Large gantry cranes are the most common lifting and handling equipment used in industry and construction. They are often used for heavy lifting and moving tasks in industrial environments such as ports, construction sites, and manufacturing facilities. Gantry cranes are equipped with a lifting mechanism that can lift and lower heavy objects. The mechanism usually includes a crane or winch system, which may be electric, hydraulic, or powered by other means, depending on the crane design. It is characterized by its tall, rigid steel structure spanning an area, supported by legs or columns on either side.

Gantry cranes are widely used in various industries of the national economy such as metallurgy, electric power, ports, logistics, machinery manufacturing and marine engineering. They are important process equipment for industrial production and are related to the safety of people's lives and the safety of national economic operations. and social stability are important components of public security in all countries. The development momentum of my country's hoisting machinery industry is strong. As of the end of 2017, the number of hoisting machinery in my country reached 2.2375 million units. According to the "Notice of the State Administration for Market Regulation on the Safety Status of National Special Equipment in 2017", the accident rate and fatality rate of cranes in my country rank first among the eight categories of special equipment. Therefore, there is an urgent need for an effective means to ensure the safety of in-service cranes. Safe and reliable operation of machinery.