Drainage monitoring station

1. Overview of drainage monitoring stations

1. Background introduction

The urban drainage pipe network is responsible for urban flood control and drainage, sewage collection and transportation. It is one of the important urban infrastructures. It is related to the stable development of social economy and the stability of people's lives, and plays an important role in ensuring urban development and safe operation. role.

The urban drainage system must not only be well constructed, but more importantly, it must be well operated and managed. However, with the rapid advancement of urbanization, the construction speed and scale of urban drainage pipe networks have accelerated, and management has become increasingly difficult. The drainage system is not perfect, the rainwater and sewage pipes are aging, the pipelines are seriously silted, the sewage is overflowing, the roads are waterlogged, the water environment is deteriorating, the rivers are black and smelly, and urban sewage and wastewater seep into groundwater and pollute water resources. Problems need to be solved urgently. Therefore, a scientific, intelligent, and fully functional comprehensive water level management system is essential.

2. Overall design of drainage monitoring station

1. Drainage pipe network monitoring system architecture

The overall architecture of the drainage pipe network monitoring system mainly consists of the perception layer, network layer and application layer. The software and hardware are organically combined into a drainage pipe network monitoring system with complete functions, powerful functions and stable system .

The sensing layer is mainly composed of different types of sensors such as sewage well liquid level monitors. This layer mainly provides the latest real-time, stable and reliable on-site monitoring data, and provides an effective and stable data source for subsequent management application platforms .

The network layer mainly transmits monitoring data wirelessly and manages application functions to realize transmission expression. System communication networking often uses 4G/NB-IoT and other networking methods.

The application layer implements data storage, data query, data visualization, statistical analysis, equipment query and management, early warning and forecasting, alarm and diagnostic services, pipeline distribution query, equipment distribution, remote scheduling, real-time viewing on the mobile terminal, early warning and forecasting on the mobile terminal and remote A platform for command and control and other daily management functions. The application layer is the main means to achieve human-computer interaction.

2. Perceptual layer composition

The perception layer is a layer that implements monitoring data collection. This layer mainly provides the latest real-time, stable and reliable on-site monitoring data, and provides an effective and stable data source for subsequent management application platforms. The lowest and most important component of the drainage pipe network monitoring system. This layer is mainly composed of some common sewage well liquid level monitors and other sensors to achieve effective collection of monitoring data.

3. Network layer composition

The system network layer often adopts 4G/NB-IoT and other networking methods.

The liquid level monitoring station host often uses 4G/NB-IoT and other communication methods to communicate with the management center station.

The management center station communicates with the superior management department through the Internet dedicated line to realize site monitoring information sharing.

The display platform mainly displays monitoring data through PC terminals, tablets, large screens, wireless terminals, etc., and visualizes the monitoring data, which is helpful for data analysis and management. At the same time, these methods can also be used for management operations.

4. Application layer composition

The application layer is an integral part of the drainage pipe network monitoring system. The application layer realizes data storage, data query, data visualization, statistical analysis, equipment query and management, early warning and forecasting, alarm and diagnostic services, pipeline distribution query, and equipment distribution. , remote dispatching, real-time viewing on the mobile terminal, early warning and forecasting on the mobile terminal, remote command and control and other daily management functions. The application layer is the main means to realize human-computer interaction and also the main way to realize digital management of drainage pipe network monitoring.

3. Drainage monitoring station system design

The urban drainage system is a hidden giant network system due to its deep underground and complex structure, which increases the difficulty of drainage pipe network operation and management. How to rationally plan and manage urban drainage pipe networks, control water pollution, prevent urban waterlogging and solve problems of inflow and infiltration in pipe networks has become an important part of urban construction and sustainable development.

Through the liquid level monitoring of the drainage pipe network, the liquid level data inside the pipeline can be accurately grasped, and the data management method of roughly judging the liquid level can be changed.

Through comprehensive liquid level monitoring of the pipeline network system, the overall operating status of the pipeline network can be grasped in real time.

Through the accumulation of liquid level data, the trend of pipeline liquid level changes over a long time span can be analyzed to achieve scientific prediction.

Combine liquid level data with business application systems and mathematical model software to establish a complete and dynamic pipeline network operation management system and pipeline network operation capability analysis system to lay a solid foundation for scientific operations.

Through real-time monitoring of liquid levels, early warning analysis, and operating status analysis, a scientific operation management system is established to improve managers' ability to control the overall pipe network system, scientific allocation of water volume, and improve operation management efficiency.

In order to monitor the water level more accurately, it is recommended to install one set of equipment every 1 kilometer. An additional set should be installed at the main pipeline at the intersection of the pipeline, and one set should be left at the duplicated location.

1. Composition of liquid level monitoring station

The liquid level monitoring station mainly consists of a rainwater well liquid level monitor, a sewage well liquid level monitor , and an installation bracket (removable). It can detect the water level in the manhole on a large scale, mainly plays an early warning role, and can effectively prevent the occurrence of urban waterlogging.

