May 2018 Luan County Hydrological Station River Runoff Sediment Monitoring System was installed
River channel sediment automatic monitoring system, river runoff sediment automatic monitoring system
1. Instrument use
This product is applied to the automatic monitoring of soil and water loss at Kakou Station, and it can meet the observation of the main relevant parameters of soil and water conservation in the research, management and production of soil and water conservation. The following real-time and accurate data can be provided as needed:
Changes in rainfall, rainfall duration, and rainfall intensity over time;
Small watershed runoff, water flow sediment content, watershed sediment yield / sand transport and their changes over time;
The sediment content of the small river flow (surface layer, middle layer, bottom layer);
The system performs dynamic (surface layer, middle layer, bottom layer) monitoring in real-time online state;
The system arbitrarily recruits the sediment content of different water layers
Large amount of data collection and storage;
Summary and report of measurement data;
Through the computer network / GPRS / local data storage card, measurement data transmission acquisition.
Second, the principle of the instrument
2.1 Overview
The water conservation monitoring and control station system of the small watershed is composed of the work management / data collection and storage main control machine of the soil and water loss automatic monitoring station, the sediment measurement sensor, the ultrasonic water level measurement sensor assembly, and the rain gauge. The rainfall intensity and its change with time and the total rainfall and rainfall duration are measured by a rain gauge. The ultrasonic water level measurement sensor assembly automatically measures the water level change; through the central control computer software and parameter settings, the runoff flow that changes with time is calculated to obtain the real-time change process of runoff flow. In the design of the cylindrical measurement sensor, according to the characteristics of the liquid level change of the low, normal and high water levels, multiple sediment measurement ports are vertically distributed in the runoff profile (the standard system is equipped with 3 sensors) to measure the gradient of the sediment content of the runoff distributed.
Through the sediment content and gradient distribution of the cross section and the flow rate obtained from the water measuring weir, the runoff sediment transport amount is calculated. Control and manage the process data of sediment content, runoff and rainfall measured by each sensor through work management / data storage software and host computer control and store the data, and remotely transmit wirelessly to the management monitoring center through moden when requested Measurement data.
The system framework diagram is as follows:
Figure 1 System framework
The main computer of data collection management adopts industrial control level standard, including the intelligent control management and data collection / storage controller developed by ARM processor. The system can work with the support of solar cells. Under normal circumstances, the system is in sleep state. When rain or runoff occurs, the system is automatically powered on and each sensor starts to work. The system measures, collects and stores sensor data according to the set work requirements. The system has its own hard disk, which can store a lot of data. Through the communication port, the measurement results of each sensor can be dynamically transmitted to the upper computer in real time. You can also send the stored or cleared data to the upper computer at the request of the upper computer. The upper computer can display the converted process data of rainfall, sediment content, runoff, and sediment transport and downloaded historical record data. And can generate Excel tables.
2.2 Sediment measuring instrument (JZ-CGNS1 type)
1: It can realize real-time continuous measurement, data transmission and data analysis and processing of multi-path flow sediment content and flow.
2: Unattended 24/7, automatic measurement and storage of data.
3: Work management data collection and storage The host computer can store a large amount of data locally, and can download data through the R232 interface on the spot.
4: With online real-time monitoring on the host computer, display the dynamic process of each measurement parameter and curve, historical data download function.
5: The sampling frequency and clock can be freely set on the data management host computer on site.
6: Good stability. Independent research and development of sensors, high precision, strong stability and strong ability to resist environmental interference
7: 3D structure diagram of the sediment collector
1: Runoff tube 2: Sampling tube 3: Flow sensor 4: Sampling tube solenoid valve 5: Sample tank 6: Liquid level holder 7: Liquid level sensor 8: Sample tank bracket 9: Drain solenoid valve 10: Drain tube
8: The working principle flow of this sensor:
The water body enters the pipeline from A1, flows out through A2 and pushes the flow sensor, and part of the water body is discharged from A3. The processor C calculates the real-time flow rate based on the flow rate obtained by the flow sensor. B1 collects the surface water body and sends it to the load cell. The collected data is sent to the processor C to obtain the sediment content after processing. After the data is obtained, the sensor D discharges the internal sample from B2 to prepare for the next sampling. The processor C outputs external equipment through 485 or serial port.
2.3: Liquid level flow sensor
According to the actual runoff in the monitoring watershed area, a water measuring weir is built. The height of the water level of the water measuring weir measured by ultrasonic can reach 1 mm, and the flow is calculated using the water measuring weir formula. The software provided contains several commonly used calculation formulas for water measuring weirs, including the calculation formulas for Basel weir, triangular weir, rectangular weir and triangular / rectangular composite weir. Related parameters can be modified through management software to improve calculation accuracy.
(Sedimentation automatic monitor --- control station layout diagram)
3. The basic composition of the system
Serial Number Product Name Model Configuration Detailed Quantity
1 River channel runoff automatic collection system JZ-HW1 split three-layer water level automatic collection equipment
(Included; comes with floating tank, automatic liquid level controller, 3 suction pumps) 1
2 River channel runoff sediment content automatic analysis system (equipment automatic data collector) JZ-HY3 7 inch wide temperature full color touch screen; automatic data storage, setting screen parameters, data display: instantaneous water sample measurement, water sample accumulation, sediment content, Cumulative sediment content 1
3 GPRS data transmission terminal JZ-GPRS mobile, China Unicom, telecommunications three network universal 1
4 River channel production and flow automatic control system JZ-HW1 1 stainless steel intelligent strong electric cabinet contains: 1 intelligent controller, 1 relay, a batch of buttons for cables, etc.
Real-time on-site control of system operation and sampling of runoff water samples can be performed. 1
5 River channel runoff automatic monitoring software comes standard with Windows platform software; implementation: data storage, data curve, data analysis, data export, remote control, etc. 1
6 Accessories standard instruction manual, software CD, certificate, warranty card, pipes, cables, protective ropes and other accessories 1
Our tray is handmade with ceramic, not only can effectively prevent excess water when watering dirty environment, but also very beautiful, can decorate the environment. Our trays can be customized in a variety of colors according to the wishes of customers, while the size and shape can also be customized, which can better decorate different scenes. Our pallets are sturdy, can hold a lot of weight, and are resistant to both low and high temperatures.
Flower Pot,Ceramic Plant Pots,Outdoor Flower Pots,House Plant Pots
Yixing Bocai Pottery Co.,Ltd , https://www.bocaipottery.com