Resolution can also be an issue. For years, Palm and Pocket PC devices used fairly low resolution displays mostly x pixels , but as handhelds are being used for more sophisticated applications like mapping or browsing, many devices now have full x VGA displays. And if industrial handhelds follow smartphones, which some undoubtedly will, we'll soon see resolutions once thought unthinkable for handhelds. Designed to take a beating Handhelds are not immune to the laws of physics, but their generally smaller size and weight, and the absence of hard drives, makes them more able to take extreme punishment.
We have tested devices that can survive drops from six feet and more, and they not only continued to work, they didn't even get scratched or dented. Some are so well sealed that they can be used in driving rain or even submerged in water.
We have actually tested some underwater, in full Scuba gear. The image to the right is real. It continued to work. As with all computers scheduled to be used in tough jobs out in the field, picking the right one is the difference between success and failure of your project. So do your homework carefully.
Handheld computers are designed with deployment in certain types of environments in mind, so matching equipment to application is essential. Operating systems Most vertical market handheld computers run one of Microsoft's compact operating systems, either Windows CE or Windows Mobile essentially a friendlier user interface on top of Windows CE.
Where are handhelds headed? While consumer electronics change very quickly, industrial handheld computers have a much longer life cycle. Many models are being used in almost unchanged form year after year, with the importance being in ruggedness and convenience rather than whistles and bells.
However, time doesn't stand still and there are a number of technologies that are finding their ways into handhelds and will change how handhelds are being used. Some of these technologies are GPS, wide area wireless radios, RFID, high quality imagers and scanners, and integrated high resolution cameras. None of these technologies are new, but they are just now becoming powerful, small and reliable enough so they can be integrated into handhelds rather than being peripherals to them. Such integration, however, increases cost and complexity, so one should carefully consider what is needed and what is merely desirable.
Another interesting new development in rugged handled computers is the inclusion of increasingly sophisticated sensor technology. Motion sensors, pioneered in smartphones such as the Apple iPhone, can be used to automatically change display orientation, engage power conservation, or interact with applications. Light sensors can adjust screen brightness and thus safe battery power.
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