[Diy_efi] Traction Control System (update 2)

[Kenny]

You'd need to monitor whether or not the couter has 
changed though right? After a launch, the counter 
counts up and does its thing, but then it'd need to be 
reset. For a single launch at a time you might be able 
to work (ie 1/4 mile) but I can't see how you'd 
determine when to restet the counter and start watching 
for it again.
If it were me, sensor would go on each wheel, fed into 
a frequency to voltage converter. Use a MCU with 4 A/D 
converter lines. Each register is read in and 
subtracted from each other at a continuous scan rate 
(probably as far as a bank of A/D's can finish a 
conversion- and HC/11 would be ideal since it can poll 
4 lines and interrupt as soon as all 4 are done). If 
the difference between any 2 registers exceeds the 
(user definable) max allowable difference, then power 
can be cut. Coupled with an accelerometer, a subroutine 
could be run when deceleration is detected to 
automatically adjust things like brake bias. But that's 
another topic.
Just some thoughts. Hopefully I don't cause poor Bruce 
another headache. ;)
-Kenny


Quoting Bruce <nacelp at bright.net>:

> 
> Way to simple to be a valid design <g>.
> Bruce
> 
> ----- Original Message ----- 
> From: "les" <lesd at earthlink.net>
> Subject: RE: [Diy_efi] Traction Control System
> (update 2)
> After conditioning the wheel sensors to a good
> square wave,
> use counter with two inputs, count up and count
> down.
> Have the front wheel be triggering count down,
> and the back
> wheel count up. With no slip, the counter will
> bounce around
> pretty much even, but as slip starts, the count
> will be going up.
> No need to measure pulse frequency, just a
> count, after a reset.
> -Les
> 
> 
> 
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> 



-Kenny
AKA Captain Bondo

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