Do you know several methods for measuring flow in irrigation areas using gate flow meters?

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1. Solution for Reservoir Water Diversion

In response to the problem of reservoir water diversion, combined with the uneven distribution of water resources and asynchronous water supply and consumption processes, it is necessary to achieve accurate monitoring and transmission of flow, rainfall, water level and other data through regulating the reservoir. The following is a specific solution:

1. Scheme Composition and Core Objectives: The scheme aims to solve the problem of low accuracy and high susceptibility to upstream and downstream changes in traditional flow monitoring methods (such as hydraulic structure method and gate opening change algorithm) through the construction of a matching regulating reservoir. The core objectives include: precise monitoring: achieving real-time high-precision measurement of flow, rainfall, and water level. Data transmission: Sensor data is transmitted to a server through wired or wireless networks. Visual display: Overlay sensor data onto the video screen, supporting synchronized display of multiple elements.

2. Comparison and selection of flow measurement methods. Choose the type of flow meter according to the application scenario. The common methods and characteristics are as follows: Hydraulic structure method. Applicable scenario: Low precision measurement of existing hydraulic structures.

. Disadvantages: It requires manual verification of water level and flow rate curves, and needs to be rechecked when the upstream and downstream relationships change, resulting in low measurement accuracy. Cost: The equipment price is low, but the manual maintenance cost is high. The applicable scenario of the channel weir flow measurement method is the scenario where a Gate flowmeter

weir weir can be installed and civil engineering can be carried out. Disadvantages: Weir channels obstruct water flow, require a large amount of construction, and result in head loss; Non standard weir channel dimensions can significantly affect accuracy. Cost: The equipment price is low, but the construction cost is high. Doppler ultrasonic flowmeter (velocity area method) is suitable for fixed installation at the bottom of channels and high-precision measurement scenarios. Advantages: Easy installation, no need for weirs; It can measure flow velocities as low as 0.02m/s, with no water flow obstruction and an accuracy of ± 1%. Cost: The equipment price is moderate and the installation cost is low. Radar flowmeter (velocity area method) is suitable for scenarios with harsh environments and low precision requirements. Disadvantage: Water fluctuation is required, with an initial flow velocity requirement of 0.1m/s; Measuring surface flow velocity requires manual calibration. Cost: The equipment price is high, and the installation cost is moderate. Selection suggestion: Prioritize Doppler ultrasonic flowmeter: When the installation environment is free of debris and the flow rate is low, it has high contact measurement accuracy and low cost. Choose a radar flowmeter: suitable for non-contact measurement requirements in harsh installation environments and long-term high water flow velocities.

III. Sensor and Data Acquisition System Flow Meter Selection Contact Doppler Ultrasonic Flow Meter: Fixed at the bottom of the channel, directly measures the average flow velocity of the cross-section, with a starting flow velocity as low as 0.02m/s.

. Non contact radar flowmeter: fixed above the channel, requires water fluctua

1. Solution for Reservoir Water Diversion

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