X-ray bulb tube focal spot actual position detection device

Abstract

The utility model relates to an X-ray bulb tube focal spot actual position detection device, in particular to the technical field of X-ray bulb tube focal spot detection, which comprises a detection cabinet, a bulb tube support installation room is arranged on the upper layer of the detection cabinet, a device and equipment installation room is arranged on the second layer of the detection cabinet, and the detection cabinet is used for installing core components of the X-ray bulb tube focal spot actual position detection device. The lower layer of the detection cabinet is a power supply placing room. According to the X-ray bulb tube focal spot actual position detection device, the X-ray bulb tube emits X-rays downwards, the vertical probe is projected to the rectangular detector light receiving plate, an image with probe projection is obtained in X-ray imaging software, the position of the probe is adjusted, and when the probe projection becomes a perfect circle, the X-ray bulb tube is turned into the perfect circle. And the probe is just at the actual focal spot light position of the X-ray bulb tube, so that the actual focal spot position of the X-ray bulb tube can be calculated. The device plays a crucial role in controlling the production quality of the X-ray bulb tube.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of X-ray bulb focal spot actual position detection devices, specifically refers to the deviation of the center position of the ray emitted by the detection X-ray bulb, respectively measure the deviation of the actual position of X-ray focal spot from theoretical center point in x, y axis direction.This utility model is applicable to the quality control of X-ray tube focal spot of industrial and security equipment. BACKGROUND

[0002] The focal spot position characteristics of X-ray bulb directly affect imaging resolution, the intensity of ray, and imaging artifacts, etc.The existing pinhole imaging detection method is to use a small hole to limit the passage of X-ray, and then form a focal spot image on the detector on the other side.The diameter of pinhole needs to be very small, possibly micrometer level, to obtain sufficient resolution.Then the focal spot position is measured by analyzing the obtained image.However, in actual operation, the collimation of pinhole is relatively difficult, and the X-ray tube of small dose X-ray will not be imaged, because the intensity of ray dose is not enough, resulting in no imaging or low image signal-to-noise ratio, which will not be able to detect the focal spot position of actual X-ray bulb.Furthermore, the manufacturing cost of this device is also relatively high, and it is difficult to realize in actual production. SUMMARY

[0003] In view of the above problems, the utility model adopts probe projection method, effectively solves the special requirements for pinhole, and the intensity of X-ray does not need to be too high.The utility model uses a probe with a diameter of 1.6mm, which is not limited to 1.6mm in actual application.The projection of probe with too small diameter is also too small, and the roundness of projection is difficult to confirm, and the collimation is also difficult to control.The shadow edge of projection of probe with too large diameter is relatively blurred, which affects the accuracy of measurement.The utility model adopts 1.6mm probe, which is the best scheme obtained through multiple tests.The probe is projected on the light receiving surface of detector perpendicular to the probe (here, it must be ensured that the center of light receiving surface of detector and the center of X-ray bulb outlet are coincident on the vertical plane, and this center is the theoretical focal spot position of X-ray bulb), and then an image with equal scale enlargement of light receiving surface with projection is obtained on the imaging software of detector.Further, the position of probe is adjusted to make the projection a perfect circle, and the obtained image is the final available image.Further, the distances from four quadrant points of perfect circle (probe projection) to the edge of light receiving surface are measured respectively, and the difference values of horizontal (x axis) and vertical (Y axis) in image are calculated, which are the positions of actual focal spot of X-ray bulb.

[0004] OBJECT

[0005] The utility model provides a kind of X-ray bulb focal spot actual position detection device, especially overcome the purpose of small dose X-ray bulb focal spot actual position measurement, and reduce X-ray bulb focal spot detection cost, difficulty, improve detection efficiency, control X-ray bulb production quality.

[0006] Technical scheme

[0007] To achieve the above object, the utility model takes the following technical scheme:

[0008] A device for X ray bulb focal spot actual position detection, including ball tube support, detector support, connecting aluminum plate, probe device, detector, stepping motor device. Theoretically, the X ray focal spot of X ray bulb emits in the center of light source area, and the actual X ray bulb has slight error in production and assembly, so that the focal spot is difficult to be in the center. The utility model calculates the position of actual focal spot by the difference of the projection of probe on the light receiving surface of detector to the edge of light receiving surface of detector. It must be noted that the light receiving surface of detector is perpendicular to probe and parallel to X ray exit hole, and the median line of light receiving surface of detector coincides with the median line of X ray exit hole. The position of probe is fine-tuned, so that the projection of probe becomes a regular circle, which indicates that the probe is in the actual focal spot position of X ray. Further, the difference of the projection surface of probe in x, y direction to the edge of light receiving surface of detector is calculated, which is the deviation value of x, y direction to theoretical focal spot. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 It is X ray focal spot position detection principle schematic view of the utility model;

