editor's blog
Subscribe Now

Shock Value

The area of sensors is tightly intertwined with that of energy harvesting, since many sensors are in far-flung installations that are hard to power.

Early this year we looked at a self-sufficient energy harvester that fed itself on vibrations; it was able to generate up to 35.8 µW of power given vibrations of 1 G. Recently, imec announced at IEDM average generation of 42 µW, with a record of 489 µW under optimal conditions.

The installation? This is specifically for tires, using the shocks that the tires experience as the source of energy. Not a remote setting, but still, if you want to put sensors in your tire – for pressure, for example – you really want a wireless, self-sufficient way to do it. The average power generated is at a driving speed of 70 km/h; this, they say, is enough to power a wireless sensor node. I guess that would mean that, at some (unspecified) slower speed, the node would start to fail – depending on batteries or caps or whatever was done to manage and condition the power.

The peak value can be attained if the vibration frequency is near the resonant frequency of the cantilever in the MEMS unit, which is 1011 Hz. Probably hard to drive the car in a manner that exploits that, but then again, if the node is working, then more power won’t make it work more, so it doesn’t matter. For that application, anyway.

More info can be found in their release.

Leave a Reply

featured blogs
Jul 6, 2020
If you were in the possession of one of these bodacious beauties, what sorts of games and effects would you create using the little scamp?...
Jul 3, 2020
[From the last episode: We looked at CNNs for vision as well as other neural networks for other applications.] We'€™re going to take a quick detour into math today. For those of you that have done advanced math, this may be a review, or it might even seem to be talking down...
Jul 2, 2020
In June, we continued to upgrade several key pieces of content across the website, including more interactive product explorers on several pages and a homepage refresh. We also made a significant update to our product pages which allows logged-in users to see customer-specifi...

Featured Video

Product Update: DesignWare® TCAM IP -- Synopsys

Sponsored by Synopsys

Join Rahul Thukral in this discussion on TCAMs, including performance and power considerations. Synopsys TCAMs are used in networking and automotive applications as they are low-risk, production-proven, and meet automotive requirements.

Click here for more information about DesignWare Foundation IP: Embedded Memories, Logic Libraries & GPIO

Featured Paper

Cryptography: How It Helps in Our Digital World

Sponsored by Maxim Integrated

Gain a basic understanding of how cryptography works and how cryptography can help you protect your designs from security threats.

Click here to download the whitepaper

Featured Chalk Talk

Cloud Computing for Electronic Design (Are We There Yet?)

Sponsored by Cadence Design Systems

When your project is at crunch time, a shortage of server capacity can bring your schedule to a crawl. But, the rest of the year, having a bunch of extra servers sitting around idle can be extremely expensive. Cloud-based EDA lets you have exactly the compute resources you need, when you need them. In this episode of Chalk Talk, Amelia Dalton chats with Craig Johnson of Cadence Design Systems about Cadence’s cloud-based EDA solutions.

More information about the Cadence Cloud Portfolio