| The hot-reclaimed asphalt pavement maintenance vehicle is indispensable equipment used in the maintenance of high-grade asphalt pavement and municipal road. There are many domestic manufacturers of the maintenance vehicle, but the control system widely used is relay-contactor control system and the control level is low, the heating effect is not good and the energy consumption is large. This paper research on the control system of hot-reclaimed asphalt pavement maintenance vehicle, taking "Pursuing energy-saving, environmental protection and low cost on the premise of making sure the machine's operation quality and safety" as the design principle, combinating the theory with the practical engineering, then developed a set of PLC control system with perfect function, advanced technology, friendly human-machine interface, facilitate maintenance and management. This control system greatly improves the automatic level and energy-saving level of the hot-reclaimed asphalt pavement maintenance vehicle. The main research can be summarized as follows:1. Analysed the machine's control requirements and studied about different control system schemes and temperature control pattern in heating asphalt pavement and asphalt concrete and studied about energy-saving control, then determined the overall system scheme.2. Designed a S7-200 PLC control system combined with a touch-screen.Introduced the hardware design in detail and the selection of related equipments.3. Analysed the control process and write PLC program. Designed a friendly human-machine interface in order to realize the machine's real-time monitoring, data management and fault display.4. Researched on the application of some practical anti-interference techniques in this systemDuring the research, we got the general information, solved some key engineering problems during the hardware's application which can be used by the research of other hot-reclaimed asphalt pavement maintenance vehicle.
|
PDF Full Text Request