CN113031042B - Ray calibration device and method - Google Patents
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- CN113031042B CN113031042B CN201911361554.3A CN201911361554A CN113031042B CN 113031042 B CN113031042 B CN 113031042B CN 201911361554 A CN201911361554 A CN 201911361554A CN 113031042 B CN113031042 B CN 113031042B
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- 230000005855 radiation Effects 0.000 claims abstract description 111
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T7/00—Details of radiation-measuring instruments
- G01T7/005—Details of radiation-measuring instruments calibration techniques
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Abstract
Embodiments of the present disclosure provide a radiation calibration apparatus and method. The device comprises: the device comprises a motion platform and two calibration assemblies arranged on the motion platform. Each calibration assembly has a plurality of calibration samples. The radiation calibration device is capable of translating and/or rotating the at least one calibration assembly so as to allow a combination of a plurality of calibration samples to be directed against radiation in each direction while calibrating the radiant energy of the radiation in a plurality of directions of the radiation source.
Description
Technical Field
The invention relates to the field of ray calibration, in particular to a ray calibration device and a ray calibration method.
Background
The security inspection systems currently in common use a variety of radiation sources, such as X-ray sources, which are capable of providing radiation by which a two-dimensional or even three-dimensional image of the cargo can be obtained by irradiating the cargo with radiation.
The radiation source used for security inspection needs to be calibrated in the maintenance period before and after delivery, namely, the reconstructed image value and the actual value of the workpiece are compared by scanning the workpiece of a specific material, and the final calibration parameter is determined so as to obtain a reliable image value.
In practical application, a reliable calibration device convenient to operate is needed.
Disclosure of Invention
An embodiment of the present disclosure provides a radiation calibration device, including:
a motion platform;
at least one calibration assembly mounted on the motion platform, each calibration assembly having a plurality of calibration samples;
wherein the motion stage is capable of translating and/or rotating the at least one calibration assembly so as to allow a combination of a plurality of calibration samples to be directed against radiation in each direction when the radiation calibration device is calibrating the radiant energy of the radiation in a plurality of directions of the radiation source.
In one embodiment, each of the plurality of calibration samples of each calibration assembly is configured to have a set length and a transverse cross-section in a length direction has a stepped shape such that when the beam of radiation traverses different portions of one or more steps of the plurality of calibration samples, the thickness of the calibration sample traversed by the beam of radiation is different, thereby achieving calibration of different energy rays.
In one embodiment, each calibration assembly is configured such that each of the plurality of calibration samples is detachable in length into a plurality of sub-calibration sample segments.
In one embodiment, the at least one calibration assembly comprises a first calibration assembly comprising a plurality of first calibration samples and a second calibration assembly comprising a plurality of second calibration samples, one of the plurality of first calibration samples and/or one of the plurality of second calibration samples being capable of constituting a desired calibration combination by translation and/or rotation of the first calibration assembly and the second calibration assembly.
In one embodiment, the motion platform comprises a first translation portion and/or a second translation portion, each independently translatable in a first direction, the first calibration assembly being mounted on the first translation portion and the second calibration assembly being mounted on the second translation portion.
In one embodiment, the motion platform further comprises a swivel mount configured to rotatably mount the first translation portion and the second translation portion on the swivel mount.
In one embodiment, the motion platform further comprises a slide base, wherein the swivel base is reciprocally translatable on the slide base, the slide base being arranged along the first direction.
In one embodiment, the first translation portion includes a first translation rail mounted on the rotary base to extend in a first direction, a first translation stage mounted on the first translation rail to be translatable along the first translation rail, a first timing belt mounted on the rotary base at the first translation stage, and a first timing motor, wherein the first timing belt forms a loop and is driven by the first timing motor to reciprocally move the first translation stage in the first direction,
the second translation part comprises a second translation guide rail which is arranged on the rotary seat and extends along the first direction, a second translation table which is arranged on the second translation guide rail and can translate along the second translation guide rail, a second synchronous belt which is arranged on the rotary seat and positioned on the second translation table, and a second synchronous motor, wherein the second synchronous belt forms a loop and is driven by the second synchronous motor so as to reciprocally move the second translation table along the first direction.
In one embodiment, the swivel base comprises: the translation base is arranged on the sliding rail base and used for sliding back and forth on the sliding rail base; the rotary table comprises an upper bearing plate and a lower transmission seat, wherein the transmission mechanism comprises a transmission worm arranged on the translation base and a transmission turbine arranged on the lower transmission seat of the rotary table, and the transmission worm is engaged with the corresponding transmission turbine so that the transmission worm rotates under the drive of the rotary driving motor, thereby driving the rotary table to rotate.
