To overcome the deficiency of the existing billing modes of hot water system, such as based on time or flow signal alone, in this paper a billing method which integrates several signals is presented. The detected flow, temperature and time signals are synthesized to determine the billing function of hot water. Due to the different seasons and regions, an adjustment factor is designed to make the billing function more flexible and intelligent. This may make users’ expenses reasonable, and it also considers the loss of the managers. This proposed billing mode is successfully implemented in the hardware system controlled by Single-chip Microcomputer.
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