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US 10,472,208 B2Granted
Method of eliminating a jerk arising by accelerating an elevator car
AssigneeKone Corporation
InventorsAri Kattainen, Kenneth Kronkvist, Giovanni Hawkins
Life of this patent
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Abstract
The invention concerns the automatically detection and analysis of jerks arising when an elevator car starts its ride carrying out a determination of an elevator run sequence by an elevator controller, measuring an elevator car movement with a sensor at a predetermined phase of the elevator run sequence, and determining an elevator car sway from the sensor data, further comparing the determination result with a pre-set criteria, and being followed by outputting the comparison result.
Claims13
A method of eliminating a start kick jerk of an elevator car, the method comprising:
- determining whether the elevator car is in one of a brake opening phase and an acceleration phase of a plurality of phases of an elevator run sequence of the elevator car, the plurality of phases of the elevator run sequence having corresponding states in one or more state machines, the brake opening phase being a phase in which a microcontroller opens brakes associated with a hoisting machine and the acceleration phase being a phase in which a velocity of the elevator car increases after the brakes associated with the hoisting machine are open such that the brake opening phase and the acceleration phase define a start kick of the elevator car, the determining whether the elevator car is in one of the brake opening phase and the acceleration phase including setting a state of the one or more state machines by,
- measuring movement of the elevator car via one or more of a motor encoder mounted on a rotating axis of the hoisting machine, a linear position sensor configured to read stationary position references mounted in the elevator shaft and an accelerometer associated with the elevator car,
- analysing the movement of the elevator car to determine whether the elevator car is in one of the brake opening phase and the acceleration phase, and
- setting the state of the one or more state machines based on a result of the analysing;
- measuring, via one or more of a vibration sensor and a sound sensor, vibrations associated with the movement of the elevator car;
- filtering, via the one or more state machines, the vibrations associated with the movement of the elevator car such that the one or more state machines automatically disregard the vibrations associated with other ones of the plurality of phases of the elevator sequence excluding the brake opening phase and acceleration phase to generate sensor data associated with the kick start;
- determining an amount of sway of the elevator car from the sensor data associated with the start kick;
- determining whether the amount of sway is within limits set by criteria;
- outputting an indication of whether the amount of sway is within the limits;
- and
- correcting control parameters associated with the hoisting machine such that the amount of sway is within the limits.
8 more elements
A non-transitory computer readable medium having stored therein, a computer program that, when executed, configures a processor to,
- determine whether an elevator car is in one of a brake opening phase and an acceleration phase of a plurality of phases of an elevator run sequence of the elevator car, the plurality of phases of the elevator run sequence having corresponding states in one or more state machines, the brake opening phase being a phase in which a microcontroller opens brakes associated with a hoisting machine and the acceleration phase being a phase in which a velocity of the elevator car increases after the brakes associated with the hoisting machine are open such that the brake opening phase and the acceleration phase define a start kick of the elevator car, the processor configured to determine whether the elevator car is in one of the brake opening phase and the acceleration phase by setting a state of the one or more state machines by,
- measuring movement of the elevator car via one or more of a motor encoder mounted on a rotating axis of the hoisting machine, a linear position sensor configured to read stationary position references mounted in the elevator shaft and an accelerometer associated with the elevator car,
- analysing the movement of the elevator car to determine whether the elevator car is in one of the brake opening phase and the acceleration phase, and
- setting the state of the one or more state machines based on a result of the analysing,
- measure, via one or more of a vibration sensor and a sound sensor, vibrations associated with the movement of the elevator car,
- filtering, via the one or more state machines, the vibrations associated with the movement of the elevator car such that the one or more state machines automatically disregard the vibrations associated with other ones of the plurality of phases of the elevator sequence excluding the brake opening phase and acceleration phase to generate sensor data associated with the kick start,
- determine an amount of sway of the elevator car from the sensor data associated with the start kick,
- determine whether the amount of sway is within limits set by criteria,
- output an indication of whether the amount of sway is within the limits,
- correct control parameters associated with the hoisting machine such that the amount of sway is within the limits.
7 more elements
Dependencies are inferred from the claim text.