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DPM (direct part mark) two-dimensional code recognition system

A technology of two-dimensional code and pneumatic system, applied in the field of DPM two-dimensional code recognition system, which can solve the problems of large size, consumption and inconvenient portability

Active Publication Date: 2014-01-22
袁冲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with laser etching and electrochemical corrosion, this method has the characteristics of low initial cost, portability, and permanence, and can avoid the high cost, large size, inconvenient portability of laser etching, poor permanence of electrochemical corrosion, and the need to consume consumables , Only suitable for metal devices and other shortcomings
[0004] DPM two-dimensional code generation methods and the diversity of materials used lead to low contrast, multi-noise interference, complex background, and uneven illumination during the acquisition process in its two-dimensional code images. Accurate and fast identification of this type of two-dimensional code is a must a puzzle
At present, there are few DPM recognition methods suitable for complex backgrounds, low contrast, and possible deformation in academic research.

Method used

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  • DPM (direct part mark) two-dimensional code recognition system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] DPM encoding equipment

[0054] The encoding equipment is composed of computer, monitor and marking machine. Under the control of the computer, the marking machine moves in the plane through the two-dimensional workbench, and at the same time, the needle head vibrates at high frequency through the pneumatic system to print a clear DPM two-dimensional code mark on the workpiece. The marking machine equipment is mainly composed of three parts: pneumatic system, stepping motor, electronic controller and tungsten carbide needle. The electronic controller is the core component of the coding equipment, mainly used to control the up and down movement of the tungsten carbide needle. Deep and shallow dents are formed on the surface to form a DPM QR code. The function of the stepper motor is to drive the injection movement and control the direction and precision of the movement. The hardware design block diagram of the encoding device is as follows figure 1 shown.

Embodiment 2

[0056] DPM two-dimensional code automatic identification platform

[0057]DPM two-dimensional code target image acquisition and preprocessing are mainly realized by digital signal processor (DSP) and field programmable gate array (FPGA), and the master / slave mode is adopted between DSP and FPGA. Among them, the DSP mainly completes the processing of the target image and controls the start of the FPGA sampling signal. FPGA completes the sampling control process of the target image. ARM (Acorn RISC Machine) 9 or ARM11 processor is used to complete the positioning and recognition of the collected DPM two-dimensional code target image.

[0058] The target image acquisition and processing module composed of DSP and FPGA transmits the image target to be recognized to the DSP through the camera, and the DSP completes the preprocessing and distortion processing of the target image, and uniformly converts the image into a grayscale image. Then, the DSP inputs the processed target ima...

Embodiment 3

[0060] DPM two-dimensional code automatic recognition method

[0061] The method flow involved in automatic recognition of DPM barcodes can be divided into the following steps: barcode image acquisition, image preprocessing, barcode area positioning, two-dimensional code element precise positioning algorithm, barcode decoding error correction, and result display. The invention adopts the identification algorithm technology with independent intellectual property rights, can quickly locate the area of ​​the two-dimensional code, divide the internal code elements of the two-dimensional code, and make up for the defect phenomenon through the decoding error correction algorithm. Compared with traditional algorithms, it has obvious advantages in recognition rate and recognition time. image 3 is a flowchart of the automatic identification method.

[0062] (1) Image preprocessing

[0063] Image preprocessing mainly refers to the grayscale transformation of the image, and the weight...

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Abstract

The invention discloses DPM encoding equipment, an automatic two-dimensional code recognition platform, and a method for recognizing a DPM two-dimensional code. A series of links such as image acquisition, automatic recognition, error correction and decoding of the DPM two-dimensional code are realized by fusing interdisciplinary algorithms such as computer vision, pattern recognition and image processing, and disadvantages in an image, such as nonuniform illumination, low contrast, blurring, rough material and two-dimensional code stain are overcome, so that a purpose of accurately and rapidly recognizing and reading the DPM two-dimensional code is achieved.

Description

technical field [0001] The present invention relates to a two-dimensional code identification method and device, in particular to an identification system for a DPM two-dimensional code of the Industrial Internet of Things. Background technique [0002] With the rapid development of two-dimensional code technology and the continuous expansion of application scope, the continuous deepening of research on two-dimensional code automatic identification technology, the construction of an industrial DPM (Direct Part Mark) two-dimensional code automatic identification system and its industrialization requirements growing stronger. [0003] Traditional two-dimensional barcodes are basically implemented by printing methods. In view of the disadvantages of printed paper products that are easy to wear, become blurred and unreadable, easy to lose, do not support full life cycle traceability, and have no redundancy. The DPM two-dimensional code is realized by industrial methods such as ...

Claims

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Application Information

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IPC IPC(8): G06K7/10
Inventor 高韬
Owner 袁冲
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