Super interesting. I had plans to do something similar with my roaster but life got in the way as always. What are you roasting on? We just purchased a venta18 and my goal this fall is to get it hooked up with PID. Something like this could be very useful for tuning
Show HN: A Digital Twin of my coffee roaster that runs in the browser
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Re: Show HN: A Digital Twin of my coffee roaster that runs in the browser
#22cool
Re: Show HN: A Digital Twin of my coffee roaster that runs in the browser
#23As someone doing PhD in digital twins, I’m obliged to point out that this is a simulation, not a digital twin, as there is no two way data interchange between the models. Having said that, this is extremely cool and I love it.
Re: Show HN: A Digital Twin of my coffee roaster that runs in the browser
#24[dead]
Re: Show HN: A Digital Twin of my coffee roaster that runs in the browser
#25[dead]
Re: Show HN: A Digital Twin of my coffee roaster that runs in the browser
#26As someone doing PhD in digital twins, I’m obliged to point out that this is a simulation, not a digital twin, as there is no two way data interchange between the models. Having said that, this is extremely cool and I love it.
I didn't know digital twin had an official definition. Could you please share a bit more on what makes a simulation a digital twin?
Re: Show HN: A Digital Twin of my coffee roaster that runs in the browser
#27As someone doing PhD in digital twins, I’m obliged to point out that this is a simulation, not a digital twin, as there is no two way data interchange between the models. Having said that, this is extremely cool and I love it.
I didn't know digital twin had an official definition. Could you please share a bit more on what makes a simulation a digital twin?
Digital twins are bidirectional.
Change something in real life, thebdigital twin changes.
Adjust something on the twin, and so adjusts the real machine.
Re: Show HN: A Digital Twin of my coffee roaster that runs in the browser
#28As someone doing PhD in digital twins, I’m obliged to point out that this is a simulation, not a digital twin, as there is no two way data interchange between the models. Having said that, this is extremely cool and I love it.
I didn't know digital twin had an official definition. Could you please share a bit more on what makes a simulation a digital twin?
From Wikipedia:
> A digital twin is a digital model of an intended or actual real-world physical product, system, or process (a physical twin) that serves as a digital counterpart of it for purposes such as simulation, integration, testing, monitoring, and maintenance.
> A digital twin is "a set of adaptive models that emulate the behaviour of a physical system in a virtual system getting real time data to update itself along its life cycle. The digital twin replicates the physical system to predict failures and opportunities for changing, to prescribe real time actions for optimizing and/or mitigating unexpected events observing and evaluating the operating profile system."
Re: Show HN: A Digital Twin of my coffee roaster that runs in the browser
#29As someone doing PhD in digital twins, I’m obliged to point out that this is a simulation, not a digital twin, as there is no two way data interchange between the models. Having said that, this is extremely cool and I love it.
I didn't know digital twin had an official definition. Could you please share a bit more on what makes a simulation a digital twin?
A 'digital twin' is a model that evolves over the lifetime of a physical asset. So if the state of the real device changes, so does the model (data assimilation). Likewise, one can use the model for control/planning/"what-if" scenarios. This is the bi-directional information flow that's being mentioned.
So what I'm showing on the website is just the model part. I'm not a fan of exposing my hardware in a public demo (the digital twin part), but the idea is that this model evolves with the roaster during the roast (data assimilation) and can help the operator guide the roaster to a desired end goal (e.g. medium roast along some profile or with minimal energy usage).
Re: Show HN: A Digital Twin of my coffee roaster that runs in the browser
#30This takes me back.
I used to run a coffee roastery and roasted several thousand batches. This is pretty much how it works. I spent hours of trying to match those curves to the target profile.
Back in the day we had software called Artisan and a few probes inside the machine. It would have benefited of from having much more data being recorded.
For example: environment humidity, the number of the batch (machine itself heats, so batch 1 of the day is very different than batch 11), bean temp and moisture before going in, actions the roaster takes etc.
It seems like I have forgotten some nuances.