Channel Descriptions

These data sets include measured data from the sensors, derived values using measured data, and data resulting from modeling. Modeling is necessary to better understand and to make better use of the measured data.

Channel Name	Format or units	Example	Data Group	Description
obc_timeStamp	YYYY_MMDD_ hhmm_ss.sss	2017_0430_ 1844_18.200	OBC	Timestamp from operating system of on-board computer.
obc_sensor	string	LFM	OBC	String representing type of energy: LFM = Liquid Flow Meter.
gps_validity	state	ok	GPS	String representing GPS measurement validity: “ok” or “nok”.
gps_utcTime	YYYY_MMDD_ hhmm_ss.sss	2017_0430_ 1844_17.000	GPS	Timestamp from GPS sensor. Updates once per second.
gps_latitude	degrees	42.327805	GPS	Latitude position from GPS.
gps_longitude	degrees	-83.048379	GPS	Longitude position from GPS.
gps_fixQuality	none	1	GPS	Quality of location values from GPS.
gps_dilution	none	0.8	GPS	Strength of GPS signal.
gps_speed	km/hr	10.9	GPS	Vehicle speed from GPS. Updates once per second.
jm_netJoule	J	5482	JM	Net Joules measured by Joule Meter.
jm_voltage	mV	12353	JM	Instantaneous voltage measured by Joule Meter.
jm_current	mA	12342	JM	Instantaneous current measured by Joule Meter.
lfm_temperature	degC	18.1	LFM	Temperature of fuel measured by Liquid Flow Meter.
lfm_integratedCorrFlow	mL	6.4468	LFM	Volume of fuel consumed since last reset measured by Liquid Flow Meter.
lfm_instantFlow	mL/min	19.0278	LFM	Instantaneous flow rate of fuel measured by Liquid Flow Meter.
gfs_gasFlow	m^3/min	GFS	Instantaneous flow rate of gas measured by Gas Flow Sensor.
gfs_gasTemp	degC	GFS	Temperature of gas measured by Gas Flow Sensor.
gfs_netGasVolume	m^3	GFS	Volume of gas consumed since last reset measured by Gas Flow Sensor.
Lap	Number	0	Post GPS	Lap counter based on GPS position (subject to GPS strength).
GPS Delta Distance (m)	m	1.986111	Post GPS	Difference in position since last GPS update.
GPS Distance (m)	m	907.180556	Post GPS	Integrated distance since last reset.
GPS Speed (m/s)	m/s	3.027778	Post GPS	Vehicle speed from GPS. Updates once per second. Converted to m/s for post processing purposes.
Acceleration (m/s^2)	m/s2	2.166422	Post GPS	Vehicle acceleration calculated from GPS vehicle speed.
Grade	m/m	0	Post GPS	Grade of track based on GPS position (not yet implemented).
e_accel	W	781.196104	Post RL	Physics-based modelling: Power component for vehicle acceleration.(may not be available for some cars)
e_grade	W	0	Post RL	Physics-based modelling: Power component for grade. may not be available for some cars)
Roll Resistance coef	0.007543	Post RL	Physics-based modelling: Coefficient for rolling resistance based on tire pressure and vehicle speed. may not be available for some cars)
e_roll_resistance	W	23.456789	Post RL	Physics-based modelling: Power component for roll resistance. may not be available for some cars)
e_drag	W	23.456789	Post RL	Physics-based modelling: Power component for drag. may not be available for some cars)
e_Road_Load_Total	W	923.456789	Post RL	Physics-based modelling: Total of all power components. may not be available for some cars)
e_Road_Load_netJoules	J	Post RL	Physics-based modelling: Total road load energy since last reset. may not be available for some cars)
e_Road_Load_Total_Force	N	Post RL	Physics-based modelling: Force required to overcome total of all road load power components. may not be available for some cars)
e_Road_Load_Work	kw*hr	Post RL	Physics-based modelling: Energy to overcome all road load components during this sample interval. may not be available for some cars)
LFM_corr_int	mL	0.001234	Post LFM	Volume of fuel consumed since last sample measured by Liquid Flow Meter corrected for 15°C density
LFM_corr	mL	85.678987	Post LFM	Volume of fuel consumed since last reset measured by Liquid Flow Meter.
LFM Flow Rate d15 mL/min	mL/min	123.456789	Post LFM	Instantaneous flow rate of fuel measured by Liquid Flow Meter.
LFM Integrated Fuel Economy d15 km/L	km/L	543.987654	Post LFM & GPS	Overall fuel economy since last reset up to current point in time.
LFM Instant BSFC	g/kW-hr	543.987654	Post LFM & RL	Estimated fuel efficiency in terms of energy consumed as grams of fuel versus energy needed to overcome road load.