但目前大多数粮库仍采用人工测温的方法，不仅增加了粮库工作人员的工作量，

But at present, most grain depots still use manual temperature measurement, which not only increases the workload of grain depot staff, but also lowers work efficiency. In particular, the temperature measurement of large grain depots cannot be completed in a timely and complete manner, resulting in frequent occurrence of large-scale adverse grain conditions. According to statistics, due to improper storage of grains, hundreds of millions of kilograms of grains go mouldy and deteriorate every year, causing immeasurable economic losses. It can be seen that the intelligent management of grain storage is very necessary, and it is also very necessary to design an economical and applicable grain storage control system. Using PLC to monitor, process and display temperature and humidity has the advantages of good real-time performance, low cost and high stability

However, at present, most grain depots still use the method of manual temperature measurement, which not only increases the workload of grain depot staff, but also has low work efficiency. In particular, the temperature measurement of large grain depots cannot be completed in time and completely, resulting in large-scale adverse grain conditions from time to time. According to statistics, due to improper grain storage, hundreds of millions of kilograms of grain are moldy and deteriorated every year, resulting in immeasurable economic losses. It can be seen that the intelligent management of grain storage is very necessary, and it is also very necessary to design an economic and applicable grain depot control system. Using PLC to monitor, process and display temperature and humidity has the advantages of good real-time performance, low cost and high stability

However, at present, most grain depots still adopt manual temperature measurement method, which not only increases the workload of grain depot staff, but also has low working efficiency. Especially, the temperature measurement in large grain depots can't be completed in time and completely, which leads to large-scale bad grain situation from time to time. According to statistics, due to improper storage of grain, hundreds of millions of kilograms of grain go moldy and deteriorate every year, causing immeasurable economic losses. Therefore, the intelligent management of grain storage is very necessary, and it is also necessary to design an economical and applicable grain depot control system. Using PLC to monitor, process and display the temperature and humidity has the advantages of good real-time, low cost and high stability.