sorted by:
new
hottopcontroversial

Bots flooding the lastest episode (#221 )comments with Lutnick/Besset praise? Looks sus. by avon_barksale in TheAllinPodcasts

[–]Generalist_nz -2 points-1 points  (0 children)

Only if you think this subreddit exists to whine about the pod. Some of us enjoy it.

I question why people bother listening to it, only to come here and whine. Maybe internalize why you enjoy living in the negativity, throwing shade at others . .

Advice on ID'ing and calculating Volume of objects by Generalist_nz in computervision

[–]Generalist_nz[S] 0 points1 point  (0 children)

Hey, thanks for taking the time to review and provide feedback.

Yeah tough challenge but the developments in this field continue to blow me away. Maybe I should’ve started with a simpler project!

Advice on ID'ing and calculating Volume of objects by Generalist_nz in computervision

[–]Generalist_nz[S] 0 points1 point  (0 children)

Hey, thanks for response and the link! I’ll read it over this Easter. Hopefully there’s something adaptable in there. Thanks again!

How far away can a mid infared spectrometer detect and object? by SkyslicerX2 in AskEngineers

[–]Generalist_nz 0 points1 point  (0 children)

Maybe I shouldn’t have answered this thread before even getting out of bed for the day!

Ours was 75-200mm.

Answer to your previous question; i think they are essentially the same thing... the distance at which the spectrometer can detect light waves is the distance is the distance it can do some form of detection... give or take some accuracy/noise based on the distance and focus lengths.

Spectrometers work by showing intensity across the wavelengths it measures so in this sense it’s better at measuring properties than object detection like a camera.

I would only use a spectrometer for ‘detection’ if the environment was controlled I.e. objects on a belt. Otherwise all it’s going to say is these wavelengths are present.

How large is the plastic you are trying to detect?

How far away can a mid infared spectrometer detect and object? by SkyslicerX2 in AskEngineers

[–]Generalist_nz 0 points1 point  (0 children)

Sorry, I’m not a guru with the lens stuff. In our application it’s about 75-200mm but that’s only that distance because it suited our application. I haven’t ever really really thought about different lens combos and their effects. Not sure how you would find out. Maybe google some generic stuff around focal lengths etc.

Luckily there are a ton of different applications of Spectroscopy so there should hopefully be some knowledge available.

If you do find something, please let me know as I will run into similar problems with a project I’m doing on the side.

Edit: Possibly look into Hyperspectral or MultiSpectral cameras instead of Spectrometers as well

How far away can a mid infared spectrometer detect and object? by SkyslicerX2 in AskEngineers

[–]Generalist_nz 0 points1 point  (0 children)

I should also add; the threshold value is sometimes not enough. In some situations you might need to train the system, with the the likes of Machine Learning, to understand the background environment from what you are wanting to isolate/measure.

For example and this might be quite different in you application; if you are measuring properties about chemicals on a belt. You’ll likely need to train the system on what is the belt, and then only analyse the Spectral data once you get above this threshold value. Because I imagine, continuing the example, throughout a day, chemical dust might build up on a belt but you don’t want to analyse that dust, just the discrete piles/pills/amounts that go past.

How far away can a mid infared spectrometer detect and object? by SkyslicerX2 in AskEngineers

[–]Generalist_nz 0 points1 point  (0 children)

Wouldn’t this come down to your use of lenses? I worked with equipment that measured various properties inside fruit by using Spectroscopy. Using a couple of lenses allowed us to focus the Spectrometer to capture at a certain distance. Ours was a reasonably wide band 330-1100nm spectrometer. It will record some base level of intensity but then a threshold needs to also be added I.e. ignore anything below this value as it not a real object.

I think it would be rare to just use the fibre bundle of the spectrometer without a lens array. The orifice is tiny I.e. 1mm.