Elevator compensation assembly monitor
AssigneeOtis Elevator Company
InventorsYisug Kwon, Randy Roberts
Life of this patent
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Abstract
An illustrative example embodiment of an elevator compensation assembly includes a tie down mechanism and at least one compensation sheave that has an outer surface configured to engage at least one compensation rope member. At least one damper is associated with the tie down mechanism for resisting movement of the tie down mechanism in at least one direction. At least one detector detects movement of the tie down mechanism along the direction and provides an output indicating at least one characteristic of the detected movement.
Claims17
An elevator compensation assembly, comprising:
- a tie down mechanism including at least one compensation sheave having an outer surface configured to engage at least one compensation rope member;
- at least one damper associated with the tie down mechanism for resisting movement of the tie down mechanism in at least one direction;
- and
- at least one detector that detects movement of the tie down mechanism along the at least one direction and provides an output indicating at least one characteristic of the detected movement,
- wherein
- the at least one detector comprises an accelerometer that provides an indication of acceleration of the tie down mechanism during the detected movement, and
- the output indicates at least an amplitude of the acceleration.
An elevator compensation assembly, comprising:
- a tie down mechanism including at least one compensation sheave having an outer surface configured to engage at least one compensation rope member;
- at least one damper associated with the tie down mechanism for resisting movement of the tie down mechanism in at least one direction;
- and
- at least one detector that detects movement of the tie down mechanism along the at least one direction and provides an output indicating at least one characteristic of the detected movement, wherein
- the at least one damper comprises two hydraulic cylinders,
- the at least one detector comprises two detectors,
- one of the detectors is associated with each of the hydraulic cylinders, and
- the outputs of the detectors collectively indicate a symmetry between the hydraulic cylinders.
An elevator compensation assembly, comprising:
- a tie down mechanism including at least one compensation sheave having an outer surface configured to engage at least one compensation rope member;
- at least one damper associated with the tie down mechanism for resisting movement of the tie down mechanism in at least one direction;
- and
- at least one detector that detects movement of the tie down mechanism along the at least one direction and provides an output indicating at least one characteristic of the detected movement, wherein
- the at least one damper comprises a hydraulic fluid within a cylinder, and
- the output indicates whether gas is present within the cylinder.
A method of monitoring an elevator compensation assembly that includes a tie down mechanism having at least one compensation sheave and at least one damper associated with the tie down mechanism for resisting movement of the tie down mechanism in at least one direction, the method comprising:
- detecting movement of the tie down mechanism along the direction using at least one detector associated with the tie down mechanism,
- determining if the detected movement satisfies a first criterion, and
- determining if the detected movement satisfies a second criterion that comprises a trend in the detected movement over time;
- and
- generating an output indicating at least one characteristic of the detected movement, wherein the output includes an indication based on the detected movement satisfying the first criterion and an indication of a potential future need for maintenance when the detected movement satisfies the second criterion.
A method of monitoring an elevator compensation assembly that includes a tie down mechanism having at least one compensation sheave and at least one damper associated with the tie down mechanism for resisting movement of the tie down mechanism in at least one direction, the method comprising:
- detecting movement of the tie down mechanism along the direction using at least one detector associated with the tie down mechanism;
- determining if an amplitude of the detected movement exceeds a threshold amplitude;
- determining if a frequency of the detected movement exceeds a threshold frequency;
- and
- generating an output indicating at least one characteristic of the detected movement including an alert when the frequency of the detected movement exceeds the threshold frequency and an alert when the amplitude of the detected movement exceeds the threshold amplitude.
Dependencies are inferred from the claim text.