Flash flood warning

1. User requirements and system overview 1.1 User requirements Our county is located in the hilly and mountainous areas of eastern Zhejiang. Due to the influence of terrain, geology, and climate, floods, debris flows, and landslide disasters are characterized by continuous heavy rain, coupled with severe vegetation damage, high mountain slope If it is steep, it is prone to floods, debris flows, landslides and other disasters. And it has the characteristics of being multi-faceted, wide-spread, and sudden and harmful. A total of 78 geological hazards have been found in the county up to now, and two more were added last year. Therefore, the number of hidden hazards that should be particularly strengthened by mountain torrents is 80.
Effectively defend against torrential flood disasters, improve disaster prevention and emergency command capabilities, minimize human casualties and property losses, and avoid the occurrence of mass deaths and mass casualties. We decided to build a wireless disaster reduction warning system. Establish a mountain flood warning and broadcast command center in the county town, install a mountain flood disaster early warning loudspeaker at each geological hazard hidden point, and set up LED flash flood early warning information display screens at 5 emergency command points.
1.2 System Overview Beijing Haite Weiye Technology Co., Ltd. took the lead in designing, developing and launching a mountain flood warning broadcast based on a wireless mobile network covering the whole country. The system adopts international advanced INTERNET, cellular network bandwidth transmission, UTP / Gn access, embedded text-to-speech conversion, LED display control and other technologies, and is designed to release "wireless text-to-speech emergency broadcasting" and "wireless LED display". "Integrated flash flood warning and broadcasting system. It can quickly, timely and accurately disseminate all kinds of information, especially meteorological disaster warning information to the public, expand the coverage of meteorological information, solve the "last mile" problem of early warning information, improve the ability of mountain flood disaster early warning, and achieve maximum disaster prevention and mitigation the goal of. Now the system has been widely used in Hainan, Hubei, Shanxi, Heilongjiang, Inner Mongolia and other places.
2. Features of flash flood warning and broadcast function 2.1 Flash flood warning and broadcast function Text-to-speech conversion: Support text-to-speech broadcast output of flash flood warning information.
LED display: Supports flash flood warning information text to LED display.
Timed broadcast: Supports automatic voice broadcast and LED display of mountain flood disaster warning information.
Emergency broadcast: support manual sending information, emergency automatic voice broadcast and LED display.
Broadcast settings: support voice male / female voice selection, pitch and speech rate can be set as needed.
Display settings: Support LED display text scrolling speed setting.
Frequency setting: Supports voice broadcast and LED display information frequency setting.
Identity authentication: Support the identity lock and authentication of the sender of the information, illegal information will not be received and broadcast.
Status monitoring: It supports real-time monitoring of the sending status, and the software has a clear prompt for whether the information is sent successfully.
Peripheral control: Support the power amplifier automatic control function.
Multi-text: support GB2312, GBK, BIG5, UNICODE four internal code format text.
2.2 Features of Mountain Torrent Early Warning Broadcasting Wide-area coverage: China Mobile has good coverage in cities and rural areas in 31 provinces across the country, and basically can transmit Mountain Torrent Early Warning broadcasts where mobile phones can make calls.
Always online: As long as the system activates the flash flood warning broadcast application, it will always be online, similar to wireless dedicated line network services.
Billing by volume: Although the wireless dedicated line network service remains always online, it is only billed when communication traffic is generated, and the cost is low.
High-speed transmission: Adopt the bandwidth transmission of the cellular network, which can support the peak transmission rate of 53.6Kbps. The transmission rate is high and the transmission speed is fast.
Real-time release: release and receive information at any time, and can display and broadcast regularly or immediately.
Unlimited expansion: nationwide, as long as the wireless GPRS network covers the place can be used, not limited by distance and location.
Easy installation: As long as there is a wireless mobile network, the flash flood warning broadcast terminal can be powered on.
III. Composition of flash flood warning broadcasts 3.1 Flash flood early warning broadcast release platforms Establish flash flood early warning broadcast release platforms in provinces, cities, counties or towns, and regularly / manually release various types of meteorology, flood control, flood control, agriculture, technology, affairs, etc. Message and send it over the air via wireless mobile network.
3.2 The mountain flood warning broadcast receiving terminal establishes a mountain flood warning broadcast receiving terminal in the district, town or village, scrolls the information LED text through the electronic display screen, and converts it into voice (optional for male and female voices) through the existing loudspeaker through the large speaker ( Tweeter). Real-time notification of weather and other information, so that farmers can take preventive measures.
Note: The speed and frequency of text scrolling, and the number of voice broadcasts of the tweeter can be set arbitrarily according to needs through the meteorological disaster warning and release platform.
4. Principles of mountain flood warning broadcasting 4.1 Principles of mountain flood warning broadcasting The staff of flood control services / scientific and technological information release can control flood control information, weather forecast, geological disasters, science and technology by operating and using the platform of mountain flood / meteorological disaster early warning system connected to the Internet Information such as agriculture, current policy, emergency situation, etc. is released regularly or manually. The published information data is grouped, encapsulated and sent to the Internet transmission via the TCP / IP protocol, and then the Gn interface of the Internet backbone network is connected to the GTP tunnel protocol of the wireless mobile communication network. The UPP / IP protocol report is used as the bearer layer to alert the mountain flood The broadcast 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, wireless mobile communication networks exist where mobile phones can make calls. Mountain flood warning broadcast information will be transmitted through the wireless cellular broadband network transmission technology in the wireless mobile communication network packet-switched transmission coverage.
Mountain flood warning broadcast (also known as wireless warning) terminal is based on wireless mobile communication network for data and voice communication, which can realize the conversion of CDMA / GSM / GPRS data, text, short message, direct telephone dialing into analog voice signal and amplification Input, can convert CDMA / GSM / GPRS data, text, short messages into LED real-time display. And the status of the received information can be reported to the mountain flood warning broadcast platform.
4.2 Schematic diagram of flash flood warning

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