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WO2021238862A1 - Ct扫描设备 - Google Patents

Ct扫描设备 Download PDF

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Publication number
WO2021238862A1
WO2021238862A1 PCT/CN2021/095517 CN2021095517W WO2021238862A1 WO 2021238862 A1 WO2021238862 A1 WO 2021238862A1 CN 2021095517 W CN2021095517 W CN 2021095517W WO 2021238862 A1 WO2021238862 A1 WO 2021238862A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
slip ring
scanning device
support frame
track
Prior art date
Application number
PCT/CN2021/095517
Other languages
English (en)
French (fr)
Inventor
陈志强
张丽
黄清萍
洪明志
张立国
李桂培
Original Assignee
清华大学
同方威视技术股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 清华大学, 同方威视技术股份有限公司 filed Critical 清华大学
Priority to EP21814516.7A priority Critical patent/EP4160277A4/en
Publication of WO2021238862A1 publication Critical patent/WO2021238862A1/zh

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
    • G01V5/20—Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects
    • G01V5/22—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays
    • G01V5/226—Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays using tomography
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
    • A61B6/03—Computed tomography [CT]
    • A61B6/032—Transmission computed tomography [CT]
    • A61B6/035—Mechanical aspects of CT
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
    • A61B6/56—Details of data transmission or power supply, e.g. use of slip rings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G01N23/046—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material using tomography, e.g. computed tomography [CT]
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/03—Investigating materials by wave or particle radiation by transmission
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/10—Different kinds of radiation or particles
    • G01N2223/101—Different kinds of radiation or particles electromagnetic radiation
    • G01N2223/1016—X-ray
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/30—Accessories, mechanical or electrical features
    • G01N2223/308—Accessories, mechanical or electrical features support of radiation source

Definitions

  • the embodiments of the present disclosure relate to a CT scanning device, and more particularly to a CT scanning device with a slip ring.
  • the scanning device includes a slip ring (rotating gantry), an X-ray tube and a detector mounted on the slip ring.
  • the X-ray beam generated by the X-ray tube passes through the collimator to cross-scan the inspected target such as the human body or cargo.
  • Each detector receives the attenuated signal of the X-ray penetrating human tissue or cargo and converts it into an electrical signal. It is converted into digital signal (original data) through analog-to-digital conversion and stored in the memory.
  • the attenuation of X-rays passing through the object to be inspected is a function of the density of the material through which the radiation beam passes.
  • the attenuated X-rays are detected, and an X-ray photograph image of the inspected target is generated to show the inspection result.
  • the slip ring adopts a single large bearing as a rotating support
  • the slip ring, the X-ray tube and the detector are rotatably mounted on the large bearing
  • the driving mechanism drives the slip ring to rotate through a multi-ribbed belt.
  • the conveying channel used to transport the inspected target passes through the large bearing and the slip ring, and the inspected target is detected while moving in the conveying channel.
  • the slip ring is rotatably supported by a number of small bearing wheels, and a motor is used to directly drive one of the small bearing wheels.
  • the friction wheel transmission principle drives the slip ring to rotate.
  • the two end faces of the slip ring are provided with small bearing stop wheels for limiting the axial displacement of the slip ring.
  • the conveying channel used to transport the inspected target passes through the large bearing and the slip ring, and the inspected target is detected while moving in the conveying channel.
  • the purpose of the present disclosure is to solve at least one aspect of the above-mentioned problems and defects in the prior art.
  • a CT scanning device including: a support frame; a slip ring; a driving mechanism configured to drive the slip ring to rotate relative to the support frame; at least two rings
  • the track is installed on the outer periphery of the slip ring; at least two sets of support devices, each of which includes at least two roller assemblies arranged around the annular track and suitable for supporting the slip ring.
  • Each roller assembly includes a roller installed on the support frame and combined with the annular track to support the slip ring. The roller of at least one of the at least two roller assemblies is combined with the annular track to prevent the slip ring from moving in the axial direction.
  • the roller of the at least one roller assembly has an annular recess surrounding the outer periphery of the roller, and the annular track is at least partially integrated into the recess.
  • the annular track has a track depression arranged in a circumferential direction, and the roller of the at least one roller assembly is at least partially integrated into the track depression.
  • the recess of each of the rollers has a substantially V-shaped cross section, and the cross section of the annular track has a shape matching the recess.
  • the angle between the two sides of the substantially V-shaped recess is 85 to 95 degrees, preferably 90 degrees.
  • each of the roller assemblies further includes: a base mounted on the support frame; and a support shaft fixedly mounted on the base, and the roller is rotatably mounted On the support shaft.
  • each group of the supporting device includes four roller assemblies arranged at equal intervals on the outer periphery of the slip ring.
  • a roller is installed on the base of each roller assembly.
  • two bases located on the upper part of the axis of the slip ring are respectively equipped with a roller, located at the two lower parts of the axis of the slip ring.
  • Two rollers are respectively installed on each base.
  • two bases located on the upper part of the axis of the slip ring are respectively equipped with elastic mechanisms, and the elastic mechanisms are configured to be installed in The rollers on the two bases elastically abut on the circular track.
  • an annular mounting seat is provided at one end of the slip ring, and the driving mechanism is configured to drive the mounting seat to rotate.
  • the driving mechanism includes: a stator assembly mounted on the support frame; and a rotor assembly mounted on the mounting seat, the stator assembly and the rotor assembly are electromagnetically coupled, To drive the rotor assembly to rotate relative to the stator assembly.
