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      The rail-mounted channel section automatic flow measurement vehicle is a rail-based automatic flow measurement system developed by Tianjin Water Transport Engineering Survey and Design Institute Co., Ltd., designed for open channel cross-section flow measurement. It provides a fully automated water measurement solution by automatically calculating cross-sectional flow through parameters such as flow velocity, water level, and water depth, enabling intelligent flow measurement in channel sections. This irrigation district flow measurement technology can be equipped with various flow velocity sensors, including propeller current meters, electromagnetic current meters, and ultrasonic flow meters. It supports both cable-type and pressure-based water depth measurement. Compared with traditional irrigation water measurement techniques, it offers significant advantages such as high accuracy, efficiency, and strong applicability. This technology addresses practical measurement challenges in online monitoring and metering at water intakes in large and medium-sized irrigation districts. It can be widely applied in main canals, branch canals, and field channels within irrigation districts, as well as in rivers, reservoirs, and waterways across the country, achieving true unmanned operation and fully automated flow measurement.

Technical Specifications of the Rail-Mounted Flow Measurement Vehicle:

1.Flow Measurement Vehicle Body

Length: 1400mm × Width: 700mm × Height: 700mm

Wheelbase: 550mm

Axle Track: 800mm

Drive Method: Gear reduction rear-wheel drive

Shell Material: Galvanized sheet + molded plastic

Caster Material: Cast iron V-groove wheels

Weight: 50KG

2.Measurement Specifications

Water Level Measurement Accuracy: 5mm@10m (ultrasonic)

Water Depth Measurement Accuracy: 5mm@5m (cable-type), 3mm@5m (pressure-based)

Flow Velocity Sensor A: Propeller current meter (0.04–10m/s, 1.5%FS)

Flow Velocity Sensor B: Electromagnetic current meter (0.02–5m/s, 1.0%FS)

Flow Calculation Accuracy: Better than 3%

3.Operational Specifications

Control Methods: Local control, remote control, handheld terminal control (optional)

Forward Speed: 30cm/s

Lifting Speed: ≥5cm/s

Dynamic Response Delay: ≤50ms

Single-Point Flow Velocity Measurement Time: 30s, 60s, 90s, 120s

4.Electrical Specifications

Battery Capacity: 12V65AH (lithium battery optional)

Charging Time: <10 hours

Power Consumption: Standby: ≤20W; Operation: ≤200W

Operating Time per Charge: ≥4 hours

5.Interface Specifications

Wireless Transmission: GPRS 11.5Kbps / ZigBee 115Kbps

Debugging Interface: DB9 socket, RS485, 115200bps

6.Environmental Specifications

External Environment: -10°C (ice-free water surface) to 40°C, humidity ≤95% (no condensation)

Wind Resistance: Operates normally under wind speeds up to 50 km/h

Lightning Protection: Power interface 4500V

Protection Rating: Entire vehicle IP66, flow velocity sensor IP68

7.Upper Computer Software

Application Platform: Windows Server 2003, Windows 7, Windows 8, Windows 10

Network Type: Long-distance data transmission; supports control of multiple flow measurement vehicles with a fixed IP, otherwise supports single-unit control