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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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News

Tesla Superchargers open to Lucid Air, but not without one key thing

Lucid’s full lineup of EVs is now able to use Tesla Superchargers in the United States and Canada.

Published

4 hours ago

July 22, 2025

Joey Klender

Tesla Superchargers will be open to Lucid Air vehicles starting on July 31, a move that comes nearly two years after the companies agreed to terms that would allow them to partner.

Lucid joins a long list of EV makers that have a full lineup of EVs that can utilize Tesla’s extensive Supercharger Network across the United States and parts of Canada. In all, over 32,500 Tesla Superchargers will be accessible to Lucid owners at the end of the month.

Lucid NACS adoption ‘must have been a bitter pill to swallow’: Elon Musk

All Air models, regardless of year or trim level, will gain access to the entire North American Tesla Supercharger Network. It will just need one key thing to charge: an NACS adapter.

Lucid Air sedans will require a DC NACS to CCS1 adapter in order to enable charging at the Tesla stalls. These will be priced at $220 plus tax.

Emad Dlala, Senior VP of Powertrain at Lucid, said:

“In addition to offering the longest-range electric vehicle available, Lucid is committed to offering our customers seamless and wide access to public charging. Access to the Tesla Supercharging Network for the Lucid Air is yet another major milestone.”

Charging speeds will allow Air EVs to charge at up to 50 kW, gaining up to 200 miles of range per hour.

As for the Lucid Gravity, the company’s SUV, it will not require the adapter because of its native NACS port. It gained access to the Supercharger Network in January.

Although Lucid Airs will not be able to charge at the rate of some other vehicles, they do boast some of the best range ratings in the EV industry. Having the luxury of additional charging piles to access will increase the value of the long-range ratings Lucid offers with its vehicles.

Lucid joins several other automakers that have a full lineup of EVs that have access to the Tesla Supercharger Network:

Ford
Rivian
General Motors (Chevrolet, GMC, Cadillac)
Volvo
Polestar
Nissan
Mercedes-Benz
Hyundai
Kia
Genesis
Honda
Acura
Aptera

Other brands, like BMW, Audi, Volkswagen, Porsche, and Subaru, are expected to gain access in the near future.

News

Tesla Robotaxi wins over firm that said it was ‘likely to disappoint’

Tesla Robotaxi recently won over a Wall Street firm that had recently said the platform was “likely to disappoint.”

Published

10 hours ago

July 22, 2025

Joey Klender

Credit: Tesla

Tesla Robotaxi recently won over a Wall Street firm that had recently said the platform was “likely to disappoint.” The ride-hailing service has been operating for about a month, and driverless rides have been offered to a small group of people that continues to expand nearly every day.

JPMorgan went to Austin to test the Tesla Robotaxi platform, and it did so just a few weeks after listing Tesla as one of its “six stocks to short” in 2025. Highlighting the loss of the EV tax credit and labeling the Robotaxi initiative as one that was “likely to disappoint,” despite Tesla’s prowess in its self-driving software.

Analyst Ryan Brinkman has been skeptical of Tesla for some time, even stating that the company’s “sky-high valuation” was not in line with other stocks in the Magnificent Seven.

However, a recent visit to Texas that was made by JPMorgan analysts proved that the Robotaxi platform, despite being in its earliest stages, was enough for them to change their tune, at least slightly. The firm gave its props to the Tesla Robotaxi platform in a note by stating it was “certainly solid and felt like a safe ride at all times.”

It’s always nice to hear skeptics report positive experiences, especially as Robotaxi continues to improve and expand.

Tesla has already expanded its geofence for the Robotaxi suite in Austin, picking a very interesting shape for its newest boundaries:

Tesla’s Robotaxi expansion wasn’t a joke, it was a warning to competitors

As Robotaxi expands, Tesla is dealing with competition from Waymo, another self-driving ride-hailing service that is operating in Austin, among other areas. After Tesla’s expansion, which brought its accessible area to a greater size than Waymo’s, it responded by doubling its geofence.

Waymo’s expansion surpassed Tesla’s size considerably, and it seems Tesla is preparing to expand its geofence in the coming weeks.

Waymo responds to Tesla’s Robotaxi expansion in Austin with bold statement

The Robotaxi platform is not yet available to the public, but Tesla has been inviting more people to try it with every passing day. Currently, the map is roughly 42 square miles, but many believe Tesla is able to broaden this by a considerable margin whenever it decides.

Investor's Corner

Tesla needs to confront these concerns as its ‘wartime CEO’ returns: Wedbush

Tesla will report earnings for Q2 tomorrow. Here’s what Wedbush expects.

Published

11 hours ago

July 22, 2025

Joey Klender

Credit: Tesla

Tesla (NASDAQ: TSLA) is set to report its earnings for the second quarter of 2025 tomorrow, and although Wall Street firm Wedbush is bullish as the company appears to have its “wartime CEO” back, it is looking for answers to a few concerns investors could have moving forward.

The firm’s lead analyst on Tesla, Dan Ives, has kept a bullish sentiment regarding the stock, even as Musk’s focus seemed to be more on politics and less on the company.

However, Musk has recently returned to his past attitude, which is being completely devoted and dedicated to his companies. He even said he would be sleeping in his office and working seven days a week:

Back to working 7 days a week and sleeping in the office if my little kids are away https://t.co/77cc6sRCFZ
— Elon Musk (@elonmusk) July 20, 2025

Nevertheless, Ives has continued to push suggestions forward about what Tesla should do, what its potential valuation could be in the coming years with autonomy, and how it will deal with the loss of the EV tax credit.

Tesla preps to expand Robotaxi geofence once again, answering Waymo

These questions are at the forefront of what Ives suggests Tesla should confront on tomorrow’s call, he wrote in a note to investors that was released on Tuesday morning:

“Clearly, losing the EV tax credits with the recent Beltway Bill will be a headwind to Tesla and competitors in the EV landscape looking ahead, and this cash cow will become less of the story (and FCF) in 2026. We would expect some directional guidance on this topic during the conference call. Importantly, we anticipate deliveries globally to rebound in 2H led by some improvement on the key China front with the Model Y refresh a catalyst.”

Ives and Wedbush believe the autonomy could be worth $1 trillion for Tesla, especially as it continues to expand throughout Austin and eventually to other territories.

In the near term, Ives expects Tesla to continue its path of returning to growth:

“While the company has seen significant weakness in China in previous quarters given the rising competitive landscape across EVs, Tesla saw a rebound in June with sales increasing for the first time in eight months reflecting higher demand for its updated Model Y as deliveries in the region are starting to slowly turn a corner with China representing the heart and lungs of the TSLA growth story. Despite seeing more low-cost models enter the market from Chinese OEMs like BYD, Nio, Xpeng, and others, the company’s recent updates to the Model Y spurred increased demand while the accelerated production ramp-up in Shanghai for this refresh cycle reflected TSLA’s ability to meet rising demand in the marquee region. If Musk continues to lead and remain in the driver’s seat at this pace, we believe Tesla is on a path to an accelerated growth path over the coming years with deliveries expected to ramp in the back-half of 2025 following the Model Y refresh cycle.”

Tesla will report earnings tomorrow at market close. Wedbush maintained its ‘Outperform’ rating and held its $500 price target.