CN108040081A - A kind of twin monitoring operational system of subway station numeral - Google Patents

Abstract

The invention relates to a subway station digital twin monitoring operation and maintenance system, including an existing SCADA subsystem; a sensor acquisition network: including a plurality of sensors, and the sensors are arranged on facilities to be monitored in the subway station; a network camera monitoring unit: including distributed in Multiple network cameras in the subway station; server: used for data collection, analysis and storage, the server is respectively connected to the existing SCADA subsystem, sensor acquisition network and network camera monitoring unit; digital twin model: this model is the actual A three-dimensional digital model consistent with the physical model, which exchanges data with the server and displays the actual operating status of the subway station. Compared with the prior art, the present invention establishes a digital twin model, and presents real-time data from multiple sources through an intuitive three-dimensional digital model, which can more efficiently reflect the actual operating status of the subway station, and can also improve the efficiency of information sharing and data analysis. efficiency.

Description

A digital twin monitoring operation and maintenance system for subway stations

technical field

The invention relates to a subway station monitoring operation and maintenance system, in particular to a subway station digital twin monitoring operation and maintenance system.

Background technique

Digital twin (Digital Twin) refers to a digital copy of physical entities, processes and systems. The digital model obtains and analyzes the real-time information of the physical model through multiple means, and can present various elements in the physical model and the real-time dynamic operation of the entire life cycle, thereby realizing system monitoring operation and maintenance, process and system optimization, event prediction and simulation and other functions.

At present, subway stations use SCADA (Supervisory Control And Data Acquisition) system to realize the monitoring, operation and maintenance management of subway stations, but there are three defects as follows:

(1) Information visualization. In the traditional monitoring operation and maintenance system, the information and status of different facilities and locations are usually displayed using two-dimensional drawings, which is difficult to correspond to the actual physical model. Therefore, in this system, data presentation and fault feedback are not intuitive enough, and it is difficult to intuitively reflect the actual operating status of the building or facility.

(2) Information sharing. In traditional monitoring operation and maintenance systems, information from different fields and sources is often heterogeneous, such as sensor data, video surveillance data, equipment operating status, etc., which are usually displayed and stored separately, and the information lacks a close relationship with the actual model , Such an information management mode will cause a lot of inconvenience to the maintenance work.

(3) Data analysis. For most buildings and facilities, the accumulation of monitoring operation and maintenance data is of great value. In the traditional monitoring operation and maintenance system, due to the insufficient integration of information, the internal relationship between data is difficult to be deeply excavated, thus reducing the operation and maintenance efficiency.

Contents of the invention

The purpose of the present invention is to provide a subway station digital twin monitoring operation and maintenance system in order to overcome the above-mentioned defects in the prior art.

The purpose of the present invention can be achieved through the following technical solutions:

A subway station digital twin monitoring operation and maintenance system, including the existing SCADA subsystem, and the subway station monitoring operation and maintenance system also includes:

Sensor acquisition network: including multiple sensors, the sensors are set on the facilities to be monitored in the subway station;

Network camera monitoring unit: including multiple network cameras distributed in the subway station;

Server: used for data collection, analysis and storage, the server is respectively connected to the existing SCADA subsystem, sensor acquisition network and network camera monitoring unit;

Digital twin model: This model is a three-dimensional digital model consistent with the actual physical model of the subway station. This model exchanges data with the server and displays the actual operating status of the subway station.

The sensors in the sensor acquisition network are equipped with wireless communication modules, thereby forming a wireless sensor network, and the convergence nodes of the wireless sensor network are connected to the server through 3G network communication.

The sensors include an inclination sensor, a crack sensor, a water leakage sensor, and a temperature and humidity sensor.

Between the server and the existing SCADA subsystem:

Network sniffer: capture the binary data stream of the existing SCADA subsystem and analyze it online to obtain the parsed data;

Filter: filter the parsed data to filter out the data required by the user and send it to the server.

The existing SCADA subsystem, the sensor acquisition network and the network camera monitoring unit all communicate with the server through the message queue telemetry transmission protocol, and the server also communicates with the digital twin through the message queue telemetry transmission protocol. Model communication connection.

The digital twin models described include:

Digital twin model construction display module: This module constructs and displays a 3D digital model that is consistent with the actual physical model of the subway station. The 3D digital module includes the distribution of various facilities in the subway station. At the same time, there are SCADA subsystems, sensor acquisition The data collected by the network and the network camera monitoring unit are updated and displayed in real time at the corresponding positions of the specific facilities in the three-dimensional digital model;

Data viewing module: This module displays the actual operation status of the subway station in real time, and allows users to retrieve monitoring data at a specific location for viewing. The monitoring data includes monitoring data transmitted by the existing SCADA subsystem and data collected by the sensor acquisition network. Sensing data and monitoring data collected by the network camera monitoring unit. Compared with prior art, the present invention has following advantage:

(1) The present invention expands the existing SCADA subsystem, applies digital twin technology to it, acquires and integrates existing data, and adds new information sources (including sensor acquisition network and network camera monitoring unit) according to specific needs Collected or monitored data), combining the data with an intuitive three-dimensional model can reflect the actual situation of the subway station more efficiently, and can also improve the efficiency of information sharing and data analysis.

