What is Project Soli by Google and How does it work?
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Project Soli started in 2015 during the I/O Conference of Google. Since then Google’s ATAP (Advanced Technology and Projects) team has been working to build and integrate this technology with wearables, phones, computers and IoT Devices. With Google’s soli chip you can track your motion at a microscopic scale. Due to the use of miniature radars it is able to track sub-millimeter motions of human hands with great accuracy.
What are the advantages of Soli Radar over Sensors?
This chip is just 8*10 mm and has functionalities of both sensor and antenna in the single device. With this little size it can be fitted in almost all devices invisibly. It consumes very little energy and has no effect over various lighting conditions. Along with the physical chip, Google is also developing a language for interacting with this chip using gestures.Google calls this as Virtual Tools Gestures and these gestures involve things like pressing an invisible button between your thumb and index finger or turning a dial by rubbing your thumb and index finger together.
How does Google’s Soli Chip work?
There are a number of ways information can be interpreted using radars like raw radar data, machine learning, probable gestures and predefined gestures. Google has developed robust machine learning models for different use cases. These models don’t send data to google server so allowing robust and private sensing.This chip works on the principle of Emit, Reflect and Recognize. Google’s Soli chip emits electromagnetic waves and objects within the range reflect back the information. Reflected information may be in the form of time delay and frequency changes, by processing these signals Soli can distinguish and identify different complex hand gestures. Barbello from the Google atap team says that “ We can sense motions as precise as Butterfly’s wings”.
Where has Soli Radar been used Commercially?
The first ever commercial use of Soli was in Google Pixel 4 where it basically focused on three types of interactions. The interactions were Presence, Reach and Gesture. With Presence capability it understands whether you are present at a distance of a foot or two from the mobile and if not then it will shut down the always on screen. With Reach Capability it knows if you are reaching out for mobile and then it will quickly turn on the screen and face unlock sensors. And finally with the last interaction Gesture you can swipe to cancel those calls or alarms. You can also swipe left or right to change the music.
How will Soli change the way we use devices?
Soli Technology does have potential to change ways through which we interact with devices, especially wearable devices. Wearable devices are the ones who have smaller displays and always need to provide a richer experience.
For example, earlier Apple watches were introduced with Digital Crown that allows you to navigate the WatchOS interface in an additional way. Now if those digital crowns could be easily replaced by soli chips through which you would just need to mimic turning down a volume or just mimic pressing a button to turn something on or off.
As mentioned above Soli was first used commercially in Google Pixel 4 and tech enthusiasts were really admiring the upgradation in gesture features during Google Pixel 5 launch. But surprisingly Google dropped the Soli technology from Pixel 5 phones.
Many people argue that this is not strictly necessary and thus might be a gimmick. The question is do we really need our phone to wake up 5 seconds before we touch it, saving us a tap on the screen? Is it really that difficult for us to hit that snooze button? The thing is nobody needs radar but it adds to make the experience better.