Dayu Ultrasonic Level Gauge Applied for Seawater Aquaculture Drainage Flow Monitoring in Ningde City
Project Overview:
Sampling time: July 2022
Project location: Hengyu Village aquaculture base, Ningde City
Products used: integrated ultrasonic level gauge, etc.;
Project overview: Due to the data requirements of the Fujian Institute of Oceanography for sampling the drainage flow of marine aquaculture, Dayu Electronics fully cooperated with the institute to conduct 24-hour flow monitoring and sampling at four seaward sluice gates of the Hengyu Village aquaculture farm.
Theoretical reference: Single-orifice sluice gate flow calculation
Q =μO b e√2gh
μO: discharge coefficient, calculated according to the orifice discharge coefficient of a flat sluice gate on level ground, μO=0.6-0.176e/h
Default value taken as 0.6.
b: gate width (equipment parameter)
e: gate lift height (received input)
g: gravitational acceleration, 9.81m/s2 (equipment parameter)
h: water level height at the station (absolute value of the difference between upstream water level and downstream water level)
Q: discharge flow, according to the environmental verification data (when the downstream water level is higher than the upstream water level, the flow is negative);
(Note: The photo shooting time for each sluice gate below is within ±3 minutes of the time displayed on the recorder)
Software overview: Based on the single-orifice sluice gate flow calculation formula, the self-developed software by Dayu Electronics can randomly extract flow data from sampling time periods according to the gate opening time, as shown in the figure below:
On-site Overview of Each Sluice Gate in Hengyu Village
No. 1 Sluice Gate
Installation completed at: around 11:10
Panoramic view of No. 1 sluice gate
Ultrasonic level gauge1-1 installation:
Front side is the inner pond Level gauge reference zero value: 467mm; Recorder: displayed and recorded on Channel 1;
Ultrasonic level gauge1-2 installation:
Rear side is the open sea Level gauge reference zero value: 507mm; Recorder: displayed and recorded on Channel 2;
Recorder for No. 1 sluice gate:
Recorder start time: around 11:00 on July 19, 2022
Recorder description: Channel 1 displays and records the water level of the inner pond upstream of the gate; Channel 2 displays and records the water level of the open sea downstream of the gate
No. 2 Sluice Gate
Panoramic view of No. 2 sluice gate
Ultrasonic level gauge2-1 installation:
Front side is the inner pond Level gauge reference zero value: 460mm Recorder: displayed and recorded on Channel 1;
Ultrasonic level gauge2-2 installation:
Rear side is the open sea Level gauge reference zero value: 520mm Recorder: displayed and recorded on Channel 2;
Recorder for No. 2 sluice gate:
Recorder start time: around 11:50 on July 19, 2022
Recorder description: Channel 1 displays and records the water level of the inner pond upstream of the gate; Channel 2 displays and records the water level of the open sea downstream of the gate
No. 3 Sluice Gate
Installation completed at: around 12:30 on July 19, 2022
Panoramic view of No. 3 sluice gate on site
Ultrasonic level gauge3-1 installation:
Upstream of the gate is the inner pond Level gauge reference zero value: 477mm Recorder: displayed and recorded on Channel 1;
Ultrasonic level gauge3-2 installation:
Downstream of the gate is the open sea Level gauge reference zero value: 504mm Recorder: displayed and recorded on Channel 2;
Recorder for No. 3 sluice gate:
Recorder start time: around 12:15 on July 19, 2022
Recorder description: Channel 1 displays and records the water level of the inner pond upstream of the gate; Channel 2 displays and records the water level of the open sea downstream of the gate
No. 4 Sluice Gate
Installation completed at: around 18:20 on July 19, 2022
Panoramic view of No. 4 sluice gate on site
Ultrasonic level gauge 4-1 installation:
Upstream of the gate is the inner pond Level gauge reference zero value: 630mm; Recorder: displayed and recorded on Channel 1;
Upstream installation view
Ultrasonic level gauge 4-2 installation:
Downstream of the gate is the open sea Level gauge reference zero value: 594mm; Recorder: displayed and recorded on Channel 2;
Downstream installation view
Recorder for No. 4:
Recorder start time: around 18:10 on July 19, 2022
Recorder description: Channel 1 displays and records the water level of the inner pond upstream of the gate; Channel 2 displays and records the water level of the open sea downstream of the gate
