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Device and method for self-seeking positron liquid to locate inner cavity and surface defects of parts

A technology of positrons and parts, which is applied in the field of defect positioning devices for self-seeking positron liquids to accurately image the inner cavity and surface of parts in 3D, achieving the effects of low imaging efficiency, short test time and high detection accuracy

Active Publication Date: 2018-07-20
深圳航宇光子检测技术有限公司
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Problems solved by technology

[0004] Purpose of the invention: Aiming at the above-mentioned prior art, a device and method for self-seeking positron liquid to locate inner cavity and surface defects of parts are proposed to realize 3D imaging of complex inner cavity and surface spatial geometry of parts to realize inner wall and surface defects of parts. Detection and localization of surface defects

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  • Device and method for self-seeking positron liquid to locate inner cavity and surface defects of parts
  • Device and method for self-seeking positron liquid to locate inner cavity and surface defects of parts

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Embodiment Construction

[0021] The present invention will be further explained below in conjunction with the accompanying drawings.

[0022] A device and method for self-seeking positron liquid to locate inner cavity and surface defects of a part, the device includes a rigid airtight container, a vacuum pump, a positron perfusion system, and gamma photon detection and imaging equipment. The positron perfusion system includes radionuclide activity meters, pipelines, positron liquid reservoirs, and closed waste tanks. Inside the rigid airtight container is a liftable support frame for placing the parts to be tested. The top of the rigid airtight container is provided with a positron liquid injection port and a vacuum port, and the bottom of the rigid airtight container is provided with a positron liquid discharge port.

[0023] Such as figure 1 As shown, the positron liquid reservoir is provided with a liquid level gauge, and the liquid outlet of the positron liquid reservoir is connected to the main ...

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Abstract

The invention provides an apparatus for positioning inner cavity and surface defects of a part through a self-finding positron liquid, and a method thereof. The inner wall and surface detects of the part are detected and positioned on the basis of a positron annihilation principle and the characteristics of first boiling and then freezing of the liquid in a vacuum pumping process, and positron generation and part complex inner cavity and surface space geometry 3D imaging of radionuclide in the positron liquid in the decaying process without influences of the temperature, the existence state and other factors.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a defect location device and method for 3D precise imaging of the inner cavity and surface of a part by a self-seeking positron liquid. Background technique [0002] As early as 1928, British physicist Dirac P A M predicted that electrons have anti-electrons when studying the quantum theory of electrons. In 1932, American physicist Anderson CD discovered the existence of positrons in the cloud chamber photos of cosmic rays, marking the existence of human beings. Start working on positrons. There are currently two methods of positron generation, one is through cyclotrons or reactors, using nuclear reactions to generate neutron-deficient radioactive sources, such as 22 Na, 64 Cu, 58 Co, 18 F. The other is to use the PIPA (Induced Positron) method, using a linear accelerator with an energy of tens of MeV to generate high-energy γ-rays, which are directly injecte...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/2251
Inventor 肖辉赵敏
Owner 深圳航宇光子检测技术有限公司
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