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1、专业好文档高等教育自学考试全国统一命题传感器与检测技术答案一、单项选择题（本大题共12小题，每小题2分，共24分）1B 2C 3D 4A 5C 6D 7D 8D 9C 10B 11A 12A二、填空题（本大题共12小题，每小题1分，共12分）13灵敏度 14能量15动态 16测量范围 170.05 18应变19低 20放大 21特征（或几何特征） 22介质（或介电常数或）23地 24三态三、简答题（本大题共6小题，每小题4分，共24分）25（1）当铁芯处于零位或中间位置时，此时输出的电压被称为零点残余电压。 （2）零点残余电压可能造成测量误差。26波登管在压力p的作用下，其末端产生位移，带动霍
2、尔元件在均匀梯度的的磁场中运动。当霍尔元件通入恒定电流时，使产生与被测压力成正比的霍尔电势，完成压力电压（势）的转换。27（1）不能。 （2）因为电涡流效应只能在铁磁性材料上产生。28借助A/D转换器将明亮度信息数字化，从而形成由象素组成的数字图像，并输入计算机。29下图中的热电动势EabEabc表示了热电偶式温度传感器的中间导体定律。答29图30多路模拟开关模拟调理电路采样保持电路和ADC逻辑控制电路（注：用框图表示也可。）四、计算题（本大题共3小题，每小题8分，共24分）31（1）系统的总灵敏度 （2）笔尖位移的偏移量为 32热敏电阻的一般表达式为： 式中：RT为温度T=t+273.15(
3、K)时的热敏电阻的电阻值；R0为温度T0=t0+273.15(K)时的热敏电阻的电阻值； 设t00时，则有 （1） （2） 由式（1）、（2）可得 33（1） 1.54（V） （2）分辨率：五、应用题（本大题共2小题，每小题8分，共16分）34 R7.24k解以上两式，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-pre
4、sident 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 F
5、ifa 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 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
6、 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 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
7、in London 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
8、find 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 su
9、rprised 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
10、 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 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
11、 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) 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
12、 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 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,
13、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 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
14、 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 be deployed to slow him down. His team hopes its not needed. Instead, he plans to deploy his 270-square-foot
15、 (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 at mach speeds.Even if everything goes as planned, it wont. Baumgartner still will free fall at a speed that would cause you and me to pass out, and no parachute is guaranteed to work higher than 25,000 feet (7,620 meters).cause there第 4 页 共 4 页