In one embodiment, the ray calibration apparatus further comprises a calibration frame mounted on the rotary base, upper ends of the plurality of first calibration samples of the first calibration assembly and the plurality of second calibration samples of the second calibration assembly are slidably connected to an upper slide rail of an upper portion of the calibration frame, and lower ends of the plurality of first calibration samples of the first calibration assembly and the plurality of second calibration samples of the second calibration assembly are mounted on the first translation portion and the second translation portion, respectively.
In one embodiment, a motion platform comprises:
a rotating seat;
the first translation part is arranged on the rotating seat and can translate along a first direction;
the first calibration assembly is installed on the first translation part, and the second calibration assembly is installed on the rotating seat.
In one embodiment, the swivel base comprises: the translation base is arranged on the sliding rail base and used for sliding back and forth on the sliding rail base; the rotary table comprises an upper bearing plate and a lower transmission seat, wherein the transmission mechanism comprises a transmission worm arranged on the translation base and a transmission turbine arranged on the lower transmission seat of the rotary table, and the transmission worm is engaged with the corresponding transmission turbine on the lower transmission seat of the rotary table so that the transmission worm rotates under the drive of the rotary driving motor, thereby driving the rotary table to rotate.
In one embodiment, the ray calibration apparatus further comprises a calibration frame mounted on the rotating base, upper ends of the plurality of first calibration samples of the first calibration assembly and the plurality of second calibration samples of the second calibration assembly are slidably connected to an upper slide rail of an upper portion of the calibration frame, lower ends of the plurality of first calibration samples of the first calibration assembly are mounted on the first translation portion, and lower ends of the plurality of second calibration samples of the second calibration assembly are mounted on the rotating base.
In one embodiment, the motion platform further comprises:
the sliding rail base is provided with a first translation part and a second translation part; and
the first calibration assembly is mounted on the first rotating portion of the first translation portion, and the second calibration assembly is mounted on the second rotating portion of the second translation portion.
In one embodiment, the radiation targeting device further includes a first sub-targeting frame mounted on the first rotating portion and a second sub-targeting frame mounted on the second rotating portion,
the upper ends of a plurality of first calibration samples of the first calibration assembly are slidably connected to a first sub-calibration frame upper sliding rail at the upper part of the first sub-calibration frame, and the lower ends of the plurality of first calibration samples are mounted on the first rotating part;
the upper ends of a plurality of second calibration samples of the second calibration assembly are slidably connected to the second sub-calibration frame upper slide rail at the upper part of the second sub-calibration frame, and the lower ends of the plurality of second calibration samples are mounted on the second rotating part.
The embodiment of the disclosure also provides a ray calibration method using the ray calibration device, which comprises the following steps:
the radiation source to be calibrated is positioned at one side of the slide rail base of the ray calibration equipment;
translating the first calibration assembly and the second calibration assembly through the motion platform, so that the radiation source emits rays towards the first calibration assembly and the second calibration assembly;
wherein, according to the calibration needs, a combination of one of a plurality of first calibration samples of the first calibration assembly and one of a plurality of second calibration samples of the second calibration assembly is obtained.
In one embodiment, the ray calibration method further comprises: translating and rotating the first and second calibration assemblies to calibrate radiation in other directions in the radiation beam emitted by the radiation source using a combination of the obtained one of the plurality of first calibration samples of the first calibration assembly and one of the plurality of second calibration samples of the second calibration assembly.
In one embodiment, the ray calibration method further comprises: and placing a plurality of radiation sources on one side of a slide rail base of the ray calibration device, and arranging sub calibration sample sections respectively corresponding to the first calibration assembly and the second calibration assembly along the vertical direction so as to calibrate each radiation source.
Drawings
FIG. 1 is a schematic perspective view of a ray calibration apparatus according to one embodiment of the present disclosure;
FIG. 2 is a schematic top view of a swivel mount of a motion platform of a radiation calibration apparatus according to one embodiment of the disclosure;
FIG. 3 is a schematic partial perspective view of an upper portion of a ray calibration apparatus according to one embodiment of the present disclosure;
FIG. 4 is a perspective schematic view of a swivel mount of a radiation calibration device according to one embodiment of the present disclosure;
FIG. 5 is a perspective schematic view of a skid base of a radiation calibration device according to one embodiment of the present disclosure;
FIG. 6 is a perspective schematic view of a ray casting apparatus according to another embodiment of the present disclosure, with the first and second sub-casting frames removed.
