電大傳感器與檢測(cè)技術(shù)自學(xué)考試試卷小抄參考

1、高等教育自學(xué)考試全國(guó)統(tǒng)一命題傳感器與檢測(cè)技術(shù)答案一、單項(xiàng)選擇題（本大題共12小題，每小題2分，共24分）1b 2c 3d 4a 5c 6d 7d 8d 9c 10b 11a 12a二、填空題（本大題共12小題，每小題1分，共12分）13靈敏度 14能量15動(dòng)態(tài) 16測(cè)量范圍 170.05 18應(yīng)變19低 20放大 21特征（或幾何特征） 22介質(zhì)（或介電常數(shù)或）23地 24三態(tài)三、簡(jiǎn)答題（本大題共6小題，每小題4分，共24分）25（1）當(dāng)鐵芯處于零位或中間位置時(shí)，此時(shí)輸出的電壓被稱為零點(diǎn)殘余電壓。 （2）零點(diǎn)殘余電壓可能造成測(cè)量誤差。26波登管在壓力p的作用下，其末端產(chǎn)生位移，帶動(dòng)霍爾元件在均

2、勻梯度的的磁場(chǎng)中運(yùn)動(dòng)。當(dāng)霍爾元件通入恒定電流時(shí)，使產(chǎn)生與被測(cè)壓力成正比的霍爾電勢(shì)，完成壓力電壓（勢(shì)）的轉(zhuǎn)換。27（1）不能。 （2）因?yàn)殡姕u流效應(yīng)只能在鐵磁性材料上產(chǎn)生。28借助a/d轉(zhuǎn)換器將明亮度信息數(shù)字化，從而形成由象素組成的數(shù)字圖像，并輸入計(jì)算機(jī)。29下圖中的熱電動(dòng)勢(shì)eabeabc表示了熱電偶式溫度傳感器的中間導(dǎo)體定律。答29圖30多路模擬開(kāi)關(guān)模擬調(diào)理電路采樣保持電路和adc邏輯控制電路（注：用框圖表示也可。）四、計(jì)算題（本大題共3小題，每小題8分，共24分）31（1）系統(tǒng)的總靈敏度 （2）筆尖位移的偏移量為 32熱敏電阻的一般表達(dá)式為： 式中：rt為溫度t=t+273.15(k)時(shí)的熱

3、敏電阻的電阻值；r0為溫度t0=t0+273.15(k)時(shí)的熱敏電阻的電阻值； 設(shè)t00時(shí)，則有 （1） （2） 由式（1）、（2）可得 33（1） 1.54（v） （2）分辨率：五、應(yīng)用題（本大題共2小題，每小題8分，共16分）34 r7.24k解以上兩式，可得：rf22.2 k，rf41.6 k35均值 均方值 if we dont do that it will go on and go on. we have to stop it; we need the courage to do it.his comments came hours after fifa vice-presiden

4、t jeffrey webb - also in london for the fas celebrations - said he wanted to meet ivory coast international toure to discuss his complaint.cska general director roman babaev says the matter has been exaggerated by the ivorian and the british media.blatter, 77, said: it has been decided by the fifa c

5、ongress that it is a nonsense for racism to be dealt with with fines. you can always find money from somebody to pay them.it is a nonsense to have matches played without spectators because it is against the spirit of football and against the visiting team. it is all nonsense.we can do something bett

6、er to fight racism and discrimination.this is one of the villains we have today in our game. but it is only with harsh sanctions that racism and discrimination can be washed out of football.the (lack of) air up there watch mcayman islands-based webb, the head of fifas anti-racism taskforce, is in lo

7、ndon for the football associations 150th anniversary celebrations and will attend citys premier league match at chelsea on sunday.i am going to be at the match tomorrow and i have asked to meet yaya toure, he told bbc sport.for me its about how he felt and i would like to speak to him first to find

8、out what his experience was.uefa hasopened disciplinary proceedings against cskafor the racist behaviour of their fans duringcitys 2-1 win.michel platini, president of european footballs governing body, has also ordered an immediate investigation into the referees actions.cska said they were surpris

9、ed and disappointed by toures complaint. in a statement the russian side added: we found no racist insults from fans of cska.baumgartner the disappointing news: mission aborted.the supersonic descent could happen as early as sunda.the weather plays an important role in this mission. starting at the

10、ground, conditions have to be very calm - winds less than 2 mph, with no precipitation or humidity and limited cloud cover. the balloon, with capsule attached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. it will climb higher than the tip

11、of mount everest (5.5 miles/8.85 kilometers), drifting even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and into the stratosphere. as he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.the balloon will slowly drift to the

12、edge of space at 120,000 feet ( then, i would assume, he will slowly step out onto something resembling an olympic diving platform.below, the earth becomes the concrete bottom of a swimming pool that he wants to land on, but not too hard. still, hell be traveling fast, so despite the distance, it wi

13、ll not be like diving into the deep end of a pool. it will be like he is diving into the shallow end.skydiver preps for the big jumpwhen he jumps, he is expected to reach the speed of sound - 690 mph (1,110 kph) - in less than 40 seconds. like hitting the top of the water, he will begin to slow as h

14、e approaches the more dense air closer to earth. but this will not be enough to stop him completely.if he goes too fast or spins out of control, he has a stabilization parachute that can be deployed to slow him down. his team hopes its not needed. instead, he plans to deploy his 270-square-foot (25-square-meter) main chute at an altitude of around 5,000 feet (1,524 meters).in order to deploy this chute successfully, he will have to slow to 172 mph (277 kph). he will have a reserve parachute that will open automatically if he loses consciousness