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A Fast Scanning Laser Doppler Vibration Measurement System

A technology of laser Doppler and vibration measurement, which is applied to measuring devices, measuring ultrasonic/sonic/infrasonic waves, instruments, etc., to achieve the effects of reducing complexity, avoiding failure, and enhancing portability and applicability

Inactive Publication Date: 2018-09-25
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the research on real-time online non-destructive testing of composite materials based on fast scanning laser Doppler vibration measurement technology is still a research blank.

Method used

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  • A Fast Scanning Laser Doppler Vibration Measurement System

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Embodiment Construction

[0015] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0016] The invention relates to a fast scanning laser Doppler vibration measurement system, such as figure 1 As shown, it includes laser Doppler vibration measurement unit I and probe light tracking and scanning control unit II. Fiber laser 1, coherent detection optical link 2, first telescope 3, balance detector 4, data acquisition card 5 and orthogonal differential frequency discrimination module 6 constitute the laser Doppl...

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Abstract

The invention relates to a quick-scanning laser Doppler vibration measurement system comprising a laser Doppler vibration measurement unit and a detected light tracking and scanning control unit. The laser Doppler vibration measurement unit is composed of a fiber laser, a coherent detection optical link, a first telescope, a balance detector, a data acquisition card and an orthogonal differential discriminator module. The detected light tracking and scanning control unit is composed of a lighting laser, a lens group, a galvanometer, a second telescope, a position sensor and a displacement controller. The quick-scanning laser Doppler vibration measurement system is applicable to quick detection of large-surface composite materials and products thereof. The efficiency of nondestructive detection is improved. The applicability of the system is enhanced.

Description

technical field [0001] The invention relates to the technical field of composite material detection, in particular to a fast-scanning laser Doppler vibration measurement system. Background technique [0002] The high corrosion resistance and excellent strength and elastic properties of composite materials make it widely used in the manufacture of aerospace vehicles and related components. Aircraft manufacturing companies such as Boeing and Airbus have continuously increased the use of composite materials in their aircraft manufacturing, and the materials of fuselage, wings, engine blades and other components have gradually expanded from metal materials to composite materials. In the preparation and in-service work of composite materials, accurate and effective non-destructive testing of composite materials is the basis and premise of material performance evaluation and material structure repair, and is also a key means to ensure the successful launch and safe operation of ae...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H9/00
CPCG01H9/00
Inventor 尚建华贺岩程小劲刘玉英
Owner DONGHUA UNIV
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