240 likes | 333 Views
Advisor: Frank Hludik. Project Goals. Design and assemble a versatile, remote controlled surveillance robot Minimize fabrication expenses. Practical Uses. Bomb Defusal Hostage Situation Hazardous Chemical Environments Battlefield Reconnaissance Proactive Surveillance. Honors Thesis.
E N D
Project Goals • Design and assemble a versatile, remote controlled surveillance robot • Minimize fabrication expenses
Practical Uses • Bomb Defusal • Hostage Situation • Hazardous Chemical Environments • Battlefield Reconnaissance • Proactive Surveillance
Honors Thesis • Significance of Unpersoned Robots • Background / History of Robotics • Contribution Elaboration
Design Inspiration Sources • Recon Scout XT iRobot 510 PackBot
Recon Scout XT • Advantages • Small Weight • Quick Deployment • Night Vision • Disadvantages • Limited Functionality • Limited Durability
iRobot 510 PackBot • Advantages • Open Ended Functionality • Durability • Night Vision • More Informative Feedback • Disadvantages • Longer Setup Time • Cumbersome
Stability Wide body provides stable base for arm
Stair Climbing Short body creates low center of gravity Maximum Stair Rise: 8 ¼ inches Minimum Stair Run: 9 inches
Camera Arm Motion Worm gear transmission for bottom of arm Custom mount for ‘elbow’ joint Dual axis pan-and-tilt camera mount
Video Camera • 802.11n v2.0 Compliant WiFi • 640x480 pixel resolution • 44 degree viewing angle • In/Out ports to network alarm systems • Omnidirecional Mic and Speaker • Record video feed to disk
Wireless Data Transmission • Two wireless channels to simplify design and maximize available bandwidth • Control link • Video Camera Link • Include provisions for loss of data/signal • Antennas will be an important design choice
Control Link • Long range XBee 900MHz RF transceivers • Data transmission at 9600bits/s • Rated up to 1200ft indoors • GUI will send control data to Robot; Robot will send sensory data to GUI • Data will be transmitted between GUI and robot as string “packets” • Ex. “>L=128,R=255<“ • GUI will transmit packets at specified intervals so that robot can easily identify when link has been lost
Video Camera Link • Point-to-point 802.11n WiFi connection between router and camera • Fast, tested, and reliable link with a large bandwidth • Data can be easily encrypted
Microcontroller • Handles control of all systems on the robot • Communication with GUI • Motor control • Interface to component systems • Power management
Arduino • Arduino Mega with Atmel ATmega1280 microcontroller • Open-source design with various code libraries to simplify implementation • Programming can be done in Arduino IDE or in Eclipse (with WinAVR plug-in) • Plenty of online support • Various component “shields” developed for Arduino microcontroller line
Drive Motors Voltage: 12V Stall Current: 21.3A Torque: 98 in-lbs Weight: 2.6lbs
Driver and Power Interface Microprocessor Drive Motors Arm Motors Motor Driver Power Control Motors Active Antenna Data Transmitters Camera GPS
PCB Fabrication • Gerber Files • BATCH PCB
Battery Considerations • Peak Current Considerations • Desired Run-time • Estimated Drive Current • Battery Options • NiMH Batteries • Lead Acid Batteries
Budget • Total budget: $1,900 • Sources: • L-3 Insight Technology: $1,500 • ECE Department: $400