Tag Bot: A Robotic Game of Tag Jonathan Rupe Wai Yip Leung

Project Objectives Simulate a game of one-way “tag” using two RC vehicles User controlled target RC vehicle Self-Automated Seeker RC vehicle Infinite games of “tag”

Project Description Signal Detection accomplished by modulated IR Emitters and Detectors Tag simulated by a predefined distance detected by IR Range Sensors No obstacle avoidance If there is no signal detected, seeker vehicle will run a predetermined search pattern

Design Specifications Target will be able to be detected within 8 feet from the seeker vehicle To tag the target, the seeker must be within 24cm of the target

Target RC Vehicle User Controlled via RF Remote Control Circular array of 8 Modulated IR Emitter LED’s Batteries IR LED Emitters

Seeker RC Vehicle 360 degree stand-still turning achieved by 2 independently controlled motors

Seeker RC Vehicle Circular Array of 8 IR LED Detectors 3 IR Range Detectors mounted in the front of the vehicle IR range sensors Circular array of 8 IR detectors Front rear

User Interface Target RC Vehicle – On / Off power switch(es) – RF Remote Control Seeker RC Vehicle – Self-Automated – On / Off power switch(es) – 3 status LED’s

User Interface – Seeker RC Vehicle Status LED’s Signal Present is “on” if the seeker has detected the presence of the target signal, “off” otherwise. Tagged is “on” if the seeker vehicle has tagged the target vehicle, “off” otherwise. ERROR is “on” if an error has occurred. (i.e. hit an object other than target). “Off” otherwise. Signal Present Tagged ERROR

Analytical Components IR Detector Sensors – 8 sensors, mounted equally around 3”- 4” diameter tube – Will detect signal up to 8’ away – Non-modified detection beam width is ±60º Will be shrunk down using tubing to obtain desired beam width based on testing

Analytical Components (cont’d) IR Range Sensors – 3 mounted on front as shown in an earlier slide – Detection distance of target or object is 24 cm – Uses triangulation to detect obstacle

Analytical Components (cont’d) HC12 Microcontroller PORTA PORTB PORTP 8 bits IR Detectors 3 bits IR Range Sensors 3 bits/5 bits LED’s/Motors Port Mapping

Analytical Components (cont’d) IR Range Sensor Mapping Front rear IR Detector Mapping Output Port Mappings Front rear HC12 Status LED0 Status LED1 Status LED2 Motor 1 Motor 2

Analytical Components (cont’d) Seeker Vehicle Analysis – Speed of seeker vehicle will be adjusted to suitable speed determined upon testing – Vehicle will continuously turn to ensure that the signal is always detected from the front-most detector Non-signal based turning will be done on a timed basis

Test Plan Test each segment separately – Modulated IR emitter and detector circuits Complete 360º emission of IR signal Proper directional detection of IR signal – IR range sensors – DC motor control – HC12 code w/out sensors attached Proper execution of search pattern – HC12 code w/sensors attached Proper execution of search pattern & interaction w/sensors

Test Plan (cont’d) Fully assembled testing of seeker and target vehicles – Non-mobile detection of IR signal from target vehicle – Mobile detection of IR signal from target vehicle – Successful searching, tracking, and tagging of target vehicle

Power Consumption

Division Of Work

Work Completed

Work Completed (cont’d) Modulated IR Emitter Circuit

Work Completed (cont’d) Modulated IR Detector Test Circuit

Work Completed (cont’d) IR Range Sensor Circuit

Work to be done Complete IR emitter/detector sensor testing HC12 coding Web page IR range sensor mounting Vehicle construction and hardware mounting Project Testing

Total System Cost

Potential Safety Problems Stubbed toe

Questions ?