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I've slowly been adding inputs to my data logger for my track R32, and today I finally got around to probing the factory steering angle sensor to see if that could be used.
The factory manual hicas diagnostics and wiring diagrams are fairly helpful; the sensor has two "angle" outputs 0-5v outputs and a third "centre" 0-5v output.
Sounds promising, sadly the two "angle" outputs aren't an analog voltage between 0-5v in proportion to steering angle they output alternating 0 or 5v as the angle changes, one output is alternates about twice the rate of the other. I guess the hicas brain counts the steps away from the dead center point on each of the two alternating outputs and determines the current position. I don't think the logger I have can be configured to use this.
So it looks like I'll be making something up. There seem to be a few ways;
1.Rotary potentiometers attached by pulleys or gears to the steering column
2.String pots either wound round the column or stretched between the rack and the tie rod ends.
3.Linear pots attached to the rack and the tie rod end.
You can buy "kits" for 1 and 2 from AIM and Race Technology for £100-£155 - but frankly they still need a lot of work to fit and are basically a £10 pot a generic bracket and a couple of pulleys.
So,
a)does anyone know something more about how to interpret the signal from the factory sensor that I'm missing that might allow be to use it with my logger?
b)what diy solutions have people come up with (doesn't have to be in a Skyline - I understand this is race car stuff and very few are raced seriously in the UK)?
The factory manual hicas diagnostics and wiring diagrams are fairly helpful; the sensor has two "angle" outputs 0-5v outputs and a third "centre" 0-5v output.
Sounds promising, sadly the two "angle" outputs aren't an analog voltage between 0-5v in proportion to steering angle they output alternating 0 or 5v as the angle changes, one output is alternates about twice the rate of the other. I guess the hicas brain counts the steps away from the dead center point on each of the two alternating outputs and determines the current position. I don't think the logger I have can be configured to use this.
So it looks like I'll be making something up. There seem to be a few ways;
1.Rotary potentiometers attached by pulleys or gears to the steering column
2.String pots either wound round the column or stretched between the rack and the tie rod ends.
3.Linear pots attached to the rack and the tie rod end.
You can buy "kits" for 1 and 2 from AIM and Race Technology for £100-£155 - but frankly they still need a lot of work to fit and are basically a £10 pot a generic bracket and a couple of pulleys.
So,
a)does anyone know something more about how to interpret the signal from the factory sensor that I'm missing that might allow be to use it with my logger?
b)what diy solutions have people come up with (doesn't have to be in a Skyline - I understand this is race car stuff and very few are raced seriously in the UK)?