| 摘要 |
Signal processing and diagnostic routines (19) of elevator controllers (9-12) count the total number of runs to landings (O-F) of elevators (4-7) along with the number of runs to landings at which a value of a parameter of an elevator door condition or event is notable, (e.g., too high or too low). If any particular parameter is notable at more than one landing, and the ratio of (a) number of runs to landing at which said particular parameter is notable to (b) the total number of runs to landings exceeds a predetermined threshold, the problem is registered as a car door problem; otherwise, the problem is registered as a landing door problem at each landing where the value of the particular parameter is notable.
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