電大傳感器與檢測技術(shù)期末考試試題、試卷小抄參考

1、專業(yè)好文檔傳感器與檢測技術(shù)試題（5）一、單項(xiàng)選擇題(本大題共10小題，每小題2分，共20分)在每小題列出的四個(gè)選項(xiàng)中只有一個(gè)選項(xiàng)是符合題目要求的，請將正確選項(xiàng)前的字母填在題后的括號內(nèi)。1.屬于傳感器動態(tài)特性指標(biāo)的是( ) a.遲滯 b.過沖量 c.穩(wěn)定性 d.線性度2.傳感器能感知的輸入變化量越小， 表示傳感器的( ) a.線性度越好 b.遲滯越小 c.重復(fù)性越好 d.分辨力越高3.我國省、部一級計(jì)量站使用的一等標(biāo)準(zhǔn)測力機(jī)所允許的測量誤差為( ) a.0.1% b.0.01% c.0.001% d.0.0001%4.感應(yīng)同步器的作用是測量( ) a.電壓 b.電流 c.位移 d.相位差5.下列

2、測力傳感器中，屬于發(fā)電型測力傳感器的是( ) a.自感式傳感器 b.磁電感應(yīng)式傳感器 c.電容式傳感器 d.應(yīng)變式傳感器6.視覺傳感器的掃描部的主作用是( ) a.聚成光學(xué)圖像信號 b.將光學(xué)圖像信號轉(zhuǎn)換成電信號 c.將二維圖像信號轉(zhuǎn)換為時(shí)間序列一維信號 d.抽出有效信號7.熱敏電阻式濕敏元件能夠直接檢測( ) a.溫度 b.溫度差 c.相對濕度 d.絕對濕度8.在采樣保持環(huán)節(jié)中，采樣開關(guān)被斷開的時(shí)間稱為( ) a.采樣時(shí)間 b.保持時(shí)間 c.采樣周期 d.緩沖時(shí)間9.封裝在光電隔離耦合器內(nèi)部的是( ) a.一個(gè)發(fā)光二極管和一個(gè)發(fā)光三極管 b.一個(gè)光敏二極管和一個(gè)光敏三極管 c.兩個(gè)發(fā)光二極管

3、或兩個(gè)光敏三極管 d.一個(gè)發(fā)光二極管和一個(gè)光敏三極管10.已知信號x(t)與信號y(t)完全不相關(guān)，則該二信號的互相關(guān)系數(shù)滿足( ) a.xy()1 b.xy()=1 c.0xy()1 d.xy()=0二、填空題(本大題共5小題，每小題2分，共10分)1.運(yùn)算100%是計(jì)算傳感器_的公式。2.當(dāng)環(huán)境濕度改變時(shí)，必須對電容式傳感器重新進(jìn)行靜態(tài)_。3.要使直流電橋平衡，必須使電橋相對臂電阻值的_相等。4.紅外圖像傳感器通常由紅外敏感元件和電子_電路組成。5.在熱電偶中，當(dāng)引入第三個(gè)導(dǎo)體時(shí)，只要保持其兩端的溫度相同，則對總熱電動勢無影響。這一結(jié)論被稱為熱電偶的_定律。三、問答題(本大題共5小題，每小

4、題4分，共20分)1.壓電式傳感器往往采用多片壓電晶片串聯(lián)或并聯(lián)方式，當(dāng)采用多片壓電晶片并聯(lián)方式時(shí)，適合于測量何種信號?2.就某一確定的差動變壓器式位移傳感器而言，當(dāng)激勵(lì)電壓的幅值恒定時(shí)，其輸出電壓的幅值和相位分別取決于被測位移的哪些信息?3.簡述半導(dǎo)體p-n結(jié)溫度傳感器的工作機(jī)理。4.熱電型紅外光導(dǎo)攝像管與可見光光導(dǎo)攝像管在電路中所采用的前置放大器有何差別?為什么?5.有源濾波器與無源濾波器相比有哪些優(yōu)點(diǎn)?四、計(jì)算題(本大題共2小題，每小題15分，共30分)1.某位移傳感器在校準(zhǔn)時(shí)測得的數(shù)據(jù)如下表，若該傳感器的線性表達(dá)式為x=a0+a1n，試用最小二乘法()計(jì)算a0和a1。脈沖數(shù)ni1020

5、304050位移值xi(mm)0.40.52.圖示串聯(lián)式測溫電路，其中rt=r01+(t-t0)為感溫?zé)犭娮?，rs為常值電阻，e為工作電壓，u0為輸出電壓，=0.02/.當(dāng)給定溫度為0，rt的電阻值為10k，若測溫范圍為 0400，輸出電壓u0的范圍是1v5v，試計(jì)算工作電壓e和常值電阻rs各取多少?()五、應(yīng)用題(本大題共2小題，每小題10分，共20分)1.用微型計(jì)算機(jī)、模/數(shù)轉(zhuǎn)換(a/d)板、濾波器、電荷放大器、壓電式力傳感器和打印機(jī)組成一個(gè)測力系統(tǒng)，試畫出該測力系統(tǒng)的方框圖。1. 圖1所示矩形函數(shù)x(t)的頻譜為x()=asinc()，求圖2所示信號y(t)的頻譜，并畫

6、出其幅值譜圖。(sincx=)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 international toure to discuss his complaint.cska

7、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 money from somebody to pay them.it is a nonsense to ha

8、ve 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. but it is only with harsh sanctions that racism and

9、 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 premier league match at chelsea on sunday.i am going to

10、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 racist behaviour of their fans duringcitys 2-1 win.miche

11、l 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 racist insults from fans of cska.baumgartner the dis

12、appointing 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 humidity and limited cloud cover. the balloon, with ca

13、psule 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 of commercial airliners (5.6 miles/9.17 kilometers

14、) 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 resembling an olympic diving platform.below, the ea

15、rth 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 shallow end.skydiver preps for the big jumpwhen he jump

16、s, 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,

17、 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 au