watch your back!
DESCRIPTION
Watch Your Back!. Team BAKE Bryan Schoen Ashish Bablani Kelby Penney Evan Schurr. Overview of Presentation. Description of Mechanical Design. 2. Description of Logic Circuit + Progress. 3.Description of Motor,Drivers . 4. Memory map, CPLD, Stepper. - PowerPoint PPT PresentationTRANSCRIPT
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Watch Your Back!
Team BAKEBryan SchoenAshish BablaniKelby PenneyEvan Schurr
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Overview of Presentation
1. Description of Mechanical Design
2. Description of Logic Circuit + Progress
3.Description of Motor,Drivers
4. Memory map, CPLD, Stepper
5. Milestone Targets & Work Distribution
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Description• Wireless autonomous vehicle equipped with a
camera and paintball gun• Sensors may include: motion, video, audio and
light• Vehicle can be controlled by 802.11B
communication• The data will be transferred back wirelessly to a
computer with a controller (keyboard)• Data can be viewed and controlled in real time
by a user interface
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Gear System• Created in Solid
Works via Gear Trax• 2 Spur Gears• Small gear will be
attached to the shaft of the stepper motor and will displace the larger gear
• Larger gear will have gun attached to it
•Gear system will be attached to the top of this unit
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Gears
Gun
Large Gear
1 of 2 Support Columns That Attach to the Platform
Stepper Motor
Small gear
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Servo Motor Driver
• LMD18200– 3A H-Bridge motor– Bipolar circuitry– Accomodates peak
output currents up to 6A
• Delivers up to 3A continuous output
• Operates at supply voltages up to 55V
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PMI Piranha EFORCE EXT• 9V input power for electronic trigger• C02 powered• Various modes – single shot, burst, full auto• Trigger controlled by solenoid piston• PROBLEMS!!!
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Processor – Motorola HC11K1
– 16 bit address– 8 bit data– 8 MHz clock– 4 PWM outputs for motor drivers
– Memory map to the right– Uses accumulator A & B for data registers– Read and write data and address on
falling edge of E clock (1 MHz)
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HC11/Memory/CPLD Schematic
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Wire Wrapped HC11/Memory/CPLD
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Memory Mapping• Internal memory
– $0 - $0FFF• Ram
– $1000 - $7FFF• Flash
– $8000 - $FFFF
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CPLD Logic• Input Pins
– Top 4 MSB address bits• Output Pins
– Chip select to Ram when address bits are $1 - $7
– Chip select to Flash when address bits are $8 - $F
– Future chip select to DC servo motor drivers and Stepper motor driver
• Add 2 more address bits
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CPLD Schematic
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Stepper Motor
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A3967 Stepper Motor Driver• Controlled by PWM output of microcontroller• Can microstep up to 1/8 of 1.8 degrees• Output current limit – 750 mA• Sleep function to minimize power loss• Thermal shutdown temperature of 165
degrees C
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Stepper Motor Driver Schematic
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Wireless Web Cam & Router
The WebCam
-Plug and play
-Great Resolution (640*480)
-Control of Movement
-Remote Management
The Router
-helps communicate between PC & WebCam
-helps in sending control signals to the WebCam
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RS232 connectionMax233A
-Driver for the rs232 interface-Dual transceiver and has
internal capacitors (saves space on board)
The Adapter-One end (DB9) connects
to a PC or any other terminal.
-The other end provides a 4-pin header to connect to any micro controller board that requires serial I/O
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Final Parts• The Brain
– Clock – 8MHZ – Data and address buffers - – Microprocessor – Motorola MC68HC11K1– CPLD – 44PIN -XC9572– Flash RAM – Rom - EEPROM– Test Pins– Power Strips– RS232 ports - MAX233A
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Final Parts• The Motor
– Servo Driver Chips , National Instruments– Stepper Driver Chips, Allegro A3967– Servo Motors, DC servo disc motors– Stepper Motor , Sure-Step– Power Strips
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Final Parts• The Others
– Base Platform– Plastic Gear– “Air powered launcher”– Wireless Web Cam– Wireless Router– Solenoid– *RF transmitter (HAC-UM)– **Sensors
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Motorola68HC11K1
Micro-Processor
SerialRS-232 Paintball gun
- trigger
Ram
Rom
DC Motor Drivers
44 pinCPLD
1 StepperMotor2 DC Servo Disc Motors
WirelessWeb-Cam
Computer
Hardware ImplementationControl signal
Wireless transmission Driver for
trigger
Devices Built, incorporated & tested Currently in progress
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Timeline Status • By Milestone 1 - We should have the following:
– The servos motors – should be able to move as we expect it to, giving it the control signals from the computers keyboard it should move smoothly and in the appropriate direction.
– The stepper motor – should also move up and down as required and also making sure that it also does this very smoothly (using the driver for this motor will allow us to take 1/8th of a single step 1.8Degrees / 8 = 0.225 Degrees / Step)
– The RS232 – making sure that giving the instructions from the computer is interpreted as required
– Connection between our brain circuit with the motor circuit – this will enable us to use the brain part of the circuit to control the functions of the motor drivers which then will control the movement of all the motors.
– Testing everything for basic functionality
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Timeline Status• By Milestone 2 - We should have the following:
– More complex functions for our system – such as automated functions like the Valentines Day Massacre
– Incorporate the RF device (HAC-UM) from SPARKFUN
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Timeline StatusBy EXPO - We anticipate to have the following:
Have complete desired functionality of our system including – Complex Logic– Wireless Control– Ability to sense objects (to avoid crashes)– Smooth operation of all our motors– Smooth operation of our overall system
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Distribution of WorkKelby
-Setting up the stepper motor and driver-Setting up the microprocessor + Ram + ROM + Buffers & CPLD
Evan-Designing the Gear mechanism to hold the gun-setting up the Servo motors and drivers-Wireless Web-Cam setup + UI
Bryan-Programming the CPLD-Setting up the microprocessor + Ram + ROM + Buffers & CPLD
Ashish– Programming the microprocessor – Setting up the Servo Motors and drivers– RS232 Interface (between PC and board) + UI
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Gantt Chart
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Questions?