传感器测试技术机械制造动化专业学生必修门技术基础课课程教学容包括:测试系统基概念传感器般特性分析方法传感器工作原理特性应传感器机电系统中应等四部分通课程学学生掌握测试系统设计分析方法够根工程需选合适传感器够测试系统性进行分析测数进行处理
课程基教学基求
1.解测试系统基概念系统组成传感器定义分类
2.掌握传感器静特性动特性性指标概念定义分析处理方法解提高传感器性方法
3.解常传感器工作原理掌握常传感器性特点应
4.掌握机电系统中选传感器原根需选合适传感器
课程章基容学求重点容课程教学纲教材章节前学重点教学求中已明确指出复提基础进步说明:
第章绪
解测试基概念系统结构组成掌握传感器定义理解传感器分类方法求解测试应发展
第二章传感器般特性
掌握传感器静特性性指标定义传感器失真检测条件理解传感器静态模型动态模型建立分析方法解提高传感器性方法非线性校正方法
第三章电阻式传感器
理解电阻应变式压阻式传感器电位计工作原理掌握性特点解常结构形式应
第四章电容式传感器
理解种形式电容传感器工作原理掌握性特点解应
第五章电感式传感器
理解感式差动变压器式涡流传感器工作原理掌握性特点解应解压磁式传感器感应步器
第六章磁电式传感器
理解磁电感应式传感器霍尔元件工作原理转换电路掌握性性点解应解磁栅式传感器
第七章压电式传感器
解压电式传感器工作原理掌握常压材料性特点理解转换电路
第八章光电式
解光电器件原理应光纤传感器CCDPSD光栅激光传感器原理特点应掌握光码盘工作原理应光电器件典型应
第九章超声波传感器
理解超声波传感器工作原理解性特点应
第十章传感器测试技术机电系统中典型应实例
解传感器测试技术机电系统中典型应掌握机电系统中传感器选原
二课程考核方式说明
课程总成绩形成性考核成绩期末考试成绩两部分组成中形成性考核成绩占20期末考试成绩占80
形成性考核成绩学容(时作业课程实验)学情况两部分成绩组成
时作业布置4次记分作业次作业满分25分10分
课程安排6学时实验求5实验中选做3实验 实验1分3分未完成实验参加期末考试
学情况考核容包括辅导课课情况观IP课记录情况学笔记等7分
开放教育试点关规定作业完成少2次实验未做形成性考核成绩效参加期末考试
期末考试采闭卷考试方法根2006年中央电关考试时间改革求课程考试时间1时30分钟考试题型分值题量作相应调整考核求分解理解掌握三层次试题中部分例致:掌握层次占70左右解层次占20左右理解层次占10左右
三试题类型举例说明
试题类型:简答题选择题问答题综合题等四种类型面结合具体例题说明
第类题型简答题题5分约占20分
例.传感器:
(答案:传感器种定精确度测量转换确定应关系便精确处理应种量测量装置系统)
第二类题型选择题项选择3分约占12分左右
例1.光敏元件加定电压时光电流I光敏元件光度E间关系称
a温度特性 b光特性 c光谱特性 d伏安特性
(答案:b)
例2.检测技术中采压电型换器发射超声波利压电材料接收信号
a普勒效应 b普勒频移 c逆压电效应 d正压电效应
(答案:cd)
第三类题型问答题约4道左右题题6分左右约24分
例测定频响函数方法种
(答:确定频响函数方法标准信号输入测出输出信号求需特性输入标准信号正弦信号脉信号阶跃信号)
第四类题型综合题约三道左右题题根难度分值差约1216分约45分左右
例.请画出两种霍尔元件驱动电路简述优缺点
(答:霍尔元件采恒流驱动恒压驱动恒压驱动电路简单性较差着磁感应强度增加线性变坏仅精度求太高场合恒流驱动线性度高精度高受温度影响两种驱动方式优缺点应根工作求确定驱动方式)
方便家复根学员求半学期课程台会刊登套届考题答案需说明套题仅供家复程参考实际考试时试卷题型题目分值种题型占例会定差请注意
什样考试题型题目围绕课程教学容学懂学通课程章重点教学容根希家复程中重点放课程教学容理解掌握
预祝家圆满完成课程学通期末阶段总复进步巩固学知识利通课程期末考试
中央电工学院传感器测试技术课程组
传感器测试技术届试题选登
说明:方便学员进行复根家求刊登套届期末考试试题参考答案需说明套样题仅供学员复程参考实际考试时试卷题目题型分值种题型占例会定差请注意
(考试时间:15时)
简答题(题5分20分)
1.传感器:
2.静特性:
3.超声波波型种?根什分类?
