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1. Re: ABS experience (still long) (score: 1): Author: Chris Kotting <ckotting@iwaynet.net>; Date: Fri, 21 Jan 2000 08:28:39 -0500; Aha! You've discovered ABS's weak point. Allow me to ask a question: How does ABS know that a wheel is locked? Think about this for a second before reading the next line. Ready for the answer? By co; /html/mgs/2000-01/msg01116.html (10,994 bytes)
2. Re: ABS experience (still long) (score: 1): Author: Matt Pringle <pringlmm@mcmaster.ca>; Date: Fri, 21 Jan 2000 08:43:47 -0500; Actually sensing the difference between being stopped and skidding with all wheels locked is very simple and I'd be very surprised if they don't do it already. When you're skidding, you're still slow; /html/mgs/2000-01/msg01118.html (8,292 bytes)
3. Re: ABS experience (still long) (score: 1): Author: "James H. Nazarian, Ph.D." <microdoc@apk.net>; Date: Fri, 21 Jan 2000 08:45:26 -0500; Good Points Chris. There are already many simple schemes that can perform the required motion detection duties. Sensor technology is a highly advanced field with a multitude of solutions offered. Jim; /html/mgs/2000-01/msg01119.html (11,910 bytes)
4. Re: ABS experience (still long) (score: 1): Author: Bob Howard <mgbob@juno.com>; Date: Fri, 21 Jan 2000 10:12:41 -0500; I can follow your logic if the skid is on pavement where at least one wheel has good grip. If all four wheels were on ice, how would it sense deceleration? Bob On Fri, 21 Jan 2000 08:43:47 -0500 Mat; /html/mgs/2000-01/msg01128.html (8,708 bytes)
5. Re: ABS experience (still long) (score: 1): Author: Matt Pringle <pringlmm@mcmaster.ca>; Date: Fri, 21 Jan 2000 10:45:30 -0500; Even on ice the car will be slowing (albeit extremely slowly). Acceleromters can be extremely sensitive. Matt; /html/mgs/2000-01/msg01130.html (9,189 bytes)
6. Re: ABS experience (still long) (score: 1): Author: Max Heim <mvheim@studiolimage.com>; Date: Fri, 21 Jan 2000 10:40:43 -0800; This is all very interesting. The question is, do any current ABS systems use accelerometers? If so, which ones? (sorry to butt in) Matt Pringle had this to say: -- Max Heim '66 MGB GHN3L76149 If you; /html/mgs/2000-01/msg01159.html (9,648 bytes)
7. Re: ABS experience (still long) (score: 1): Author: Adam Arabian <arabian@allegronet.com>; Date: Fri, 21 Jan 2000 13:52:17 +0000; I knew being a grad student in michigan would come in handy someday.... A number of cars use accelerometers, but NOT for axial deceleration measurement generally. They are for lateral acceleration -; /html/mgs/2000-01/msg01160.html (11,009 bytes)
8. Re: ABS experience (still long) (score: 1): Author: REwald9535@aol.com; Date: Fri, 21 Jan 2000 15:22:53 EST; OK time for ABS 101 class Wrong, the answer is it can and does know the difference between a stopped car and one that is moving. How does it do this you ask. Simple the system calculates the G force; /html/mgs/2000-01/msg01167.html (10,437 bytes)
9. Re: ABS experience (still long) (score: 1): Author: REwald9535@aol.com; Date: Fri, 21 Jan 2000 15:52:23 EST; As far as I know no ABS system uses accelerometers. the wheel speed sensor uses a toothed wheel and some type of pickup (magnetic is the most common) A magentic sensor generates a sine wave and the s; /html/mgs/2000-01/msg01169.html (8,730 bytes)
10. Re: ABS experience (still long) (score: 1): Author: Adam Arabian <arabian@allegronet.com>; Date: Fri, 21 Jan 2000 16:19:05 +0000; Sorry - noisy in the signal conditioning sense, not in the 'clackity clack' sense. Accelerometers generally have a signal 'noise' associated with them, as do all measurement devices. My understanding; /html/mgs/2000-01/msg01171.html (9,713 bytes)
11. Re: ABS experience (still long) (score: 1): Author: Adam Arabian <arabian@allegronet.com>; Date: Fri, 21 Jan 2000 16:29:49 +0000; Ok, This is my lesson for the day to read responses better. Obviously I was answering completely the wrong question from Mr. Ewald. Here is a better response: The use of accelerometers in automotive; /html/mgs/2000-01/msg01175.html (10,042 bytes)

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