《传感器应用技术》期中考试试卷

《传感器应用技术》期中考试试卷
《传感器应用技术》期中考试试卷

二、选择题(每题 2 分,共20分)

1、在光的作用下,电子吸收光子能量从键合状态过渡到自由状态,引起物体电阻率的变化,这种现象称为( )

A 磁电效应

B 声光效应

C 光生伏特效应

D 光电导效应

2、利用测量仪表指针相对于刻度初始点的位移来决定被测量的方法称为( )

A 零位式测量

B 微差式测量

C 偏差式测量

D 直接测量

3、( )又可分为累进性的、周期性的和按复杂规律变化的几种类型。

A 系统误差

B 变值系统误差

C 恒值系统误差

D 随机误差

4、传感器的静态特性包括( )(1) 灵敏度(2)分辨力(3)线性度(4)迟滞

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A (1)(2)

B (1)(3)

C (1) (2)(4)

D (1) (2)(3)(4)

5、按照测量过程的特点可以将测量方法分为()。

A 直接测量和间接测量

B 偏差式测量和零位式测量

C 接触式测量和非接触式测量

D 静态测量和动态测量

6、光电传感器的基本原理是物质的()。

A、压电效应

B、光电效应

C、磁电效应

D、热电效应

7、红外线遥控的接收装置不包括()。

A、光滤波器C、编码调制放大电路

B、光敏二级管D、微处理器

8、红外辐射是由物体内部分子运动产生的,这类运动和物体的()有关。

A、密度C、质量

B、温度D、体积

9、光纤通信中,与出射光纤耦合的光电元件是()。

A、光敏电阻C、光敏二极管

B、光敏三极管D、光电池

10、欲利用光电池驱动电动车,需将数片光电池以提高输出电压,再将几组光电池起来,以提高输出电流。()

A、串联,并联

B、串联,串联

C、并联,串联

D、并联,并联

三、判断题(每题 1 分,共10 分

正确的划√、错误的划X,填在题后

括号内。)

1、光敏二级管是利用外光电效应制成的。()

2、人造卫星的光电池扳利用了光电效应。()

3、温度升高,光敏三极管的暗电流下降。()

4、粗大误差是由于测量者粗心大意或测量仪表突然

出现故障等造成的。()

5、转换元件是将中间非电量转换成电量输出的元

件。()

6、光电池是利用内光电效应制成的。()

7、量子型红外线传感器是基于热电效应原理制成

的。()

8、纤芯的材料主要是半导体制成的圆柱体。()

9、光电传感器属于接触型测量。()

10、脉冲式光电传感器是一种将被测量转换为脉冲

信号的传感器。()

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四、简答题(4题,共50 分)

1、什么是系统误差?(10分)

2、什么是传感器?(10分)答:

3、简要叙述光敏电阻的伏安特性,并画出伏安特性曲线图?(20分)

4、光敏二极管与普通二极管有什么区别?(10分)

评卷人得分

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