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The Working Principle of Barcode Scanner

  • Author:Crystal
  • Release on:2016-09-01

Barcode inventory control mechanism is the best ever invention, the shops around the world to track products, and even may have been used to market fruits and vegetables path tracing. Using the bar code scanner is very common, so few people to pay attention to how the bar code scanner works, how smooth the scanner reads the price and the name of the product.

Common bar code scanner is normally provided by a light source, an optical lens, a scanning module, an analog-digital conversion circuit plus plastic housing. The scanner will detect the use of photovoltaic elements convert optical signals into electrical signals and then processed through an analog to digital converter to convert the digital signal to the computer. Bar code scanner light emitted from light source through the optical system is irradiated onto the bar code symbol, so that light is reflected back through the optical imaging system in the photoelectric transducer, thus producing an electrical signal, the signal after amplification circuit generates an analog voltage, and irradiating light is proportional to the bar code symbol is reflected above, is then filtered shaping the formation of the analog signal corresponding to the square signal encoder can be parsed into a computer directly receive digital signals.

Basic working procedures is through barcode scanner bar code scanner to read the data, reconverted language humans can understand. In this transformation process, all the tiny laser all work together, with the spacing of their different lengths and match the bar code, and then to the corresponding information found in the product database. Barcode scanners in these components work together on the show amazing scanning technology