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Wheel speed signal and target shape
Posted: Mon Jan 11, 2021 4:31 pm
by Arno
Hi everybody,
I'm working on the mounting of my wheel speed sensor and target and have some questions
Can you confirm what is the best expected signal for accuracy between 1,2 and 3 ? and the best ratio traveled distance / tooth (or frequency) for launch control's PID according to your experience ?
- Signal.png (4.34 KiB) Viewed 5570 times
Thanks for your help.
Re: Wheel speed signal and target shape
Posted: Tue Jan 12, 2021 3:37 am
by Alex DTA
1 is best.
2 should be fine.
3 is most likely to cause issues, but it depends on actual duty percentage.
All 3 should work unless you make the tooth or gap too small to be read by the sensor.
Re: Wheel speed signal and target shape
Posted: Tue Jan 12, 2021 11:54 am
by Arno
It will be first in this case.
With a 16 teeh target it give me a sensor frequency from 0 to 175 Hz for first gear top speed. Is it fine for the launch control loop ?
thanks
Re: Wheel speed signal and target shape
Posted: Wed Jan 13, 2021 3:34 am
by Alex DTA
Yes, that will be fine.
Re: Wheel speed signal and target shape
Posted: Wed Jan 13, 2021 1:37 pm
by SMR
16 pulses per revolution is a pretty good resolution. I only have 6 which means the wheel has moved almost 300mm between pulses; It does work but more pulses would be better.
Re: Wheel speed signal and target shape
Posted: Wed Jan 13, 2021 3:26 pm
by Arno
Thanks
I need to make some drawings now
Re: Wheel speed signal and target shape
Posted: Sat Jan 16, 2021 10:36 am
by Gadgetman
I'm using twenty pulses/revolution, with front targets mounted inside the brake bells.
https://photos.google.com/share/AF1QipM ... tyVE1BaDNB
Re: Wheel speed signal and target shape
Posted: Tue Jan 19, 2021 12:02 pm
by Arno
Nice idea. Thanks for sharing.
No problem with the brake disc temperature and the sensor ?
Re: Wheel speed signal and target shape
Posted: Tue Jan 19, 2021 7:33 pm
by aleksanderk
This is good info. I plan to get ABS struts from a newer model of my car and use that.
Gadgetman: Smart setup