Futuristic factories make mesh: "Industrial motors (not including facility heating and ventilating) consumed 679 billion kilowatt hours in the United States in 2003. That's 63 percent of all electricity used in industry and 23 percent of all electricity sold in the United States last year, according to the Energy Department. .. DOE figures a wireless sensor network could increase a motor's efficiency by 10 to 20 percent, which corresponds to a total U.S. energy savings of 120 trillion BTUs (35.1 billion kW-hr) per year..
Sensicast has devised a suite of control programs that have frequency "agility" — that is, they seek out the clear frequencies and attempt to evenly spread out the simultaneous communications going on among the nodes on the mesh. ..
Each wireless sensor will operate for years on a single battery charge, but for the future, GE is working on new technology that could harvest the vibrational energy of the motor itself to power the transceivers. Rensselaer, for its part, will be developing a physics-based model that will enable turnkey analysis and lifetime predictions from the sensor outputs of a motor. " 7:59:29 AM