(2) The sensor acquisition network of the present invention utilizes ZigBee, Wi-Fi, 3G and other wireless communication methods to form a wireless sensor network, which can select different network communication methods according to different signal characteristics, and integrate various technologies to the greatest extent in terms of power consumption and transmission rate Resource advantages such as bandwidth, computing power and storage space meet the requirements of various technical indicators and scalability;

(3) the present invention realizes the reliable docking of server and existing SCADA subsystem by network sniffer and filter, has guaranteed the stable reliability of system while not changing original system structure;

(4) The present invention uses the message queue telemetry transmission protocol as the communication protocol of the whole system, which has reliable transmission, flexible message push, low bandwidth, low energy consumption and low cost.

Description of drawings

Fig. 1 is a structural block diagram of the subway station digital twin monitoring operation and maintenance system of the present invention.

In the figure, 1 is the existing SCADA subsystem, 2 is the sensor acquisition network, 3 is the network camera monitoring unit, 4 is the server, and 5 is the digital twin model.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

As shown in Figure 1, a subway station digital twin monitoring operation and maintenance system includes the existing SCADA subsystem 1, and the subway station monitoring operation and maintenance system also includes a sensor acquisition network 2, a network camera monitoring unit 3, a server 4 and a digital twin model 5.

Sensor acquisition network 2: includes multiple sensors, and the sensors are set on the equipment to be monitored in the subway station; the sensors in the sensor acquisition network 2 are all equipped with wireless communication modules, thereby forming a wireless sensor network, and the convergence nodes of the wireless sensor network pass 3G The network communication is connected to the server 4 . Sensors include inclination sensors, crack sensors, water leakage sensors, and temperature and humidity sensors. Using ZigBee, Wi-Fi, 3G and other wireless communication methods to realize wireless sensor networks, can choose different network communication methods according to different signal characteristics, and integrate various technologies to the greatest extent in terms of power consumption, transmission rate, bandwidth, computing power and storage space And other resource advantages, to meet a variety of technical indicators and scalability requirements. The information collected by the sensor collection network 2 complements the detection data of the existing SCADA subsystem 1 to ensure that the collected data can be aggregated to the digital twin model 5 in time.

Network camera monitoring unit 3: including multiple network cameras distributed in subway stations, network camera monitoring unit 3 has the advantages of high video output quality, long detection distance, high video data security, and good interactivity at the front end of the system. It is used in many fields There are already relatively mature applications. Through the real-time processing of camera video signals, motion detection, intrusion detection, human behavior analysis, item theft or movement detection, human facial recognition, crowd monitoring, fireworks monitoring, object tracking and people counting, crowd control, and attention control can be realized , traffic flow control and other advanced applications. The recognition results of the video data collected by the camera will be dynamically presented in the digital twin model. For example, when the subway enters the station in an actual station, the digital twin model will also have a corresponding "digital" subway entering the "digital" model; the actual movement of people, the model The crowd in will also move.

Server 4: used for data collection, analysis and storage, the server 4 is respectively connected to the existing SCADA subsystem 1, the sensor acquisition network 2 and the network camera monitoring unit 3.

Digital twin model 5: This model is a three-dimensional digital model that is consistent with the actual physical model of the subway station. This model exchanges data with the server 4 and displays the actual operating status of the subway station. Specifically, the digital twin model 5 includes: digital twin model construction and display module: this module builds and displays a 3D digital model that is consistent with the actual physical model of the subway station. The 3D digital module includes the distribution of various facilities in the subway station, and the existing The data collected by the SCADA subsystem 1, the sensor acquisition network 2 and the network camera monitoring unit 3 are all updated and displayed in real time at the corresponding positions of the specific facilities in the three-dimensional digital model; data viewing module: this module displays the actual operation status of the subway station in real time, And for the user to retrieve the monitoring data of a specific location for viewing, the monitoring data includes the monitoring data transmitted by the existing SCADA subsystem, the sensing data collected by the sensor collection network, and the monitoring data collected by the network camera monitoring unit. Specifically, the above-mentioned three-dimensional digital model corresponds to both the facilities in the subway station and specific behaviors. For example, if there is an elevator in the actual station, then there is also an elevator in the corresponding position in the digital model, and the actual elevator is moving. The corresponding elevator in the digital model is also moving (obtained by the monitoring data of the network camera monitoring unit 3); or a certain sensor in the tunnel detects a crack, so the corresponding position in the digital model will have a display of crack and give a warning. In addition, the 3D digital model should be able to reflect the actual operating state of the actual model, including real-time data from sensors and cameras and real-time data from SCADA. These data will be displayed numerically at specific positions of the model, and will also be presented as a dynamic model.

Between the server 4 and the existing SCADA subsystem 1, there are:

Network sniffer: capture the binary data stream of the existing SCADA subsystem 1 and parse it online to obtain the parsed data;

Filter: filter the parsed data to filter out the data required by the user and send it to the server 4 .