Detailed Description
Embodiments of the present disclosure provide a radiation calibration device, as shown in fig. 1, including a motion platform and a calibration assembly that implements translation and rotation through the motion platform. As shown in fig. 1, the radiation calibration device comprises a first calibration assembly 21 and a second calibration assembly 22. With continued reference to FIG. 2, the first calibration assembly 21 includes a plurality of first calibration samples, such as three first calibration samples 21-1, 21-2, 21-3 shown; the second calibration assembly 22 includes a plurality of second calibration samples, such as three second calibration samples 22-1, 22-2, 22-3 shown. In this embodiment, the first calibration assembly 21 and the second calibration assembly 22 are capable of translating and rotating via the motion platform such that one of the plurality of first calibration samples 21-1, 21-2, 21-3 and one of the plurality of second calibration samples 22-1, 22-2, 22-3 are capable of forming a desired calibration combination via translation and/or rotation of the first calibration assembly 21 and the second calibration assembly 22. For example, a first calibration sample of the first calibration assembly 21 may be combined with a first calibration sample of the second calibration assembly 22 to calibrate a particular radiation. For example, in the embodiment of the drawings, the first calibration assembly 21 comprises three first calibration samples 21-1, 21-2, 21-3 and the second calibration assembly 22 comprises three second calibration samples 22-1, 22-2, 22-3, which can theoretically be combined to form at least 16 first calibration sample-second calibration sample combinations. In practice, when setting up the calibration samples, a limited number of specific calibration samples can be set according to the actual needs and the energy of the radiation source, and more than 10 calibration sample combinations are sufficient to meet the needs in the actual work. Of course, the first and second calibration assemblies 22 may each include other numbers of calibration samples, such as four, five, or six calibration samples or even more calibration samples; in other embodiments of the present disclosure, the number of first calibration samples of the first calibration assembly 21 and the number of second calibration samples of the second calibration assembly 22 may be different, for example, three first calibration samples are included in the first calibration assembly 21 and five second calibration samples are included in the second calibration assembly 22; the number of calibration samples and the parameters of the materials, thicknesses, etc. of the calibration samples of the first calibration assembly 21 and the second calibration assembly 22 may be set according to actual needs. Therefore, in practical application, the embodiment can realize the movement of the calibration assembly through the motion platform, and the process of manually adjusting the calibration sample to realize the calibration is eliminated, so that the safety is improved, and the operation is convenient.
In the embodiment shown in fig. 1 and 2, each calibration sample of each calibration assembly is provided to have a set length (as shown in the figures as height) and a transverse cross-section in the length direction has a stepped shape on one side and may be planar on the other side. Alternatively, the shape of each calibration sample can be basically seen as a plate having a certain length, and the transverse cross section of the plate in the length direction is not rectangular (because the rectangle is only one thickness, the application is limited), but has a stepped shape with various thicknesses. The arrangement is such that the calibration sample actually has a plurality of sections, each section having a lateral thickness, each lateral thickness being capable of being used to calibrate the radiation of one energy, whereby one calibration sample is capable of calibrating a plurality of radiant energies. Thus, according to the present embodiment, the first and second calibration assemblies 22 can constitute a plurality of first calibration sample-second calibration sample combinations, and at the same time, one first calibration sample-second calibration sample combination can provide a plurality of calibration thickness combinations, so that the radiation calibration device can provide tens of calibration thickness combinations, thereby greatly improving the calibration adaptability.
During actual calibration, the beam of radiation generally follows a side of the plane facing the plate-shaped calibration sample, and traverses a stepped portion of a calibration sample. According to this embodiment, the first calibration assembly 21 and/or the second calibration assembly 22 are translated and/or rotated, e.g. the first calibration assembly 21 is moved to the radiation beam, such that the radiation beam is directed against one side of the plane of the first calibration sample of the second calibration assembly 22, which is directed against the radiation beam in the horizontal direction, after rotation, through the first stepped portion of the first calibration sample. If it is desired that the radiation beam passes through a second stepped portion of the first calibration sample, the first calibration assembly 21 may be translated so that the second stepped portion of the first calibration sample is moved to the position of the original first stepped portion, the radiation beam may be directed against the second stepped portion; if it is desired to index the radiation beam using the third stepped portion, the first indexing assembly 2l may continue to translate such that one side of the plane of the third stepped portion faces the radiation beam. If the first calibration assembly 21 is translated to the radiation beam attachment, however, one side of the plane of the first calibration sample of the first calibration assembly 21 is not facing the radiation beam, the first calibration assembly 21 may be rotated by the motion stage such that the predetermined stepped portion of the first calibration sample of the first calibration assembly 21 is facing the direction of propagation of the radiation beam. Here, parameters such as calibration material, thickness, and corresponding calibration distance may be determined according to the knowledge of the skilled in the art, and will not be discussed. Since in this embodiment the radiation calibration device is configured with a motion platform to effect translation and/or rotation of the first and second calibration assemblies 22 as desired, the calibration thickness can be conveniently adjusted non-manually.
