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Railway solar panels?

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aurora83 | 02:05 Sun 10th Sep 2006 | How it Works
5 Answers
What are those mini solar panels that you see along the railway lines?

What do they do?
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Avatar Image Clanad
Usually, at least here in the U.S., they are used to charge small batteries that, in turn, are used to power radio transmitters that, due to their modular design, do not require much wattage... The transmitters are sending data rather than voice signals...
16:38 Sun 10th Sep 2006
Avatar Image heathfield
E.g. track (rail) temperature sensors, important in the case of welded 'continuous' rail.
18:09 Sun 10th Sep 2006
Avatar Image spaced
in the event of a power failure
15:35 Mon 11th Sep 2006
Avatar Image Clanad
Actually, spaced, the only power is the solar panel and rechargeable batteries. The beauty of the device is that it can be installed anywhere without the need for electrical power...
01:33 Tue 12th Sep 2006

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