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System background
The safe storage of food is a strategic matter related to the national economy and people’s livelihood, and scientific food preservation has important social significance and economic value. During grain storage, due to changes in the environment, climate, and ventilation conditions, the temperature or humidity in the granary will be abnormal, which can easily cause the grain to rot or cause pests. At the same time, the quality of grain storage in the granary is also affected by factors such as gas, microorganisms and pests in the granary. In the traditional granary monitoring system, the granary and the monitoring center mostly use RS-485 and other wired data communication methods, which makes the system have poor anti-interference, many connections, and difficulty in expansion; when a node has a problem, it will affect the entire system, which is not conducive to Monitoring and management of the granary.
To this end, our company has launched a “Warehouse Grain Supervision System” solution based on 2.4G long-distance radio frequency technology.
System Brief
The warehouse grain supervision system mainly completes the functions of collecting, storing and transmitting data to the monitoring center and executing the instructions of the monitoring center for parameters such as temperature, humidity and gas concentration of the food.
1. System components
Electronic tags inserted into the grain: 2.4G long-distance ML-T220 radio frequency card produced by Mulan Electronics. The ML-M220 radio frequency card is a temperature and humidity electronic label. This label is equipped with a temperature and humidity sensor. It collects the temperature and humidity in the warehouse into the label. Generally inserted directly into the grain.
The label installed in the warehouse: made by the ML-T80 radio frequency card produced by Mulan Electronics. Install according to the space of the warehouse.
Card reader: It is produced by Mulan Electronics, and its interface has RS232/RS485 interface.Installed in the warehouse
Grain monitoring system: Put the computer in a small room next to the warehouse.
2. System flow chart
3. Working principle
Insert the temperature electronic label into the grain in the warehouse, and also to the outside of the grain, that is, some card readers are installed in the warehouse, and the information of the warehouse grain condition collected by the label, such as grain temperature, warehouse temperature and humidity, relative humidity, and grain moisture, is collected. After arriving, the information is sent out continuously, and the card reader installed nearby can receive the information, and then transmit the received information to the system center, and the system center will issue corresponding commands according to the specific situation. So as to realize automated management.
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