CN111528887A

CN111528887A - Automatic balancing device, tomography imaging equipment and automatic balancing method

Info

Publication number: CN111528887A
Application number: CN202010360217.9A
Authority: CN
Inventors: 梁宏锋; 林晓珍; 陈俊
Original assignee: Wuhan Zhongke Medical Technology Industrial Technology Research Institute Co Ltd
Current assignee: Wuhan Zhongke Medical Technology Industrial Technology Research Institute Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-08-14

Abstract

The invention provides an automatic balancing device, a tomography imaging device and an automatic balancing method. The automatic balancing device includes: base, rotating base plate, ray emission subassembly, ray detection subassembly and two counter weight subassemblies, rotating base plate has radial direction and perpendicular to radial direction's tangential direction, ray emission subassembly with the ray detection subassembly is followed radial direction relatively install in rotating base plate, just the ray detection subassembly can be followed the tangential direction removes, two the counter weight subassembly with radial direction is the symmetry line symmetry set up in rotating base plate is last, just the counter weight subassembly for the radial direction slope sets up. The detection assembly is provided with a plurality of scanning visual fields in the process of moving along the tangential direction, and the plurality of scanning visual fields can be overlapped and fused to obtain the whole image information of the scanned object so as to enlarge the scanning visual field of the automatic balancing device and increase the imaging area of the scanned object.

Description

Automatic balancing device, tomography imaging equipment and automatic balancing method

Technical Field

The invention relates to the technical field of imaging equipment, in particular to an automatic balancing device, fault imaging equipment and an automatic balancing method.

Background

For a balancing device in the current imaging equipment, an X-ray source and an X-ray detector move along the radial direction to adjust the magnification, and the moving direction of a balancing mass block is automatically adjusted to be parallel to the moving direction of the X-ray source and the X-ray detector. The center of gravity of the adjusting rotating part of the fixed balance mass is moved to the X-axis, and when the amplification ratio is adjusted along the radial direction by the X-ray source and the X-ray detector or by one of the X-ray source and the X-ray detector, the center of gravity of the whole body is adjusted to the y-axis by the corresponding moving balance mass. However, the above-described balancing device has a single scanning range, and the scanning image obtained by the device has a narrow range.

Disclosure of Invention

In view of the above, it is necessary to provide an automatic balancing device, a tomographic imaging apparatus, and an automatic balancing method that expand a scanning field of view, in order to solve the problem that the scanning range of the conventional balancing device is single, which results in a narrow scanning image range.

The above purpose is realized by the following technical scheme:

an automatic balancing device comprising: base, rotating base plate, ray emission subassembly, ray detection subassembly and two counter weight subassemblies, the rotatable setting of rotating base plate, just radial direction and perpendicular to have on the rotating base plate the tangential direction of radial direction, ray emission subassembly with the ray detection subassembly is followed radial direction install relatively in rotating base plate, just the ray detection subassembly can be followed the tangential direction removes, two the counter weight subassembly with radial direction sets up for the line of symmetry in on the rotating base plate, just the counter weight subassembly for the radial direction slope sets up.

In one embodiment, the radiation detection assembly includes a first driving unit and a radiation detector connected to the first driving unit, and the first driving unit drives the radiation detector to move along the tangential direction.

In one embodiment, the probe assembly is movable in the radial direction.

In one embodiment, the radiation emitting assembly includes a third driving unit and a radiation source disposed on the third driving unit, and the third driving unit drives the radiation source to move along the radial direction.

In one embodiment, the radiation detection assembly and the radiation emitting assembly are both movable along the radial direction.

In one embodiment, the automatic balancing device further comprises a radial moving assembly, the radial moving assembly is relatively provided with the ray emitting assembly and the ray detecting assembly, and the radial moving assembly can drive the ray assembly and the detecting assembly to move along the radial direction.

In one embodiment, the radial moving assembly includes a radial driving unit and a radial substrate connected to the radial driving unit, the radial substrate is relatively mounted with the radiation emitting assembly and the radiation detecting assembly, and the radial driving unit can drive the radial substrate to move along the radial direction and drive the radiation emitting assembly and the radiation detecting assembly to move along the radial direction.

