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Wireless warning broadcasting system
1、 Application scenarios
(1) Reservoir dam flood discharge: Installed downstream of the dam, notify downstream people to pay attention to water level changes during flood discharge.
(2) Disaster linkage warning: When installed in villages and local disaster monitoring point data reaches the threshold, pay attention to risk avoidance.
(3) Water and rain conditions: timely notify villagers to take refuge in case of rainstorm in flood season.
2、 Requirement analysis
When the flood season approaches, the reservoir that has been subjected to heavy rainfall pressure is always ready to overflow. When the reservoir releases flood, downstream responsible units will organize personnel to patrol the downstream river channel upon receiving the flood discharge notice, which consumes a lot of manpower and material resources, and the information transmission effect is not obvious. The inspection method is outdated and single, with slow information transmission speed and small coverage area, which cannot synchronize timely flood discharge information for towns, streets, and most administrative villages along the way, resulting in certain blind spots in the investigation of flood discharge channels, threatening the safety of downstream people's lives and property. In recent years, some of the casualties caused by floods are related to emergency flood discharge from reservoirs.
In order to strengthen the safety management of the downstream flood discharge and water release affected area of the reservoir, do a good job in flood discharge and water release warning work, ensure the safe and orderly progress of flood discharge and water release work, protect the lives and property safety of the affected area, strengthen publicity, and enhance the public's awareness of early warning, warning signs and early warning broadcasting systems can be set up near every residential area along the river, as well as bridges, intersections, ferries, and riverbanks along both sides, to quickly, timely, and accurately disseminate flood discharge information to the public, expand the coverage of flood discharge warning information, improve flood discharge warning capabilities, and minimize casualties and economic losses.
3、 System composition
3.1 System Topology Diagram
3.2 software platform
3.3 Hardware System
The wireless warning broadcasting system center platform is located in the command center, transmitting broadcasting signals and control signals through wireless communication methods such as 2.5G/3G/4G. For remote stations in areas with weak mobile public network signals, FM broadcasting is set up to compensate, achieving full coverage of wireless warning broadcasting signals without the need to set up broadcasting signal transmission lines. The power supply for remote broadcasting station equipment is provided by solar panels, wind turbines, and batteries, without the need for external mains power lines. It is easy to operate and maintain, and the central platform can monitor the status of various equipment in real-time, with a high degree of automation.
At the same time, in order to prevent emergency flood discharge caused by geological reasons such as landslides, landslide monitoring stations are added upstream of the reservoir to collect factors such as mountain displacement, deep displacement, and soil moisture content, providing decision-making basis for emergencies. Due to continuous rainfall, exceeding the warning water level of the reservoir, and other reasons, when it is necessary to open the gate and discharge water from the reservoir, the regulatory department and the village flood control responsible person can use mobile phones/landline phones, text messages, on-site microphones, intercoms, recording playback, and other methods to immediately release emergency warning information to nearby residents through high-power high-frequency horn speakers, notifying relevant villagers to prepare for prevention and evacuation, and reduce losses.
4、 System features
♦ Built in 10 warning methods, covering all warning methods with more choices, allowing managers to flexibly release warning information to the public through various means, fully realizing the value of the warning system.
♦ With B/S and C/S platforms, as long as there is internet access, warning information can be released anywhere. It is convenient to remotely configure and upgrade equipment and software through the central platform without the need for on-site operation.
♦ Targeted warning information can be issued based on the characteristics of the danger. On the B/S or C/S platform, directly select the areas and devices that need to issue warnings. The warning devices can issue warnings separately or in batches simultaneously, which is flexible and efficient.
♦ Automatically report device status information to the platform or mobile phone, including working mode, speaker status, chassis status, power supply mode, battery status, battery level status, etc., to grasp the real-time status of the device at any time, greatly improving management efficiency.
♦ Warning broadcasting equipment can be grouped according to management needs (with no limit on the number of grouped devices), and devices can be grouped for management. Each group's devices can be configured in batches, and the working status of devices can be queried and controlled in batches.
♦ Automatically transmit the volume status of the speaker (high, medium, low, none) back to the platform to monitor the working status of the warning equipment in real time, ensuring timely and effective dissemination of warning information.
♦ Broadcast in Mandarin and local dialect according to the order of broadcasting.
♦ It can be connected to other systems such as rainfall stations, water level stations, and video surveillance systems for linkage, automatically triggering preset content for broadcasting or sound and light alarms.
♦ The device supports mains power of 220V and battery DC power supply, with seamless automatic switching between main and backup power, ensuring safety and stability. On site, a complementary wind solar power supply method is adopted to ensure the continuous and stable operation of the equipment.
♦ It has three roles: administrator, authorized personnel, and backup number. Each role can set 70 numbers, allowing authorized users to use authorized functions normally and legally, while excluding unauthorized and illegal users, ensuring the security of warning information release.
5、 Application effect
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