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US 4,727,499 AGranted
Service estimation apparatus for elevator
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorShintaro Tsuji
Life of this patent
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AssigneeMitsubishi Denki Kabushiki Kaisha
InventorShintaro Tsuji
Estimating the term…
A service estimation apparatus for an elevator adopting an estimated index with which service by the elevator can be estimated in any building and under any traffic state comprising a measurement apparatus to measure periods of service time and a microprocessor operating under program control to calculate a mean value and a variance of the periods of service time to set a reference value for designating a range of the periods of service time and to determine the estimated index, namely, an upper limit presumption value based on the mean value, the variance, and the reference value, and to determine an unachieved rate of service reference corresponding to the upper limit presumption value, the unachieved rate of service reference being a probability value at which the elevator periods of service time fall outside the range designated by the reference value.
A service estimation apparatus for controlling elevators using an estimated index which represents quality of service comprising means to measure periods of service time by an elevator for passengers using the elevator and to calculate a mean value and a variance of the periods of service times, means to set a reference value for designating a range of the periods of service time, means to determine an upper limit presumption value based on the mean value, the variance, and the reference value, and to deliver the upper limit value as the estimated index, means to determine an unachieved rate of service reference corresponding to the upper limit presumption value which is a probability value at which the periods of service time of the elevator fall outside the range designated by the reference value, and means to deliver an estimated result for elevator service based upon the estimated index.
Dependencies are inferred from the claim text.