I. User requirements and system overview
1.1 user needs
Our county is located in the hilly mountains of eastern Zhejiang. Due to the influence of topography, geology, and climate, floods, landslides, and landslides are characterized by continuous heavy rain, coupled with severe vegetation damage and steep mountain slopes, it is easy to produce floods, landslides, and landslides. And other disasters. And has a wide range of points, sudden, strong and harmful. A total of 78 geological disaster hidden danger points have been found throughout the county, and 2 were added last year. Therefore, it is necessary to strengthen 80 hidden danger points.
Effectively defend against flash floods, improve disaster prevention and emergency command capabilities, minimize human casualties and property losses, and avoid mass deaths and injuries. It is specifically decided to build a wireless disaster mitigation early warning system. Establish a flash flood disaster warning system command center in the county seat, install a flash flood disaster warning loudspeaker at each geological disaster hidden danger point, and set up LED flash flood disaster warning information display screens at its five emergency command locations.
1.2 System Overview
Beijing Hiteway Technology Co., Ltd. is the first in China to design, develop and launch a flash flood warning system based on a wireless mobile network covering the whole country. This system adopts the international advanced Internet, cellular network bandwidth transmission, UTP / Gn access, embedded text-to-speech conversion, LED display control and other technologies. The system is designed to integrate "wireless text-to-speech emergency broadcasting" and "wireless LED display screen release." "A flash flood disaster warning system. It can quickly, timely and accurately disseminate all kinds of information, especially the meteorological disaster warning information to the public, expand the coverage of meteorological information, solve the problem of the "last mile" of early warning information, improve the early warning capability of flash floods, and achieve maximum disaster prevention and reduction the goal of. Now the system has been widely used in Hainan, Hubei, Shanxi, Heilongjiang, Inner Mongolia and other places.
Functional characteristics of flash flood disaster early warning system
2.1 Flash flood disaster early warning system functions
Text-to-speech conversion: Support text-to-speech broadcast output of flash flood warning information.
LED display: Support text-to-LED display of flash flood warning information.
Timing broadcast: Supports timing automatic voice broadcast and LED display of flash flood disaster warning information.
Emergency broadcast: support manual sending of information, emergency automatic voice broadcast and LED display.
Broadcasting settings: support voice male / female voice selection, tone and speed can be set as required.
Display settings: Support LED display text scroll speed setting.
Times setting: support voice broadcast, LED display information times setting.
Identity authentication: Support the identity lock and authentication of the sender of the information, and illegal information will not be received and broadcast.
Status monitoring: Support real-time monitoring of the sending status, and the software has a clear prompt for the success of the information sending.
Peripheral control: support automatic control function of amplifier power.
Multi-text: Support GB2312, GBK, BIG5, UNICODE four internal code format text.
2.2 Features of flash flood disaster warning system
Wide area coverage: China Mobile has good coverage in cities and rural areas in 31 provinces across the country. Basically, flash flood warning systems can be transmitted where mobile phones can make calls.
Always online: As long as the flash flood disaster warning system is activated, the system will remain online, similar to wireless dedicated network services.
Charge by volume: Although the wireless dedicated line network service is always online, it is charged only when communication traffic is generated, and the cost is low.
High-speed transmission: Adopting cellular network bandwidth transmission, it can support the peak transmission rate of 53.6Kbps, with high transmission rate and fast transmission speed.
Real-time publishing: Publish and receive information at any time, and can display and broadcast regularly or immediately.
Unlimited expansion: It can be used anywhere in the country as long as the wireless GPRS network covers it, regardless of distance and location.
Easy installation: As long as there is a wireless mobile network, the terminal of the flash flood disaster warning system can be powered on.
Composition of flash flood warning system
3.1 Flash flood disaster warning system release platform
Establish a flash flood disaster early warning system release platform in provinces, cities, counties or towns to regularly / manually release comprehensive information on various types of meteorology, flood control, flood control, agriculture, science and technology, and affairs, and send them over the air via wireless mobile networks.
3.2 Receiving terminal of flash flood disaster early warning system
Establish a receiving terminal for a flash flood disaster warning system in a district, town, or village, and use the electronic display to scroll the LED text of the release information and convert it into voice (male voice, female voice optional). . The meteorological information will be notified in real time so that farmers can take precautions.
Note: The speed and frequency of text scrolling, and the number of voice broadcasts of the tweeter can be set at will according to the needs of the meteorological disaster warning release platform.
4. Principles of flash flood disaster early warning system
4.1 Principle of Flash Flood Warning System
Flood control service / technical information release staff can operate or use the mountain flood / meteorological disaster early warning system platform connected to the Internet network to regularly schedule information such as flood control information, weather forecast, geological disasters, science and technology, agriculture, current policies, and emergency situations. Post manually. The published information and data are grouped, encapsulated, and sent to the Internet for transmission via the TCP / IP protocol. The Gn interface of the Internet backbone network is connected to the GTP tunneling protocol of the wireless mobile communication network. The UPP / IP protocol is used as the carrier layer to send the flood disaster. The early warning system information is sent to the wireless mobile communication network.
The wireless mobile communication network has good coverage in cities and rural areas in 31 provinces across the country. Basically, there is a wireless mobile communication network where mobile phones can make calls. The information of the flash flood early warning system will be covered by packet switching transmission in the wireless mobile communication network through the wireless cellular broadband network transmission technology.
Flash flood disaster early warning system (also called wireless early warning) terminal is based on wireless mobile communication network for data and voice communication. It can realize the conversion of CDMA / GSM / GPRS data, text, short messages, direct phone dialing into analog voice signals and carry out Enlarged input can convert CDMA / GSM / GPRS data, text, and short messages into LED real-time display. The status of the received information can be reported to the flash flood disaster early warning system platform.