Flexible ultrasonic fatigue damage detection device and manufacturing method thereof

A fatigue damage detection device technology, applied in the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., can solve the problems of difficult hollow wheel axle fatigue damage detection, large size, etc.

Active Publication Date: 2020-08-07
TSINGHUA UNIV
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Problems solved by technology

However, at this stage, the cracks are mostly closed, and the scale is small, mostly on the nanometer and micrometer scales. In related technologies, acoustic sensors are used for material fatigue detection, but due to the large size and material limitations of acoustic sensors, it is difficult to detect hollow Axle achieves more accurate fatigue damage detection

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  • Flexible ultrasonic fatigue damage detection device and manufacturing method thereof
  • Flexible ultrasonic fatigue damage detection device and manufacturing method thereof
  • Flexible ultrasonic fatigue damage detection device and manufacturing method thereof

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Embodiment Construction

[0037] Various exemplary embodiments, features, and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. The same reference numbers in the figures indicate functionally identical or similar elements. While various aspects of the embodiments are shown in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.

[0038] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior or better than other embodiments.

[0039] In addition, in order to better illustrate the present disclosure, numerous specific details are given in the following specific implementation manners. It will be understood by those skilled in the art that the present disclosure may be practiced without some of the specific details. In some instances, methods, means, componen...

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Abstract

The invention relates to a flexible ultrasonic fatigue damage detection device and a manufacturing method thereof. The device comprises multiple pairs of detection parts, each pair of detection partscomprises a signal transmitting unit and a signal receiving unit which are adjacently arranged, and the multiple pairs of detection parts are adjacent and linearly arranged on a flexible substrate. The flexible substrate is used for being wound on a hollow wheel shaft, the signal transmitting unit is used for transmitting an ultrasonic detection signal under the control of a processing circuit, and the signal receiving unit is used for receiving a reflection signal of the ultrasonic detection signal. The processing circuit is further used for determining the signal change according to the ultrasonic detection signals and the reflection signals and determining the fatigue damage condition of the hollow wheel shaft according to the signal change. A packaging layer is located above the flexible substrate and covers the plurality of pairs of detection parts. According to the device and the manufacturing method thereof provided by the embodiment of the invention, the manufactured device issoft, light and thin, can be tightly attached to the surface of the hollow wheel shaft, and is high in precision, stability and reliability of the fatigue damage detection.

Description

technical field [0001] The present disclosure relates to the technical field of flexible electronics, in particular to a flexible ultrasonic fatigue damage detection device and a manufacturing method thereof. Background technique [0002] Hollow axles are crucial rotating parts in industrial equipment and are widely used in high-speed trains, wind power, machine tools and other equipment. The hollow axle works under high-speed rotation for a long time, and it is very easy to cause fatigue damage due to alternating periodic loads. The main experience of fatigue damage: early mechanical performance degradation (mainly dislocation damage) - initial micro cracks (micro crack initiation stage) - transition from micro cracks to macro cracks (accumulation of a large number of micro cracks) - macro crack growth - fracture and other five stage. There is a process of accumulating a large number of microcracks in the crack growth stage. Once this critical value is exceeded, the crack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
CPCG01N29/04
Inventor 冯雪吕文瀚马寅佶
Owner TSINGHUA UNIV
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