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US 7,721,852 B2Granted
Control device of elevator
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsTakuya Ishioka, Tatsuo Matsuoka
Life of this patent
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Abstract
In an elevator control apparatus, the presence/absence of an abnormality in an elevator is monitored by an abnormality monitoring portion. The abnormality monitoring portion makes a determination on the presence/absence of an abnormality in the elevator based on information from a sensor, and outputs a signal for stopping a car upon detecting an abnormality. The history of information on the result of determination by the abnormality monitoring portion is recorded in a history information recording portion.
Claims11
An elevator control apparatus, comprising:
- an abnormality monitoring portion that determines whether there exists an abnormality in an elevator based on information from a sensor, and outputs a signal for stopping a car upon detecting the abnormality;
- a history information recording portion that records a history of information concerning the determination by the abnormality monitoring portion;
- and
- a soundness diagnosing portion that performs an automatic diagnosis on soundness of the abnormality monitoring portion, the history information recording portion recording a result of the diagnosis by the soundness diagnosing portion,
- wherein:
- the abnormality monitoring portion is a speed monitoring portion that performs a comparison between a detected speed of the car and a set value, sets the set value according to a position of the car, and outputs the signal for stopping the car depending on a result of the comparison;
- and
- the soundness diagnosing portion checks a computing result of the set value with respect to the car position for the diagnosis on the operation of the speed monitoring portion.
5 more elements
A method, comprising:
- detecting a speed of an elevator car using a sensor;
- detecting an acceleration of the elevator car;
- determining whether there exists an abnormality of the elevator car;
- and
- outputting a signal for stopping the elevator car upon detecting the abnormality;
- braking the elevator car using the signal for stopping the elevator car;
- recording a history of information the abnormality;
- and
- performing an automatic diagnosis on a soundness of a device which determines whether there exists an abnormality of the elevator car, and recording a result of the automatic diagnosis,
- wherein:
- the automatic diagnosis performs a comparison between a detected speed of the elevator car and a set value, sets the set value according to a position of the car, and outputs the signal for stopping the elevator car depending on a result of the comparison;
- and
- the automatic diagnosis checks a computing result of the set value with respect to the car position for a diagnosis of speed monitoring.
10 more elements
Dependencies are inferred from the claim text.