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Laser barcode reading device and barcode reading method

A technology of laser bar code and reading device, applied in the field of laser bar code reading, can solve the problems of cumbersome, complicated processing, poor consistency of hardware circuit and so on

Inactive Publication Date: 2010-12-15
西安富立叶微电子有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the laser scanners used in the market today use red lasers of 620nm to 700nm; and the signal acquisition methods used by traditional laser scanners require a large number of hardware circuits to amplify the signals, so that The problem of poor consistency of the hardware circuit is introduced, which makes the process of post-processing the collected signals more complicated and cumbersome

Method used

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  • Laser barcode reading device and barcode reading method
  • Laser barcode reading device and barcode reading method
  • Laser barcode reading device and barcode reading method

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Embodiment Construction

[0044] Such as figure 1 The illustrated laser bar code reading device includes a blue laser that can emit a blue laser beam with a wavelength of 405 nm to 475 nm, a deflecting mirror that deflects the optical path of the blue laser beam emitted by the blue laser 1, and The blue laser beam deflected by the deflection mirror 2 mirrors and projects the reflected beam to the barcode to be scanned for diffuse reflection and synchronously mirrors the diffuse reflection beam that reflects the information of the barcode to be scanned after being diffusely reflected by the barcode to be scanned A reflective swingable mirror 3, a light collector 4 that collects the diffusely reflected light beams specularly reflected by the swingable mirror 3 and correspondingly forms a light beam, and a filter that filters the light collected by the light collector 4 Mirror 5, a photoelectric receiver 6 that receives the light beam filtered by the filter 5 and converts the received light beam signal into...

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Abstract

The invention discloses a laser barcode reading device and a barcode reading method. The reading device comprises a blue light laser, a deflecting mirror, a swingable reflecting mirror, an optical collector, a light filter, a photoelectric receiver, an amplification processing circuit, a processor connected with the amplification processing circuit and controlling the blue light laser, and a power module. The reading method comprises the following steps of: receiving scanning optical signals; performing analog digital conversion and acquisition of the scanning optical signals; performing fast Fourier transform; removing high-frequency component; performing fourier inversion; calculating a threshold by using an Otsu method; performing binaryzation on barcode signals according to the threshold; and decoding according to various barcode standards. The laser barcode reading device has the advantages of reasonable design, simple and convenient operation, low input cost and good using effect and adopts the brand-new blue laser scanning source to scan one-dimensional barcodes; and the invention also provides a barcode reading method with high recognition performance, strong resolution and high recognition precision so as to simplify an electronic hardware part of the barcode reading device.

Description

Technical field [0001] The invention belongs to the technical field of laser bar code reading, and particularly relates to a laser bar code reading device and a bar code reading method. Background technique [0002] With the rise of the logistics industry, barcodes are increasingly used in efficient logistics and retail industries, and one-dimensional barcodes have been widely used. Correspondingly, barcode reading devices have also entered a stage of rapid development, in which the development of laser scanning devices is also changing with each passing day. The working principle of laser scanning devices is to use lasers as light sources and information carriers, and to scan one-dimensional barcodes accordingly. operation. However, the laser scanners used in the market today use red lasers ranging from 620nm to 700nm; and the signal acquisition methods used by traditional laser scanners require a large number of hardware circuits to amplify the signal. The introduction of the...

Claims

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Application Information

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IPC IPC(8): G06K7/10
Inventor 吴新胜
Owner 西安富立叶微电子有限责任公司
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