Display Signal over angle of Crankshaft

[Ruffy_LR]

Hi there,

I'm currently working on my bachelor thesis and I want to display the combustion pressure over the crankshaft angle, not overtime.

In LabView I generated a crankshaft angle signal by the signal of the crankshaft sensor. The result is a signal increment by 6° up to 720°, for every rotation of the engine (see attachment). 

Now I want to use this signal as X-axes for my combustion pressure signal.

The problem is that my current resulting X-axe stops at 720° and overlaps the following Y-values.  

In attachment is a sketch of want I want to gain. 

I'm open to resolutions in LabView or DIAdem. 

May you can help me 🙂 

Thanks 

[vardanium]

What Hardware do you use for angle detection? 
Also, you can attach your code, will have a look, make suggestions!

[Brad_Turpin]

Hi Ruffy_LR,

Try running your KWW_t channel through the "Phase Unwrap" function in the "Channel Functions" palette of DIAdem ANALYSIS.  I'm including a picture of the parametrization that looks like it does what you want.  This will create a new channel that keeps going "past" 720 degrees, or you can check the checkbox in the bottom left of the ANALYSIS dialog to overwrite the wraparound values in the existing channel with the unwrapped ones.

Regards,

Brad Turpin

Principal Technical Support Engineer

NI