Patent ID: 6484125
Filing Date: 2002-11-19
Classification: B66B

Abstract:
A method of monitoring and processing operating parameters of an elevator having a car, comprising:(a) determining, from elevator operational parameters, the occurrence of events or conditions which constitute notable features of various types having significance with respect to elevator performance, and in response to each occurrence of any of said notable features, providing a corresponding feature signal, said notable features including specific notable features indicative of elevator operational events which could be caused either by elevator operational conditions or by passenger activity, (b) in response to each said feature signal, storing a corresponding manifestation of said notable feature in a chronological log to provide related stored feature manifestations including stored specific feature manifestations, (c) dividing said stored feature manifestations into groups of proximate feature manifestations which may be related to a common causation; during a non-operational learning phase (d) determining from said stored specific feature manifestations, the mean of the number of said manifestations in each of a plurality of said proximate groups and storing a corresponding first mean manifestation in response thereto for each of said groups; (e) determining the range of said numbers in said groups and storing a range manifestation indicative thereof; (f) providing the standard deviation of said numbers as a function of said range manifestation and storing a standard deviation manifestation indicative thereof; during a phase of ordinary elevator operation subsequent to said learning phase (g) continuously performing said steps (a)-(c) and determining from said stored feature manifestations the number of said manifestations in each of said proximate groups; (h) providing, in response to the relationship between each said number determined in said step (g) and said mean and standard deviation manifestations, a manifestation indicative of the likelihood of passenger interference being the cause of said occurrences of notable operational features.