Unmanned aerial vehicle (UAV) flow measurement (and topographic survey)

1) Requirements for drone equipment:

It should be no less than a quadrotor, with propellers, arms, landing gear, and gimbal components adopting a folding structure;

Flight parameters: maximum level flight speed ≥14m/s, maximum climb speed ≥5m/s, maximum cruise speed ≥9m/s, maximum flight altitude ≥5000m;

▲ It can carry multiple modules and quickly replace payloads;

It can achieve a maximum payload ≥2.5kg;

After disassembly, it can be placed in a three-proof transport case;

Maximum takeoff weight ≥9kg;

The drone can take off and land within an area of 3M×3M;

Equipped with intelligent battery monitoring and management functions, it can achieve short-term dynamic discharge of the battery, measure dynamic load voltage, dynamic discharge current, and other data; automatically balance the cell voltage, keeping the battery within a reasonable range in real time and extending its service life;

▲ Endurance: no-load endurance ≥40 minutes; when carrying a payload ≥2.5kg, endurance ≥25 minutes;

The aircraft has a wind resistance rating of above level 7;

Equipped with a laser height-fixing module to ensure precision and stability in takeoff, landing, and flight positions;

Equipped with a radar obstacle avoidance module, it can automatically identify obstacles within 30 meters ahead, trigger an alarm, and return to the starting point;

Equipped with high-definition low-latency image transmission, it features high-definition real-time video transmission and high-definition recording, allowing for the real-time transmission of on-site conditions to a handheld terminal;

▲ The contractor must ensure that each drone has at least three personnel from each corresponding bureau who have obtained a drone pilot's license;

▲ Each set of equipment must be equipped with one terminal that is compatible with the equipment and meets the requirements for operation and data analysis processing;

2) Remote controller:

Display screen: 7-inch or larger touch LCD screen;

IP protection level: IP54 or higher;

Operating ambient temperature: -20°C to 50°C;

3) Flight camera:

Resolution: 1080p;

4) On-board high-precision surveying and mapping lidar

Range: 450m (reflectance 50%, 0 klx);

Planar accuracy: ≤6cm@150m;

Elevation accuracy: ≤5cm@150m;

Ranging accuracy: ≤3cm@150m;

Scanning mode: Non-repetitive scanning, repetitive scanning;

Laser safety level: Class 1;

Sensor: 4/3 CMOS, effective pixels 20 million;

Aperture: f/2.8 to f/11;

Stabilization system: 3 axes (pitch, roll, yaw);

Mechanical angle range: Pitch: -130° to +40°; Translation: ±100°;

Data format: Supports exporting point cloud models in the following standard formats: PNTS/LAS/PLY/PCD/S3MB;

Configuration software: Includes flight mission, control software, and model reconstruction software (supports various visible light precise and efficient 2D and 3D reconstruction, and LiDAR data processing);

5) Flow measurement radar

Operating frequency: ≥24GHz;

Velocity measurement range: 0.3~15m/s;

Velocity measurement accuracy: ±0.01m/s;

Distance measurement range: 0~45m;

Real-time monitoring: Capable of real-time monitoring of flow velocity;

Data recording, historical data, and video playback;

Video resolution: 1080p, 30fps; 720p, 60fps;

Protection level: IP44 or above.