[0010] Figure 2 It is the whole structure inside schematic view of the utility model;

[0011] Figure 3 It is detection cabinet structure schematic view of the utility model;

[0012] Figure 4 It is focal spot position detection device schematic view of the utility model;

[0013] Figure 5 It is ball tube installation support schematic view of the utility model;

[0014] Figure 6 It is connecting aluminum plate schematic view of the utility model;

[0015] Figure 7 It is probe device schematic view of the utility model;

[0016] Figure 8 It is stepping motor combination schematic view of the utility model;

[0017] Figure 9 It is detector support schematic view of the utility model;

[0018] Figure 10 It is connecting piece schematic view of the utility model;

[0019] In the diagram: 1. Testing cabinet; 11. X-ray tube support installation room; 12. Device and equipment installation room; 13. Power supply equipment installation room; 14. Equipment mounting hole; 15. Operating cover plate; 2. Focal spot position detection device; 21. X-ray tube support; 211. X-ray tube slot; 212. X-ray exit hole; 213. X-ray tube support fixing hole; 22. Connecting aluminum plate; 221. Aluminum plate fixing and positioning hole; 23. Probe device; 231. Probe; 232. Connecting glass plate; 233. Glass base plate; 24. Detector; 25. Stepper motor assembly; 251. X-axis control motor miniature precision slide; 252. Y-axis control motor miniature precision slide; 26. Detector bracket; 261. Detector slot; 262. Detector bracket fixing hole; 27. Connector. Detailed Implementation

[0020] The preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to better understand the purpose and features of this utility model. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of this utility model, but are only for illustrating the essential spirit of the technical solution of this utility model.

[0021] like Figure 1 As shown, the rectangular area is the photosensitive area of ​​the detector's light-receiving surface, and the gray area in the middle is the projection of probe 231 under X-rays. When probe 231 is at the actual focal spot position of the X-ray tube, the gray area becomes a perfect circle. At this time, the distances X (right), X (left), Y (up), and Y (down) from the four quadrant points of the perfect circle to the corresponding sides are measured respectively. Furthermore, the offset in the x-axis direction is calculated as x = X (right) - X (left), and the offset in the y-axis direction is calculated as y = Y (up) - Y (down). (x,y) is the actual position of the focal spot. It should be noted that the theoretical position of the focal spot is (0,0).

[0022] Furthermore, such as Figure 2 As shown, this utility model consists of a detection cabinet 1 and a focal spot position detection device 2.

[0023] Furthermore, such as Figure 3 As shown, the testing cabinet 1 is divided into a tube support installation room 11, a device installation room 12, a power supply equipment installation room 13, a device mounting hole 14, and an operation cover 15.

[0024] Specifically, the tube support installation room 11 and the device installation room 12 are used to install the focal spot position detection device 2. The tube support 21 is placed in the tube support installation room 11, and the operating cover plate 15 is opened to place the tube to be detected. The device installation room 12 is used to install the main body of the focal spot position detection device 2, and the entire focal spot position detection device 2 is penetrated through the two spaces through the device installation hole 14. The inner surfaces of the tube support installation room 11 and the device installation room 12 are all encapsulated with lead plates, and the lower surface of the cover plate 15 is also padded with a lead plate to ensure that the X-rays are completely in the lead plate encapsulated space and prevent leakage. The cover plate 15 also serves as a power switch, which is opened to cut off the power and closed to turn on the power. The power supply device installation room 13 is used to place the high-voltage and low-voltage power supply devices.

[0025] Further, as shown in Figure 4 , the focal spot position detection device 2 is divided into a tube support 21, a connecting aluminum plate 22, a probe device 23, a detector 24, a stepping motor combination 25, a detector support 26, and a connecting piece 27.

[0026] Further, as shown in Figure 5 , the tube support 21 has a tube clamping groove 211, an X-ray exit hole 212, and a tube support fixing hole 213.

[0027] Specifically, the tube clamping groove 211 is used to place the tube to be detected, and the lower surface of the clamping groove is just connected with the tube flange to make the X-ray exit center of the tube exactly in the center of the X-ray exit hole 212. The tube support fixing hole 213 is connected and fixed with the connecting aluminum plate 22.

[0028] Further, as shown in Figure 6 , the connecting aluminum plate 22 has four aluminum plate fixing and positioning holes 221, and the connecting aluminum plate 22 is divided into two parts, which are used to fix and position the tube support 21 and the detector support 26 to ensure that the tube support 21 and the detector support 26 are in a parallel state.

[0029] Further, as shown in Figure 7 , the probe device 23 is composed of a probe 231, a connecting glass plate 232, and a glass bottom plate 233.

