a.f.c.i. – group 12 alumoline fuel-cell instrumentation nissan gt-r naman chopra suan-aik yeo...
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A.F.C.I. – Group 12
Alumoline Fuel-Cell InstrumentationNissan GT-R
Naman ChopraSuan-Aik Yeo
Ronny WijayaDarin Tanaka
Modified Fuel-Cell EV
Project Specific Success Criteria • An ability to receive and correctly record values from various sensors.• An ability to give appropriate warnings and troubleshooting instructions if
a sensor detects something wrong.• An ability to store data on external memory.• An ability to use a touch screen to send commands to the microcontroller
to control the logging of data and to provide a user configurable display for the logging of data from multiple sensors.
• An ability for the microcontroller to receive and execute commands to remotely enable, disable and control the sampling rate of multiple sensors.
Block Diagram48V-12V
Regulator
ATOM Board
Freescale9S12C32
48 V EV Battery
Pack
7 Inch Touch Screen(USB) LCD
VCC (5V)
ATD2
SPI4 wire
SCI
VCC (5V)
VGAUSB
VCC (12V)
12V-5V Regulator
Thermocouple Amplifier (A)
Thermocouple Amplifier (B)
Thermocouple (A)
Thermocouple (B)
SD Card
Pressure Sensor (A)
Pressure Sensor (B)
VCC
5V-3.3V Regulator
ATD1
ATD5
ATD0
Level Sensor (A)
Level Sensor (B)
ATD4ATD3
Microcontroller:Freescale 9S12C32
• Used in ECE362 – CodeWarrior familiarity.• Has all the requirements we need (SCI, SPI,
8 ATDs)• Might get a bigger version in family
(depending on eventual code size)
Power Supply:VKP100MT 48V-12V regulator
• Converts 48V car battery to 12V for our system• Two 12V channels @4.2A• one 3.3V channel @30A• More elegant and easier than using separate
12V battery for our system
SD reader system
• Sparkfun breakout SD reader module (used successfully in 362 mini-project)
• Maxim 3378E bidirectional 4-channel logic level converter
• 4 signals need to be level-shifted: MISO, MOSI, Slave select and CLK
Thermocouple Amplifier IC:AD595AQ
Translates output of K-type thermocouples to microcontroller-friendly voltages
10 mV/C output
Intel Atom 3.5” MotherBoardAdvantech PCM-9361
• Fanless• Cheapest model available that met all
requirements: Small form factor, serial port, VGA port, CF slot
• No built-in power supply• ATX power: 5V @<= 2.38A and 12V @<=
0.09A
8” LCD Touchscreen displayXenarc 800TSV
• VGA in, touchscreen USB out• 9V-30V operation @ <= 14W• Reputable brand• Found lightly used model for low price
PCB General consideration
• Grouped by their functionality• Give enough floor space for each component• Adapt the orientation to the connecting pins• Interfaces need to be placed on the edge• Except for development purpose pins• µc has the most connected pins• µc is treated as an anchor on the center• Locate bypass capacitors close to the IC
Interfaces – SD Card
• Uses the SPI to SD card module
• Afford space and the 11 pins header
• Through a 4 channels 5 - 3.3 V shifter
• The shifter requires both 5 V and 3.3 V
• Connected to all SPI pins from the µc
Interfaces – RS-232
• Uses the SCI feature of the µc
• Provides the RS-232 header
• Interfaced by MAX3232CD
• Circuitry mimic the development board
Interfaces – Sensors
• Uses the ATD feature of the µc
• Cold Junction Thermocouples
• Interfaced with amplifiers
µc Related - Oscillator
• Bypass capacitors nearby
• Optional external oscillator
• Employ the other side
µc Related – Dev. pins
• I/O pins header for debugging
• BDM pins header for programming
• Give enough space for trace routing
Power Supply – Regulators
• Main power: 48 Volts Battery
• Voltage regulator from 48 Volts to 12 Volts
• VKP100MTC
• Load resistors
Power Supply – Reg. (cont.)
• 12 Volts to 5 Volts• LM22677• For µc
• 5 Volts to 3.3 Volts • TPS7233QP• For SD card module
Project Timeline
• March 5- Complete proof of parts- finalize sensor installation- finish layout of PCB schematic- installation of Ubuntu on CF and environment setup
Project Timeline cont.-
• March 12- initial software for Micro Controller and Atom board- finish routing of PCB
Project Timeline cont.
March 26- Complete software for Atom board- Begin PCB soldering- Complete software for Micro Controller
Project Timeline cont.
• April 2- Complete PCB soldering- Assembly of PCB with LCD and Atom board
complete• April 9
- Connect sensors on golf cart to our system
Software Design
• The system will be setup similar to a server-client architecture
• The Micro will be the server and the atom board the client
• The atom board will send a request to the micro asking for the sensor values
• Messages will be exchanged via “strings”• GUI will be implemented using Java w/ Java
Comm API