In one embodiment, the radiation detection assembly further includes a second driving unit, and the second driving unit drives the first driving unit and the radiation detector to move along the radial direction;

the ray emission assembly comprises a third driving unit and a ray source arranged on the third driving unit, and the third driving assembly drives the ray source to move along the radial direction.

In one embodiment, each of the weight assemblies includes at least one weight block and a fourth driving unit connected to the weight block, the weight blocks of the two weight assemblies are symmetrically disposed on the rotating substrate with the radial direction as a symmetry line, the weight blocks of the two weight assemblies are both disposed in an inclined manner with respect to the radial direction, and the fourth driving unit drives the corresponding weight block to move so as to adjust the balance of the automatic balancing apparatus.

An automatic balancing method applied to the automatic balancing device according to any one of the above features, the automatic balancing method comprising the steps of:

acquiring displacement information of the ray emission assembly and the ray detection assembly after the relative positions of the ray emission assembly and the ray detection assembly are adjusted when the rotary substrate is in a working motion state;

calculating the moving distance and the moving direction of the counterweight component according to the obtained displacement information of the ray emission component and the ray detection component;

and automatically adjusting the counterweight component according to the calculated distance and the moving direction, so that the automatic balancing device can achieve balance again without stopping.

A tomographic imaging apparatus comprising a barrel and an automatic balancing device as recited in any of the above features, said automatic balancing device being disposed in said barrel.

After the technical scheme is adopted, the invention at least has the following technical effects:

according to the automatic balancing device, the tomography equipment and the automatic balancing method, after the ray emitting assembly emits the ray to pass through the scanning object, the ray emitting assembly can be projected to the ray detecting assembly, the ray detecting assembly can move along the tangential direction of the rotation of the rotating substrate, and the rotating substrate is dynamically balanced through the counterweight assembly. The ray detection assembly has a plurality of scanning visual fields in the process of moving along the tangential direction, and the plurality of scanning visual fields can be overlapped and fused to obtain the whole image information of a scanned object, so that the problem of narrow scanning range image range caused by single scanning range of the conventional balancing device is effectively solved, the scanning visual field of the automatic balancing device is expanded, and the imaging area of the scanned object is increased; simultaneously, still can solve the rotatory unbalanced problem that leads to after ray emission subassembly and the regulation of ray detection subassembly through the counter weight subassembly, improve automatic balancing unit's rotational stability.

Drawings

Fig. 1 is a perspective view of an automatic balancing apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the movement of one embodiment of the automatic balancing apparatus shown in FIG. 1;

FIG. 3 is a schematic diagram of the movement of another embodiment of the automatic balancing apparatus shown in FIG. 1;

FIG. 4 is a schematic diagram of the movement of still another embodiment of the automatic balancing apparatus shown in FIG. 1;

FIG. 5 is a schematic view of the automatic balancing apparatus shown in FIG. 1, which is balanced in an initial state;

fig. 6 is a schematic view of the automatic balancing apparatus shown in fig. 5 again achieving the balance.

Wherein:

100. an automatic balancing device; 110. a base; 120. rotating the substrate; 130. a radiation source; 140. a radiation detection assembly; 141. a radiation detector; 142. a first drive unit; 150. a counterweight assembly; 151. a balancing weight; 152. a fourth drive unit; 160. a radial movement assembly; 161. a radial drive unit; 162. a radial substrate; 200. the object is scanned.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the automatic balancing apparatus, the tomographic imaging apparatus and the automatic balancing method of the present invention are further described in detail by embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 4, an automatic balancing apparatus 100 of the present invention. The automatic balancing apparatus 100 is applied to a tomographic imaging apparatus. It is to be noted that the tomographic imaging apparatus can be applied to the medical field for medical or preclinical diagnosis, and of course, can also be applied to the industrial field. It is understood that the tomographic imaging apparatus herein refers to a Computed Tomography (CT) apparatus. The tomographic imaging apparatus may image a scan object 200 of a target, and optionally, the target may be a patient, and the scan object 200 may be a lesion region of the patient. Of course, in other embodiments of the present invention, the scanning object 200 may also be a lesion area of a small animal, and may also be a metal material in industry to detect whether there is damage to the metal material.

