起重机械是现代化工业生产中必不可少的设备,它对减轻繁重的体力劳动、提高劳动生产率和实现生产过程的机械化、自动化具有重要的作用。由于起重机械作业过程具有吊物形式多样、载荷多变、运行范围大、活动空间广、工作环境比较复杂,以及作业中常常需要多人配合的特点,起重机械的危险性很大,易发生事故。随着人们生活质量的提高 Lifting machinery is an indispensable equipment in modern industrial production. It plays an important role in alleviating heavy manual labor, increasing labor productivity and mechanization and automation of the production process. Due to the heavy lifting load, varied operating range, wide range of activities, complex working environment and the multi-person cooperation often required in operation, the lifting machinery is very dangerous and easy to operate have an accident. With the improvement of people’s quality of life