A barcode reading device

Abstract

The invention relates to a barcode reading device, comprising a housing, a slot-shaped viewing window with openings at both ends, a camera module and a circuit board arranged in the housing, a hole is arranged on the front of the housing, and the slot-shaped viewing window Set in the hole; the depth value D of the slot-shaped viewfinder window 1 ≥10mm, the lens of the camera module captures the barcode image through the slot-shaped viewfinder, and then transmits it to the processor on the circuit board for decoding to obtain the barcode information. The barcode reading device of the present invention effectively blocks stray light from entering the lens through a deep slot-shaped viewing window and undulations on the side wall of the slot-shaped viewing window, thereby realizing long-distance capture of clear barcode images.

Description

technical field [0001] The invention relates to a barcode reading device, which belongs to the field of barcode identification. Background technique [0002] The barcode scanning methods of existing barcode recognition equipment are roughly divided into the following two types: 1. Active code scanning: the merchant holds a barcode scanner to scan the barcode presented by the user. The angle of the gun enables the camera to capture a clear barcode image, but this method must be manually scanned, which cannot meet the needs of unmanned scanning codes such as toll stations, parking lots, etc.; 2. Passive code scanning: the barcode recognition device is fixed Manually, the user holds the mobile terminal, closes the identification code on the mobile terminal or approaches the lens of the barcode reading device at a relatively short distance, and adjusts the barcode from multiple angles. Otherwise, the success rate of reading is low and affects the user experience. When the passi...

AI Technical Summary

Problems solved by technology

[0002]The barcode scanning methods of existing barcode recognition equipment are roughly divided into the following two types: 1. Active code scanning: the merchant holds a barcode scanner to scan the barcode presented by the user, In the process of scanning the code, it is necessary to manually hold the scanning gun and adjust the angle of the scanning gun so that the camera can capture a clear barcode image. However, this method must be manually scanned, which cannot meet the requirements of unmanned scanning in places such as toll stations and parking lots. Charge requirements; 2. Passive scanning code type: the barcode recognition device is fixed, and the user holds the mobile terminal, and the identification code on the mobile terminal is close to the lens of the barcode recognition device at a short distance, and adjusted at multiple angles Barcode, otherwise the reading success rate is low, affecting user experience

When the passive code scanning method is applied to unmanned toll collection management such as parking lots and toll stations, the following problems will arise: 1) The user must adjust the angle of the barcode multiple times, which takes a long time to scan the code and is likely to cause congestion; The barcode is close to or close to the camera at a relatively short distance

Existing fixed barcode recognition equipment (such as figure 1 As shown) it is impossible to obtain a clear and readable barcode image at a long distance. This is because the light incident on the lens of the existing fixed barcode recognition equipment is the light at any angle in front of the lens. When the application scans the code at a long distance, the incident The light contains a lot of external environmental stray light, for example, the specular light on the mobile terminal used to display the identification code, multi-angle astigmatism in natural light, and other high-brightness external lighting sources, etc. When barcodes are used, the barcode is close to or close to the lens to block a large area of ​​external environment stray light, and the interference caused is very small. The light has caused serious interference to the barcode image captured by the image sensor, so that the image noise in the captured image is too high, and the code reading equipment cannot normally read and decode the barcode, such as figure 2 as shown, figure 2 for adoption figure 1 The barcode reading device shown above scans the code at a long distance (the distance between the barcode and the reading device is 60cm) to obtain the barcode image

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