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Engineers develop bio-machine nose that can “sniff” and classify odors

Published

7 years ago

October 29, 2018

Engineers from Brown University in Rhode Island have invented a small, low-cost sensor device which is able to classify odors using input from a mimicked “sniffing” action. It’s called TruffleBot, and it’s here to raise the bar on electronic “noses”. It also works with Raspberry Pi, an inexpensive mini-computer popular with electronics hobbyists, students, and others in the “maker” crowd.

Generally, an electronic nose is a device comprising several chemical sensors whose results are fed through a pattern-recognition system to identify odors. In traditional devices, the chemical responses alone are used for classification. The engineers behind this invention, however, decided to incorporate non-chemical data to account for the mechanics of the smell process used in nature for a better result. Their experiment proved successful with an approximate 95-98% rate of accuracy in identification compared to about 80-90% accuracy with the chemical sensors alone.

According to the inventors’ published paper, the guiding knowledge that made TruffleBot so useful in odor detection was this: Different smells have different impacts on the air around them, and measuring the variations enables more accurate identification. Did you know that beer odor decreases air pressure and increases temperature? The changes are slight, but TruffleBot can sense them.

This is where the “sniffing” comes in. The device uses air pumped through four obstructed pathways before sending it through chemical and non-chemical sensors. Odors impact the air surrounding them, and the movement of the air through obstacles (“sniffing”) enables the odors’ impact to be more accurately measured.

So, where exactly would one need an electronic nose? Everywhere. Devices with the chemical sensing ability are being used in agriculture, military, and commercial applications to identify all sorts environmental data. Essentially, electronic noses are useful in any industrial application that has odor involved.

Nasal Marketing

Did you know that it’s possible to trademark a smell in the United States? It’s not easy to accomplish given the somewhat difficult requirements to meet, but a few such things exist. The fact that Play-Doh, a product whose smell is probably one of its most distinct features, was granted a trademark for the scent only this year is testament to the difficulty of obtaining such a mark. However, the fact that some companies have found enough incentive to make sure only their company can give your nose a particular chemical experience tells a lot about that sense’s importance from a marketing perspective.

On one hand, utilizing smell in marketing might seem a little manipulative. After all, creating an air freshener that reminds someone of a beloved, deceased relative on purpose might not seem like a particularly ethical way to target their money. On the other hand (or bigger picture), however, the motivation for marketers to use scent as a tool involves a sort of “chicken or the egg” question.

To summarize part of an article in the journal Sensors on the role scent plays in society and commerce, the aroma of products has a direct impact on their appeal to customers and thus, the success of the product. In fact, a change in a product’s formula that impacts its smell can, and often has had, devastating sales results. In other words, it’s not enough for a company to create a good product; it has to be a good smelling product.

Hacking the Human Nose

It’s probably no surprise that the commercial industry has categorized consumer preferences when it comes to smells. As the first sense fully developed after birth, our noses link us to things like memories, emotions, and chemical communication (think pheromones). Is it any wonder, then, why businesses might be interested in the functionality of the organ that is doing the receiving?

Turns out, there’s an enormous amount of science behind “hacking” a nose. Identifying smells is more than just categorizing chemical mixtures as “floral” or “masculine”. The multitude of chemical combinations available generates such a vast amount of data that scientists have implemented computer neural networks to analyze and classify it. Also, the actual mechanics of smelling something impacts the way the smell is received and processed in the brain. Computers and scientific instruments come in handy there as well. To really get to the core of human response to an aroma, lots of non-human tools are needed, and this is essentially where the TruffleBot fits in the greater realm of “olfactory” science.

More Than Just Your Money

Perhaps one of the most innovative uses found for electronic noses is in disease research. One of the limitations of human smell is its overall weakness. A dog’s sense of smell is around 40 times better than a human’s, and a bear’s is a whopping 2,100 times superior to ours. That said, when researchers learned that certain diseases give off certain odors, the human nose wasn’t exactly the first choice to utilize in sensing them.

An electronic nose makes good use of the simple fact that organic matter releases chemicals into the air. For example, when a plant has been impacted by a fungus, the changes brought on in the plant’s structure release what’s called “volatile organic compounds” (VOCs). These VOCs can be detected by the sensors in an electronic nose and then provide information on the type of disease present without destroying the plants being tested.

Humans have some amazing things to gain from electronic noses, too. Using sensors to process odors from VOCs, things like digestive diseases, kidney diseases, and diabetes, among many others, are all receiving scientific attention for non-invasive diagnosis by these types of devices. With improvements brought on by inventions like TruffleBot, especially combined with its low-cost and resulting accessibility, a future involving remote diagnoses for any number of illnesses and diseases seems more possible every day.

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Dacia J. Ferris

Accidental computer geek, fascinated by most history and the multiplanetary future on its way. Quite keen on the democratization of space. | It's pronounced day-sha, but I answer to almost any variation thereof.

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Tesla Full Self-Driving impressions after three weeks of ownership

I will be fair and tell you all what I truly enjoy, as well as what frustrates me about Full Self-Driving.