[0030] Specifically, the glass bottom plate 233 is fixed on the top of the detector support 26, the probe 231 is vertically fixed on the connecting glass plate 232, and the connecting glass plate 232 is on the glass bottom plate 233 with a small gap to ensure that it can move forward and backward and left and right. When the probe 231 moves to the focal spot position of the X-ray, the projection of the probe 231 will become a perfect circle. The connecting glass plate 232 has four holes, which are fixed on the moving slider of the x-axis control motor micro-precision sliding table 251 by the connecting piece 27.

[0031] Further, as shown in Figure 8As shown, the stepper motor combination 25 is composed of an x-axis control motor micro-precision slide 251 and a y-axis control motor micro-precision slide 252.

[0032] Specifically, left and right are defined as the x-axis direction (right is positive), and front and back are defined as the y-axis direction (back is positive), the x-axis control motor micro-precision slide 251 is fixed on the moving slide block of the y-axis control motor micro-precision slide 252, and the moving slide block of the x-axis control motor micro-precision slide 251 is fixed with the connecting glass plate 232, when the moving slide block of the y-axis control motor micro-precision slide 252 moves, the x-axis control motor micro-precision slide 251 moves in the y-axis direction, that is, the probe 231 moves in the y-axis direction. The moving slide block of the x-axis control motor micro-precision slide 251 moves the probe 231 in the x-axis direction. As shown, the two motors are controlled by the stepper motor motion controller, so as to control the movement of the probe 231 in the x-axis and y-axis directions.

[0033] Further, as shown in Figure 9 The probe bracket 26 has a probe clamping groove 261 and a probe bracket fixing hole 262.

[0034] Specifically, the probe clamping groove 261 is used for installing the probe 24, and the probe 24 is connected to a computer and is magnified by a probe imaging software, etc. As shown in Figure 1 The actual focal spot offset (x, y) can be measured. The probe bracket fixing hole 262 is used for fixing the probe bracket 26 on the connecting aluminum plate 22.

[0035] Further, as shown in Figure 10 The connecting piece 27 is shown.

[0036] Specifically, the connecting piece 27 is used for fixing the connecting glass plate 232 and ensuring that the connecting glass plate 232 is parallel to the probe bracket 26 in the horizontal direction.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An X-ray tube focal spot actual position detection device, comprising a detection cabinet (1), characterized in that: The upper layer of the detection cabinet (1) is a tube support installation room (11), the second layer of the detection cabinet (1) is a device installation room (12), the lower layer of the detection cabinet (1) is a power supply equipment installation room (13), the top of the second layer of the detection cabinet (1) has an equipment installation hole (14), and the top of the detection cabinet (1) has an operation cover plate (15).

2. The X-ray tube focal spot actual position detection device according to claim 1, characterized in that: The device installation room (12) is used for installing a main body part of the focal spot position detection device (2), and the tube support installation room (11) is used for installing a tube support (21) part of the focal spot position detection device (2).

3. The X-ray tube focal spot actual position detection device according to claim 2, characterized in that: The focal spot position detection device (2) comprises a tube support (21), the tube support (21) is fixed on a detector support (26) through two connecting aluminum plates (22) by means of the equipment installation hole (14), the detector support (26) is internally provided with a detector (24), the detector support (26) is provided with a probe device (23) on the upper surface, and the probe device (23) is connected with a stepping motor combination (25) by means of a connecting piece (27).

4. The X-ray tube focal spot actual position detection device according to claim 2, characterized in that: The tube support (21) is provided with a tube clamping groove (211) on the top, the tube support (21) is provided with an X-ray outlet hole (212) in the center, and the tube support (21) is provided with two tube support fixing holes (213) on each side.

5. The X-ray tube focal spot actual position detection device according to claim 3, characterized in that: The detector support (26) is provided with a detector clamping groove (261) on the top, and the detector support (26) is provided with detector support fixing holes (262) on the two sides.

6. The X-ray tube focal spot actual position detection device according to claim 3, characterized in that: The probe device (23) is provided with a probe (231) on the upper surface, the probe (231) is vertically fixed on a connecting glass plate (232), the connecting glass plate (232) is provided with a glass bottom plate (233) below, and the connecting glass plate (232) and the glass bottom plate (233) are layered.

7. The device for detecting the actual position of the focal spot of an X-ray tube according to claim 3, characterized in that: The stepping motor combination (25) is composed of two stepping motors, the stepping motor combination (25) controls the left-right movement of the probe (231) by means of an x-axis control motor micro-precision sliding table (251), and the stepping motor combination (25) controls the front-back movement of the probe (231) by means of a y-axis control motor micro-precision sliding table (252).

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