This automatic balancing unit 100 can its dynamic balance state of automatic adjustment for automatic balancing unit 100 can reach the self-balancing, avoids because the unbalanced of automatic balancing unit 100 causes the harmful effects to tomography equipment, improves automatic balancing unit 100's rotational stability, guarantees tomography equipment's normal operating performance. In addition, the automatic balancing apparatus 100 of the present invention can expand the scanning range, increase the imaging area of the scanning object 200, and facilitate the diagnosis of the operator.

In one embodiment, the automatic balancing apparatus 100 includes a base 110, a rotating substrate 120, a radiation emitting assembly, a radiation detecting assembly 140, and two weight assemblies 150. The rotating substrate 120 may be rotatably disposed on the susceptor 110. The rotating base plate 120 has a radial direction and a tangential direction perpendicular to the radial direction. The radiation emitting assembly is used for emitting radiation. The radiation detection assembly 140 is used for receiving radiation, the radiation detection assembly 140 and the radiation emitting assembly are disposed on the rotating substrate 120 opposite to each other along the radial direction, and the radiation detection assembly 140 can move along the tangential direction of rotation. Two weight components 150 are movably disposed on the rotating substrate 120 with the radial direction as a symmetry line, and the weight components 150 are disposed obliquely with respect to the radial direction.

The base 110 plays a bearing role for bearing various parts of the automatic balancing apparatus 100; meanwhile, the base 110 may also reliably support the automatic balancing apparatus 100, so as to prevent the position of the automatic balancing apparatus 100 from being driven during the rotation process. Also, the base 110 is installed in a cylinder of the medical tomographic apparatus. The rotating substrate 120 may be rotatably disposed on the susceptor 110. The rotary base plate 120 is provided in a circular shape in cross section, and the axis of the rotary base plate 120 coincides with the rotation center of the rotary base plate 120. The radial direction of the rotating substrate 120 is the diameter direction of the rotating substrate 120, and specifically, in fig. 1 and 2, the radial direction is arranged along the vertical direction, and the radiation emitting assembly and the radiation detecting assembly 140 are arranged opposite to each other along the radial direction, i.e., the vertical direction. The tangential direction refers to a direction perpendicular to the radial direction, i.e. the horizontal direction as shown in fig. 1 and 2. The radiation emitting element, the radiation detecting element 140 and the weight element 150 are disposed on a surface of the rotating substrate 120 and rotate with the rotating substrate 120.

The radiation emitting assembly can emit X-rays and the radiation detecting assembly 140 receives X-rays that scan the object through the scan object 200. After the automatic balancing device 100 is installed in a barrel of a tomography device, the ray emission component and the ray detection component 140 are located at two sides of a scanning cavity of the barrel relatively, and the scanning cavity accommodates a scanning object. Thus, X-rays emitted by the radiation emitting assembly may pass through a scan object of the scan object 200 to be received by the radiation detecting assembly 140. The radiation detection module 140 processes the received X-ray information to generate an image imaging signal, and feeds the image imaging signal back to the external controller, so as to perform image imaging on the scanned object of the scanned object 200.

Also, the radiation detecting assembly 140 may move in a tangential direction of the rotating substrate 120. Taking the direction shown in fig. 2 as an example, the tangential direction of rotation is the circumferential direction of the rotating substrate 120, the horizontal direction is defined as the X-axis direction, the vertical direction is defined as the Y-axis direction, the rotation axis of the rotating substrate 120 is defined as the Z-axis direction, and the rotating substrate 120 can rotate around the Z-axis direction when rotating. Accordingly, the tangential direction is the direction in which the radiation detection assembly 140 is located and is parallel to the X-axis, and the radial direction is the Y-axis. The tangential direction of movement of the radiation detection assembly 140 is the X-axis direction. That is, in FIG. 2, the radiation detection assembly 140 can be moved left and right relative to the radiation emitting assembly.

