Development Of Comprehensive Performances Tester For Escalator

With the rapid development of public transport,escalators have become an indispensable means of transportation in people's daily life.The failure of comb plate safety switch,asynchronous operation of handrail and step,excessive acceleration and deceleration of step,and braking failure of escalator usually lead to serious safety accidents.Therefore,the key to ensure the safe operation of escalators is to detect the escalator on time.The inspection of comb plate safety protection device and operation quality of escalator are important items in factory inspection,installation inspection,supervision inspection and periodic inspection.Based on STM32 embedded high-speed microcontroller,a high-precision,portable and easy-to-operate tester is developed for escalator comb plate safety switch and operation quality detection.The tester mainly includes trigger module,displacement detection module,operation quality detection module,embedded micro-control system module and computer management module.According to the two triggering modes of comb plate,trigger module and displacement detection module are designed to measure the force and displacement of the comb plate,so as to quantitatively evaluate the security of the protection of the comb plate.In order to quantitatively evaluate the operation quality of escalators,operation quality detection module is designed for the synchronous speed,starting acceleration and stopping distance of the escalators and handrails,which is used to collect the displacement,speed and acceleration of escalators and handrails.The STM32 microprocessor is used in the control system of the tester.Signal acquisition circuit is designed for the force and displacement sensors.LCD display interface and SD memory card interface are also designed.According to EMC theory,the anti-jamming optimization design of hardware is carried out.The complete software for the detector is compiled,and the interference noise in acquisition signal is processed by software anti-interference.Solidworks Simulation is used to simulate and verify the mechanical strength of the structure of the tester.Finally,a prototype of the comprehensive tester is made,and the loading experiment is carried out.The related accuracy of the tester is tested and calibrated.The results show that the tester developed in this paper satisfies the testing of comb plate safety protection device and operation quality.It can guarantee the safe operation of escalator/automatic sidewalk,and is suitable for the use of elevator manufacturers,elevator installation and maintenance units,special equipment inspection and testing institutes and elevator quality supervision and inspection institutions.