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Originally Posted by chitu
Hi EveryBody,
I am Looking For a Wheel Speed Sesnors / Vehicle Speed Sensors that may help in calculating Speed and Distance for my application in absence of GPS Data. Any suggestions on what kind of Sensors I should go with . Any body having prior experience in Anit-Lock Brake System who could guide or share technical Knoweledge/Docs in the same. I am New to the field of Automobiles , Sensors ... Some of the questions I have are .
1. If I go for Magnetic Sensors , they do not give the Vehicle Slip So how to accomadate.
2.Radar Sensors Do give the True Ground Speed but they are pretty Costly .
(Any suggestion on RADAR Sensors that are costeffective )
3. If I have to choose among Magnetic Sensors , which would be better .
1. MagnetoResistive
2. Halls / Differential Halls
3. Inductive
Thanks & Regards
Chitu
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One of the problems with trying to measure distance and direction outdoors (you mentioned a lawn) is that the terrain will affect your measurements if you try to measure using wheelspeed. Slippage on the surface will also affect your measurements, as will the little differences in wheel diameter.
I would suggest not trying to measure by internal sensors, but instead using external references like the following:
In the absence of GPS, I would suggest using a electronic compas like
This one and a simple Radar gun (aimed at and using ground speed) like
This one.
These will give you direction and distance information that will be far more accurate over larger distances.
Good luck. Hope this helps.