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Camera bag used for distinguishing film exposure and distinguishing method thereof

A technology of dark bag and film, applied in the field of radiographic inspection, can solve the problems of differentiation verification, waste of film, waste of working hours, etc., and achieve the effect of simple production and low cost

Active Publication Date: 2015-08-05
ENERGY CHINA APCC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual on-site operations, due to the negligence of the operators or the poor communication between different teams, it often happens that it is unclear whether the dark bag at hand has been used, and there is no ready-made method to distinguish and verify it, thus misunderstanding Two or more exposures of a negative film in a dark bag, resulting in two or more overlapping images appearing on one negative film, which is commonly known as "twins"
This not only wastes film, but also wastes man-hours

Method used

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  • Camera bag used for distinguishing film exposure and distinguishing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Such as figure 1 As shown, a dark bag for distinguishing whether a film is exposed or not includes a dark bag body 1, and a one-way light-transmitting layer 3 is pasted on the outer edge of the dark bag body 1, and the position of the one-way light-transmitting layer 3 does not affect The image on the internal film shall prevail. The light-transmitting surface of the one-way light-transmitting layer 3 in contact with the dark bag body 1 is coated with a phosphorescent material layer 2, while the opaque surface of the one-way light-transmitting layer 3 is outside. The area of ​​the one-way transparent layer 3 is larger than the area of ​​the phosphor layer 2 .

[0020] Further, the material of the phosphor layer 2 is phosphor powder or aluminate.

Embodiment 2

[0022] A method for distinguishing whether a film is exposed or not, using a dark bag with a phosphorescent material layer and a one-way light-transmitting layer pasted on the outside of the dark bag body to cut the film to be detected; wherein the light-transmitting surface of the one-way light-transmitting layer The transmittance is greater than 70%, and the light transmittance of the opaque surface on the other side is 0%. Before exposing the film, observe whether there is visible light in the one-way light-transmitting layer on the dark bag in a dark state. If visible light is found in the phosphorescent material layer inside the one-way light-transmitting layer, it means that the film in the dark bag has been exposed. ; If there is no visible light, it indicates that the film in the dark bag is not exposed.

[0023] For example, when the dark bag needs to be reused in a short period of time, the phosphorescent material used is the II-VI group short-term quick-acting phosp...

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Abstract

The invention provides a camera bag used for distinguishing film exposure and a distinguishing method thereof. The camera bag used for distinguishing film exposure comprises a camera bag body. The external side of the camera bag body is provided with a unidirectional light transmitting layer. The light transmitting surface of the unidirectional light transmitting layer is coated by a phosphorescent substance layer which is connected with the external side of the camera bag body. When X-rays or gamma-rays are applied to perform exposure on the camera bag filled with films in radiographic inspection, the phosphorescent substance on the camera bag starts to absorb high-energy rays, and internal electrons are transitioned to the excited state from the ground state; and after exposure ends, the electrons at the excited state are de-excited back so as to continuously release visible light. Whether the phosphorescent substance layer releases visible light is observed under the dark state. If visible light is released, the camera bag is exposed, or the camera bag is not exposed so as to be convenient and rapid. Besides, the situation of "twins" can be effectively prevented, and the films and time can be saved.

Description

technical field [0001] The invention relates to the technical field of radiation detection, in particular to a dark bag and a method for distinguishing whether a film is exposed or not. Background technique [0002] Radiographic flaw detection is a common method for internal quality inspection of metals or non-metals in industry. It uses high-energy rays such as X-rays or γ-rays to penetrate the workpiece to be inspected, and projects its internal information on the film. After the film is washed, Evaluate negative film images to determine defects such as cracks, pores, and slag inclusions inside the workpiece. The film is usually packaged in a dark bag to protect it from interference with visible light waves. However, in actual on-site operations, due to the negligence of the operators or the poor communication between different teams, it often happens that it is unclear whether the dark bag at hand has been used, and there is no ready-made method to distinguish and veri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B42/04G01N23/18G01N21/00
Inventor 王勇黄向文徐聪
Owner ENERGY CHINA APCC