Views: 0 Author: Site Editor Publish Time: 2025-07-10 Origin: Site
Flash floods are common natural disasters in mountainous areas of China, characterized by their sudden onset, high destructiveness, and rapid development. Traditional monitoring and early warning methods often suffer from issues such as low precision, insufficient lead time, and difficulty in obtaining information. BGT Hydromet leveraging years of technical expertise, has innovatively developed the "Acoustic-Optical-Electronic Monitoring and Alarm Station for Flash Floods." This system integrates Internet of Things (IoT), edge computing, and intelligent early warning technologies to create an integrated solution for "monitoring-warning-response," effectively enhancing the capabilities for flash flood disaster prevention.
Flash floods strike swiftly and cause rapid devastation. The terrain and rainfall patterns in mountainous river basins lead to significant and abrupt increases in water levels, drastically reducing the time available for residents to evacuate safely. This poses considerable challenges for flash flood prevention and mitigation.
The system is deployed in small watersheds to monitor and display real-time rainfall and river water levels. Data is transmitted wirelessly to cloud-based alarm devices. The system directly determines early warnings at the device level, and when monitoring data exceeds threshold values, it simultaneously sends alarm information to the monitoring and early warning platform and relevant flood control personnel.
The Acoustic-Optical-Electronic Monitoring and Alarm Station can establish associations between two or more devices through IoT or software platform interactions. When an upstream device triggers an alarm, downstream devices simultaneously issue coordinated alarms.
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Acoustic-Optical-Electronic Alarm Station | Cloud Alarm Device |
The system adopts a "terminal-edge-cloud" collaborative architecture, enabling intelligent early warning through data collection, edge computing, and cloud coordination.
Key features include:
· Multi-source data collection: Simultaneous collection of rainfall and water level data, with support for image and video capture.
· Edge-based early warning: Built-in edge early warning models with audio output interfaces to directly drive alarm sirens, supporting voice and flashing alarms, and manual disabling of false alarms.
· Intelligent linkage: Supports establishing associations between multiple monitoring and alarm stations within the same watershed for coordinated alarming.
· Remote management: Enables device data monitoring, status checks, parameter configuration, and online upgrades without manual intervention.
Key features include:
· Multi-mode early warning: Three operational modes (prompt, reminder, alert) with adaptive acoustic and visual effects based on risk levels.
· Intelligent calling: Embedded multi-level intelligent calling models supporting multi-channel targeted early warning dissemination via WeChat, SMS, and phone calls.
· Public service: Provides rainfall reminders to guide daily life and travel arrangements.
· Emergency response: Supports one-button alarm confirmation and false alarm cancellation mechanisms.
· Main Control Unit: Operating temperature -10°C to 55°C, MTBF ≥ 50,000 hours.
· Tipping Bucket Rain Gauge: Resolution 0.5mm, accuracy ≤ ±4%.
· Radar Water Level Sensor: Measurement range 0.1 to 45m, accuracy ±3mm.
· Alarm Light and Siren: Light intensity ≥ 1000lx, audio output power 2x50W.
· Battery life: Over 24 hours of operation after external power loss.
· Communication methods: Supports LoRaMesh and 4G.
· Alarm light specifications: Seven-color ring alarm light with a diameter > 100mm.
Installations should be based on flash flood risk assessment results in key administrative villages, focusing on small watersheds. Stations should be placed in upstream areas of rivers and streams in villages and communities threatened by flash floods, including:
· Upstream riverbanks.
· Riverbank recreational areas.
· Downstream slopes of water storage and drainage facilities.
· Confluence points of main and tributary streams.
· Bridge upstreams prone to congestion.
Requirements include:
· Pole height exceeding 3000mm, made of galvanized steel.
· Flange dimensions: 350mm x 350mm x 10mm.
· Grounding resistance ≤ 10Ω.
Requirements include:
· Optimal height for visibility and audibility.
· Secure power supply and network connectivity.
· Usage instructions posted nearby with user training.
The system employs standardized data collection, transmission, and processing workflows to ensure timely and accurate information dissemination.
Provides weather forecasts, meteorological risk alerts, and rainfall reminders to enhance daily utility and ensure device maintenance.
Plays disaster prevention audio through cloud alarm devices, educating residents on hazard identification and emergency response during non-flood seasons.
Utilizes an intelligent voice calling module linked to community-based flood prevention systems, featuring multi-level alert mechanisms. Upon triggering high-level alerts, the system immediately notifies local flood control officials via phone and sends WeChat or SMS alerts to village and community leaders for confirmation before disseminating warnings to at-risk populations.
The platform performs device self-checks to monitor operational status, with communication frames adhering to the "Hydrological Monitoring Data Communication Protocol" (SL651-2014).
Post-installation debugging ensures accurate data collection, online management platform connectivity, correct alarm threshold settings, proper association of flood control personnel, and unobstructed early warning transmission.
