CN113063807A - Ray light field adjusting mechanism and ray imaging device - Google Patents
Ray light field adjusting mechanism and ray imaging device Download PDFInfo
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- CN113063807A CN113063807A CN202110269586.1A CN202110269586A CN113063807A CN 113063807 A CN113063807 A CN 113063807A CN 202110269586 A CN202110269586 A CN 202110269586A CN 113063807 A CN113063807 A CN 113063807A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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- Analysing Materials By The Use Of Radiation (AREA)
Abstract
A ray light field adjusting mechanism is provided for adjusting the light field range generated by a ray source. The light field adjusting mechanism comprises a movable device and at least one pair of collimators, wherein the movable device is used for carrying a ray source, and the collimators are oppositely arranged to form an opening for limiting the light field range of the X-ray. Wherein, the collimator angle is adjustable for changing the opening size, and the mobile device position is adjustable for moving the ray source. A radiographic imaging apparatus is also provided.
Description
Technical Field
The invention relates to a ray light field adjusting mechanism.
Background
X-ray food inspection is mainly used to detect foreign substances in food, including stone, glass, stainless steel, and the like. The principle is that attenuation of X-ray after passing through food is utilized to form an image in a detector, then a signal is captured to form an image, and whether foreign matters exist in the food is judged according to a designed algorithm.
In the existing food and industrial product nondestructive testing field, the irradiation field of X-ray is related to the height of an X-ray light source and the width of a collimator, and once the height of the X-ray light source and the opening size of the collimator are fixed, the range of the light field is also fixed. Generally, a fixed light source height and a fixed collimator width are set before the X-ray imaging product is shipped from a factory, and thus, an X-ray irradiation light field generated by the imaging product is fixed.
However, the sizes of the detected food products are different, and if the operation is adopted, the range of the light field is limited, so that the types of the detected food products are fixed and single, the size range of the detectable products is easy to limit, and the application range is further limited. Such an imaging device has a certain limitation in application to detecting the height and width of a product. For example, if a relatively high or wide food is encountered, the food cannot be completely covered by the light field, and only half of the image of the food can be detected, resulting in incomplete detection results and possible missing detection of foreign matter.
Disclosure of Invention
An object of the present invention is to provide a radiation field adjusting mechanism to flexibly adjust the range of an irradiation field.
The ray light field adjusting mechanism comprises a movable device and at least one pair of collimators, wherein the movable device is used for carrying the ray source, the collimators are oppositely arranged to form an opening, and the opening limits the light field range. The collimator is adjustable in angle and used for changing the size of the opening, and the movable device is adjustable in position and used for moving the ray source.
In one or more embodiments, the moving means comprises a slider for carrying the radiation source and a sliding mating piece providing a slide for movement of the slider.
In one or more embodiments, at least a portion of the runners extend in a centerline direction of the opening.
In one or more embodiments, the mobile device further comprises an adjustment member connected to the sliding member for adjusting the position of the sliding member on the sliding fit.
In one or more embodiments, the light field adjusting mechanism further comprises a control member, the moving device comprises a linear actuator, the collimator comprises a collimator driving device, and the linear actuator and/or the collimator driving device are in bidirectional signal connection with the control member.
In one or more embodiments, the movable device sets a plurality of movement positions. The plurality of moving gears are respectively arranged along the direction of the median line of the opening, or the plurality of moving gears are respectively arranged on two sides of the median line of the opening.
Another object of the present invention is to provide a radiation imaging apparatus including the above-described radiation light field adjusting mechanism.
The ray light field adjusting mechanism is used for arranging the ray source on the movable device, and the position of the ray source can be flexibly adjusted by moving the movable device, so that the intensity of X rays irradiating on the detector and the field range are directly changed; meanwhile, the light field range of the X-ray is limited by adjusting the size of the opening of the collimator, and the irradiation range of the X-ray is further adjusted on the basis of the movement of the ray source, so that the X-ray imaging light field range can adapt to the size specifications of different types of products, and the detection precision and universality of the equipment are improved.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which:
fig. 1 is a schematic diagram of a radiation field adjusting mechanism.
