Development and Design of Remote Monitoring System for Inland Navigation Mark ①

[Abstract] Based on the present situation of navigation mark business management in inland river, a set of navigation mark telemetry management platform based on computer technology and wireless communication transmission technology was developed, which successfully solved the field collection and transmission of navigation mark technical parameters, realized real-time monitoring of controlled navigation marks, and provided some reference for the management, maintenance and related system development of inland river navigation marks in the future.

[Keywords:] computer navigation mark telemetry

【 China Library Classification Number 】 F2 【 Document Identification Number 】 A 【 Document Number 】1007-9416 (2010) 03-0029-02

1 Introduction

Huzhou is located in the north of Zhejiang Province, on the west side of Hangjiahu Plain, bordering Taihu Lake in the north, Anhui Province in the west, Jiangsu in the east and Hangzhou in the south. It is an important transportation hub connecting Jiangsu, Zhejiang, Anhui and Shanghai. Huzhou is located in the western hilly and semi-mountainous areas, with rich nonmetallic mineral resources, eastern plains, vertical and horizontal waterways and dense ports. Excellent water transport conditions and developed waterway network.

Huzhou Navigation Area has 1 16 class navigation channels with a total mileage of 163 km, and there are 5 10 signs, including 69 luminous signs. For a long time, in the maintenance and management of navigation marks, the traditional patrol mode of navigation mark ships has been used for daily maintenance. However, the navigation mark lines in the jurisdiction are long and there are many points, and the farthest navigation mark is about 50 kilometers away from the navigation mark management department. Using traditional methods to maintain navigation AIDS is not only costly and labor-intensive, but also can't find the abnormality of navigation AIDS in time. In addition, the full-time navigation mark maintenance personnel are limited, and the maintenance power is obviously insufficient. In view of this situation, it is necessary to carry out technical innovation and development, explore and design a remote monitoring system for navigation AIDS, improve the efficiency of navigation AIDS inspection, reduce the labor intensity of staff, reduce daily maintenance costs, and ensure the normal and effective lighting of navigation AIDS.

2 system design

2. 1 design overview

The traditional data acquisition system consists of single chip microcomputer and PC serial port. Most of these systems adopt RS232, RS485 or wired Modem communication mode. Although economical and practical, its wired data transmission mode greatly limits the expansion of application environment.

After years of development, the current mobile communication service technology is quite mature. Using the existing GSM network resources, giving full play to the advantages of high network coverage and good transmission characteristics, and providing convenient wireless data transmission mode for the existing data acquisition system has become a new development trend in the field of industrial control and field monitoring. The system mainly combines the mobile communication network and the company LAN, successfully solves the field collection and transmission of technical parameters of navigation marks, and realizes real-time monitoring of controlled navigation marks by controlling and understanding the operation of navigation marks through SMS.

2.2 system architecture

The system is mainly composed of three parts, namely, the front-end data acquisition system of navigation AIDS, the communication system and the background monitoring and management system. The structure is shown in figure 1.

2.3 Communication design

The system communication design mainly includes the following contents:

(1) The main control computer is connected with an external GSM-Modem through a serial port, reads short messages received by GSM, obtains field measurement data, and can directly send instructions to request remote equipment to send data. (2) When a fault occurs, an alarm signal can be sent to the mobile phone of the navigation mark manager through GSM-Modem. (3) The field signals are converted into data signals after being collected by the collector, and sent to the GSM-Modem on the spot, and then sent to the main control computer through the GSM network. (4) The sending time interval can be set regularly by the navigation mark manager, or the data can be received directly. (5) Navigation AIDS managers can also send instructions directly to the remote GSM-Modem through the mobile phone, and the remote equipment will send the field data to the mobile phone after receiving the instructions.

2.4 Measurement and control objects

The measurement and control objects of the system are navigation lights and related auxiliary facilities, mainly the following equipment.

(1) main light: green light, 175W, AC 1 10V power supply, no bubble changer and flasher, AC220V daylight switch. (2) Auxiliary lamp: white light, flashing for 8 seconds, flashing for 4 times, DC 12 V 20 W, powered by two 6V/50AH batteries. (3) Charging: AC220V is converted into DC to charge the battery.

2.5 Measuring and control equipment

(1) main measurement and control station: computer 1 set, printer 1 set, communication control box 1 set. (2) Communication control box: A Siemens TC-35 GSM-MODEM is set in the communication control box. (3) Measurement and control equipment box: A set of electric quantity transmitter, a set of LP3500 FOX low-power RTU produced by Z-WORLD company and related devices are set in the measurement and control equipment box.

