Abstract
In order to intensively complete the automatic operation of logging, feeding, peeling, beating branches, making wood and so on, and satisfy the requirements of forest harvesting, the control system of forest harvesting needs to be studied urgently. The control system designed in this paper uses CAN bus, upper computer (IPC), lower computer (SPN-M*-18 controller), displayer, hand shank and diameter measuring encoder, length measuring encoder, etc. This paper introduces the system composition, hardware composition, software application, displayer design and cutting effect test. The application of CAN bus makes the communication between the host computer and the lower computer as well as other devices smooth, and the anti-interference ability is enhanced. Under the function of the controller, the operation of the equipment is realized, and the labor productivity is improved. The PID controller used in the program ensures the length of the wood in the automatic feeding process, so as to meet the project requirements. The design of the displayer screen makes the operation and maintenance of the operators easier and more convenient. After several experiments, the conclusion is reached that the control system meets the design requirements and can be used in production operations.
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