Structure-Borne Noise Monitoring

Sound propagating in a solid is called structure-borne noise. This sound can be used to monitor grinding machine processes. If the grinding wheel touches the workpiece, a structure-borne noise is caused. The intensity and frequency of the generated sound depends on various factors: the grinding performance, the type and condition of the grinding wheel, the speed of the grinding wheel and the workpiece, as well as the workpiece material.

Structure-borne noise monitoring is available in various designs (image sensor types). For every grinding machine Elaso offers a suitable sensor, so that everyone can achieve optimal results.

Structure-borne noise monitoring by Elaso AG can be used in various fields of application:

GAP Control

The main application of structure-borne noise monitoring is the so-called GAP Control. The acronym GAP stands for Grinding Analysis Process and has the task of monitoring and optimizing the grinding process. With this product the unwanted air grinding time is shortened and nevertheless the contact between grinding wheel and workpiece is precisely recorded in order to initiate the grinding process.


When dressing the grinding wheel, a similar structure-borne sound signal is generated as during grinding. If interruptions of the structure-borne noise can be detected during the dressing process, it must be assumed that the grinding wheel still has depressions and thus is not yet properly dressed.

Crash Control

There is a need to be able to predict possible collisions on the machine in order to be able to react accordingly so that machine damage is minimized or prevented. Under certain circumstances, this is possible with structure-borne noise monitoring. It is assumed that a collision causes a strong structure-borne noise. The amplifier of the control can be adjusted so that the output can be used as a crash detection.