Elevator car position determining system and method using a signal filling technique
AssigneeOtis Elevator Company
InventorVlad Zaharia
Life of this patent
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Abstract
A method for determining a position of a moving object, such as an elevator car in an elevator shaft, includes the steps of mounting a leading sensor and a lagging sensor to the moving object and spacing the leading sensor from the lagging sensor by an offset distance, mounting a plurality of spaced apart position indicators along a pathway of the moving object, transmitting signals representative of object position from the leading sensor and the lagging sensor to a controller as the sensors pass the spaced apart position indicators, and filling any gaps in the signal gathered from one of the sensors by using a correction factor established from the position sensed by the other sensor and the offset distance. A system for performing the method is described.
Claims17
A method for determining a position of a moving object comprising the steps of:
- mounting a leading sensor and a lagging sensor to said moving object and spacing said leading sensor from said lagging sensor by an offset distance;
- mounting a plurality of spaced apart position indicators along a pathway of said moving object;
- transmitting signals representative of object position from said leading sensor and said lagging sensor to a controller as said sensors pass said spaced apart position indicators;
- and
- filling any gaps in said signal gathered from one of said sensors by using a correction factor established from said position sensed by said other sensor and said offset distance.
A method for determining a position of a moving object comprising the steps of:
- mounting a leading sensor and a lagging sensor to said moving object and spacing said leading sensor from said lagging sensor by an offset distance;
- mounting a plurality of spaced apart position indicators along a pathway of said moving object;
- transmitting signals representative of object position from said leading sensor and said lagging sensor to a controller as said sensors pass said spaced apart position indicators;
- filling any gaps in said signal gathered from one of said sensors by using a correction factor established from said position sensed by said other sensor and said offset distance;
- and
- using said object position representative signal from said leading sensor and a speed signal derived from said leading sensor object position representative signal for performing NTSD and using said object position representative signal from said lagging sensor and a speed signal derived from said lagging sensor object position representative signal for performing ETSD.
A position determination system for a moving object comprising:
- a leading sensor and a lagging sensor mounted to said moving object, said leading sensor being spaced from said lagging sensor by an offset distance;
- a plurality of spaced apart position indicators along a pathway of said moving object;
- means for receiving signals representative of a position of said moving object from said leading sensor and said lagging sensor as said sensors pass said spaced apart position indicators;
- and
- means for filling any gaps in said signal gathered from one of said sensors by using a correction factor established from said position detected from said other sensor and said offset distance.
A position determination system for a moving object comprising:
- a leading sensor and a lagging sensor mounted to said moving object, said leading sensor being spaced from said lagging sensor by an offset distance;
- a plurality of spaced apart position indicators along a pathway of said moving object;
- means for receiving signals representative of a position of said moving object from said leading sensor and said lagging sensor as said sensors pass said spaced apart position indicators;
- means for filling any gaps in said signal gathered from one of said sensors by using a correction factor established from said position detected from said other sensor and said offset distance;
- said indicators comprising a plurality of spaced apart smart vanes mounted at spaced apart landings;
- and
- said signal gathering means comprising means for using the signal from said lagging sensor as a primary position control signal and said filling means comprises means for determining car position based on PVT feedback when both of said sensors are not sensing one of said smart vanes.
Dependencies are inferred from the claim text.