US 12,188,903 B2
Boom monitoring method and system, and engineering machinery, and machine-readable storage medium
Ling Fu, Changsha (CN); Lingjuan She, Changsha (CN); Yanbin Liu, Changsha (CN); and Li Yin, Changsha (CN)
Assigned to ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY CO., LTD., Changsha (CN)
Appl. No. 17/911,379
Filed by ZOOMLION HEAVY INDUSTRY SCIENCE AND TECHNOLOGY CO., LTD., Changsha (CN)
PCT Filed Jul. 8, 2020, PCT No. PCT/CN2020/100875
§ 371(c)(1), (2) Date Sep. 13, 2022,
PCT Pub. No. WO2021/232555, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 202010438466.5 (CN), filed on May 22, 2020.
Prior Publication US 2023/0096788 A1, Mar. 30, 2023
Int. Cl. G01N 29/04 (2006.01); G01N 21/95 (2006.01)
CPC G01N 29/043 (2013.01) [G01N 21/9515 (2013.01); G01N 2291/0234 (2013.01); G01N 2291/0289 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A boom monitoring method, wherein the method is applied to a monitoring mechanism, and the method comprises:
during operation of the boom, obtaining a boom damage signal monitored by a piezoelectric sensing network formed by a plurality of piezoelectric sensors arranged at different monitoring points on a boom;
determining a damage position of the boom and a corresponding first boom damage value according to the boom damage signal;
obtaining, when the first boom damage value reaches a preset starting value of an optical fiber sensing network formed by a plurality of optical fiber sensors arranged at different monitoring points on the boom, optical wave values of the corresponding monitoring points monitored by the optical fibers sensors; and
determining a boom crack signal according to the optical wave values, and calculating a second boom damage value according to the boom crack signal, wherein the boom crack signal comprises a crack change factor and a crack length.