Referring to fig. 1 to 4, when the radiation detection assembly 140 moves to the left relative to the radiation emitting assembly, a field of view formed by the radiation detection assembly 140 and the radiation emitting assembly corresponds to a certain region of the scanned object 200, the radiation emitting assembly emits X-rays to the scanned object 200, the X-rays pass through the scanned object 200 and are projected onto the radiation detection assembly 140, at this time, the radiation detection assembly 140 receives a radiation signal of the certain region of the scanned object 200, processes the image and obtains image information of the corresponding region of the scanned object 200, that is, first image information. Then the radiation detection component 140 moves to the right relative to the radiation emission component, the field of view formed by the radiation detection component 140 and the radiation emission component corresponds to another region of the scanned object 200, the radiation emission component emits X-rays to the scanned object 200, the X-rays pass through the scanned object 200 and are projected on the radiation detection component 140, at this time, the radiation detection component 140 receives a radiation signal of another region of the scanned object 200, the image is processed, and image information of the region corresponding to the scanned object 200 is obtained, namely second image information.

The external controller may fuse the first image information and the second image information to generate the whole image information of the scanned object 200. Thus, the scanning field of view (FOV) of the radiation detection assembly 140 can be enlarged, and the scanning range of the scanned object 200 is enlarged, so that complete image information of the scanned object 200 is obtained, the diagnostic accuracy of an operator is ensured, and omission is avoided. Of course, in other embodiments of the present invention, the radiation detection assembly 140 may be moved three or more times relative to the radiation emitting assembly, which may further enlarge the scanning field of view of the radiation detection assembly 140. Optionally, the radiation emitting assembly includes a radiation source 130, and X-rays are emitted through the radiation source 130 to irradiate the scanned object 200. The radiation detecting assembly 140 includes a radiation detector 141, and the radiation detector 141 is disposed in a flat plate shape for receiving the X-rays passing through the scanned object 200.

Moreover, when the radiation detection assembly 140 moves along the X-axis direction, the center of gravity of the rotating substrate 120 deviates from the center of rotation, and thus the rotating substrate 120 is unbalanced, which affects the accuracy of imaging the scanned object 200 and the performance of the apparatus. Therefore, the counterweight assembly 150 is added on the rotating base plate 120 of the automatic balancing device 100 of the present invention, and the counterweight assembly 150 can move on the rotating base plate 120, so that the center of gravity of the rotating base plate 120 coincides with the center of rotation to achieve dynamic balance, thereby achieving the purpose of automatically performing balance adjustment on the rotating base plate 120, ensuring that the rotating base plate 120 and various components thereon rotate stably, and improving the rotation stability of the automatic balancing device 100.

With the automatic balancing apparatus 100 of the above embodiment, the radiation emitting component emits the radiation to pass through the scanned object 200, and then the radiation detecting component 140 can be projected on the radiation detecting component 140, and the radiation detecting component 140 can move along the tangential direction of the rotation of the rotating substrate 120, and the rotating substrate 120 is dynamically balanced by the counterweight component 150. The ray detection assembly 140 has a plurality of scanning fields in the process of moving along the tangential direction, and the plurality of scanning fields can be overlapped and fused to obtain integral image information, so that the problem of narrow scanning range image range caused by single scanning range of the existing balancing device is effectively solved, the scanning range of the automatic balancing device 100 is expanded, and the imaging area of the scanned object 200 is increased.

Optionally, the base 110 includes a mounting seat and a supporting plate disposed on the mounting seat. The mounting seat is used for mounting and fixing the automatic balancing device 100, so that the automatic balancing device 100 can be stably mounted in the cylinder, and the base 110 is prevented from shaking when the rotating substrate 120 rotates. The support plate is used to rotatably couple the rotating base plate 120. Alternatively, the rotating base plate 120 may be directly connected to the support plate. Illustratively, the center of the rotating base plate 120 is directly rotatably mounted to the support plate by a rotatable connection such as a spindle. Of course, in other embodiments of the present invention, the surface of the rotating substrate 120 facing away from the radiation detecting assembly 140 may be further provided with a mounting bracket, and the mounting bracket may be rotatably mounted on the supporting plate through a rotatable connecting member such as a rotating shaft.