  • the stator assembly includes: a cylindrical stator mounted on the support frame; and an induction coil wound on the stator.
  • the rotor assembly includes: a cylindrical rotor, one end of the rotor is mounted on the mounting seat and located on the inner side of the stator; and a permanent magnet is mounted on the outer side of the rotor and is connected to the induction coil Electromagnetic coupling.
  • one of the two circular rails is installed on the mounting seat.
  • At least two lubrication mechanisms are provided on the support frame, and the lubrication mechanisms are configured to apply lubricant to the annular track.
  • each of the lubrication mechanisms includes: a container, a mounting seat on the support frame, and suitable for accommodating lubricant; an applicator, suitable for coating lubricant on the annular track
  • a delivery pipe is connected between the container and the applicator to deliver the lubricant in the container to the applicator.
  • the lubrication mechanism further includes a regulator suitable for adjusting the flow rate of the lubricant.
  • the lubrication mechanism further includes a support frame, the support frame is mounted on the support frame, and the applicator is mounted on the support frame.
  • a buffer layer is provided on the surface of at least one of the annular track and the roller.
  • Fig. 1 shows a simplified schematic diagram of a CT scanning device according to an exemplary embodiment of the present disclosure
  • Fig. 2 shows a schematic diagram of a CT scanning device according to an exemplary embodiment of the present disclosure
  • Fig. 3 shows a side view of a partial cross-section of a CT scanning device of an exemplary embodiment of the present disclosure
  • Fig. 4 shows an enlarged schematic diagram of part A shown in Fig. 3;
  • Fig. 5 shows an enlarged schematic diagram of part B shown in Fig. 3;
  • Fig. 6 shows a simplified schematic diagram of the rollers and the circular track of an exemplary embodiment of the present disclosure
  • Fig. 7 shows a front view of the CT scanning device shown in Fig. 3.
  • FIG. 8 shows an enlarged schematic diagram of part C shown in FIG. 7.
  • orientation words such as “front, back, up, down, left, right”, “horizontal, vertical, vertical, horizontal” and “top, bottom”, etc. indicate the orientation Or positional relationship is usually based on the orientation or positional relationship shown in the drawings, and is based on the traveling direction of the vehicle, only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise stated, these positional words are not Indications and hints indicate that the device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the scope of protection of the present disclosure; the orientation word “inside and outside” refers to the outline of each component itself Inside and outside.
  • a CT scanning device including: a support frame; a slip ring; a driving mechanism configured to drive the slip ring to rotate relative to the support frame; at least two rings
  • a track is installed on the outer periphery of the slip ring; at least two sets of support devices, each of which includes at least two roller assemblies arranged around the annular track and suitable for supporting the slip ring.
  • Each roller assembly includes a roller installed on the support frame and combined with the annular track to support the slip ring. The roller of at least one of the at least two roller assemblies is combined with the annular track to prevent the slip ring from moving in the axial direction.
  • Fig. 1 shows a simplified schematic diagram of a CT scanning device according to an exemplary embodiment of the present disclosure
  • Fig. 2 shows the principle of a CT (computed tomography) scanning device according to an exemplary embodiment of the present disclosure ⁇ Schematic.
  • the CT scanning device 100 is suitable for checking whether there are drugs, explosives, Prohibited items such as combustibles.
  • the CT scanning apparatus 100 includes: an inspection passage 400; a conveying device 200 that conveys an inspected target 300 in the inspection passage 400; and a scanning device configured to inspect the target 200 conveyed by the conveying device 200.
  • the conveying device 200 includes a conveyor belt 201 suitable for carrying the object to be inspected and a driving roller 202 for driving the conveyor belt to move.
  • FIG. 3 shows a partial cross-sectional side view of a CT scanning device according to an exemplary embodiment of the present disclosure
  • Fig. 4 shows an enlarged schematic diagram of part A shown in Fig. 3
  • Fig. 5 shows An enlarged schematic diagram of part B shown
  • FIG. 6 shows a simplified schematic diagram of the rollers and the circular track of an exemplary embodiment of the present disclosure
  • FIG. 7 shows a front view of the CT scanning device shown in FIG. 3
  • FIG. 8 shows an enlarged schematic diagram of part C shown in FIG. 7.
  • the CT scanning device 100 further includes: a support frame 1 with an outer contour roughly in the shape of a cube.
  • the support frame 1 is supported on a base 11;
  • the inspection channel 400 passes through the slip ring 2;
  • the drive mechanism 3 configured to drive the slip ring 2 to rotate relative to the support frame 2;
  • Each roller assembly 51 includes at least one roller 511 installed on the support frame 1 and combined with the annular track 4 to support the slip ring 2.
  • the roller 511 of at least one of the at least two roller assemblies 51 is combined with the annular track 4 to prevent the slip ring 2 from moving in the axial direction.
  • the scanning device includes a slip ring (rotating gantry) 2, an X-ray tube 101 mounted on the slip ring 2, and a detector array 102.
  • the supporting device 5 is suitable for supporting the slip ring 2, and at the same time, at least one roller assembly in the supporting device 5 also has the function of preventing the slip ring 2 from moving in the axial direction.
  • the controller receives the operating instructions input by the user through the computer at the workstation, and controls the action of the drive mechanism 3 according to the operating instructions; the slip ring drives the X-ray tube and the detector 102 to rotate under the drive of the drive mechanism 3 At the same time, the X-ray tube 101 can generate an X-ray beam under the control of the controller.
