VEMS Home Products Documentation Wiki Webstore
WikiHome ProjectPage DocsPage UnderDevelopment MembersPage SiteIndex RecentChanges Preferences
History of MembersPage/DavidBlades/SenTest
Older Newer
2012-05-21 22:00:37 . . . . 87.115.140.6 [Wheel speed sensor testing]
2007-07-16 22:31:40 . . . . 81-178-93-141.dsl.pipex.com [Added question about knock sensor]
2006-07-31 20:25:46 . . . . parent-proxy-msd5-nat.zqwdrqsz.com [EGT probe added]
2006-07-17 19:15:03 . . . . catv-5665af55.catv.broadband.hu [knock hint]
2006-07-17 15:30:04 . . . . 20.133.0.13 [Knock sensor section added - couple of questions.]
2006-06-11 18:55:51 . . . . MembersPage/DavidBlades [Moved problem to its own page]
2006-06-02 14:35:42 . . . . 20.133.0.13 [Additional progress notes. (not much!!)]
2006-06-02 04:46:11 . . . . MembersPage/MarcellGal [hints]
2006-05-29 05:56:34 . . . . 81-178-88-170.dsl.pipex.com [More updates on problems]
2006-05-29 05:44:07 . . . . 81-178-88-170.dsl.pipex.com [More updates on my reg problem and thanks!]
2006-05-28 22:02:22 . . . . MembersPage/MarcellGal [best user project doc award: granted assembled v3.x]
2006-05-27 06:41:18 . . . . 81-179-69-60.dsl.pipex.com [Think the A to D has died. Replace board time? Suggestions please!]
2006-05-26 14:33:51 . . . . 20.133.0.13 [More info on latest problem. Still need help! Thanks.]
2006-05-26 05:47:31 . . . . MembersPage/DavidBlades [Show-stopper problem? (last item on page) Please help!!]
2006-05-02 15:56:42 . . . . MembersPage/MarcellGal [C5 value]
2006-04-30 20:04:34 . . . . MembersPage/DavidBlades [Fixed typo on "What is capacitor C5 value Q"]
2006-04-30 19:47:06 . . . . MembersPage/DavidBlades [AREF fixed - what should component C5 be?]
2006-04-28 23:02:02 . . . . MembersPage/MarcellGal [aref and precompiled curve hint]
2006-04-25 20:44:32 . . . . parent-proxy-msd5-nat.zqwdrqsz.com [Comments about heat soak]
2006-03-20 18:06:02 . . . . DavidBlades
2006-03-16 07:45:13 . . . . MembersPage/DavidBlades [Added a new NTC issue - it worked before. Why not now?]
2006-02-27 22:39:53 . . . . MembersPage/DavidBlades
2006-02-27 22:39:31 . . . . MembersPage/DavidBlades [more thoughts on dual widebands]
2006-02-25 08:41:23 . . . . MembersPage/MarcellGal [2nd channel wbo2 notes]
2006-02-24 17:25:17 . . . . MembersPage/DavidBlades [Q about 2 widebands.]
2006-02-02 18:29:01 . . . . MembersPage/MarcellGal [rcal note]
2006-01-29 07:24:38 . . . . 81-178-222-139.dsl.pipex.com [Updates on progress]
2006-01-26 22:11:41 . . . . MembersPage/DaveBrul [explained rcal n/c]
2006-01-26 21:53:41 . . . . MembersPage/DavidBlades [Wideband wiring question - cal resistor?]
2006-01-16 20:37:50 . . . . MembersPage/DavidBlades [update on progress and wideband question]
2006-01-16 20:36:47 . . . . MembersPage/DavidBlades
2006-01-11 20:55:46 . . . . MembersPage/DavidBlades

Changes by last author:

Added:
----
Added:
21/5/2012 - Wheel speed sensor

I have finally got around to making use of the wheel speed sensor. It is being used to control the electric power steering assistance and also being passed to the VEMS ECU for logging.

I have used an AVR tiny45 to provide a frequency shifter for the EPAS system, and passed the speed signal through an amplifier and protection diode etc to the ECU.

My problem is that the ECU gets confused when the speed signal is greater than 1096 Hz. This is about 55km/h on my car, so not all that useful. Is this a known limit for the speed signal? (Note that the divider logic is not a useful fix to this because it divides after the counter) If so, I'll produce an additional frequency shifted output for the ECU from the AVR chip.

Thanks

----