As one of the basis materials for the graduation thesis defense committee to examine students' defense qualifications, the opening report cannot be written casually. The following is the opening report of the mechanical and electrical professional paper I compiled for you, hoping to help.
Chapter 1: Opening Report
Subject name: GPRS-based remote monitoring system
1, the purpose and significance of this question.
With the development of computer technology, especially internet technology, people's lives have undergone profound changes. In the field of industrial control, it takes a lot of manpower, material resources and financial resources to maintain equipment because of the wide monitoring area and various monitoring objects. Moreover, there are many places with bad conditions, where people can't arrive or stay all the time and occasionally collect the field data of 1. It is uneconomical to do a lot of wiring work.
With the rapid development of PLC application, various advanced empty container strategies have to face the remote control application of different objects in large-span scattered places. How to realize the transmission and processing, remote control and remote maintenance of various field data in large-scale distributed applications is a very practical problem, and the premise of doing so is the remote transmission of all data packets.
In the past, some PLC application systems used wireless digital radio communication to achieve the purpose of remote control of PLC, but this scheme still has some defects, mainly because its distribution range is still limited, and its reliability is greatly affected with the increase of communication distance. At present, the latest application trend is to combine the PLC empty container system with the existing GPRS wireless communication network technology. Through GPRS network communication technology, remote and reliable data transmission can be realized in the whole country or even in the whole world, so as to achieve the purpose of remote data analysis, processing and remote control.
2. The main research content of this topic.
(1) Field control/acquisition point:
The on-site monitoring points are automatically controlled by PLC, collect relevant information and connect with GPRSDTU terminal through RS232 or RS485 interface. The equipment information collected by PLC is sent to GPRS wireless network after data processing and protocol encapsulation through GPRSDTU terminal.
(2) Monitoring Center:
A) public network access scheme
The server uses the public network to access the Internet, such as ADSL dial-up/broadband access on the special telecommunication line, and applies for a fixed IP address on the public network. Can realize the system application of small and medium capacity.
B) private network access scheme
The server adopts DDN special line provided by provincial mobile communication company, and applies for a fixed IP address to connect to GPRS network. Because the DDN dedicated line can provide higher bandwidth, when the number of field PLCs increases, the center can meet the demand without capacity expansion, and can realize the application of large-capacity systems. The RADIUS server of the monitoring center receives the data from the GPRS network, then carries out AAA authentication, and then transmits it to the computer host of the monitoring center. In step 1, the numerical control is restored and displayed by the system software, and the data is processed, thus enhancing the security performance of the system data communication.
(3)GPRS mobile data transmission network:
At the same time, the data collected by PLC is decoded by the air interface function module of GPRS network, converted into the format of public network data transmission, transmitted through GPRS wireless data network of China Mobile, and finally transmitted to the IP address of the monitoring center.
3. Schedule
Xx years, xx months, xx years ago, graduation design topic;
On xx, xx, xx, students submit graduation project opening report;
Starting from xx, xx, xx, graduates will have off-campus internships; During the period, report the graduation project and off-campus internship to the instructor and counselor once every two weeks;
On xx, xx, xx, the graduates will submit the first draft of graduation design to the tutor for review;
On xx, xx, xx, the graduates will submit the second draft of graduation design to the tutor for review.
On xx, xx, xx, the graduates returned to school and brought back the graduation internship agreement, internship appraisal (sealed by the internship unit) and internship summary report to guide the teachers to review the papers.
Graduation defense on xx, xx, xx.
4. Reference materials
[1] edited by Zheng Jiali Huang Wei. Single chip microcomputer and embedded system application. Beijing: China Light Industry Press, 2006.
[2] edited by Hu. Principle and application of SP430 series ultra-low power consumption 16-bit single chip microcomputer Beijing: Beijing University of Aeronautics and Astronautics Press, 2000.
[3] Li Hua and Li Xueyun. GPRS system, a new mobile communication technology. Guangzhou: South China University of Technology Press, 200 1
[4] edited by Zhang Lei. GPRS series manuals. Shanghai, 2006
[5] Shen Jianhua, Yang Yanqin and Zhai Xiaoshu. Principle and application of MSP430 series 16-bit ultra-low power single chip microcomputer. Beijing: 2006
[6] Mei, Wang, Zhang Jun, editor-in-chief. Principle and Interface Technology of Single Chip Microcomputer. Beijing: Beijing Tsinghua University Publishing House, 2006.
[7] edited by Zhao. Research on GPRS technology realization and service application. Beijing: Institute of Telecommunication Transmission, Ministry of Information Industry, 2006.
[8] Cai Yuedan, Xu, Gan Yicheng. Design and application of GPRS wireless data transmission system [J]. Shanghai: Shanghai Jiaotong University Press, 2005.
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Chapter 2: Opening Report
Paper Name: Design of Bar Cutting Machine
1, the basis of topic selection (significance, preparation, basis, etc.). )
Electromechanical integration products are widely used in various processing industries, and cutting technology is also developing rapidly. Manual cutting can no longer meet the requirements of modern industrial development. Now it has entered the era of general machinery. For decades, the research and development of cutting technology has been very active, the design has been constantly revised, the variety has been increasing, and the application field has been expanding. At present, there are many types of bar cutting machines on the market, which are complicated in structure, inconvenient in adjustment and maintenance, low in production efficiency and low in intelligence.
2. Content summary (objectives, main contents, key problems to be solved, etc.). )
1. For the cutting process of the shearing machine, such as: feeding-pressing-cutting-adjusting-re-cutting-cutting-plate laying, PLC is used for semi-automatic control. Minimize the requirements for the number of operators, so that operators don't have to stay by the machine all the time. The main research here is the control process and programming of PLC.
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