Published

5 hours ago

September 18, 2025

Joey Klender

Credit: Joey Klender

Tesla Full Self-Driving is amongst the most robust and refined semi-autonomous driver assistance systems on the market today. After three weeks of ownership, I’ve driven around half of my miles using it, and my impressions put me right in the middle of it being very impressive and needing some work.

Of course, if it were perfect, it would be driving us all around all the time while we sleep, scroll our phones, or watch movies in the cockpit. It does a lot of things very well, and it has managed to impress everyone I’ve put in the passenger’s seat.

However, there are some things that are obvious pain points, situations that need improvement, and areas where I believe it has a long way to go. Regardless, these are things I have noticed, and they may differ from your opinions based on your location or traffic situations.

Tesla Model Y ownership two weeks in: what I love and what I don’t

I’ll try to keep it pretty even and just highlight the things that are truly noticeable with Full Self-Driving. I won’t be too critical of the things that it is bad at, and I won’t try to give it too much of a pat on the back.

I will be fair and tell you all what I truly enjoy, as well as what frustrates me about it.

*Disclaimer: These Full Self-Driving examples were in use with v13.2.9.

Where Tesla Full Self-Driving is Great

Highway Driving

I have yet to have a critical intervention of any kind on the highway. I have driven on easy highways like Rt. 30 in Pennsylvania, and I have driven on congested four-lane parking lots like I-695 near Baltimore, Maryland.

Tesla FSD does a tremendous job on all of it. I usually use the “Hurry” setting of FSD with an offset of between 25 and 40 percent, depending on what I’m doing and where I’m going. Sometimes, I want to push it a bit, and at other times, I’m okay with taking my time and enjoying the drive.

I find the driving style of Hurry is more similar to the traffic around me than the Standard, which tends to drive like an 80-year-old on their way to Bingo.

It does a great job of being considerate, maintaining an appropriate rate of travel, getting over for cars that are tailgating in the left lane after passing traffic, and it always is where it needs to be when it needs to be there.

Taking the Stress Out of Driving

A few nights ago, I was having some trouble sleeping, and I was up at 3 a.m. I decided it would be a good time to get up, grab a breakfast burrito and a coffee, and head to the Supercharger.

(If you don’t know, I do not have home charging, and I will be diving into EV ownership without that in a future article.)

I let FSD drive me to the Supercharger and back while I was done. I was able to enjoy a beautiful sunrise without having to focus all my attention on the traffic around me, while still maintaining enough attention to the road to keep the driver monitoring happy.

It was really nice. I enjoyed the ride, and it felt like I was in an Uber with a very careful driver while I enjoyed the rest of my coffee and peeked at the sky every few seconds.

Learning and Improving

A few weeks ago, I approached an “Except Right Turn” stop sign. I have discussed how these are a Pennsylvania specialty, and the first time FSD encountered one in my Model Y, it stopped, even though we were heading right.

I took over, submitted a voice memo to Tesla about it, and went on with my evening. A week later, the car approached the same turn, and, to my surprise, it proceeded through the Stop Sign correctly, safely, and at an appropriate speed.

It was nice to see this improvement, especially since this is one of those regional issues that Tesla will need to address before FSD is fully autonomous. The change even impressed my Fiancé, who was with me during both instances we came upon this turn.

Where Tesla Full Self-Driving Could Be Better

Auto Wipers

Good gravy, these Auto Wipers always seem to give me a good laugh.

They never really have the right speed; they are either way too fast or not fast enough. There’s never been a happy medium.

It also loves to activate a single wipe of the blade at the strangest times. I’ve noticed that it actually seems to activate at the same spots on the road sometimes. There’s a hanging branch near my house, and every time we go under it and FSD is activated, the wipers wipe once.

It would be nice to set your own intervals for the wipers, but I am okay with the current presets. I do hope the Auto Wipers improve, because it could be one of the best features the car has if it’s more accurate.

It Struggles with Signs That Require Reading

The “Except Right Turn” sign is one example, but another is a “Stop Here on Red” sign that is recessed from an intersection at a stop light if it’s a tighter turn. Recently, I had to slam on the brakes as it was headed straight through one of these signs.

It can recognize Stop Signs and Yield Signs, but signs with instructions for an intersection appear to present a greater challenge for FSD.

Sometimes, It Just Does Things I Don’t Like

There is a four-lane light near my house; the two right lanes go straight, but the lane furthest right is for turning into businesses past the intersection. Some people tend to go in that far right lane, even if they have no intention of turning right into the businesses, and take off quickly from the light to cut ahead.

I’m not saying it’s illegal or even wrong, but I personally prefer not to do it. I am never in that much of a hurry.

FSD tried to do that the other day; I intervened and kept it in the lane that is designed to go straight. I wouldn’t say this is technically an intervention. I would just say it’s a move I wasn’t super comfortable with because I know people tend to get frustrated with those who cut the line. It’s an etiquette issue, and I didn’t want FSD to do it.

