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—Based on the review of the development situation of the ETC home and abroad and the ETC key technology, this paper put forward to apply ZigBee network in the freeway ETC system. CC2431 wireless location function is used in the high speed highway ETC system to realize data transmission between network centre node and terminal node safely, which records(More)
—Manual meter reading was main way in traditional water management. It was not only waste of human and material resources, but also very inconvenient. Especially in recent years, with the emergence of a number of high residential, this way of water management was obviously inefficient. In this paper, based on the study of existed water meters, a kind of(More)
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