In one embodiment of the present disclosure, each calibration assembly is configured such that each of the plurality of calibration samples is detachable in length into a plurality of sub-calibration sample segments. Specifically, the first calibration sample of the first calibration assembly 21 has a certain length and is configured to be formed by combining a plurality of first sub-calibration samples. For example, the first calibration sample includes three first sub-calibration samples, so that each first sub-calibration sample has a small length and is convenient to transport. The connection between the plurality of first sub-calibration samples may be by plugging or the like. All calibration samples of the first calibration assembly 21 and the second calibration assembly 22 may have detachable sub-calibration samples. Since each calibration sample may be provided with a plurality of sub-calibration samples, it may allow the first calibration assembly 21 and the second calibration assembly 22 to have a longer length, which is advantageous in that the radiant energy of a plurality of radiation sources may be calibrated simultaneously in the length direction along the first calibration assembly 21 and the second calibration assembly 22, which improves the adaptability of the radiation calibration device.
The following provides a number of embodiments of the present disclosure to specifically illustrate the present disclosure.
Fig. 1-4 illustrate one embodiment. For example, as shown in fig. 1, the radiation calibration device of the present disclosure is generally divided into an upper calibration assembly for calibration and a lower motion platform, which is for illustration only, and those skilled in the art will appreciate the radiation calibration device of the present disclosure in other combinations. The motion platform comprises a first translation part and a second translation part which can translate along a first direction respectively, the first calibration assembly 21 is installed on the first translation part, and the second calibration assembly 22 is installed on the second translation part. Since the first translation part has various embodiments and comprises a plurality of components, no reference numerals are given.
In one embodiment of the present disclosure, the motion platform includes a first translation portion capable of translating alone in a first direction, the first calibration assembly 21 being mounted on the first translation portion; in this embodiment, the second translating portion is not included.
In another embodiment of the present disclosure, the motion platform includes a second translation portion that is independently translatable in the first direction, and the second calibration assembly 22 is mounted on the second translation portion. In this embodiment, the first translating portion is not included.
In the embodiment of fig. 1-4, the motion platform further comprises a swivel base 30, the first translation portion and the second translation portion being mounted on the swivel base 30, the swivel base 30 being configured to rotatably mount the first translation portion and the second translation portion on the swivel base 30. In the present embodiment, the rotation seat 30 is capable of simultaneously rotating the first translation portion and the second translation portion mounted on the rotation seat 30, in other words, the first translation portion and the second translation portion are not capable of relative rotation but are capable of relative translation, so that each first calibration sample of the first calibration assembly 21 on the first translation portion can be combined with each second calibration sample of the second calibration assembly 22 on the second translation portion, respectively, by the translation of the first translation portion. In practice, the rotating seat 30 rotates the first translation part and the second translation part so that one side of the plane of the first calibration sample of the first calibration assembly 21 on the first translation part faces the radiation beam, and then the first translation part and the second translation part translate the combination of one of the first calibration sample and one of the second calibration sample, respectively, to perform calibration of the radiation beam. In the above embodiment in which only one translation is provided, either the first translation or the second translation is provided on the rotary seat 30, the corresponding calibration assembly being mounted on the corresponding translation and the other calibration assembly being mounted on the rotary seat.
The motion platform further comprises a slide base 40, the swivel base 30 being capable of reciprocal translation on the slide base 40, the slide base 40 being arranged in a first direction. Through the slide rail base 40, the rotating base 30 is mounted on the first translation portion and the second translation portion and can translate along the slide rail base 40 as a whole. Such an arrangement is advantageous in that, when calibrating the radiation source, only the radiation source needs to be brought close to the slide base 40 of the radiation calibration device, the first calibration assembly 21 and the second calibration assembly 22 can be moved to the radiation source by the translation of the rotating base 30, the first calibration sample of the first calibration assembly 21 and the second calibration assembly 22 of the second calibration assembly 22 are allowed to face the radiation beam simultaneously by the rotation of the rotating base 30, the calibration process is easy and fast, and the safety can be improved.
The structures of the first translating portion and the second translating portion are specifically described below, however, the present disclosure is not limited to the structures of the first translating portion and the second translating portion described herein, and other structures that allow for translation may also be applied. As shown in fig. 2, the first translation part includes a first translation guide 341-1 mounted on the rotation base 30 to extend in a first direction, a first translation stage 343-1 mounted on the first translation guide 341-1 to be translatable along the first translation guide, a first timing belt 342-1 mounted on the rotation base 30 at the first translation stage 343-1, and a first timing motor 344-1, the first timing belt 342-1 forming a loop (the lower side of the loop is blocked in fig. 2) and being driven by the first timing motor 344-1 to reciprocally move the second translation stage in the first direction. In the present embodiment, the first translation stage 343-1 is mounted on the first timing belt 342-1 constituting the loop or is connected in the loop as a part of the loop, and is driven by the first timing motor 344-1. The second translation part includes a second translation rail 341-2 mounted on the rotation base 30 to extend in the first direction, a second translation stage 343-2 mounted on the second translation rail 241-2 to be translatable along the second translation rail 241-2, a second timing belt 342-2 mounted on the rotation base 30 at the second translation stage 343-2, and a second synchronous motor 344-2, wherein the second timing belt 342-2 loops and is driven by the second synchronous motor 344-2 to reciprocally move the second translation stage in the first direction. In the present embodiment, the second translation stage 343-2 is mounted on the second timing belt 342-2 constituting the loop or is connected in the loop as a part of the loop, and driven by the second synchronous motor 344-2, similarly to the arrangement of the first translation stage.
