Wheel speed signal and target shape

Discuss which Sensors work best with these ECUs and share how you are using inputs and outputs
Post Reply
Arno
Posts: 9
Joined: Tue Sep 29, 2020 11:14 am
ECU Model: S40 Pro
Firmware Version: 89.00

Wheel speed signal and target shape

Post 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
Signal.png (4.34 KiB) Viewed 556 times
Thanks for your help.
Alex DTA
Posts: 1489
Joined: Fri Feb 28, 2014 1:03 pm
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79

Re: Wheel speed signal and target shape

Post 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.
Arno
Posts: 9
Joined: Tue Sep 29, 2020 11:14 am
ECU Model: S40 Pro
Firmware Version: 89.00

Re: Wheel speed signal and target shape

Post 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
Alex DTA
Posts: 1489
Joined: Fri Feb 28, 2014 1:03 pm
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79

Re: Wheel speed signal and target shape

Post by Alex DTA »

Yes, that will be fine.
SMR
Posts: 119
Joined: Tue Jan 16, 2018 9:38 am
ECU Model: S100 Pro
Distributor: DTA
Location: Aberdeen

Re: Wheel speed signal and target shape

Post 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.
Arno
Posts: 9
Joined: Tue Sep 29, 2020 11:14 am
ECU Model: S40 Pro
Firmware Version: 89.00

Re: Wheel speed signal and target shape

Post by Arno »

Thanks

I need to make some drawings now ;-)
Gadgetman
Posts: 17
Joined: Sat Sep 03, 2011 9:29 am
ECU Model: S80 Pro

Re: Wheel speed signal and target shape

Post by Gadgetman »

I'm using twenty pulses/revolution, with front targets mounted inside the brake bells.
https://photos.google.com/share/AF1QipM ... tyVE1BaDNB
Arno
Posts: 9
Joined: Tue Sep 29, 2020 11:14 am
ECU Model: S40 Pro
Firmware Version: 89.00

Re: Wheel speed signal and target shape

Post by Arno »

Nice idea. Thanks for sharing.

No problem with the brake disc temperature and the sensor ?
aleksanderk
Posts: 52
Joined: Fri Feb 01, 2019 4:36 pm
ECU Model: S80 Pro
Firmware Version: 6500

Re: Wheel speed signal and target shape

Post 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 :)
Post Reply