广东工业大学传感器技术及应用复习资料 779.22KB

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一、基本概念与原理（6 小题，每小题 10 分，共 60 分） 1、传感器电路工作原理分析题 3*2（包括画波形图） {课件、课外作业、课后习题、测量手段（偏位式测量、零位式测量、微差式测量）判断说明题} 2、计算题 3*2（课件、课外作业、课后习题）二、影响因素分析（1 小题， 10 分） 1、影响因素分析题 1*2 （课件中测量转换电路电路或应用电路）三、方案设计（3 小题，每小题 10 分，共 30 分） 1、基本设计题 1*2（针对物理量测量；针对特定应用） 2、灵活设计题 1*2 （同一传感原理的多种测量转换电路；不同传感原理实现同一物理量测量） 3、改进设计题 1*2 （有缺点的测量转换电路；错误的测量转换电路）教材习题中的原理分析题、计算题及设计题第二章： 2-5、 2-6、 2-7、 2-9、 2-11、 2-13、 2-14 第三章： 3-5、 3-7、 3-8 第四章： 4-3、 4-8、 4-9 第五章： 5-2、 5-7 第六章： 6-2、 6-4、 6-5 第七章： 7-3、 7-5、 7-6 第八章：

<link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/base.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/css/fancy.min.css" rel="stylesheet"/><link href="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89500839/raw.css" rel="stylesheet"/><div id="sidebar" style="display: none"><div id="outline"></div></div><div class="pf w0 h0" data-page-no="1" id="pf1"><div class="pc pc1 w0 h0"><img alt="" class="bi x0 y0 w1 h1" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89500839/bg1.jpg"/><div class="c x0 y1 w2 h0"><div class="t m0 x1 h2 y2 ff1 fs0 fc0 sc0 ls0 ws0">广东工业大学试卷用纸，第<span class="ff2">1</span>页，共<span class="ff2">6</span>页<span class="ff3"> </span></div></div><div class="c x2 y3 w3 h3"><div class="t m1 x3 h4 y4 ff4 fs1 fc0 sc0 ls0 ws0"> <span class="_ _0"> </span><span class="ff5">诚信考试，诚信做人。</span></div><div class="t m1 x3 h4 y5 ff4 fs1 fc0 sc0 ls0 ws0"> </div><div class="t m1 x4 h5 y6 ff1 fs2 fc0 sc1 ls0 ws0">学院<span class="_ _1"></span>：专<span class="_ _1"></span>业：<span class="_ _1"></span>班</div><div class="t m1 x4 h5 y7 ff6 fs2 fc0 sc0 ls0 ws0"> <span class="_"> </span><span class="ff1 sc1">级<span class="_ _1"></span>学号<span class="_ _1"></span>：</span></div><div class="t m1 x4 h6 y8 ff1 fs2 fc0 sc1 ls1 ws0">姓名<span class="sc0 ls0">：<span class="ff3"> </span></span></div><div class="t m1 x5 h7 y6 ff3 fs3 fc0 sc0 ls0 ws0"> </div><div class="t m1 x6 h8 y9 ff1 fs0 fc0 sc0 ls0 ws0">装<span class="ff2"> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> </span></div><div class="t m1 x6 h8 ya ff1 fs0 fc0 sc0 ls0 ws0">订<span class="ff2"> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_ _2"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> </span></div><div class="t m1 x6 h2 yb ff1 fs0 fc0 sc0 ls0 ws0">线<span class="ff3"> </span></div></div><div class="c x0 y1 w2 h0"><div class="t m0 x7 h6 yc ff3 fs2 fc0 sc0 ls0 ws0"><span class="fc2 sc0"> </span></div></div><div class="c x8 yd w4 h9"><div class="t m0 x9 ha ye ff7 fs4 fc0 sc1 ls0 ws0">广东工业<span class="_ _3"></span>大学考试<span class="_ _3"></span>试卷<span class="ff8"> (<span class="_ _3"></span> A )<span class="ff9 fs5"> </span></span></div><div class="t m0 xa h5 yf ff9 fs2 fc0 sc1 ls0 ws0">2021 --2022 <span class="ff1">学年度第</span> 2 <span class="ff1">学期</span> </div><div class="t m0 xb hb y10 ff9 fs6 fc0 sc1 ls0 ws0"> </div><div class="t m0 xc hc y11 ff1 fs7 fc0 sc1 ls0 ws0">课程名称<span class="_ _3"></span><span class="ff9">: <span class="sc0"> <span class="ff1">传感器技术及应用</span> </span> </span>学分<span class="ff9 sc0"> 2 </span>试卷<span class="_ _3"></span>满分<span class="_ _0"> </span><span class="ff9 sc0">10<span class="_ _1"></span>0 <span class="ff1 sc1">分</span> </span></div><div class="t m0 xc hc y12 ff1 fs7 fc0 sc1 ls2 ws0">考试<span class="ls0">形式：<span class="sc0">闭卷<span class="ff9"> <span