Special testing

  • Zero G Landing ( 1500 kg Phootprint Lander)
  • Space mechanisms testing ( stiffness, load, deformations, vibrations )
  • Thermal-vacuum testing of special components
Universal test facility 12x12x5 m / 12 500 kg crane handling

Universal test facility 12x12x5 m / 12 500 kg crane handling

Clean room testing at frentech aerospace

Clean room testing at Frentech aerospace

Optical measurements

měřící technikaNon-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.
Besides optical measurement we provide strain gauge measurements and measurement of residual stress.

Statics
Statics
Statics
Example of use
  • 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.
We provide optical measurement as well as strain gauge measurement and other forms of contact measuring.

Dynamics
Dynamics
Dynamics
Example of use
  • Dynamic events - high speed camera measuring
  • Monitoring of movement of specific markers (coordinates and displacements export)
  • Components measuring with temperatures up to 1200°C

DEFECTOSCOPY

shearography For defectoscopy we use conventional measuring methods as well as optical methods. We focus on the electrical potential method for identification of weld joint crevices during factory operation, even at high temperatures. Furthermore, we monitor material thickness changes caused by corrosion or material creep due to high temperatures. This method is can be successfully applied to hardly accessible spots for long-term online monitoring or for regular checks.
For defects measuring we also use a non-destructive optical method called Shearography. Using this method we are able to detect defects beneath the object surface in real time, with a resolution up to 30 nm.

Measuring
Measuring
Example of use
  • De-lamination and other defects investigation in composites (aircraft, ships)
  • Checking of helicopter propeller blades and windmill blades
  • Identification of defects in tyres

VIBRATION / ROTATION / ROTORDYNAMICS

We provide rotordynamics parameters measuring in operation and laboratory conditions. For these kind of measurements deviation sensors and accelerometers are used.
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.

rotordynamics measuring
rotordynamics measuring
rotordynamics measuring
rotordynamics measuring
rotordynamics measuring
rotordynamics measuring
vibration measuring
rotordynamics measuring
Example of use
  • 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