Research Progress on Safety of Multifunctional Orchard Operating Platform

Multifunctional orchard operating platform is mainly used for picking fresh fruits such as pears and apples that are prone to damage skin due to collisions.It also has functions of carrying platforms such as fruit transportation，branch pruning，and thinning of flowers and fruits.This machine can significantly improve work efficiency of fruit farmers and reduce labor intensity.In recent years，with popularization and application of light and simplified management technology for orchards in our country，multifunctional orchard operation platform equipment has developed rapidly.Because operation on platform belongs to semi-altitude and high-altitude operations，its safety has attracted much attention.Existing research was elaborated in four aspects：pass ability of multifunctional orchard operating platform，lifting mechanism，automatic leveling technology and anti-rollover research.Advantages and disadvantages of crawler and wheeled walking devices and their applications in specific types of orchards at home and abroad were introduced.Application scenarios of cylinder type，scissor type，crank arm type and chain drive lifting mechanism and lifting mechanism most suitable for orchard operations were described.Research progress of automatic leveling technology and leveling accuracy in its application in orchard were reviewed.And brief description of rollover evaluation index and use of the index for rollover warning and active side prevention control methods were also introduced.Finally，it was pointed out that future multifunctional orchard operation platform would develop towards integration of agricultural machinery and agronomy，navigation technology and intelligent manipulator，and multi-technology integration，which would promote safety of multifunctional orchard operation platform.