電大傳感器與檢測(cè)技術(shù)_自學(xué)考試試卷200410小抄參考

1、專業(yè)好文檔高等教育自學(xué)考試全國(guó)統(tǒng)一命題考試傳感器與檢測(cè)技術(shù) 試卷(課程代碼2202)本試卷共6頁(yè)，滿分100分，考試時(shí)間150分鐘?？?分題 號(hào)一二三四五核分人題 分2412242416復(fù)查人得 分一、單項(xiàng)選擇題(本大題共12小題，每小題2分共24分)在每小題列出的四個(gè)備選項(xiàng)中只有一個(gè)是符合題目要求的，請(qǐng)將其代碼填寫在題后的括號(hào)內(nèi)。錯(cuò)選、多選或未選均無(wú)分。1屬于傳感器動(dòng)態(tài)特性指標(biāo)之一的是 【 】 a靈敏度 b固有頻率 c線性度 d重復(fù)性2采用直流放大器對(duì)微弱的、變化緩慢的信號(hào)進(jìn)行放大時(shí)，影響測(cè)量精度的主要原因是 【 】 a零點(diǎn)漂移 b信號(hào)微弱 c放大倍數(shù)不足 d噪聲干擾3變極距型電容式位移傳感

2、器的初始極距=0.1mm，為保證測(cè)量的線性度，應(yīng)使被測(cè)位移量滿足 【 】 a0.1mm b0.1mm c0.1mm d0.1mm4電荷放大器是一個(gè)具有反饋電容的高增益運(yùn)算放大器。該運(yùn)算放大器的輸入阻抗應(yīng) 【 】 a109 c1012 5在相同工作條件下，對(duì)同一被測(cè)物理量進(jìn)行多次連續(xù)測(cè)量所得結(jié)果的一致性越好，說(shuō)明該傳感器的 【 】 a線性度越好 b靈敏度越高 c重復(fù)性越好 d穩(wěn)定性越好6固體半導(dǎo)體攝像機(jī)的感光部分是 【 】 a光電轉(zhuǎn)換及放大元件 b電荷耦臺(tái)器件 c熱電元件 d光導(dǎo)攝像管7有源濾波器由運(yùn)算放大器和 【 】 arc網(wǎng)絡(luò)組成 brl網(wǎng)絡(luò)組成 clc網(wǎng)絡(luò)組成 drlc網(wǎng)絡(luò)組成8發(fā)光二極管

3、顯示器的英文縮寫為 【 】 alcd bled cbcd dcrt9靜電屏蔽的作用在于消除靜電荷對(duì)測(cè)量?jī)x器產(chǎn)生的 【 】 a高次諧波干擾 b放電干擾 c靜電場(chǎng)干擾 d漏電流干攏10由rlc串聯(lián)網(wǎng)絡(luò)組成的帶通濾波器的中心頻率為500hz，帶寬為200hz，則品質(zhì)因數(shù)為 【 】 a0.4 b0.8 c2.5 d511已知一信號(hào)的直流分量為零，交流分量的幅值不為零，則該信號(hào)的 【 】 a方差等于均方值 b方差等于零 c均值等于均方值 d均方值等于零12信號(hào)x(t)與信號(hào)y(t)為頻率相同、幅值不同、相位差恒定的兩個(gè)周期信號(hào)，則其互相關(guān)函數(shù)rxy ()與這兩個(gè)信號(hào)的 【 】 a頻率無(wú)關(guān)，相位差無(wú)關(guān) b

4、頻率有關(guān)，相位差有關(guān) c頻率無(wú)關(guān)相位差有關(guān) d頻率有關(guān)，相位差無(wú)關(guān)二、填空題(本大題共12小題，每小題1分，共12分)請(qǐng)?jiān)诿啃☆}的空格中填上正確答案。錯(cuò)填、不填均無(wú)分。13用表格法進(jìn)行傳感器輸出線性化處理的實(shí)質(zhì)是_線性補(bǔ)償。14對(duì)傳感器輸入相同幅值、不同頻率的正弦信號(hào)，測(cè)量傳感器的輸出特性，這種試驗(yàn)是對(duì)傳感器進(jìn)行_標(biāo)定。15電位計(jì)式位移傳感器的電阻靈敏度與電位計(jì)電阻元件的有效長(zhǎng)度成反比，與電位計(jì)的總電阻成_。16用電渦流位移傳感器測(cè)量旋轉(zhuǎn)軸的轉(zhuǎn)速，其測(cè)速齒輪必須用_材料制成。17硅芯片式流速傳感器的輸出信號(hào)與流速的_成線性關(guān)系。18磁柵式位移傳感器的磁頭在動(dòng)或不動(dòng)的情況下都有感應(yīng)電動(dòng)勢(shì)輸出的是

