METHOD OF MONITORING AN ELEVATOR CAR IN AN ELEVATOR SHAFT AND SAFETY SYSTEM FOR MONITORING AN ELEVATOR CAR IN AN ELEVATOR SHAFT

Abstract

A method of monitoring an elevator car in an elevator shaft is described. The method includes acquiring position data indicative of a position of the elevator car, acquiring motion data indicative of a motion of the elevator car, and determining, from a dynamical system model, an estimated position of the elevator car. The dynamical system model describes a motion of the elevator car based on input variables. The input variables include the position data and the motion data. The method further includes determining an offset value indicative of a motion data offset, wherein the offset value is generated such that the dynamical system model fits the position of the elevator car indicated by the position data, determining a sensor reliability parameter based on the offset value, and providing output data comprising the sensor reliability parameter.

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