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All-optical integrated broadband ultrasonic detection device and preparation method

An ultrasonic detection, integrated technology, applied in the direction of measuring device, using sound wave/ultrasonic wave/infrasonic wave to analyze solids, using sound wave/ultrasonic wave/infrasonic wave to analyze materials, etc. It can solve the problem of reduced responsivity, small dynamic range, and limited use of space and other problems, to achieve the effect of simple preparation method, small dynamic range and easy realization

Active Publication Date: 2021-01-15
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of ultrasonic transducer generally has single receiving / transmitting (multiple transducers work independently), narrow excitation and receiving frequency bands (mostly single-frequency devices), and limited use space ( Responsivity decreases due to reduced volume), small dynamic range (less than 100dB), insufficient stability and reliability (susceptible to electromagnetic, magnetic field, etc. interference) and other essential deficiencies

Method used

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  • All-optical integrated broadband ultrasonic detection device and preparation method
  • All-optical integrated broadband ultrasonic detection device and preparation method
  • All-optical integrated broadband ultrasonic detection device and preparation method

Examples

Experimental program
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Effect test

preparation example Construction

[0034] The preparation method of the all-optical integrated broadband ultrasonic testing device is as follows:

[0035] S1. Using high-precision 3D printing technology to make the L-shaped housing 3, the material of the L-shaped housing 3 is engineering plastics (ABS, PC, nylon) or photosensitive resin (epoxy resin, resin somos11122 and 19120). The L-shaped housing includes a vertical section and a horizontal section. The vertical section is provided with a first through hole 4 along the vertical direction, and the horizontal section is provided with a second through hole 8 along the vertical direction: the diameter of the first through hole 4 is The second through hole 8 has a diameter of 2.6 mm and a length of 3-8 mm and is used for assembling a broadband ultrasonic receiving end. In order to improve the response sensitivity of the broadband ultrasonic receiving end, a circular resonant cavity 7 with a diameter of 10 mm and a thickness of 0.4 to 1 mm is arranged at the botto...

Embodiment 1

[0042] S1. The L-shaped casing 3 is manufactured by high-precision 3D printing technology, and the material of the L-shaped casing 3 is ABS plastic. In the L-shaped housing 3, a first through hole 4 and a second through hole 8 are respectively arranged in the vertical direction: the first through hole 4 has a diameter of 10mm and a length of 25mm, and is used for assembling a broadband ultrasonic excitation end; The hole 8 has a diameter of 2.6 mm and a length of 3 mm, and is used for assembling a broadband ultrasonic receiving end. In order to improve the response sensitivity of the broadband ultrasonic receiving end, a circular resonant cavity 7 with a diameter of 10 mm and a thickness of 0.4 mm is provided. The circular resonant cavity 7 is coaxial with the second through hole 8. Body 3 lower ends are flush.

[0043] S2. Select the high-power optical fiber 2 as the laser transmission fiber of the nanosecond pulse laser. The core diameter of the high-power optical fiber 2 i...

Embodiment 2

[0046] S1. The L-shaped casing 3 is manufactured by using high-precision 3D printing technology, and the material of the L-shaped casing 3 is epoxy resin. In the L-shaped housing 3, a first through hole 4 and a second through hole 8 are respectively arranged in the vertical direction: the first through hole 4 has a diameter of 10mm and a length of 35mm, and is used for assembling a broadband ultrasonic excitation end; The hole 8 has a diameter of 2.6 mm and a length of 8 mm, and is used for assembling a broadband ultrasonic receiving end. In order to improve the response sensitivity of the broadband ultrasonic receiving end, a circular resonant cavity 7 with a diameter of 10 mm and a thickness of 1 mm is provided. The circular resonant cavity 7 is coaxial with the second through hole 8. 3 lower ends flush.

[0047] Steps S2 and S3 are the same as in Embodiment 1.

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Abstract

The invention discloses an all-optical integrated broadband ultrasonic detection device and a preparation method. The all-optical integrated broadband ultrasonic detection device comprises an L-shapedshell, the L-shaped shell comprises a vertical section and a horizontal section, a first through hole is formed in the vertical section in the vertical direction, and a second through hole is formedin the horizontal section in the vertical direction;a circular resonant cavity is formed in the bottom of the second through hole and is coaxial with the second through hole; the lower end of the circular resonant cavity is flush with the lower end of the horizontal section and is bonded with a circular second copper foil; a high-power optical fiber is vertically arranged in the first through hole, and a circular first copper foil is bonded to the lower end of the first through hole; and an optical fiber ceramic ferrule jumper wire is vertically arranged in the second through hole. An opticalfiber is used for transmitting nanosecond pulse laser to irradiate the copper foil, an ultrasonic source is provided for ultrasonic detection of a rock physical model, and the copper foil and the endface of the optical fiber are used for constructing an optical interference structure and collecting ultrasonic echoes; and the two parts are stably combined through an optimally designed L-shaped integrated structure, so that the device has the characteristics of flexibility and portability.

Description

technical field [0001] The invention belongs to the technical field of rock physics model ultrasonic detection, and relates to an all-optical integrated broadband ultrasonic detection device and a preparation method. Background technique [0002] Our country is developing and transforming towards high-quality development and transformation in key areas such as energy resource development and infrastructure construction, especially the precise analysis and scientific research and judgment of key geophysical information is particularly urgent. The research on the physical and mechanical properties of rock mass belongs to the research frontier and hot spot in the fields of oil and gas exploration, microseismic monitoring, and rock mass engineering. The rock physics model is one of the main methods for rock physics research. The artificially prepared rock-like model is used to simulate the actual rock mass structure, so as to avoid the shortcomings of in-situ detection such as t...

Claims

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Application Information

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IPC IPC(8): G01N29/04
CPCG01N29/046
Inventor 邵志华乔学光刘昕阴欢欢
Owner NORTHWEST UNIV
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