Omnidirectional multiple line laser bar code reading device and method thereof

Abstract

The invention discloses an onidirectional multiple line laser bar code reading device and a method thereof. The apparatus comprises a processor, a DAC (digital to analog converter) output circuit, a motor control circuit, a laser, a motor, a laser rotation mechanism, a laser receiver, a front end signal conditioning circuit, a width sampling circuit and a decoding circuit. The processor is connected with the DAC output circuit, the motor control circuit, the decoding circuit and a communication circuit respectively. The DAC output circuit is connected with the laser. The motor control circuit is connected with the motor. The motor drives the laser rotation mechanism to rotate. The laser receiver, the front end signal conditioning circuit, the width sampling circuit and the decoding circuit are successively connected with each other. The method is characterized by: if bar code information is incomplete, reading the bar code information obtained by another scanning line; and then integrating and recombining the back and forth two groups of the information so as to obtain a complete bar code scanning result. Aiming at wrinkling, damage and the reflective barcode, by using the device and the method of the invention, rapid decoding can be realized; a user can feel smooth barcode reading; working efficiency can be increased.

Description

Technical field [0001] The invention relates to the research field of laser bar code recognition, in particular to an omnidirectional multi-line laser bar code reading device and method. Background technique [0002] A barcode reader is a device used to read the information contained in a barcode. It has accurate identification, fast data input speed, simple equipment and low cost, and has been more and more widely used in many occasions such as supermarkets, libraries, and warehouses. According to different light sources, barcode readers can be divided into rainbow barcode readers (also called CCD scanners) and laser barcode readers. Rainbow Barcode Reader uses the principle of photoelectric coupling (CCD) to image the barcode printing pattern and then decode it. Its advantages are: no shaft, motor, long service life; low price. The laser barcode reader is a single-line scanner that uses a laser diode as the light source, but its scanning speed, scanning distance, scanning se...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: (1) Although this method reduces the hardware structure and uses more software algorithms for reading, it also causes slow recognition speed and cannot be decoded quickly.

(2) This method still uses vibrating mirror, and the scanning speed is low, so it is not suitable for occasions that require fast scanning

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