WHEEL-RAIL VERTICAL FORCE CONTINUOUS MEASURING METHOD AND DEVICE BASED ON RAIL STRAIN

摘要

A wheel-rail vertical force continuous measuring method based on rail strain comprises the following steps: one section of the rail above a single sleeper is selected as an elastomer for measuring wheel-rail vertical force; two groups of appropriate strain outputs on a neutral axis of the elastomer are selected, slopes of all straight lines which are corresponding to different longitudinal action point positions of a induction region of the elastomer and determined by the strain outputs under two sleeper support reference states are obtained on the same vertical force strain output plane; the strain output of wheels passing through the induction region of the elastomer is measured, the longitudinal positions of the action points of the vertical force are identified, negative values which are corresponding to the slopes obtained are taken as combination factors, the combined strain output is obtained by combining the selected two groups of strain outputs, and the combined strain output is unrelated with the sleeper support state; and the vertical force is obtained by the combined strain output of the effective measuring region. A measuring device comprises an elastomer selecting unit (71), a strain selecting and parameter obtaining unit (72), a longitudinal position identifying and strain combining unit (73) and an output unit (74) which are connected.