  • the X-ray beam passes through the inspected target 300 moving on the conveying device 200 and irradiates the detector array 102; the detector array 102
  • the received X-ray beam is converted into electrical signals and transmitted to the data acquisition module; the image recognition module receives the data of the data acquisition module, and reconstructs the received data to generate image data; the generated image data Transfer to the computer to identify and inspect the inspected target.
  • the roller 511 of the at least one roller assembly 51 has an annular recess 515 surrounding the outer periphery of the roller, and the annular track 4 is at least partially coupled to the In the recess 515, the slip ring is prevented from moving in the axial direction.
  • the annular track has a track depression arranged in a circumferential direction, and the roller of the at least one roller assembly is at least partially integrated into the track depression.
  • the drive mechanism 3 is used to drive the slip ring to rotate relative to the support frame 1.
  • two circular rails 4 are arranged on the slip ring, and the rollers 511 of each group of supporting devices 5 are combined with the circular rail 4
  • the slip ring is rotatably supported, and the annular track 4 is at least partially integrated into the recess 515 of the roller 511, so that the slip ring can be prevented from moving in the axial direction.
  • the outer diameter of the ring roller 511 is significantly smaller than the outer diameter of the slip ring 2, for example, the outer diameter of the ring roller 511 is one-fifteenth to one-eighth of the outer diameter of the slip ring 2, and a plurality of ring rollers 511 are paired While supporting the slip ring, it can prevent the slip ring from moving in the axial direction.
  • a buffer layer 41 is provided on the surface of the annular track 4 that is in contact with the roller 511.
  • a buffer layer is provided on the surface of the roller 511 that is in contact with the annular track 4, or a buffer layer is provided on the surfaces of the annular track 4 and the roller 511.
  • the recess 515 of each roller 511 has a substantially V-shaped cross section, and the cross section of the annular track 4 has a shape that matches the recess 515.
  • the angle between the two sides of the substantially V-shaped recess 515 is 85 to 95 degrees, preferably 90 degrees.
  • the cross section of the recess 515 and the circular track is set to be roughly V-shaped, so that the roller 511 can axially position the circular track. When the two are worn out, the beam surface of the X-ray tube emitted by the CT scanning device is different. Axial displacement will occur.
  • each of the roller assemblies 51 further includes: a base 513 installed on the support frame 1 through a bolt assembly 512; and a base 513 fixedly installed on the supporting frame 1
  • the roller 511 is rotatably mounted on the supporting shaft 514.
  • the support frame 1 supports the slip ring through the base 513 and the roller 511.
  • the roller of the supporting device on the left side in FIG. 3 is provided with a recess, and the recess 515 of the roller 511 is matched with the circular track 4.
  • the roller includes at least one of a V-shaped bearing wheel, an elastic V-shaped bearing wheel, a cylindrical bearing wheel, and an elastic cylindrical bearing wheel.
  • the supporting frame 1 includes at least two upright frames and at least two horizontal frames, and the upright frames and the horizontal frames are combined by welding.
  • the outer circumferential surface of the roller of the supporting device located on the right side in FIG. 3 is set to be substantially flat. That is, the roller 511 makes smooth contact with the circular track 4.
  • the supporting device on the right side is mainly used to support the slip ring 2.
  • the roller of the supporting device on the right side may be designed to have a recess combined with the circular track.
  • each group of the supporting device 5 includes four roller assemblies 51 arranged at equal intervals on the outer periphery of the slip ring 2.
  • each group of supporting devices may be provided with 3 or 5 roller assemblies arranged in a star shape, and the distance between two adjacent isolation assemblies may not be equal.
  • a roller 511 is installed on the base 513 of each roller assembly 51.
  • two bases located on the upper part of the axis of the slip ring 2 are respectively equipped with a roller, and the Two rollers are respectively installed on the two bases at the lower part of the axis. In this way, two rollers are installed on the base at the lower part of the axis of the slip ring, which can support the weight of the slip ring and prevent the slip ring from moving in the axial direction.
  • two bases 513 located on the upper part of the axis of the slip ring 2 are respectively equipped with elastic mechanisms,
  • the elastic mechanism 516 is configured to make the rollers installed on the two bases 513 elastically abut against the annular track 4.
  • an annular mounting seat 6 is respectively provided at both ends of the slip ring 2.
  • the mounting seat 6 has a substantially flange shape and passes through multiple Two bolt parts are installed at the end of the slip ring 2.
  • the driving mechanism 3 is configured to drive one of the mounting bases 6 to rotate, such as the mounting base 6 on the right side in FIG. 3.
  • the driving mechanism 3 includes: a stator assembly mounted on the support frame 1; and a rotor assembly mounted on the mounting seat 6, so The stator assembly and the rotor assembly are electromagnetically coupled to drive the rotor assembly to rotate relative to the stator assembly.
  • the stator assembly includes a cylindrical stator 31 installed on the support frame 1; and an induction coil 32 wound on the stator 31.
  • the rotor assembly includes a cylindrical rotor 33 and a permanent magnet 34. One end of the rotor 33 is mounted on the mounting seat 6 and located inside the stator 31. The permanent magnet 34 is mounted on the The outer side of the rotor 33 is electromagnetically coupled with the induction coil 32. In this way, the stator assembly and the rotor assembly form a motor, and the stator 31 directly drives the slip ring to rotate, so this driving method of the slip ring is called "self-driving".
