集成溫度傳感器外文翻譯

1、<p><b>　　附錄C</b></p><p>　　The integrated temperature sensor is a kind of semiconductor integrated circuit in fact, it is who utilizes the transistor b-e Form saturation value lowered to pres

2、s VBE With thermodynamics temperature T With passing the emitter electric current I Relation.</p><p>　　It is good that the integrated temperature sensor is linear, such advantages as the precision is moderat

3、e, the sensitivity is high, small, easy to use, used widely. The output form9 of the integrated temperature sensor is divided into two kinds voltage exporting and electric current outputs. The sensitivity of the voltage

4、outputting type is generally 10mV/K, Temperature 0 Degrees Centigrade are exported hour 0 ,Temperature 25 Degrees Centigrade are exported hour 2.982V . The sensitivity of the o</p><p>　　AD590 It is the singl

5、e integrated temperature sensing electric current source of both ends where U.S.A. simulation device Company produces. Its main characteristic is as follows: </p><p>　　(1) flow through device electric curren

6、t ( A )Mean the reading of thermodynamics temperature (turns on gently ) of living in environment of the device. </p><p>　　(2) AD590 Examine warm range -55 Degrees Centigrade- +150 Degrees Centigrade. </

7、p><p>　　(3) AD590 Power voltage range 4V - 30V . The voltage of the power can be here 4V~6V The range changes, electric current Change 1 A ,In other words temperature changes 1K . AD590 Can bear 44V To voltage

8、 sum 20V Reverse voltage, therefore the transposition of the device will not be damaged either. </p><p>　　(4) the resistance of output is 710M . </p><p>　　(5)the precision is high. AD590 Own in

9、 common I J K L M Five shelves, among them M The shelf is the highest in precision, here -55 Degrees Centigrade- +150 In one degrees Centigrade of ranges, the non-linear error is ± 0.3 Degrees Centigrade. </p>

10、<p>　　1、 the application circuit basically </p><p>　　Pursue 1 ( a ) AD590 Encapsulation form, pursue 1 ( b ) AD590 Used for measuring using the circuit basically of thermodynamics temperature. Because

11、 flow through AD590 Electric current in direct proportion to thermodynamics temperature, look on as resistance R 1 With the electric potential device R 2 Resistance sum 1k Hour, output the voltage VO The change which i

12、s up to temperature is 1mV/K . But because AD590 Gain by deviation of having, resistance too it have error of, so should adjust to ci</p><p>　　Pursue 1 ( a ) AD590 Encapsulation form, pursue 1 ( b ) AD590 Us

13、ed for measuring using the circuit basically of thermodynamics temperature. Because flow through AD590 Electric current in direct proportion to thermodynamics temperature, look on as resistance R 1 With the electric pot

14、ential device R 2 Resistance sum 1k Hour, output the voltage VO The change which is up to temperature is 1mV/K . But because AD590 Gain by deviation of having, resistance too it have error of, so should adjust to ci<

15、/p><p>　　2、 Centigrade temperature survey circuit </p><p>　　Such as pursuing 2 Show, the electric potential device R 2 Used for adjusting the zero point, R 4 Used for changing and transporting putt

16、ing LF355 Gain. Adjust the method as follows: Here 0 Degrees Centigrade are adjusted hour R 2 ,Enable exporting VO =0 ,Then here 100 Degrees Centigrade are adjusted hour R 4 Make VO =100mV . Such repetition change numero

17、us, until 0 A hour, VO =0mV , 100 A hour VO =100mV . Carry on check-up under the room temperature finally. For example, if the room temperature</p><p>　　Enable pursuing 2 The output of China is 200mV/ Degree

18、s Centigrade, can feedback through increasing (picture feedback resistance of for resistance from R 3 With the electric potential device R 4 Contact but become) realize. In addition, while measuring the Fahrenheit temper

19、ature , because Fahrenheit temperature is equal to thermodynamics temperature to deduct 255.4 Multiplied by again 9/5 ,So demand to export 1mV/ ℉, adjusts the resistance of feed backing about 180k ,Make temperature 0 A

20、hour, </p><p>　　3、 the difference in temperature measures the circuit and application </p><p>　　(1) Circuit and principle analysis </p><p>　　Pursue 3 Utilize two AD590 Measure two c

21、ircuit with bad temperature. Feed backing the resistance 100k Situation under, set up 1 # Sum 2 # AD590 The temperature of the place is respectively (degrees Centigrade) sum (whether degrees Centigrade),it output volta

22、ge as. Electric potential device in the picture R 2 Used for returning to zero. Electric potential device R 4 Used for changing and transporting putting LF355 Gain. </p><p>　　(2) Use and give an example <

23、/p><p>　　Take warm in some energy-efficient crude drugs warehouse , humidity control system as an example, if require the temperature of the storehouse is lower than T Degrees Centigrade, relative humidity is l

24、ower than A 1 B 1 %RH . Two kinds of control modes adopted are as follows: </p><p>　　Control mode one: The relative humidity is higher than in the storehouse A 1 B 1 %RH And temperature is lower than outside