In other embodiments of the present disclosure, the first translation stage 343-1 and the second translation stage 343-2 can be driven in other driving manners. For example, the first translation part includes a first translation guide 341-1 mounted on the rotation seat 30 to extend in the first direction, a first translation stage 343-1 mounted on the first translation guide 341-1 to be translatable along the first translation guide, except that in the first translation part, a timing belt and a synchronous motor 3 are provided on both ends of the rotation seat 30 at the first translation stage 343-1 so that the first translation stage is cooperatively driven by two sets of timing belts and synchronous motors in the first translation part. The second translation part is similar and will not be described in detail.
In the above embodiment, the first translation guide 341-1 may be in the form of a double rail or a single rail, and fig. 2 shows the form of a double rail. The form shown in fig. 2 of pulling the first translation stage 343-1 and the second translation stage 343-2 by means of a timing belt can be replaced by other hard-wired forms, such as a screw-gear combination. When the first translation stage 343-1 and the second translation stage 343-2 are driven in a hard-wired manner, it is only necessary to configure a connection member at one side to connect the first translation stage 343-1 and the second translation stage 343-2.
In another embodiment of the present disclosure, only one translation portion may be provided, for example, only the first translation portion is included, the first calibration assembly 21 is mounted on the first translation portion, and the second calibration assembly 22 is mounted on the rotation seat 30, i.e., on the rotation table 32 of the rotation seat, so that only the first translation portion moves when the rotation seat 30 is not translated. This embodiment is also advantageous in that only one translation part is provided, so that the construction of the radiation calibration device is simplified and the calibration needs can be fulfilled, since the rotation seat 30 can translate on the slide base 40 (as will be described later), i.e. one of the first calibration assembly 2l and the second calibration assembly 22 (mounted on the rotation seat 30) can be brought close to the radiation beam, then the first calibration assembly 21 and the second calibration assembly 22 are rotated to face the radiation beam, and finally the first calibration assembly is translated to form the desired calibration sample combination, thus achieving the calibration. In this embodiment, the rotary base 30 is constructed identically to the embodiment shown in fig. 1-4.
In one embodiment, swivel base 30 comprises: a translation base 31 mounted on the slide base 40 for reciprocal sliding on the slide base 40; a rotary table 32 mounted on the translation base 31, and a transmission mechanism and a rotation driving motor 332 mounted on the translation base 31 for driving the rotary table 32 to rotate, wherein the rotary table 32 comprises an upper bearing plate 321 and a lower transmission seat 322, and the transmission mechanism comprises a transmission worm 331 mounted on the translation base 31 and a transmission turbine mounted on the lower transmission seat 322 of the rotary table 32; the driving worm 331 is engaged with a corresponding driving worm gear on the lower driving seat 322 of the rotary table 32 so that the driving worm 331 is rotated by the driving of the rotation driving motor 332, thereby driving the rotary table 32 to rotate. In this way, the rotating seat 30 can move, and the first translation part, the second translation part and other parts which are arranged on the rotating seat 30 can be rotated, so that the adaptability of the ray calibration equipment is greatly improved, the operation is convenient, and the calibration efficiency is improved; and the motor is used for allowing the ray calibration equipment to calibrate automatically, so that human injury caused by manual operation is avoided. The motor-worm wheel-worm mechanism in this embodiment may be replaced by a motor-reduction gear set mechanism to effect rotation of the rotary base 30.
