Bar Code or bar code (Barcode). It is the symbol of the Numeric data is a thick bar Some vary depending on the number of corporate governance standards are below this system is the most popular worldwide.It is a fast way and the reliability of information is high and, as a convenience for the user.
bar code contains 3 parts:
1. Lining lining which is white and black with a width of the veining of each type of standard bar code
2.The text information is a part of the meaning of the information, for lining
read, understood. 3. The last empty bar (Quiet Zone) is the part of the reader bar code bar code used to define the scope and Configuration, with white
What type of Bar Code
current standards that are much more acceptable system as follows: 2
1. system EAN (European Article Numbering) is a bar code that Thailand has used is the 13-digit number
each digit is defined as follows: 3-digit code is the first 4 digits of Thailand
next to the code factory production or subscription code number 5
next to last digit product code check digit number 12 forward that
Determine if the correct or not guilty last Bar Code,
will not read out meaningful is not
2. UPC (Universal Product Code) is a system that is used for bar code Products Retail in North America
There are 12 main code and Canada is able to tell what has been by virtue of first digit code
this is a 0 digit code is not only used in
2 means that the product has no weight, of course
3
4 message about Public Health message that food is not
5 use of the coupon and the main
12 used to check the accuracy of the barcode
the main work of the reader bar code reader bar code
(Barcode Reader) is a device that converts data from the bar code is a digital signal via the computer
The operation of the reader, using the main bar code reflects the light beam will be read by the bar code to the goods that are on
and there will be light is reflected by the reflective area on the floor light will be better than the dark
These will reflect the light back to be converted into electrical signals by Photodiode
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