WO2021238861A1 - Ct扫描设备 - Google Patents

Ct扫描设备 Download PDF

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Publication number
WO2021238861A1
WO2021238861A1 PCT/CN2021/095512 CN2021095512W WO2021238861A1 WO 2021238861 A1 WO2021238861 A1 WO 2021238861A1 CN 2021095512 W CN2021095512 W CN 2021095512W WO 2021238861 A1 WO2021238861 A1 WO 2021238861A1
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WO
WIPO (PCT)
Prior art keywords
endless belt
slip ring
guide wheel
wheel
scanning device
Prior art date
Application number
PCT/CN2021/095512
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 EP21813817.0A priority Critical patent/EP4160276A1/en
Publication of WO2021238861A1 publication Critical patent/WO2021238861A1/zh

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    • 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
    • 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
    • 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
    • G01N2223/30—Accessories, mechanical or electrical features
    • 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
    • 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
    • G01N2223/40—Imaging
    • G01N2223/419—Imaging computed tomograph
    • 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
    • G01N2223/60—Specific applications or type of materials
    • G01N2223/643—Specific applications or type of materials object on conveyor
    • 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
    • G01N2223/60—Specific applications or type of materials
    • G01N2223/645—Specific applications or type of materials quality control
    • 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
    • G01N2223/60—Specific applications or type of materials
    • G01N2223/652—Specific applications or type of materials impurities, foreign matter, trace amounts

