【正文】 ntation of heat meters (software part)總計(jì) 畢業(yè)設(shè)計(jì)（論文） 32 頁 表 格 3 個(gè) 插 圖 12 幅摘要我國北方冬季要供暖，為了節(jié)約能源，大多數(shù)地區(qū)已通過熱網(wǎng)集中供熱。熱量表，是計(jì)算熱量的儀表。本文主要用到 51 系列的單片機(jī)，流量傳感器采用超聲波流量計(jì)，溫度采集使用如今市面上使用普遍的 DS18B20，便攜式的多點(diǎn)鍵盤。 Calculation display, according to connected to it flow sensor and temperature sensor provide flow and temperature data, through the heat calculation of heat exchanging system users from heat gain. This paper mainly used 51 series of single chip microputer, flow sensor using ultrasonic flowmeter, temperature gathering use on market now use mon DS18B20, portable more keyboard.Keywords: Singlechip microputer；flowmeter ；Temperature collector目錄摘要 ...............................................................................................................................................IABSTRACT ................................................................................................................................II第一章 引言.................................................................................................................................1 選題背景........................................................................................................................1 熱量表簡(jiǎn)介....................................................................................................................1 國內(nèi)外發(fā)展概況.............................................................................................................2 開發(fā)熱量表的意義和前景............................................................................................2 研究?jī)?nèi)容與目標(biāo)............................................................................................................3第二章 熱量表硬件電路設(shè)計(jì)...................................................................................................4 電源電路的設(shè)計(jì)............................................................................................................4 主控部分的設(shè)計(jì)............................................................................................................4 溫度檢測(cè)電路的設(shè)計(jì)....................................................................................................5 流量檢測(cè)電路的設(shè)計(jì)....................................................................................................6 顯示電路的設(shè)計(jì)............................................................................................................8 鍵盤電路的設(shè)計(jì)............................................................................................................8第三章 熱量表總體軟件設(shè)計(jì)...................................................................................................10 熱量表工作原理..........................................................................................................10 系統(tǒng)資源分配...............................................................................................................11 主程序的設(shè)計(jì)..............................................................................................................11第四章 熱量表軟件詳細(xì)設(shè)計(jì)...................................................................................................14 流量串口通訊設(shè)計(jì).......................................................................................................14 溫度檢測(cè)設(shè)計(jì)..............................................................................................................15 焓值按鍵設(shè)計(jì)...............................................................................................................18 顯示部分軟件控制設(shè)計(jì)..............................................................................................18第五章 總結(jié)與展望...................................................................................................................20致謝.............................................................................................................................................21參考文獻(xiàn).....................................................................................................................................22附錄一：總圖.............................................................................................................................23附件二：程序清單.....................................................................................................................24第一章 引言 選題背景如今，節(jié)能成為大家越來越來關(guān)注的話題。隨著改革開放的不斷深入，人民生活水平的不斷提高，商品意識(shí)的不斷加強(qiáng)，舊體制已遠(yuǎn)不能適應(yīng)當(dāng)前經(jīng)濟(jì)生活的發(fā)展。供熱由供熱單位單一方支配，隨意性強(qiáng)，缺少制約機(jī)制。 熱量表簡(jiǎn)介按熱量計(jì)費(fèi)，必須有熱量計(jì)量工具，而熱量表就是建立在用戶計(jì)量的基礎(chǔ)上，通過測(cè)量流經(jīng)熱交換系統(tǒng)的熱總量。目前比較實(shí)用的有三種熱量表，霍爾式、電磁式和超聲波式熱量表。超聲波式熱量表是通過超聲波射線直射或反射的方法