Abstract: A measuring assembly with a mechanical excitation device that excites the metal belt of a transport device at an excitation frequency (fA) to produce mechanical vibrations. Analog measurement signals (MA) characterizing the amplitude (A) of the excited mechanical vibrations are detected for corresponding regions of the metal belt using sensor elements. The measurement signals (MA) are digitized with digitization devices and the digitized measurement signals or signals derived therefrom are transmitted from the digitization devices to an evaluation device arranged outside of the measuring assembly as transmitted signals (MA?). The sensor elements comprise eddy current sensors. The eddy current sensors, which directly adjoin one another when viewed in the width direction are operated using different operating frequencies (f1, f2, f3). When the sensor elements are viewed as a whole, a plurality of sensor elements are operated using the same operating frequency (f1, f2, f3).

Abstract: A measuring assembly with a mechanical excitation device that excites the metal belt of a transport device at an excitation frequency (fA) to produce mechanical vibrations. Analog measurement signals (MA) characterizing the amplitude (A) of the excited mechanical vibrations are detected for corresponding regions of the metal belt using sensor elements. The measurement signals (MA) are digitized with digitization devices and the digitized measurement signals or signals derived therefrom are transmitted from the digitization devices to an evaluation device arranged outside of the measuring assembly as transmitted signals (MA?). The sensor elements comprise eddy current sensors. The eddy current sensors, which directly adjoin one another when viewed in the width direction are operated using different operating frequencies (f1, f2, f3). When the sensor elements are viewed as a whole, a plurality of sensor elements are operated using the same operating frequency (f1, f2, f3).

Abstract: A measuring assembly with a mechanical excitation device that excites the metal belt of a transport device at an excitation frequency (fA) to produce mechanical vibrations. The measuring assembly has a metal plate that faces the metal belt. The metal plate is equipped with sensor elements which are offset relative to one another when viewed in the belt width direction with which measurement signals (MA) that characterize the amplitude (A) of the excited mechanical vibrations are detected for corresponding regions of the metal belt. The sensor elements protrude beyond the upper face of the metal plate and up to the metal belt. A cover for the measuring assembly that is made of an electrically insulating material covers the sensor elements on the upper face thereof, and laterally seals the sensor elements.