Intelligent Vending Machine

1
Intelligent Vending Machine
Team VENDetta

• Jeffrey Hepworth
• Erik Mauer
• Brendan Murphy
• David Rodriguez

2
Project Overview

• Retrofit existing vending machines with
• New interactive features
• Energy saving technology
• Globally accessible inventory control system
• Extremely Modular Upgrading System
• Allows for customizable module additions
  depending on owner needs

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Upgrades/Modifications

• User interface replaced with LCD touch screen
  display
• Upgrade to electronic payment technology
• Upgrade to high-efficiency lighting
• Conserves energy by hibernating when there is no
  human interaction
• Wired/wireless host interface

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System Diagram
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CPU/FPGA

• Altera Cyclone II FPGA
• Handles
• LCD Touch Screen Driving
• Motor Driving
• Vending State Machine
• NIOS II soft-core processor
• Handles
• Payments
• Host Communication
• Sensors
• LCD Graphics Processing
• Replace existing control board
• Emulates current vending machine functions
• Implements new upgraded features

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LCD Touch Screen

• High resolution Touch Panel LCD
• 800x480 _at_ 8bit per color
• Displays user interface and information
• Dynamic Menu Selection
• Replaces keypad
• Electronic Payment interface
• Authorized Payment

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Cash Interface

• Utilize existing bill and coin acceptors
• Multi-Drop Bus (MDB)
• Standard for coin/bill acceptor communications
• Proprietary current-controlled signal
• Not trivial to convert MDB to any standardized
  protocol
• MDB2PC board
• Hardware/Software interface
• for MDB to RS232 conversion
• Allows controller board to
• communicate with coin/bill acceptor and process
• payments/payouts
• Board donated by Upstate Networks

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Electronic Payment Upgrades

• Magnetic card reader and RFID
• Credit/Debit cards
• Buff OneCards
• Identifications cards
• Reloadable charge card
• Allows for loading credits on any card with a
  magnetic stripe or RFID.
• Interface with control board via RS232 for
  processing

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Sensors

• VeriVend System
• Optical sensor detects if item has dropped
• Motion Sensor
• Detects human presence, and brings the system out
  of hibernation
• Temperature
• Monitor temperature of Soft Drinks/Snacks
• Alerts host of temperature issues
• Tilt/Shock Sensor
• Detect if someone tilts machine
• Set off alarm
• Alerts host of attempted mischief

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Motor Control

• Utilize existing motors
• Modify hardware to drive motors
• Motors are wired in a matrix configuration
• Motor high and motor low signals are multiplexed
  to rows and columns to select a single motor
• Motor Driving
• 24V _at_ 500mA (including in-rush current)
• Motors run one at a time
• Operates at infrequent intervals, so
• power dissipation is not a problem

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Energy-Saving Features

• Currently uses Fluorescent Lighting
• Replace with LEDs
• Hibernation mode
• Goes into hibernation mode with no human
  interaction
• LED lighting and LCD will turn off
• Light-sensing control
• If not in hibernation, lighting adjusts with
  light intensity

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Host Interface

• Uses a wired or wireless connection
• Wired
• RS232, Ethernet
• Wireless
• Zigbee, Bluetooth, or WiFi
• Features
• GUI on a Windows Host PC
• Inventory Control
• Pricing
• Sales/Profit
• Service Mode

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Power

• MDB to RS232 board (MDB2PC)
• 24-36V _at_ 6A
• Drives coin/bill acceptors
• Motors
• 24V _at_500mA
• Altera FPGA board
• 9V _at_ 1.3A
• Sensors/LEDs
• Undermined

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Testing and Safety

• A unit test will be designed and run for each
  module/block at every stage of implementation,
  debugging as needed
• A module-interfacing test will be run as each
  module is added to the total system
• PCB testing/debugging will be done with each
  revision
• Safety
• Utilizes existing safety standards
• Our design eliminates most of the high-voltage
  components

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If Time Allows

• LED Price Tags
• Individually-programmable, updated dynamically
• Solar Power Module
• Fountain Drink dispensing
• General merchandise inventory additions
• VendBot
• Hooligan identification and reporting system

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Budget Budget
Item Price
MDB2PC Donated (300)
LCD 206
Magnetic Card Reader 70
Altera Breakout Board 80
Power Supply 40
PCB 200
Sensors 30
Remote Interface 100
Shipping 100
RFID 50
Misc. Parts 123

Total 999
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Labor Distribution Labor Distribution Labor Distribution Labor Distribution Labor Distribution
Jeff Brendan Erik David
LCD X
MDB X
Control Board X X
Motors X X
E Payment X X
Sensors X X
PCB X X
Power Supplies X
Lighting X
Pricing Display X X
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Schedule
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Goals

• PDR
• LCD functional
• MDB shipped
• CDR
• Preliminary PCB Layout (Rev. 1)
• Understanding of MDB Communications
• E Payment Communication
• Motor Driving

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Milestones

• Milestone 1
• LCD Implemented
• Motor Control Implemented
• MDB Implemented
• Milestone 2
• Sensors Implemented
• Remote Interface Implemented
• Control Board PCB completed

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Roadblocks

• MDB
• Proprietary Signal
• Not easy to convert
• Expensive
• Graphics/ LCD
• Limited Experience
• GUI Programming
• Wireless
• Limited Experience
• Technology
• Security/Privacy
• Credit Card information issues

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