Groundwater velocity flow direction meter Innovative technology, advanced equipment
Groundwater velocity flow direction meter is not difficult to understand literally, yes, this equipment is an innovative technical product for measuring groundwater flow velocity and flow direction, and this equipment is mainly based on:
1. "Basic Environmental Experimental Conditions and Methods for Hydrological Instruments" GB T 9359-2016;
2. Basic Parameters and General Technical Conditions of Hydrological Instruments GB T 15966-2017;
3. "Graphic Signs for Packaging, Storage and Transportation" GB T 191-2008;
4. Microscope Objective, GB T 2609-2015;
5. "Dam Monitoring Instrument Pore Water Pressure Gauge" GBT 34111-2009 (Part 1: Vibrating wire pore water manometers);
6. Technical Requirements for Reliability of Hydrological Instruments GB T 18185-2014;
7. "Pressure Transmitter" JJG 882-2019.
The high-tech monitoring equipment developed is mainly used in geological survey, university research and other aspects.
Around July and August this year, a certain nuclear power operation and management limited liability company invited to monitor and collect data for the local groundwater flow velocity and flow direction measurement project; In this project, the multi-function acquisition terminal is lowered to the position of the well section to be tested through the meter mark cable and the lifting winch in a single well, and the multi-function acquisition terminal control device and flowPro data analysis and processing software are used to adjust the brightness, contrast, saturation, chromaticity, rotation angle and other parameters of the camera channel according to different conditions, and capture the particle migration information. The visual algorithm and three-dimensional vector algorithm input to the controller through the cable with meter mark determine the flow direction of the ground water flow rate in real time.
The main instrument used in monitoring is the groundwater flow velocity flow direction meter, and the principle of monitoring technology: particle image recognition measurement technology.
Workflow: Use the equipment to monitor groundwater, determine the flow direction of groundwater velocity, and eliminate the interference of the instrument moving up and down to the groundwater body, so it is necessary to stand for more than 15 minutes before the monitoring work begins, and wait for the groundwater body to return to its natural state for monitoring.
In this monitoring, the monitoring frequency of the equipment was set to 5s, multiple sets of data were obtained, and the flow velocity and flow direction of the monitoring points were finally statistically calculated.
The process method is as follows:
1. Collect monitoring well information, including but not limited to: water level, well depth, screen depth, screen length, wellhead diameter, and monitoring well location coordinates.
2. Negotiate with the user to determine the monitoring point and monitoring time, and the monitoring determines the monitoring of 1 meter, 5 meters, two monitoring points, and each point is monitored for more than 30 minutes.
3. Install the groundwater flow velocity flow meter, start and check the operation of the equipment: normal.
4. Put the collection terminal to 1 meter, 5 meters and two points downhole through the well wall support, and stand for more than 15 minutes at each point, and start the monitoring of this point after the monitoring results tend to be stable through the controllerObserve the condition of the well wall and groundwater through the controller, adjust the equipment parameters to optimize the monitoring effect, and automatically record the monitoring data and images during the period.
Among them, the 1-meter point was monitored for 8 hoursThe 5-meter point was monitored for 12 hours.
5. The inspection and monitoring results have been saved, there is no omission in the monitoring points, and the monitoring time meets the monitoring requirements. Turn off the instrument, organize the storage, and end the monitoring.
6. Provide measured data, and the customer will make an overall assessment of the monitoring points.