  • the driving mechanism may include a motor, and a conveyor belt driven by the motor and surrounding a slip ring, such as a V-ribbed belt.
  • the driving mechanism includes a motor, and a driving wheel driven by the motor and in contact with the outer periphery of the slip ring.
  • one of the two annular rails 4 is mounted on the mounting seat 6 through a plurality of bolt parts.
  • each of the lubricating mechanisms 7 includes a container 71 on the support frame 1 that is mounted on the support frame 1 and is suitable for accommodating lubricant; And a delivery pipe 72 connected between the container 71 and the applicator 72 to deliver the lubricant in the container 71 to the applicator 72.
  • the lubricating mechanism 7 further includes a regulator 74 suitable for adjusting the flow rate of the lubricant. In this way, the adjuster 74 can be operated according to actual needs to adjust the amount of lubricant. With a small amount of lubricant, it can take away the heat of the circular track and help reduce friction and noise.
  • the lubricating mechanism 7 further includes a support frame 75, the support frame 75 is installed on the support frame 1, and the applicator 72 is installed on the support frame 75 to The coater 72 is stably supported.
  • a plurality of rollers with smaller outer diameters are used to support the slip ring, and the cantilever structure for supporting the slip ring can be omitted; the rollers are easy to replace when damaged, and the cost is low. Since there is no requirement for pressing force between the friction pair formed by the roller and the circular track, the weight of the CT scanning device is reduced, and the overall structure is more compact.
  • the slip ring is axially positioned by the cooperation of the roller with a generally V-shaped recess and the annular track with a generally V-shaped protrusion. When the roller and the annular track are worn, the beam surface of the radiation beam will not be axially displaced.
  • the slip ring adopts a self-driving mode, which can simplify the transmission system, improve transmission efficiency, reduce the startup time of slip ring rotation, reduce the incidence of transmission failure, and improve the convenience of equipment maintenance.

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Abstract

