pdr presentation

Electronic Dartboard – http://www.ecs.umass.edu/ece/sdp/sdp06/fischetti/

PDR PRESENTATION

Electronic Dartboard (ED)

Azum Z. Ali, Jason Ngo, Matthew O’Connell, Han TruongFaculty Advisor: Prof Massimo (Max) V. Fischetti

Thursday, October 13, 2005


Introduction

● Building an Electronic Dartboard (“ED”) that automatically

keeps track of score● Recreational activity for a variety of potential customers● Automation is provided by electronic system● Sensing Array● Intermediate hardware for data transmission● Software for computation and output


Background

● Dartboard on the market – made out of plastic– very unreliable– unattractive– not regulation– use plastic darts

● ED's Design– horse hair/cork– reliable scoring– sleek design– regulation size– any standard darts


Motivation

• Darts are a fun recreational activity• Project deliverable fun and enjoyable• End disputes over scoring, cheating• No longer responsible for scorekeeping, more

focus on fun and gameplay• Great to demo for SDP06


Overview

• Sectionalized board• Sensing electronics• Data Transmission• Software• Combine into

functional design


Long-term goal

● MDR– Working reliable sense system– Efficient data transmission

● Final Design– All sections working– Accurate scoring


The Present Situation

● Researched hardware specs● All sensors are on order (multiple options)● Micro-controllers chosen● Chose serial transmission● Overall plan agreed upon


Development up to present

● Members researched different sensors● Spare dartboard for implementation● Extra parts for testing● Sensors agreed to test

– Strain gauges, Piezoelectric, Push-Button

● Sensor rejected– Laser grid (cost, unfeasible implementation)


Potential Alternatives

• Strain gauges

– pressure applied resistance goes up

– create resistor circuit for voltage differences

• Pros

– Simple design

– Sensitive to pressure

– Low cost

• Cons

– Is it too sensitive?


Potential Alternatives(contd.)

• Piezoelectric– Disturbance in Quartz crystals on Piezo material

induces a voltage• Pros

– Low cost– Piezo material can cover area needed– Good sensitivity

• Cons– Could damage Piezo film with darts


Potential Alternatives(contd.)

• Pushbutton– Spring is compressed, voltage signal output

• Pros

– reliable

– different sizes, shapes, springs

– Low cost

• Cons

– sensitivity of pressure applied

– spring constants


System Block Diagram


● Pressure sensors ● A/D Converter● Foot Line Sensor● Power supply

Dartboard Electronics


● Receive Data● Store Data● Convert Data● Transmit Data● Serial Connection

Microprocessor


● Store Data● Compute Data● Display Data● GUI

Computer Program


Proposed MDR Specifications

● One or more sensing options working● Operational sensor applied to sections on

dartboard● Serial transmission of bits to computer● Computer recognizes values assigned to

sections


Conclusion

● Automatically keep score● Efficient and Reliable Sensing● Values recognized and Displayed on GUI● Overall fun and hassle-free gameplay!


Any questions?

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