HVAC Control in the New Millennium.pdf - HVAC.Amickracing

HVAC Control in the New MillenniumThe Windows CE operating system (OS) is modular, so some portionsof Windows CE may be excluded from portable products. Thereare power-management schemes in Windows CE that define the powerstates as On, Idle, and Suspended/Off.There are also new ways to interact with portable and desktopPCs. Speech recognition and synthesis are used for heads up interactionand safety. The personal digital assistant (PDA) of the future is likely tohave some kind of handwriting recognition, similar to the input madepopular by the 3Com PalmPilot. Full-motion video will become a requirementfor Web use. Video input could be used for face-recognitionsecurity and gesture control of programs.PDAs may be used to change the heating and cooling setpoints,turn on lighting, appliances and boot up the PC. Hand-held PDAs willcommunicate with mobile and fixed networks. This could be doneacross a robust and secure wireless network. Many products will needmore wireless technology built into them.The advent of Windows CE forces the additional integration ofsystems. There will be a merging of pager, phone, voice mail and e-mailinto one unit. More people will be able to use these products as theybecome more user friendly through the familiar Windows environment.Performance will become critical. The proper configuration of thesystem (power management, cache size, memory speeds, bus latency,and CPU architecture) will allow 100-MHz products to outperformpoorly-optimized 233-MHz systems. Improved interconnectivity willallow the user to be able to store files, web pages, and messages on theserver instead of the PDA.There will be continued improvement in storage medium for thePDA. Information overload will continue to grow, and information processingis driving technology. PDAs will be enlisted to control this overload.A typical PDA device will use two major integrated-circuit (IC)parts; a Windows CE million-instructions-per-second (MIPS) processorand an analog application-specific integrated circuit (ASIC) for input/output interfacing.Windows CE is language-independent and compatible with morethan 2,500 of the most popular Windows APIs and Win32 programmingmodels. It uses the same .exe/.dll files, processes, and threads. It can bestored in ROM and has built-in communications to PCs, the Internet,and other Windows CE devices.©2001 by The Fairmont Press, Inc. All rights reserved.