一种CT扫描设备（100），包括：支撑框架（）；滑环（2）；驱动机构（3），被构造成驱动滑环（2）相对于支撑框架（1）转动；至少两个环形轨道（4），安装在滑环（2）的外周边；至少两组支撑装置（5），每组支撑装置（5）包括环绕环形轨道（4）布置、并适用于支撑滑环（2）的至少两个滚轮组件（51），每个滚轮组件（51）包括滚轮（511），滚轮（511）安装在支撑框架（1）上并与环形轨道（4）结合，以支撑滑环（2），至少两个滚轮组件（51）中的至少一个滚轮组件（51）的滚轮（511）与环形轨道（4）结合成阻止滑环（2）在轴向方向上的移动。利用多个外径尺寸较小的滚轮（511）支撑滑环（2），可以省略用于支撑滑环（2）的悬臂结构，而且滚轮（511）损坏后易于更换。

Description

CT扫描设备
交叉引用
本公开要求于2020年5月29日提交的、申请号为202010482062.6的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开的实施例涉及一种CT扫描设备，特别是涉及一种具有滑环的CT扫描设备。
背景技术
传统的CT扫描设备主要包括：扫描装置、计算机系统、电源和附属设备。扫描装置包括滑环(转动架，rotating gantry)、安装在滑环上的X线管和探测器。X射线管产生的X射线束通过准直器对人体或货物之类的被检查目标进行横断扫描，每个探测器接收X射线透过人体组织或货物的衰减信号，并转换为电信号，再经模数转换为数字信号(即原始数据)，并存入存储器。X射线穿过被检查目标的衰减量是放射线束所经过的物质的密度的函数。衰减后的X射线被检测，产生被检查目标的X射线照片图像以用于示出检查结果。
在一种现有CT扫描设备中，滑环采用单个大轴承作为旋转支撑，滑环、X射线管和探测器可转动地安装在大轴承上，驱动机构通过多楔带驱动滑环转动。用于传输被检查目标的输送通道穿过大轴承和滑环，被检查的目标在输送通道中移动的同时被检测。
在另一种现有CT扫描设备中，滑环有若干个小轴承轮可转动地支撑，使用电机直接驱动其中某一个小轴承轮，通过摩擦轮传动原理，驱动滑环回转运动。滑环的两个端面，设置有小轴承挡轮，用于限制滑环的轴向位移。用于传输被检查目标的输送通道穿过大轴承和滑环，被检查的目标在输送通道中移动的同时被检测。
发明内容
本公开的目的旨在解决现有技术中存在的上述问题和缺陷的至少一个方面。
根据本公开的一个方面的实施例，提供一种CT扫描设备，包括：包括：支撑框架；滑环；驱动机构，被构造成驱动所述滑环相对于所述支撑框架转动；至少两个环形轨道， 安装在所述滑环的外周边；至少两组支撑装置，每组支撑装置包括环绕所述环形轨道布置、并适用于支撑所述滑环的至少两个滚轮组件。每个滚轮组件包括滚轮，所述滚轮安装在所述支撑框架上并与所述环形轨道结合，以支撑所述滑环。所述至少两个滚轮组件中的至少一个滚轮组件的滚轮与所述环形轨道结合成阻止所述滑环在轴向方向上的移动。
根据本公开的一种实施例，所述至少一个滚轮组件的滚轮具有环绕所述滚轮的外周边的环形的凹陷，所述环形轨道至少部分地结合到所述凹陷中。
根据本公开的一种实施例，所述环形轨道具有沿周向方向设置的轨道凹陷，所述至少一个滚轮组件的滚轮至少部分地结合到所述轨道凹陷中。
根据本公开的一种实施例，每个所述滚轮的凹陷具有大致V形的横截面，并且所述环形轨道的横截面具有与所述凹陷配合的形状。
根据本公开的一种实施例，大致V形的所述凹陷的两个侧边的夹角为85至95度，优选为90度。
根据本公开的一种实施例，每个所述滚轮组件还包括：安装在所述支撑框架上的基座；以及固定地安装在所述基座上的支撑轴，所述滚轮可转动地安装在所述支撑轴上。
根据本公开的一种实施例，每组所述支撑装置包括在所述滑环的外周边以等间隔布置的四个滚轮组件。
根据本公开的一种实施例，每个滚轮组件的基座上安装有一个滚轮。
根据本公开的一种实施例，所述4个滚轮组件的基座中，位于所述滑环的轴线上部的两个基座上分别安装有一个滚轮，位于所述滑环的轴线下部的两个基座上分别安装有两个滚轮。
根据本公开的一种实施例，所述4个滚轮组件的基座中，位于所述滑环的轴线上部的两个基座上分别安装有弹性机构，所述弹性机构被构造成使得安装在所述两个基座上的滚轮弹性地抵靠在所述环形轨道上。
根据本公开的一种实施例，在所述滑环的一端设有环形的安装座，所述驱动机构被构造成驱动所述安装座转动。
根据本公开的一种实施例，所述驱动机构包括：安装在所述支撑框架上的定子组件；以及安装在所述安装座上的转子组件，所述定子组件与所述转子组件电磁耦合，以驱动所述转子组件相对于所述定子组件转动。
根据本公开的一种实施例，所述定子组件包括：安装在所述支撑框架上的筒形的定子；以及缠绕在所述定子上的感应线圈。所述转子组件包括：筒形的转子，所述转子的一端安装在所述安装座上，并位于所述定子的内侧；以及永磁体，安装在所述转子的外侧，并与所述感应线圈电磁耦合。
根据本公开的一种实施例，两个所述环形轨道中的一个安装在所述安装座上。
根据本公开的一种实施例，在所述支撑框架上设有至少两个润滑机构，所述润滑机构被构造成向所述环形轨道上施加润滑剂。
根据本公开的一种实施例，每个所述润滑机构包括：容器，安装座所述支撑框架上，并适用于容纳润滑剂；涂覆器，适用于向所述环形轨道上涂覆润滑剂；输送管，连接在所述容器和涂覆器之间，以将所述容器中的润滑剂输送到所述涂覆器。
根据本公开的一种实施例，所述润滑机构还包括适用于调节所述润滑剂的流量的调节器。
根据本公开的一种实施例，所述润滑机构还包括支撑架，所述支撑架安装在所述支撑框架上，所述涂覆器安装在所述支撑架上。
根据本公开的一种实施例，在所述环形轨道和滚轮中的至少一个的表面上设有缓冲层。
附图说明
图1示出了本公开的一种示例性实施例的CT扫描设备的简易示意图；
图2示出了本公开的一种示例性实施例的CT扫描设备的原理性示意图；
