Relative-position detection method of band-like material

Abstract

The invention provides a relative-position detection method of a band-like material. The relative-position detection method is used for detecting the relative position and the width of the band-like material on a production line. According to the relative-position detection method, four electrode plates having the same size and shape are taken, every two electrode plates constitute a capacitor, the two capacitors are distributed on the left side and the right side of the production line of the tested band-like material, and the tested band-like material passes through the space between the upper two electrode plates and the lower two electrode plates of the two capacitors; the capacitance variable quantity of the capacitors is measured under the situations that the tested band-like material is not inserted and the tested band-like material is inserted, the lengths of the parts, inserted in the capacitors, of the tested band-like material are determined according to the tested band-like material, the width of the tested band-like material is determined according to geometrical distances, and deviation of the tested band-like material is determined according to the geometrical distances. The relative-position detection method is free of limitation of tested materials and environmental disturbance; when the widths of the tested materials are known and the capacitor on one side breaks down, single-side operation can be conducted.

Description

technical field [0001] The invention belongs to the technical field of measuring the relative position and width of strip materials, and specifically realizes the detection of the relative position and width through a capacitance measuring method. Background technique [0002] In the production of strip materials, the finished materials need to be wound into coils, or the strip materials need to be uncoiled and then processed. In the process of uncoiling or coiling, the center position of the material needs to be kept at the center of the production line or a certain reference line. Strip materials involve a wide variety, such as plastic film, paper, steel, aluminum, copper, etc. It can be divided into metal or non-metal, magnetic material or non-magnetic material. In the prior art, several detection methods such as inductive type and photoelectric type are used to realize positioning. Among them, the inductive detection method can only detect magnetic materials, and the ...

AI Technical Summary

Problems solved by technology

Among them, the inductive detection method can only detect magnetic materials, and the photoelectric detection method can only detect materials with low transparency, and is seriously interfered by ambient light, dust and other pollution.

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