Optionally, the automatic balancing apparatus 100 further includes a controller electrically connected to the radiation detecting assembly 140, the radiation emitting assembly, the counterweight assembly 150, and the like, the controller controlling the radiation detecting assembly 140 to move and receive the radiation signal, controlling the radiation emitting assembly to emit the radiation, controlling the counterweight assembly 150 to move to adjust the dynamic balance of the rotating substrate 120, and the like.

In an embodiment, the radiation detecting assembly 140 includes a first driving unit 142 and a radiation detector 141 connected to the first driving unit 142, and the first driving unit 142 drives the radiation detector 141 to move in a tangential direction. The ray detector 141 is connected to an output end of the first driving unit 142, and the first driving unit 142 is a power source for linear motion and can output power for linear motion to drive the ray detector 141 to move along the X-axis direction, thereby achieving the purpose of adjusting the scanning field of view. Illustratively, the first driving unit 142 is a stepping motor. Of course, in other embodiments of the present invention, the first driving unit 142 may also be a telescopic motor, a rotary motor and ball screw structure, or other structures capable of outputting linear motion. Alternatively, the first driving unit 142 may be directly mounted on the surface of the rotating substrate 120 or indirectly mounted on the surface of the rotating substrate 120.

In an embodiment, the automatic balancing device 100 can adjust the geometric amplification ratio of the self-checking of the ray emission component and the ray detection component 140, further adjust the imaging pixels of the ray detection component 140, adjust the imaging precision according to different use conditions, ensure that the imaging result is clear, and facilitate the diagnosis of operators. It is understood that the radial displacement of the radiation detecting assembly 140 can be adjusted independently, the radial displacement of the radiation emitting assembly can be adjusted independently, and the radial displacements of the radiation detecting assembly 140 and the radiation emitting assembly can be adjusted simultaneously.

Optionally, the radiation detection assembly 140 is movable in a radial direction. That is, the ray detection assembly 140 can move vertically along the Y-axis direction, so that the geometric magnification ratio of the automatic balancing device 100 can be adjusted, and further the imaging pixels of the ray detection assembly 140 can be adjusted, thereby achieving the purpose of adjusting the image imaging information display effect. That is, the radiation detection module 140 may move along the X-axis direction or the Y-axis direction.

Further, the radiation detection assembly 140 further includes a second driving unit, the second driving unit is connected to the first driving unit 142, and the second driving unit drives the first driving unit 142 and the radiation detector 141 to move along the radial direction. The output end of the second driving unit is connected to the first driving unit 142, and the second driving unit is a power source for linear motion and can output power of the linear motion to drive the second driving unit to move along the Y-axis direction, so as to achieve the purpose of adjusting the geometric amplification ratio. Exemplarily, the second driving unit is a stepping motor. Of course, in other embodiments of the present invention, the second driving unit may also be a telescopic motor, a rotating motor and ball screw structure, or other structures capable of outputting linear motion. Alternatively, the second driving unit may be directly mounted on the surface of the rotating substrate 120 or indirectly mounted on the surface of the rotating substrate 120.

Optionally, the radiation emitting assembly is movable in a radial direction. That is, the radiation emitting assembly can vertically move along the Y-axis direction, so that the geometric magnification ratio of the automatic balancing device 100 can be adjusted, and further the imaging pixels of the radiation detecting assembly 140 can be adjusted, thereby achieving the purpose of adjusting the image imaging information display effect. Further, the radiation emitting assembly includes a third driving unit and a radiation source 130 disposed on the third driving unit, and the third driving assembly drives the radiation source 130 to move along the tangential direction. The output end of the third driving unit is connected to the radiation source 130, and the third driving unit is a power source for linear motion and can output power for linear motion to drive the radiation source 130 to move along the Y-axis direction, so as to achieve the purpose of adjusting the geometric magnification ratio. Exemplarily, the third driving unit is a stepping motor. Of course, in other embodiments of the present invention, the third driving unit may also be a telescopic motor, a rotary motor and ball screw structure, or other structures capable of outputting linear motion. Alternatively, the third driving unit may be directly mounted on the surface of the rotating substrate 120 or indirectly mounted on the surface of the rotating substrate 120.

