The channel cross-section automatic flow measurement system is a rail-based automatic flow measurement system suitable for flow measurement in large and medium-sized irrigation channel cross-sections. The automatic flow measurement vehicle (instrument) is the core component of the rail-based channel cross-section automatic flow measurement system. There are three different models of channel cross-section automatic flow measurement vehicles (instruments), all of which feature automatic measurement of flow velocity, water level, and water depth, and can automatically calculate cross-sectional flow. Large and small flow measurement vehicles are self-propelled.

Technical Parameters of Rail-Based 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 wheel

Weight: 50KG

2.Measurement Indicators

Water level measurement accuracy: 5mm@10m (ultrasonic)

Water depth measurement accuracy: 5mm@5m (cable-type), 3mm@5m (pressure-type)

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: Better than 3%

3.Operational Indicators

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 Indicators

Battery capacity: 12V65AH (lithium battery optional)

Charging time: <10 hours

Total power consumption: Standby: <=20W; Operation: <=200W

Operating time per charge: >=4 hours

5.Interface Indicators

Wireless transmission: GPRS 11.5Kbps/ZigBee 115Kbps

Debug interface: DB9 socket, RS485, 115200bps

6.Environmental Indicators

External environment: -10℃ (no ice on water surface) to 40℃, humidity <=95% (no condensation)

Wind resistance: Normal operation under wind speeds up to 50 km/h

Lightning protection: Power interface 4500V

Protection rating: Entire unit IP66, flow velocity sensor IP68

7.Upper Computer Software

Application platform: Windows Server2003, Windows7, Windows 8, Windows 10

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