Motor Vehicle Maintenance & Repair Asked by surajr on July 4, 2021
I have some Odometry data taken from a Volkswagen Passat which gives the position. This is calculated using wheel ticks and in addition, I also have data which gives me the number of wheel impulses at each wheel. But unfortunately, I’m confused as to what they actually are. My question is, what are wheel ticks and wheel impulses?
I wasn’t able to get much information online other than a whole set of references to wheel speed sensors and hence, posting on this site. Does that mean, wheel impulses give the wheel speed? (rpm)
A wheel speed sensor doesn't actually detect wheel speed. It just counts the notches on a toothed ring as it rotates. The brake computer interprets the data from the wheel speed sensor and uses it for the ABS, stability control and traction control and speedometer. The sensor itself doesn't calculate anything. If it's a "passive" sensor it just sends an analog voltage to the brake computer. If it's a passive sensor, it sends a square wave that the computer sees as a digital signal
Answered by user9181 on July 4, 2021
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