Definitions

  • the embodiments of the present disclosure relate to a CT scanning device, and more particularly to a CT scanning device that drives a slip ring through a conveyor belt.
  • 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 located inside a closed endless belt surrounded by a V-ribbed belt. Because the V-ribbed belt is a worn-out part, it needs to be replaced within a certain period of time.
  • the V-ribbed belt needs to be removed from the slip ring or fitted into the slip ring on the side of the conveying channel, which makes the operation of replacing the V-ribbed belt more cumbersome and heavy workload.
  • the work of replacing the V-ribbed belt requires several man-days, resulting in a waste of time and manpower.
  • 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 rotatably mounted on the support frame; a driving mechanism, mounted on the support frame, and including a drive Wheels; a plurality of guide wheels mounted on the support frame; and an endless belt surrounding a closed periphery, the endless belt is in contact with the slip ring, the driving wheel and the guide wheel, so that the driving wheel passes through the The endless belt drives the slip ring and the guide wheel to rotate.
  • the slip ring is in contact with the endless belt on the outside of the periphery.
  • the driving wheel is in contact with the endless belt on the outside of the periphery.
  • the guide wheels include a plurality of guide wheels arranged around the slip ring, and the plurality of guide wheels are in contact with the endless belt on the inner side of the periphery.
  • one of the plurality of guide wheels is used as a tension wheel suitable for tensioning the endless belt.
  • the CT scanning device further includes a tensioning wheel, and the tensioning wheel is suitable for tensioning the endless belt.
  • the support frame includes: an outer frame; and a cylindrical inner frame, the inner frame is fixed in the outer frame by a plurality of connecting members, and the slip ring can be moved through a bearing mechanism. It is rotatably installed in the inner frame and protrudes axially from the inner frame to form a protruding portion, and the protruding portion is combined with the endless belt.
  • the driving mechanism further includes: a support seat installed on the outer frame and facing the inner frame; and a motor installed on the support seat opposite to the inner frame
  • the output shaft of the motor passes through the support base and extends parallel to the axis of the slip ring, and the drive wheel is installed on the output shaft on the inner side of the support base.
  • the plurality of guide wheels include a first guide wheel, a second guide wheel, a third guide wheel, and a fourth guide wheel respectively located at the vertices of a quadrilateral, the first guide wheel
  • the endless belt between the second guide wheel and the second guide wheel is combined with the driving wheel, and the first guide wheel and the second guide wheel are rotatably installed on the inner side of the support seat.
  • the endless belt between the first guide wheel and the second guide wheel is combined with the slip ring, and the first guide wheel is rotatably mounted on one of the connecting members superior.
  • the fourth guide wheel is rotatably mounted on the other one of the connecting members.
  • the endless belt is made of a V-ribbed belt, and the protruding part of the slip ring is provided with a sheave that cooperates with the V-ribbed belt.
  • an X-ray tube suitable for emitting X-rays and a detector array diametrically opposed to the X-ray tube are mounted on the slip ring.
  • the annular belt is in contact with a part of the outer circumference of the slip ring between the X-ray tube and the detector array.
  • 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 simple three-dimensional schematic diagram of a CT scanning device according to an exemplary embodiment of the present disclosure
  • Fig. 4 shows a front view of the CT scanning device shown in Fig. 3, in which the support base and motor of the driving mechanism are not shown;
  • Fig. 5 shows a side view of the CT scanning device shown in Fig. 4, including a cross-sectional view along the line A-A of Fig. 4;
  • Fig. 6 shows an enlarged schematic diagram of part A shown in Fig. 5;
  • Fig. 7 shows an enlarged schematic diagram of part B shown in Fig. 5;
  • FIG. 8 shows a simplified schematic diagram of the driving mode of the slip ring of an exemplary embodiment of the present disclosure
  • FIG. 9 shows a simplified schematic diagram of the driving mode of the slip ring of another exemplary embodiment of the present disclosure.
  • FIG. 10 shows a simplified schematic diagram of a driving manner of a slip ring according to still another exemplary embodiment of the present disclosure.
  • 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 rotatably mounted on the support frame; a driving mechanism mounted on the support frame , And includes a driving wheel; a plurality of guide wheels mounted on the support frame; and an endless belt surrounding a closed periphery, the endless belt is in contact with the slip ring, the driving wheel and the guide wheel, so that the driving A wheel drives the slip ring and the guide wheel to rotate through the endless belt.
