基于單片機(jī)控制的電梯控制器(外文翻譯)-文庫(kù)吧資料
2024-12-14 02:22本頁(yè)面
【正文】 plans 4 Summary and the experience Through the prehensive training based on MCU, let I learned the previous knowledge with prehensive application. This for me, is not only a practice, more is to test the knowledge of their previous. I found that I need to know, and learn a lot of knowledge. Let my own shortings were found from this practice, application software on a variety of learning at the same time, let me have a deeper understanding of knowledge. Found, only theoretical knowledge is not enough, there is a considerable gap between theory and application. Also let us experience what have grandiose aims but puny abilities, empty talk. Through this internship, I learned a lot of ② not learn things. This practice means to us is very important, let us from the new understanding to their position. In the practice, also carry forward our team spirit, and ability to cooperate. Under the teacher39。 Realtime display of elevator location and running state ( uplink / downlink )。 The elevator to scan the keyboard constantly in the process of operation, thus to judge each floor has no call request,。 The keyboard circuit as shown in figure 2: 4 Fig. 2 overall plans the smallest singlechip system design If the circuit group reset circuit and clock circuit two parts, wherein the reset circuit using a bination key manual reset and automatic poweron reset, the circuit in Figure 3 ( left) shows: 9 feet for the MCU reset. The clock circuit as shown in Figure 3 ( right) shows: crystal oscillator is used in 12MHZ, XATL2 and XATL1 were 18 and 19 feet of scm. Fig. 3 overall plans 5 display circuit design This circuit uses a 8 digital tube display, from 74ls245 to drive 8 digital tube display elevator to arrive the number of floors and the operational status of the elevator, wherein the digital tube of 6 feet ( DP ) bright said elevator at this point in the uplink, if not bright said elevator in the downlink. microcontroller P2 port as the output port and the output activelow. The circuit shown in figure 4: Fig. 4 overall plans motor positive inversion of control In this design in order to facilitate the motor positive and negative use two light tube to represent, as shown in Figure 5 : the use of SCM P0 port output port to drive the luminous tube, as is the P0 to add resistance, in which L1 light indicates the motor forward, L2 lights, L3 light indicates that the motor reverse motor stop, while the elevator door. L3 out that the elevator door, elevator running L1 and L2 must have a bright, to express elevator uplink and downlink Fig. 5 overall plans 6 system software design Because the design of the keyboard matrix to replace the outgoing select button, which is the direction of the elevator call button and choose according to these keys to decide, so the chip to scan the keyboard constantly to get the call state. In order to control the operation of the lift. The keyboard matrix scanning is an important part of the software design of the system, in addition to the storage key information of each layer to keyboard scan, and then pare
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