US 11,852,610 B2
Method for detecting tension force defect of steel cable
Donglai Zhang, Shenzhen (CN); Wei Gao, Shenzhen (CN); and Xueli Zhu, Shenzhen (CN)
Assigned to HARBIN INSTITUTE OF TECHNOLOGY, SHENZHEN, Shenzhen (CN)
Appl. No. 18/025,403
Filed by HARBIN INSTITUTE OF TECHNOLOGY, SHENZHEN, Shenzhen (CN)
PCT Filed Mar. 19, 2021, PCT No. PCT/CN2021/081787
§ 371(c)(1), (2) Date Mar. 9, 2023,
PCT Pub. No. WO2022/052440, PCT Pub. Date Mar. 17, 2022.
Claims priority of application No. 202010948050.8 (CN), filed on Sep. 10, 2020.
Prior Publication US 2023/0288377 A1, Sep. 14, 2023
Int. Cl. G01N 29/12 (2006.01); G01N 29/04 (2006.01)
CPC G01N 29/12 (2013.01) [G01N 29/048 (2013.01); G01N 2291/0234 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for detecting a tension force defect of a steel cable, comprising the following steps:
step S10: providing an excitation sensor on a first position of the steel cable to be detected and providing a detection sensor on a second position of the steel cable;
step S20: obtaining a value of a tension force on the steel cable and obtaining a first display diagram corresponding to the value of the tension force;
step S30: loading a white noise signal on the excitation sensor through a power amplifier;
step S40: acquiring a detection signal collected by the detection sensor within a first preset time period;
step S50: uploading the detection signal to a personal computer (PC) and performing a Fast Fourier Transform (FFT) process on the detection signal to generate a second display diagram showing a natural frequency spectrum and a direct guided wave amplitude;
step S60: determining whether there is a defect in the steel cable according to the first display diagram and the second display diagram, and if so, performing step S70;
step S70: determining a defect position of the steel cable.