Method for detecting and tracking a feature of a web of packaging material
AssigneeTetra Laval Holdings & Finance S.A.
InventorGabriele Borelli
Life of this patent
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Abstract
A method (600) for detecting and tracking a feature of a web of packaging material (102), using a first capacitor (106) placed at a distance (d) from the web of packaging material (102) is provided. The method (600) comprises; feeding (602) a section of the web of packaging material (102) to a first position (p), so that the section influences a dielectric property of the first capacitor (106), measuring (604), at a point of time (t), a capacitance of the first capacitor (106), and determining (612) the feature of the section passing the first capacitor (106) at the point of time (t), based on the capacitance.
Claims14
A method for detecting and tracking a feature of a section of a web of packaging material, using a first capacitor placed at a distance from the web of packaging material, the method comprising:
- feeding the section of the web of packaging material to a first position, so that the section influences a dielectric property of the first capacitor;
- measuring, at a point of time, a capacitance of the first capacitor;
- determining the feature of the section passing the first capacitor at the point of time based on the capacitance;
- tracking the feature through a roll fed packaging machine using the point of time of the measurement;
- and
- adapting settings of a device of the roll fed packaging machine based on the feature.
An arrangement for detecting and tracking a feature of a section of a web of packaging material in a roll fed packaging machine, the arrangement comprising:
- a first capacitor;
- a capacitor measurement unit;
- and
- a control unit comprising a processor and a memory, the control unit being communicatively connected to the first capacitor, wherein the control unit is configured to:
- send a request to the capacitor measurement unit to inject a known number of charges to the first capacitor placed at a distance from the web of packaging material,
- receive indication that the section of the web of packaging material has been fed to a first position, so that the section influences a dielectric property of the first capacitor,
- measure, by the capacitor measurement unit, at a point of time, a capacitance of the first capacitor, and
- determine the feature of the section passing the first capacitor at the point of time, based on the capacitance.
Dependencies are inferred from the claim text.