1. Program overview

When the grain is stored, heat and mildew will occur due to excessive temperature and humidity. Many grain storage depots cover a wide area, are large in scale, have a large number of warehouses, and have a large capacity. Manual inspection is difficult to ensure timely and accurate grasp of the changes in various monitoring indicators during the storage process. The grain depot management system uses electronic, computer, and network technology to realize real-time detection of the temperature and humidity of the grain depot. If it exceeds the standard, the ventilation equipment will be turned on to cool down the temperature and humidity. At the same time, the detection data can be analyzed and predicted, and the purchase and Various indicators such as storage and transportation are managed to improve the standardization, standardization and modernization of grain depots and the economic benefits of grain depots, thereby effectively guaranteeing the safety of grain depots.

The modern grain depot system needs to make full use of modern computer technology to efficiently and reliably manage all kinds of information in the grain depot, and realize the automation and intelligence of the management of the national grain depot, so that decision makers can understand the grain situation of the depot accurately at any time. , Business data can be easily shared between business departments.

2. Program highlights

Optimize management

Through KingSCADA, you can connect the control system data collected by the real-time database and the alarm data stored in the relational database, and integrate all aspects of the sub-systems, different departments, different workshops, and different positions into a unified application platform to ensure enterprise-level operation and Optimization of operations.

online test

It has the functions of detecting temperature, humidity, other indicators and the status of controlled equipment; it has the functions of regular patrol and real-time detection, and can be displayed according to the warehouse. The advantage is that the displayed graphics correspond to the actual location, so that if a sensor temperature alarm is displayed, It can quickly know its actual position; it has the function of displaying the data of the selected bin, and inspects each bin, but the display result is only the selected bin, which can be changed by clicking with the mouse [7].

Grain situation analysis

It has the function of automatically analyzing and judging the grain storage status, marking the abnormal position and value of the grain condition; having the function of comparing the grain condition of different dates and different warehouses; having the function of predicting the changing trend of the grain condition; data storage and retrieval; having the grain condition data storage 、Historical data query and network sharing function; with the function of displaying grain data tables and graphs; with the printing function of grain data tables and graphs.

Automatic alarm

It has the function of manually setting the temperature and humidity alarm limit and over-limit alarm; it has the automatic alarm function for analyzing according to the technical requirements of LS/T 1211 and LS/T 1202.

intelligent control

It has the function of real-time control of system controlled equipment according to the technical requirements of LS/T 1211 and LS/T 1202 and the corresponding analysis results.

3. system architecture

Since the granary collection and monitoring points are distributed among the granaries, the central monitoring system needs to aggregate information in real time for processing and monitoring. The monitoring content includes real-time display of equipment data, storage of historical data, and queries. When the data is abnormal, the upper PC computer display automatically pops up an alarm window, and fills in the relevant data into the alarm database to query historical alarm records and analyze historical data [4]. Through the VPN mode, the remote information collection point uses the internal interface mode of the Yakong software itself to transmit the data in real time to the historical database of the real-time monitoring software KingSCADA of the upper computer of the monitoring center to store a large amount of historical data. In addition, the relational data of the grain depot is stored in the SQL database through KingSCADA. The monitoring center performs data display curves, reports and other functional modules on the basis of a real-time database, and has the data function of remotely controlling various information collection points. At the same time, each information point and monitoring center can perform Web publishing.

The data collection remote monitoring system is designed to transmit the real-time data of various remote equipments to the system monitoring center through the wired network. The monitoring center displays the data of the collection points, and realizes client access and Internet publishing. The data collection remote monitoring system is divided into a two-level distributed system, the computer monitoring system of the field monitoring center is the first level, and the computer monitoring system of the monitoring center is the second level. The computer monitoring system of the monitoring center is responsible for calculating and processing the real-time data of various equipment collected from major remote information sites through KingSCADA, and displaying it to system managers and customers. The computer monitoring system of the field monitoring center realizes the monitoring of various equipment at the field level.

If the field layer does not use a computer monitoring system, the field data can be directly transmitted to the monitoring center through the collection and forwarding equipment, and then collected by the real-time monitoring server and stored in KingSCADA.

3.1 Master Control Center

The structure of the master control center solution consists of the master control center real-time monitoring software KingSCADA, WEB publishing service, C/S mode client and B/S mode client.

The real-time monitoring server mainly completes the receiving and forwarding of field data. The real-time monitoring server completes the following functions:

Receive data collected through IOServer, use TCP/IP to transmit and store it in the KingSCADA real-time database and historical database;

Receive the device control data sent (using TCP/IP), send it to the device in UDP/TCP or SMS mode, and control the designated device;

The system can be configured with multiple real-time monitoring servers as required.

WEB publishing service has Internet publishing function, B/S mode client, with up to 300 clients logging in to the system, concurrent clients can store and retrieve real-time and historical data at the same time. 200 client concurrent clients can retrieve real-time and historical data up to 20,000 pieces of data per second at the same time. Users can understand the operation information of various equipment through IE, including the operation status of a single unit and the system.

3.2 On-site monitoring

The field layer adopts the upper computer monitoring system, using KingView6.55 and KingHMI6.5 of Asia Control Company for monitoring, and the field layer adopts the upper computer monitoring system, which can directly use related equipment (such as serial port to network port switch equipment) through LAN/VPN Direct collection and transmission of data.

3.3 System structure

As shown in the figure, the system structure adopts a common three-layer network architecture, namely the data collection layer, data storage and processing layer, and data display and release layer.