Download presentation
Presentation is loading. Please wait.
1
Automatic Identification (ID)
123456 Automatic Identification (ID)
2
Scanners - Wands - Imagers (CCD) - Lasers
Automatic Identification (ID) Images - Bar Codes - Stacked Codes - Matrix Codes Scanners Wands Imagers (CCD) Lasers Printers RFID Tags (9)- (78)-Getting Started With Bar Codes: A Systematic Guide by Bushnell/Meyers (78)-pp: 246 Magnetics OCR (Optical Character Recognition) Biometrics Memory Buttons
3
FOCUS Bar Codes Imagers - Linear - Stacked Lasers IMAGES SCANNERS
(CCD’s) Lasers
4
Bar Coding and Scanners
the Basics ….
5
Bar Coding IS NOT: a System
6
Bar Coding IS: a Modern Tool It replaces antiquated data
collection techniques like pencil and paper on an accurate and timely basis!
7
Bar Coding IS: a Language It makes it efficient for
humans and machines to easily communicate with computers! IS:
8
Bar Coding Health Warehouse and Manufacturing Distribution Retailing
Financial Government Logistics Education
9
Bar Coding To Maximize the Benefits of Using Bar Coding, Scanning Devices are Most Generally Configured to Communicate with Host Computers
10
Bar Coding Inventory Manufacturing Work-in-Process Warehouse Time and
Control Manufacturing Work-in-Process Bar Coding Warehouse Management System Time and Attendance Point of Sale Package Tracking Vehicle Maintenance Receiving
11
Point-of-Sale Operation
POS Terminal Host Computer Scanner
12
Point-of-Sale Operation
The Universal Product Code on a package is scanned. Decoded data (Product ID) is sent to a POS terminal. Scanner
13
Point-of-Sale Operation
POS Terminal Product ID is sent to host computer.
14
Point-of-Sale Operation
Product ID is "looked up" in memory. 2. Inventory quantity is decremented. 3. The price and description are sent back to the POS terminal. Host Computer
15
Point-of-Sale Operation
The Price and description of the scanned item is: indicated on the POS display. printed on the sales receipt. POS Terminal
16
Warehouse Receiving Operation
1. Mobile Computer with Scanner at Receiving Dock Host Computer
17
Warehouse Receiving Operation
1. Mobile Computer with Scanner at Receiving Dock 1. Bar Code on a package is scanned. Decoded data (Package ID) is sent to host computer.
18
Warehouse Receiving Operation
1. Package ID is "looked up" in memory. 2. Details of items received are added to inventory file. Put away instructions are sent back to mobile computer. Host Computer
19
Warehouse Receiving Operation
1. Mobile Computer with Scanner at Receiving Dock 1. Put away instructions are indicated on the display of the mobile computer.
20
(Symbologies or Languages)
Images (Symbologies or Languages) More than 200 are Available!
21
FOCUS Bar Codes - Linear - Stacked
22
UNIVERSAL PRODUCT CODE
Linear Numeric UNIVERSAL PRODUCT CODE ….. A Retail Symbology
23
How Does the Universal Product Code Get on a Product?
24
It is printed on the box as part of the normal production process.
25
….. An Industrial Symbology
CODE 39 Linear Alphanumeric ….. An Industrial Symbology
26
Primarily Used for License Plate Applications
Universal Product Code and Code 39 Primarily Used for License Plate Applications - Real Time Look Up at Host Computer - Off Line Data Collection
27
2-D (Stacked) PDF 417 (Portable Data File)
28
PDF 417
29
2-D (Stacked) Application
Portable Data File License Number Sex Issue Date Height Expire Date Weight Eye Color Hair Color Birthdate Class
30
2-D (Stacked) PDF 417 Other Applications - Control Machine Operations
- Patient Medical Records - Shipping Manifests - Production Records
31
How are Symbologies Scanned (or Read)?
32
FOCUS Scanners - Imagers (CCD’s) - Lasers
33
Scanner Types Imager (CCD)
34
Imager Aiming Pattern
35
Imager Collection Technique
Photo Array 640 x 480 Pixels or Light Receptors
36
(Computerworld - August 6, 2001)
Imager Output At the heart of today's digital imaging devices are charge-coupled devices (CCD). A type of semiconductor that's sensitive to light, a CCD consists of a 2-D array of individual elements, each of which is, in essence, a capacitor - a device that stores an electrical charge. (Computerworld - August 6, 2001)
37
Scanner Types Laser
38
Scanners Most Prevalent Wide Variety ( ~ 5.4 Million Units ))
39
Symbol Technologies Hand-held
40
Symbol Technologies Hands-free
41
Symbol Technologies Mobile Computers
with Integrated/Tethered Scanners
42
Symbol Technologies Scan Engines
43
they ALL work the same way!
How Do Laser Scanners Work? Essentially………… they ALL work the same way!
44
Laser Scanners They Generate a Radiation Beam.
