Patent ID: 11897524
Assignee: BEIJING ORIENTAL RAILWAY TECHNOLOGY DEVELOPMENT CO., LTD.
Field: Measurement (Instruments)
Classification: CPC B  G | IPC B  G

Claim 8:
9. A method for detecting overload and unbalanced load on a railway, the method comprising the following steps:
providing two sampling points at a rail web of each steel rail between every two adjacent rail sleepers at two sides, respectively, symmetrically disposing sampling points on one side about the steel rail with respect to sampling points on a second-side, disposing the sampling points at each side on a neutral axis of the steel rail, fixing a fiber-optic sensitive element configured for continuously measuring a load when a train passes through the two sampling points at each of the sampling points obliquely relative to the neutral axis of the steel rail in a plane where a side of the steel rail is located, and disposing two fiber-optic sensitive elements on a same side of each steel rail at an angle of 90° respect to each other in a plane where the side of the steel rail is located; wherein the two sampling points at each side are configured to be equidistant from a center of spacing between the two adjacent rail sleepers, and an effective data collecting section is formed between the two sampling points at each side;
collecting force acting on the two sampling points on a same side by the fiber-optic sensitive elements to obtain shear-stress waveforms when the train passes through the two sampling points on the same side, and synthesizing two shear-stress waveforms to form an approximately square effective data collecting section having peak values of the two shear-stress waveforms as end points; and obtaining a sum of signal output from the two fiber-optic sensitive elements disposed at the two sampling points on the same side when the train passes through the approximately square effective data collecting section at a high speed to reflect the load of the train and an influence of vibration of the train on the load when the train is dynamically passing through;
continuously providing a plurality of the approximately square effective data collecting sections between a plurality of the rail sleepers so as to obtain the load of the train and a complete waveform of the vibration of the train when the train is dynamically running; and analyzing and processing the data to accurately obtain an overload and unbalanced load detecting data; and
displaying and storing the overload and unbalanced load detection data.