SMART SIGNAL (owned by GE)- Digital Marketing Practicum Project
To come up with a practicum project that full filled the 411 requirements Create a fun project that...
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Transcript of To come up with a practicum project that full filled the 411 requirements Create a fun project that...
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Line Following RobotDavid Bouse
Jonathan ChenMichelle ChuKayla Seliner
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Need • To come up with a practicum project that full filled the 411 requirements• Create a fun project that would get kids interested in science and engineering. • Incorporate all the engineering knowledge we have learned over the past 3+ years.
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Objective
• To design, test, and build a mini robot that senses and maneuvers along a path. • This path is a visible black line on a white surface.• The robot will navigate based on the feedback between sensors and motors.
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Approach • Decision Matrix with four different projects.
• Line following robot was the winner.• Project Proposal• Requirements Specifications• Design Process
• Block Diagram• Schematic• Parts List• Board Layout• Prototype
• Testing
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Requirements Specifications Engineering Requirements
Power•Robot must be able to operate on a battery supply•Robot must operate for a minimum of 2 hours before replacing battery
Cost•Material cost must not exceed $100/robot
Usability•Robot must not exceed .75 pounds•Robot must detect a black line with a width between .6 in. to .9 in.•Robot should follow a line with minimum radius of 6 in.
Safety •Robot must not have any exposed wires•Robot must not contain any harmful materials
Marketing•Robot must be controlled by micro-controller•Robot must have at least one input sensor•Robot must have at least one actuator•Robot must use a two layer PBC that is between 1 & 16 in. 2, with no side smaller than 1 in. or bigger than 12 in.
Justifications
Easy to replace and low cost. / Allows portabilityLimit the frequency needed for battery change
Team members have limited funds for this project
Limit the load on the motorsStandard width of electrical tape is 0.75 in & easily used to create a lineMinimum maneuverability of robot.
Prevent shocking the user when in use.Robot will be used by children & must be safe
Requirements set by Andrew Greenburg.Requirements set by Andrew Greenburg.Requirements set by Andrew Greenburg.Requirements set by Andrew Greenburg.
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Design Process• Basic Block Diagram
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Hardware Design
• Level - 0 & Level -1 Block Diagram• Prototyping
• Sensor • Motor
• Design Power Supply• Schematic• Board Layout• Prototyping
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Schematic Design
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Board Layout
Top Layer Bottom Layer
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Software Design• Basic Algorithm
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Software Design (Cont.)
• Differential signaling• Calibration
• Forward• Left (6 different
sharpness's)• Right (6 also)
• Hard coded values for speeds
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IP and Prior WorkLego Power Motor
Schematic and use www.philohome.com/pf/pf.htm
Arduino Uno Prototyping Micro-Controller
arduino.cc/en/Reference/HomePage
LadyadaInterfacing photocells
http://www.ladyada.net/learn/sensors/cds.html
Blogs SpotInfrared Transmitter information
http://irbasic.blogspot.com/
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Testing
Hardware Testing•Tested different types of sensor•Photo Resistors•Investigated sensor output values•Motor Testing•Power Supply Testing
Software Testing•Applied PWM to control motor speed•Used sensor for motor control•Tested prototype with motors and sensors to control direction
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Test Cases
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Test Cases
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Alternative Sensor Methods
IR Sensors
Photo Transistors
Voltage Range was limited
Light Sensing Range was limited
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Results
• By integrating the sensors, microcontroller, and motors our robot was able to follow a black line!
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Bill of Material
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Contributions
David Bouse• Board Layout • Enclosure Design• Schematic
Jonathan Chen• Schematic• Hardware Testing• Prototyping• Software• Enclosure Design
Michelle Chu• Hardware Testing• Schematic• Prototyping• Enclosure Design
Kayla Seliner• Software • Software Testing• Prototype Testing• Web Administration
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Lessons Learned
• Schematic Design• Board Layout• Soldering• Prototyping• Testing & Debugging• Scheduling / Time Management• Team Coordination
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Questions?