Research on control strategy and system for preventing elevator car from colliding with the roof

Abstract Car top-collision accidents caused by mechanical or electrical failures in traction-driven elevators occur occasionally, often resulting in serious casualties. To avoid such safety accidents, this paper designs a car anti-top-collision system based on hydraulic guide rail braking devices, proposes a system design scheme, and carries out mechanical calculations, hydraulic system design, control circuit, and control program design. Finally, the system control program is verified using Cade_SIMU software. This system plays an important role in preventing car top-running accidents.