Sistema de lectura de datos variables e inspección de la calidad de impresión

Bar code is a symbol that combines lines and spaces according to certain coding rules to represent certain letters, numbers and other materials. When identifying, it is scanned by a bar code reader (that is, barcode scanner is also called a bar code scanner or a bar code reader) to obtain a set of reflected light signals, which are converted into a set of electronic signals corresponding to lines and spaces after photoelectric conversion, and then decoded and reduced to corresponding alphanumeric characters, and then transmitted to the computer.