Furthermore, as shown in fig. 1, the radiation calibration device further comprises a calibration frame mounted on the swivel base 30 for stability and safety of the first and second calibration assemblies 21, 22. In the embodiment shown in fig. 1-4, the lower end of the calibration frame is mounted on the swivel 30, and the lower ends of the plurality of first calibration samples of the first calibration assembly 21 and the plurality of second calibration samples of the second calibration assembly 22 are mounted on the first translation portion and the second translation portion, respectively; the upper ends of the plurality of first calibration samples of the first calibration assembly 21 and the plurality of second calibration samples of the second calibration assembly 22 are slidably connected to the upper slide rail 101 of the upper portion of the calibration frame, however, this is not required. The provision of the calibration frame may allow the plurality of first and second calibration samples to be stabilized from both upper and lower ends, so that the first and second calibration samples can be smoothly moved during the movement of the first and second translation portions, which is particularly advantageous for the first and second calibration samples having a large length. In addition, the calibration frame may prevent a housing or other foreign object of the radiation source from touching the first calibration sample and the second calibration sample. The calibration frame shown in fig. 1 is a four-sided frame structure, however, the two sides of the calibration frame in fig. 1 are not provided so as to not interfere with the extension of the first and second translating portions out of the dimensional range of the swivel base 30. The connection of the upper ends of the first and second calibration samples to the upper slide rail 101 of the upper part of the calibration frame may have various embodiments. Fig. 3 shows an embodiment in which the upper part of the calibration frame comprises two upper slide rails 10L, the upper end of the first calibration sample is provided with an L-shaped connector, a part of which is fixedly connected to the upper end of the first calibration sample, and the other part of which has a sliding member which slides on a corresponding one of the upper slide rails 101 of the calibration frame. The sliding piece can be sleeved with the upper sliding rail 101, so that the sliding piece can be limited to further limit the movement of the end part of the first calibration sample in the transverse direction of the upper sliding rail 101, and the stability of the first calibration sample is improved. The calibration frame may comprise three frame parts in the vertical direction as shown in fig. 1, so that the first calibration sample and the second calibration sample may be explicitly divided into three areas, each of which may be used for calibration of one radiation source.
Fig. 5 illustrates a sled base 40 of the present disclosure. The slide base 40 includes an adjustable base having a large length and two rails on the adjustable base. Due to the arrangement of the slide rail base 40, the ray calibration device can move in a larger length, or alternatively, a plurality of radiation sources can be allowed to be arranged in the length direction of the slide rail base 40 for calibration one by one; due to the provision of the slide base 40, the radiation marking device can be allowed to move over a larger length of the slide base 40, while also allowing the first and second translating portions of the radiation marking device to be fine-tuned over a shorter length on the first and second translating rails 341-1 and 341-2, respectively.
The slide base 40 may be provided with an adjustable foot so that adjustment of the adjustable foot keeps the two rails of the slide base 40 extending in a horizontal direction so that the swivel base 30 translates in a horizontal plane.
The slide base 40 may include a drive means to drive the swivel base 30 to translate on two rails.
Fig. 6 illustrates another embodiment of the present disclosure. In the embodiment shown in fig. 6, the motion platform comprises a first translation part 5-10 and a second translation part 5-11, respectively, capable of translating alone in a first direction, on which a first calibration assembly 21 is mounted, and on which a second calibration assembly 22 is mounted; unlike the embodiment of fig. 1-4, the first and second translating portions are mounted on the sled base 40. The slide base 40 may comprise driving means for driving the first translating part 5-10 and the second translating part 5-11 to translate on two rails. However, it is also possible that the first translation part 5-10 and the second translation part 5-11 comprise respective driving means, such as a motor and a wheel combination, respectively, the motor driving wheel rolling on the track. In this embodiment, the first translation 5-10 and the second translation 5-11 allow the first 21 and second 22 calibration assemblies, respectively, to translate individually over longer lengths.
The motion platform further comprises a first rotating part 5-12 mounted on the first translating part 5-10, and a second rotating part 5-13 mounted on the second translating part 5-11, the first calibration assembly 21 is mounted on the first rotating part 5-12 of the first translating part 5-10, and the second calibration assembly 22 is mounted on the second rotating part 5-13 of the second translating part 5-11.
In this embodiment, the motion platform can allow the first calibration assembly 21 and the second calibration assembly 22 to translate and rotate independently, and the operation is simple and the flexibility is high.
In the example shown in fig. 6, the radiation calibration device further comprises a first sub-calibration frame mounted on the first rotating part 5-12 and a second sub-calibration frame mounted on the second rotating part 5-13, wherein upper ends of the plurality of first calibration samples of the first calibration assembly 21 are slidably connected to the first sub-calibration frame upper slide rail 101 of the upper part of the first sub-calibration frame, and lower ends of the plurality of first calibration samples are mounted on the first rotating part 5-12; the upper ends of a plurality of second calibration samples of the second calibration assembly 22 are slidably connected to the second sub-calibration frame upper rail 101 of the upper portion of the second sub-calibration frame, and the lower ends of the plurality of second calibration samples are mounted on the second rotating parts 5-13. The first sub-calibration frame and the second sub-calibration frame are not shown in fig. 6, however, their construction is conceivable from the calibration frames in the previous embodiments, i.e. the aforementioned calibration frames are divided into two parts, one part being the first sub-calibration frame and the other part being the second sub-calibration frame.