图3示出了本公开的一种示例性实施例的CT扫描设备的局部剖视的侧视图；
图4示出了图3所示的A部分的放大示意图；
图5示出了图3所示的B部分的放大示意图；
图6示出了本公开的一种示例性实施例的滚轮与环形轨道配合的简易示意图；
图7示出了图3所示的CT扫描设备的正视图；以及
图8示出了图7所示的C部分的放大示意图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完 整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本公开及其应用或使用的任何限制。基于本公开中的实施例，本领域普通技术人员在没有开展创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
在下面的详细描述中，为便于解释，阐述了许多具体的细节以提供对本披露实施例的全面理解。然而明显地，一个或多个实施例在没有这些具体细节的情况下也可以被实施。在其他情况下，公知的结构和装置以图示的方式体现以简化附图。对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为授权说明书的一部分。
在本公开的描述中，需要理解的是，方位词如“前、后、上、下、左、右”、“横向、竖向、垂直、水平”和“顶、底”等所指示的方位或位置关系通常是基于附图所示的方位或位置关系，并且以车辆的行进方向为基础，仅是为了便于描述本公开和简化描述，在未作相反说明的情况下，这些方位词并不指示和暗示所指的装置或元件必须具有特定的方位或者以特定的方位构造和操作，因此不能理解为对本公开保护范围的限制；方位词“内、外”是指相对于各部件本身的轮廓的内外。
在本公开的描述中，需要理解的是，使用“第一”、“第二”等词语来限定零部件，仅仅是为了便于对相应零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本公开保护范围的限制。
根据本公开的一种总体上的发明构思，提供一种CT扫描设备，包括：支撑框架；滑环；驱动机构，被构造成驱动所述滑环相对于所述支撑框架转动；至少两个环形轨道，安装在所述滑环的外周边；至少两组支撑装置，每组支撑装置包括环绕所述环形轨道布置、并适用于支撑所述滑环的至少两个滚轮组件。每个滚轮组件包括滚轮，所述滚轮安装在所述支撑框架上并与所述环形轨道结合，以支撑所述滑环。所述至少两个滚轮组件中的至少一个滚轮组件的滚轮与所述环形轨道结合成阻止所述滑环在轴向方向上的移动。
图1示出了本公开的一种示例性实施例的CT扫描设备的简易示意图；图2示出了本公开的一种示例性实施例的CT(计算机断层扫描-computed tomography)扫描设备的 原理性示意图。
在一种示例性实施例中，参见图1和2，CT扫描设备100适用于在车站、机场、码头等场所检查包裹、行李箱、手提包之类的目标300中是否存在毒品、爆炸物、易燃物之类的违禁物品。CT扫描设备100包括：检查通道400；在所述检查通道400内输送被检查目标300的输送装置200；以及被构造成对所述输送装置200输送的目标200进行检查的扫描装置。输送装置200包括适用于承载被检查目标的传送带201和驱动传送带移动的驱动滚筒202。
图3示出了本公开的一种示例性实施例的CT扫描设备的局部剖视的侧视图；图4示出了图3所示的A部分的放大示意图；图5示出了图3所示的B部分的放大示意图；图6示出了本公开的一种示例性实施例的滚轮与环形轨道配合的简易示意图；图7示出了图3所示的CT扫描设备的正视图；以及图8示出了图7所示的C部分的放大示意图。
在一种示例性实施例中，参见图1-8，CT扫描设备100还包括：外部轮廓大致为正方体形状的支撑框架1，支撑框架1被支撑在底座11上；可转动地被支撑在支撑框架1中的滑环2，检查通道400穿过滑环2；被构造成驱动所述滑环2相对于所述支撑框架2转动的驱动机构3；安装在所述滑环2的外周边的至少两个环形轨道4；以及至少两组支撑装置5，每组支撑装置5包括环绕所述环形轨道4布置、并适用于支撑所述滑环2的至少两个滚轮组件51。每个滚轮组件51包括至少一个滚轮511，所述滚轮511安装在所述支撑框架1上并与所述环形轨道4结合，以支撑所述滑环2。所述至少两个滚轮组件51中的至少一个滚轮组件的滚轮511与所述环形轨道4结合成阻止所述滑环2在轴向方向上的移动。扫描装置包括滑环(转动架，rotating gantry)2、安装在滑环2上的X线管101和探测器阵列102。这样，支撑装置5适用于支撑滑环2，同时，支撑装置5中的至少一个滚轮组件还具有阻止滑环2在轴向方向上移动作用。
在对目标300进行检查期间，控制器接收用户通过工作站处的计算机输入的操作指令，并根据操作指令控制驱动机构3动作；滑环在驱动机构3的驱动下带动X射线管和探测器102转动，同时X射线管101在控制器的控制下可产生X射线束，所述X射线束穿过在输送装置200上移动的被检查目标300，并照射到探测器阵列102上；探测器阵列102将接收的X射线束转换成电信号并传输到数据获取模块(data acquisition  module)；图像识别模块接收数据获取模块的数据，并将所接收数据进行重构并产生图像数据；所产生的图像数据传输到计算机，从而对被检查的目标进行识别和检查。
在一种示例性实施例中，参见图1-8，所述至少一个滚轮组件51的滚轮511具有环绕所述滚轮的外周边的环形的凹陷515，所述环形轨道4至少部分地结合到所述凹陷515中，以阻止所述滑环在轴向方向上的移动。在一种可替换的示例性实施例中，所述环形轨道具有沿周向方向设置的轨道凹陷，所述至少一个滚轮组件的滚轮至少部分地结合到所述轨道凹陷中。