  • the slip ring is in contact with the endless belt on the outside of the periphery.
  • 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 simple three-dimensional schematic diagram of a CT scanning device according to an exemplary embodiment of the present disclosure
  • Fig. 4 shows a front view of the CT scanning device shown in Fig. 3, wherein the support base and motor of the driving mechanism are not shown
  • Figure 5 shows a side view of the CT scanning device shown in Figure 4, including a cross-sectional view along the line AA of Figure 4
  • Figure 6 shows an enlarged schematic view of part A shown in Figure 5
  • Figure 7 shows Fig. 5 shows an enlarged schematic diagram of part B
  • Fig. 8 shows a simplified schematic diagram of a driving mode of a slip ring according to an exemplary embodiment of the present disclosure.
  • the CT scanning device 100 further includes: a support frame 1 with an outer contour that is roughly arched.
  • the support frame 1 is supported on a base 13; and is rotatably supported on The slip ring 2 on the support frame 1, the inspection channel 400 passes through the slip ring 2; the drive mechanism 3 mounted on the support frame 1 and including the drive wheels 31; the multiple guide wheels 4 mounted on the support frame 1 And an endless belt 5 enclosing a closed periphery, the endless belt 5 is in contact with the slip ring 2, the driving wheel 31 and the guide wheel 4, so that the driving wheel 31 drives the slip ring through the endless belt 5 2 and the guide wheel 4 rotate.
  • the slip ring 2 is in contact with the endless belt 5 on the outside of the periphery. In other words, the slip ring 2 is located inside the closed annular space enclosed by the annular belt 5.
  • 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 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 driving wheel 31 is in contact with the endless belt 5 on the outside of the periphery.
  • the endless belt is in contact with at least a part of the outer ring of the driving wheel without being sleeved on the driving wheel, which facilitates the operation of coupling the endless belt to the slip ring or removing the endless belt from the slip ring.
  • the guide wheels include a plurality of guide wheels arranged around the slip ring.
  • the plurality of guide wheels are in contact with the endless belt 5 on the inner side of the periphery, and are respectively located at the vertices of the polygon. It can be understood that each guide wheel is rotatably connected with the fixed shaft through a bearing mechanism.
  • one of the plurality of guide wheels is used as a tensioning wheel suitable for tensioning the endless belt 5.
  • the CT scanning device 100 further includes a tensioning wheel 45, and the tensioning wheel 45 is suitable for tensioning the endless belt 5.
  • the endless belt 5 can be kept in close contact with the driving wheel 31 and the slip ring 2, thereby increasing the friction between the endless belt and the driving wheel and the slip ring.
  • the supporting frame 1 includes: an outer frame 11 mounted on a base 13; and a cylindrical inner frame 12 through which a plurality of The connecting member 14 is fixed in the outer frame 12, and the slip ring 2 is rotatably installed in the inner frame 12 through a bearing mechanism 15 and protrudes axially from the inner frame 12 to form a protruding portion 21.
  • the extension 21 is combined with the endless belt 5.
  • the driving mechanism 3 further includes: a support seat 32 installed on the outer frame 11 and facing the inner frame 12;
  • the motor 33 on the outer side of the support seat 32 opposite to the inner frame 12, the output shaft 34 of the motor passes through the support seat 32 and extends parallel to the axis of the slip ring 2, and the drive wheel 31 is located at The inner side of the supporting seat 32 is mounted on the output shaft 34.
  • the plurality of guide wheels include a first guide wheel 41, a second guide wheel 42, and a third guide wheel located at the vertices of a quadrilateral. 43 and the fourth guide wheel 44.
  • the endless belt 5 between the second guide wheel 42 and the third guide wheel 43 is combined with the driving wheel 31, and the second guide wheel 42 and the third guide wheel 43 are rotatably mounted on the support seat 32 Inside. In this way, there is a predetermined space between the inner frame 12 and the support base 32, and the predetermined frame can be used to accommodate the driving wheels 31, the second guide wheels 42, and the third guide wheels 43, so that the thickness of the CT scanning device 100 can be reduced.
  • the endless belt 5 between the first guide wheel 41 and the second guide wheel 42 is combined with the slip ring 2.
  • the second guide wheel 42 is suitable for abutting the endless belt 5 on the driving wheel 31 and the slip ring 2.
  • the first guide wheel 41 is rotatably mounted on one of the connecting members 14.
