the outstanding PSV-400 1-D
Scanning Vibrometer, the new instrument
acquires and displays 3-D modal data while
retaining the proven reliability of its prede-
cessor. Designed for convenience and ease
of use, the PSV-400-3D has the ability to
scan predefined measurement grids and
to simultaneously record vibration vector
components at each sample point.
The geometry model import feature and
the UFF measurement data export feature
combine to simplify and enhance the
relationship between product design, finite
element modeling and actual structural
measurements.
S U M M A R Y
5
3-D Alignment The laser beams are matched to 4 to 7 known points
of the object geometry
Using the above information, the system calculates the sensor head
positions relative to the coordinate system of the test object
Scan grid definition Two methods available:
Manual, interactive definition in the live video image
by the Advanced Point Selection (APS) Professional utility
Data import from CAD and FEM systems via Universal File Format (UFF)
Controller operation Parallel operation of all three Vibrometer Controllers
with identical parameters
Sensor control Simultaneous control of all three sensor scanning units
Data acquisition Simultaneous data acquisition from 4 channels
(3 vibrometer signals, 1 reference signal)
Digital filtering and averaging
Triggers: external, analog, pre- and post trigger
Data quality Speckle Tracking and continuous assessment of the S/N ratio
in order to improve data quality by Signal Enhancement
(number of samples used for averaging depends on signal quality)
Target data Vibration components in Cartesian coordinates
in the coordinate system of the test object
Raw vibration signal from each respective vibrometer
Velocity (measured), displacement (calculated) and
acceleration (calculated) can be displayed
Digital filtering and averaging
Data saved as frequency spectra (standard) or time signal (optional)
Calculation of the transfer functions between
reference signal and primary signal
Data representation Perspective view of the test sample’s 3-D geometry:
zero position of the object represented by a wire frame;
sample motion represented by a colored 3-D surface model
of all three vibration vectors simultaneously
Animated representation of the vibration data as deflection
from zero position and color code; provides a three-
dimensional impression of the vibration
2-D or 3-D representation of each vibration component (X, Y, Z)
Display of spectra or time signals for single measurement points
Data export
Data import
Windows Automation Interface: Polytec File Access
(enables data access utilizing Visual Basic® or C++)
Export of geometry data, spectra, time signals and
deflection shapes as ASCII files (Microsoft Excel compatible),
UFF (both standard) or ME’Scope format (optional)
Export of animated 2D- and 3D-models and profiles as an AVI file
Import of geometry data from UFF or ME’Scope files
PSV-400-3D Software Features
Te
ch
ni
ca
l s
p
ec
ifi
ca
tio
ns
a
re
s
ub
je
ct
t
o
ch
an
ge
w
ith
ou
t
no
tic
e.
L
M
_D
S_
PS
V-
40
0-
3D
_2
00
4_
06
_1
00
0_
E
Advancing Measurements by Light www.polytec.com
PSV-I-400
Sensor Head
Three independent sensor heads are used for 3-D mode
High precision dual-axis scan unit (scanning ranges ± 20°);
angular resolution < 0.002°, angular stability < 0.01°/hr
High sensitivity OFV-505 vibrometer sensor
Color video camera with Auto Focus and 72X Zoom
(4X digital, 18X optical)
Working distance > 0.4 m
OFV-5000
Vibrometer Controller
Three Controllers are used in the system (one for each measurement head)
6 velocity ranges: 1, 2, 10, 50, 100, 1000 (mm/s/V)
3-D Mode bandwidth: 0 kHz … 80 kHz;
OFV-5000 output bandwidth: 1.5 MHz
Four analog low pass filters: 5 kHz, 20 kHz, 100 kHz
and 1.5 MHz (3dB point)
RS-232 interface for remote control
by the Data Management System
Central video camera Monitors along the measurement axis (optional)
PSV-E-400
Junction Box
Interface between PSV-I-400 Sensor Heads, OFV-5000 Vibrometer
Controllers and PSV-W-400-3D Data Management System
Input for 4 analog signals, triggers and gate available
on BNC connectors, ICP® compatible
Output for signal generator available via BNC connectors
PSV-W-400-3D
Data Management
System
State-of-the-art rack-mountable industrial PC equipped with:
DVD Recorder
17" LCD Display
100 MB Ethernet network connection
Four-channel data acquisition card
for vibration frequencies up to 80 kHz
Internal signal generator providing various excitation signals
according to current PSV software
Communication with the Vibrometer Controllers
via Junction Box using USB interface
Operating system Windows® 2000 or Windows® XP Professional
(German, English and Japanese versions available)
Tripod On request
Systems cabinet Integrates Vibrometer Controllers, Junction Box and
Data Management System
Includes castors and lockable covers for transport/storage
Cable set
Connects Sensor Heads, Vibrometer Controllers,
Junction Box and Data Management System
PSV-400-3D Hardware
Windows® and Visual Basic® are registered trademarks of Microsoft Corporation. ICP® is a registered trademark of PCB, Inc.
For more information, please contact your
local Polytec application/sales engineer.
Laser Radiation
Do not stare into beam
Class 2 Laser Product
According to IEC/EN 60825-1 (2001)
Complies with 21 CFR 1040.10 and 1040.11
except for deviations pursuant to
Laser Notice no. 50, dated 26 July 2001
P ≤ 1 mW/cw; λ = 620-700 nm
Polytec GmbH
Polytec-Platz 1-7
76337 Waldbronn
Germany
Tel.+ 49 (0) 7243 604-0
Fax+ 49 (0) 7243 69944
info@polytec.de
Polytec-PI, S.A. (France)
32 rue Délizy
93694 Pantin
Tel. + 33 (0) 1 48 10 39 34
Fax + 33 (0) 1 48 10 09 66
info@polytec-pi.fr
Lambda Photometrics Ltd.
(Great Britain)
Lambda House, Batford Mill
Harpenden, Herts AL5 5BZ
Tel. + 44 (0)1582 764334
Fax + 44 (0)1582 712084
info@lambdaphoto.co.uk
Polytec KK (Japan)
Hakusan High Tech Park
1-18-2 Hakusan, Midori-ku
Yokohama-shi, 226-0006
Kanagawa-ken
Tel. +81(0) 45 938-4960
Fax +81(0) 45 938-4961
info@polytec.co.jp
Polytec, Inc. (USA)
North American Headquarters
1342 Bell Avenue, Suite 3-A
Tustin, CA 92780
Tel. +1 714 850 1835
Fax +1 714 850 1831
info@polytec.com
Midwest Office
3915 Research Park Dr.,
#A12
Ann Arbor, MI 48108
Tel. +1 734 662 4900
Fax +1 734 662 4451
East Coast Office
16 Albert Street
Auburn, MA 01501
Tel. +1 508 832 0501
Fax +1 508 832 4667
本文档为【psv_400_3D】,请使用软件OFFICE或WPS软件打开。作品中的文字与图均可以修改和编辑,
图片更改请在作品中右键图片并更换,文字修改请直接点击文字进行修改,也可以新增和删除文档中的内容。
该文档来自用户分享,如有侵权行为请发邮件ishare@vip.sina.com联系网站客服,我们会及时删除。
[版权声明] 本站所有资料为用户分享产生,若发现您的权利被侵害,请联系客服邮件isharekefu@iask.cn,我们尽快处理。
本作品所展示的图片、画像、字体、音乐的版权可能需版权方额外授权,请谨慎使用。
网站提供的党政主题相关内容(国旗、国徽、党徽..)目的在于配合国家政策宣传,仅限个人学习分享使用,禁止用于任何广告和商用目的。