Embedded Systems Conference
Breaking News
Comments
Oldest First | Newest First | Threaded View
CC VanDorne
User Rank
Author
4th, now.
CC VanDorne   11/22/2013 3:58:52 PM
NO RATINGS
This is the fourth semi company, that I've seen anyway, getting into the gesture senser business.  So far, visiting my company have been: Maxim, Vishay and recently MicroChip (with what may very well have been an SMSC product.)  Anf all have different ways of going about it.

Anyway, its interesting.  Companies generally don't make technology investments on the come.  Something big must be about break in this area.

junko.yoshida
User Rank
Author
Re: 4th, now.
junko.yoshida   11/22/2013 5:53:00 PM
NO RATINGS
@C VanDorne, thanks for chiming in. That's a good intelligence...I wonder what that big application might be???

DrQuine
User Rank
Author
sonar and gesture recognition
DrQuine   11/24/2013 3:11:54 PM
NO RATINGS
The referenced EETimes Europe article included an image to set expectations for the gesture recognition system.  It shows a hand selecting one of several large blocks on a screen.  That should be easy to manage with sonar (ultrasound). It will provide the significant benefit that no contact need be made with the screen and therefore the screen will not get covered with fingerprints or dirt (especially in an industrial environment).

When I think of gestures, I think of positional signals with hands (like sign language). That would be a much more difficult task to manage with ultrasound - especially if the user were at any distance. Likewise fine motions will be difficult to manage with the sonar system (such as selecting a character in a string to edit).

Terry.Bollinger
User Rank
Author
Re: sonar and gesture recognition
Terry.Bollinger   11/25/2013 10:38:49 AM
NO RATINGS
As DrQuine already noted, "gesture recognition" for many user communities brings to mind large-scale hand gestures such as pointing at a location or football referee signals. While the ultrasonic approach described in this article is interesting, a title such as "Wolfson to Use Bat-Like Sonar to Replace Contact Keyboards" might have captured the scope better.

It is an interesting and open question whether more complex bat-inspired methods (chirping comes to mind) could outperform passive and active optical approaches in key performance areas such as power consumption and resolution. Passive optical is faced with the power-draining need for real time image parsing, while active structured light methods (e.g. Kinect and Leap) have issues of illumination costs. However, bats use ultrasound for high-precision real-time location of both their environment (e.g. caves) and tiny prey (insects), and do so at considerable distances. So an existence proof for the possibility of long-distance ultrasonic scene and gesture analysis certainly exists in the world of biology.

However, my suspicion is that physics will intervene to make long-distance ultrasonic spatial perception a weak competitor in small devices.

For one thing, ultrasound would almost certainly require rapid-cycle flash illumination of large areas at power-draining high ultrasonic frequencies. But perhaps even more limiting is the antenna issue. Wavelengths are not a a big issue for compact optical receivers, but for ultrasound even a 33 KHz frequency echo has a wavelength of about a centimeter. Thus to provide adequate resolution, an ultrasound receiver will require single or multi-point antennas that span scales not much different from small mobile devices. Or to put that last point more colloquially while picking unfairly on singular antennas: Would anyone other than an avid DC comic fan really want a bat-eared mobile phone?



Top Comments of the Week
Like Us on Facebook

Datasheets.com Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Max Maxfield

March 28 is Arduino Day -- Break Out the Party Hats!
Max Maxfield
6 comments
Well, here's a bit of a conundrum. I just received an email from my chum David Ashton who hails from the "Unfinished Continent" Down Under. David's message was short and sweet; all he said ...

Bernard Cole

A Book For All Reasons
Bernard Cole
1 Comment
Robert Oshana's recent book "Software Engineering for Embedded Systems (Newnes/Elsevier)," written and edited with Mark Kraeling, is a 'book for all reasons.' At almost 1,200 pages, it ...

Martin Rowe

Leonard Nimoy, We'll Miss you
Martin Rowe
5 comments
Like many of you, I was saddened to hear the news of Leonard Nimoy's death. His Star Trek character Mr. Spock was an inspiration to many of us who entered technical fields.

Rich Quinnell

Making the Grade in Industrial Design
Rich Quinnell
16 comments
As every developer knows, there are the paper specifications for a product design, and then there are the real requirements. The paper specs are dry, bland, and rigidly numeric, making ...

Special Video Section
After a four-year absence, Infineon returns to Mobile World ...
A laptop’s 65-watt adapter can be made 6 times smaller and ...
An industry network should have device and data security at ...
The LTC2975 is a four-channel PMBus Power System Manager ...
In this video, a new high speed CMOS output comparator ...
The LT8640 is a 42V, 5A synchronous step-down regulator ...
The LTC2000 high-speed DAC has low noise and excellent ...
How do you protect the load and ensure output continues to ...
General-purpose DACs have applications in instrumentation, ...
Linear Technology demonstrates its latest measurement ...
10:29
Demos from Maxim Integrated at Electronica 2014 show ...
Bosch CEO Stefan Finkbeiner shows off latest combo and ...
STMicroelectronics demoed this simple gesture control ...
Keysight shows you what signals lurk in real-time at 510MHz ...
TE Connectivity's clear-plastic, full-size model car shows ...
Why culture makes Linear Tech a winner.
Recently formed Architects of Modern Power consortium ...
Specially modified Corvette C7 Stingray responds to ex Indy ...
Avago’s ACPL-K30T is the first solid-state driver qualified ...
NXP launches its line of multi-gate, multifunction, ...
Radio
LATEST ARCHIVED BROADCAST
EE Times Senior Technical Editor Martin Rowe will interview EMC engineer Kenneth Wyatt.
Flash Poll