Más contenido relacionado




Bar codes and its type with different scanner and its application

  1. Pushkar Sadhukha (265) Saurabh Upadhyay (282) BAR-CODES Akshay Shelake (271) Nikhil Poojary (258)
  2. AGENDA • History of Bar Codes • Why use barcodes? • Bar Code Technology • Bar Code Terminology • Barcode types and use • Bar Code Scanners & its types • Uses • Benefits of Barcoding • Applications
  3. HISTORY OF BAR CODES • The first patent for a bar code type product (US Patent #2,612,994) was issued to inventors Joseph Woodland and Bernard Silver on October 7, 1952. The Woodland and Silver bar code can be described as a "bull's eye" symbol, made up of a series of concentric circles. • A local food chain store owner had made an inquiry to the Drexel Institute asking about research into a method of automatically reading product information during checkout. • In 1948, Bernard Silver , a graduate student at Drexel Institute of Technology in Philadelphia joined together with fellow graduate student Norman Joseph Woodland to work on a solution. • Woodland's first idea was to use ultraviolet light sensitive ink. The team built a working prototype but decided that the system was too unstable and expensive so they went back to the drawing board. • On October 20, 1949, Woodland and Silver filed their patent application for the "Classifying Apparatus and Method", describing their invention as "article classification...through the medium of identifying patterns". The first patent for a bar code type product (US Patent #2,612,994) USPTO
  4. WHY USE BARCODES? • As far back as the 1960s, barcodes were used in industrial work environments. Some of the early implementations of barcodes included the ability identify rail road cars. • In the early 1970s, common barcodes started appearing on grocery shelves. To automate the process of identifying grocery items, UPC barcodes were placed on products. • Today, barcodes are just about everywhere and are used for identification in almost all types of business.
  5. CONTINUED…. • When barcodes are used in the business process, procedures are automated to increase productivity and reduce human error. • Whenever there is a need to accurately identify or track something, bar-coding should be used. • Instead of manually typing a customer identification number into a database, if the information is contained in a barcode, a data entry operator may scan it in & this would increase automation and reduce human error.
  6. BAR CODE TECHNOLOGY It is an automatic identification technology Bar code is a predefined format of dark bars and white spaces It contain a specific information It allows real-time data to be collected accurately and rapidly Combination of barcode technology with computer and application software improves performance, And productivity
  7. BAR CODE TERMINOLOGY BAR - The darker, non reflective element of a Bar Code BI-DIRECTIONAL SYMBOL - A Bar Code symbol format which permits reading in either direction across the bars and spaces CHECK DIGIT - A calculated character included within the Bar Code for error detection FIXED BEAM SCANNER - A stationary Bar Code Scanner. The symbol must be moved through the light beam to be read
  8. • SPACE o The lighter, reflective element of a Bar Code • START CHARACTER o A special pattern of bars and spaces used to identify the beginning of a Bar Code symbol • STOP CHARACTER o A special pattern of bars and spaces used to identify the end of a Bar Code symbol
  9. BARCODE TYPES AND USE There are two types of barcodes: Linear barcodes and 2D barcodes. Linear barcodes 2D barcodes Code 128 Data Matrix UPC PDF417 Interleaved 2 of 5 Maxicode
  10. Some established barcode industry standards include: Established Standard Common Use Symbology AIAG Automotive item identification Data Matrix UPCA, EAN13 Items for sale worldwide UPC/EAN MIL-STD-130L US Department of defense Data Matrix SSCC-18 Shipping cartons Code 128
  11. Linear barcodes UPC-A: - Universal product code seen on almost all retail products in the USA and Canada EAN-13: -European Article Numbering international retail product code. It is used world-wide where the country code is required for marking retail items . This code is composed of 2 numbers for country code,10 numbers for data characters and one for checksum. Coda bar: - Older code often used in library systems, sometimes in blood banks Code 128: Very capable code, excellent density, high reliability; in very wide use world-wide Code 39: General-purpose code in very wide use world-wide
  12. 2-DIMENSIONAL BARCODES • PDF417: Excellent for encoding large amounts of data • DataMatrix: Can hold large amounts of data, especially suited for making very small codes • Maxicode: Fixed length, used by United Parcel Service for automated package sorting
  13. ALGORITHM TO CALCULATE THE CHECK DIGIT • Calculated with the first 12 digits • They are given from left to right the weights 1 and 3, alternatively. • Then we sum them all, we take the rest of the division by 10, and the check digit is the complement to 10 to this rest. • Example for the code 7 6 1 2 3 4 5 6 7 8 9 1 • 7x1 + 6x3 + 1x1 + 2x3 + 3x1 + 4x3 + 5x1 + 6x3 + 7x1 + 8x3 + 9x1 + 1x3 =113 113/10=10*11+3 3+7=10 The check digit is 7
  14. BAR CODE SCANNERS • A device used to extract information optically from a Bar Code • Bar Code symbol consists of series of vertical dark bars separated by spaces • When illuminated reflected light is detected by electro optical sensor • The intensity of reflected light from the dark bars is less than that of spaces
  16. TYPES OF SCANNERS • There are three basic types of bar code scanning devices: • Contacts Wands (Readers) • Active Non-Contact Readers • Passive Non-contacts Readers
  17. CONTACT READERS Must touch or come in close proximity of symbol Good where the label cannot be placed in an easy-to-view position Normally hand-held/stationary units Common type is pen/wand reader Positioned angle of wand to the surface and movement speed across the symbol are key parameters
  18. NON-CONTACT READERS • Reader need not come in contact with symbol • Scan distance may be from 6” to several feet depending upon symbol size and scanner design • Hand-held, fixed beam readers
  19. NON-CONTACT READERS Active Non-Contact Readers Passive Non-contacts Readers • Use of helium-neon gas lasers as a light source • Use a light source and a single photo detector • Light is coherent (single frequency) • Operates like a video camera • Can detect the orientation of the symbol (using figure-eight or stbtarus) • The image of the bar code is focused on to an array of photo detectors, usually a charge coupled device (CCD)
  21. USES OF BAR CODES Bar codes can be used in every business around the world to track assets in any building including every desk, computer, telephone, copier and desk accessory. to track mail from the time it arrives in the mail room to the time it is delivered to each desk or location within an office. to help security guards identify every employee, every door they enter and every room they work in. to secure, lock or unlock entrances or exits throughout the plant. to manage and track your vehicle fleet and each driver
  23. • SHIPPING • ELECTRONIC DATA INTERCHANGE (EDI) APPLICATIONS • Direct communication between computers of two companies (Manufacturer & Vendor) • Industry-wide EDI standards • Reduces cost and saves time of business transaction • RETAIL APPLICATIONS • • • • Super markets Counter-mounted Bar Code scanners Universal Product Code (UPC) Price and description information • WARE HOUSING • HEALTH CARE APPLICATIONS • Drugs, devices, instruments • Identification of expiry date • Blood banking • Blood group • Expiry date • Donor traceability
  24. CONCLUSION • Barcodes are very useful and used all over the world • With the common use of mobile phone, 2D barcodes will become the most spread ones • Not only will they be used to identify products but also to communicate (SMS, MMS ,address contact also to communicate (SMS, MMS, address, contact cards)

Notas del editor

  1. For example, in a data entry work environment, workers may be required to enter an enormous amount of data into a customer database system.