Knock monitoring whit data logger

I was wondering if anyone has recorded raw knock data with a data logger?

I've already tried it as an analog recording which is in the range of mV, while in some parts it could be expected that knocking occurs, but maybe it would be best to filter out the noise through the math channel.

I am attaching photos of what the raw analog data of my logger's knock sensor looks like. (Frequency 1000Hz)

Does anyone have any tips and tricks on how to get relevant values out of it?

When you're trying to measure signals resonating at 6kHz and above you will need to sample at twice that frequency. 1000 Hz isn't close. This is why knock monitoring is done with specialized chips / circuits and reported so that it can be logged at a more reasonable rate (100 hz or less).

Also, you only want to look at the knock signal within a specific window of crankshaft position with each cylinder. Raw logging at 1000 hz (1ms) won't get you the resolution you need.

Thanks for the information and can you possibly advise me on a 2-channel knock detection scanner that sends data preferably via CAN to the data logger

But overall, I'm thinking, I'm interested in where you got the resonance value of 6kHz. When I calculate, as an example I will give e.g. with an inline 4-cylinder engine at 10000rpm, ignition occurs every 3ms, which is approx. 333 times per second, and when measuring voltage jumps, the sampling frequency of 1000Hz must be sufficient

Something like a Plex Knock Monitor can process the knock sensor signal and send the result over the CAN bus.

https://www.plex-tuning.com/products/plex-knock-monitor-2/

https://www.plex-tuning.com/products/plex-knock-monitor-v3/

Depending on the diameter of the bore, the natural frequency will change as it is related to the speed of sound.

Knock Frequency = 900,000/(π×0.5 ×cylinder bore diameter )

What David is talking about is the frequency of the sound of the knock event, not how often it occurs.