Hi-resolution Crank angle sensor

[Andrew Dalgleish]

On Wednesday, 28 February 1996 18:06, owner-diy_efi-outgoing wrote:
> >>Yes, if you can get a 200 tooth wheel.
> >
> >Not necessary. Add one sensor instead.
> >
> >
> >  *     x
> >  _   _   _   _   _   _
> >_/ \_/ \_/ \_/ \_/ \_/ \_
>
>
> This doesn't make sense. For every peak there will be a trough and each
> sensor will detect the same thing.
>
> >And yes, the starter gear on the flywheel is a good source,
> >in most cases around 150 teeth, and (hopefully) no missing tooth.
>
> That makes much more sense. Why didn't I think of it :)
>
> Peter Wales
> President Superchips Inc
> Chairman Superchips Ltd        "Timing is everything"
> Superchips home page with all the answers http://www.superchips.com
>
>


Ever seen Vernier calipers?
Quadrature encoders use the same principal.
For one extra sensor the spacing should be at (n +/- 0.25) tooth
++++++++++++++++
 ----____----____ Sensor 1
 --____----____-- Sensor 2
__--__--__--__-- Exclusive-or
++++++++++++++++
Regards,
Andrew Dalgleish
Axon Research, Pty Ltd
6 Wallace Ave,
Toorak, VIC
3142
AUSTRALIA
Tel +61-3-9826-5538
Fax +61-3-9824-0083