Definitions

Piezoelectric sensors have established themselves as standard for the monitoring of series production processes. They are used to measure the loads and forces that are present in the machine and the tools during production. The sensors are usually placed firmly in the machine or tool parts that absorb the machining forces. Through skillful placement, they can be used both for the measurement of very small forces as well as high loads. Piezo sensors are available in various mechanical versions for gluing, cementing, inserting, bolt on/in, dowel-shaped, etc..

Piezo measuring devices generate a so-called electrical charge when they are pressed, bent or deformed in any way. The generated signals are converted by means of charge amplifiers into voltage signals, which are further processed in the evaluation electronics. They directly map the work process, e.g. in the form of a press force curve, and provide the basic information for process monitoring.

Piezo sensors are very well suited for cyclic processes in series production with correspondingly high cycle rates. For very slow or static processes they are not suitable, but are replaced by sensors based on strain gauge technology.