class="fc1 sc2">(<span class="ff1">开卷<span class="_ _3"></span>或<span class="ls2">闭卷</span></span>) </span><span class="sc1"> </span></span></span></span></div></div><div class="c xd y13 w5 hd"><div class="t m0 xe h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">题<span class="ff9"> </span>号<span class="ff9"> </span></div></div><div class="c xf y13 w6 hd"><div class="t m0 xe h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">一<span class="ff9"> </span></div></div><div class="c x10 y13 w7 hd"><div class="t m0 xe h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">二<span class="ff9"> </span></div></div><div class="c x11 y13 w7 hd"><div class="t m0 xe h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">三<span class="ff9"> </span></div></div><div class="c x12 y13 w8 hd"><div class="t m0 xe h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">四<span class="ff9"> </span></div></div><div class="c x13 y13 w7 hd"><div class="t m0 xe h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">五<span class="ff9"> </span></div></div><div class="c x14 y13 w7 hd"><div class="t m0 xe h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">六<span class="ff9"> </span></div></div><div class="c x15 y13 w6 hd"><div class="t m0 xe h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">七<span class="ff9"> </span></div></div><div class="c x16 y13 w9 hd"><div class="t m0 xe h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">八<span class="ff9"> </span></div></div><div class="c x17 y13 w7 hd"><div class="t m0 xe h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">九<span class="ff9"> </span></div></div><div class="c x18 y13 w7 hd"><div class="t m0 xe h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">十<span class="ff9"> </span></div></div><div class="c x19 y13 wa hd"><div class="t m0 xb h5 y14 ff1 fs2 fc0 sc0 ls0 ws0">总分<span class="ff9"> </span></div></div><div class="c xd y15 w5 he"><div class="t m0 x1a h5 y16 ff1 fs2 fc0 sc0 ls0 ws0">评卷得分<span class="ff9"> </span></div></div><div class="c xf y15 w6 he"><div class="t m0 x1b hf y16 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x10 y15 w7 he"><div class="t m0 x1b hf y16 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x11 y15 w7 he"><div class="t m0 x1b hf y16 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x12 y15 w8 he"><div class="t m0 x1b hf y16 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x13 y15 w7 he"><div class="t m0 x0 hf y16 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x14 y15 w7 he"><div class="t m0 x1b hf y16 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x15 y15 w6 he"><div class="t m0 x1b hf y16 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x16 y15 w9 he"><div class="t m0 x1b hf y16 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x17 y15 w7 he"><div class="t m0 x1b hf y16 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x18 y15 w7 he"><div class="t m0 x1b hf y16 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x19 y15 wa he"><div class="t m0 x1c hf y16 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c xd y17 w5 h10"><div class="t m0 x1a h5 y18 ff1 fs2 fc0 sc0 ls0 ws0">评卷签名<span class="ff9"> </span></div></div><div class="c xf y17 w6 h10"><div class="t m0 x1b hf y18 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x10 y17 w7 h10"><div class="t m0 x1b hf y18 