▲ The flow measurement equipment integrates propeller current meter flow measurement, radar wave flow measurement, and vertical lead fish ADCP flow measurement. The three sets of flow measurement devices can measure flow independently or in combination with any two sets for mutual comparison and generation of comparison reports;
▲ The contractor must provide a complete and effective installation and commissioning plan as well as a lightning protection plan for the equipment to ensure maximum protection of the instruments;
The flow measurement equipment has the function of timing flow measurement and flow measurement with water level changes, which can meet the automatic flow measurement function under unattended operation;
The flow measurement equipment can automatically generate a flow measurement plan that meets hydrological specifications based on real-time data of river channels and water levels, including the number of vertical lines, their positions, and the flow measurement methods. During the flow measurement process, it can automatically or manually increase or decrease vertical lines and adjust their positions according to real-time water level changes;
The flow measurement equipment has an "one-click upgrade" emergency protection function, equipped with horizontal, vertical, and bottom-touch mechanical limit protection devices;
The flow measurement equipment automatically generates reports after completing flow measurement, and the report format fully complies with hydrological specifications, which can be directly used for compilation. Before the report is generated, if there are objections to the measurement points, any measurement point can be remeasured at any time. Once the report is generated, the data cannot be modified to prevent tampering with the original data and ensure the authenticity and reliability of the data measurement;
The flow measurement equipment software integrates three video monitoring screens, each image can be zoomed in or out individually, facilitating observation of the flow measurement situation;
▲ The vertical ADCP is integrated into the lead fish, eliminating the need for frequent disassembly and assembly of the ADCP, ensuring faster and more convenient flow measurement with the ADCP;
Surface signals, current meter signals, and bottom-touch signals use digital signals and communicate through a dual-channel wireless transmission protocol of 2.4G/5G and LoRa, with a transmission distance of 5km, ensuring dual insurance for communication and no data loss. The lifting box is equipped with a 40AH/24V lithium battery, which can automatically charge the lifting box;
It has a propeller current meter signal vibration elimination function to prevent the occurrence of multiple recording and missing recording of signals, ensuring the accuracy of flow measurement signals;
Flow rate measurement:
Scope of application: Current meter with 20 rpm, 5 rpm, 1 rpm, and 1/2 rpm as one signal (the signal speed value of the current meter can be set arbitrarily on the host computer);
Speed measurement duration: 100S, 60S, 30S... It can observe the flood changes in the river channel and is set and saved according to the measurement specifications;
Accuracy: 0.1 second; Counting: No error;
Character and graphic display: Flow rate, counting, timing value;
Image monitoring equipment:
Pixel: Over 4 million infrared network high-definition intelligent dome camera, gun camera;
Video compression standard: H.264, etc.;
Compressed output bit rate: 32Kbps~8Mbps;
Automatic gain, CCD aperture control, backlight compensation: ON/OFF selectable;
Communication interface: 10M/100M adaptive Ethernet port;
Operating temperature and humidity: -30°C ~ +60°C, humidity less than 95% (no condensation);
Required power supply, power consumption: AC220V ±10%, 50Hz, 7.5W max;
General functions: One-click recovery, anti-flicker, mirroring, dual stream, heartbeat, password protection, etc;
Radar current meter:
Frequency band: 24.000~24.250 GHz;
Velocity measurement range: 0.30~15m/s;
Operating range: 0.5~30m;
Resolution: 0.01 m/s;
Velocity measurement accuracy: ±0.02 m/s;
Startup time: <3s;
Measurement time: 3~240s;
Communication interfaces: RS485, RS232, SDI-12, 4-20mA, etc.;
Test angle: Built-in automatic angle measurement function, automatic calibration of flow velocity at pitch angles of 30~60 degrees;
Detection method: Non-contact detection;
Current meter:
Speed measurement range: 0.04~10.0m/s;
Operating water depth: 0.16~50m;
Operating water temperature: 0°C(non-freezing) ~ 50°C;
Operating water quality: fresh water or turbid water containing sediment (sediment concentration ≤100kg/m³);
Continuous operating time: 72h;
Instrument starting speed: 0.03m/s;
Instrument critical speed: 0.08m/s;
Mean square deviation of verification formula: m≤0.8%;
Blade pitch: 250mm;
Blade Rotating Diameter: 120mm;
Propeller Material: PC Engineering Plastic;
Body Material: 304 Stainless Steel;
Vertical Plumb-Line ADCP;
▲Frequency: 1200kHz or 600kHz;
Maximum Flow Measurement Distance: 0.2~35m;
Velocity Measurement Range: ±10m/s;
Accuracy: ±0.25%±2mm/s;
Resolution: 1mm/s;
Layer Thickness: 0.1~2m;
Number of Layers: 1~260;
Bottom Tracking Range: 0.5~55m;
Bottom tracking accuracy: ±0.25%±2mm/s;
Tilt beam sounding range: 0.5~55m;
Vertical beam sounding range: 0.2~160m;
Transducer configuration: 5 beams;
Data update rate: 1~2Hz, maximum 5Hz;
Baud rate: 2400 ~ 115200;
Power supply and communication power consumption: ≤3W;
Communication protocol: RS485, RS424, RS232 or 10M/100M adaptive Ethernet port;
Cooperate with the contractor to complete the calibration work requirements.
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