In one embodiment of the present disclosure, there is provided a radiation calibration device including: a motion platform; and at least one calibration assembly mounted on the motion platform, each calibration assembly having a plurality of calibration samples. In this embodiment, the radiation calibration device is capable of translating and/or rotating the at least one calibration assembly so as to allow a combination of multiple calibration samples to be directed against radiation in each direction while calibrating the radiant energy of the radiation in multiple directions of the radiation source. According to the present embodiment, the number of calibration components of the radiation calibration device is not limited in practice, and may be one calibration component, three calibration components, four calibration components, etc., and the manner of construction thereof may be derived with reference to the foregoing embodiments of the present disclosure.
In one embodiment of the present disclosure, a radiation calibration method of the radiation calibration device described above is provided. For example, a ray calibration method using the ray calibration apparatus shown in fig. 1 to 4, the method comprising: so that the radiation source to be calibrated is located on one side of the slide rail base 40 of the radiation calibration device; subsequently, the first 21, second 22 calibration assembly is translated by the motion stage such that the radiation source emits radiation towards the first 21, second 22 calibration assembly. Depending on the calibration requirements, e.g. calculated or determined thickness of the calibration samples, a combination of one of the plurality of first calibration samples of the first calibration assembly 21 and one of the plurality of second calibration samples of the second calibration assembly 22 is obtained.
In one embodiment, the ray calibration method further comprises: the first and second calibration assemblies 21, 22 are translated and rotated so as to calibrate radiation in other directions in the radiation beam emitted by the radiation source using a combination of the obtained one of the plurality of first calibration samples of the first calibration assembly 21 and one of the plurality of second calibration samples of the second calibration assembly 22.
In one embodiment, the ray calibration method further comprises: a plurality of radiation sources are placed on one side of the skid base 40 of the radiation calibration device and sub-calibration sample sections corresponding to the first and second calibration assemblies 22, respectively, are arranged in a vertical direction to perform calibration for each radiation source.
Those skilled in the art will appreciate that the embodiments described above are exemplary and that modifications may be made by those skilled in the art, and that the structures described in the various embodiments may be freely combined without conflict in terms of structure or principle.
Although the present invention has been described with reference to the accompanying drawings, the examples disclosed in the drawings are intended to illustrate embodiments of the invention and are not to be construed as limiting the invention.
Although a few embodiments of the present general inventive concept have been shown and described, it would be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the general inventive concept, the scope of which is defined in the claims and their equivalents.
It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality; "upper" and "lower" are used merely to indicate the orientation of the components in the illustrated structure and are not intended to limit the absolute orientation thereof; "first" and "second" are used to distinguish between different components and do not necessarily require a ordering or representation of importance or primary or secondary respectively. In addition, any element numbers of the claims should not be construed as limiting the scope of the disclosure.
Claims (13)
1. A radiation calibration device, comprising:
a motion platform;
at least one calibration assembly (20) mounted on the motion platform, each calibration assembly having a plurality of calibration samples, the at least one calibration assembly comprising a first calibration assembly and a second calibration assembly;
wherein the motion stage is capable of translating and/or rotating the at least one calibration assembly so as to allow a combination of a plurality of calibration samples to be directed against radiation in each direction while the radiation calibration device is calibrating the radiant energy of the radiation in a plurality of directions of the radiation source;
the motion platform includes: the first translation part and the second translation part can independently translate along a first direction respectively, wherein the first calibration component is arranged on the first translation part, and the second calibration component is arranged on the second translation part; the rotating seat is provided with a first translation part and a second translation part, and the first translation part and the second translation part can rotate; or (b)
The motion platform includes: the rotary seat is configured to rotate the first translation part, the first component is arranged on the first translation part, and the second component is arranged on the rotary seat; or (b)
The motion platform includes: a second translation portion capable of translating alone in a first direction and a swivel mount on which the second translation portion is mounted, the swivel mount being configured to rotate the second translation portion, the first assembly being mounted on the swivel mount;
wherein the ray calibration apparatus further comprises: and the upper ends of the first calibration samples of the first calibration assembly and the second calibration samples of the second calibration assembly are slidably connected to an upper slide rail at the upper part of the calibration frame, and the lower ends of the first calibration samples of the first calibration assembly and the second calibration samples of the second calibration assembly are respectively arranged on the first translation part and the second translation part.
2. The radiation mapping apparatus of claim 1, wherein each of the plurality of mapping samples of each mapping assembly is configured to have a set length and a longitudinal transverse cross-section has a stepped shape such that when the radiation beam traverses different portions of the steps of one or more of the plurality of mapping samples, the thickness of the mapping sample traversed by the radiation beam is different, thereby enabling mapping of different energy rays.
3. A radiation calibration device according to claim 2, wherein each calibration assembly is arranged such that each of the plurality of calibration samples is detachable in length into a plurality of sub-calibration sample sections.
