Method for forming and detecting security elements on the surface of a component or in a component, and system for detecting said security element

Patent metadata

Field	Value
Publication number	US-11040564-B2
Application number	US-201716099105-A
Country	US
Kind code	B2
Filing date	Apr 26, 2017
Priority date	May 4, 2016
Publication date	Jun 22, 2021
Grant date	Jun 22, 2021

Abstract

The invention relates to a method for forming and detecting security elements on the surface of a component and/or in a component, in which at least one layer or at least one region that is preferably formed of a magnetic material or of a material different from the component material is formed on the surface of the component and/or in the component that is formed of a magnetic or of a nonmagnetic material in a locally and geometrically defined manner. At least one ablated track, at least one heat-affected region and/or at least one remelted treatment track are/is formed by a locally and geometrically defined ablation of material or input of energy on/at the surface of a component along a predefined contour corresponding to the respective security feature. In the manufacture of the component, a magnetic material different from the material of the component is introduced into the component at at least one predefined position in a locally and geometrically defined manner by way of a generative production process. To detect the security element, a magnetization unit is used to generate at least one magnetic field penetrating into the component or a magnetic flux is produced inside the magnetization unit that penetrates into the component. To check a security element formed in this way, a detection unit is used to detect the magnetic stray fields occurring on the security element as a result of the at least one magnetic field, and the measurement signals captured by the detection unit are transferred to an evaluation unit having an image-processing or pattern-recognition system. Using the evaluation unit having an image-processing or pattern-recognition system, it is checked, by way of the detected magnetic stray fields, whether or not the detected security element corresponds to a specification.

First claim

The invention claimed is:

1. A method for forming and detecting security elements on the surface of a component or in a component, in which
at least one layer or at least one region formed of a magnetic material or of a material different from a component material is formed on the surface of the component or in the component formed of a magnetic or of a non-magnetic material in a locally and geometrically defined manner,
wherein
at least one ablated track, at least one heat-affected region, or at least one remelted treatment track is formed by a locally and geometrically defined ablation of material or input of energy on/at the surface of a component along a predefined contour corresponding to a respective security feature or
in the manufacture of the component, a magnetic material different from the material of the component is introduced into the component at least one predefined position in a locally and geometrically defined manner by way of a generative production process

and
to detect a security element, a magnetization unit is used to generate at least one magnetic field penetrating into the component or a magnetic flux is produced inside the magnetization unit that penetrates into the component and
to check a security element formed in this way, a detection unit is used to detect magnetic stray fields occurring on the security element as a result of the at least one magnetic field, and measurement signals captured by the detection unit are transferred to an evaluation unit having an image-processing or pattern-recognition system, and
using the evaluation unit having an image-processing or pattern-recognition system, it is checked, by way of the detected magnetic stray fields, whether or not the detected security element corresponds to a specification.

2. The method as claimed in claim 1 , characterized in that the locally and geometrically defined ablation of material or the input of energy for forming a security element is achieved by way of an energy beam.

3. The method as claimed in claim 1 , characterized in that in the manufacture of the component a further material is introduced into the inside of the component, wherein the further material is a non-magnetic material or a magnetic material different from the material of the component.

4. The method as claimed in claim 1 , characterized in that at least one ablated track is at least partially filled with a material different from the component material.

5. The method as claimed in claim 1 , characterized in that a security feature not visible to the eye without auxiliary means and not haptically recognizable without auxiliary means is formed.

6. The method as claimed in claim 1 , characterized in that an optically non-transparent top layer is applied to a security element formed on the surface of a component.

7. The method as claimed in claim 1 , characterized in that machine-readable one-dimensional, two-dimensional or quasi-three-dimensional information is formed on the security feature.

8. The method as claimed in claim 1 , characterized in that the locally and geometrically defined ablation of material or the input of energy for forming a security element is achieved by way of an energy beam, wherein the energy beam is a laser beam, electron beam, or ion beam.

9. The method as claimed in claim 1 , characterized in that at least one ablated track is at least partially filled with a non-magnetic material.

10. The method as claimed in claim 1 , characterized in that an optically non-transparent, varnish or insulation, top layer is applied to a security element formed on the surface of a component.

Assignees

• Fraunhofer Ges Forschung
• Univ Dresden Tech

Inventors

• Siebert Rene
• Baumann Robert

Classifications

• G06V20/95

  Pattern authentication; Markers therefor; Forgery detection · CPC title

• G06K7/08

  by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes · CPC title

• G01R33/00

  Arrangements or instruments for measuring magnetic variables · CPC title

• G06K7/082

  using inductive or magnetic sensors · CPC title

• G07D7/003

  using security elements (using digital security elements G07D7/004) · CPC title