[Diy_efi] RE: [offlist] Strain gauge on engine mounts

[J]

>>If you had a 2-channel O-scope hooked up to both sensors you would easily
see the wave forms shift apart as torque was applied.  I'm sure there are
circuits out there that can create a difference signal based on the phase
difference.  Then you just relate the difference signal to specific torque
values.


Easy enough.  Just run the two identical squarewave signals through an XOR 
logic gate, and poof!  You have a third squarewave signal with a duty cycle 
proportional to the phase difference of the first two, up to 180* phase 
difference (assuming 50% duty cycle on the reluctors.)