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传感器与测试技术试卷及答案

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电磁传感器,流量传感器,压力传感器
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资料简介
 一、填空

1. 测试技术的基本任务是                                         

2. 从时域看,系统的输出是其输入与该系统               的卷积。

3. 信号的时域描述,以        为独立变量;而信号的频域描述,以        为独立变量。

4. 如果一个信号的zui高频率为50Hz,为了防止在时域采样过程中出现混叠现象,采样频率应该大于        Hz

5. 在桥式测量电路中,根据其              的性质,可将其分为直流电桥与交流电桥。

6. 金属电阻应变片与半导体应变片的主要区别在于:前者利用                引起的电阻变化,后者利用                  变化引起的电阻变化。 

7. 压电式传感器是利用某些物质的                 而工作的。

8. 带通滤波器的上下限截止频率为fc2fc1,其带宽B =                    ;若其带宽为1/3倍频程则fc2  =            fc1

9. 属于能量控制型的传感器有               、            等。

10.根据载波受调制的参数不同,调制可分为                、       

11.相关滤波的工作原理是                                           

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2. <\/span>从时域看,系统的输出是其输入与该系统<\/span>               <\/span>的卷积。<\/span><\/o:p><\/span><\/p>

3. <\/span>信号的时域描述,以<\/span>        <\/span>为独立变量;而信号的频域描述,以 <\/span>       <\/span>为独立变量。<\/span><\/o:p><\/span><\/p>

4. <\/span>如果一个信号的zui高频率为50<\/font><\/span>Hz<\/span>,为了防止在时域采样过程中出现混叠现象,采样频率应该大于<\/span>   <\/span>   <\/span>  <\/span>Hz<\/span>。<\/span><\/o:p><\/span><\/p>

5. <\/span>在桥式测量电路中,根据其<\/span>              <\/span>的性质,可将其分为直流电桥与交流电桥。<\/span><\/o:p><\/span><\/p>

6. <\/span>金属电阻应变片与半导体应变片的主要区别在于:前者利用<\/span>                <\/span>引起的电阻变化,后者利用<\/span>                  <\/span>变化引起的电阻变化。 <\/span><\/o:p><\/span><\/p>

7. <\/span>压电式传感器是利用某些物质的<\/span>                 <\/span>而工作的。<\/span><\/o:p><\/span><\/p>

8. <\/span>带通滤波器的上下限截止频率为<\/span>fc<\/span>2<\/span>、<\/span>fc<\/span><\/span>1<\/span>,其带宽<\/span>B<\/span> <\/span>=<\/span> <\/span>     <\/span>     <\/span>  <\/span> <\/span>     <\/span> <\/span>;若其带宽为1/3<\/font>倍频程则<\/font><\/span>fc<\/span>2<\/span>  <\/span>=<\/span> <\/span>    <\/span>    <\/span>   <\/span>fc<\/span>1<\/span>。<\/span><\/o:p><\/span><\/p>

9. <\/span>属于能量控制型的传感器有 <\/span>             <\/span> 、<\/span>            <\/span>等。<\/span><\/o:p><\/span><\/p>

10.<\/span>根据载波受调制的参数不同,调制可分为<\/span>        <\/span>、<\/span>       <\/span> 、<\/span>       <\/span>。<\/span><\/o:p><\/span><\/p>

11.<\/span>相关滤波的工作原理是<\/span>                                           <\/span>
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