Wheel speed sensor question.

Hrdbill
Posts: 16
Joined: Wed Feb 19, 2014 9:35 pm

Wheel speed sensor question.

Postby Hrdbill » Tue Feb 07, 2017 10:25 pm

Wheel speed sensor question.

I'm looking to record wheel speed.
Can this be done with a 75mm ABS ring on the driveshaft (I have a 26 and 48 tooth option available) or from what i've read, will this generate too many pulses per mile?

Kind regards,
Bill

Support
Posts: 353
Joined: Mon Nov 21, 2005 4:09 pm

Re: Wheel speed sensor question.

Postby Support » Wed Feb 08, 2017 9:59 am

Hi there,

You are indeed correct, due to the number of teeth present on the ABS ring, the number of pulses will be too high for any of our dash displays to measure directly.

In order to use the signal from an ABS ring, we have an additional piece of hardware called the VRS conditioner. This allows the signal from the ABS ring to be properly smoothed to a consistent square wave, and also divides the number of pulses from the ABS ring, to allow the signal to be fed into our displays and loggers. Please see the below link for more information.

http://www.race-technology.com/gb/racin ... onditioner

Kind Regards,
RT Support (SK)
______________________________
Posted by Race Technology Support

Hrdbill
Posts: 16
Joined: Wed Feb 19, 2014 9:35 pm

Re: Wheel speed sensor question.

Postby Hrdbill » Thu Feb 09, 2017 9:53 pm

Ok, thanks for your help.
So in theory it would be possible to run an ABS ring with all but 1 (or two opposite) tooth/teeth removed? It is not needed for ABS/Traction control
Is there a minimum target width for the tooth?
As per your Knowledge base.

Reference Target Dimensions
Tooth Height: .200 in. (5,06mm) min.
Tooth Width: .100 in (2,54mm) min
Tooth Spacing: .400 in. (10,16mm)
Target Thickness: .250 in. (6,35)

Alternatively, i'll look to take a trigger from an actual wheel sensor.
Thanks.

Hrdbill
Posts: 16
Joined: Wed Feb 19, 2014 9:35 pm

Re: Wheel speed sensor question.

Postby Hrdbill » Thu Feb 16, 2017 2:35 pm

Any thoughts?
75mm circumference with 1 or 2 teeth.


Thank you.

peterguk
Posts: 61
Joined: Mon Oct 27, 2014 10:19 pm

Re: Wheel speed sensor question.

Postby peterguk » Thu Feb 16, 2017 11:22 pm

IMHO, i think you'll find the duty cycle of the teeth way too small.


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