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x11 y17 w7 h10"><div class="t m0 x1b hf y18 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x12 y17 w8 h10"><div class="t m0 x1b hf y18 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x13 y17 w7 h10"><div class="t m0 x1b hf y18 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x14 y17 w7 h10"><div class="t m0 x1b hf y18 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x15 y17 w6 h10"><div class="t m0 x1b hf y18 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x16 y17 w9 h10"><div class="t m0 x1b hf y18 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x17 y17 w7 h10"><div class="t m0 x1b hf y18 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x18 y17 w7 h10"><div class="t m0 x1b hf y18 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c x19 y17 wa h10"><div class="t m0 x1c hf y18 ff9 fs5 fc0 sc0 ls0 ws0"> </div></div><div class="c xd y19 w5 h11"><div class="t m0 x1a h5 y1a ff1 fs2 fc0 sc0 ls0 ws0">复核得分<span class="ff9"> </span></div></div><div class="c xf y19 w6 h11"><div class="t m0 x1b h5 y1a ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x10 y19 w7 h11"><div class="t m0 x1b h5 y1a ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x11 y19 w7 h11"><div class="t m0 x1b h5 y1a ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x12 y19 w8 h11"><div class="t m0 x1b h5 y1a ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x13 y19 w7 h11"><div class="t m0 x1b h5 y1a ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x14 y19 w7 h11"><div class="t m0 x1b h5 y1a ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x15 y19 w6 h11"><div class="t m0 x1b h5 y1a ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x16 y19 w9 h11"><div class="t m0 x1b h5 y1a ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x17 y19 w7 h11"><div class="t m0 x1b h5 y1a ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x18 y19 w7 h11"><div class="t m0 x1b h5 y1a ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x19 y19 wa h11"><div class="t m0 x1c h5 y1a ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c xd y1b w5 h12"><div class="t m0 x1a h5 y1c ff1 fs2 fc0 sc0 ls0 ws0">复核签名<span class="ff9"> </span></div></div><div class="c xf y1b w6 h12"><div class="t m0 x1b h5 y1c ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x10 y1b w7 h12"><div class="t m0 x1b h5 y1c ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x11 y1b w7 h12"><div class="t m0 x1b h5 y1c ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x12 y1b w8 h12"><div class="t m0 x1b h5 y1c ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x13 y1b w7 h12"><div class="t m0 x1b h5 y1c ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x14 y1b w7 h12"><div class="t m0 x1b h5 y1c ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x15 y1b w6 h12"><div class="t m0 x1b h5 y1c ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x16 y1b w9 h12"><div class="t m0 x1b h5 y1c ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x17 y1b w7 h12"><div class="t m0 x1b h5 y1c ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x18 y1b w7 h12"><div class="t m0 x1b h5 y1c ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x19 y1b wa h12"><div class="t m0 x1c h5 y1c ff9 fs2 fc0 sc0 ls0 ws0"> </div></div><div class="c x8 yd w4 h9"><div class="t m0 xb h6 y1d ff3 fs2 fc0 sc0 ls0 ws0"> </div><div class="t m0 xb h6 y1e ff1 fs2 fc0 sc0 ls0 ws0">一、基本概念与<span class="_ _1"></span>原理题（<span class="ff2">6<span class="_"> </span></span>小题，共<span class="_ _4"> </span><span class="ff2">60<span class="_"> </span></span>分）<span class="ff3"> </span></div><div class="t m0 x1d h6 y1f ff3 fs2 fc0 sc0 ls0 ws0">1<span class="ff1">、<span class="ffa"> <span class="_ _5"></span><span class="ff1">简述在频域里的<span class="_ _1"></span>两种传感器信号选择<span class="_ _1"></span>方式。