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smart dust brief[1]-doug 05

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Smart Dust ISRC Technology Briefing Prepared by: Doug Steel March 2005 1 Introduction ”Smart Dust” is an emerging technology made up from tiny, wireless sensors or “motes.” Eventually, these devices will be smart enough to talk with other sensors yet small enough to fit on the head of a pin. Each mote is a tiny computer with a power supply, one or more sensors, and a communication system (Hsu, Kahn, and Pister 1998, p. 1). Commercially available motes do not yet fit on the head of a pin; some are about the size of a deck of cards and others are as small as a stack of a few quarters (Eng 2004). Smart dust motes are typically outfitted with environmental sensors which can monitor things like temperature, humidity, lighting, position, and acceleration (Crossbow 2004a). And one vendor, SkyeTek, sells a sensor that can read RFID tags (SkyeTek 2005). Dust mote battery life ranges from a few hours to 10 years, depending on the size and capabilities of the device (Bigelow 2004). Future motes will be smaller (as in figure 1) and have longer battery lives. Already, researchers at the University of California, Berkeley (UC Berkeley) have developed a mote roughly the size of an aspirin tablet ( Yang 2003). For power, future motes could be supplemented  by solar cells or even be powered  by “vibrations in the wall – a bit like a self winding wristwatch” (Manjoo 2001). There are numerous applications for smart dust technology, and as motes become smaller, cheaper, and better understood many other uses will emerge. Three potential applications of smart dust technology are illustrated here – one involving a forest service organization, another for a chemical plant, and one for a provider of lighting and power. A forest service could use smart dust to monitor for fi res in a forest (Eng 2004). In this scenario, forest service personnel would drop the dust from an airplane and then count on the sensors to self-organize i nto a network. In the event of a fi re, a mote that notices unusual temperatures in its zone would alert neighboring notes that would in turn notify other motes in the network. In this way t he network of motes would noti fy a central monitoring station of the 1  Figure 1. A UC Berkeley researcher blows a sample of  glitter into the air . Eventually, smart dus t motes will be the  size of glitter. (Image source: Smart Du st Project Web Site, (Pister 2001)).

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