Service estimation apparatus for elevator

Details Service estimation apparatus for elevator Service estimation apparatus for elevator

1985-12-05

1988-02-23

Krass, Errol A.

Boots, shoes, and leggings

187101, 187130, B66B 118, G06F 1520

Patent

active

047274999

ABSTRACT:
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.

REFERENCES:
patent: 4133039 (1979-01-01), Eichenlaub
patent: 4401192 (1983-08-01), Trosky et al.
patent: 4542463 (1985-09-01), Uetani
patent: 4567566 (1986-01-01), Araya et al.
patent: 4612624 (1986-09-01), Tsuji
patent: 4672531 (1987-06-01), Uetani
patent: 4677577 (1987-06-01), Takabe et al.

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