25、 the storehouse T A hour, ventilate inside and outside the storehouse. This way is to utilize bad exchange which carries on the air of the internal and external humidity of the storehouse, in order to reach the demand de

26、humidifying in the storehouse, its advantage is high-efficient , energy-conservation , saving the fund. But this way receives strict control. First of all, th</p><p>　　Control the mode two: As temperature is

27、 higher than T Degrees Centigrade or the humidity are higher than A 1 B 1 %RH At unsatisfied with first stationing , open frozen air conditioner aircrew carry on storehouse lower the temperature to dehumidify.</p>

28、<p>　　Because storehouse internal and external difference in temperature too big the medicines , apparatus surface marry the phenomenon revealed when ventilating for prevent from, must rigorously enforce the precis

29、ion of the value of difference in temperature of the control system . Traditional examining the method of difference in temperature is to deal with two temperature separately (nurse one's health in the circuit, A/D ,

30、 deal with operation) after ask by difference, the low in precision in diffe</p><p>　　4、 N Measurement of some minimum temperature value </p><p>　　Will examine a bit more warmly several that hav

31、e differently AD590 Contact , can measure all measure temperature minimum value that point have. </p><p>　　This method can apply to measure some occasions of minimum temperature more . </p><p>　

32、　5、 N Measurement of the average of some temperature </p><p>　　One N One AD590 Is it stand up to connect in parallel , fetch after suing for peace electric current average , can is it produce average tempera

33、ture to ask. </p><p>　　This method is suitable for needing some average temperature more but not needing the occasion of concrete temperature of each point . </p><p>　　AD590 Measure thermodynami

34、cs temperature , centigrade temperature , two temperature bad , many some minimum temperature , many some average concrete circuit of temperature, apply to different temperature control occasions extensively. Because AD5

35、90 Precision high, price low taking auxiliary power , linear and good , daily on examine gentle cold end of electric thermocouple compensate. </p><p>　　集成溫度傳感器實(shí)質(zhì)上是一種半導(dǎo)體集成電路，它是利用晶體管的b-e結(jié)壓降的不飽和值VBE與熱力學(xué)溫度T和通過發(fā)射

36、極電流I的下述關(guān)系實(shí)現(xiàn)對(duì)溫度的檢測(cè)。</p><p>　　集成溫度傳感器具有線性好、精度適中、靈敏度高、體積小、使用方便等優(yōu)點(diǎn)，得到廣泛應(yīng)用。集成溫度傳感器的輸出形式分為電壓輸出和電流輸出兩種。電壓輸出型的靈敏度一般為10mV/K，溫度0攝氏度時(shí)輸出為0，溫度25攝氏度時(shí)輸出2.982V。電流輸出型的靈敏度一般為1A/K。 </p><p>　　AD590是美國(guó)模擬器件公司生產(chǎn)的

37、單片集成兩端感溫電流源。它的主要特性如下：</p><p>　　（1）、流過器件的電流（A）等于器件所處環(huán)境的熱力學(xué)溫度（開爾文）度數(shù)。</p><p>　?。?）、AD590的測(cè)溫范圍為-55攝氏度～+150攝氏度。</p><p>　?。?）、AD590的電源電壓范圍為4V～30V。電源電壓可在4V～6V范圍變化，電流 變化1A，相當(dāng)于溫度變化1K。AD590可

38、以承受44V正向電壓和20V反向電壓，因而器件反接也不會(huì)被損壞。</p><p>　?。?）、輸出電阻為710M。</p><p>　?。?）、精度高。AD590共有I、J、K、L、M五檔，其中M檔精度最高，在-55攝氏度～+150攝氏度范圍內(nèi)，非線性誤差為±0.3攝氏度。</p><p><b>　　1、基本應(yīng)用電路</b><

39、/p><p>　　圖1（a）是AD590的封裝形式，圖1（b）是AD590用于測(cè)量熱力學(xué)溫度的基本應(yīng)用電路。因?yàn)榱鬟^AD590的電流與熱力學(xué)溫度成正比，當(dāng)電阻R1和電位器R2的電阻之和為1k時(shí)，輸出電壓VO隨溫度的變化為1mV/K。但由于AD590的增益有偏差，電阻也有誤差，因此應(yīng)對(duì)電路進(jìn)行調(diào)整。調(diào)整的方法為：把AD590放于冰水混合物中，調(diào)整電位器R2，使VO=273.2mV?；蛟谑覝叵?25度)條件下調(diào)整電位器,

40、使VO=273.2+25=298.2（mV）。但這樣調(diào)整只可保證在0度或25度附近有較高精度。</p><p>　　2、攝氏溫度測(cè)量電路</p><p>　　如圖2所示，電位器R2用于調(diào)整零點(diǎn)，R4用于調(diào)整運(yùn)放LF355的增益。調(diào)整方法如下：在0度時(shí)調(diào)整R2，使輸出VO=0，然后在100度時(shí)調(diào)整R4使VO=100mV。如此反復(fù)調(diào)整多次，直至0度時(shí)，VO=0mV，100度時(shí)VO=100mV為

