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Posted:
Tue Dec 07, 2004 4:22 amby jim fuchs
its a lebow torque sensor ,model 1804-103
cap 500 inch pounds,27000rpm max
ok what kind of hp is 500 inch pounds
and can i use this for a dyno for small engines
also does enyone have a idea how to hook it up .
new cost 3800 and its new . jim
Posted:
Tue Dec 07, 2004 10:02 amby bruce
I'm going to assume you have already looked at for info and installation instructions? I'm sure they could supply you will all the engineering data for you to use this sensor in the application you want.
HP=TorquexRPM/5252
500 in lbs/12=41.66 lbs ft torque so knowing this you can now figureout how much HP this sensor can handle.
Posted:
Tue Dec 07, 2004 1:50 pmby jim fuchs
so did i do this right .27000.x41.66/5252 =214 hp jim
Posted:
Tue Dec 07, 2004 2:08 pmby bruce
Yes your math is correct. Not sure what you would be testing at that RPM though?
Posted:
Wed Dec 08, 2004 3:09 amby jim fuchs
kart engines ,20000 rpm 50hp jim
Posted:
Wed Dec 08, 2004 12:44 pmby 86rocco
Posted:
Thu Dec 09, 2004 4:04 amby jim fuchs
im thinking a nice water pump or a dc motor under load.
Posted:
Thu Dec 09, 2004 11:09 amby bruce
Ok, I'm sure you have already thought all this through but just to findout whatca are thinking of doing I'll ask a question.
1. What RPM range do you need to test at?
You really can't start thinking about anything till you comeup with the answer to that question. Yes you have a sensor that goes to 27,000 rpms but I'm not sure you are going to find a power absorber that will take that rpm?
2. Are you planning on an inertia or steady state dyno?
There is alot of people with alot of knowledge that surf this forum and would be more than willing to help you along the way with your build (I speak from past experiences with fellow members from here) You need to get more of your thoughts out here so they can offer you help along your way.
Posted:
Sat Dec 11, 2004 3:13 amby jim fuchs
would like to make a rolling dyno ,i made a inertia dyno . hooked to a computor,works great but would like a rolling that was portable to track jim
Posted:
Thu Dec 16, 2004 9:01 pmby mecrez
jim I have used these up here at school, they are very accurate, but at least for the ones we use it takes a fair amount of signal conditioning and a DAQ then we have to derive equations relating the voltage going into the DAQ to the torque, the ones we use have a counter that keeps track of rpm's too
yes you do have to provide some kind of external load
if you can try to get the wiring diagram that it requires to output the signal, you have to have that to get anything meaningful out of it
on the otherhand it is perfectly set up for a DAQ since the amount of torque is sent as a voltage
Matt
Posted:
Fri Dec 17, 2004 3:27 amby jim fuchs
this one has a rpm sensor also .i was told that to use it i need a shunt cal. box,,,and a ac carrior singnal conditioner ,,big $. wish i new that thay were in the dumper to i think dang it jim
Posted:
Tue Dec 21, 2004 4:31 pmby mecrez
from what I remember, we made our own signal conditioning circuit( it wasn't me, I don't know much about that stuff) the circuit just used an operational amplifier, but I don't remeber exactly how its supposed to be hooked up, I will try to see if I can't find some documentation to help
Posted:
Wed Dec 22, 2004 11:14 pmby jim fuchs
thanks that would help a bunch jim