Static CT scanning equipment based on modular X-ray emitter

Abstract

The utility model discloses a static CT scanning device based on a modularized X-ray emitter, which comprises a plurality of X-ray emitter modules, each X-ray emitter comprises a vacuum tube, a plurality of X-ray sources are arranged in the vacuum tube, the top of the vacuum tube is respectively provided with a controller and a turbo pump vacuum flange, and the controller is connected with the turbo pump vacuum flange. The plurality of X-ray emitter modules are distributed and combined in an annular array, an annular detector is arranged on the inner sides of the plurality of X-ray emitter modules, a getter box is arranged on the inner side of the vacuum tube, and a flat panel detector is arranged on the inner sides of the plurality of X-ray emitter modules. And the plurality of X-ray emitter modules are coupled with the adjacent annular detectors or flat panel detectors. Compared with a traditional CT system, a sliding ring, a rotating rack and a pipe cooling system are not needed, the CT system is lighter and cheaper, a single target does not need to be rotated for cooling, and therefore the complexity and maintenance problems caused by physical rotation are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to X ray source technical field especially based on static CT scanning equipment of modularization X ray emitter. BACKGROUND

[0002] X-ray computed tomography (CT) technology is an advanced technology for three-dimensional imaging, which reconstructs the internal structure of an object through multiple X-ray projection images acquired from different angles. This technology has been widely used in the industrial field, especially in material testing, structural analysis and non-destructive testing (NDT), which can provide high-resolution internal images to help identify and evaluate material defects, component structural integrity and potential quality problems.

[0003] Currently, the size, weight and cost of traditional CT scanning equipment greatly limit its application in resource-limited environments, especially in some non-large industrial enterprises and high-cost limited detection scenarios. Traditional CT scanning equipment usually uses an X-ray source installed on a rotating frame to collect X-ray projections from multiple angles when the rotating frame rotates around the object to be detected. The rotating system in the traditional CT scanning equipment occupies most of the mass, volume and power requirements, which limits its application in small industrial detection environments, and the high angular momentum (rotational speed can reach 300 revolutions per minute) of the rotating system also makes it less applicable in special space environments. SUMMARY

[0004] The utility model aims at solving the problem that the size, weight and cost of traditional CT scanning equipment greatly limit its application in resource-limited environments, especially in some non-large industrial enterprises and high-cost limited detection scenarios, and proposes a static CT scanning equipment based on modular X-ray emitter.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The static CT scanning equipment based on modular X-ray emitter includes multiple X-ray emitter modules, the X-ray emitter includes a vacuum tube, multiple X-ray sources are arranged inside the vacuum tube, a controller and a turbine pump vacuum flange are arranged at the top of the vacuum tube, multiple X-ray emitter modules are arranged in a ring array distribution combination, and a ring-shaped detector is arranged inside multiple X-ray emitter modules.

[0007] Further, an air suction agent box is arranged inside the vacuum tube.

[0008] Further, a plurality of the X-ray emitter modules are internally provided with a flat panel detector.

[0009] Further, a plurality of the X-ray emitter modules are coupled with adjacent annular detectors or flat panel detectors.

[0010] Further, the inside of the vacuum tube is provided with a Channeltron electron multiplier.

[0011] Further, the inside of the vacuum tube is provided with a Mg photocathode and an anode target.

[0012] Further, a window is formed on one side of the vacuum tube.

[0013] The beneficial effects of the present application are:

[0014] 1. The present application simplifies the design of the rotating frame of the system, reduces the complexity and volume of the rotating frame, removes the motor and gear system for rotation in the traditional CT scanner, eliminates the high-bandwidth slip ring in the traditional CT scanner for transmitting projection data from the rotating part to the static computer, and is lighter and cheaper than the traditional CT system without the need for a slip ring, a rotating frame and a tube cooling system.

[0015] 2. The present application removes the rotating anode and the complex cooling system required therefor, and since the heat is evenly distributed on multiple anode targets, there is no need to cool a single target by rotation, thereby avoiding the complexity and maintenance problems caused by physical rotation, and enabling the system to be more portable while maintaining imaging quality, and being particularly suitable for use in space-limited environments. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 Figure 1 is a first front view structural schematic diagram of a static CT scanning device based on a modular X-ray emitter according to the present application;

[0017] Fig. 2 Figure 2 is a module enlarged structural schematic diagram of a static CT scanning device based on a modular X-ray emitter according to the present application;

[0018] Fig. 3 Figure 3 is a second front view structural schematic diagram of a static CT scanning device based on a modular X-ray emitter according to the present application.

[0019] In the figure: 1, vacuum tube; 2, X-ray source; 3, controller; 4, turbo pump vacuum flange; 5, getter box; 6, annular detector; 7, flat panel detector. DETAILED DESCRIPTION

[0020] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments.

[0021] With reference to Figs. 1-3 The static CT scanning device based on the modular X-ray emitter comprises a plurality of X-ray emitter modules, characterized in that the X-ray emitter comprises a vacuum tube 1, a plurality of X-ray sources 2 are arranged in the interior of the vacuum tube 1, the X-ray emitter module is an arc-shaped area, the inner circle radius is 227.5 mm, the seven X-ray sources 2 are uniformly distributed in the middle, the top of the vacuum tube 1 is respectively provided with a controller 3 and a turbo pump vacuum flange 4, the plurality of X-ray emitter modules are arranged in a ring array, 15 X-ray emitter modules are combined in series, so that a complete ring-shaped distributed radiation source can be combined, and a ring-shaped detector 6 is arranged on the inner side of the plurality of X-ray emitter modules.