  • the fourth guide wheel 44 is rotatably mounted on the other of the connecting members. That is to say, the first guide wheel 41 and the fourth guide wheel 44 are respectively rotatably mounted on the two connecting members 14 between the outer frame 11 and the inner frame 12.
  • the rotation axis of the first guide wheel 41 and the fourth guide wheel 44 It is parallel to the axis of the slip ring 2 and does not exceed the extension 21 of the slip ring 2 to reduce the thickness of the CT scanning device 100.
  • the endless belt 5 is made of a poly-ribbed belt. ⁇ 22. ⁇ 22.
  • the multiple protruding toothed portions of the V-ribbed belt cooperate with the multiple annular grooves of the sheave wheel 22, which can increase the friction between the V-ribbed belt and the sheave wheel and prevent the V-ribbed belt from sliding relative to the slip ring.
  • the slip ring 2 is in contact with the side of the V-ribbed belt provided with the toothed portion, and the guide wheel is in contact with the side of the V-ribbed belt opposite to the toothed portion. That is, the side of the V-ribbed belt provided with the toothed portion is arranged toward the outside.
  • similar sheaves are also provided on the guide wheel 4 and the driving wheel 31.
  • the cross section of the endless belt 5 is substantially triangular or trapezoidal.
  • the endless belt 5 is a flat belt.
  • FIG. 9 shows a simplified schematic diagram of a driving mode of a slip ring according to another exemplary embodiment of the present disclosure.
  • the guide wheels include a first guide wheel 41, a second guide wheel 42, a third guide wheel 43, and a fourth guide wheel 44 arranged around the slip ring.
  • the slip ring is in contact with the annular belt outside the closed periphery enclosed by the annular belt 5.
  • the first guide wheel 41, the second guide wheel 42, the third guide wheel 43 and the fourth guide wheel 44 are in contact with the endless belt 5 on the inner side of the periphery, and are respectively located at the vertices of a quadrilateral.
  • the CT scanning apparatus 100 further includes a tensioning wheel 45 which is suitable for tensioning the endless belt 5.
  • the third guide wheel 43 and the fourth guide wheel 44 are rotatably installed on the support frame, and the endless belt 5 between the third guide wheel 43 and the fourth guide wheel 44 is combined with the drive wheel 31.
  • the endless belt 5 between the first guide wheel 41 and the second guide wheel 42 is combined with the slip ring 2.
  • an X-ray tube 101 suitable for emitting X-rays and a detector radially opposite to the X-ray tube 101 are mounted on the slip ring 2.
  • the X-ray tube 101 and the detector array 102 are driven by the driving mechanism 3 to rotate around the conveying channel 100, thereby performing X-ray scanning inspection on the inspected target 300 moving in the conveying channel.
  • the annular belt 5 is in contact with a part of the outer circumference of the slip ring 2 between the X-ray tube 101 and the detector array 102. In other words, the endless belt 5 does not contact the part of the outer circumference of the slip ring 2 where the X-ray tube 101 and the detector array 102 are provided. In this way, the disassembly and installation of the endless belt will not affect the X-ray tube 101.
  • FIG. 10 shows a simplified schematic diagram of a driving manner of a slip ring according to still another exemplary embodiment of the present disclosure.
  • the guide wheel includes a first guide wheel 41 and a second guide wheel 42 arranged around the slip ring, and the slip ring is surrounded by the endless belt 5.
  • the outer side of the closed periphery is in contact with the endless belt.
  • the first guide wheel 41, the second guide wheel 42, and the driving wheel 31 are in contact with the endless belt 5 on the inner side of the periphery, and are respectively located at the vertices of a triangle.
  • the CT scanning apparatus 100 further includes a tensioning wheel 45 which is suitable for tensioning the endless belt 5.
  • a tensioning wheel 45 which is suitable for tensioning the endless belt 5.
  • the slip ring 2 is in contact with the endless belt 5 on the outside of the periphery, and the endless belt 5 is in contact with the slip ring 2, the driving wheel 31 and the guide wheel 4, so that the driving The wheel 31 drives the slip ring 2 and the guide wheel 4 to rotate through the endless belt 5.
  • the outer diameter of the driving wheel 31 as the driving wheel can be made small, while the outer diameter of the slip ring as the driven wheel remains unchanged.
  • the slip ring is in contact with the annular belt on the outer side of the periphery, and the annular belt is in contact with at least a part of the circular ring outside the slip ring without being sleeved on the slip ring.
  • a protective housing which can significantly shorten the operation time of coupling the endless belt to the sliding ring or removing the endless belt from the slip ring.
  • the endless belt becomes longer, which is beneficial to reduce the wear of the endless belt and prolong its life.

