CN211604128U - Improve bar code scanning equipment of high reflection of light bar code recognition rate - Google Patents

Abstract

The utility model provides a bar code scanning device for improving the high-reflection bar code recognition rate, which comprises a shell, a lighting plate, a camera, a first polarizing film and a second polarizing film, wherein the scanning window end of the shell is provided with a window, and the lighting lamp and the camera are arranged inside the shell; the lighting panel is provided with a plurality of LEDs, the first polaroid is arranged between the window and the lighting panel, and the second polaroid is arranged between the lighting panel and the camera; and the polarization direction of the first polarizer is vertical to that of the second polarizer. The utility model discloses a bar code scanning equipment, add the polaroid respectively on peripheral round light and middle camera, direction between them becomes 90 degrees, utilize first polaroid to make the light that the light sent form the linear polarization, the linear polarization shines and forms the reverberation behind the high reflection of light object surface that has the bar code, recycle second polaroid filters most reflected light, it is used for the formation of image to remain the light unanimous with the camera polaroid, form the facula when can showing the reduction formation of image, show the identification rate that improves the bar code.

Description

Improve bar code scanning equipment of high reflection of light bar code recognition rate

Technical Field

The utility model relates to a bar code scanning equipment technical field especially relates to a can improve bar code scanning equipment of high anti-light bar code recognition rate.

Background

With the rapid development of big data and internet of things industries, a bar code is generally applied in many fields as an information carrier which can be conveniently and rapidly read, and then a bar code scanner is also applied in a large scale as a very convenient data information acquisition device, which utilizes an optical principle to decode the content of the bar code and then transmit the content to a computer or other devices in a data line or wireless mode, and is widely applied to bar codes for scanning goods and documents in supermarkets, logistics express delivery, libraries and the like. The bar code scanner has various product forms, and has special industrial bar code scanning equipment, movable bar code scanning equipment formed by combining a bar code scanning module with a PDA and the like.

In the application process of the bar code, the most common application is to print or display the bar code on a carrier, such as paper, a mobile phone screen or a computer screen, in order to facilitate the identification of the bar code, the bar code and the carrier often have obvious color difference (color difference), for example, the bar code and the carrier are generally in the form of a black bar code + a white carrier; however, as the specific application field of barcodes is expanded, the carrier format of barcodes is changed, for example, in the industries of automobile manufacturing and the like, in order to track key parts, bar codes (generally called DPM, Direct Part Marking, Direct Part identification) are directly printed on the surfaces of metal parts, such as stainless steel and aluminum alloy parts, and are directly printed on the surfaces of products, the material of these products is itself a highly reflective type of material, whereas in bar code scanning devices, in order to adapt to the successful decoding of the bar code under different environments, a light supplement lamp is often required to be configured in the bar code scanning device, when a bar code scanner reads a highly reflective bar code, a common light supplement lamp is used for supplementing light, so that a bright light spot appears on a sensor of a camera, and the recognition success rate and the reading efficiency of the bar code are influenced.

Disclosure of Invention

The utility model aims at solving the defects existing in the prior art and providing a bar code scanning device for improving the high-reflection bar code recognition rate.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a bar code scanning device for improving the high-reflection bar code recognition rate comprises a shell, a lighting plate, a camera, a first polarizing film and a second polarizing film, wherein a window is arranged at the end of a scanning window of the shell, and the lighting lamp and the camera are arranged inside the shell; the lighting panel is provided with a plurality of LEDs, the first polaroid is arranged between the window and the lighting panel, and the second polaroid is arranged between the lighting panel and the camera; and the polarization direction of the first polarizer is vertical to that of the second polarizer.

Preferably, the first polaroid is fixedly connected with the inner side surface of the window; the second polaroid is fixedly connected with the camera.

Still preferably, the edge of the first polarizer is fixedly connected to the inner wall of the housing, and the edge of the second polarizer is fixedly connected to the inner wall of the housing.

Preferably, the housing is a rectangular housing, the illumination LEDs of the illumination panel are arranged along the inner wall of the housing in a circle, and the camera is arranged at the center of the inner side of the illumination panel.

Compared with the prior art, the beneficial effects of the utility model are that: the bar code scanning device is characterized in that polarizing films are added on a circle of peripheral illuminating lamps and a middle camera respectively, the directions of the illuminating lamps and the middle camera are 90 degrees, light emitted by the illuminating lamps forms linearly polarized light by utilizing the first polarizing films, reflected light is formed after the linearly polarized light irradiates the surface of a high-reflection object with a bar code, most reflected light is filtered by utilizing the second polarizing films, light consistent with the polarizing films of the cameras is reserved for imaging, light spots can be formed when imaging is remarkably reduced, and the recognition rate of the bar code can be remarkably improved.

