Airborne ultrasound testing system for a test object

A test object and test system technology, applied in the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, use sound waves/ultrasonic waves/infrasonic waves for material analysis, and measurement devices, etc. Problems such as Dirac-like excitation signals

Active Publication Date: 2017-08-08
夏楼激光音响有限责任公司
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Problems solved by technology

Furthermore, the thermoacoustic generator used in combination with the membraneless optical microphone in the proposed setup does not exhibit the ringing effect typically exhibited by prior art test rigs (see also Fig. 2), but is able to Transmits a very short Dirac-like excitation signal within 1 microsecond

Method used

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  • Airborne ultrasound testing system for a test object
  • Airborne ultrasound testing system for a test object
  • Airborne ultrasound testing system for a test object

Examples

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Embodiment Construction

[0064] figure 1 Shown in is a typical inventive device. The onboard ultrasonic waves 5 are emitted from the thermoacoustic generator 1 a into the air or into another sound propagation medium (eg a specific gas 10 that may be present in the test environment). Such specific gases may include, for example, nitrogen or carbon dioxide or gas mixtures, for example, thorlabs Inc ( https: / / www.thorlabs.de ), which is favored due to the fact that the test object 3 will not be exposed to oxygen, which is also enhanced by the fact that the pressure-related change in the refractive index depends on the medium Sensitivity of diaphragmless and non-resonant optical microphones is preferred. The sound propagation medium can also be any liquid (eg, oil, water, blood or others); however, the efficiency of the thermoacoustic generator is more favorable when used in gas. As a result, the sound propagation medium will generally be ordinary ambient air. Sound waves are incident on the test ob...

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Abstract

The invention refers to an airborne ultrasound testing system for test object (3) containing an ultrasound generator (1,9), an ultrasound receiver (2), a controller for both and a computer assisted test result interface to display an image of a tested test object (3). The ultrasound generator (1) is a resonance-free thermo-acoustic ultrasound generator which does not rely on mechanically deformable or oscillating parts and the ultrasound receiver (2) is a membrane-free optical microphone in an air or gas coupled pulse-echo arrangement or in an air or gas coupled transmission mode arrangement. With this testing system, it is possible to test objects with high precision and without liquids or disturbing ringing effects.

Description

technical field [0001] The present disclosure relates to the field of ultrasonic testing. Background technique [0002] current development status [0003] In this section, numbers within [ ] refer to prior art references recorded at the end of Section II. [0004] Non-destructive testing (NDT) methods of determining the mechanical integrity of components without introducing damage have been of great importance in various branches of industry for many years. For various purposes (e.g., comprehensive quality control in manufacturing, inspection in use, or defect assessment and monitoring in use), it is not beneficial to sacrifice test objects in the process ([1]). This inspection is especially critical in the marine, aerospace, automotive industry or construction, where material damage can endanger human safety. [0005] In these branches of industry, the need for robust, durable lightweight structures has gradually promoted the use of fiber reinforced composite (FRC) mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/12
CPCG01N29/12G01N29/221G01N29/223G01N29/2418G01N29/2456G01N29/262G01N29/32G01N2291/0231G01N2291/102
Inventor 巴尔萨泽·费希尔
Owner 夏楼激光音响有限责任公司
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