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1、Manipulator is now used as a industrial robots in use, the control objectives often appear often in industrial automation. Industrial automation technology has gradually matured, as mature a technology line has been rapid development in industrial automation as a separate subject. Manipulator applic
2、ation began to filter into welding, logistics, mechanical processing, and other industries. Especially at high or very low temperatures, full of poisonous gases, high radiation case, robot in similar circumstances showed great use also brings great convenience to the staff. Precisely because of this
3、 robot to get peoples attention began to be a high degree of development. Labor rates, working conditions, labor intensive aspects of promoting development. Both at home and abroad to develop the PLC (programmable logic controller) is in various special circumstances and under special conditions set
4、 for mechanical devices. Now turned on the development of the microelectronics automatic control technology and the rapid development of the trains, the success of PLC hardware software and simulation control win big and successful development, now continues to develop as a factory automation standa
5、rds. Because robots are good development of the technology makes a good optimization of productive capital, and robot shows this unique advantages, such as: has good compatibility, wide availability, hardware is complete, and programming that can be mastered in a short time, so in the context of ind
6、ustrial PLC applications became ubiquitous. Manipulator in many developed country agriculture and industry has been applied, such as the use of mechanical harvesting large areas of farmland, repeated operations on the high-speed line that uses a robotic arm, and so on. Today, the high level of autom
7、ation combined with restrictions on the manipulator development level is slightly lower than the international. The design is mainly arm welding machine by PLC Automation control. This of design let designers on in school by learn of has a must of consolidation, understand has some usually didnt opp
8、ortunities awareness in world range within some leading level of knowledge has has must awareness, hope designers can in yihou of design in the can success of using in this design in the proceeds of experience 1.2 manipulator in both at home and abroad of research profile automation mechanical arm r
9、esearch began Yu 20th century medium-term, after years with with computer and automation technology of development, Makes mechanical arm on the Grand stage of industrial automation and shine, gradually became an industrial evaluation standards, and its importance can be seen. Now original robotic ar
10、m spent most of mass production and use on the production line, which is programmed robotic arm. As the first generation of manipulator position control systems main features, although not back several generations that can detect the external environment, but can still successfully complete like wel
11、ding, painting, delivery as well as for materials simple movements. Second generation mechanical arms are equipped with sensors and manipulators have the environment there is a certain amount of sense, when the mechanical arm is to use the program as a basis. Difference is that the robot begandUnit
12、1 How tall are you ? 第一课时温馨寄语：One is never too old to learn. 活到老学到老。学习内容：Lets start A. Lets learn Lets play学习目标：1、听、说、读、写形容词的比较级形式：taller stronger older younger 和 shorter2、能够使用句型 “Imcm tall. He/She iscm tall”来描述自己和他人的身高。3、能够用句型 “Youre taller than your brother. Im older than you”进行年龄和身高的比较。4、能够用形容词的比
13、较级来谈论自己、朋友、及他人或事物。学习重难点：1、重点：能够听、说、读、写形容词的比较级形式并会在实际情景中运用。2、难点：能够用长度或重量单位对人、物及动物进行描述。长度单位cm的完整形式，centimeter的发音也是本课时的教学难点。知识链接：1、本单元学习的是形容词性的比较级，在运用比较级的句型里，经常用到than，在和别人比较身高、体重等时，要用到tallerstrongerolderyoungershorter，体貌比较可以用公式表示：A+amisare+tallershorterolderyouner+than+B Be动词 形容词比较级 “与相比较”2、160 cm 的读法o
14、ne hundred and sixty-four centimeters.如果超过了1厘米，要读复数形式的发音。 学法指导： 自学（以旧引新）、小组合作、老师指导导学过程：一、自主学习：1、写出下列形容词的比较级，听录音学会单词发音。tall-_ strong-_ old-_ young-_ short-_2、写出下列比较级的反义词。taller-_younger-_shorter-_older-_3、试着翻译下列句子，并跟录音机自读。Youre taller than your brother!_Im 160 cm tall._二、合作探究：1、学习五个单词，听录音，跟随老师学会发音，并在
15、小组内学会朗读，并试记拼写。2、听录音和老师朗读，会说两个句子，并在小组之间用比较级练习说句型并在班上进行展示。Im _ cm tall .Youre _than _.三、拓展延伸：Lets play : 运用本课知识比身高、年龄，在游戏中要求用英语互相询问其他人的身高或年龄。游戏时每组可由5-8名成员组成，由一名成员发指令，其他人成员通过按指令排成一排。排得又对又快者为赢家。句型有：Line up from shorter to taller!Im taller than you .Line up from younger to older ! Im older than you .四、课堂小结：本节课，我们学习了形容词性的比较级，你会运用它来说句子吗？五、家庭作业：1、调查你的好朋友及家人的具体身高。2、读背今天所学习的五个新单词和句型。六、当堂检测：1、写出下列形容词的比较级。 tall-_ strong-_ old-_ young-_ short-_2、读表格，完成句子。教师出示一张表格，请学生根据表格的内容来完成下面的任务。NameAgeHeightKate15