4简述电容式传感器工作原理
二选择题(空3分27分)
1.码盘式传感器建立编码器基础够角度转换数字编码种数字式传感器码盘结构分接触式________________三种
a光电式 b磁电式 c电磁式 d感应步器
2.超声波种介质中传播界面遇种介质方垂直界面时产生声波反射折射________现象
a表面波 b兰姆波 c驻波 d波型转换
3 改变电感传感器引线电缆________
a必整仪器重新标定
b 必须整仪器重新调零
c 必须整仪器重新标定
d 必整仪器重新调零
4.应变片选择包括类型选择材料选________________等
a测量范围选择 b电源选择 c 阻值选择 d 尺寸选择
e精度选择 f结构选择
5.应变片绝缘电阻指已粘贴________应变片间电阻值
a覆盖片测试件 b引线测试件 c基片测试件 d敏感栅测试件
6.光作电子吸收光子量键合状态渡状态引起物体电阻率变化种现象称________
a磁电效应 b声光效应 c光生伏特效应 d光电导效应
7 图示结构线圈铁芯衔铁三部分组成线圈套铁芯铁芯衔铁间空气隙空气隙厚度传感器运动部分衔铁相连外部作力作传感器运动部分时衔铁会运动产生位移空气隙发生变化种结构作传感器________
a 静态测量 b 动态测量
c 静态测量动态测量
d 静态测量动态测量
三激光干涉传感器作测量长度基原理光干涉原理测量精度高分辨力高图示迈克尔逊双光束干涉系统图中S光源B分光镜M1固定反射镜M2动反射镜P观察屏处试介绍工作原理(14分)
四.画出测试系统组成框图说明组成部分作(12分)
五.粘贴试件电阻应变片环境温度变化会引起电阻相变化产生虚假应变种现象称温度效应简述产生种现象原(12分)
六.图示电容式差压传感器结构示意图转换电路图中1玻璃盘2镀金层3金属膜片介绍工作原理(15分)
传感器测试技术参考答案
简答题(题5分20分)
1.传感器:传感器种定精确度测量转换确定应关系便精确处理应种量测量装置系统
2.静特性:指传感器输入量值处稳定状态时输出输入关系输入量常量变化极慢时输出输入关系
3.超声波波型种?根什分类?
超声波波型波横波表面波(称瑞利波)兰姆波
超声场中质点振动声量传播方间关系分
4简述电容式传感器工作原理
两行极板组成电容器果考虑边缘效应电容量
式中——极板间介质介电常数
——极板遮盖面积
——极板间距离
测量变化式中参数发生变化时电容量C变化
二选择题(空3分27分)
1.ac2.d3 c4.cd
5.b6.d7 c
三激光干涉传感器作测量长度基原理光干涉原理测量精度高分辨力高图示迈克尔逊双光束干涉系统图中S光源B分光镜M1固定反射镜M2动反射镜P观察屏处试介绍工作原理(14分)
答案点:
光源S光半反半透分光镜B分成两路路固定反射镜M1反射路动反射镜M2B反射观察屏P处相遇产生干涉M2移动半光波波长时干涉条纹亮暗变化次测长度
式中x—测长度
N—干涉条纹亮暗变化次数
—真空中光波波长
n—空气折射率
四.画出测试系统组成框图说明组成部分作(12分)
答案点:
传感器作测试系统第环节测量转化熟悉种信号通常传感器测量转换成电信号信号变换部分传感器送出信号进行加工信号放滤波补偿校正模数转换数模转换等处理传感器输出信号便传输显示记录显示记录部分测信号变便理解形式供观测分析
五.粘贴试件电阻应变片环境温度变化会引起电阻相变化产生虚假应变种现象称温度效应简述产生种现象原(12分)
答案点:
①环境温度变化时敏感栅材料电阻温度系数存引起应变片电阻相变化
②环境温度变化时敏感栅材料试件材料膨胀系数应变片产生附加拉长(压缩)引起电阻相变化
六.图示电容式差压传感器结构示意图转换电路图中1玻璃盘2镀金层3金属膜片介绍工作原理(15分)
答案点:
电容式差压传感器两玻璃圆盘金属膜片组成两玻璃圆盘凹面镀金作电容传感器两固定电极夹两凹圆盘中膜片传感器动电极两边压力相等时膜片处中间位置左右固定电极间距相等转换电路输出U0=0P1>P2(P2>P1)时膜片弯右侧(左侧)Cdb<Cab(Cab>Cdb)U0输出|P1P2|成例信号
中央电工学院传感器测试技术课程组
请您删容O(∩_∩)O谢谢2015年中央电期末复考试抄全电期末考试必备抄电考试必抄请您删容O(∩_∩)O谢谢2015年中央电期末复考试抄全电期末考试必备抄电考试必抄The battle for young viewers CCTV is embracing Internet culture and working with independent producers on TV shows to woo audiences under 35 Han Bing bin reports After charming audiences with his warm smile for 14 years China Central Television host Li Jiaming recently found himself targeted by a group of young netizens unhappy with his style The complaints came after Li hosted the premiere of Rising Star on Oct 31 It is a singing competition show that originated in Israel Many young netizens found his hosting style slow and boring and mocked it as CCTV evening gala style They even initiated an online campaign to replace him The 40yearold host's reaction to the criticism was surprising During the second episode he jokingly called himself the slow Jiaming and acted much younger talking faster and louder It's like selling a product When the customers file a complaint you must change says Li In the Internet age you get feedback very quickly These young people are so cute When you're willing to change for them they will quickly like you back In order to win more young viewers CCTV is relying on programs such as Rising Star to embrace Internet culture In Rising Star a studio audience and fans watching on television vote for their favorite singers in real time using the instantmessaging app WeChat Rising Star was designed to be a live broadcast but the Chinese version isn't because of policy reasons Still WeChat votes by viewers at home are still a major factor in determining which contestants advance to the next round In the show's latest episode more than 65 million votes were cast via WeChat Now the competition among entertainment shows is very fierce Audiences have more diverse needs CCTV needs to embrace an open attitude interact with young audiences and blend with the Internet says Lyu Yitao director of CCTV's entertainment