自我介绍

各位老师好，我是机制081班的，我的名字是***。我毕业论文的题目是“PLC在1500kg/h推杆式淬火炉中的应用”，下面我就来简单介绍一下本课题。

众所周知，国际电工委员会对PLC做了如下定义：（可编程序控制器是一种数字运算操作的电子系统，专为在工业环境下应用而设计。它采用可编程序的存储器，用来在其内部存储执行逻辑运算、顺序控制、定时、计数和算术运算等操作的指令，并通过数字式、模拟式的输入和输出控制各种类型的机械或生产过程。）让我们再来看看淬火炉的发展趋势，2012版的《中国淬火炉行业发展研究报告》称：（2007-20xx年，国内淬火炉产业正在实现稳步增长，产业规模不断提升，未来几年之内，会对淬火炉的自动化、可操作性提出更高的要求。）

那么，将PLC应用于淬火炉中有那些优势呢？

第一，系统构成灵活、扩展容易。通过数字量逻辑控制来对淬火炉的推杆进退、炉门升降、电动机正反转进行自动化控制，借此可以实现全程自动化，有助于提高生产率。模块型PLC提供多种I/O卡件或插卡，因此用户可较合理地选择和配置控制系统的I/O点数，功能扩展方便灵活，一般用于大中型控制系统，例如，淬火炉。

第二，编程简单，操作方便。采用简明的梯形图、逻辑图或语句表等编程语言，形象直观。另外，可在线修改程序，改变控制方案而不拆动硬件，这对于淬火炉这样的大型设备尤其适用。

第三，可编程逻辑控制器接点的响应快、速度高，每条二进制指令执行时间约100ns（纳秒，1微秒=1000纳秒），每条浮点数运行指令约3微秒，因此特别淬火炉这种适应控制要求高、相应要求快的应用需要。

以上三点促进了大型淬火炉自动化和可操作性的提升，也是本课题的特色。

在本课题中，通过对淬火炉相关参数的计算来对其硬件和软件进行设计，共有5张图纸，包括系统主电路图、PLC外部接线图、顺序功能图、和两张相关梯形图。

第二篇：毕业论文答辩自我介绍

Opening presentation:

Good morning, all appraiser committee members. I am XXX.First and foremost, I would like to express my sincere gratitude to my supervisor, professor XXX for his intellectual guidance, invaluable instructions and comments on my thesis. It is with his valuable assistance that I have finally accomplished this thesis. Now, it is the show time. I will present my efforts to you and welcome any correction.

The title of my paper is Nobility and Pragmatism in British Food Culture. I choose this as my topic due to the following reasons.

In British national Character, there are two distinctive aspects: nobility and pragmatism. Britain has a long food and drink culture. In the long development, British food and drink forms its own system and become an important part in the world. The character of nobility and pragmatism show themselves in many British foods and drink. The afternoon tea is the representative of showing nobility. Pragmatism mainly embodies in the pursuing of nutrient in food material, the simple cooking method and the idea of eating of British.

British’s nobility and pragmatism which reveal in British food and drink is significant. They give other countries’ people who have not been to Britain a good impression. Foreigners realize British’s nobility and pragmatism through

Britain’s food and drink and get a good impression about Britain. That good impression contributes to improvement of Britain’s national status.

Next, it is an outline of my paper. In the main part of this paper, I divide it into six parts.

The first part will give a brief introduction of the Nobility and Pragmatism in British National Character.

And the second part is going to analyze Nobility in the Origination and Development of Afternoon Tea and Nobility in the Etiquette of Afternoon Tea In the third part, we will focus on the Pragmatism in British Food Materials and Cooking Methods as well as in Food Conception

And the fourth part is to talk about The Significance of Nobility and Pragmatism in British Food and Drink

Then the author sums up the whole paper to reveal British’s nobility and pragmatism is not acquitting themselves well in all aspect of social life, but also show themselves in the British food culture in the last part.

OK! That is all. Thank you!