FRC-004 Communication Radio System Development

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Dudás Levente
Department of Broadband Infocommunications and Electromagnetic Theory

FRC - 004 is a student racecar, designed by the BME Formula Racing Team. I’m a member of this team since the spring of 2010 as an electrical engineer. Formula Student (FS) is Europe's most established educational motorsport competition. The competition aims to inspire and develop enterprising and innovative young engineers.

There’s a co-called Cost and Manufacturing Event on every FSAE event, which is held to teach the participants that cost and budget are significant factors that must be considered in any engineering exercise. It’s important to understand the principles of design for manufacture and assembly, lean manufacturing and minimum constraint design.

Driver to pit crew communication is needed in all kind of motorsports nowadays. It helps telling the driver telemetry informations, or –which is more important- warning him in case of emergency, since mechanical problems are more visible from outside. That’s why I wanted to design my own communication-system to the car. The system has to be proof against shaking and water, has to use the battery of the car and needs to work in a 1000m of radius.

Desingning a radio starts with choosing the RF module, and the microcontroller. After this, the schematic of the circuit has to be sketched. Next step is to design the printed circuit itself, and get it manufactured. Then we can start soldering the parts. The hardware needs a software, so a controlling code has to be written. If these are done, we can start testing the system. First in laboratory, then outside. During the test we have to learn to use the spectrum analizator and the oscilloscope.

If the tests seem to be correct, we can start to develop the box itself. We have designed a tool, which we can use to manufacture a carbon box.

Briefly, these were my main tasks during the semester. Finally, an operable radio has been made and tested, which uses digital FSK modulation to transmit/receive analog signal. Human voice to be exact.


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