2.6 Software design requirements of measurement and control platform

(1) General requirements: the operation is simple and clear, and the interface is simple and beautiful, mainly represented by charts, supplemented by words; The system capacity is 200 substations. (2) Database requirements: The database needs to be designed with original database, fault database, operation database and historical database, in which the data information of the original database should reflect the original data of the measuring point, such as number, name, description and photos. (3) The main function of the software is to realize the query and receiving function of substation information; Alarm information is highlighted on the screen; You can query the original data of each substation, add, delete and modify data (set the operation authority of the last three items); Can query substation information (original, history, operation, etc. ) in the form of charts and tables; You can print tabular data and functions related to encryption and password control.

3 system function

Navigation mark telemetry monitoring system consists of monitoring main station and monitoring sub-station. The measurement and control master station consists of computer and communication control box, which is located in the navigation mark station. The user management platform is completed by the system, which can input and modify the basic information and technical parameters of navigation AIDS in real time, and has the functions of recording operation parameters and data storage and query, including the following basic functions: signal query, data acquisition, user management, system setting, database arrangement, data query and so on. And set up a perfect password system to ensure the security of the system. On this basis, functions can be added as needed to make the system more applicable and easy to upgrade and maintain. The TT&C substation consists of TT&C equipment box and communication equipment box. The measurement and control equipment box is responsible for completing the detection and control functions, and the communication equipment box is responsible for completing the communication functions. The measurement and control equipment box and the communication equipment box are all three watertight boxes. Its main measurement and control functions are:

(1) The monitoring center can inquire information from the monitoring substation at any time. (2) The substation sends information to the main station at regular intervals, and the interval can be set as required. (3) Once the navigational AIDS in the substation fail or fail, they can report to the main station in time. (4) The mobile phone can establish contact with the substation to obtain the working information of the substation. (5) When the main light fails, report to the main station and mobile phone.

4 technical indicators and parameters

4. 1 measurement parameters (substation)

AC power supply: current and voltage.

Main lamp: dynamic current, dynamic voltage, static current and static voltage.

Auxiliary lights: dynamic current, dynamic voltage, static current, static voltage, flash quality.

Battery: current and voltage.

Charging controller: charging voltage and charging current.

Power outage time: power outage time and recovery time.

4.2 Measurement and control technical indicators

Accuracy of flash acquisition: ≤ 1%.

AC: The accuracy of current sensor is 0.5, and that of voltage sensor is 0.2.

DC: Accuracy of current sensor ≤ 2.5%, and accuracy of voltage sensor ≤ 0.5%.

4.3 Monitoring equipment indicators

(1) Requirements for measurement and control equipment box: Vito III waterproof and airtight box. Wiring is marked and standardized. Working voltage: DC 10V ~ 15V.

Working current of the whole machine: ≤60mA. Static current of the whole machine: ≤30mA. Working temperature: -25℃ ~+55℃.

(2) Requirements for communication equipment box: Vito III waterproof and airtight box. Connections should be marked and wiring should be standardized. Working voltage: DC 10V ~ 15V.

Static current of the whole machine: when the whole machine is not working, it is in standby state. Working temperature: -25℃ ~+55℃.

5 conclusion

The successful development of the inland navigation mark telemetering supervision system, focusing on the on-site collection and transmission of technical parameters of on-site navigation mark facilities, will play a positive role in the management and maintenance of inland navigation marks, with certain technological innovation, and can realize real-time monitoring of navigation marks. After the application of this system in the inland navigation area of Huzhou, Zhejiang Province, the management and maintenance of navigation AIDS can be changed from traditional management means to scientific and automatic, and the management cost can be reduced, and the work efficiency and management level can be improved.

[References]

[1]ASP.NET Chen Wu 2.0+SQL Server 2005 Database Development and Example. Tsinghua University Publishing House, 2008.

[2] G.Andrew Duthie, Senior Vice President of Microsoft ASP.NET. World Book Publishing House, 2002.

[3] Li Hong, Li Fengjie, Yang Sen and other editors. Development and application of management information system. Electronic Industry Press, 2003, 1.

[4] Zhejiang Port and Shipping Administration. People's Republic of China (PRC) * * * Regulations and Air China Standards, 1995.

[Introduction to the author]

Feng Yuru, (1976-), female, Huzhou, Zhejiang, lecturer, undergraduate. 1999 graduated from Zhejiang university in July, majoring in applied electronic technology. His main research interests are electronic application technology and power system automation.

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