5、_磁頭。19氣敏元件表面吸附被測(cè)氣體時(shí)，它的_將發(fā)生變化。20亮度式溫度傳感器和比色式溫度傳感器都屬于_式溫度傳感器。21不能準(zhǔn)確預(yù)測(cè)未來(lái)瞬時(shí)值，也無(wú)法用確切的數(shù)學(xué)關(guān)系式描述的信號(hào)稱為_(kāi) _。22自功率譜是描述隨機(jī)信號(hào)在_域的特征函數(shù)。23若在時(shí)域?qū)⑿盘?hào)壓縮，則在頻域其頻譜將_。24對(duì)機(jī)械結(jié)構(gòu)施加某種預(yù)定要求的作用力，使之發(fā)生振動(dòng)，稱之為_(kāi)。三、問(wèn)答題(本大題共6小題，每小題4分共24分)25現(xiàn)有數(shù)字電壓表、放大器、信號(hào)發(fā)生器、功率放大器、振動(dòng)臺(tái)、標(biāo)準(zhǔn)傳感器、被標(biāo)定的傳感器等。請(qǐng)?jiān)O(shè)計(jì)一個(gè)用比較法對(duì)被標(biāo)定傳感器進(jìn)行動(dòng)態(tài)標(biāo)定的系統(tǒng)，并簡(jiǎn)要說(shuō)明標(biāo)定原理。26在采用壓電式傳感器的測(cè)量系統(tǒng)中，電荷放大器

6、的作用是什么?27說(shuō)明人工視覺(jué)系統(tǒng)中圖像輸入部分的功能。28簡(jiǎn)述結(jié)露傳感器在磁帶錄像機(jī)中的應(yīng)用情況。29簡(jiǎn)述利用算術(shù)平均值法進(jìn)行數(shù)字濾波時(shí)的過(guò)程，并寫出計(jì)算公式。 30說(shuō)明如圖所示的周期矩形信號(hào)x(t)與非周期矩形信號(hào)x1(t)在頻譜結(jié)構(gòu)上的差異和關(guān)系。四、計(jì)算題(本大題共3小題。每小題8分。共24分)31一壓電式加速度傳感器，其靈敏度為：k150pc/(ms-2)，與其相接的電荷放大器靈敏度為：k20.006v/pc，記錄儀靈敏度為：k320mm/v (1)求系統(tǒng)總靈敏度k0 (2)若記錄儀記錄到的曲線高度為57mm，求此時(shí)所對(duì)應(yīng)的加速度。321下圖給出了一種測(cè)溫范圍為0100的測(cè)溫電路，其

7、中r1=10(1+0005t)k ,感溫?zé)犭娮瑁籸0 =10k，工作電壓e=10v，m，n兩點(diǎn)的電位差為輸出電壓。計(jì)算該測(cè)溫電路的平均靈敏度。 題32圖33已知鉑銠鉑熱電偶在冷端為0時(shí)的熱電動(dòng)勢(shì)如下表，寫出該熱電偶在冷端為20時(shí)的熱電動(dòng)勢(shì)表(自40至100)。t()20406080100e(t,0)(mv)0.1130.2350.3640.5000.643五、應(yīng)用題（本大題共2小題，每題8分，共16分）34. 一霍爾傳感器和帶齒圓盤組成轉(zhuǎn)速測(cè)量裝置，經(jīng)放大器和記錄儀，其輸出信號(hào)如記錄紙圖所示。 (1)若齒輪齒數(shù)為z=14，求被測(cè)轉(zhuǎn)速為每分鐘多少轉(zhuǎn)? (2)用金屬鋁作為帶齒圓盤，是否可行，為什么

8、?35分析以下有關(guān)濾波器的問(wèn)題 (1)推導(dǎo)圖示濾波器的頻率特性表達(dá)式。 (2)畫出幅頻特性示意圖。(3)指出該電路具有何種濾波作用?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-president jeffrey webb - also in london for the fas celebrations - said he wanted to meet ivory coast

9、 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 congress that it is a nonsense for racism to be dealt with with fines. you can always find mon

10、ey 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 better to fight racism and discrimination.this is one of the villains we have today in our game.

11、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 london for the football associations 150th anniversary celebrations and will attend citys premi

12、er 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 out what his experience was.uefa hasopened disciplinary proceedings against cskafor the racis

13、t 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 surprised and disappointed by toures complaint. in a statement the russian side added: we found no r

14、acist 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 ground, conditions have to be very calm - winds less than 2 mph, with no precipitation or hum

15、idity 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 of mount everest (5.5 miles/8.85 kilometers), drifting even higher than the cruising altitude

16、 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 edge of space at 120,000 feet ( then, i would assume, he will slowly step out onto something

17、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 will not be like diving into the deep end of a pool. it will be like he is diving into the shal

18、low 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 he 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