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 20, 2024
If you are looking for great technology-related reads, here are some offerings that I cannot recommend highly enough....

featured video

Larsen & Toubro Builds Data Centers with Effective Cooling Using Cadence Reality DC Design

Sponsored by Cadence Design Systems

Larsen & Toubro built the world’s largest FIFA stadium in Qatar, the world’s tallest statue, and one of the world’s most sophisticated cricket stadiums. Their latest business venture? Designing data centers. Since IT equipment in data centers generates a lot of heat, it’s important to have an efficient and effective cooling system. Learn why, Larsen & Toubro use Cadence Reality DC Design Software for simulation and analysis of the cooling system.

Click here for more information about Cadence Multiphysics System Analysis

featured paper

Navigating design challenges: block/chip design-stage verification

Sponsored by Siemens Digital Industries Software

Explore the future of IC design with the Calibre Shift left initiative. In this paper, author David Abercrombie reveals how Siemens is changing the game for block/chip design-stage verification by moving Calibre verification and reliability analysis solutions further left in the design flow, including directly inside your P&R tool cockpit. Discover how you can reduce traditional long-loop verification iterations, saving time, improving accuracy, and dramatically boosting productivity.

Click here to read more

featured chalk talk

Datalogging in Automotive
Sponsored by Infineon
In this episode of Chalk Talk, Amelia Dalton and Harsha Medu from Infineon examine the value of data logging in automotive applications. They also explore the benefits of event data recorders and how these technologies will shape the future of automotive travel.
Jan 2, 2024
27,158 views