Optionally, the radiation detection assembly 140 and the radiation emitting assembly are both movable in a radial direction. That is, the radiation detecting assembly 140 may be moved in a radial direction, and the radiation emitting assembly may also be moved in a radial direction. Moreover, the radiation detection module 140 and the radiation emitting module may be moved radially, such as moving the radiation detection module 140 first and then moving the radiation emitting module, or moving the radiation emitting module first and then moving the radiation detection module 140; of course, the radiation detecting component 140 and the radiation emitting component can also move simultaneously, for example, the controller controls the radiation detecting component 140 and the radiation emitting component to move synchronously, or the radiation detecting component 140 and the radiation emitting component are driven to move simultaneously through the middleware.

It should be noted that the respective radial movement and the synchronous movement of the radiation detection assembly 140 can be realized by the second driving unit of the radiation detection assembly 140 and the third driving unit of the radiation source 130 in the above embodiments, and the controller can control the second driving unit or the third driving unit to move respectively or synchronously, which is not described herein again, and only the structure that the radiation detection assembly 140 and the radiation emitting assembly are driven to move simultaneously by the middleware is described herein.

Optionally, the automatic balancing apparatus 100 further includes a radial moving assembly 160, and the radial moving assembly 160 is relatively installed on the radiation emitting assembly and the radiation detecting assembly 140, and can drive the radiation emitting assembly and the radiation detecting assembly 140 to move in the radial direction. The radial moving assembly 160 is movably disposed on the rotating substrate 120. The radial moving assembly 160 has a radiation emitting assembly and a radiation detecting assembly 140 disposed opposite to each other. When the radial moving component 160 moves along the radial direction, i.e. along the Y-axis direction, the radial moving component 160 can drive the radiation emitting component and the radiation detecting component 140 to move along the Y-axis direction synchronously, so as to achieve the purpose of adjusting the geometric amplification ratio.

Further, the radial moving assembly 160 includes a radial driving unit 161 and a radial substrate 162 connected to the radial driving unit 161, the radial substrate 162 is opposite to the radiation emitting assembly and the radiation detecting assembly 140, and the radial driving unit 161 can drive the radial substrate 162 to move in the radial direction and drive the radiation emitting assembly and the radiation detecting assembly 140 to move in the radial direction. The output end of the radial driving unit 161 is connected to the radial substrate 162, and the radial driving unit 161 is a power source for linear motion and can output power of linear motion to drive the radial substrate 162 to move along the Y-axis direction, so as to achieve the purpose of adjusting the geometric amplification ratio. Illustratively, the radial drive unit 161 is a stepper motor. Of course, in other embodiments of the present invention, the radial driving unit 161 may also be a telescopic motor, a rotary motor and ball screw structure, or other structures capable of outputting linear motion. Alternatively, the radial driving unit 161 may be directly mounted on the surface of the rotating substrate 120 or indirectly mounted on the surface of the rotating substrate 120.

In one embodiment, each of the weight assemblies 150 includes at least one weight block 151 and a fourth driving unit 152 connected to the corresponding weight block 151, and the weight blocks 151 of the two weight assemblies 150 are symmetrically disposed on the rotating substrate 120 with the radial direction as a symmetry line. And the weights 151 of the two weight assemblies 150 are both disposed to be inclined with respect to the radial direction, and the fourth driving unit 152 drives the corresponding weight 151 to move, so as to adjust the balance of the automatic balancing apparatus 100.

The two counterweight assemblies 150 are located at two sides of the connection line between the radiation detection assembly 140 and the radiation emitting assembly, and the fourth driving unit 152 drives the corresponding counterweight block 151 to move so as to balance the rotating substrate 120. The output end of the fourth driving unit 152 is connected to the corresponding weight block 151, and the fourth driving unit 152 is a power source for linear motion and can output power for linear motion to drive the weight block 151 to move, thereby achieving the purpose of adjusting balance. Illustratively, the fourth driving unit 152 is a stepping motor. Of course, in other embodiments of the present invention, the fourth driving unit 152 may also be a telescopic motor, a rotary motor and ball screw structure, or other structures capable of outputting linear motion. Alternatively, the fourth driving unit 152 may be directly mounted on the surface of the rotating substrate 120 or indirectly mounted on the surface of the rotating substrate 120.

