1 clauss adeline ly nathalie ge5s ge iii project january, 16 th 2008 the altitude and speed...
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1
Clauss AdelineLy Nathalie
GE5S
GE III Project
January, 16th 2008
The altitude and speed measuring system of the drone
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2Plan
Clauss AdelineLy Nathalie
GE5S
January, 16th 2008
1. Specifications of the project
2. Hardware design
3. Software development
4. Testing
5. Conclusions
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3Part 1. Specifications of the project
The Drone
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4Part 1. Specifications of the project
On-board electronics
Motors
Control
Speed sensor
Altitude sensor
MicrocontrollerPIC18F2520
DSP Data exchanges
and treatment chain
Inertial measurement unit
Rangefinder
GPS
Amplificationstage
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5Part 2. Hardware design
Sensors choice
Atmospheric pressure sensorMPXA6115A by Freescale
+Differential pressure sensorMPXV5010DP 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]
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6
Amplification stage
Part 2. Hardware design
Speed sensor
Altitude sensor
18F2550
AD channel
AD channel
Vref- Vref+
Amplification
0.2V
to
0.4V
1.66V
to
4.86V
Amplification3.0V
to
4.5V
0.71V
to
4.89V
Vcc
6
Offset
Offset
Operational amplifiersMCP6144 by Microchip
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7Part 2. Hardware design
PCB
Microcontroller
Supply stage
OAs
Amplification stage
Low-pass filter
Speed sensor
Altitude sensor
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8Part 3. Software development
Means
MicrocontrollerPIC18F2520 by Microchip
Pickit2 Programmerby Microchip
programmation communication
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9Part 3. Software development
Algorithms
Initializing µC A/D tool USART tool
A/D Conversionchannel 0 (speed)
Send data(speed)
Calculation(speed)
Getting reference P0
channel 1 (altitude)
A/D Conversionchannel 1 (altitude)
Send data(altitude)
Calculation(altitude)
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10Part 4. Testing
• Determining OA real characteristics
Speed sensor characteristic :
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11Part 4. Testing
• Determining sensors real characteristics
• Testing the software…
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12Part 5. Conclusions
Technical conclusions
Fully working PCB
Positive ending
Cheap development
Work of research, prototyping and communication
Heavy problem for PCB printing
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13Part 5. Conclusions
Personal conclusions
Promoting « Génie Electrique » to the Mechatronics
Improving our communication and self-control
Improving hardware debug abilities
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14
Clauss AdelineLy Nathalie
GE5S
January, 16th 2008
Thank you for your attention