Method for detecting and tracking characteristics of coiled packaging material

A method (600) for detecting and tracking characteristics of a web of packaging material (102) using a first capacitor (106) disposed at a distance (d) from the web of packaging material (102) is provided. The method (600) comprises: feeding (602) a portion of the web of packaging material (102) to a first position (p) such that the portion affects a dielectric property of the first capacitor (106); measuring (604) a capacitance of the first capacitor (106) at a point in time (t); and determining (612) a characteristic through the portion of the first capacitor (106) at the point in time (t) based on the capacitance. 提供了一种用于检测和跟踪包装材料卷材(102)的特征的方法(600)，其使用布置在距离所述包装材料卷材(102)距离(d)处的第一电容器(106)。该方法(600)包括：将所述包装材料卷材(102)的部分进给(602)到第一位置(p)，使得该部分影响所述第一电容器(106)的介电特性；在时间点(t)测量(604)所述第一电容器(106)的电容；以及基于所述电容确定(612)在所述时间点(t)通过所述第一电容器(106)的所述部分的特征。