1, automatic reading recognition. As long as the label of the bar code is scanned with a scanning reader, the computer can automatically read and identify, determine the code of the goods, then find the price, do accumulation and so on. , summary settlement, output the total amount. It is fast and accurate.

2. Being able to classify, summarize and analyze commodity sales information is conducive to the smooth operation and management activities.

3. Sales information can be fed back to the production unit in time through the computer network, thus reducing the time-space difference of information transmission between production, supply and sales.

Extended data:

principle

The color of an object is determined by the type of light it reflects. White objects can reflect various wavelengths of visible light, while black objects absorb various wavelengths of visible light. Therefore, when the light emitted by the light source of the barcode scanner is reflected on the barcode, the reflected light shines on the photoelectric converter inside the barcode scanner, and the photoelectric converter converts it into corresponding electrical signals according to the reflected light signals with different intensities.

According to different principles, scanners can be divided into four types: light pen, red CCD, laser and image. The electrical signal is output to the amplification circuit of the barcode scanner to enhance the signal, and then sent to the shaping circuit to convert the analog signal into a digital signal. The widths of white bars and black bars are different, and the duration of corresponding electrical signals is also different.

The main function is to prevent the width of the dead zone from being insufficient. Then the decoder judges the number of bars and spaces by measuring the number of pulse digital electrical signals 0, 1. The width of bars and spaces is determined by measuring the duration of 0, 1 signal.

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