Portable open channel flow meter provides high-precision data support for hydrological monitoring

Portable open channel flow meter uses ultrasonic detection technology to measure flow velocity in channels and pipelines. With no moving parts, it requires minimal maintenance and boasts ±1% flow velocity accuracy and a water depth measurement capability of 0.03 meters. It is suitable for flow monitoring scenarios in hydrology, water conservancy, drainage, and irrigation areas.

Portable open channel flow meter is an acoustic instrument that measures water velocity and flow rate using the Doppler effect. The instrument emits sound waves into the water, which are scattered by suspended particles and other scattering agents. The instrument receives the echo signals and calculates the flow velocity by analyzing the Doppler frequency shift. This measurement method does not rely on mechanical parts, and the instrument can operate underwater for extended periods without experiencing wear and jamming of moving parts. Maintenance frequency is significantly lower than traditional rotor-type flow meters.

The core advantage of Portable open channel flow meter lies in its flow velocity profile measurement capability. Traditional flow measurement methods typically only acquire single-point velocity data, while ADCP can divide a vertical profile into multiple measurement layers, simultaneously acquiring velocity information at different depths, thus calculating a more accurate average velocity. This layered measurement method is particularly suitable for rivers and channels with significant flow variations, capturing the vertical distribution characteristics of water velocity and providing more reliable basic data for hydrological cross-sectional flow calculations.

In terms of application scope, Portable open channel flow meter can cover various operating conditions. Natural rivers and open channels are its main application scenarios, where the instrument can be installed on the riverbed or sidewall for fixed continuous monitoring. For pipeline flow measurement, ADCP can measure flow in both non-full and full pipe conditions, adapting to different cross-sectional shapes such as circular pipes and rectangular channels. Drainage and irrigation monitoring are also important application areas for ADCP; by acquiring real-time velocity and flow data, it can provide a basis for water resource scheduling and management decisions.

Currently, Portable open channel flow meter on the market can be categorized by usage method into mobile, self-contained, and direct-reading types. Mobile ADCPs, mounted on survey vessels, acquire flow data by lateral scanning of cross-sections, making them suitable for large-scale hydrological surveys along major river main streams. Self-contained ADCPs, with built-in batteries and data storage, can operate autonomously underwater for extended periods, making them suitable for long-term observation in marine environments and unmanned stations. When selecting equipment, users must rationally choose parameters such as instrument frequency, range, and number of profile layers based on specific operating conditions and usage requirements to ensure that the measurement data meets actual accuracy requirements.