Environmental Flows Monitoring System

1. Environmental Flows Monitoring System Product Introduction

Environmental Flows Monitoring System can remotely monitor the flow of irrigation area/river, for open channels, river channels, irrigation channels and other occasions.Environmental Flows Monitoring System is mainly composed of four parts: Doppler flow meter, data collection, communication network and software platform. Doppler flow meter is a sensor that measures the flow rate and flow rate of water in natural water bodies. Doppler flowmeter is divided into two parts: sensor and host.

The sensor has two transducers, one transmitting and one receiving. When the sensor is facing the direction of the flow, that is, under the premise of counter-flow measurement:

1. When the water flow is stationary, the received frequency is the same as the transmitting frequency.

2. The faster the flow rate, the faster the frequency received by the receiving sensor will be higher than the transmitted frequency.

3. The slower the flow rate, the slower the frequency received by the receiving sensor, but it will be higher than the transmitted frequency.

When the sensor measures along the direction of water flow:

1. When the water flow is stationary, the received frequency is the same as the transmitting frequency.

2. The faster the flow rate, the faster the frequency received by the receiving sensor, but it will be lower than the transmitted frequency.

3. The slower the flow rate, the slower the frequency received by the receiving sensor, but it will be lower than the transmitted frequency.

From the above, the water flow rate and direction of the water flow can be calculated through hardware and software.

2. Working principle of Environmental Flows Monitoring System

Product flow rate measurement is based on the Doppler effect. The probe emits a beam of ultrasonic waves obliquely upward. When the ultrasonic waves contact impurities or bubbles in the fluid, the reflected ultrasonic waves will produce a Doppler frequency shift Δf. The Doppler frequency shift Δf is proportional to the fluid. Flow velocity, the flow velocity V of the fluid can be measured by measuring the Doppler frequency shift Δf.

The product measures liquid level based on a pressure sensor. It can automatically calculate the fluid cross-sectional area S through the set channel parameters. Based on the velocity area method, it can measure the flow rate Q of the liquid.

Q = V × S

Features

l Uses ultrasonic Doppler principle to measure flow velocity and measurement, with high accuracy and small environmental restrictions;

l The velocity area method is used to measure flow, without the need to build weirs and trenches, and the construction cost is low;

lHigh integration, supports simultaneous measurement of flow rate, liquid level, instantaneous flow, cumulative flow, and temperature;

l Comes with a temperature sensor to compensate for the impact of water temperature on the speed of sound;

l Built-in circular, rectangular, trapezoidal, triangular and other pipeline models for easy debugging;

lBionic appearance design effectively reduces garbage occlusion;

lLow power consumption design; operating current is less than 25mA; suitable for battery or solar power supply.

3. Environmental Flows Monitoring System parameter indicators

4. How to use Environmental Flows Monitoring System

1. Installation requirements

Water quality requirements: According to the measurement principle, the water to be measured must contain certain tiny impurities or bubbles, but there should not be too many floating objects in the water to avoid interference.

Water flow pattern requirements: It should be installed downstream of a straight section with a fixed cross-section. The length of the straight section is preferably 5-10 times the hydraulic radius of the channel (the longer the straight section, the higher the measurement accuracy), and within this distance range There must be no overflow obstructions (such as sluices, weirs, etc.) to ensure a uniform and stable flow pattern in the front section of the probe.

2. Installation diagram

5. Introduction to Environmental Flows Monitoring System cloud platform

1. CS architecture software platform supports direct observation on mobile phones and PC browsers without the need to install additional software.

2. Support multiple accounts and multiple devices to log in

3. Support real-time data display and historical data display dashboard

4. Cloud servers and cloud data storage are stable and reliable, easy to expand, and load balanced.

5. Support SMS alarm and threshold setting

6. Support map display and view device information.

7. Support data curve analysis

8. Support data export table format

9. Support data forwarding, HJ-212 protocol, TCP forwarding, http protocol, etc.

10.Support data post-processing function

11.Support external running of javascript scripts