Fig. 2 is a schematic view of the radiation field adjusting mechanism in an operating state.
Fig. 3 is a schematic view of the ray light field adjusting mechanism in another working state.
Description of the main reference numerals
10 ray source
20 Detector
30 collimator
40 moving device
11 sliding member
12 sliding fitting
15X-ray
16X-ray light field range
Detailed Description
The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from those described herein, and it will be readily appreciated by those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the invention. It is noted that these and other figures which follow are merely exemplary and not drawn to scale and should not be considered as limiting the scope of the invention as it is actually claimed.
Referring to fig. 1, a radiation source 10 provides X-rays 15, and an irradiation space formed by the X-rays 15 that can be irradiated onto a detector 20 is an X-ray field range 16. The object to be measured is located within the X-ray field 16 and the X-rays 15 pass through the object to be measured before reaching the detector 20. Since the X-ray 15 is attenuated after irradiating the object to be measured, the X-ray signals captured by the detector 20 are different, and it is determined whether or not there is a foreign object in the object to be measured.
The object to be measured includes, but is not limited to, food, industrial products, and the like. Therefore, in order to further ensure that the objects to be measured with different specifications are all located within the X-ray light field range 16, the X-ray light field range 16 needs to be adjusted by the ray light field adjusting mechanism, so as to ensure that the objects to be measured are always located within the X-ray light field range 16, and thus, nondestructive detection of the objects to be measured with various specifications is realized.
With continued reference to fig. 2 and 3, the radiation field adjusting mechanism for adjusting the X-ray field range 16 further includes a movable device 40 and at least one pair of collimators 30. The radiation source 10 is fixed to a movable apparatus 40, and the position of the movable apparatus 40 is adjustable for moving the radiation source 10. Since the source 10 emits X-rays 15, the position of the source 10 directly affects the intensity of the X-rays 15 and the X-ray field range 16.
A pair of collimators 30 are arranged facing each other to form an opening 32, the opening 32 defining the size of the X-ray field 16. I.e. a part of the X-rays 15 is blocked by the collimator 30, the beam can only pass through the opening 32 formed by the collimator 30, and thus the opening 32 defines the size of the X-ray field 16. Further, if the radiation field adjusting mechanism includes a plurality of pairs of collimators 30, the size of the X-ray field range 16 is limited by the openings 32 formed in the plurality of pairs of collimators 30.
The angle of the collimator 30 is adjustable to vary the size of the opening 32, and the extent of the opening 32 directly affects the extent of the X-ray field 16. Therefore, by adjusting the position of the movable device 40 and the angle of the collimator 30, flexible adjustment of the range of the X-ray field can be achieved.
For example, in one embodiment as shown in fig. 2, when the movable mechanism 40 moves, the movable mechanism 40 moves the radiation source 10, and the radiation source 10 in the new position is located below the old radiation source 10'. The path of the X-rays 15 originally emitted by the old source 10' includes a path 151 and a path 152, wherein the path 152 is affected by the angularly adjusted collimator 30, the light is blocked, and only the X-rays 15 on the path 151 can pass through the opening 32 formed by the collimator 30 and finally reach the detector 20. Thus, the collimator 30 effectively reduces the X-ray field range 16 by varying the angle. It will be appreciated that only a portion of the X-rays 15 from the new source 10 will pass through the opening 32 formed by the collimator 30 and ultimately reach the detector 20.
Continuing to refer to FIG. 2, the new radiation source 10 located under the old radiation source 10 'forms a larger X-ray field range 16 than the X-ray field range 16 formed by the old radiation source 10', so that the X-ray field range 16 is effectively increased by moving the adjusting mechanism 40 downward.
