PSV-400 Scanning Vibrometer - Technical Data

General Specifications

 

Working distance

> 0.4 m
(shorter distances accessible by using close-up unit)

Laser wavelength

633 nm, visible beam

Laser protection class

Class II He-Ne laser, < 1 mW, eye-safe

Sample size

Several mm² up to m² range

Scan grid

Multiple grid densities and coordinate systems (polar, cartesian and hexagonal) each with up to 512 x 512 points

    
Configurations

 

PSV-400-B

Basic Scanning Vibrometer

2 channels, 40 kHz, 10 m/s

PSV-400-H4

High End Scanning Vibrometer

4 channels, 80 KHz, 10 m/s

PSV-400-H4-S

High Amplitude Scanning Vibrometer

4 channels, 80 KHz, 20 m/s

PSV-400-M2

Wide Bandwidth Dual Channel Scanning Vibrometer

2 channels, 1 MHz, 10 m/s

PSV-400-M4

Wide Bandwidth Four Channel Scanning Vibrometer

4 channels, 1 MHz, 10 m/s

PSV-400-M2-20

20 MHz Scanning Vibrometer

2 channels, 20 MHz, 10 m/s

    
PSV-400 Hardware

 

Sensor Head
  PSV-I-400

 

 

 

 

 

Components:

  • High sensitivity vibrometer sensor model OFV-505
  • High precision scan unit (scanning range ± 20° about X, Y)
    Angular resolution < 0.002°, angular stability < 0.01° /hr
  • Color video camera with Auto Focus and 72x Zoom
    (4x digital, 18x optical)

Features:

  • Scan speed up to 50 points/s
  • Individual focusing of each scan point utilizing remote focus control with memory position function
  • Mountable rangefinder for acquisition of test sample geometry (optional)
  • Working distance > 0.4 m (standard)
  • Weight 7.5 kg
  • Dimensions (L x H x W)  365 mm x 160 mm x 190 mm

Vibrometer Controller
  OFV-5000

  • Velocity ranges: 2/10/50/100/1000 [mm/s/V]
          (PSV-400-B: 10/100/1000 [mm/s/V];
          (PSV-400-M2-20: 5/25/125/1000 [mm/s/V]; 
           further ranges dependent on the decoder configuration)
  • Bandwidth: 1.5 MHz (PSV-400-M2-20: 20 MHz)
  • Four analog low pass filters with limit frequency 5 kHz,
    20 kHz, 100 kHz and 1.5 MHz resp.
  • RS 232 interface for remote control by the Data Management System

Junction Box
  PSV-E-401

Interface between PSV-I-400 Sensor Head, OFV-5000 Vibrometer Controller and the Data Management System

  • Input for up to 4 analog signals, triggers and gate available on BNC connectors, ICP-compatible
  • Output for signal generator available on BNC connectors

Junction Box Extension  
PSV-A-408
(option for PSV-400-H4 only)

Additional 4 acquistion channels with corresponding BNC connectors in a separate 19" cabinet

Data Management System 
  PSV-W-400

State-of-the-art rack-mountable industrial PC equipped with:

  • DVD-Recorder
  • 21“ LCD Display
  • 100 MB Ethernet network connection
  • Data acquisition:
    PSV-400-B           2 channels, 40 kHz bandwidth
    PSV-400-H4         4 channels, 80 kHz bandwidth
    PSV-400-H4-S      4 channels, 80 kHz bandwidth
    PSV-400-M2        2 channels, 1 MHz bandwidth
    PSV-400-M4        4 channels, 1 MHz bandwidth
    PSV-400-M2-20   2 channels, 20 MHz bandwidth
  • Signal generator
  • Operating system Windows® XP
    (German, English and Japanese version available)

Systems cabinet, rollable (optional)

Houses PC Workstation, Vibrometer Controller, Junction Box
and Data Management System

Motorized pan/tilt head
(optional)

Maximum panning angle (horizontal): ± 90°,
Maximum tilt angle (vertical): ± 84°

 

    
PSV-400 Software Features

 

 

2D Alignment

Simple and interactive procedure to align the coordinates of the
video image to the coordinates of the scanners

Scan grid definition

Two alternatives:

  • Manual, interactive definition in the live video image by APS Pro-fessional (Advanced Point Selection), allows multiple grid densities and coordinate systems (polar, cartesian and hexagonal) each with
    up to 512 x 512 points combined in one scan
  • Data import from CAD- and FEM-systems via Universal File Format (UFF) or ASCII or binary from MEscope (optional)

Focus control
  • Focus Scan and Focus Memory used to determine and save the optimum focus position of each respective scan point

Data acquisition
  • Simultaneous data acquisition from up to 4 channels (vibrometer signal, 3 reference signals)
  • Acquisition modes: FFT; zoom-FFT (optional available except for B);
                              fast scan (optional for B); multi frame
                              (optional, only for H); time mode (optional)
  • Digital filtering and averaging available
  • Trigger options: external, analog, pre and post trigger

Data quality

Continuous assessment of the S/N ratio in order to improve data
quality by Signal Enhancement (increased number of samples used for averaging) and Speckle Tracking

Target data
  • Velocity is measured; displacement (calculated by integration of velocity) and acceleration (calculated by differentiation) can also be displayed
  • Data are saved in form of either spectra or time signal (optional for scan data)
  • Calculation of transfer functions between primary and reference signals: FRF, H1, H2, Coherence, Autopower, Crosspower

Data presentation

Spectral presentation:

  • Spectrum averaged over all scan points
  • Spectra of individual points

Display of video image overlaid with measured data and various presentation modes of deflection shapes:

  • 2D: color map presentation of vibration data
  • 3D: 3-dimensional presentation of vibration data
  • Isolines: equivalent values are interconnected by colored isolines
  • Scan point: Each scan point is depicted as a square symbol colored according to the measured value

Profile representation of section cuts across the test sample which are created interactively

Data export
  • Windows® Automation Interface: Polytec FileAccess
    (enables data access utilizing Visual Basic or C++)
  • Export of geometry data, spectra, time signals and deflection shapes as UFF- and ASCII-file (Excel format), optional
  • Export of animated 2D- and 3D-models and profiles as AVI-file

Signal generation

The internal signal generator is used to create specific excitation signals