Reproducibility and repeatability of the results of strain measurement control of the rolling surface of moving wagon wheels

The paper presents the results of tests of a system for monitoring the rolling surface of freight car wheelsets in motion using dynamic strain measurement. The research was carried out at a test ring under the conditions of multiple repetition of train load to evaluate the reproducibility of the results of strain measurements. During each passage of the train through the measuring section, a high-speed system with a sampling frequency of 64 kHz measured the strain of the rail neck caused by the impact of the wheels of the rolling stock. A specially developed software was used to automatically identify defective wheels from the obtained data and determine the dynamic force of wheel impact on the rail. The repeatability of strain measurement data was evaluated by comparing them with the results of visual and measuring control of the rolling stock conducted before the beginning of the tests.