Method for determination of moisture in grain:
The interdependence level or occurrence level of grain moisture and stored grain humidity in the stored grain ecosystem plays a very important role in the succession of the entire stored grain biome. When the grain moisture is low, the life activities of grain and microorganisms are inhibited, and the safe storage of grain can be guaranteed at this time. However, once the grain moisture is increased to an appropriate level, the microbes lose their natural control factors and will quickly develop, seriously causing grain mildew.
Although it is impossible to completely avoid the activities of insects and mites in the dry environment determined by low-moisture grains, some species cannot survive because they are not suitable for dry conditions and their physiological balance is destroyed. Even if the population can survive, due to "shortage of water", the reproduction will be reduced, the population will be difficult to develop, and the entire system will be in an extremely unstable state. Any form of water increase or humidification may cause outbreaks of harmful organisms in a short period of time. Strict control of grain moisture changes is one of the important measures for safe grain storage. The change of grain moisture during storage is closely related to safe storage. Grain moisture can directly reflect the safety and stability of grain. Therefore, the moisture of grain must be tested during storage. According to the current research and application status, the hygrometer is the main component to realize the electronic and automatic detection of grain moisture in the real warehouse, but the existing hygrometer has a small range of humidity measurement, serious hysteresis, poor linearity, and slow response. , It is obviously affected by the ambient humidity, and the detection error is large, especially when the moisture is low, the measurement accuracy is even worse. Therefore, the detection of grain moisture in real warehouses has not yet been electronically and automatically automated. However, due to the limited number of humidity sensors required for online detection, components with higher precision and price, such as integrated circuits, can be selected to solve the problem. Now the online detection of grain moisture has been preliminarily realized. At present, the moisture detection during grain storage in the warehouse mainly takes grain samples at fixed points in the warehouse according to the regulations, and then measures them with instruments in the laboratory; the detection of grain moisture at the purchase site often uses fast moisture analyzers or sensory detection; The more advanced grain moisture online detection technology is adopted in warehouse and related operations.