The two counter weights 151 and the corresponding fourth driving units 152 are symmetrically arranged along the Y-axis direction. Moreover, the rotating substrate 120 has a track for movably mounting the weight block 151, so as to ensure the accurate movement track of the weight block 151, and further ensure the dynamic balance of the rotating substrate 120. The counterweights 151 of both weight assemblies 150 are arranged obliquely with respect to the radial direction. Alternatively, the range of the angle α between the weight block 151 and the X-axis direction is 0 ° < α < 90 °, which facilitates the adjustment of the weight block 151 and the dynamic balance of the rotating base plate 120. Further, the range of the included angle alpha between the balancing weight 151 and the X-axis direction is more than or equal to 30 degrees and less than or equal to 60 degrees.

Specifically, the automatic balancing apparatus 100 adjusts the automatic balancing as follows:

as shown in fig. 5, the X-axis direction and the Y-axis direction are fixedly connected to the rotating substrate 120, and displacement information of the radiation emitting assembly and the radiation detecting assembly 140 after adjusting the relative positions of the radiation emitting assembly and the radiation detecting assembly 140 when the rotating substrate 120 is in a working motion state is obtained; then, the moving distance and the moving direction of the weight assembly 150 are calculated according to the obtained displacement information of the radiation emitting assembly and the radiation detecting assembly 140. It can be understood that the automatic balancing apparatus 100 easily adjusts the balance of the rotating base plate 120 in an initial state by a counter weight method. When the automatic balancing apparatus 100 adjusts the geometric magnification ratio, the radiation source 130 and the radiation detector 141 move simultaneously or one of them moves in the Y-axis direction, and the radiation detector 141 is shifted in the Y-axis direction to collect X-ray information passing through the scanned object 200, so as to expand the scanning range.

It is assumed that the moving parts of the radiation source 130 and the radiation detector 141 have masses W3 and W4, respectively, and the displacements in the Y-axis direction are dy3 and dy4, respectively, and the displacement of the radiation detector 141 in the x-axis direction is dx 4; the masses of the two weights 151 are W5 and W5', respectively, and define that the two weights 151 are displaced obliquely upward as positive displacements. In the state that the rotating base plate 120 is adjusted to be balanced again after the radiation source 130 and the radiation detector 141 are moved, the positions where the two weights 151 need to be moved are d5 and d 5', respectively.

The third driving unit drives the radiation source 130 to move dy3 downwards in the Y-axis direction, the second driving unit drives the radiation detector 141 to move dy4 downwards in the Y-axis direction, and at the same time, the first driving unit 142 drives the radiation detector 141 to move dx4 to the right in the X-axis direction, to the position shown in fig. 6.

The static balance requirement is reached again by the following relationship:

W4×dx4+d5×W5×cosα-d5’×W5’×cosα＝0

W3×dy3+W4×dy4+d5·W5×sinα+d5’×W5’×sinα＝0

and calculating to obtain:

d5＝-(W3×dy3+W4×dy4)/2×sinα-W4×dx4/W5×cosα

d5’＝(W4×dx4×tanα-W3×dy3-W4×dy4)/(2×W5’×sinα)

subsequently, the controller controls the fourth driving unit 152 to drive the corresponding weight block 151 to move according to the calculated distance and direction, i.e., the displacement of d5 and d 5', so as to adjust the balance of the rotating substrate 120, so that the automatic balancing device can reach the balance again without stopping the machine, thereby ensuring the rotating stability of the rotating substrate 120 and further ensuring the accuracy of the imaging result.

The present invention further provides an automatic balancing method, which is applied to the automatic balancing apparatus 100 in the above embodiment, and the automatic balancing method includes the following steps:

acquiring displacement information of the ray emission assembly and the ray detection assembly 140 after adjusting the relative positions of the ray emission assembly and the ray detection assembly 140 when the rotary substrate 120 is in a working motion state;

calculating the moving distance and the moving direction of the counterweight component 150 according to the obtained displacement information of the ray emitting component and the ray detecting component 140;

the weight assembly 150 is automatically adjusted according to the calculated distance and the moving direction so that the automatic balancing apparatus 100 can reach balance again without stopping.