(16)- (45)-Bravman VOL 1: 80/10-20 (45)-Bravman VOL 3: 54/16-22
45
What Kind of Beam? = Light = Amplification by = Stimulated
R = Light = Amplification by = Stimulated = Emission of = Radiation
46
Scanning (Linear) What the Eye Sees
47
Scanning (Raster) What the Eye Sees
48
Scanning (Omni-directional)
What the Eye Sees
49
Scanners Rotating or oscillating mirror deflects a laser beam.
50
Scanning What the Scanner Does
51
Scanning A Portion of the Light is Reflected from Light Spaces
A Portion of the Light is Absorbed by Dark Bars
52
Scanning Universal Product Code Four Dark Bar and Light Space Widths
3X 1X 4X 2X Four Dark Bar and Light Space Widths
53
Two Dark Bar and Light Space Widths
Scanning Code 39 Narrow 3X 1X 2X Wide (Range of 2x to 3x) Two Dark Bar and Light Space Widths
54
An Analog Signal is Generated
Scanner Decoding Reflected Light Absorbed Light An Analog Signal is Generated
55
Scanner Decoding Analog to Digital: HOW? Analog Signal Digital
Bar Pattern Analog to Digital: HOW?
56
One of many decoding methods (algorithms):
Decoding: Analog to Digital Signals One of many decoding methods (algorithms): 112 Clock Counts 110 48 40 42 38 41 114 50 52 Total clock counts = 689; divided by 11 (bars/spaces) = 62.64 All elements above are WIDE; All elements below are NARROW W N Therefore:
57
Other Important Scanning Issues
1. Scanner Resolution and Symbol Density 2. Depth of Field and Width of View 3. Scanner Angle 4. Quiet Zones
58
Mil Size Relates to Density
6.5 7.0 10.5 13.7 20.5 30.4 40.2 40.2
59
Scanner Resolution Symbol Density Scanner Resolution (spot size) and
Should Approximate Smallest Bar or Space
60
Excellent Analog Signal
Scanner Resolution and Symbol Density Excellent Analog Signal
61
Too Big: Distorted Analog Signal
Scanner Resolution and Symbol Density Too Big: Distorted Analog Signal
62
Too Small: Distorted Analog Signal
Scanner Resolution and Symbol Density Too Small: Distorted Analog Signal Void Spot
63
Scanning Depth of Field Width of Field
Both Parameters Will Vary Depending Upon Scanner Resolution and Size of the Smallest Symbol Element.
64
Scanner Angle (x) ° max ± 2 ° (dead zone) Scan Beam
65
Quiet Zones Yes No
66
SUMMARY 1. Narrow Element Size 2. Distance from the Scanner
The relationship between the scanner and the symbol being scanned is affected by the: 1. Narrow Element Size 2. Distance from the Scanner 3. Scanner Angle 4. Quiet Zones
67
Interpret a Bar Code Symbol?
What Major Components of a Scanner are Used to Interpret a Bar Code Symbol?
68
Laser Scanner Major Components * Laser Diode (Light Source)
* Mirror or Mirrors (Scan Mechanism) * Photo Diode (Light Collector) * Amplification & Filtration (Analog Signal) * Digitizer * Decoder * Microprocessor
69
Laser Scanner Processing Steps Host Emitted Light Reflected Light
Transmit Result Laser Diode Mirror (s) Emitted Light Reflected Light Photo Diode Mirror Analog Signal Digital Bar Pattern Analyzes Digital Signal Determines Symbology (Decodes) Code 39, UPC, etc. , and Resulting Data
70
Symbol Technologies LS4004i
71
Symbol Technologies LS4004i
Light Source Photodiode Emitting and Collecting Mirror
72
Symbol Technologies LS4004i
Mirror Light Source
73
Symbol Technologies LS4004i
Emitting Mirror Collection Mirror
74
Symbol Technologies LS9100
75
Symbol Technologies LS9100
Emitting and Collection Mirror Emitting Mirror Emitting Mirror Photodiode Light Source
76
Symbol Technologies LS9100
Emitting Mirror Collection Mirror
77
Symbol Technologies LS9100
Mirrors Light Source
78
Symbol Technologies LS9100
Omni-directional Pattern 5 Sided Mirror 4 Sided Rotating Mirror
79
User Programmable Options:
- Audio Response (on/off/frequency/volume) - Power Mode Bi-directional Redundancy (forward and reverse) - Check Digit Validation - Autodiscrimination (enable/disable symbologies) - Data Length Control (fixed, range or none) - Laser On Time
80
What Happens to the Data that has been Interpreted and
Forwarded to a Host as a Result of Scanning a Bar Code Image?
81
Bar Coding Inventory Manufacturing Work-in-Process Warehouse Time and
Control Manufacturing Work-in-Process Bar Coding Warehouse Management System Time and Attendance Point of Sale Package Tracking Vehicle Maintenance Receiving
82
Summary In the majority of all applications, automatic identification techniques have no value by themselves. There must be a scanner to interpret encoded characters and a computerized system to collect, store and process these data that have been interpreted. Only then can beneficial activities occur.
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.