41、止。最后在室溫下進(jìn)行校驗(yàn)。例如，若室溫為25度，那么VO應(yīng)為25mV。冰水混合物是0度環(huán)境，沸水為100度環(huán)境。</p><p>　　要使圖2中的輸出為200毫伏/攝氏度，可通過增大反饋電阻（圖中反饋電阻由R3與電位器R4串聯(lián)而成）來實(shí)現(xiàn)。另外，測(cè)量華氏溫度時(shí)，因華氏溫度等于熱力學(xué)溫度減去255.4再乘以9/5，故若要求輸出為1毫伏/華氏度，則調(diào)整反饋電阻約為180k，使得溫度為0攝氏度時(shí)， VO=17.8mV；

42、溫度為100攝氏度時(shí)，VO=197.8mV。AD581是高精度集成穩(wěn)壓器，輸入電壓最大為40V，輸出10V。</p><p>　　3、溫差測(cè)量電路及其應(yīng)用</p><p>　　(1). 電路與原理分析</p><p>　　圖3是利用兩個(gè)AD590測(cè)量?jī)牲c(diǎn)溫度差的電路。在反饋電阻為100k的情況下，設(shè)1#和2# AD590處的溫度分別為和 ，則輸出電壓為。圖中電位器R

43、2用于調(diào)零。電位器R4用于調(diào)整運(yùn)放LF355的增益。改變的值可以改變VO的大小。</p><p><b>　　(2). 應(yīng)用舉例</b></p><p>　　以某節(jié)能型藥材倉庫溫、濕度控制系統(tǒng)為例，若要求庫房溫度低于T攝氏度時(shí)，相對(duì)濕度低于A1B1%RH。則采取的兩種控制模式如下：</p><p>　　控制模式一：當(dāng)庫內(nèi)相對(duì)濕度高于A1B1%R

44、H且?guī)焱鉁囟鹊陀赥攝氏度時(shí)，進(jìn)行庫內(nèi)外通風(fēng)。這種方式是利用庫內(nèi)外濕度差進(jìn)行空氣的交換，以達(dá)到庫內(nèi)除濕的要求，其優(yōu)點(diǎn)是高效、節(jié)能、節(jié)省資金。但這種方式受到嚴(yán)格的控制。首先，庫外的相對(duì)濕度要低于庫內(nèi)的，它們之間的差要大于A2B2%RH，這樣才能有效保證及時(shí)地進(jìn)行庫內(nèi)的除濕。其次，庫內(nèi)庫外的溫度差要小于他們正常值的差，這是因?yàn)椋绻趲焱鉁囟冗h(yuǎn)高于庫內(nèi)溫度時(shí)進(jìn)行通風(fēng)，熱空氣進(jìn)入庫區(qū)后遇上冷空氣就會(huì)造成藥品、器材表面結(jié)露的現(xiàn)象，進(jìn)而影響藥品和器

45、材的質(zhì)量。反之，如果在庫內(nèi)溫度遠(yuǎn)高于庫外溫度時(shí)進(jìn)行通風(fēng)，冷空氣進(jìn)入庫內(nèi)后也會(huì)在藥品器材表面結(jié)露。另外，庫外溫度不能接近T攝氏度。這是因?yàn)?，如果庫外溫度接近T攝氏度時(shí)進(jìn)行通風(fēng)，很可能使密閉的庫溫升高，從而超過溫度上限T攝氏度。</p><p>　　控制模式二：當(dāng)溫度高于T攝氏度或濕度高于A1B1%RH但不滿足第一種情況時(shí)，開啟冷凍空調(diào)機(jī)組進(jìn)行庫內(nèi)降溫除濕。</p><p>　　為避免因庫內(nèi)外

46、溫差過大通風(fēng)時(shí)藥品、器材表面結(jié)露的現(xiàn)象，必須嚴(yán)格控制系統(tǒng)溫差值的精度。傳統(tǒng)的測(cè)溫差方法是對(duì)兩點(diǎn)溫度分別進(jìn)行處理（調(diào)理電路、A/D、運(yùn)算處理）后求差值，此方法所得溫差精度低。庫內(nèi)外溫差測(cè)量可采用圖3所示電路，利用溫差值直接與設(shè)定值相比較，既能保證較高的精度，又簡(jiǎn)化了系統(tǒng)的軟件設(shè)計(jì)，提高了系統(tǒng)的可靠性。</p><p>　　4、N點(diǎn)最低溫度值的測(cè)量</p><p>　　將不同測(cè)溫點(diǎn)上的數(shù)個(gè)AD

47、590相串聯(lián)，可測(cè)出所有測(cè)量點(diǎn)上的溫度最低值。</p><p>　　該方法可應(yīng)用于測(cè)量多點(diǎn)最低溫度的場(chǎng)合。</p><p>　　5、N點(diǎn)溫度平均值的測(cè)量</p><p>　　把N個(gè)AD590并聯(lián)起來，將電流求和后取平均，則可求出平均溫度。</p><p>　　該方法適用于需要多點(diǎn)平均溫度但不需要各點(diǎn)具體溫度的場(chǎng)合。</p>&l