• A DISTRIBUTED SENSOR NETWORK FOR AN OFF-ROAD RACING VEHICLE

      Marcellin, Michael; Boyer, Kyle; Brubaker, Laura; Everly, Kyle; Herriman, RIchard; Houston, Paul; Ruckle, Sean; Scobie, Rory; Ulanday, Ian; Univ Arizona (International Foundation for Telemetering, 2017-10)
      The University of Arizona Baja Racing Team competes annually in an intense off-road racing competition. This year’s car features a distributed sensor network capable of displaying useful data to the driver, the benefits and technical aspects of which are examined by this paper. Based on the ATmega2560 chip, the system is USB programmable, features hot-swappable batteries, and includes SMD components. Each sensor is custom designed, functions as an I2C slave, and contains its own ATtiny85 microcontroller allowing all the sensors to be addressable and enables them to be wired in parallel. The system also includes interrupts for almost every single sensor, which allows for more accurate data collection and guarantees that no important data will be missed. A custom-made board was created to connect these sensors and serve as a microcontroller data logger based on an Arduino reference design.
    • AN EXPANDED COMMUNICATIONS SYSTEM FOR OFF-GRID TELEMETRY

      Marcellin, Michael; Boyer, Kyle; Brubaker, Laura; Everly, Kyle; Herriman, RIchard; Houston, Paul; Ruckle, Sean; Scobie, Rory; Ulanday, Ian (International Foundation for Telemetering, 2017-10)
      The drivers of the University of Arizona Baja racing team must be intensely focused on tackling the jumps, boulders, mud bogs, and other challenges in the four-hour endurance race. These obstacles are just as demanding on the vehicle as the driver, so the pit crew needs effective ways of detecting problems within the vehicle before serious damage occurs. Our solution is a wide range, AES encrypted, Wi-Fi communications system that supports full IP protocol and live video feed, allowing our telemetry data to be accessed through a smartphone via a web interface. To provide a wide range of communication options, our system supports VOX and push-to-talk audio compatible with third-party radios, and has an on-board HDMI screen for text-based communications. Finally, our system is backwards compatible with prior generations to make repairs and replacements easy.
    • TELEMETRY AND DATA LOGGING IN A FORMULA SAE RACE CAR

      Marcellin, Michael; Schultz, Aaron; Univ Arizona (International Foundation for Telemetering, 2017-10)
      The problem with designing and simulating a race car entirely through CAD and other computer simulations, is that the real world behavior of the car will differ from the results outputted from CFD and FEA analysis. One way to learn more about how the car actually handles, is through telemetry and data logging of many different sensors on the car while it is running at racing speeds. This data can help the engineering team build new components, and tune the many different systems on the car in order to get the fastest time around a track as possible.