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الموضوع: Sense and Avoid UAS Project Final Design Report

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    Consultant Engineer الصورة الرمزية أسامة حسن البلخي
    تاريخ التسجيل
    Sep 2014
    الدولة
    مكة المكرمة
    المشاركات
    1,402

    Sense and Avoid UAS Project Final Design Report

    For the circuit powering the system the team and the sponsor formulated thefollowing two options. Option one is a lower voltage battery with a circuit thatamplifies the voltage for the system. Originally, the team had a simple operationalamplifier but after talking with the sponsor, the team realized that the voltage couldnot be amplified with just a simple operational amplifier. The sponsor pointed outthat the team oversimplified this problem and in order to amplify the gain a DC to DC(direct current to direct current) voltage converter would be needed. In order tocreate the DC to DC voltage converter, the team would have to build one fromscratch or purchase one. Designing one would complicate this subsystem andincrease the weight of the overall system past the two pound limit.The second option is a higher powered battery with a voltage divider to step thevoltage down to 12V. This circuit would be simpler, however it would put us over thetwo pound limit. The simplicity of this circuit would allow the circuit to be designedand fabricated reasonably quickly. Also, the higher voltage battery guarantees thatthe system will have enough power.The next part of the circuit the team had to consider was how the data was going tobe transferred. The team narrowed it down to two options. Option one was totransfer data through simple wiring and option two was transferring data using atransceiver.Transferring data through a wire creates a lot of resistance. The wiring would need tobe of minimal length in order to minimize the power draw. Setting up a circuit is alsothe more complicated route. Creating a transceiver and sending the data wirelesslywould be a simpler form of data transfer. However, the simpler transceiver createsmore problems in the system. The error risk increases, as well as the processingtime. Also, the sensor would require a circuit and transmitter to send the data andthe microprocessor would require a receiver and circuit to encode the data. Thiscauses the weight of the system to increase and increases system complexity.MicrocontrollerThe microcontroller is a central aspect of this project. The radar sensor is limited to arange of 200 meters. Therefore, it is important to minimize the total processing time.There were three microcontrollers the team investigated, the Arduino Uno, MSP430G2 and the Raspberry Pi.
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