HBM launches comprehensive range for optical strain gauging

HBM has developed its fibre-optic SG, based on Bragg grating technology, as an alternative to the proven standard electric SG that have been used for decades in mechanical stress analysis. Strain is measured with light in an optical SG so that an electric signal is not needed. This gives an SG with higher insensitivity to electromagnetic interference, high-voltage potential differences and humidity. Applications in potentially explosive atmospheres are also possible.

Installation costs can be considerably reduced compared with standard SGs because the fibre acts both as sensor and signal transmission medium. Up to 13 Bragg gratings can be included as standard on a single fibre, enabling parallel measurements to be taken.

Another advantage of the fibre-optic SG is the high alternating load stability, which is a particular advantage when taking measurements on different lightweight materials. In applications on highly stressed glass-fibre materials, for example, the maximum possible number of problem-free load cycles is at least 20 times higher than with standard SG.

Follow the link for more information about HBM's OptiMet system of fibre-optic components.