One preferred embodiment is to preset the movable mechanism 40 with a plurality of adjustment positions, each adjustment position having a different position of the movable mechanism 40, and to change the positions according to the specific measurement situation, so as to have different X-ray field ranges 16.
One example of the shift positions is provided along the median direction of the opening 32. When the X-ray light field range 16 needs to be increased, the movable mechanism 40 is adjusted to a lower gear; when it is desired to reduce the X-ray field range 16, the movable mechanism 40 is adjusted to a higher gear position, i.e., a height position away from the collimator 30. During actual measurement, a worker can flexibly adjust gears according to actual requirements, and the size of the X-ray light field range 16 can be changed conveniently and quickly.
In another embodiment of the adjustment gear, which is disposed on both sides of the median line of the opening 32, referring to fig. 3, the new radiation source 10 can be located at the lower left (upper) side or the lower right (upper) side of the old radiation source 10', so that the adjustment flexibility of the X-ray field range 16 can be increased and the adjustment process can be simplified by changing the adjustment gear.
Still another embodiment of the adjustment range is disposed on both sides of the median line of the opening 32 and along the height direction of the median line, respectively, to further increase the adjustment range of the X-ray field range 16.
Further, mobile device 40 comprises a slide 11 and a sliding mating member 12, slide 11 being adapted to fix radiation source 10, and sliding mating member 12 comprising a slide for movement of slide 11. The slide may be arranged in a plurality of dimensions, at least some of which extend along the median line of opening 32 to provide for adjustment of source 10 in the elevation direction (i.e., up and down in fig. 2).
Referring to fig. 3, the new source 10 is located at the lower left of the old source 10 ', the X-ray 15 emitted from the new source 10 forms an X-ray field range 16, and the X-ray 153 emitted from the old source 10 forms an X-ray field range 16' smaller than the X-ray field range 16 formed by the new source 10, so that the adjustment of the X-ray field range 16 can be effectively realized by adjusting the position of the source 10. Meanwhile, the position of the new ray source 10 is adjusted to the left lower side of the old ray source 10', the X-ray light field range 16 formed by the new ray source 10 moves to the right, the irradiation range of the X-ray light field range 16 on the detector 20 is increased, and the placing position of the product to be detected can be more flexible. By arranging the slide ways on the sliding fittings 12 in multiple dimensions, the range of motion of the radiation source 10 will be further increased, and thus the X-ray field range 16 will be further expanded.
The movable mechanism 40 includes, but is not limited to, a sliding device that engages with a sliding track, for example, the sliding device may be a pulley, and the sliding device may include a sliding track that engages with the pulley to adjust the position of the movable mechanism 40.
On the basis of the above-described embodiment, in order to adjust the position of the sliding member 11, the movable device 40 further comprises an adjusting member (not shown in the figure) connected to the sliding member 11 for adjusting the position of the sliding member 11 on the sliding engagement member 12. One embodiment of the adjustment element is a rocker, which is connected to the sliding element 11 and by manually pulling the rocker adjusts the position of the sliding element 11 on the sliding counterpart 12.
Preferably, the light field adjusting mechanism further comprises a control member (not shown), the movable device 40 comprises a linear actuator, the collimator 30 comprises a collimator driving device, and the linear actuator and/or the collimator driving device are in bidirectional signal connection with the control member.
By the operator inputting the adjustment signal to the control member, the linear actuator and/or collimator driving device on the movable device receives the adjustment signal from the control member and drives the movable device 40 to change the position and/or the movable device 40 to adjust the angle. Meanwhile, the adjustment result of the movable device 40 and/or the collimator 30 can also be fed back to the operator through the control part, so that the operator can know the state of the movable device 40 and/or the collimator 30 in time. Linear actuators include, but are not limited to, the use of components such as electric screws or electric cylinders or electric push rods. By setting the control member, the adjustment accuracy of the movable device 40 and/or the collimator 30 can be improved, the adjustment process is also simplified, manual adjustment by a worker is not required, and the detection efficiency is improved.
