Łukasiewicz Research Network – Institute of Aviation

Strain gauge tests

This is one of the most commonly used methods for measuring deformations on a given surface, they enable the determination of stresses in order to determine the strength of the structure or its elements. The tests are also used to determine the forces and moments of forces in operating conditions. The quality of the sensors and measurement systems used plays an important role.

Strain gauge tests – testing capabilities

We offer the preparation of strain gauge measuring points in various configurations, including the installation of standard foil strain gauges, including gluing and soldering. 

We perform measurements and process the obtained results, also conducting tests in operating conditions. To collect and record measurement data, we use computerized measurement and recording systems with the possibility of connecting force and displacement transducers, resistance strain gauges, thermocouples. 

The maximum number of measurement channels is 250.

Scope of tests we offer:

  • strain gauge measurements in flight,
  • measurements of operational stresses and deformations in parts of machinery, vehicles or building structures,
  • load analyses, as well as strength and fatigue analyzes of structures.

Strain gauge tests – equipment

  • CompactRIO real-time controller and NI 9237 modules;
  • CompactRIO real-time controller:
    • two Ethernet ports for network and file support via the user interface,
    • external USB memory port,
    • RS232 serial port for connecting peripheral devices – 9 to 35 VDC,
    • operating range from -20C to 55C;
  • NI 9237 modules:
    • 4 channels, ±25 mV/V, 24-bit bridge module;
    • 24-bit resolution, ± 25 mV/V analog inputs with RJ50 connector;
    • 4 simultaneously sampled analog inputs, max. sampling rate 50 kS/s;
    • programmable half and full bridge – up to 10 V internal excitation;
    • compatible with TEDS smart sensors;
    • operating range from -40C to 70C.
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