The liquid level monitoring station can effectively collect data, and can also wirelessly transmit the collected data to the management center. The management center controller can control the valve based on the collected flow data to control the sewage status in the pipeline, making it within a reasonably safe range.

2. Liquid level monitoring station function

2.1 Monitoring and collection function

The liquid level monitoring station can automatically collect water level data and regularly send the currently monitored data to the central station, including system voltage, site number and other parameters.

2.2 Save function

The liquid level monitoring station can automatically save monitoring data within a certain period of time.

2.3 Breakpoint resume function

When the monitoring data cannot be uploaded in time due to poor communication signals at some sites or the uploaded data is missing, the liquid level monitoring station will automatically re-transmit the missing monitoring data the next time it uploads data.

2.4 Alarm function

When the water level exceeds the limited threshold, monitoring data can be collected and uploaded frequently and an alarm function can be provided.

2.5 Remote configuration function

Through the service platform, the working mode of the monitoring equipment of the liquid level monitoring station and the working parameters of the sensor can be remotely configured and read, making the monitoring equipment closer to user needs or on-site usage conditions.

3. Technical parameters of liquid level monitoring station equipment

Sewage well liquid level monitor (FT-PS1)

1. Measuring range: 7 meters (larger ranges can be specified);

2.Measurement method: ultrasonic non-contact;

3.Measurement resolution: 1cm;

4. Measurement accuracy: 0.5%;

5. Collection response time: ≤5s

6. Power supply: built-in DC3.6V/52000mAh large-capacity battery;

7. Structural material: Aluminum alloy paint shell, wear-resistant and corrosion-resistant;

8. Alarm settings: maximum liquid level alarm value, minimum liquid level alarm value setting;

9. Power consumption: static duty current ≤ 0.2mA, average operating current (excluding communication) ≤ 8mA;

10. Communication protocol: complies with the requirements of SL651-2014 "Hydrological Monitoring Data Communication Protocol";

11. Display: 128*64 dot matrix;

12. Installation method: L-shaped bracket wall-mounted installation;

13. The shell has passed the IP68 protection level test and meets the standard requirements of GB/T4208-2017 "Shell Protection Level (IP Code)";

14. Working temperature: -15℃～55℃, the product passed the test of GB/T2423.1-2008 "Environmental Testing of Electrical and Electronic Products Part 2 Test Method Test A: Low Temperature"; the product passed the test of GB/T2423.1-2008 "Electrical Electronic Product Environmental Test Part 2 Test Method Test B: High Temperature》Test;

Monitor firmware program software copyright

4. Comprehensive monitoring and information management platform for urban waterlogging prevention and control

4.1 Data collection software

The data collection software receives the telemetry water accumulation data of all sites of the project in real time through the established network, processes and stores the received data, and writes it into a unified telemetry database for the original system to call the data.

Data acquisition software is mainly used to receive and store raw data from monitoring sites, and is used in conjunction with the telemetry system.

The data receiving part receives the original message data such as water level and voltage from each telemetry site through 4G reception, analyzes and processes the original message, and writes the parsed data into the database table; it can be remotely set, managed and managed through 4G. Change the basic parameters of the site, operating parameters, remote data extraction, and recruitment testing.

4.2 Dynamic monitoring and early warning

By presetting warning thresholds for different warning levels of stagnant water, the data is refreshed from the database, and the monitored real-time data is compared and analyzed with the set thresholds. Different colors and sounds are used to provide early warning reminders when warning thresholds exceeding different levels are exceeded. At the same time, the location of the site flashes, and early warning text messages can be sent to relevant staff.

4.3 Process trend analysis

Combined with the GIS map platform, on the basis of real-time monitoring information floating, it provides monitoring information process trend analysis function. The analysis results are combined with the business characteristics and needs of different elements and displayed through process lines. Provide intuitive information services for users to grasp the process evolution trend of water accumulation monitoring information.

Water accumulation process line and equipment operation information

4Running environment and integration

4.1 Central station equipment composition

(1) Router;

(2) Workstation - mainly performs statistical analysis on the received data;

(3) Server - application/database server;

Central station structure diagram

This project can utilize existing equipment and does not require additional procurement of central equipment.

4.2 Software operating environment

4.2.1 Operating system

Operating system: Windows serverR2 2008 or above 64-bit version.

Application system: Microsoft .Net Framework 4.0 framework (.net framework higher than the above version is acceptable).

This project will utilize existing server operating systems.

4.2.2 Database management system

MySql, SQL Server2012 and above;

This project will utilize the existing database management system.

4.3 Hardware operating environment

4.3.1 Server

This project will utilize existing servers.

4.3.2 Network environment

It has a public IP/private network environment, independent IP address, and independent broadband of more than 2M.

5. Successful cases of sewage monitors

Urban investment construction time of Meilong Town, Minhang District, Shanghai: May 2021

Suzhou Wujiang “Smart Water Affairs” information system construction Construction time: April 2021