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Chip-free terahertz tag and preparation method thereof

A terahertz, chipless technology, applied in the field of product labels, can solve the problems of difficult product conformal production and preparation, insufficient use of label space information, limited information capacity, etc., to achieve mass production, low production cost, and label The effect of high capacity

Pending Publication Date: 2022-04-22
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of chipless label is based on one-dimensional or two-dimensional, and does not make full use of the spatial information of the label itself, and the information capacity is relatively limited.
Moreover, the above-mentioned labels are mainly prepared or attached on rigid substrates, and for most products with non-planar structures, it is difficult to achieve conformal production and preparation with commodities.

Method used

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  • Chip-free terahertz tag and preparation method thereof
  • Chip-free terahertz tag and preparation method thereof
  • Chip-free terahertz tag and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 Terahertz label

[0035] See attached figure 1 Shown is a schematic diagram of the structure of the chipless terahertz tag of the present invention. The invention utilizes patterns of flexible multi-layer dielectric materials to form terahertz three-dimensional encoded information, so as to realize conformal and chipless terahertz tags. Specifically, due to the preparation of flexible dielectric materials, the label can be directly embedded or printed on the object to be marked in a similar manner to an optical barcode, instead of a label attached to the object, which makes the information to be recognized Directly from the object itself, not from a label placed on the object. The pattern information of each layer of dielectric material can be printed on or inside the dielectric material. The dielectric material can be low-cost plastic film, paper or other dielectric materials, so the cost of the label will be greatly reduced. Regarding the encoding of t...

Embodiment 2

[0043] Example 2 Preparation of terahertz tags

[0044] In order to make the terahertz tag of the present invention easier to produce conformally with the product, and at the same time take into account the needs of reducing costs and facilitating mass production, the preferred preparation material is a flexible material. For example, the dielectric layer can be low-cost plastic film, paper or other dielectric materials, etc., and the material of the label layer can be printed, sprayed or hot-stamped. In addition to being flexible, the choice of material only needs to have a difference between the reflectivity of the terahertz wave for the pattern of the label layer and the reflectivity of the boundary of the dielectric layer to bring about a change in the terahertz reflection spectrum.

[0045] The terahertz label of the present invention can be processed and prepared by printing, such as inkjet printing, spraying, hot stamping, or embedding.

[0046] 1) Printing method:

...

Embodiment 3

[0058] Example 3 Readout and identification of terahertz tags

[0059] See attached Figure 5 As shown in the figure, it is a method flow for realizing terahertz tag signal readout and recognition through an artificial intelligence algorithm. In this embodiment, transfer learning and deep residual network ResNet are specifically utilized. Transfer learning is a new machine learning method that uses existing knowledge to solve related problems. The purpose is to transfer existing knowledge to solve learning problems with only a small amount of labeled sample data in the target field. The main methods and steps are as follows:

[0060] (a) A terahertz imaging robot is used to perform adaptive reflection scanning on the flexible terahertz label sample, and the corresponding terahertz label signal is collected.

[0061] (b) According to the encoding rules, select part of the terahertz time-domain spectral signal of the corresponding label area as the input data for network trai...

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Abstract

The invention relates to a chipless terahertz tag and a preparation method thereof, the terahertz tag comprises a dielectric layer and a tag layer which are mutually overlapped up and down, the dielectric constants of the dielectric layer and the tag layer are different, and the dielectric layer and the tag layer are made of flexible materials. The label layer is provided with a pattern structure used for coding, and the pattern structure is arranged at the bottom of the dielectric layer on the label layer and can be prepared in the mode of printing or transfer printing embedding or the like. According to the terahertz tag, three-dimensional coding can be achieved, the tag capacity is high, the tag manufacturing cost is low, the tag can be conformal with a product easily, identification information directly comes from an object, safety is high, and large-scale production is facilitated.

Description

technical field [0001] The invention relates to the technical field of product labels for recording product information, in particular to a chipless terahertz label and a preparation method of the terahertz label. Background technique [0002] Product labels are the main carrier for recording product information. Based on product labeling technology, people can realize the identification of product authenticity and traceability of product quality, so as to ensure and promote the improvement of product quality and the safety of consumption. At present, the product labels that are often used in the market mainly include barcodes, magnetic stripes, two-dimensional codes, and radio frequency identification tags (RFID). Make a note. However, with the increasingly widespread application of product labels, the product labels of these technical routes have limited safety and are easy to be counterfeited, thus making it more and more obvious that producers and consumers are difficu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/077G06N3/04G06N3/08
CPCG06K19/077G06N3/08G06N3/045
Inventor 刘文权鲁叶龙张锐佘荣斌谷孟阳
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI