方案描述：

Renesas' range of low power 8/16-bit microcontrollers offers the optimized functions including A/D converter for measuring water temperature, serial communication interfaces, and LCD controller for displaying data. A heat meter is essential for managing the heat level and billing data of a heating system. In addition to basic functions for sensing water temperature, flow, and measuring heat units, a variety of other functions are also in demand for heat meters. The high-demand functions include display of spot temperature, flow rate, and wired or wireless connection with a central control unit. 熱量表，是計(jì)算熱量的儀表。熱量表的工作原理：將一對溫度傳感器分別安裝在通過載熱流體的上行管和下行管上，流量計(jì)安裝在流體入口或回流管上（流量計(jì)安裝的位置不同，最終的測量結(jié)果也不同），流量計(jì)發(fā)出與流量成正比的脈沖信號，一對溫度傳感器給出表示溫度高低的模擬信號，而積算儀采集來自流量和溫度傳感器的信號，利用積算公式算出熱交換系統(tǒng)獲得的熱量。

方案設(shè)計(jì)圖：

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