智能導(dǎo)熱系數(shù)測(cè)試儀測(cè)控系統(tǒng)的設(shè)計(jì)

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4、iew.SplitSpecialwdPaneNoneThenActiveWindow.PanestiveWindow.ActivePane.View.TypewdNormalViewActiveWindowActivePane.View.TypwdOutlineViewTheActiveWindow.ActivePane.View.TypwdPrintView摘 要導(dǎo)熱系數(shù)是表征物質(zhì)熱傳導(dǎo)性質(zhì)的物理量，材料結(jié)構(gòu)的變化與所含雜質(zhì)的不同對(duì)

5、導(dǎo)熱系數(shù)值都有明顯的影響。導(dǎo)熱系數(shù)作為衡量建筑材料保溫性能，表征料傳熱能力的重要指標(biāo)一直為人們所重視，材料的導(dǎo)熱系數(shù)經(jīng)常需要由實(shí)驗(yàn)具體測(cè)定，目前大多使用電位差計(jì)和電流計(jì)來人工測(cè)定計(jì)算導(dǎo)熱系數(shù)，其缺點(diǎn)是自動(dòng)化程度低、通用性差、調(diào)節(jié)過程復(fù)雜、測(cè)試結(jié)果容易受到人為因素的影響。隨著我國(guó)經(jīng)濟(jì)和科學(xué)技術(shù)的發(fā)展，新產(chǎn)品、新材料不斷涌現(xiàn)，工業(yè)、農(nóng)業(yè)、建筑、地質(zhì)、等部門對(duì)新產(chǎn)品、新材料的導(dǎo)熱系數(shù)測(cè)量越來越多，精度要求也越來越高，面對(duì)科研、生產(chǎn)的高要求，用

6、微機(jī)和智能控制方法構(gòu)成的一種新型的數(shù)字測(cè)控系統(tǒng)十分必要，智能導(dǎo)熱系數(shù)的測(cè)控系統(tǒng)提高了保溫材料特性測(cè)試的自動(dòng)化和智能水平，同時(shí)提高了測(cè)量的效率和測(cè)試的精度，減輕了人員的勞動(dòng)強(qiáng)度。本次設(shè)計(jì)的任務(wù)是智能導(dǎo)熱系數(shù)測(cè)試儀測(cè)控系統(tǒng)的設(shè)計(jì)。本測(cè)控系統(tǒng)主要功能是通過加熱模塊對(duì)被測(cè)保溫（絕熱）材料的兩側(cè)進(jìn)行加溫。當(dāng)兩側(cè)溫度達(dá)到穩(wěn)定時(shí)，形成穩(wěn)定的溫差。該溫差形成一個(gè)穩(wěn)定的熱流通過被測(cè)材料。根據(jù)此溫差和材料的幾何尺寸等參數(shù)和計(jì)算公式就可計(jì)算得出該材料的導(dǎo)熱系

7、數(shù)。因此，本設(shè)計(jì)任務(wù)主要包括：材料兩側(cè)的溫度測(cè)量、溫度控制、穩(wěn)溫狀態(tài)的判定和導(dǎo)熱系數(shù)的計(jì)算、被測(cè)材料幾何參數(shù)的輸入、導(dǎo)熱系數(shù)結(jié)果的顯示等。通過任務(wù)分析、方案比較確定和電路設(shè)計(jì)，較好的實(shí)現(xiàn)了導(dǎo)熱系數(shù)測(cè)試儀測(cè)控系統(tǒng)的設(shè)計(jì)任務(wù)。關(guān)鍵詞 關(guān)鍵詞：微型處理器，導(dǎo)熱系數(shù)，智能，溫度控制，功率驅(qū)動(dòng)ekCurrentPageFootePane.View.SeekVieweekCurrentPageHIfHeaderSelection.WholeSSel

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11、ewdNormalViewActiveWindowActivePane.View.TypwdOutlineViewTheActiveWindow.ActivePane.View.TypwdPrintViewintelligence level. At the same time, it improves the measure efficiency and the test accuracy, alleviates the person

12、nel's labor strength.The task of this design is to design and finish a measure system which contains a intelligent machine measuring the coefficient of transmitting heat.It mainly designs to collect the temperat

13、ure of the material which is to be measured with thermo-element on the condition that the temperature controlling module makes the measuring condition reaching a stably level .And then amplifier, convert it from analog t

14、o digital, deliver it and the conduct in the whole controlling module, then convert the processed signal from digital to analog signal, control the heating efficiency. Then it designs the communication between the upper

15、and below computer and the communicating bus among each module, and so on. Finally we finish the task which contains the measure of the coefficient of transmitting heat which the material have, and the manifestation of t

16、he data result with CRT. And what’s more, the measure result could be printed out from the printer at any time.By the designing of the each module above, we complete the measuring function of the machine which measures t

17、he coefficient of transmitting heat, and obtain quite a good result which we look forward to. The design result proves that the measuring system with high intelligence and automation level improves the intelligence and a

18、utomation level in measuring the characters of the preserving heat material, meantime, improves the measure efficiency and the test accuracy. Key word: MCU, The coefficient of transmitting heat, intelligence, Temperatur