文档介绍：摘要
起重机是一种蕴含多种危险因素的设备,操作不当或超载,容易引起翻车、折臂等无法挽回的后果,因此对于16吨以上的起重机要求安装一种保护设备,一般称为力矩限制器。
起重机力矩限制器是装备在起重机上的重要超载保护装置,它为起重机的安全工作提供了保障。本文在参考现有力矩限制器的基础上,充分利用单片机技术、传感器技术等一些技术成果,来实现起重机的超载力矩限制,努力确保不会出现因超载而造成意外事故。本系统具有精度高,通用性好,抗干扰能力强,功能多,比较低的建设成本以及系统的可扩展性能强等优点。
本文所述的起重机力矩限制器的主控单元是以单片机AT89C52为核心部件,A/D转换器采用ADC0809,对从各传感器采集到的数据进行变换,然后送至AT89C52进行数据的、判断,做出各种控制动作;显示、输入单元选用了MAX7219芯片作为显示和输入控制;复位监测芯片采用X5045来实现开门狗定时器、电源监测等。
关键词:力矩限制器;超载保护;AT89C52;单片机;汽车起重机
Abstract
Crane moment limiter that is equipped on the crane is an important overload protective device .It provides safeguard for the safety work of crane .This paper is based on the efficient experience learnt through parison and analysis of the present domestic and foreign moment limiter .In this paper ,the anther proposes the idea of separating the main control unit of system and the display unit ,which can enhance generation and function ,greatly reduce building and maintenance costs ,increase the precision of control and boost up expansibility of system.
MCU AT89S52 is used as a ponent in the main control unit of system .It samples signals from the sensors, calculates, judges and executes the corresponding control action. In the display unit, the author chooses AT89S52 an the controller. Liquid Crystal Display, which can provide both interaction between people and machines and a large amount of information, is applied, so that parameters of the working conditions of crane can be displayed one is supported by munication protocol that is developed by the author.
The adjusting and running of the system indicates that the whole design is feasible and reliable, and the presumed functions have been conducted essfully.
Keywords: crane; moment limiter; overload protect; date transmission; communication portico
目录
1 绪论………………………………………………………………………1
概述……………………………………………………………………1
力矩限制器技术概况以及发展趋势…………………………………2
课程的主要工作………………………………………………………3
解决方案的选择………………………………………………………4
工业控制计算机解决方案………………………………………4
单片机