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I built a mmWave material classification radar (2025)

gauthier-lechevalier.com

41–50 of 61 posts

Re: I built a mmWave material classification radar (2025)

#41
Get this guy into YC. He knows how to do it, but not how to sell it.

This needs to join the families of devices that find wooden studs, electrical wiring, and plumbing. This is a general purpose technology. It can be reprogrammed to find other things. It should be in a blister-pack at Home Depot if it can be made cheaply, and in a hard case at Tool Town if it can't.

Re: I built a mmWave material classification radar (2025)

#42
post #41

Get this guy into YC. He knows how to do it, but not how to sell it. This needs to join the families of devices that find wooden studs, electrical wiring, and plumbing. This is a general purpose technology. It can be reprogrammed to find other things. It should be in a blister-pack at Home Depot if it can be made cheaply, and in a hard case at Tool Town if it can't.

Hi, thank you so much for your comment, the research was cool to do, but the market isn't there, and this is not something people really want (to retake YC's wording). You can have all the tech you want, but at the end of the day, the important thing is to have something that really brings value to your customer

Re: I built a mmWave material classification radar (2025)

#43
post #5

So thankful the author posted this. We often learn more from failure than success. Learning from the failures of others is how we can move forward. The lessons learned at the bottom of the article are gold.

Was this AI comment necessary? If you'd like to learn more about the module: https://www.ti.com/tool/IWRL6432BOOST Edit: maybe I am seeing AI everywhere! False positive. :-)

Your comment still has a lot of value, I didn't detail it in the article but this radar is usually used for autonomous vehicles, or person tracking.

Re: I built a mmWave material classification radar (2025)

#44
post #17

Kinda crazy that it worked but got no commercial interest. Hopefully someone suitable here sees it and can intervene Does it also work through other materials. i.e. through a drywall etc.

I can't say that I believe that it works. Like if you trained a machine learning algorithm to differentiate 10 samples of asbestos containing material from 10 non-asbestos containing materials I wouldn't believe it would work with all the many kinds of materials you would find out in the field in all the configurations that are out there. All that talk of how the electromagnetic properties of asbestos-containing mate…

Yes, it is half baked, we stopped because the quantity of data needed to continue was too expensive. Concerning the materials that were in the confusion matrix that you saw, it was only non asbestos materials (plexiglas doesn't ever contain asbestos for instance). The confusion matrix that you saw was made to prove you could identify different materials from one another, we never went as far as getting two same materials and one with asbestos minerals inside it.

About AI. Two things you learn in school : for centuries, we measured the world and modelled it using differential equations, and other mathematical concepts. Humans just have a certain limit to finding patterns, and this limit is covered by AI, which when you come to think of it is just a series of calculations to model statistical phenomenons.

Physics is a statistical phenomenon, therefore AI is now being used everywhere in physics to model the world.

Re: I built a mmWave material classification radar (2025)

#45

> however the big question to answer was : is the radar sensitive enough to tell the difference consistently between a material, and it's same counterpart with asbestos shards and at what concentration ? Unless I missed something, it seems the "POC" device still made no effort to address this, which is the core feature — it just demonstrated classifying some other common materials. If that's true then the conclusions…

The POC was made to classify materials, we couldn't get our hands on scientific grade materials that would allow to test our hypothesis, so we falled back to just identifying materials. We even went to identifying multilayer materials. You are totally right, this is not a true total POC, it's like the "level 1" of the POC needed to prove this was possible.

Re: I built a mmWave material classification radar (2025)

#46
post #42
post #41

Get this guy into YC. He knows how to do it, but not how to sell it. This needs to join the families of devices that find wooden studs, electrical wiring, and plumbing. This is a general purpose technology. It can be reprogrammed to find other things. It should be in a blister-pack at Home Depot if it can be made cheaply, and in a hard case at Tool Town if it can't.

Hi, thank you so much for your comment, the research was cool to do, but the market isn't there, and this is not something people really want (to retake YC's wording). You can have all the tech you want, but at the end of the day, the important thing is to have something that really brings value to your customer

I interpreted the comment as “give this guy some money and he will figure it out”. You have some serious skill, this just wasn’t the right idea.

Re: I built a mmWave material classification radar (2025)

#47
post #42
post #41

Get this guy into YC. He knows how to do it, but not how to sell it. This needs to join the families of devices that find wooden studs, electrical wiring, and plumbing. This is a general purpose technology. It can be reprogrammed to find other things. It should be in a blister-pack at Home Depot if it can be made cheaply, and in a hard case at Tool Town if it can't.

Hi, thank you so much for your comment, the research was cool to do, but the market isn't there, and this is not something people really want (to retake YC's wording). You can have all the tech you want, but at the end of the day, the important thing is to have something that really brings value to your customer

Don't listen to YC. Reach out to Bosch.

Re: I built a mmWave material classification radar (2025)

#48
post #41

Get this guy into YC. He knows how to do it, but not how to sell it. This needs to join the families of devices that find wooden studs, electrical wiring, and plumbing. This is a general purpose technology. It can be reprogrammed to find other things. It should be in a blister-pack at Home Depot if it can be made cheaply, and in a hard case at Tool Town if it can't.

Is there anything that reliably finds wooden studs in walls? I've tried a whole range of different stud finders and all of them are at a level of reliability roughly on par with the Psychic Friends Network: "I think there may be something there... or is it over there? No, perhaps there".

In the end the most reliable way of locating studs I found was going outside, measuring the distance between the nails in the exterior cladding, and then using those measurements on the corresponding inside wall.

Re: I built a mmWave material classification radar (2025)

#49
post #32

> I live in Europe, where asbestos is a huge and common pain across every country here. That stuff fills walls, and requires people to come at your place to tell you if you have asbestos contaminated materials in your building. If so, you might have been breathing poison since you were a kid. Asbestos doesn't work like that. If you don't touch it, you're fine. You can live your whole life in asbestos building and be…

It’s not that straightforward. Asbestos comes in many forms with varying friability. Mixed into linoleum floor tiles? Probably not a big deal. Mixed into wall plaster in a poorly maintained rental unit? A hell of a lot riskier. And a lot of the buildings that have asbestos-wrapped pipes, for example, have cramped utility crawl spaces and basements that can make it difficult to avoid. If you’ve got asbestos hidden beh…

The single largest use of asbestos here was in fibre cement cladding, which is fine if you don't decide to cut or drill into it. In fact given that it's nearly indestructible and will wear most saw blades and drills down to a stump in about 5cm of cutting, you couldn't cut/drill it even if you wanted to. Neighbour of ours wanted to put in a serving hatch outside his kitchen and after about 20 minutes of attacking it with all sorts of devices gave up and decided they'd just pass stuff out through the window instead.

Re: I built a mmWave material classification radar (2025)

#50
post #42
post #41

Get this guy into YC. He knows how to do it, but not how to sell it. This needs to join the families of devices that find wooden studs, electrical wiring, and plumbing. This is a general purpose technology. It can be reprogrammed to find other things. It should be in a blister-pack at Home Depot if it can be made cheaply, and in a hard case at Tool Town if it can't.

Hi, thank you so much for your comment, the research was cool to do, but the market isn't there, and this is not something people really want (to retake YC's wording). You can have all the tech you want, but at the end of the day, the important thing is to have something that really brings value to your customer

there is a dutch DIY reddit group and the most common daily post is: Is this asbestos? if there would be a 20-50 euro device to confirm this im sure plenty would buy it
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