根据本公开实施例的CT扫描设备，利用驱动机构3驱动滑环相对于支撑框架1转动，在滑环上设置例如两个环形轨道4，每组支撑装置5的滚轮511通过与环形轨道4结合对滑环进行可转动地支撑，所述环形轨道4至少部分地结合到滚轮511的凹陷515中，这样可以阻止所述滑环在轴向方向上的移动。由于环形滚轮511的外径显著地小于滑环2的外径，例如环形滚轮511的外径为滑环2的外径的十五分之一至八分之一，并且多个环形滚轮511对滑环进行支撑的同时，可以防止述滑环在轴向方向上的移动。
在一种示例性实施例中，如图6所示，在所述环形轨道4的与滚轮511接触的表面上设有缓冲层41。在另一种实施例中，在滚轮511的与环形轨道4接触的表面上设有缓冲层、或者在所述环形轨道4和滚轮511的表面上都设有缓冲层。通过设置缓冲层可以吸收环形轨道4的热膨胀量，防止滚轮511与环形轨道之间的接触而导致的损坏。
在一种示例性实施例中，如图6所示，每个所述滚轮511的凹陷515具有大致V形的横截面，并且所述环形轨道4的横截面具有与所述凹陷515配合的形状。例如，大致V形的所述凹陷515的两个侧边的夹角为85至95度，优选为90度。通过凹陷515和环形轨道的横截面设置成大致的V形，使得滚轮511可以对环形轨道进行轴向定位，当两者发生磨损时，CT扫描设备的X射线管的发射的光束的束面不会发生轴向位移。
在一种示例性实施例中，如图3-5所示，每个所述滚轮组件51还包括：通过螺栓组件512安装在所述支撑框架1上的基座513；以及固定地安装在所述基座513上的支撑轴514，所述滚轮511可转动地安装在所述支撑轴514上。这样，支撑框架1通过基座513和滚轮511实现对滑环的支撑。在一种示例性实施例中，如图3和4所示，位于图3中左侧的支撑装置的滚轮的设有凹陷，并且滚轮511的凹陷515与环形轨道4配合。 滚轮包括V型轴承轮、弹性V型轴承轮、圆柱型轴承轮、及弹性圆柱型轴承轮中的至少一种。支撑框架1包括至少两个直立框架和至少两个水平框架，所述直立框架与所述水平框架通过焊接的方式结合。
在一种示例性实施例中，如图3和5所示，位于图3中右侧的支撑装置的滚轮的外圆周表面设置成大致平坦的。也就是说，滚轮511与环形轨道4平滑地接触。可以理解，在此情况下，该右侧的支撑装置主要用于支撑滑环2。在一种可替换的实施例中，可以将右侧的支撑装置的滚轮设计成具有与环形轨道结合的凹陷。
在一种示例性实施例中，如图3-7所示，每组所述支撑装置5包括在所述滑环2的外周边以等间隔布置的四个滚轮组件51。但本公开的实施例并不局限于此，根据实际需要，每组支撑装置可以设置星形布置的3个或者5个滚轮组件，而且相邻两个隔离组件之间的距离可以不相等。
在一种示例性实施例中，每个滚轮组件51的基座513上安装有一个滚轮511。在一种可替换的实施例中，所述4个滚轮组件51的基座中，位于所述滑环2的轴线上部的两个基座上分别安装有一个滚轮，而位于所述滑环的轴线下部的两个基座上分别安装有两个滚轮。这样，所述滑环的轴线下部的基座上都安装有两个滚轮，可以支持滑环的重量，并阻止滑环在轴向方向上移动。
在一种示例性实施例中，如图3和5所示，所述4个滚轮组件的基座中，位于所述滑环2的轴线上部的两个基座513上分别安装有弹性机构，所述弹性机构516被构造成使得安装在所述两个基座513上的滚轮弹性地抵靠在所述环形轨道4上。通过设置弹性机构516可以吸收环形轨道4的热膨胀量，减小加工和安装误差对整个CT扫描设备造成的不利影响。
在一种示例性实施例中，如图3-7所示，在所述滑环2的两端分别设有环形的安装座6，例如，安装座6具有大致的法兰形状，并通过多个螺栓部件安装在滑环2的端部。所述驱动机构3被构造成驱动所述安装座6中的一个转动，例如图3中位于右侧的安装座6。
在一种示例性实施例中，如图3-7所示，所述驱动机构3包括：安装在所述支撑框架1上的定子组件；以及安装在所述安装座6上的转子组件，所述定子组件与所述转子 组件电磁耦合，以驱动所述转子组件相对于所述定子组件转动。进一步地，所述定子组件包括安装在所述支撑框架1上的筒形的定子31；以及缠绕在所述定子31上的感应线圈32。另一方面，所述转子组件包括筒形的转子33和永磁体34，所述转子33的一端安装在所述安装座6上，并位于所述定子31的内侧，永磁体34安装在所述转子33的外侧并与所述感应线圈32电磁耦合。这样，定子组件和转子组件形成电动机，并且定子31直接驱动滑环转动，因此滑环的这种驱动方式称为“自驱动”。
在一种可替换的实施例中，驱动机构可以包括电机、和受电机驱动并环绕滑环的传送带，例如多楔带。在另一种实施例中，驱动机构包括电机、和受电机驱动并与滑环的外周边接触的驱动轮。
在一种示例性实施例中，如图3和4所示，两个所述环形轨道4中的一个通过多个螺栓部件安装在所述安装座6上。
在一种示例性实施例中，如图6和7所示，在所述支撑框架1上设有至少两个润滑机构7，所述润滑机构7被构造成向所述环形轨道4上施加润滑剂。进一步地，每个所述润滑机构7包括安装座所述支撑框架1上并适用于容纳润滑剂的容器71；适用于向所述环形轨道4上涂覆润滑剂的涂覆器72，例如刷子；以及连接在所述容器71和涂覆器72之间、以将所述容器71中的润滑剂输送到所述涂覆器72的输送管72。所述润滑机构7还包括适用于调节所述润滑剂的流量的调节器74。这样，可根据实际需要操作调节器74，以调整润滑剂的量。通过微量润滑剂，可带走环形轨道的热量，并有助于减小摩擦，降低噪音。
在一种示例性实施例中，所述润滑机构7还包括支撑架75，所述支撑架75安装在所述支撑框架1上，所述涂覆器72安装在所述支撑架75上，以对涂覆器72进行稳定地支撑。
