Terahertz imaging device and method for nondestructive testing of cable

A technology of terahertz imaging and non-destructive testing, which is applied to measuring devices, instruments, scientific instruments, etc., can solve problems such as poor imaging effects, and achieve the effect of avoiding signal attenuation and expanding information dimensions

Pending Publication Date: 2022-07-12
国网河北省电力有限公司雄安新区供电公司 +2
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  • Abstract
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Problems solved by technology

[0007] In order to solve the problem of poor imaging effect of existing terahertz imaging technology in cable detection

Method used

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  • Terahertz imaging device and method for nondestructive testing of cable
  • Terahertz imaging device and method for nondestructive testing of cable
  • Terahertz imaging device and method for nondestructive testing of cable

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Embodiment 2

[0055] Based on the same inventive concept, the present invention also provides a terahertz imaging method for cable nondestructive testing, including:

[0056] The execution end of the manipulator moves the arc-shaped bracket connected to the execution end, and then drives the terahertz source 2 and the terahertz detector 3 located inside the arc-shaped bracket to move, so that the terahertz source 2 and the terahertz detector 3 move. The focal point formed by the intersection of the axes of the detector 3 coincides with the initial detection point on the cable 1 under test; the execution end moves according to the set motion trajectory and then drives the terahertz source 2 and the terahertz detector 3 to move to complete the pairing of the tested cable. Scan the cable 1 under test to obtain an internal three-dimensional tomographic image of the cable 1 under test.

[0057] Preferably, the method further includes:

[0058] The motion controller 6 connected to the robotic ar...

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Abstract

The invention discloses a terahertz imaging device for nondestructive testing of a cable. The terahertz imaging device comprises a terahertz source, a terahertz detector and an arc-shaped bracket, wherein the terahertz detector intersects with the axis of the terahertz source and is provided with a focal point; the arc-shaped bracket is mounted at the front end of a six-axis mechanical arm and is used for providing three-dimensional motion trail scanning; the terahertz source and the terahertz detector are both installed on the inner side of the arc-shaped support. And the circular point of the arc-shaped bracket coincides with the focal point, so that the initial detection point can be conveniently and accurately positioned. And the signal processing unit adopts a terahertz time-domain spectrometer. Accurate positioning and full-circumferential detection of a detection point on the surface of a detected cable are realized through an arc-shaped bracket arranged at the front end of a six-axis mechanical arm, and meanwhile, multiple scanning modes are adopted to adapt to the shape of the detected cable; signal attenuation, image contrast reduction and object contour distortion caused when a terahertz imaging symmetry axis does not coincide with a detection point normal are effectively avoided, and the beneficial effect of clear cable nondestructive detection imaging is achieved.

Description

technical field [0001] The invention relates to a terahertz imaging device, in particular to a terahertz imaging device and method for cable nondestructive testing. Background technique [0002] Insulated cables are widely used in various fields of social production and national life, and are indispensable electrical products especially in housing construction and infrastructure construction projects. Insulated cables are usually multi-layer structures, mainly including conductive cores (conductors), insulating layers and protective layers. The conductive wire core is usually made of metal copper or aluminum as the conductor material, and the cross-sectional shape can be circular, oval, fan-shaped, etc., to conduct current. The insulating layer is usually made of materials such as rubber, oil-impregnated paper, poly(chlorinated) vinyl, etc. Among them, each phase-separated insulation ensures the electrical insulation between the conductive wire cores, and the all-in-one in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3586G01N21/3563G01N21/01
CPCG01N21/3586G01N21/3563G01N21/01
Inventor 李志雷刘海峰池威威周莉梅尚宇炜解芳贾志辉张继超张圳刘洋洋曹庆泽王涛陈世洋王冠璎范闻博刘平安李英泽
Owner 国网河北省电力有限公司雄安新区供电公司
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