Presentation from Francisco Sanchez Pons at parallel session on FOTs
Transcript of Presentation from Francisco Sanchez Pons at parallel session on FOTs
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3rd editionBrussels, Belgium
Transport Research Arena Europe 2010 7 – 10, June 2010
Requirements for data logging andexperiences with a data-logger in field trials
Francisco Sánchez/ David Sánchez/ Miguel Segovia / Marga Sáez / Julio Coira / María José González
CTAG
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Index
1. Introduction: the EuroFOT challenge
2. Requirements for a logging system
3. Datalogger: from v1.0 to v2.0
4. Results
5. Conclusions
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Introduction
1. Introduction: the EuroFOT challenge
2. Requirements for a logging system
3. Datalogger: from v1.0 to v2.0
4. Results
5. Conclusions
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Introduction
� EuroFOT � Real testing in real conditions of already available Driver Assistance Systems
� Non-professional drivers
� Almost 1.000 vehicles, 12 months ride
� Vehicle’s data and individual driver behaviour information will be collected and analyzed:
� Impacts of safety and efficiency?
� Performance and capability of the systems?
� Driver’s interaction?
� Request for a reliable and effective data-logging process
� Results will support decision making to deploy Driver Assistance Systems and will raise awareness
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Introduction
� Logging system:
� CAN Data + Video + Extra Sensors
� CAN Data + Video
� CAN Data
� CAN-only datalogging system
� Naturalistic study
� Remote data transmission
� 275 vehicles
� German I VMC
� French VMC (with additional video and extra sensor logging)
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Requirements for a logging system
1. Introduction: the EuroFOT challenge
2. Requirements for a logging system
3. Datalogger: from v1.0 to v2.0
4. Results
5. Conclusions
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Requirements for a logging systemMechanical Requirements
� Mechanical requirements� Size and Weight
� To be integrated in vehicle with no apparent notice
� As small and light as possible� To be integrated in a hidden area
� Connectors and Interfaces� Lockable� PC Connection requested� Serial connection requested (integration of
external sensors & logging systems)
� Noise� Fanless system (no noise accepted)
� Encapsulation and temperature� -40 to +85ºC Storage� -20 to +65ºC operating
� Vibration� Able to withstand normal vehicle environment
� Encapsulation� Should stand the normal environment (dust,
moisture) in a vehicle environment
� Crash� System should survive a minor crash
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Requirements for a logging systemElectrical Requirements
� Electrical requirements� Power management
� 12 and 24 V compatible
� System should not cause battery drain in any case
� Switch on should be mated to “ignition on” signal
� Switch off time should be configurable
� System should switch off when battery is below a certain threshold
� Logging system will start operation after an unexpected shut down autonomously
� Power consumption must be low
� Electromagnetic emission and susceptibility
� The system should not interfere with vehicle electrical systems and vice-versa
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Requirements for a logging systemFunctional requirements
� Functional Requirements� Configuration, debug and Software upgrade
� Possibility to be remotely configured
� System verification should be possible remotely
� Status reports are requested (once a day / once per driving cycle)
� Data acquisition, time stamping and synchronization� GPS time synchronization
� All possible signals should be synchronized in the Data Acquisition System (1 ms resolution)
� Configurable sample rates
� Recording of data� Storage of only the selected signals
� Pre-Trigger and Post-Trigger possibilities
� Data storage and encryption� Possibility to encrypt and compress data
� Data should not be overwritten
� Wireless networks� GPRS / 3G capabilities
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Requirements for a logging systemFunctional requirements – Other Requirements
� Functional Requirements (cont’d)� Data formats, uploading and analysis
� Non-propietary data storage format� Data integrity should be checked
� Vehicle bus data� Up to 4x CAN Channels are
requested� Capable to read .dbc files� Capability to send CAN messages� Capability to log data at full frame
rate from every channel
� GPS� 1Hz sample rate or higher
� Start-up time� Minimum start-up time
� Other requirements:� Reliability
� System should work during at least1 year with no maintenance
� Price� As competitive as possible!!!!
