| 摘要 |
A device comprising a traveling chassis (1) equipped with two pickups (5 and 6) arranged opposite a line of rails (2) at a distance apart from each other (E1) which is dependent on the length of the wave of the deformation to be measured. The traveling chassis (1) is connected to a vehicle which travels over the track. The two pickups (5 and 6) are connected to an electronic measurement circuit comprising: a comparator (8) to form the difference of the two measurements effected ( DELTA 1=hA-hC) by these pickups, an apparatus (9) for determining the effective wavelength ( lambda 1E) of the deformation. a processing apparatus (10) adjusted to determine in true magnitude the trough (H1) of this deformation on basis of the difference established ( DELTA 1), the effective wavelength ( lambda 1E) determined, and the distance (E1) between sensors, a recording device comprising a data condenser (18) and a stylus-type recording tape (11). |
