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Beam crack fault detection apparatus and apparatus based on frequency sweep frequency sweep excitation vibration

A technology for fault detection and vibration excitation, which is used in measuring devices, testing of mechanical components, testing of machine/structural components, etc. It can solve problems such as low crack sensitivity, high requirements for theoretical analysis and operating skills, and achieve broad engineering applications. Prospects, the effect of the realization process is simple and easy

Inactive Publication Date: 2015-11-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing dynamic excitation crack detection technology requires high theoretical analysis and operation skills, and usually has low sensitivity to cracks, and proposes a beam crack detection technology based on sweep frequency excitation vibration Fault detection device and method

Method used

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  • Beam crack fault detection apparatus and apparatus based on frequency sweep frequency sweep excitation vibration
  • Beam crack fault detection apparatus and apparatus based on frequency sweep frequency sweep excitation vibration
  • Beam crack fault detection apparatus and apparatus based on frequency sweep frequency sweep excitation vibration

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Embodiment Construction

[0032] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0033] The invention provides a beam crack fault detection device based on sweep frequency excitation vibration, such as figure 1 As shown, it includes a signal acquisition unit, a frequency sweep signal generator, an exciter, and a computer digital signal acquisition and analysis unit, and the frequency sweep signal generator, an oscillator, a signal acquisition unit, and a computer digital signal acquisition and analysis unit are connected in sequence.

[0034] Among them, the frequency sweep signal generator is used to generate the sine frequency sweep excitation, and the vibrator is used to realize the excitation process. The frequency sweep signal generator is connected to the vibrator through a high-power cable to realize the sinusoidal frequency sweep excitation to the beam structure.

[0035] The signal acquisition unit is connected with the com...

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Abstract

The invention discloses a beam crack fault detection apparatus and apparatus based on frequency sweep frequency sweep excitation vibration. By use of a vibration signal excitation and data acquisition system, given sine frequency sweep excitation is applied to a beam structure, and according to the frequency change of the frequency sweep excitation, innovative re-sampling, filtering and statistical analyzing are carried out on beam vibration signals so that fault diagnosis and fault degree classification carried out on different-degree cracks of a simply supported girder are realized.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis and prediction of mechanical equipment, and in particular relates to the design of a beam crack fault detection device and method based on sweep frequency excitation vibration. Background technique [0002] In recent years, the health monitoring of mechanical structures has attracted more and more attention, especially the proposal of Industry 4.0 and 2025 Made in China, which put forward higher requirements for the health management of mechanical equipment operation status, and adopt simple and effective methods to realize the The assessment of the health status of the machine has become an important research topic in the health management of mechanical equipment. [0003] Fatigue cracks are common faults in mechanical structures, and tiny cracks are difficult to detect and detect. Potential crack propagation will have catastrophic consequences, and effective detection and classification...

Claims

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Application Information

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IPC IPC(8): G01M13/00G01N29/04
Inventor 王科盛张冕罗大双韦东冬
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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