I also am not a huge fan of when there is no traffic in the right lane, yet it continues to cruise in the fast lane. I was taught to drive in the right lane and pass in the left lane. There are states where cruising in the left lane is illegal, and it sometimes tends to stay in the passing lane too long for my liking. I will turn on my right signal and get back into the correct lane.

These are totally disputable, and I am aware of that. Some people might not see a huge issue with these two examples, and I can understand that. My courtesy on the road differs from others, and that’s okay.

All in all, I’m pretty happy with FSD, and I will be continuing my Subscription after the three-month trial ends. In the coming days, I’ll be picking up a camera for FSD videos, and I’ll be able to embed examples of what I mean, as well as share full-length videos of my drive.

News

Tesla gets price target increase on Wall Street, but it’s a head-scratcher

Delaney’s price target on Tesla shares went up to $395 from $300. Currently, Tesla is trading between $420 and $430, making the new price target from Goldman Sachs a bit of a head-scratcher.

Published

8 hours ago

September 18, 2025

Joey Klender

Credit: Cybertruck | X

Tesla (NASDAQ: TSLA) received a price target increase from a Wall Street analyst today, who noted in his report that the company’s shares could rise or fall based on its execution in robotics and autonomy.

However, the price target boost still fell below Tesla’s current trading levels.

Mark Delaney of Goldman Sachs said in a note to investors today that Tesla has a significant opportunity to solidify itself as one of the stable and safe plays in the market if it can execute on its two key projects: humanoid robots and autonomy.

In the note, Delaney said:

“If Tesla can have [an] outsized share in areas such as humanoid robotics and autonomy, then there could be upside to our price target.”

Delaney’s price target on Tesla shares went up to $395 from $300. Currently, Tesla is trading between $420 and $430, making the new price target from Goldman Sachs a bit of a head-scratcher.

He went on to say that Tesla could also confront outside factors that would limit the stock’s ability to see growth, including competition and potentially its own lack of execution:

“…although if competition limits profits (as is happening with the ADAS market in China) or Tesla does not execute well, then there could be downside.”

The note is an interesting one because it seems to point out the blatantly obvious: if Tesla performs well, the stock will rise. If it doesn’t, the stock price will decline.

We discussed yesterday in an article that Tesla is one of the few stocks out there that does not seem to be influenced by financials or anything super concrete. Instead, it is more influenced by the narrative currently surrounding the company, rather than the technicals.

Tesla called ‘biggest meme stock we’ve ever seen’ by Yale associate dean

Tesla’s prowess in robotics and autonomy is strong. In robotics, it has a very good sentiment following its Optimus project, and it has shown steady improvement with subsequent versions of the robot with each release.

On the autonomy front, Tesla is expanding its Robotaxi platform in Austin every few weeks, and also has a sizeable geofence in the Bay Area. Its Full Self-Driving suite is among the most robust in the world and is incredibly useful and accurate.

The company can gain significant value if it continues to refine the platform and eventually rolls out a driverless or unsupervised version of the Full Self-Driving suite.

Elon Musk

Tesla addresses door handle complaints with simple engineering fix

“We’ll have a really good solution for that. I’m not worried about it.”

Published

9 hours ago

September 18, 2025

Joey Klender

Tesla Model S self-presenting door handle (Credit: TesBros)

Tesla is going to adjust one heavily scrutinized part of its vehicles after recent government agencies have launched probes into an issue stemming from complaints from owners.

Over the past few days, we have reported on the issues with Tesla’s door handle systems from both the Chinese and American governments.

In China, it dealt with the Model S, while the United States’ National Highway Traffic Safety Administration (NHTSA) reported nine complaints from owners experiencing issues with 2021 Model Ys, as some said they had trouble entering their car after the 12V battery was low on power.

Bloomberg, in an interview with Tesla Chief Designer Franz von Holzhausen, asked whether the company planned to adjust the door handle design to alleviate any concerns that regulatory agencies might have.

Regarding the interior latch concerns in the United States:

Von Holzhausen said that, while a mechanical door release resolves this problem, Tesla plans to “combine the two” to help reduce stress in what he called “panic situations.”
He also added that “it’s in the cars now…The idea of combining the electronic and the manual one together in one button, I think, makes a lot of sense.” Franz said the muscle memory of reaching for the same button will be advantageous for children and anyone who is in an emergency.

Regarding the exterior door handle concerns in China:

Von Holzhausen said Tesla is reviewing the details of the regulation and confirmed, “We’ll have a really good solution for that. I’m not worried about it.”

Franz von Holzhausen (from Tesla’s Robovan) on Tesla’s upcoming redesigned door handles: pic.twitter.com/lnaKve1SlJ
— Sawyer Merritt (@SawyerMerritt) September 17, 2025

The new Model Y already has emergency mechanical door release latches in the back, but combining them in future vehicles seems to be an ideal solution for other vehicles in Tesla’s lineup.

It will likely help Tesla avoid complaints from owners about not having an out in the event of a power outage or accident. It is a small engineering change that could be extremely valuable for future instances.