<span class="ff3"> </span></span></span></span></div><div class="t m0 x1d h5 y20 ff9 fs2 fc0 sc0 ls0 ws0">2<span class="ff1">、<span class="_ _5"></span>按测量<span class="_ _1"></span>手段，<span class="_ _5"></span>下面两图<span class="_ _1"></span>分别属于哪种测量方<span class="_ _1"></span>式<span class="_ _5"></span>（偏位式测量、<span class="_ _6"></span>零位式测量<span class="_ _1"></span>、<span class="_ _5"></span>微差式测</span></div><div class="t m0 xb h5 y21 ff1 fs2 fc0 sc0 ls0 ws0">量）<span class="_ _7"></span>，并叙述理<span class="_ _1"></span>由。<span class="ff9"> </span></div><div class="t m0 xb h5 y22 ff2 fs2 fc0 sc0 ls0 ws0"> <span class="_ _8"> </span><span class="ff9"> </span></div><div class="t m0 xb h13 y23 ff2 fs2 fc0 sc0 ls3 ws0"> <span class="fs0 ls4"> </span><span class="ls0">1<span class="ff1">—<span class="_ _1"></span>液面<span class="ff2 ls5"> <span class="_ _3"></span><span class="ls0">2</span></span>—<span class="ls6">直管<span class="ff2 ls3"> <span class="ls0">3</span></span></span>—空<span class="_ _1"></span>气超声探头<span class="ff2 ls3"> <span class="ls0">4</span></span>—反射<span class="_ _1"></span>小板<span class="ff2 ls3"> <span class="ls0">5</span></span>—电子开关<span class="_ _1"></span><span class="ff2"> <span class="_"> </span><span class="ffb"> </span></span></span></span></div><div class="t m0 x1e h6 y24 ff1 fs2 fc0 sc0 ls0 ws0">（<span class="ff3">a</span>）超声波液位<span class="_ _1"></span>计<span class="ff2"> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span><span class="ff3"> </span></span></div><div class="t m0 x1f h6 y25 ff3 fs2 fc0 sc0 ls0 ws0"> </div><div class="t m0 x1e h6 y26 ff1 fs2 fc0 sc0 ls0 ws0">（<span class="ff2">b</span>）变压器差<span class="_ _1"></span>动整流电路<span class="ff3"> </span></div><div class="t m0 xb h6 y27 ff3 fs2 fc0 sc0 ls0 ws0"><span class="fc2 sc0"> </span></div></div><div class="c x20 y28 wb h14"><div class="t m0 xb h15 y29 ff1 fs7 fc0 sc1 ls2 ws0">试卷<span class="ls0">编号：<span class="ffc sc0"> </span></span></div></div></div><div class="pi" data-data='{"ctm":[1.611792,0.000000,0.000000,1.611792,0.000000,0.000000]}'></div></div><div id="pf2" class="pf w0 h0" data-page-no="2"><div class="pc pc2 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="/image.php?url=https://csdnimg.cn/release/download_crawler_static/89500839/bg2.jpg"><div class="c x0 y1 w2 h0"><div class="t m0 x1 h2 y2 ff1 fs0 fc0 sc0 ls0 ws0">广东工业大学试卷用纸，第<span class="ff2">2</span>页，共<span class="ff2">6</span>页<span class="ff3"> </span></div></div><div class="c x21 y2a wc h16"><div class="t m0 x22 h5 y2b ff9 fs2 fc0 sc0 ls0 ws0">3<span class="ff1">、<span class="_ _9"></span>镍铬—镍硅热<span class="_ _1"></span>电偶，<span class="_ _9"></span>工作时冷端温度<span class="_ _1"></span>为<span class="_ _a"> </span><span class="ff9">30</span>℃，<span class="_ _9"></span>测得热电<span class="_ _1"></span>动势<span class="_ _a"> </span><span class="ff9">E(t<span class="_ _1"></span>,t</span></span></div><div class="t m0 x23 h17 y2c ff9 fs8 fc0 sc0 ls0 ws0">0</div><div class="t m0 x24 h5 y2b ff9 fs2 fc0 sc0 ls0 ws0">)=38.56<span class="_ _1"></span>0mv<span class="ff1">，<span class="_ _9"></span>利用线性插值</span></div><div class="t m0 x25 h5 y2d ff1 fs2 fc0 sc0 ls0 ws0">方法近似计算被<span class="_ _1"></span>测介质实际温度。