Drawings

Fig. 1 is a schematic view of a partial cross-sectional structure of a barcode scanning device for improving the recognition rate of high-reflective barcodes in embodiment 1 of the present invention;

fig. 2 is an illustration of an explosion structure of a barcode scanning device for improving the recognition rate of high-reflective barcodes according to embodiment 1 of the present invention.

In the figure, 1-shell, 2-lighting lamp, 3-camera, 4-window, 5-first polaroid and 6-second polaroid.

Detailed Description

In order to further understand the objects, structures, features and functions of the present invention, the following embodiments are described in detail.

Please refer to fig. 1 and fig. 2 in combination, which are schematic structural views of a barcode scanning device for improving a high-reflective barcode recognition rate according to embodiment 1 of the present invention, the barcode scanning device for improving a barcode recognition rate includes a housing 1, a lighting panel 2, a camera 3 (lens), a first polarizer 5 and a second polarizer 6, a window 4 is disposed at a scanning window end of the housing 1, the lighting lamp 2 and the camera 3 are disposed inside the housing 1, the camera 3 is used for collecting barcode images, and the lighting panel 2 is provided with a plurality of LEDs for providing illumination light during barcode scanning; the first polaroid 5 is arranged between the window 4 and the lighting plate 2, and the second polaroid 6 is arranged between the lighting plate 2 and the camera 3; and the polarization direction of the first polarizer 5 is perpendicular to the polarization direction of the second polarizer 6.

The first polaroid 5 in the bar code scanning device of the utility model plays the role of a polarizer, the light emitted by the lighting LED lamp on the lighting plate 2 forms linearly polarized light with a certain direction (consistent with the polarization direction of the first polaroid 5) after passing through the first polaroid 5, the linearly polarized light forms mirror reflection and diffuse reflection after passing through the window 4 and irradiating on the surface of a highly reflective object with a bar code, the polarization direction of the mirror reflection light is the same as that of the first polaroid 5, the polarization direction of the diffuse reflection light is changed, because the polarization direction of the second polaroid 6 is mutually vertical to that of the first polaroid 5, most of the mirror reflection light can be filtered by the second polaroid 6, the diffuse reflection light consistent with that of the second polaroid 6 is reserved, the reserved diffuse reflection light enters the camera 3 after passing through the second polaroid 6, the bar code information can be conveniently and clearly collected, the formation of light spots is avoided, and the code reading identification rate is improved.

Further, the first polaroid 5 is fixedly connected with the inner side surface of the window 4; the second polaroid 6 is fixedly connected with the camera 3; the edge of the first polaroid 5 is fixedly connected with the inner wall of the shell 1, and the edge of the second polaroid 6 is fixedly connected with the inner wall of the shell 1. The utility model discloses in the bar code scanning equipment of embodiment 1, shell 1 is square casing, and the illumination LED of illumination board 2 sets up along shell 1's inner wall round, and inboard central authorities of illumination board 2 are located to camera 3, but the utility model discloses not so as to limit.

The utility model discloses in, window 4 is transparent inferior gram force panel, and the luminousness is high, can complete printing opacity, and is very little to the influence of light.

To sum up, the utility model provides an improve bar code scanning equipment of high reflection of light bar code recognition rate, add the polaroid on peripheral round light and middle camera respectively, the direction of both becomes 90 degrees, utilize first polaroid to make the light that the light sent form the linear polarization, the linear polarization shines behind the high reflection of light object surface that has the bar code, form the reverberation, reuse second polaroid filters most reflected light, keep the light consistent with the camera polaroid for the formation of image, can show and reduce the formation facula when forming images; the utility model discloses be applied to the bar code recognition system of high reflection of light type, can show the recognition rate that improves the bar code.

The present invention has been described in relation to the above embodiments, which are only examples for implementing the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, all changes and modifications which do not depart from the spirit and scope of the present invention are deemed to fall within the scope of the present invention.

Claims (4)

1. A bar code scanning device for improving the recognition rate of high-reflection bar codes is characterized by comprising a shell, a lighting plate, a camera, a first polarizing film and a second polarizing film, wherein a window is arranged at the end of a scanning window of the shell, and the lighting lamp and the camera are arranged inside the shell; the lighting panel is provided with a plurality of LEDs, the first polaroid is arranged between the window and the lighting panel, and the second polaroid is arranged between the lighting panel and the camera; and the polarization direction of the first polarizer is vertical to that of the second polarizer.

2. The apparatus of claim 1, wherein the first polarizer is fixedly attached to an inner surface of the window; the second polaroid is fixedly connected with the camera.

3. The apparatus of claim 1 or 2, wherein the first polarizer is fixedly attached at its edge to the inner wall of the housing, and the second polarizer is fixedly attached at its edge to the inner wall of the housing.

4. The apparatus of claim 1, wherein the housing is a rectangular case, the illumination LEDs of the illumination plate are arranged along a circle of an inner wall of the housing, and the camera is arranged at a central position inside the illumination plate.

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