METHOD OF DETERMINING POSITION OF CENTRES OF SLEEPERS OF RAIL TRACK Russian patent published in 2024 - IPC E01B35/06 B61K9/08 

FIELD: physics; transportation.

SUBSTANCE: invention relates to means of providing information-measuring systems used in railway machines with a contactless reading device for determining the position of sleepers. In the method for determining the position of the centres of railroad sleepers, a sliding window of size N=2n is used to record the moments of passage of the beginning and end of the sleeper, where n is a natural number. At that, at each moment of time i covered with window range readings sample d_i is divided into two sub-samples d_1i and d_2i of equal length n, for each subsample, mean-square deviations of range measurements are estimated σ_1i and σ_2i and calculating two indicators Ind_1_i=σ_1i/σ_2i and Ind_2_i=σ_2i/σ_1i. Further, the time coordinates of the points of local extrema i_extr_₁ and i_extr_₂ of the indicators Ind_1_i and Ind_2_i, which have exceeded the detection threshold of Z_thr, are estimated, and the time of passage of the centre of the sleeper is determined using the formula t_sc=0.5(i_{extr_1} + i_{extr_2} – N). Track coordinates of the sleeper centre are estimated from the information from the distance measuring device when recording the track travelled by the machine s(t).

EFFECT: higher probability of correct detection of sleeper centres irrespective of unknown average height of crushed stone on railway track.

1 cl, 7 dwg