Method for increasing air-coupled ultrasonic detection signal strength of composite material

An air-coupling and ultrasonic testing technology, which is applied in the analysis of materials, the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, and the use of sound waves/ultrasonic waves/infrasonic waves for material analysis, etc., to improve engineering practicability and improve detection sensitivity.

Inactive Publication Date: 2017-08-22
SUZHOU PHASERISE TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Due to the physical characteristics of the air-coupled ultrasonic technology

Method used

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  • Method for increasing air-coupled ultrasonic detection signal strength of composite material
  • Method for increasing air-coupled ultrasonic detection signal strength of composite material
  • Method for increasing air-coupled ultrasonic detection signal strength of composite material

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Embodiment Construction

[0027] The present invention is described below in conjunction with accompanying drawing.

[0028] as attached figure 1 As shown, a method for increasing the air-coupled ultrasonic detection signal strength of a composite material according to the present invention comprises the following steps:

[0029] In the first step, the workpiece 3 is placed between the first air-coupled transducer 1 and the second air-coupled transducer 2;

[0030] In the second step, the film layer 4 is pasted on the upper and lower surfaces of the workpiece 3;

[0031] The third step is to excite the first air-coupled transducer 1, so that the ultrasonic waves emitted by it pass through the upper air, the upper film layer 4, the workpiece 3, the lower film layer 4 and the lower air in sequence, and reach the first Two air-coupled transducers 2;

[0032] In the fourth step, the signal received by the second air-coupled transducer 2 is fed back to the computer to generate images and data.

[0033] ...

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Abstract

The invention discloses a method for increasing air-coupled ultrasonic detection signal strength of a composite material. The method comprises the following steps: step one, placing a workpiece between a first air-coupled transducer and a second air-coupled transducer; step two, sticking two thin layers on the upper and the lower surfaces of the workpiece; step three, stimulating the first air-coupled transducer, enabling the ultrasonic waves emitted by the first air-coupled transducer to pass through upper side air, the upper side thin layer, the workpiece, and the lower side thin layer and lower side air in sequence, and reaching to the second air-coupled transducer; and step four, feeding back a signal received by the second air-coupled transducer to a computer and generating an image and data; the invention provides a method and technology for conducting impedance matching on the detected workpiece, so that ultrasonic waves reflected back and forth in the thin layers are kept in the same phase when transmitting the thin layers, so as to realize the enhanced energy transmission effect similar to the resonance and improve the detection sensitivity of a whole detection system, and thin layer materials can be recycled.

Description

technical field [0001] The invention relates to the technical field of ultrasonic detection, in particular to a method for increasing the strength of air-coupled ultrasonic detection signals of composite materials. Background technique [0002] The physical principle of air-coupled ultrasonic testing is similar to that of traditional piezoelectric ultrasonic, but traditional piezoelectric ultrasonic requires water or other viscous reagents as the coupling medium, while air-coupled ultrasonic does not require any coupling medium (or air as the coupling medium). And there is no requirement to detect the material properties of the workpiece. Air-coupled ultrasonic technology is mostly used for flaw detection and material property testing of multilayer composite materials, adhesive materials, lithium batteries, rubber materials, foam materials, and metal materials, and is widely used in component testing in aerospace, automotive, and shipbuilding industries. [0003] Since wate...

Claims

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Application Information

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IPC IPC(8): G01N29/09G01N29/28
CPCG01N29/09G01N29/28
Inventor 沈宇平朱绪祥
Owner SUZHOU PHASERISE TECH
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