Of particular importance are the backup systems and the risk assessments implemented in order to provide the necessary safety assurance and ensure safe operation in the case of system failure. This paper describes the design, implementation and testing of an electrically based intelligent braking system applied to a public service escalator that significantly reduces the risk of passenger falls and meets the requirements of the standard. ![]() Public service escalators carry larger numbers of passengers and are thus at a higher risk of passenger falls and especially avalanche falls. The motivation for this clause is to reduce the risk of passenger falls. ![]() Moreover, the new revision of the European escalator standard, EN115:2008 stipulates that the maximum value of deceleration measured in the direction of travel must be less than 1 m/s2. The consequence of this is the high risk of passenger falls under light load stopping conditions, with consequential injury. This leads to large variations in stopping distance, but more importantly, it causes a severe stop under light loading conditions. Most escalators employ conventional open-loop braking systems that apply the same braking force regardless of the load on the escalator and the direction of travel. The braking system of an escalator is the most important safety device, as all other safety devices rely on it to bring the escalator to a complete standstill. The lifecycle of such a management process is discussed in detail considering each stage in the cycle. Design features that prevent/mitigate each hazard are also discussed.Įscalator management of passenger accidents is crucial to preventing them. These are discussed with examples given on each type of hazard. The most important hazards on escalators are: Falls on escalators, falls from escalators, entrapments and crushing inside escalators. This is based on historical data gathered from observation of passenger behaviour. Risky passenger behaviour on escalators is discussed in relation to contributing to passenger accidents. Any accident is caused by one or more of the factors above, and understanding this is crucial to eliminating accidents. The interaction between these three elements is discussed as well as the prevention of accidents by manipulating them. It comprises Design, Passenger Behaviour and Management. The proposed passenger accident triangular model is presented. On-site training was carried out for the maintenance staff.Ī general overview is given of passenger safety and accidents on escalators, and how they relate to engineering design, passenger behaviour and overall management (including operation, maintenance, inspection and education). In the fourth and last test, a training manual was developed for the testing and adjusting the braking systems. They were adjusted in accordance with the outputs of the theoretical model. In the third step, all the remaining 28 escalators (out of the full fleet of 32 escalators) were tested and adjusted without the use of weights. The model allowed the operator to understand the range of acceptable deceleration values that indicate compliant operational brakes. ![]() In the second step, the data from the weight tests was used to build a theoretical mathematical model in MS Excel for the different types of escalators. The first step was to gather escalator type test data on the four escalator models on the Metro. This paper describes the work carried out by the author in setting up a weightless brake testing system for testing the escalator brakes at the Tyne & Wear Metro in the United Kingdom. For this reason, a model for weightless brake testing system has been developed for testing the escalator brakes. Carrying out this test using weights is a very complex, risky and expensive procedure, and thus cannot be carried out regularly. It is thus necessary to ensure that brakes are tested at regular intervals in order to ensure passenger safety. The escalator braking system is the most important safety components.
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