<span class="ff9">(E<span class="_ _1"></span>(30,0)=1.203m<span class="_ _1"></span>v) </span></div></div><div class="c x26 y2e wd h18"><div class="t m0 x27 h19 y2f ffd fs0 fc0 sc0 ls0 ws0">工作端<span class="ffe"> </span></div><div class="t m0 x27 h19 y30 ffd fs0 fc0 sc0 ls0 ws0">温度<span class="ffe">(</span>℃<span class="ffe">) </span></div></div><div class="c x28 y31 we h1a"><div class="t m0 x2 h19 y32 ffe fs0 fc0 sc0 ls7 ws0">900<span class="ls0"> </span></div></div><div class="c x29 y31 wf h1a"><div class="t m0 x2 h19 y32 ffe fs0 fc0 sc0 ls7 ws0">920<span class="ls0"> </span></div></div><div class="c x2a y31 we h1a"><div class="t m0 x2 h19 y32 ffe fs0 fc0 sc0 ls7 ws0">940<span class="ls0"> </span></div></div><div class="c x2b y31 w10 h1a"><div class="t m0 x2 h19 y32 ffe fs0 fc0 sc0 ls7 ws0">960<span class="ls0"> </span></div></div><div class="c x2c y31 wf h1a"><div class="t m0 x2 h19 y32 ffe fs0 fc0 sc0 ls7 ws0">970<span class="ls0"> </span></div></div><div class="c x2d y31 w11 h1a"><div class="t m0 x2 h19 y32 ffe fs0 fc0 sc0 ls7 ws0">980<span class="ls0"> </span></div></div><div class="c x2e y31 w12 h1a"><div class="t m0 x2 h19 y32 ffe fs0 fc0 sc0 ls7 ws0">990<span class="ls0"> </span></div></div><div class="c x28 y2e w13 h1b"><div class="t m0 x2f h19 y33 ffd fs0 fc0 sc0 ls0 ws0">热电动势<span class="ffe"> (mv) </span></div></div><div class="c x26 y34 wd h1c"><div class="t m0 x30 h19 y35 ffe fs0 fc0 sc0 ls0 ws0"> </div></div><div class="c x28 y34 we h1c"><div class="t m0 x1c h19 y35 ffe fs0 fc0 sc0 ls0 ws0">37.325 </div></div><div class="c x29 y34 wf h1c"><div class="t m0 x1c h19 y35 ffe fs0 fc0 sc0 ls0 ws0">38.122 </div></div><div class="c x2a y34 we h1c"><div class="t m0 x1c h19 y35 ffe fs0 fc0 sc0 ls0 ws0">38.915 </div></div><div class="c x2b y34 w10 h1c"><div class="t m0 x1c h19 y35 ffe fs0 fc0 sc0 ls0 ws0">39.703 </div></div><div class="c x2c y34 wf h1c"><div class="t m0 x1c h19 y35 ffe fs0 fc0 sc0 ls0 ws0">40.096 </div></div><div class="c x2d y34 w11 h1c"><div class="t m0 x1c h19 y35 ffe fs0 fc0 sc0 ls0 ws0">40.488 </div></div><div class="c x2e y34 w12 h1c"><div class="t m0 x1c h19 y35 ffe fs0 fc0 sc0 ls0 ws0">40.897 </div></div><div class="c x21 y2a wc h16"><div class="t m0 x22 h5 y36 ff2 fs2 fc0 sc0 ls0 ws0">4<span class="ff1">、<span class="_ _5"></span>如图为一直流应变<span class="_ _1"></span>电桥，<span class="_ _1"></span><span class="ff9">E <span class="_ _9"></span>= <span class="_ _6"></span>6V<span class="ff1">，<span class="_ _5"></span><span class="ff9">R1=R2=R3=<span class="_ _1"></span>R4=<span class="ls6">20</span><span class="ff1">0Ω，<span class="_ _1"></span>求：<span class="_ _b"></span>（<span class="ff9">1</span>）<span class="_ _5"></span><span class="ff9">R1<span class="_ _4"> </span><span class="ff1">为应变片其余为外接电阻<span class="_ _1"></span>，</span></span></span></span></span></span></span></div><div class="t m0 x25 h5 y37 ff9 fs2 fc0 sc0 ls0 ws0">R1<span class="_ _a"> </span><span class="ff1">增<span class="_ _1"></span>量为△<span class="ff9">R1=2</span>Ω<span class="_ _4"> </span>时，用近似公式计<span class="_ _1"></span>算的输出<span class="ls6">电压<span class="_ _a"> </span></span><span class="ff9">Uo=?