4. A radiation calibration device according to claim 1, wherein at least one of the calibration assemblies comprises a first calibration assembly (21) comprising a plurality of first calibration samples (21-1, 21-2, 21-3) and a second calibration assembly (22) comprising a plurality of second calibration samples (22-1, 22-2, 22-3), one of the plurality of first calibration samples and one of the plurality of second calibration samples being capable of constituting a desired calibration combination by translation and/or rotation of the first calibration assembly and/or the second calibration assembly.
5. The radiation calibration device according to claim 1, wherein the motion platform further comprises a slide base (40), wherein the swivel is reciprocally translatable on the slide base, the slide base being arranged along the first direction.
6. The radiation calibration device according to claim 1, wherein the first translation section comprises a first translation rail (341-1) mounted on the rotation base and extending in a first direction, a first translation stage (343-1) mounted on the first translation rail and translatable along the first translation rail, a first timing belt (342-1) mounted on the rotation base at the first translation stage, and a first timing motor (344-1), wherein the first timing belt (342-1) forms a loop and is driven by the first timing motor (344-1) to reciprocally move the first translation stage in the first direction; and/or
The second translation part comprises a second translation guide rail (341-2) which is arranged on the rotary seat and extends along the first direction, a second translation table (343-2) which is arranged on the second translation guide rail and can translate along the second translation guide rail, a second synchronous belt (342-2) which is arranged on the rotary seat and positioned on the second translation table, and a second synchronous motor (344-2), wherein the second synchronous belt (342-2) forms a loop and is driven by the second synchronous motor (344-2) so as to reciprocally move the second translation table along the first direction.
7. The radiation calibration device according to claim 5, wherein the swivel (30) comprises: a translation base (31) mounted on the slide base for reciprocal sliding on the slide base; a rotary table (32) mounted on the translation base, and a transmission mechanism and a rotary driving motor (332) mounted on the translation base for driving the rotary table to rotate.
8. The radial calibration device according to claim 7, wherein the rotary table comprises an upper carrier plate (322) and a lower transmission seat (321), the transmission mechanism comprises a transmission worm (331) mounted on the translation base and a transmission worm wheel mounted on the lower transmission seat of the rotary table, and the transmission worm (331) is engaged with the corresponding transmission worm wheel so that the transmission worm is rotated by the drive of the rotary drive motor, thereby rotating the rotary table.
9. The radiation calibration device of claim 1, wherein the motion platform further comprises:
a slide rail base (40) on which the first translation portion and the second translation portion are mounted; and
a first rotating part (5-12) mounted on the first translating part, and a second rotating part (5-13) mounted on the second translating part, the first calibrating component being mounted on the first rotating part of the first translating part, the second calibrating component being mounted on the second rotating part of the second translating part.
10. The radiation targeting device of claim 9, further comprising a first sub-targeting frame mounted on the first rotating part and a second sub-targeting frame mounted on the second rotating part,
wherein, the upper ends of a plurality of first calibration samples (21) of the first calibration assembly are slidably connected to the upper slide rail of the first sub-calibration frame at the upper part of the first sub-calibration frame, and the lower ends of a plurality of first calibration samples are mounted on the first rotating part;
the upper ends of a plurality of second calibration samples (22) of the second calibration assembly are slidably connected to the second sub-calibration frame upper slide rail of the upper portion of the second sub-calibration frame, and the lower ends of the plurality of second calibration samples are mounted on the second rotating portion.
11. A radiation calibration method using the radiation calibration device according to any one of claims 4-10, the radiation calibration method comprising:
the radiation source to be calibrated is positioned at one side of the slide rail base of the ray calibration equipment;
moving the first calibration assembly and the second calibration assembly through the motion platform, so that the radiation source emits rays towards the first calibration assembly and the second calibration assembly;
wherein, according to the calibration needs, a combination of one of a plurality of first calibration samples of the first calibration assembly and one of a plurality of second calibration samples of the second calibration assembly is obtained.
12. The radiation calibration method of claim 11, further comprising: translating and/or rotating the first and second calibration assemblies so as to calibrate radiation in other directions in the radiation beam emitted by the radiation source using a combination of the obtained one of the plurality of first calibration samples of the first calibration assembly and one of the plurality of second calibration samples of the second calibration assembly.
13. The radiation calibration method of claim 11, further comprising: and placing a plurality of radiation sources on one side of a slide rail base of the ray calibration device, and arranging sub calibration sample sections respectively corresponding to the first calibration assembly and the second calibration assembly along the vertical direction so as to calibrate each radiation source.
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| CN201911361554.3A CN113031042B (en) | 2019-12-24 | 2019-12-24 | Ray calibration device and method |
| PCT/CN2020/116867 WO2021128999A1 (en) | 2019-12-24 | 2020-09-22 | Ray calibration device and method |
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| CN201911361554.3A CN113031042B (en) | 2019-12-24 | 2019-12-24 | Ray calibration device and method |
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| CN113031042A (en) | 2021-06-25 |
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