do not feed the robot
DESCRIPTION
DO NOT FEED THE ROBOT. The Autonomous Interactive Multimedia Droid (GuideBot) Bradley University Department of Electrical and Computer Engineering EE-452 Dan Leach and John Hathway Advisor: Aleksander Malinowski May 3rd, 2005. Outline. Project Overview Previous Work - PowerPoint PPT PresentationTRANSCRIPT
The Autonomous Interactive
Multimedia Droid
(GuideBot)
Bradley University
Department of Electrical and Computer Engineering
EE-452
Dan Leach and John Hathway
Advisor: Aleksander Malinowski
May 3rd, 2005
Outline
•Project Overview•Previous Work•Project Description
•Flash interface•Navigation•Implementation
•Remaining Work•Questions
Overview
Features•Friendly touch screen
interface•Auditory and visual
greetings•Pioneer 2 robot platform
by ActivMedia
Pioneer 2 Features•GuideBot uses Saphira and PAI software supplied by ActivMedia for control of movement and other functions
•Eight sonar transducers are positioned in a ring around the front of GuideBot
•PAI software controls all rotational and translational movement, along with taking in sonar data
•Onboard heading information allows for precise turning
•Onboard distance is read from wheel encoders
Pioneer 2 Robotic Platform
PC
User Input ViaTouch Screen
Sensor Data
MappingData
Display Output
Audio Output
Movement of Platform
System Block Diagram
Mapping File
Index,Name,Floor,Lane,X,Y,Crosses To,Is A Stop,Is A Patrol,Type,Manual Commands
0,Origin,3,1,0,0,1,1,1,1,0;1,SEStairwell,3,1,191,0,1,1,0,1,0;2,MalinowskiHW,3,1,762,0,0,1,0,0,0;3,WRestroom,3,1,1219,0,0,1,0,0,0;4,Room327,3,1,1661,0,0,0,0,0,0;5,Room326,3,1,2377,0,0,0,0,0,0;6,RFHW,3,1,2682,0,1,0,0,0,0;7,NEStairwell,3,1,3139,0,1,0,1,0,0;8,SWindow,3,2,0,183,1,0,0,0,0;9,Room330,3,2,747,183,0,0,0,1,0;10,Prasad,3,2,1036,183,1,1,0,0,0;…
Waypoint Detection•Doorframes, open hallways, wall drop-offs
•Waypoint checked every 300 ms using one sonar transducer
•Waypoints are only looked for when GuideBot is within a predefined range of the waypoint
•Offices and other sites that are considered waypoints that have no distinguishable features will be found using the nearest waypoints and the distance GuideBot has traveled
•Most doorframes have a 9cm drop off between the wall and door which is large enough to check with the sonar transducers
9 cm
Collision Avoidance
•Front two sonar transducers are used to detect objects and obstacles in GuideBot’s path
•Threshold distance of 1 meter is used for objects in path
•If there is an obstruction, wait 30 seconds for object to move from path
•Try to navigate around object if it does not move and continue on path
Drift Correction
X
Y’
-2ΘY
Wall
Θ
•GuideBot is designed to follow a straight path to its destination
•Problems with drifting have been observed and a method for correction has been devised using trigonometry
•driftangle = (atan2(driftdist, xdistance))
Remaining Work
•Implement hallway crossing
•Implement manual waypoint paths
•Add additional GUI interaction / motion sensing