The existing SCADA subsystem 1, sensor acquisition network 2, and network camera monitoring unit 3 are all connected to the server 4 through the message queue telemetry transmission protocol, and the server 4 is also connected to the digital twin model 5 through the message queue telemetry transmission protocol. In order to ensure the timeliness and arrival rate of data exchange, this solution uses Message Queuing Telemetry Transport (MQTT, Message Queuing Telemetry Transport) as the communication protocol.

MQTT is a lightweight open source communication protocol developed by IBM. This protocol is widely used in the Internet of Things, supports multiple platforms, and can connect almost all nodes of networked sensors, actuators, and controllers. The biggest feature of MQTT is that the transmission overhead is very small, and the fixed message header is only 2 bytes. MQTT supports three quality of information delivery (QoS) to meet different message transmission requirements. MQTT supports durable subscriptions, and can use the Last Will/Testament feature to discover clients that are unexpectedly dropped. The advantages of MQTT in this solution are:

(1) The transmission is reliable. MQTT can ensure reliable and secure transmission of messages, and can be easily integrated with enterprise applications.

(2) Flexible message push. Based on the client/server 4 architecture, MQTT adopts the subscription/publish data exchange method, supports real-time message notification, pushes rich content, and supports message storage and filtering.

(3) Low bandwidth, low energy consumption, and low cost. Occupies less mobile application bandwidth, high bandwidth utilization, and less power consumption.

There is a large amount of information interaction between the sensor acquisition network 2, the network camera monitoring unit 3, the existing SCADA subsystem 1, the server 4 and the database, and these data will interact with the server 4 as the center through a suitable communication protocol. The data from the sensor acquisition network 2, the network camera monitoring unit 3, the existing SCADA subsystem 1, etc. are aggregated to the server 4 in real time, and stored in the database after being processed by the server 4. The digital twin model dynamically displays the actual operating status of the station. When users view the data at a specific location, they only need to click the button at the corresponding position of the digital twin model, and the digital twin model then requests the corresponding data from the database and presents it. The operation information released by the user in the digital twin model will also be sent to the sensor acquisition network 2, the network camera monitoring unit 3, and the information capture module of the existing SCADA subsystem 1 through the server 4 to achieve different functions. The data interaction process adopts a common communication protocol, and the mobile device can also install the corresponding communication protocol software to access the data so as to grasp the monitoring operation and maintenance status anytime and anywhere. The possible future system expansion only needs to follow the corresponding communication protocol for access. All data transmission processes are encrypted to improve system security.

Claims (6)

1. A subway station digital twin monitoring operation and maintenance system, including the existing SCADA subsystem (1), is characterized in that the subway station monitoring operation and maintenance system also includes: Sensor collection network (2): comprises a plurality of sensors, and described sensor is arranged on the facility to be monitored in the subway station; Network camera monitoring unit (3): comprising a plurality of network cameras distributed in the subway station; Server (4): used for data collection, analysis and storage, the server (4) is respectively connected to the existing SCADA subsystem (1), sensor acquisition network (2) and network camera monitoring unit (3); Digital twin model (5): This model is a three-dimensional digital model consistent with the actual physical model of the subway station. This model exchanges data with the server (4) and displays the actual operating status of the subway station. 2. A kind of subway station digital twin monitoring operation and maintenance system according to claim 1, is characterized in that, the sensor in the sensor acquisition network (2) is all equipped with a wireless communication module, and then forms a wireless sensor network, the wireless sensor network The convergence node is connected to the server (4) through 3G network communication. 3. A subway station digital twin monitoring operation and maintenance system according to any one of claims 1 or 2, wherein said sensors include inclination sensors, crack sensors, water leakage sensors, and temperature and humidity sensors. 4. a kind of metro station digital twin monitoring operation and maintenance system according to claim 1, is characterized in that, be provided with between described server (4) and existing SCADA subsystem (1): Network sniffer: capture the binary data stream of the existing SCADA subsystem (1) and parse it online to obtain the parsed data; Filter: filter the parsed data to filter out the data required by the user and send it to the server (4). 5. A kind of subway station digital twin monitoring operation and maintenance system according to claim 1, is characterized in that, described existing SCADA subsystem (1), sensor acquisition network (2) and network camera monitoring unit (3) Both communicate with the server (4) through the message queue telemetry transmission protocol, and the server (4) also communicates with the digital twin model (5) through the message queue telemetry transmission protocol. 6. A kind of subway station digital twin monitoring operation and maintenance system according to claim 1, is characterized in that, described digital twin model (5) comprises: Digital twin model construction and display module: This module constructs and displays a 3D digital model that is consistent with the actual physical model of the subway station. The 3D digital module includes the distribution of various facilities in the subway station. At the same time, there are SCADA subsystems (1) , the data collected by the sensor collection network (2) and the network camera monitoring unit (3) are all updated and displayed in real time at the corresponding positions of the specific facilities in the three-dimensional digital model; Data viewing module: This module displays the actual operation status of the subway station in real time, and allows users to retrieve monitoring data at a specific location for viewing. The monitoring data includes monitoring data transmitted by the existing SCADA subsystem and data collected by the sensor acquisition network. Sensing data and monitoring data collected by the network camera monitoring unit.