The static balance requirement is reached again by the following relationship:

W4×dx4+d5×W5×cosα-d5’×W5’×cosα＝0

W3×dy3+W4×dy4+d5·W5×sinα+d5’×W5’×sinα＝0

and calculating to obtain:

d5＝-(W3×dy3+W4×dy4)/2×sinα-W4×dx4/W5×cosα

d5’＝(W4×dx4×tanα-W3×dy3-W4×dy4)/(2×W5’×sinα)

The invention also provides a tomography device which comprises a cylinder, a scanning bed and the automatic balancing device 100 in the embodiment, wherein the automatic balancing device 100 is arranged in the cylinder. The barrel is specifically used for a scanning cavity of scanning, the scanning object 200 is located on a scanning bed and can move into the scanning cavity along with the scanning bed, and the scanning object 200 is imaged by the ray emitting assembly and the ray detecting assembly 140 of the automatic balancing device 100. After the automatic balancing device 100 of the above embodiment is adopted by the tomography apparatus of the present invention, the rotation balance adjustment of the rotating substrate 120 is realized, and at the same time, the tomography apparatus may have a plurality of scanning fields, which may be overlapped and fused to obtain the whole image information of the scanned object 200, so as to expand the scanning field of the automatic balancing device 100, increase the imaging area of the scanned object 200, and facilitate the diagnosis of the operator; moreover, the adjustment of geometric amplification ratio can be realized, and the use requirements of different working conditions are met.

The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An automatic balancing device, comprising: base, rotating base plate, ray emission subassembly, ray detection subassembly and two counter weight subassemblies, the rotatable setting of rotating base plate, just radial direction and perpendicular to have on the rotating base plate the tangential direction of radial direction, ray emission subassembly with the ray detection subassembly is followed radial direction install relatively in rotating base plate, just the ray detection subassembly can be followed the tangential direction removes, two the counter weight subassembly with radial direction sets up for the line of symmetry in on the rotating base plate, just the counter weight subassembly for the radial direction slope sets up.

2. The automatic balancing device of claim 1, wherein the radiation detecting assembly comprises a first driving unit and a radiation detector connected to the first driving unit, the first driving unit driving the radiation detector to move along the tangential direction.

3. The automatic balancing device of claim 2, wherein the detection assembly is movable in the radial direction.

4. The automatic balancing device of claim 2, wherein the radiation emitting assembly comprises a third driving unit and a radiation source disposed on the third driving unit, and the third driving unit drives the radiation source to move along the radial direction.

5. The automatic balancing device of claim 2, wherein the radiation detection assembly and the radiation emitting assembly are both movable in the radial direction.

6. The automatic balancing device of claim 5, further comprising a radial moving assembly, wherein the radial moving assembly is mounted on the radial moving assembly, and the radial moving assembly drives the radiation emitting assembly and the radiation detecting assembly to move along the radial direction.

7. The automatic balancing device of claim 5, wherein the radial moving assembly comprises a radial driving unit and a radial substrate connected to the radial driving unit, the radial substrate is opposite to the radiation emitting assembly and the radiation detecting assembly, and the radial driving unit can drive the radial substrate to move along the radial direction and drive the radiation emitting assembly and the radiation detecting assembly to move along the radial direction.

8. The automatic balancing device of claim 5, wherein the radiation detecting assembly further comprises a second driving unit, and the second driving unit drives the first driving unit and the radiation detector to move along the radial direction;

9. The automatic balancing device of any one of claims 1 to 8, wherein each of the weight assemblies includes at least one weight block and a fourth driving unit connected to the weight block, the weight blocks of two weight assemblies are symmetrically disposed on the rotating base plate with the radial direction as a symmetry line, the weight blocks of two weight assemblies are each disposed obliquely with respect to the radial direction, and the fourth driving unit drives the corresponding weight block to move so as to adjust the balance of the automatic balancing device.

10. An automatic balancing method applied to the automatic balancing apparatus according to any one of claims 1 to 9, comprising the steps of:

11. A tomographic imaging apparatus comprising a barrel and the automatic balancing device according to any one of claims 1 to 9, said automatic balancing device being provided in said barrel.