Joseph Ratliff EE Software Research PCB Design Obstacle Detection Motion Detection Ryan Crownover EE Coding Logic Motion System Software Design Website Tyler Ross EE Hardware Design Motion Detection Power System Analysis Team Advisor Dr. Raymond Winton Lee Jones EE Hardware Design PCB Design Power System Design Dr. Randy Follett Class Professor

Overview Market Requirements Technical Specification Functional Decomposition Work Schedule Design Implementation Cost Analysis Testing Issues Summary Q&A

2 Semester Product Development Involves the use of technical skills obtained through the Electrical and Computer Engineering Undergraduate Program

Currently, cooler transportation is time consuming, cumbersome, and exhausting, and the source of these difficulties has gone unchanged for years: human involvement.

The Kooler Kart will reduce the need for human involvement in a cooler transportation process. Hands free Designed to be user friendly.

The Kooler Kart must satisfy the following requirements: Hold the weight of a 25qt cooler (~60lbs loaded) Travel at a max speed of 6 mph

The Kooler Kart must be simple enough that someone can operate and charge it, regardless of their knowledge of motion technology. Battery Charge Display Motor Disengage Option

Beacon Drive System Microcontroller Object Sensors Beacon Sensors User Kooler Kart Power Power Supply

TaskSept.Oct.Nov.Jan.Feb.Mar.Apr. Project Plan Hardware Roles Drive System / Testing Beacon / Testing Object Detection / Testing Packaging Full Integration

Kooler Kart Design Subsystems Packaging

Kooler Kart Object Sensors Receivers Beacon

Uses Ultrasonic Rangefinder and an RF Link simultaneously Ultrasonic Pulses to receivers to determine the angle of the user from the kart RF Link Pulses to the RF receiver calculating the distance the user is from the kart

Array of 6 Ultrasonic Rangefinders Fires consecutively detecting object up to 1m away

Beacon angle and distance found Kooler Kart will move: Forward, Reverse, Port, and Starboard Object detected Kooler Kart will avoid object while searching for beacon signal

Main Board PCB Kooler Kart Prototype

Main Board PCBPCB Schematic

Parts ListsNumberCostProduction Cost/One Microprocessor1$70$50 HC-SR047$21 Servos1Donation$120 PCB2$25$80 RF (Rx,Tx)2$20$5 40KHz Receiver Circuit2$15 Cart Frame1Donation$40 Total16$151$331

Beacon Detection Object Detection Best/Worst Case Scenario

Beacon Signal Receivers [4] Max Variance: 5.83 ⁰ Min Variance: 0.67 ⁰ Field of View: +/- 60 ⁰

Beacon Sensors Distance: 2m Distance Expected Avg % Error 100 cm1.8% 200 cm4.9% 300 cm10%

Beacon Sensors Object Object Case – 50 cm Distance % Error % 2 3.2% 3 5.4% 4 6.2% 5 4.9% %

Kooler Kart User Collision Object Travel Direction

Kooler Kart User Collision Object Travel Direction

Kooler Kart User Collision Object Travel Direction

Kooler Kart Travel Direction User Collision Object

Kooler Kart Travel Direction User Collision Object Out of Viewing Angle

Receiver Noise Beacon Detection Method Object Detection Array

I: Motivation Pick a project that will keep your interest II: Time Management Allow yourself time for errors III: Research Always do your research before ordering parts

PCB Design Motion Control Systems Ultrasonic and RF communication

Beacon Detection System Teamwork and Communication

[1] Eric. Infrared vs. Ultrasonic - What you should know Online: [2] “Arduino Mega,” in Arduino Oct. 2. Available: [3] “Ultrasonic Module HC-SR04,” in Hobby King Oct. 2. Available: c_module_hc_sr04_arduino.html c_module_hc_sr04_arduino.html [4] Hashizume, H.; Kaneko, A.; Sugano, Y.; Yatani, K.; Sugimoto, M., "Fast and Accurate Positioning Technique Using Ultrasonic Phase Accordance Method," TENCON IEEE Region 10, vol., no., pp.1,6, Nov doi: /TENCON