Namesti 1. kvetna 63, 664 34 Kurim, Czech republic
Tel.: +420 541 231 696, Fax: +420 541 231 272
www.sobriety.cz , info@sobriety.cz
Optical measuring
Non-contact optical measurement techniques are important tool in applications where it is necessary to measure very hot or inaccessible surfaces or thin components, in which connecting of measuring sensor would lead to components influence etc. Optical measurements can be performed both on planar surfaces as well as on complex 3D components, where the reconstruction of the three-dimensional information is based on composition of image from multiple cameras.
Static events
Deformation and strain measuring by using optical correlation methods provides accurate information even in areas, where other methods fail. Data are collected throughout the scanned field. In addition to the common values at various points within the area we thus gain full field information about the character of the monitored parameter, such as gradients, concentration etc.
- Non-contact measuring of deformations of components
- Shape analysis (reconstruction of 3D surface)
- Analysis with accuracy 0,01 pixels
- Common applications accuracy 0,01 mm
- Micro applications accuracy 1 µm
- Accuracy while using a microscope 10 nm
- Monitoring of movement of specific markers (coordinates and displacements export)
- Analysis of tensor deformation field, e.g. deformations, strains, velocities, accelerations
- Common strain sensitivity 0,01% (100 µm/m)
- With use of special cameras is strain sensitivity in special cases 0,005%
- Large object measurements, such as buildings and aircrafts
- Measuring of sand flow
- Component measuring up to 1200°C
Dynamics
Using optical correlation methods we can easily and accurately monitor the ongoing dynamic events. In addition to information in specific points (as is usual in car crash tests) we can easily obtain information on the distribution of all measured variables in the whole area of interest. In addition to quantitative analysis we gain a qualitative perspective, revealing gradients, concentration of variables etc.
We use high-speed cameras in combination with computer image processing, which provide a unique opportunity to penetrate the details of transient events and reveal the possible causes of unsatisfactory performance of the product.
- Dynamic events - high speed camera measuring
- Monitoring of movement of specific markers (coordinates and displacements export)
- Components measuring with temperatures up to 1200°C
Vibrations / Rotations
Vibro-graphic technique allows us very fast and periodically examine the ongoing processes, determine their frequency, display component shapes and isolate problematic sets of components in given operating frequency. This technique gives us the possibility of verification of fatigue analysis and the ability to monitor crack propagation in real components. Using additional applications and magneto-dynamic or piezoelectric shakers we are not only able to determine the response of the component to the specified frequency, but also to determine the shapes at different phases.
- Measuring of vibrating and rotating objects (Synchronization 0 - 50 kHz, common modal shape analyses 20 - 2000 Hz)
- Freezing of rotating objects by camera and light synchronization
Defectoscopy
For defects measuring we can also use a non-destructive optical method called shearography. Using this method we are able to detect defects in real time beneath the surface of an object, with a resolution up to 30 nm.
- De-lamination and other defects investigation in composites (aircraft, ships)
- Checking of helicopter propeller blades and windmill blades
- Identification of defects in tyres