ECUECU
Vehicle CAN bus
OBD
connector
GPS & GPRS Antennasmultipurpose camera
radar
accelerometer
OR
Standard with vehicle
Mandatory part of the instrumentation (data)
Optional part of the instrumentation
ECUECU
data logger
ECUECUECUECU
Courtesy of CEESAR
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Datalogger: from v1.0 to v2.0
1. Introduction: the EuroFOT challenge
2. Requirements for a logging system
3. Datalogger: from v1.0 to v2.0
4. Results
5. Conclusions
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Datalogger: from v1.0 to v2.0v1.0
� CTAG’s 1st generation DAS� 2 x CAN channels
� Serial port communication
� 2 Gb SD Card
� USB 2.0 full speed
� External trigger input
� Open source real time operatingsystem (FreeRTOS)
� USB Stack
� This approach did not fulfilEuroFOT requirements
� Further development wasrequested
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Datalogger: from v1.0 to v2.0v2.0
� CTAG’s 2nd generation DAS HW upgrades� New architecture with 2 microcontrollers:
� CAN microcontroller (4xCAN Channels)
� Application microcontroller
� GPRS and GPS Connection (XT65 from Siemens)
� New operation modes� Ignition signal dependant power on
� CAN activity dependant power on
� Consumption reduction� <30 mA in sleeping mode
� 0 mA when ignition is off
� Two power-in versions: 12 and 24 V
� SD and SDHC compatibility
� USB 2.0 high speed (up to 480 Mb) connection
� New automotive compliant connectors
� Configurable LED indicators
� Serial port logging for video synchronization
� SPI Connection availability for future upgrades
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Datalogger: from v1.0 to v2.0v2.0
� CTAG’s 2nd generation DAS SW upgrades� Real time operating system withenhanced CAN driver
� New application processor based onLinux
� GPRS connection to Internet allowingdata synchronization and real time monitoring / tracking
� Script possibilities implemented (phyton)
� Possibility to work as HTTP, RSYNC andSSH server
� Firmware update through SD card orremote instructions
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Datalogger: from v1.0 to v2.0v2.0
CAN processor
CAN 1
Power
supply
12V / 24V
system
Serial
port
RTC & Battery
LEDs
CAN 2
CAN 3
CAN 4
Trigger
Application processor
GPS
SDHC USB
GPRS
Ignition
RAM FLASH
SIM
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Results
1. Introduction: the EuroFOT challenge
2. Requirements for a logging system
3. Datalogger: from v1.0 to v2.0
4. Results
5. Conclusions
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Results
� CTAG’s Datalogger (v2.0) was selected as the chosen device for the CAN-only logging in EuroFOT.
� Installation in 275 Vehicles(German I VMC, French VMC)
� 175 passenger cars
� 100 trucks
� Core element of a systemincluding video logging andexternal sensors in French VMC (5 additional vehicles)
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Results
� Final HW specs:� 110 x 36 x 108 mm
� 274 gr (excluding cabling)
� Fanless device
� Dust and fluid testing (IP50), vibration and temperature testing passed OK
� Operating temperature: -30ºC to +70ºC
� Storage temperature: -40ºC to +85ºC
� EMC requirements met � e-marked
� 23 mA consumption in stand-by mode
� 12 / 24 V operation successfully tested, including power lose
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Results
� Final SW Specs:� 4 x CAN Channel logging, including extended CAN
� Added filtering options (extraction of CAN signals from messages)
� Configurable sampling filters
� Data compression (33%)
� Performance of diagnosis functionality through CAN frames send-out (phytonscript enabled)
� Data transmission through GPRS after a certain time or at the end of the trip
� Real time clock synchronized with GPS data with 1ms resolution
� Remote FW upgrade successfully tested
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Results
� Main challenges:� Compatibility with GPRS data networks
� Conection fading (GPS, GPRS)
� GPS starting time
� SD card reliability
� Power-in stability when vehicle ignition
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Results
� Datalogger will be installed in German I VMC (CAN-Only) andin French VMC
� Pilot testing performed duringMay ’10
� Complete Data-Process testing
� Start of FOT in June ’10
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Conclusions
1. Introduction: the EuroFOT challenge
2. Requirements for a logging system
3. Datalogger: from v1.0 to v2.0
4. Results
5. Conclusions
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Conclusions
� CTAG’s Datalogger was selected to be the DAS in the CAN-only EuroFOT vehicles
� 2nd generation Datalogger was suscesfully addapted to EuroFOTrequirements
� Currently, FOT is about to begin after piloting phase
� Data acquisition
� Data upload procedure
� Data Storage
� Success of the FOT will be closely related with the right opperation of the DAS
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� Project coordinator: � Aria Etemad � FORD Research & Advanced Engineering Europe � Email: [email protected]