PSV-400-3D Scanning Vibrometer
Acquire and Analyze Vibrations in Three Dimensions
Three-dimensional scanning laser vibrometry is a unique tool for test and simulation engineers to quickly and accurately determine operational deflection shapes and eigenmodes of complex objects across a wide range of frequencies. Measurement data are reliable if they reflect the actual vibration characteristics of the real object. This is precisely what the non-contact method guarantees. With its advanced technology and high-performance measurement, analysis and presentation software, the PSV-400-3D allows you to easily investigate solutions to complex structural dynamic issues in research and development.
- Short set-up time
- Fast, precise, non-contact three-dimensional measuring technique
- Complete acquisition of the optically accessible three-dimensional vibration vectors
- Use of either a predefined (after importing geometry data) or interactively created scan mesh
- Simultaneous measurement using three linear independently oriented sensor heads
- High spatial resolution
- Simple calibration of the sensor head`s position in the moving object’s coordinate system
- Intuitive presentation of the measurement results in 3-D animation
- Clear separation of the out-of-plane and in-plane components in 3-D-animation
- Export of data in UFF and other formats for processing in modal analysis systems
- Easy and intuitive to operate
- Non-contact and surface independent
- Geometry and dynamics – the entire measurement task in 3-D
- High point density, high frequencies – precise model comparison
- Cost-effective and seamless integration into the CAE world
- With RoboVib, the PSV-400-3D can be expanded to a fully automated test station for maximized efficiency in modal testing and NVH optimization
- Ultrasonic dynamics is analyzed and visualized with the PSV-400-3D-M High Frequency Version
- Dynamic stress & strain evaluation with the optional StrainProcessor
Polytec's PSV-400-3D is based on the technology of our well-established PSV (Polytec scanning Vibrometers). By using three independent scanning vibrometer sensor heads and controllers, vibration velocity measurements are made simultaneously from three different directions for each respective sample point. The three sensors are controlled centrally by the PSV measurement and control software. Knowing the geometry of the measurement object, the x,y, and vibration components can be calculated from the angles of incidence of the lasers. The results can be directly compared with conventional contact triax accelerometers.
Performing a typical measurement involves these simple steps:
- Position the sensor heads in front of the object to be measured
- Train the space coordinate system
- Define the sample points on the object
- Set the parameters for analog and digital acquisition of measurement values
- Start the scan
- Evaluate and/or export the data
PSV-A-450 Alignment Sample
The precision of the PSV-3D is determined not only by the precision of the sensor, but also by a precise definition of the position of the three sensor heads in space. The procedure to acquire this specific information, called 3-D alignment, is supported for high-precision or high-frequency measurements by this reference object. It features a tripod adapter for VIB-A-T02 tripods for convenient positioning and adjustment in front of the actual measurement object.
Precisely machined and marked reference points with known coordinates and a well-balanced distribution of these marks in space allow a precisely defined basic alignment of the PSV-3D measurement system for perfect results.
A-CAZ-1000 External Video Camera
External digital camera with macro zoom lens for the PSV-3D Scanning Vibrometer Systems. Allows precise measurement point definition on small samples. Provides higher resolution than the internal camera of the legacy PSV-400 series for small objects and short working distances.
- Resolution 1034 x 779 pixels
- 1/4" thread adapter for tripod mounting
Includes a 1/3" C-mount macro zoom lens
- Focal length 8.5 mm - 90 mm
- Minimum working distance 178 mm
- Smallest field-of-view 6 x 8 mm
Mounting adapters are provided also for the tripod systems PSV-A-T51, PSV-A-T51 and PSV-A-T34 tripod systems.
PSV-A-HeNe Helium-Neon Block filter
Notch filter for improvement of laser spot visibility when measuring very small parts or mirror-like surfaces.
PSV-A-T34 Near-Field PSV-3D Stand
Rigid support for three PSV-500 or PSV-400 scan heads. The angle between the scan heads is optimized and balanced for resolution of all vibrational components (in-plane and out-of-plane). Support for A-CAZ-1000 and PSV-A-515-Z cameras.
The tripod is an essential accessory for the measurement of small parts and very helpful for dynamic strain measurements with the PSV-3D
PSV-S-TRIA Optimizing 3-D Geometry
Software Option for PSV Software (version 8.6 or higher) optimizing the measurement point geometry with the PSV-500-3D by image processing. Boosts the accuracy of the geometry measurement of the Geometry Scan Unit especially for small objects, for high-frequency measurement and for strain measurement.
A-MIR-2030 Mirror Set
PSV-A-MIR / PSV-A-MIR+ Mirror Set
Mirror set for measurements in difficult-to-access areas. The mirror set comprises 4 (PSV-A-MIR+: 5) high-quality coated mirrors plus magnetic base holders.
PSV-A-PDA Remote Control Unit
An optional PDA-based wireless control is available for added setup convenience, e.g. for accurate targeting of alignment and reference points. A PDA (mobile handheld computer) can be used to remotely control the PDA thereby supports the same functions as the handset PSV-Z-051. The connection with the PSV PC is made using WLAN.
PSV-A-420 Geometry Scan Unit
Laser-based distance sensor for the direct acquisition of 3-D geometry data. The Geometry Scan Unit comprises an optical distance sensor and full software integration with the PSV program (version 8.2 onwards) and it extends the capabilities of the PSV-I-400 scanning head to work as a 3-D geometry acquisition system. Attached to the PSV-I-400 scanning head it measures the x, y and z component of every defined measurement point or reference point. The Geometry Scan Unit includes software modules with the following features:
- User-defined object coordinate system
- Single-shot distance measurement
- Scanning distance measurement
- Visualization of geometry with overlaid vibration data
- Definition of reference points for 3-D alignment (PSV-400-3D)
- Geometry data export to UFF files
On smaller objects a software solution based on image processing is available for PSV-400-3D systems: VideoTriangulation.
Not available for the PSV-400-B Basic Scanning Vibrometer.
PSV-A-430 Acoustic Gate Unit
Designed for applications such as brake squeal measurements. This unit activates the gate input of the PSV-400 if a noise exceeds a certain threshold in a defined frequency band (band pass filter). The scanning measurement starts when the noise is present and pauses when no noise within the band is present. Easy adjustment of the parameters and non-volatile memory for settings.
Parameters: center frequency 500 Hz – 15 kHz; bandwidth 10% - 50% of center frequency ; threshold 2 mV – 20 mV.
General System Specifications
0 – 80 kHz (PSV-400-3D-M: 1 MHz)
0.01 µm/s ... 10 m/s
> 0.4 m
633 nm (red)
Laser safety class
Class II He-Ne laser, 1 mW per sensor, eye-safe
Several mm² up to m² range