leitmotif
Member
I am in initial stages of selecting sensors to monitor and record electric vehicle performance.
MONEY We do not have a huge budget so we must buy good equipment only ONCE - price while important is second to quality, durability and reliability
Again because of money we are going to use what we got. I suppose Labview or other software and computer installed in vehicle would be better but the budget,,,,,,,
All sensors will more than likely be removed and installed on multiple vehicles so they must be hardy ie boob proof - OK OK resistant.
Will use Fluke Hydra Bucket 21 channel data logger. This unit accepts voltage inputs only both DC and AC thermocouple and RTD and maybe pulse (gotta read the manual on this)
I do not want battery line voltage in the cab where data logger will most likely be located to prevent someone contacting 144 or more (allow for 400 VDC)
I am only asking for help to select good manufacturers to contact for brochures. I have Branom Instrument in Seattle to talk with and will of course. But I want to tap the brains of the guys who use and repair on a daily basis.
I do not know how or where sensors will be mounted so assume worst case -- under the vehicle not enclosed exposed to water mud splash etc. Yes I am smart enough to not mount instruments in these conditions but I may not be the only one doing this so allow for a boob factor.
Initial vehicle to measure is a Datsum pickup with 124 lead acid battery, driving a series DC motor via a 4 speed transmission. Will be looking at vehicle this Sat and get dimensional details etc.
FUTURE VEHICLES
Battery voltage up to 325 (allow to 400 for charging)
MEASURED & RECORDED PARAMATERS
Relative wind velocity (have instrument)
Need insight and recommended mfr for the below
Motor RPM 0 to 5,000 -- use encoder??
Vehicle speed (driveline RPM maybe) or a bicycle wheel off back end with tach gen or encoder??
Motor amps -- using Hall effect "shunt" 0 to 500 amp
Battery amps (both charge and discharge) 0 to 500
DC line voltage both charge and discharge 0 to 400. This is the one that I am scratching my head on. Need suggestion on how to sense and have an output at a low voltage ie 0 to 10 VDC.
We will do testing on varying slopes possibly up to 21%. This will have to be hand recorded.
Transmission gear selection will also be hand recorded (should be able to get this if we have record of vehicle speed and motor speed but will worry about that later)
Data will be used to calculate
Torque vs RPM at varying grade
Kw per mile, Kw vs speed at varying speeds
Kw vs speed vs slope of road
Kw vs speed and wind at various speeds.
Thank you guys for the help. Will report results and share data if you want.
Last and most important to ensure I am PC and I get all the various cultures covered
Seasonal and other factor appropriate Felicitiations.
Aw nuts to all that
Merry Christmass and a Happy New Year.
Dan Bentler
MONEY We do not have a huge budget so we must buy good equipment only ONCE - price while important is second to quality, durability and reliability
Again because of money we are going to use what we got. I suppose Labview or other software and computer installed in vehicle would be better but the budget,,,,,,,
All sensors will more than likely be removed and installed on multiple vehicles so they must be hardy ie boob proof - OK OK resistant.
Will use Fluke Hydra Bucket 21 channel data logger. This unit accepts voltage inputs only both DC and AC thermocouple and RTD and maybe pulse (gotta read the manual on this)
I do not want battery line voltage in the cab where data logger will most likely be located to prevent someone contacting 144 or more (allow for 400 VDC)
I am only asking for help to select good manufacturers to contact for brochures. I have Branom Instrument in Seattle to talk with and will of course. But I want to tap the brains of the guys who use and repair on a daily basis.
I do not know how or where sensors will be mounted so assume worst case -- under the vehicle not enclosed exposed to water mud splash etc. Yes I am smart enough to not mount instruments in these conditions but I may not be the only one doing this so allow for a boob factor.
Initial vehicle to measure is a Datsum pickup with 124 lead acid battery, driving a series DC motor via a 4 speed transmission. Will be looking at vehicle this Sat and get dimensional details etc.
FUTURE VEHICLES
Battery voltage up to 325 (allow to 400 for charging)
MEASURED & RECORDED PARAMATERS
Relative wind velocity (have instrument)
Need insight and recommended mfr for the below
Motor RPM 0 to 5,000 -- use encoder??
Vehicle speed (driveline RPM maybe) or a bicycle wheel off back end with tach gen or encoder??
Motor amps -- using Hall effect "shunt" 0 to 500 amp
Battery amps (both charge and discharge) 0 to 500
DC line voltage both charge and discharge 0 to 400. This is the one that I am scratching my head on. Need suggestion on how to sense and have an output at a low voltage ie 0 to 10 VDC.
We will do testing on varying slopes possibly up to 21%. This will have to be hand recorded.
Transmission gear selection will also be hand recorded (should be able to get this if we have record of vehicle speed and motor speed but will worry about that later)
Data will be used to calculate
Torque vs RPM at varying grade
Kw per mile, Kw vs speed at varying speeds
Kw vs speed vs slope of road
Kw vs speed and wind at various speeds.
Thank you guys for the help. Will report results and share data if you want.
Last and most important to ensure I am PC and I get all the various cultures covered
Seasonal and other factor appropriate Felicitiations.
Aw nuts to all that
Merry Christmass and a Happy New Year.
Dan Bentler
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