Structurally integrated strain gauge HBM

The increased use of fiber composites and the systematic optimization of components presuppose a precise knowledge of the load situation. In many applications, sensor integration is the only way to meet the demand for modern lightweight structures with regard to production control, load monitoring, damage analysis and control signal generation.

HBM’s new LI66 strain gages are directly embedded in the structure during the fiber composite production process. This allows measurements at spots that are no longer accessible after production.

The most obvious feature of the LI66 strain gage is the two vertically attached contact pins, for contacting the strain gage embedded in the material. The measuring leads are only connected to the gold-plated pins after manufacture, outside the structure, which makes all the handling easier.

The LI66 strain gage is of a symmetrical design, with structural strain being applied equally to the measuring grid from both sides. Depending on the requirement, the user can decide whether the pins should be contacted inside the structure or on the outside. Thus, for example, with sandwich structures, the measuring leads or customized electronics can be introduced into the foam core.

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