Requirements for wood drying control systems
The requirement of the wood drying control system is to meet the control purpose to the greatest extent, and it should have the following characteristics:
(1) Accuracy. The most basic requirement for the control system is that the moisture content of the wood after drying must meet the national standards or user requirements, which firstly depends on whether the selection of drying equipment meets the requirements of wood drying and the correctness of the wood drying process, but the accuracy of the control system It is also a necessary condition to meet the drying requirements.
(2) Stability. In the control process, fluctuations beyond the error range are not allowed, such as the temperature and moderateness required by the drying benchmark when the wood is dried to a certain stage. If the fluctuation is too large, the drying quality of the wood will be seriously affected.
(3) The response speed indicates that it takes a short time to restore the parameters in the drying process to the state set by the drying reference as soon as possible, thereby reducing the drying quality of the wood caused by temperature or humidity fluctuations. negative impact.
(4) Reliability. It mainly means that during the long-term operation of wood drying equipment, there should be no major performance degradation or component failure, and the control system error or failure is not allowed to be too large, such as the measurement of wood moisture content during the wood drying process, especially for dry In the middle and late stages, if the measurement error is too large, the wood drying defects will increase, resulting in waste of energy and wood.
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