METHOD AND APPARATUS FOR ESTIMATING WEAR OF TROLLEY WIRE

WIPO Patent Application WO/2016/171048

A1

This apparatus for estimating wear of a trolley wire uses an estimation device (20) to estimate, from a measurement value sequence (10), both a wear rate and an estimation value proper as a transition of the remaining diameter, and outputs the value and the rate as an estimation result (30). The estimation device (20) is formed of: a remaining-diameter estimation unit (21) that estimates the remaining diameter by constructing and solving an optimization problem for minimizing an objective function T = Σ (present wear rate - previous wear rate)2 + αΣ (estimation value - lower limit value), under two constraint conditions of the wear rate being 0 or higher, and the estimation value of the remaining diameter being equal to or greater than the lower limit value obtained by subtracting an error vale ε from the estimation value of the remaining diameter; and a wear-rate estimation unit (22) that calculates the wear rate on the basis of the estimation value of the remaining diameter. Thus, a proper estimation value and a proper wear rate can be calculated even if a measurement value increases or decreases due to an error.

HAYASHI TAKANORI (JP)
NIWAKAWA MAKOTO (JP)
TABAYASHI SEIJI (JP)

PCT/JP2016/061855

October 27, 2016

April 13, 2016

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MEIDENSHA ELECTRIC MFG CO LTD (JP)

G01B21/00; B60M1/28

WO2011036728A1	2011-03-31
WO2014115902A1	2014-07-31

T.USUDA ET AL.: "Prediction of Contact Wire Wear in High-speed Railways", 9TH WORLD CONGRESS ON RAILWAY RESEARCH, 22 May 2011 (2011-05-22), XP055323791, Retrieved from the Internet [retrieved on 20160621]
See also references of EP 3287738A4

MITSUISHI, Toshiro et al. (JP)
Toshiro Mitsuishi (JP)

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