UC知道找高人把下面一段话翻译成英文！
来源：百度知道 编辑：UC知道 时间：2024/06/26 02:00:47
实际应用系统中，主机和从机(节点)之间的多级通信以双工或全双工方式工作，一般均以差分平衡信号方式进行数据通信，其信号在传输的速率、传输的距离以及线路可带节点数之间有一定制约关系，再加上分散控制单元数量较多，分布较远，现场存在各种干扰，所以通信的可靠性不高，使得实际工程应用中如何保障RS485总线的通信的可靠性成为各研发机构的一块心病。若信号传输距离或线路上节点数超过芯片额定参数时，如何保证信号在线路上的准确传输是通信系统十分重要的任务。在线路上加中继器以及对信号进行整行、驱动，完成线路扩展的可行方法。
本设计分为硬件设计和软件设计两个部分。电路设计的基本思路为：一个MAX485收发器从数据总线上接收数据转化为TTL电平，采用单片机串口监视总线上的数据，通过查表当数据送给本中继器下的终端时才开启数据传输通道。本设计采用了华邦公司的W77E58芯片控制，数据接受和发送用的是MAX485，将RS485信号转变为TTL电平,信号全部用光耦隔离。软件部分用的是KEIL C51，通过对计数器初值设计实现波特率的自适应。
不要机器翻译的，要高手。
In the industrial computer control and management of applications as the main indicator of industrial automation technology in the past two decades have been making considerable progress. In the application system, RS485 half-duplex asynchronous communication bus is being widely used in various R & D institutions of the data communications bus, it is often used in centralized control hub and decentralized control unit between.
Practical applications, and from the host machine (nodes) between the multi-level communications to duplex or full-duplex mode, are generally balanced differential signal approach to data communications, its signal transmission rate, transmission distance and Lines which can carry a certain number of nodes between the constraints, coupled with the high number of decentralized control unit, the distribution of more distant, the existence of various kinds of interference at the scene, so the reliability of communication is not high, making practical applic