Local Acoustic-Optical-Electronic Monitoring and Alarm Station (V2)
No. | Equipment Name | Unit | Quantity | Specifications | Unit Price (CNY) |
1 | Tipping Bucket Rain Gauge | set | 1 | - | |
2 | Radar Water Level Meter | set | 1 | - | |
3 | Main Control Unit | set | 1 | - | |
4 | Warning Light | piece | 1 | - | |
5 | Loudspeaker | piece | 2 | 50W | - |
6 | Display Screen | piece | 1 | - | |
7 | PTZ Camera (Ball Camera) | piece | 1 | - | |
8 | Solar Panel | piece | 1 | 18V/100W | - |
9 | Battery | piece | 1 | 12V/100Ah | - |
10 | Integrated Cabinet | set | 1 | - | |
11 | Solar Charge Controller | piece | 1 | - | |
12 | Surge Protector | piece | 1 | - | |
13 | Data SIM Card | piece | 1 | 100GB/month, 3-year plan | - |
14 | Communication Fee | item | 1 | - | |
15 | Pole and Mounting Bracket | set | 1 | - | |
16 | Bracket and Cross Arm | set | 1 | - | |
17 | Lightning Protection Grounding | set | 1 | - | |
18 | Civil Works and Installation | set | 1 |
This system achieves:
1. Precise targeted delivery of early warning information.
2. Direct regional push notifications to households.
3. Enhanced adaptability of monitoring and early warning equipment.
4. Improved practicality of early warning products.
The Flash Flood Disaster Monitoring and Early Warning System have been successfully deployed in multiple regions, this is the product that we use most frequently in our current project. The system has significantly bolstered flash flood disaster prevention capabilities, providing robust technical support for protecting lives and property.
7.1. Local Acoustic-Optical-Electronic Monitoring and Alarm Station
7.1.1. Main Control Unit
(1) Operating voltage: DC 9~24V
(2) Standby power consumption: ≤10mA
(3) Compliant with SL 651-2014 Hydrometeorological Data Communication Protocol
(4) Operating temperature: -10℃~55℃
(5) Operating humidity: ≤95% (40℃)
(6) Mean Time Between Failures (MTBF): ≥50,000 hours
7.1.2. Tipping Bucket Rain Gauge
(1) Rain collector inlet diameter: Φ200+0.6 0mm
(2) Rain collector edge angle: 40°~45°
(3) Rain collector depth: ≥100mm
(4) Resolution: 0.5mm
(5) Accuracy: ≤±4%
(6) Repeatability: ≤1%
(7) Wetting loss: ≤15.7g
(8) Rainfall intensity measurement range: 0mm/min~4mm/min, maximum allowable rainfall intensity: 8mm/min
(9) Outer cylinder material: Stainless steel
(10) Operating temperature: 0℃~55℃
(11) Operating humidity: ≤95% RH (40℃ condensation)
(12) Process requirements: To ensure that rainfall entering the collector does not splash out, the collector edge must be sharp and blade-shaped, made of deformation-resistant material via turning process.
7.1.3. Radar Water Level Meter
(1) Measurement range: 0.1~45m
(2) Operating frequency: 80GHz
(3) Measurement accuracy: ±3mm
(4) Operating mode: FMCW (Frequency-Modulated Continuous Wave)
(5) Resolution: 1mm (full range)
(6) Antenna type: Planar array antenna
(7) Antenna beam angle: ≤8°
(8) Power supply range: DC 6~30V
(9) Communication interface: RS-485
(10) Operating temperature: -40℃~75℃
(11) Operating humidity: 95% RH (40℃ condensation)
(12) Protection rating: IP68
7.1.4. Warning Light
(1) Light intensity (lx): ≥1000
(2) Color: Red
(3) Light source material: LED
7.1.5. Loudspeaker
(1) Audio output power: 2×50W
(2) Output impedance: 4 ohms
7.1.6. Display Screen
(1) Panel size: 440mm×800mm
(2) Display area: 304mm×304mm
(3) Panel substrate: Aluminum-based board
(4) Film material: Class III reflective film
(5) Panel thickness: 3mm
(6) Overall thickness: <90mm
(7) Display unit: Red light-emitting elements, 64×64 matrix, refresh rate 600Hz, constant current drive
(8) Control cabinet: Panel integrated with waterproof control unit
(9) Communication interface: RS485
(10) Power supply range: DC 9~18V
7.1.7. Camera
(1) Sensor type: 1/2.8-inch CMOS
(2) Resolution: 2MP
(3) Maximum resolution: 1920×1080
(4) Minimum illumination: Color: 0.005lux/F1.6; B/W: 0.0005lux/F1.6; 0Lux (with supplemental light)
(5) Field of view: Horizontal: 58.0°~3.7°; Vertical: 33.5°~2.0°; Diagonal: 66.2°~4.0°
(6) Optical zoom: 23×; Digital zoom: 16×
(7) Rotation range: Horizontal: 0°~360° continuous rotation; Vertical: -15°~+90° with auto-flip (180°) for continuous monitoring
(8) Video compression standards: Smart H.265; H.265; Smart H.264; H.264; H.264B; H.264H; MJPEG
(9) Compliance standard: GB/T 28181
(10) Interface types: RJ45, RS485
7.2. Cloud Alarm Device
(1) Power specification: DC 5V/1A
(2) Power interface: Type-C
(3) Battery life: Built-in high-performance battery, operates for >24h after external power loss
(4) Communication method: Supports LoRaMesh and 4G
(5) Antenna type: Integrated multi-mode multi-band antenna
(6) Warning light specification: Seven-color ring warning light, diameter >100mm
(7) Device dimensions: ≥120mm×120mm
(8) Speaker power: 3W
(9) Operating temperature: 0~45℃
(10) Storage temperature: -20~60℃