</span>（<span class="_ _1"></span><span class="ff9">2<span class="ff1">）近似计算所引<span class="_ _1"></span>起的测量误差是多<span class="_ _1"></span>少？<span class="ff9"> </span></span></span></span></div><div class="t m0 x31 h1d y38 ff3 fs9 fc0 sc0 ls0 ws0"> </div><div class="t m0 x22 h5 y39 ff2 fs2 fc0 sc0 ls0 ws0">5<span class="ff1">、<span class="_ _6"></span>下图是超声<span class="_ _1"></span>波汽车倒车防碰撞<span class="_ _1"></span>装置的示意图，<span class="_ _6"></span>请<span class="_ _1"></span>分析该装置的工作原<span class="_ _1"></span>理，<span class="_ _6"></span>并说明与防汽车<span class="_ _1"></span>追尾</span></div><div class="t m0 x25 h6 y3a ff1 fs2 fc0 sc0 ls0 ws0">雷达的本质区别<span class="_ _1"></span>。<span class="ff3"> </span></div><div class="t m0 x22 h6 y3b ff2 fs2 fc0 sc0 ls0 ws0"> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_ _4"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_ _c"> </span><span class="ff3"> </span></div><div class="t m0 x22 h6 y3c ff9 fs2 fc0 sc0 ls0 ws0">6<span class="ff1">、二极管双<span class="_ _4"> </span><span class="ff2">T<span class="_"> </span></span>形交流电<span class="_ _1"></span>桥电路，请分析工作原<span class="_ _1"></span>理。<span class="ff3"> </span></span></div><div class="t m0 x25 h5 y3d ff2 fs2 fc0 sc0 ls0 ws0"> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_"> </span> <span class="_ _d"> </span><span class="ff9"> </span></div><div class="t m0 x25 h6 y3e ff3 fs2 fc0 sc0 ls0 ws0"> </div><div class="t m0 x22 h5 y3f ff1 fs2 fc0 sc0 ls0 ws0">二、方案设计题<span class="_ _1"></span>（<span class="ff9">3<span class="_ _a"> </span></span>小题<span class="_ _1"></span>，每小题<span class="_ _a"> </span><span class="ff9 ls6">10<span class="_ _a"> </span></span>分，共<span class="_ _4"> </span><span class="ff9">30<span class="_ _a"> </span></span><span class="ls6">分）</span><span class="ff9"> </span></div><div class="t m0 x22 h5 y40 ff9 fs2 fc0 sc0 ls0 ws0">1<span class="ff1">、基本设计题<span class="_ _1"></span>。某一火力发电厂<span class="_ _1"></span>发现，运输到该电<span class="_ _1"></span>厂的煤炭中混杂有未<span class="_ _1"></span>爆炸的雷管和其他金<span class="_ _1"></span>属。</span></div><div class="t m0 x25 h5 y41 ff1 fs2 fc0 sc0 ls0 ws0">现打算在磨煤机传送带的适当位置，安装若干个传感器，当检测到雷管和其<span class="_ _1"></span>他金属时报警，并快速将</div><div class="t m0 x25 h5 y42 ff1 fs2 fc0 sc0 ls0 ws0">该段传送带上的煤块自动推下传送带。请按上述要求，设计一台雷管检测装<span class="_ _1"></span>置。具体要求：<span class="_ _7"></span>（<span class="ff9">1</span>）选用</div><div class="t m0 x25 h5 y43 ff1 fs2 fc0 sc0 ls0 ws0">什么传感元件？<span class="_ _1"></span>（<span class="ff9">2</span>）画出测量转<span class="_ _1"></span>换电路的原理框图<span class="_ _1"></span>。<span class="_ _7"></span>（<span class="ff9">3</span>）简要说明<span class="_ _1"></span>工作原理。<span class="ff9"> </span></div><div class="t m0 x22 h5 y44 ff9 fs2 fc0 sc0 ls0 ws0">2<span class="ff1">、<span class="_ _6"></span>灵活设计题。<span class="_ _9"></span>设计三种不同传感原<span class="_ _1"></span>理的温度测量传感器<span class="_ _1"></span>，<span class="_ _6"></span>并画出相应的测<span class="_ _1"></span>量转换电路或测量<span class="_ _1"></span>转</span></div><div class="t m0 x25 h5 y45 ff1 fs2 fc0 sc0 ls0 ws0">换电路框图。<span class="_ _1"></span><span class="ff9"> </span></div></div></div><div class="pi" data-data='{"ctm":[1.611792,0.000000,0.000000,1.611792,0.000000,0.000000]}'></div></div>

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