The use of the ray light field adjusting mechanism is explained below by various embodiments.
For example, in the first embodiment, the movable device 40 drives the radiation source 10 to move downward, and if the collimator 30 is not changed, the range 16 of the X-ray field formed by the new radiation source 10 will increase.
In contrast, in the second embodiment, the movable device 40 drives the radiation source 10 to move upward, and if the collimator 30 is not changed, the range 16 of the X-ray field formed by the new radiation source 10 will be reduced.
Further, in the third embodiment, the movable device 40 drives the radiation source 10 to move upward, and at the same time, the collimator 30 changes the angle to enlarge the opening 32, so that the X-ray light field range 16 formed by the new radiation source 10 will have a larger probability of not changing.
In the fourth embodiment, the movable device 40 is not changed, and only the angle of the collimator 30 is adjusted to increase the opening 32, so that the X-ray field range 16 is increased.
The embodiment of the light field adjusting mechanism includes, but is not limited to, the above embodiments, and the position of the movable device 40 and/or the angle of the collimator 30 can be flexibly adjusted according to the detection requirement during the detection process, so as to adjust the X-ray light field range 16 to a suitable size.
By combining the description of the ray light field adjusting mechanism, the ray imaging device can be understood, and the ray imaging device comprises the light field adjusting mechanism, can effectively adjust the irradiation range of X rays, ensures that products to be detected with various sizes can be in the irradiation light field range of the X rays, and avoids the risk of missed detection. Meanwhile, products with different sizes can be applied to the same ray imaging device, so that the ray imaging device has universality.
Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. For example, the radiation source is not limited to emitting X-rays, or the adjustable movement trajectory of the movable means is not limited to a direction along the median line of the opening, etc. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.
Claims (9)
1. Ray light field adjustment mechanism for adjust the light field scope that the ray source produced, its characterized in that, this light field adjustment mechanism includes:
the movable device is used for carrying the ray source; and
at least one pair of collimators arranged in opposition to each other to form an opening, the opening defining the light field range;
the collimator is adjustable in angle and used for changing the size of the opening, and the movable device is adjustable in position and used for moving the ray source.
2. The radiation field adjustment mechanism of claim 1, wherein said movable means comprises a slider for carrying said radiation source and a sliding engagement member providing a slide for movement of said slider.
3. The radiation field adjusting mechanism of claim 2, wherein at least a portion of the slide extends along the opening centerline.
4. The radiation field adjustment mechanism of claim 2, wherein said movable means further comprises an adjustment member connected to said sliding member for adjusting the position of said sliding member on said sliding engagement member.
5. The radiation field adjusting mechanism of claim 1, further comprising a control member, wherein the movable device comprises a linear actuator, wherein the collimator comprises a collimator driving device, and wherein the linear actuator and/or the collimator driving device is in bidirectional signal connection with the control member.
6. The radiation field adjusting mechanism of claim 1, wherein the movable device is provided with a plurality of moving steps.
7. The radiation light field adjusting mechanism according to claim 6, wherein the plurality of shift positions are respectively provided along a direction of a median line of the opening.
8. The radiation field adjusting mechanism according to claim 6, wherein the plurality of shift positions are respectively provided on both sides of a median line of the opening.
9. A radiographic imaging apparatus, characterized by comprising the light field adjusting mechanism according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110269586.1A CN113063807A (en) | 2021-03-12 | 2021-03-12 | Ray light field adjusting mechanism and ray imaging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110269586.1A CN113063807A (en) | 2021-03-12 | 2021-03-12 | Ray light field adjusting mechanism and ray imaging device |
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| CN113063807A true CN113063807A (en) | 2021-07-02 |
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| CN202110269586.1A Pending CN113063807A (en) | 2021-03-12 | 2021-03-12 | Ray light field adjusting mechanism and ray imaging device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115931937A (en) * | 2021-08-17 | 2023-04-07 | 同方威视技术股份有限公司 | Backscatter inspection apparatus |
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