[0022] The inner side of the vacuum tube 1 is provided with a getter box 5, the inner side of the plurality of X-ray emitter modules is provided with a flat panel detector 7, and the plurality of X-ray emitter modules are coupled with adjacent ring-shaped detectors 6 or flat panel detectors 7.

[0023] The interior of the vacuum tube 1 is provided with a Channeltron electron multiplier, the Channeltron electron multiplier is used to amplify the photocurrent generated by the photocathode, the Channeltron electron multiplier can amplify the current generated by the input photocathode to times, so that each single source element can generate a tube current of up to, the tube current can be adjusted by adjusting the bias voltage of the Channeltron electron multiplier or the input illumination intensity, the Channeltron electron multiplier is located in the vacuum tube and is isolated from the external environment through a quartz window, an ultraviolet LED is used to irradiate the photocathode of the input window, and the generation of the photocurrent is further enhanced, and an Mg layer is deposited on the input end of the Channeltron electron multiplier by a thermal evaporation technology to construct the photocathode. The internal structure of the Channeltron electron multiplier is composed of a series of closely wound glass capillary tubes, the capillary tubes are coated with an emission layer, and a bias voltage is provided to push the injected electrons to move forward along the capillary tubes. The electrons generated by photoemission are guided to the input end of the Channeltron electron multiplier and repeatedly collide on the inner wall of the capillary tube, each collision can cause secondary electron release, so as to amplify the original electron beam, and the weak electron beam current generated finally is amplified to times by the Channeltron electron multiplier.

[0024] The inside of the vacuum tube 1 is provided with a Mg photocathode and an anode target, and magnesium (Mg) is used as the photocathode material, and an electron beam is generated by irradiation excitation of ultraviolet light emitted by an LED, Mg has high quantum efficiency at the wavelength, and the production cost is low, the processing is simple, the service life of the Mg photocathode is longer than that of the carbon nanotube-based electron source, and an ultrahigh vacuum environment is not required, and a turbo pump is sufficient to maintain the required vacuum level, without using a more complex and poor portability diffusion pump or ion pump. In addition, the Mg photocathode can withstand atmospheric pressure in a short time, facilitating routine maintenance and small-scale rapid replacement, and an anode target made of tungsten is acted on by an adjustable positive voltage to generate X-rays. The positively charged anode accelerates the electrons at the output end of the Channeltron electron multiplier by generating an electrostatic field, and high-energy electrons finally generate X-rays when they hit the anode, and since the heat is evenly distributed on multiple anode targets, rotation of a single target for cooling is not required, thereby avoiding the complexity and maintenance problems caused by physical rotation. One side of the vacuum tube 1 is provided with a window, and the generated X-rays leave the vacuum shell through the window located beside the anode.

[0025] The working principle of the embodiment is as follows: in use, the 7 photocathode-based X-ray sources 2 in the vacuum tube 1 are combined in series to form a complete annular distribution X-ray source by combining 15 X-ray emitter modules, the X-ray emitter modules are connected to a turbo pump through a turbo pump vacuum flange 4, the vacuum tube 1 reaches a vacuum degree, the vacuum tube 1 is provided with a getter box 5 to ensure that the vacuum state can be maintained for a long time, the X-ray emitter modules are coupled with adjacent annular detectors 6 or flat panel detectors 7, the X-ray sources 2 are digitally controlled through ultraviolet LED illumination, a controller 3 is installed on the top of the X-ray emitter modules, the generated X-rays leave the vacuum shell through the window located beside the anode, and the internal structure of an object can be reconstructed through multiple X-ray projection images obtained from different angles without rotation by collecting X-ray projections.

[0026] The above merely describes a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. Static CT scanning device based on modular X-ray emitters comprising a plurality of X-ray emitter modules, characterized in that, The X-ray emitter comprises a vacuum tube (1), the inside of the vacuum tube (1) is provided with a plurality of X-ray sources (2), the top of the vacuum tube (1) is respectively provided with a controller (3) and a turbo pump vacuum flange (4), a plurality of the X-ray emitter modules are combined in a ring array distribution, and the inside of the plurality of X-ray emitter modules is provided with a ring-shaped detector (6).

2. The modular X-ray emitter based static CT scanning device according to claim 1, characterized in that, The inside of the vacuum tube (1) is provided with a getter box (5).

3. The modular X-ray emitter based static CT scanning device according to claim 1, characterized in that, The inside of the plurality of X-ray emitter modules is provided with a flat panel detector (7).

4. The modular X-ray emitter based static CT scanning device of claim 3, wherein, The plurality of X-ray emitter modules are coupled with adjacent ring-shaped detectors (6) or flat panel detectors (7).

5. The modular X-ray emitter based static CT scanning device of claim 1, wherein, The inside of the vacuum tube (1) is provided with a Channeltron electron multiplier.

6. The modular X-ray emitter based static CT scanning device of claim 1, wherein, The inside of the vacuum tube (1) is provided with an Mg photocathode and an anode target.

7. The modular X-ray emitter based static CT scanning device of claim 1, wherein, A window is formed in one side of the vacuum tube (1).

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