The Q-100 ESPI Strain Sensor is a unique device for rapid strain measurement on any component without preparation or marking. The Q-100 ESPI Strain Sensor is positioned on the surface of the area to be inspected (using adapter rings). It automatically analyzes the surface contour and three-dimensional deformation of the inspected area when a load is applied to the component. From these data the complete strain field is derived within seconds.

Q-100 ESPI Strain Measurement Sensor  requires nearly no preparation work and can significantly reduce the testing time for complex components compared to traditional methods like strain gauges.

Q-100 ESPI Strain Sensor uses the principle of 3D speckle interferometry to measure the deformation and the surface contour of the measuring field. The measurement surface is illuminated with laser beams from 4 different directions and the scattered light is recorded with a central CCD chip. Using the interference effects of the laser light, the surface displacement is measured with sub micrometer accuracy. Additionally, the three-dimensional surface geometry is recorded. This allows the user to quantify the three dimensional surface deformation and strain field automatically. With known material properties (Young’s E-modulus, Poisson ratio) the stress distribution can also be determined in the measurement area.

The sensor head is directly attached to the component to be inspected. The basic system contains a set of different mounting devices, which easily allow the adaptation of the Q-100 ESPI Strain Sensor head to curved and flat surfaces. Q-100 ESPI Strain Sensor is readily calibrated and does not require special elaborate training for reliable use. It is easy to operate and can be applied, quickly, in a wide variety of testing set-ups.