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CAMERA CONTROL

Designing a camera subsystem for storing photos and recording position information. Requirements include image storage, flash space, and efficient data handling. System uses digital camcorder with advanced features and RF transmitter. Detailed design and budget considerations are outlined, along with identified risks and ongoing development status.

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CAMERA CONTROL

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  1. CAMERA CONTROL • Robert Koontz • Shadab Ambat • Jeannette Djigbenou • Siva Jeganathan • Justin Raney • Matt Smith UK Aerial Robotics Team University of Kentucky

  2. Objectives Design camera subsystem to store photos and record position information. This will include: • Capturing clear images of the flight especially over the target area. • Allocating memory for the images and position information. • Ability to read/write CAN packets. • Capability to stream video back to ground station. UK Aerial Robotics Team University of Kentucky

  3. Requirements • Storage for images and position data • Estimated mission time of 40 minutes • Image space needed: • 20pics/min =>800pics@~450KB => ~360MB • 40pics/min =>1600pics@~450KB => ~720MB • Flash space needed: 64KB Data/Program Flash • 6 pieces of info @ 8bytes each @800 pics =>~6.4KB • 6 pieces of info @ 8bytes each @1600 pics =>~12.8KB • OS + subroutines uses 24.6KB now • Estimated altitude of 250ft avg during flight • View of 500ft Horizontal @ 2048pixels => 4pixels/ft • View of 288ft Vertical @ 1536pixels => 5.3ixels/ft UK Aerial Robotics Team University of Kentucky

  4. Design • Using Aiptek IS-DV digital camcorder • Fixed lens camera • Digital zooming • NTSC video out • 3MPixels ~ 2048 x 1536 Pixels ~ 450KB/image • Built-in SD Card Slot (Max. 1 GB) • TXA5-Rcb 1W-70 cm transmitter @ 426.25MHz UK Aerial Robotics Team University of Kentucky

  5. System Diagram ATV Plane Link 8051/040 Aiptek cam +3.7 V Transmitter +12 V +9 V Can Bus CH3,4 Baseband Video TVC-4G Down Converter RF TV/VCR Signal Processing Computer ATV Ground Link +120 VAC Power converter +12 V Car Battery UK Aerial Robotics Team University of Kentucky

  6. Budget • Camera • Power in: NP60 Li-Ion Rechargeable Battery 3.7V @ 350mA • Size: 4.0" x 1.8" x 2.4" • $120 refurbished and $10 for mounting hardware • ATV • Size: 1.8 x 3.5 in. Weight: 2 oz. • Power Out: 1.5 Wp.e.p. to 100 mW. • Power in: 350 mA @ 12 V @ 1W UK Aerial Robotics Team University of Kentucky

  7. Risks • Interference between ATV TX and Piccolo TX • Stress relief on PCB connections • A camera hiccup would throw off index for stored position information UK Aerial Robotics Team University of Kentucky

  8. Status • Need to do EMC test with transmitters • Currently writing subroutines to consume CAN packets, read/write memory, and produce CAN packets for debug • Currently inserting functional code into OS and debugging UK Aerial Robotics Team University of Kentucky

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