The latest information shows that China Railway Construction Heavy Industry Group Co., Ltd. (hereinafter referred to as "Railway Construction Heavy Industry") submitted a patent application in March 2024, aiming to solve the problem of inaccurate impact load measurement of the spindle bearing of the tunnel boring machine in actual operations. . The patent, with the publication number CN202410365043.3, focuses on "main bearing impact load signal filtering methods, devices, equipment and storage media" and was disclosed in early July 2024.

Details of the patent reveal that the R&D team of China Railway Construction Heavy Industry has proposed a set of integrated signal processing strategies aimed at improving the measurement accuracy of spindle bearing impact loads. This strategy cleverly combines low-pass filter, notch filter and Kalman filter algorithm. Through multi-layer filtering processing, it effectively eliminates the noise interference signal captured by the right-angle strain rosette sensor in the non-working state, and then fine-tunes the Kalman filter. Filter parameters. During the operation of the tunnel boring machine, the first impact load signal collected in real time by the right-angle strain rosette sensor is purified by the above-mentioned customized filtering process and converted into a more accurate and reliable second impact load signal, which significantly improves the accuracy of measurement.

The launch of this patent marks that China Railway Construction Heavy Industry has made a substantial breakthrough in the field of tunnel boring machine spindle bearing monitoring technology, providing the industry with more efficient and accurate solutions, effectively overcoming the difficulty in obtaining accurate information in complex operating environments in the past. Challenges with spindle bearing shock load data.