1. enter Dept name in Title Master Wait Watcher Midway Design Review Alexander Gutowski Mat Barros Steve Mitchell Advisor: Professor Gong

2. 2 “Wait Watcher” MDR SDP11 Overview  Recap  Feedback from PDR  Updated Design  System Components  Testing  Financial Report  Future Goals

3. 3 “Wait Watcher” MDR SDP11 Recap  Pain to be solved: to eliminate wasting time waiting in line to buy lunch or in other services  Designing an embedded system that communicates with a website displaying wait times to the user Counts people entering and exiting an area Relates wait times to number of people present

4. 4 “Wait Watcher” MDR SDP11 Feedback from PDR  What is the real purpose behind the website?  Cannot have many wires  Our website will generate traffic to restaurants at low times, creating spikes in the data causing unpredicted traffic flows  An empty restaurant could cause concern for patrons  How will wireless communication with the website take place?  Is the backup system, high resolution camera, necessary?

5. 5 “Wait Watcher” MDR SDP11 Updated Design  Updated Purpose Statement: The Wait Watcher system is a website that utilizes an embedded system and infrared sensor grid to count people entering and exiting a restaurant to obtain a busyness level. This real time system aims to inform people how busy a service is before the customer arrives, and to forecast the best time to arrive to minimize the pain of wasting time waiting in line.  People enter through a “grid” of sensors Using Sensor Fusion to obtain 3 pieces of information: Order, timing and Distance Measure the net change in the grid using our decision making algorithm Wirelessly communicates to the website

6. 6 “Wait Watcher” MDR SDP11 Current Block Diagram

7. 7 “Wait Watcher” MDR SDP11 Physical Design Side View of Grid Overhead view

8. 8 “Wait Watcher” MDR SDP11 Sensor Fusion:  Sensor Fusion: using multiple, less complex, sensors to make one complex and cohesive sensor network  Cheaper  More Accurate  Decreased failure rate  Safer, not as harmful to human eyes

9. 9 “Wait Watcher” MDR SDP11 Neural Networks:  Neural Networks: Using multiple factors as layers in the decision making process  Decision Making Algorithm: Decision = W o + W t + W d Order of signals tripped: W o =.75 [∑ s 1 + s 2 +…+s n ] Time signals were tripped: W t =.15 [∑ s 1 + s 2 +…+s n ] Distance of signals tripped: W d =.1 [∑ s 1 + s 2 +…+s n ] Decision OutputAction.80 < D < 1+1 to Count -.80 < D <.80No Action -1 < D < -.80-1 to Count

10. 10 “Wait Watcher” MDR SDP11 System Components  Sensors: Sharp Infrared Long Range Proximity Sensor (10 total)  Analog-to-Digital Converter: Arduino Mega 25600 Board  Microcontroller: Intel Atom Microprocessor  Wireless Transmitter: TRENDnet 300Mbps Wireless Router

11. 11 “Wait Watcher” MDR SDP11 Power Supply  A single power cord for the entire system

12. 12 “Wait Watcher” MDR SDP11 Microcontroller Software  Linux Operating System  Inputs via USB from Arduino A-to-D converter  C program runs decision making algorithm  Data is stored in a MySQL database programmed with SQL query language  Database is stored on the 160GB hard drive of the Atom

13. 13 “Wait Watcher” MDR SDP11 Website Communication  Uses PHP plugin with MySQL to access database  Wireless router connected to Atom provides wireless access point  Website is updated accordingly in 1 minute intervals Green: < 10 minute wait Yellow: 10-20 minute wait Orange: 20-30 minute wait Red: 30+ minutes

14. 14 “Wait Watcher” MDR SDP11 Testing:  Start by testing in SDP Lab Refining the algorithm and system optimization  Have received “Go Ahead” from Blue Wall Management Approved for whatever physical resources or demands our system requires  Live testing in Blue Wall Test Projections and database Check for abnormal use cases in live setting

15. 15 “Wait Watcher” MDR SDP11 Financial Update PartQuantityPrice Sharp IR Proximity Sensor 10$14.99 each 3 Pin IR Wiring Harness10$1.50 Intel Atom Microcontroller 1free Arduino Mega 25601$64.95 9V AC to DC converter2$5.95 TrendNet Wireless Router1$38.95 5V breadboard power adapter 1$9.95 Mini USB to USB cord1$3.95 Projected Cost: $295.00 + Housing Costs

16. 16 “Wait Watcher” MDR SDP11 Goals for CDR  Functional sensor network  Decision Making Algorithm completed  Implement database to store and retrieve data  Initiated testing procedures in SDP

17. 17 “Wait Watcher” MDR SDP11 Thank You!  Questions?  Check team website for more updates http://www.ecs.umass.edu/ece/sdp/sdp11/gong/

18. 18 “Wait Watcher” MDR SDP11 Business Plan  Website will keep track of actual head counts at 15 minute intervals throughout the day Useful to the business for staffing/resource management  The menu will be on the website Free Advertising for the restaurant  By keeping the price of the system capped at $500, the system is extremely affordable A similar infrared people counter that does not offer any commercial aspect, just a head count of people who come and go, costs $200(+) Lends itself to widespread expandability, potentially “Wait Watchers” a social networking site for local restaurants

19. 19 “Wait Watcher” MDR SDP11 Division of Labor  Microcontroller (software side)  Wireless communication  Component research  Website Design  Website software  Neural network and sensor fusion R & D Alex: Steve:Mat:  Microcontroller (Hardware side)  Test location approval

20. 20 “Wait Watcher” MDR SDP11 Pro’s and Con’s Pro’s:  Decreased wait times to get food  Less crowded in the Blue Wall Café  More consistent business throughout the day for Blue Wall  Expandable technology Con’s:  Website might not be used regularly  If count is not accurate people will not use it  Blue Wall might find the system intrusive  Camera’s pose privacy problems

21. 21 “Wait Watcher” MDR SDP11 Design Challenges  Interfaces Sensors Wireless  Comprehension of collected data Signal processing Integration  Cost  Adequate testing location Location of sensors