What Are The Bar Code Readers

The barcode readers are electronic devices that can read the information in a bar code and transmit the POS terminal or computer. The barcode readers are present in all areas of society, since bar codes are massively deployed in the industry, companies or institutions, in tasks such as inventory control, billing, attendance and access control, control of quality or process control.

Features

The bar code readers basically consist of three components:

Scanner reads bar code symbols. Decode: scans the bar code read and converts the information into a format appropriate data. Communications Interface: enables connection between the reader and the computer. Generally, bar code readers transmit real-time data to the computer containing the database, but sometimes the reader itself stores information in memory.

Some barcode readers incorporate an LCD screen that displays the information corresponding to the reading, very useful in applications of inventory or supplies.

The main advantages of bar codes are:

Speed ​​of data capture. Elimination of typing errors. Ease of use. Low cost of implementation. Connection

Let's see how to connect bar code reader to your computer:

Bar Code Readers with cable: USB, RS-232 serial port or keyboard port PS / 2. Barcode readers wireless: the reader connects via Wi-Fi or Bluetooth communication with the base and load. Mode of operation

The barcode reader has three modes:

Manual: with pencil or pistol. Fixed: are fixed to the wall or counter. Semi-fixed: provide support and support both manual and fixed use. Reading Technology

Several technologies are reading the bar code readers:

Stylus: the end has a light source and a photodiode. By moving the stylus across the bar code the photodiode measures the intensity of the reflected light and capture the information. Laser: function as the stylus, except that the light source is a laser, either a single line (one-way, needs to direct the code) or more (omni, just submit the code). CCD (Charge Coupled Device): capture the code through a series of hundreds of tiny light sensors lined up in rows. Camera: use a camera and image processing techniques to decode the barcode. CCD cameras are usually the sensors arranged in an array of two dimensiones.Los cell phones may work as bar code readers, thanks to the built-in camera, having developed 2D barcode optimized for mobile phones, such as QR codes.

Source: Bar Code Readers