DetonationDetection/LogAnalysis (2006-03-16 04:43:08)

Fero's knock logging (Fknock1.log), kd = knock_val - noise_val and kr = knock_val/noise_val.

kd.png

kr.png

The same plots, but plotted by igncount (eg. cylinder):

fknock_hist_diff.png

fknock_hist_ratio.png

The major problem with the logs is the absence of a thrustful indication of whether there are real knocking or just noise. What can we do about that?

I tested a very simple method in the perl script bin/knock_analysis.pl for determining if knocking is present in the samples: (kr > k1 && kd > k2 || kd > k3), however without knowledge of when knocking actually occurs, it involves a lot of guessing.

Ex, is this a knock? (I think, and a bad one): adv=9.75 rpm=5084 map=149 knock_val=315 noise_val=156 kd=159 kr=2.019

Todo's: