Description
The ScanSet is a modular opto-mechanical system that can be combined with any standard single-point laser Doppler vibrometer and upgrades it to a fully capable scanning laser Doppler vibrometer with minimal effort. A quick-release mounting mechanism securely holds the attached laser Doppler vibrometer in place, after which it can be precisely positioned using sensitive linear guides.
Inside the ScanSet, a high-precision mirror assembly automatically directs the laser beam to freely selectable points on the measurement surface. An integrated camera captures the test object and provides the live image to the measurement software. Measurement points can be defined intuitively directly on the camera image; the ScanSet’s optics then automatically align themselves so that the laser hits the selected coordinates with precision.
The ScanSet features its own analog inputs for laser and reference signals to ensure reliable data acquisition. The associated measurement and analysis software processes the recorded vibration data quickly and provides a clear graphical representation of the results. This transforms an existing single-point laser Doppler vibrometer into a powerful and versatile scanning system in no time.
Advantages & Innovations
- Approximately 50 to 80% cheaper than standard complete systems on the market
- Existing single-point laser vibrometers can be used
- Works with all common single-point laser Doppler vibrometers
- Direct interface/data transfer to the vModal software
- Operating deflection shape analysis in the time domain
- Swivel CDD camera
- User-friendly software
- Data acquisition can also be used as a simple FFT analyzer
- Mobile measuring system
- Use of different LDV depending on the application
- Generator output for controlling excitation systems (shaker)
- High-tech innovation Made in Germany
- DAkkS calibration (DIN EN ISO/IEC 17025) possible
Application & Integration
- Research and development
- Experimental modal analysis
- Visualization of wave propagation
- Optimization of development-related simulations
- Test stands
- Series testing
- Quality control
ScanSet components:
Scanning laser vibrometer
The ScanSet is made of robust aluminum and, in addition to the high-precision laser beam deflection unit, has a CCD camera for imaging the measurement objects. To ensure that the laser beam of any laser vibrometer hits the mirror adjustment axes exactly when set to zero, the ScanSet has linear adjustment units that can be fixed and reliably locked using clamping levers. When measuring with the ScanSet, the quality of the measurement data only depends on the properties and quality of the laser vibrometer used. The electrical connection to the controller is made via a central control cable which supplies the mirror unit with voltage, ensures mirror and camera control and the transmission of the video image.
Controller
In addition to the power supply, the controller contains the control unit for the mirrors and the measurement data acquisition. It is connected to the ScanSet via a central control cable. The inputs for the measurement data and the generator output are brought out as BNC sockets. Communication with the measuring PC takes place via a USB cable. The software uses it to control the mirrors, the CCD camera and transfers the measurement data and the video image to the measuring computer.
Software
The measurement and analysis software contains all the modules required to carry out a laser scanning measurement
- CCD image capture, live display
- Geometry and measurement point editor
- FFT analyzer with a wide range of functions
- Mirror control and control
- Operating deflection shape analysis (ODS)
- Animation, AVI export, UFF, ASCII and MatLab export
- Free offline version
- Modal analysis module (optional)
- Windows 10/11 operating system
- NEW! Module for operational deflection shape analysis in the time domain (optional)
Technical data
| Type | ScanSet-20kHz | ScanSet-80kHz | ScanSet-2MHz |
|---|---|---|---|
| Channel number | 4 | 3 | 2 |
| AD converter | 24-bit | 24-bit | 16-bit |
| Frequency range | 1Hz-20kHz | 1Hz-80kHz | 1kHz-2MHz |
| Frequency resolution | 25600 FFT lines | 25600 FFT lines | 25600 FFT lines |
| Input voltages | ±1V, ±10V | ±1V, ±10V | ±2,5V |
| Coupling | AC, DC, IEPE | AC, DC, IEPE | DC |
| Anti-aliasing filter | Automatically fed | Automatically fed | Automatically fed |
| Generator | Sine, Chirp, Noise and Step Sine | Sinus, Chirp, Rauschen und Step Sinus | No |
Modul for operating deflection shape analysis in the time domain
Reproducible transient processes can be captured and saved sequentially with the ScanSet. If the measurements are triggered via a reference channel, the individual measurements can be combined into a multi-channel measurement with synchronous time signals. These can be played graphically animated. This results in a slower representation of transient processes in technical structures. Typical applications
- Animated representation of wave propagation in components
- Detection of defects (delaminations) in fiber composite materials
- Representation of periodic movements of machine components
The example shows the wave propagation in a brake disc during shock excitation measured with 2500 individual measurements. (See video ScanSet wave propagation)
Videos
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