METHOD FOR DETERMINING THE POSITION OF REFLECTED PULSE Russian patent published in 2020 - IPC G01R31/11 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement equipment and can be used in power engineering, where location methods for determining range to object are used to determine distance to damages on power transmission lines. In the method of determining the position of a reflected pulse, consisting in multiple probing of a power transmission line with single electromagnetic pulses, receiving and recording a signal reflected by a power transmission line, which is a reflectogram from points Vi, where index i lies in range from 0 to N, according to invention multiple search intervals are set inside reflectograms, which consist of points Vj, where index j lies in range from B≥0 to C≤N, where B is initial index of search interval, C is a search interval ending index, for each search interval, an array of points of a reference reflected pulse En, the shape of which is determined by the expected shape of the reflected pulse, where the index n lies in range from 0 to M, is given inside each array of points of the reference pulse En is given an index z0 of the center of the reference pulse, which is the center of the expected shape of the reflected pulse, reducing the correlation function away from the true position of the reflected pulse, for which on both sides of the maximum value of the correlation function protective intervals are added, at which the correlation function must fall, an array of points of the correlation coefficient Rq is calculated, among all Rq the maximum value Rqmax is determined, with the value of the index q=qmax, the center of the reflected pulse in the given search interval Vj is determined, inside the first protective interval in the array of correlation coefficients Rq with indices from (qmax-z0) to (qmax-z0+z1) the maximum value Rq1max is determined with the value of index q1=q1max, inside the second protective interval in the array of correlation coefficients Rq with indices from (qmax-z0+z2) to (qmax-z0+M), the maximum value Rq2max is determined with the value of the index q2=q2max, for each search interval Vj, the coefficients W1 and W2, which determine how many times correlation coefficients Rq1max, Rq2max aside from center 4 of pulse 5 should be less than correlation coefficient Rqmax in pulse center, when observing conditions (Rqmax/Rq1max)>W1 and (Rqmax/Rq2max)>W2, a certain center of the reflected pulse in the given search interval Vj is considered to be valid, otherwise the determined center of the reflected pulse is rejected as unreliable.

EFFECT: high accuracy and reliability of determining the position of the reflected pulse in location methods, as well as adding a criterion for false detection of the reflected signal.

1 cl, 1 dwg