根据本公开实施例的CT扫描设备，利用多个外径尺寸较小的滚轮支撑滑环，可以省略用于支撑滑环的悬臂结构；滚轮损坏后易于更换，成本低。由于滚轮与环形轨道形成的摩擦副之间没有压紧力的要求，降低了CT扫描设备的重量，其整体结构也更紧凑。采用具有大致V形凹陷的滚轮与大致V形凸起的环形轨道的配合对滑环进行轴向定位，当滚轮和环形轨道发生磨损时，辐射束的束面不会发生轴向位移。
进一步地，根据本公开实施例的CT扫描设备，滑环采用自驱动方式，可以简化传动系统，提高传动效能，减小滑环转动的启动时间，降低传动故障发生率，提高设备维护便利性。
本领域的技术人员可以理解，上面所描述的实施例都是示例性的，并且本领域的技术人员可以对其进行改进，各种实施例中所描述的结构在不发生结构或者原理方面的冲突的情况下可以进行自由组合。
虽然结合附图对本公开进行了说明，但是附图中公开的实施例旨在对本公开优选实施方式进行示例性说明，而不能理解为对本公开的一种限制。虽然本公开发明构思的一些实施例已被显示和说明，本领域普通技术人员将理解，在不背离本总体实用新型构思的原则和精神的情况下，可对这些实施例做出改变，本公开的范围以权利要求和它们的等同物限定。

Claims (19)

  1. 一种CT扫描设备(100)，包括：
    支撑框架(1)；
    滑环(2)；
    至少两个环形轨道(4)，安装在所述滑环的外周边；
    驱动机构(3)，被构造成驱动所述滑环相对于所述支撑框架转动；
    至少两组支撑装置(5)，每组支撑装置包括环绕所述环形轨道布置、并适用于支撑所述滑环的至少两个滚轮组件(51)，
    其中，每个滚轮组件包括至少一个滚轮(511)，所述至少一个滚轮安装在所述支撑框架上并与所述环形轨道结合，以支撑所述滑环，
    其中，所述至少两个滚轮组件中的至少一个滚轮组件的滚轮与所述环形轨道结合成阻止所述滑环在轴向方向上的移动。
  2. 根据权利要求1所述的CT扫描设备，其中，所述至少一个滚轮组件的滚轮具有环绕所述滚轮的外周边的环形的凹陷(515)，所述环形轨道至少部分地结合到所述凹陷中。
  3. 根据权利要求1所述的CT扫描设备，其中，所述环形轨道具有沿周向方向设置的轨道凹陷，所述至少一个滚轮组件的滚轮至少部分地结合到所述轨道凹陷中。
  4. 根据权利要求1-3中的任一项所述的CT扫描设备，其中，每个所述滚轮的凹陷具有大致V形的横截面，并且所述环形轨道的横截面具有与所述凹陷配合的形状。
  5. 根据权利要求4所述的CT扫描设备，其中，大致V形的所述凹陷的两个侧边的夹角为85至95度，优选为90度。
  6. 根据权利要求1-5中的任一项所述的CT扫描设备，其中，每个所述滚轮组件还 包括：
    安装在所述支撑框架上的基座(513)；以及
    固定地安装在所述基座上的支撑轴(514)，所述滚轮可转动地安装在所述支撑轴上。
  7. 根据权利要求6所述的CT扫描设备，其中，每组所述支撑装置包括在所述滑环的外周边以等间隔布置的四个滚轮组件。
  8. 根据权利要求7所述的CT扫描设备，其中，每个滚轮组件的基座上安装有一个滚轮。
  9. 根据权利要求7所述的CT扫描设备，其中，所述4个滚轮组件的基座中，位于所述滑环的轴线上部的两个基座上分别安装有一个滚轮，位于所述滑环的轴线下部的两个基座上分别安装有两个滚轮。
  10. 根据权利要求7所述的CT扫描设备，其中，所述4个滚轮组件的基座中，位于所述滑环的轴线上部的两个基座上分别安装有弹性机构，所述弹性机构被构造成使得安装在所述两个基座上的滚轮弹性地抵靠在所述环形轨道上。
  11. 根据权利要求1-10中的任一项所述的CT扫描设备，其中，在所述滑环的一端设有环形的安装座(6)，所述驱动机构被构造成驱动所述安装座转动。
  12. 根据权利要求11所述的CT扫描设备，其中，所述驱动机构包括：
    安装在所述支撑框架上的定子组件；以及
    安装在所述安装座上的转子组件，所述定子组件与所述转子组件电磁耦合，以驱动所述转子组件相对于所述定子组件转动。
  13. 根据权利要求12所述的CT扫描设备，其中，所述定子组件包括：
    安装在所述支撑框架上的筒形的定子(31)；以及
    缠绕在所述定子上的感应线圈(32)，
    所述转子组件包括：
    筒形的转子(33)，所述转子的一端安装在所述安装座上，并位于所述定子的内侧；以及
    永磁体(34)，安装在所述转子的外侧，并与所述感应线圈电磁耦合。
  14. 根据权利要求13所述的CT扫描设备，其中，
    两个所述环形轨道中的一个安装在所述安装座上。
  15. 根据权利要求1-14中的任一项所述的CT扫描设备，其中，在所述支撑框架上设有至少两个润滑机构(7)，所述润滑机构被构造成向所述环形轨道上施加润滑剂。
  16. 根据权利要求15所述的CT扫描设备，其中，每个所述润滑机构包括：
    容器(71)，安装座所述支撑框架上，并适用于容纳润滑剂；
    涂覆器(72)，适用于向所述环形轨道上涂覆润滑剂；
    输送管(72)，连接在所述容器和涂覆器之间，以将所述容器中的润滑剂输送到所述涂覆器。
  17. 根据权利要求16所述的CT扫描设备，其中，所述润滑机构还包括适用于调节所述润滑剂的流量的调节器(74)。
  18. 根据权利要求16或17所述的CT扫描设备，其中，所述润滑机构还包括支撑架(75)，所述支撑架安装在所述支撑框架上，所述涂覆器安装在所述支撑架上。
  19. 根据权利要求1-19中的任一项所述的CT扫描设备，其中，在所述环形轨道和滚轮中的至少一个的表面上设有缓冲层(41)。
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