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1. System Overview As a storage place of tobacco leaf, tobacco leaf warehouse must maintain a relatively constant temperature and humidity environment. Because the storage capacity is generally relatively large and the internal temperature and humidity fields are relatively complex, it is necessary to design a complete temperature and humidity control system.
The "hair-sucking action" of tobacco leaves is very strong. In a high-temperature and high-humidity environment, excessive moisture is easily absorbed. When the ambient temperature and humidity are reduced, excess moisture is released and condensed on the surface into water. In this way, suitable conditions are provided for the propagation of various microorganisms, which tends to result in large-scale discoloration, deterioration, burn, mildew, and gall of tobacco. Therefore, by controlling the temperature and humidity of the tobacco leaf storage environment, provide suitable environmental conditions for the storage of tobacco leaves, to avoid mildew caused by excessive humidity, or to cause economic losses due to excessive moisture and excessive temperature caused by dry crushing; at the same time suitable conditions It is beneficial to improve the quality of natural alcoholization and improve the intrinsic quality of finished products, which will be beneficial to enhancing the market competitiveness of cigarettes.
In response to the above technical requirements, Jin Lishi designed the system by referring to “YC0006-1992 tobacco leaf storage and storage methodâ€. The system uses domestic brands of temperature and humidity sensors to systematically develop a “temperature and humidity automatic monitoring system for tobacco leaf bank and production processâ€. The system is based on the principle of advanced technology, economical and practical, stable and reliable, and good expansibility. It has fully utilized the latest achievements in computer technology, network technology, and bus intelligent instrumentation technology. The system software can run stably under the current popular Windows XP and other graphical operating systems. It has full Chinese language display, multi-tasking, multi-window and data acquisition, real-time monitoring, historical curve display, trend analysis within a period, and alarm processing. And can provide advanced operation and management support system, which can effectively control the temperature and humidity environment of tobacco leaf warehouse, prevent the change of tobacco leaf and dryness, and improve the alcohol quality of tobacco leaf. The staff can monitor the entire temperature and humidity of the entire warehouse in the central control room, and can print the temperature and humidity data and trend graphs of each layer inside and outside the warehouse at any time or at any time. The system can also achieve network management through LAN or WEB network. Senior managers on the network can browse the data reports through remote viewing methods, keep abreast of management dynamics, and realize automated and comprehensive monitoring and management.
2 System Components 2.1 System Diagram 
System overview
The connection of equipment in each building Figure 2.2 System Description The entire system is composed of three parts, the on-site temperature and humidity real-time monitoring system, data acquisition system, and central monitoring and management workstation, which can realize the internal and external environment temperature and humidity inside the library and the inside of the library. Cigarette bag temperature and humidity data collection, remote monitoring and corresponding information management functions. The data collection process is as follows:
(1) Measure the on-site environment through the wireless temperature and humidity sensor and send out the measured data regularly;
(2) Each signal receiver collects the data measured by the sensors in each layer, converts the data into standard network communication methods (3), forwards the data in the building to the monitoring room through optical fiber (4), and the industrial computer in the monitoring room passes The network exchanges data with the on-site signal receivers, obtains the temperature and humidity data of the site (5), and installs special monitoring software for Jin Lishi on industrial computers.
A. The configuration software is responsible for collecting data, analyzing data, storing data, etc. It can be queried according to time or by shift group. It can automatically generate data report by setting and print output through the printer;
B. And through the edited interface and function, with the external 51-inch LCD TV, large-screen display;
C. In the software can set the alarm value, when the data exceeds the limit, the automatic alarm output, can be ordinary sound and light alarm, you can also set the alarm by automatically sending mobile SMS;
D. In the surveillance room, if the router is dialed up and then accessed through the internal settings of the software, the router can open the current data monitoring interface for viewing by using the browser.
(6) In order to ensure the stability of system operation, we use two industrial computers to back up each other (redundant) work modes to ensure that when one industrial computer is damaged, another one can timely handle the recording of field data;
Note: This program requires Party A to provide dial-up Internet access conditions and mobile SIM card, and the costs involved and future maintenance must be borne by Party A.
3 System Reference Screen (1) Overview Screen
(2) Shift report, data statistics interface
(3) Data Summary Interface
Note: The above monitoring interface is a schematic diagram. The actual screen is based on the final software.
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