channel The producer of Rising Star Enlight Media says the program will have a phenomenal effect given CCTV's audience base nationwide But it comes with a challenge says Zhang Hang chief producer of the program and CEO of Enlight Media's TV business Unlike topranking provincial satellite channels such as Hunan TV which have a large base of young fans thanks to a series of phenomenally popular entertainment and reality shows CCTV productions are usually more conservative and serious and thus have a much older audience base If we were to run this program on Hunan we may attract twice as many viewers says Zhang But since we didn't make it there we now have to make the best out of the given conditions And it means we have to make certain compromises When the current season of Rising Star ends Zhang says his company will conduct an overall evaluation of the program and make adjustments for future seasons Although audience ratings haven't lived up to Zhang's expectations he says the program has already helped CCTV attract more young people According to Enlight Media the number of people ages 15 to 35 who watched the first episode of Rising Star was 76 percent higher than the usual audience for CCTV entertainment productions In order to attract young audiences CCTV has been working with independent production companies As one of CCTV's closest partners Enlight Media has produced several entertainment and reality shows for the company's channels including the Chinese version of The Biggest Loser on CCTV's business channel and an original teenager talent show Shaonian Zhongguo-qiang (Strong Young Chinese) on CCTV1 This year CCTV also licensed EEMedia the producer of the popular Super Girl talent shows to produce the talk show Hi 2014 hosted by Taiwan pop star Harlem Yu and one of China's most popular TV stars Xie Na The show is geared toward younger audiences Canxing Productions which rose to fame with the success of its Voice of China series on Zhejiang TV also produced two talent shows for CCTV One is an original production called Songs of China which ended up as one of CCTV's most watched programs of 2014 The State Administration of Press Publication Radio Film and Television announced earlier this year that starting in 2015 only one music talent show can be aired nationwide during prime time each season and there can be only one program based on foreign formats each year However domestic media report that such policies don't apply to CCTV meaning it will become a highly desired platform by production companies Wang Changtian CEO of Enlight Media confirmed to the Shanghai Securities News that its programs scheduled to air on CCTV next year which include at least two reality shows won't be affected A kung futhemed reality show produced by Canxing is also reportedly scheduled to run on CCTV next year CCTV is very active The level of its acceptance of new ideas is even beyond my imagination says Zhang Hang Our cooperation with CCTV will surely continue When winter comes nothing is more relaxing than a hot spring bath For thousands of years natural mineralrich hot spring baths have also been used to relieve health ailments The water found in natural hot springs contains a variety of different minerals and the most common one is sulfur It has a rotten egg smell but is excellent for skin The sulfurcontaining water might be just what the doctor ordered when it comes to relieving pain stress itchy skin arthritis and more Hot springs resorts are thriving as biting cold winter arrives Here we take a look at some of the best natural hot springs China has to offer
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