1 Clauss Adeline Ly Nathalie GE5S GE III Project January, 16 th 2008 The altitude and speed measuring system of the drone

2 Plan Clauss Adeline Ly Nathalie GE5S January, 16 th Specifications of the project 2.Hardware design 3.Software development 4.Testing 5.Conclusions

3 Part 1. Specifications of the project The Drone

4 Part 1. Specifications of the project On-board electronics Motors Control Speed sensor Altitude sensor Microcontroller PIC18F2520 DSP Data exchanges and treatment chain Inertial measurement unit Rangefinder GPS Amplification stage

5 Part 2. Hardware design Sensors choice Atmospheric pressure sensor MPXA6115A by Freescale + Differential pressure sensor MPXV5010DP by Freescale Scale used : 0 < ΔP < 250 [Pa] Scale used : 800 < P < 1100 [hPa] Altitude range : 0 < a < 200 [m] Speed range : 0 < a < 25 [m/s]

6 Amplification stage Part 2. Hardware design Speed sensor Altitude sensor 18F2550 AD channel Vref- Vref+ Amplificati on 0.2V to 0.4V 1.66V to 4.86V Amplificati on 3.0V to 4.5V 0.71V to 4.89V Vcc 6 Offset Operational amplifiers MCP6144 by Microchip

7 Part 2. Hardware design PCB Microcontroller Supply stage OAs Amplification stage Low-pass filter Speed sensor Altitude sensor

8 Part 3. Software development Means Microcontroller PIC18F2520 by Microchip Pickit2 Programmer by Microchip programmation communication

9 Part 3. Software development Algorithms Initializing µC A/D tool USART tool A/D Conversion channel 0 (speed) Send data ( speed) Calculation (speed) Getting reference P 0 channel 1 (altitude) A/D Conversion channel 1 (altitude) Send data ( altitude) Calculation (altitude)

10 Part 4. Testing Determining OA real characteristics Speed sensor characteristic :

11 Part 4. Testing Determining sensors real characteristics Testing the software…

12 Part 5. Conclusions Technical conclusions Fully working PCB Positive ending Cheap development Work of research, prototyping and communication Heavy problem for PCB printing

13 Part 5. Conclusions Personal conclusions Promoting « Génie Electrique » to the Mechatronics Improving our communication and self-control Improving hardware debug abilities

14 Clauss Adeline Ly Nathalie GE5S January, 16 th 2008 Thank you for your attention