Graduation design opening report template
Subject name: GPRS-based remote monitoring system
Student name: Wu xx
Professional Name: Machinery and Automation
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 not economical 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
65438, xx, before February 30, graduation project topic selection;
On June 7th, 65438 10, xx students submitted the graduation project opening report;
On March 5, xx, graduates began to practice outside the school; In the meantime, I will give guidance every two weeks.
Teachers and counselors report graduation projects and off-campus internships respectively;
On April 6th, xx, graduates will submit the first draft of graduation design to their tutors for review.
On June 4th, xx, the graduates returned to school and brought back the graduation internship agreement and internship appraisal.
(seal of internship unit) and internship summary report to guide teachers to review papers.
Graduation defense on June 23rd and 24th, xx.
4. Reference materials
[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, 20 17
[6] Mei, Wang, Zhang Jun, editor-in-chief. Principle and Interface Technology of Single Chip Microcomputer. Beijing: Beijing Tsinghua University Publishing House, 20 17.
[7] edited by Zhao. Research on GPRS technology realization and service application. Beijing: Institute of Telecommunication Transmission, Ministry of Information Industry, 20 17.
[8] Cai Yuedan, Xu, Gan Yicheng. Design and application of GPRS wireless data transmission system [J]. Shanghai: Shanghai Jiaotong University Press, 20 17.
Tutor's opinion:
Tutor's signature: XX, XX, XX, XX.
Examination and approval opinions of teaching and research section:
Signature of Director of Teaching and Research Section: XX, XX, XXXX
Department graduation design (thesis) work steering committee for examination and approval opinions: