METHOD FOR CORRECTING DYNAMIC DEFLECTION AMOUNT OF TROLLEY LINE

PROBLEM TO BE SOLVED: To obtain the amount of deflection with respect to a deflection reference line by providing a slant angle measuring device in an electric measuring vehicle, and correcting the dynamic deflection amount measured under the fluctuating state of a running body from the measured slant angle data and the height data obtained by a height measuring device for a trolley line. SOLUTION: A fluctuating body 41 is incline to the right by a slant angle θwith respect to a truck with a rotary center as the center. Therefore, a measuring reference line K is inclined to the right side of a deflection reference line C'. The slant angle θis measured by measuring vertical intervals (a) and (b) between an axle 422 and a floor surface 411 at two places, making the interval between both distance sensors (d) and using the expression θ=arctan [(a-b)/d]. A value h1 is found by the dimension of the structure of an electric measuring vehicle 4'. The height of a trolley line 1 over the ground is measured with a height measuring device. Therefore, a correcting amount Δx for the dynamic deflection amount D' is obtained by Δx=(H-h1 )tan θ. When the value is substituted into D=D'-Δx, the dynamic deflection amount D' is corrected, and the deflection amount D can be obtained.