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We need to start with the coding principle of bar code.
Barcode encodes and converts a string of characters (a combination of numbers and letters, such as B2009A).
Become a strip+virtual image;
The bar code label printed by the bar code printer is the process of transforming the character string into the image (bar code in the label);
The image corresponds to the code of the character string and can be recognized and decoded by the optical device.
These optical devices are the core components of ordinary scanning guns or collectors.
For example, a scanning gun adds an empty image through its internal optical identification bar, and then decodes the character string.
Then output to the computer port (USB or serial port), and the application can go to the port to read the string corresponding to the barcode.
Then do application logic processing (such as querying the price and manufacturer of the clothing style corresponding to the barcode, etc.). ).
Barcodes can represent characters, numbers, symbols and other information; There are about twenty common ones, such as EAN- 13, Code39, UPC-A, etc.
Barcodes on the barcode labels are printed by the barcode label printer, and each barcode corresponds to a group of barcode numbers.
Different codes and numbers print different bar code graphics.
Bar code recognition machine (such as bar code scanner, collector, etc.). ) decoding by recognizing the bar code pattern;
The numbers below the bar code graphics are printed to see the numerical values represented by the bar code, which are mainly read by human eyes;
The number recognition machine in barcode mode is not concerned.
In short, the general process is:
Bar code number-> Printer printing-> Bar code graphic label->; Stick it on an object-> Scanner barcode graphics->; Scanner identification and decoding->; Get the barcode number-> System application processing ...
The commodity code is an external public bar code. You can apply to the National Commodity Coding Center for a universal commodity bar code, using EAN- 13. There are fixed rules on how to code.
If it is for internal use, you can also use the internal barcode, that is, you can edit it according to your own use. If it is unique, you can use product number+production date+serial number. If it is batch management, you can use product number+production batch ... and then use barcode printing software+barcode printer to make it!
Method and application of bar code coding;
1 Don't think too abstruse and omnipotent about bar codes. Bar codes are just a set of strings.
Whether it is meaningful, what it means and what it represents are all designed by users themselves.
It is similar to an ID number, except that this barcode can be graphical and can be scanned without manual input.
Barcodes can be divided into commodity codes and internal codes.
Commodity code: EAN 13 code, managed by national coding center.
Used to indicate the product and model of a specific manufacturer,
Generally, it consists of manufacturer, product code, price and other information.
Commodity codes can be scanned and identified in major shopping malls because they are managed by coding centers.
Internal code: it is a bar code that enterprises can freely design according to their own needs.
There is no uniform regulation, which can be used in employee ID, equipment ID, product ID, product packaging ID, raw material batch number, etc.
You can make it up as you like anyway.
You may ask, how to identify information?
Barcodes themselves can contain necessary information, just like commodity codes.
It can also be any unique number (such as date+serial number).
Then, when the barcode is published, the complete information corresponding to the ID is stored in the background database.
In this way, when the system scans the bar code, it can go to the database to find out its corresponding information and make it meaningful!
3 unit code, batch code and category code
A, the barcode can be unique, for example, give each commodity a unique barcode, which is the item code at this time, and the quantity is1;
B, the barcode can also represent a batch of goods, such as a batch of raw materials, which is the batch code, and the quantity can be greater than1;
C. Barcodes can also represent a commodity, such as issuing corresponding barcodes for products of different brands, models and specifications.
You need to enter the quantity after scanning the barcode;
Barcode is a number, and its significance lies in how you design and use it. I don't know, do you understand?
Production barcode:
1 You can order from the barcode label manufacturer and tell you the style requirements and quantity. (contact LENX)
Buy your own barcode printer+barcode printing software for printing, such as CodeSoft and LabelMatrix.
(Of course, if there are some special requirements for issuing bar codes, you can find a bar code printing software company. )
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From: Guangzhou traceability-internet of things, enterprise mobile application, traceability and warehouse, barcode and RFID software.