Cable force vibration detection method and its detecting apparatus

Abstract

The invention discloses a detecting method for tension vibration, and a detecting device thereof, relating to the technical field of cable tension detection. The detecting method for the tension vibration of the invention comprises the following steps: step one, a sensor is arranged on the cable of a cable bridge to collect data; step two, the collected data in the step one is treated with FFT analysis; step three, the FFT analysis in the step two is treated with long cable judgment, if the result is judged to be long cable, the computation of the cable force of the long cable is carried out, and the result is stored in a memory; if the result is judged not to be long cable, then the next step is executed; and step four, the FFT analysis in the step two is treated with short cable judgment, if the result is judged to be short cable, the computation of the cable force of the short cable is carried out, and the result is stored in the memory, if the result is judged not to be short cable, then the first step is executed for collecting the data again. The detecting method and the detecting device of the invention realize the aims of good detection effect and wide application range, and is not limited by use conditions, simple structure, and low power consumption.

Description

technical field [0001] The invention relates to the technical field of cable tension detection. Background technique [0002] Cable bridge has become an important form of contemporary bridge construction because of its simple structure, large span, good aerodynamic stability, portability, and beautiful appearance. In the past 40 years, more than 300 large cable-stayed bridges have been built in the world, and more than 30 such bridges have been built in China. [0003] Cable is an important part and main load-bearing component of this type of bridge. The tension measurement of old and new cables has become the main basis for evaluating its reliability and load-bearing state. Therefore, the research on cable force detection technology and detection system has attracted great attention in related fields. It has great practical value and national economic significance. [0004] Traditional cable force testing methods mainly include oil pressure gauge method, force sensor meth...

AI Technical Summary

Problems solved by technology

In the actual measurement of this method, due to the limitations of modern sensing and detection technology, it is difficult to accurately measure the fundamental frequency, so that it is often impossible to measure; another type of method is the "frequency difference method", which is based on the adjacent The principle that the difference between two dominant frequencies is equal to the fundamental frequency, using the difference between two adjacent dominant frequencies to indirectly identify the fundamental frequency, and then obtain the tension of the cable through the relationship between the tension of the string and the fundamental frequency

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