Metal Detection in Food Manufacturing Industry
Metal particles caused by wear and splintering in food manufacturing machinery can be detected using a balanced coil arrangement. A transmitter coil generates a high-frequency electromagnetic field. Metal particles passing through this field will cause a phase displacement in the two receiver coils, which is processed by a DSP system and induces the rejection of contaminated products. The signal processing algorithms must be adaptive to compensate for phase displacements caused by the product itself, e.g. by the packaging.