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Abstract

提供一种CT扫描设备，包括：支撑框架；可转动地安装在所述支撑框架上的滑环；驱动机构，安装在所述支撑框架上，并包括驱动轮；安装在所述支撑框架上的多个导向轮；以及围成封闭的周边的环形带，所述环形带与所述滑环、驱动轮和导向轮接触，使得所述驱动轮通过所述环形带驱动所述滑环和导向轮转动。所述滑环在所述周边的外侧与所述环形带接触。在安装、维修或者更换环形带时，无需完全拆除滑环外围的其它部件，可以显著缩短将环形带结合到滑环或者从滑环移除环形带的操作时间。

Description

CT扫描设备
交叉引用
本申请要求于2020年5月29日提交的、申请号为202010482145.5的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开的实施例涉及一种CT扫描设备，特别是涉及一种通过传送带驱动滑环的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。一般地，滑环位于由多楔带围成的封闭的环形带(endless belt)的内部。由于多楔带属于损耗件，在一定的时间内需要更换。在拆除或者安装多楔带期间，需要将多楔带在输送通道一侧从滑环移除或者套入滑环，使得更换多楔带的操作较为繁琐，工作量较大。例如，更换多楔带的工作需要几个工日，造成了时间和人力的浪费。
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：支撑框架；可转 动地安装在所述支撑框架上的滑环；驱动机构，安装在所述支撑框架上，并包括驱动轮；安装在所述支撑框架上的多个导向轮；以及围成封闭的周边的环形带，所述环形带与所述滑环、驱动轮和导向轮接触，使得所述驱动轮通过所述环形带驱动所述滑环和导向轮转动。所述滑环在所述周边的外侧与所述环形带接触。
根据本公开的一种实施例，所述驱动轮在所述周边的外侧与所述环形带接触。
根据本公开的一种实施例，所述导向轮包括环绕所述滑环设置的多个导向轮，所述多个导向轮在所述周边的内侧与所述环形带接触。
根据本公开的一种实施例，所述多个导向轮中的一个用做适用于张紧所述环形带的张紧轮。
根据本公开的一种实施例，CT扫描设备还包括张紧轮，所述张紧轮适用于张紧所述环形带。
根据本公开的一种实施例，所述支撑框架包括：外框架；以及筒形的内框架，所述内框架通过多个连接件固定在所述外框架内，所述滑环通过轴承机构可转动地安装在所述内框架内并从所述内框架轴向地伸出，以形成伸出部，所述伸出部与所述环形带结合。
根据本公开的一种实施例，所述驱动机构还包括：支撑座，安装在所述外框架上并面对所述内框架；以及电机，安装在所述支撑座的与所述内框架相反的外侧，所述电机的输出轴穿过所述支撑座平行于所述滑环的轴线延伸，所述驱动轮在所述支撑座的内侧安装在所述输出轴上。
根据本公开的一种实施例，所述多个导向轮包括分别位于一个四边形的顶点处的第一导向轮、第二导向轮、第三导向轮和第四导向轮，所述第一导向轮和第二导向轮之间的环形带与所述驱动轮结合，所述第一导向轮和第二导向轮可转动地安装在所述支撑座的内侧。
根据本公开的一种实施例，所述第一导向轮和第二导向轮之间的环形带与所述滑环结合，所述第一导向轮可转动地安装在所述连接件中的一个上。
根据本公开的一种实施例，所述第四导向轮可转动地安装在所述连接件中的另一个上。
根据本公开的一种实施例，所述环形带由多楔带制成，所述滑环的伸出部上设有与所述多楔带配合的槽轮。
根据本公开的一种实施例，所述滑环上安装有适用于发射X射线的X射线管、以 及与所述X射线管径向相对的探测器阵列。
根据本公开的一种实施例，所述环形带与所述滑环的位于X射线管和探测器阵列之间的部分外圆周接触。
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扫描设备的简易立体示意图；
图4示出了图3所示的CT扫描设备的正视图，其中驱动机构的支撑座和电机未示出；
图5示出了图4所示的CT扫描设备的侧视图，包括沿图4的A-A线的剖视图；
图6示出了图5所示的A部分的放大示意图；
图7示出了图5所示的B部分的放大示意图；
图8示出了本公开的一种示例性实施例的滑环的驱动方式的简易示意图；
图9示出了本公开的另一种示例性实施例的滑环的驱动方式的简易示意图；以及
图10示出了本公开的再一种示例性实施例的滑环的驱动方式的简易示意图。
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：包括：支撑框架；可转动地安装在所述支撑框架上的滑环；驱动机构，安装在所述支撑框架上，并包括驱动轮；安装在所述支撑框架上的多个导向轮；以及围成封闭的周边的环形带，所述环形带与所述滑环、驱动轮和导向轮接触，使得所述驱动轮通过所述环形带驱动所述滑环和导向轮转动。所述滑环在所述周边的外侧与所述环形带接触。
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扫描设备的简易立体示意图；图4示出了图3所示的CT扫描设备的正视图，其中驱动机构的支撑座和电机未示出；图5示出了图4所示的CT扫描设备的侧视图，包括沿图4的A-A线的剖视图；图6示出了图5所示的A部分的放大示意图；图7示出了图5所示的B部分的放大示意图；图8示出了本公开的一种示例性实施例的滑环的驱动方式的简易示意图。
在一种示例性实施例中，参见图1-8，CT扫描设备100还包括：外部轮廓大致为拱形形状的支撑框架1，支撑框架1被支撑在底座13上；可转动地被支撑在支撑框架1上 的滑环2，检查通道400穿过滑环2；安装在所述支撑框架1上并包括驱动轮31的驱动机构3；安装在所述支撑框架1上的多个导向轮4；以及围成封闭的周边的环形带5，所述环形带5与所述滑环2、驱动轮31和导向轮4接触，使得所述驱动轮31通过所述环形带5驱动所述滑环2和导向轮4转动。所述滑环2在所述周边的外侧与所述环形带5接触。也就是说，滑环2位于由环形带5围成的封闭的环形空间的内侧。扫描装置包括滑环(转动架，rotatinggantry)2、安装在滑环2上的X线管101和探测器阵列102。
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，如图4和8所示，所述驱动轮31在所述周边的外侧与所述环形带5接触。这样，环形带至少与驱动轮的外圆环的一部分接触，而没有套在驱动轮上，方便了将环形带结合到滑环或者从滑环移除环形带的操作。
在一种示例性实施例中，如图4和8所示，所述导向轮包括环绕所述滑环设置的多个导向轮。所述多个导向轮在所述周边的内侧与所述环形带5接触，并分别位于多边形的顶点处。可以理解，每个导向轮都通过轴承机构与固定轴可转动地的连接。
进一步地，多个导向轮中的一个用做适用于张紧所述环形带5的张紧轮。在另一种示例性实施例中，CT扫描设备100还包括张紧轮45，所述张紧轮45适用于张紧所述环形带5。通过设置张紧轮，可以保持环形带5与驱动轮31和滑环2紧密地接触，增加了环形带与驱动轮和滑环之间的摩擦力。
在一种示例性实施例中，如图3-7所示，所述支撑框架1包括：安装在底座13上的外框架11；以及筒形的内框架12，所述内框架12通过多个连接件14固定在所述外框架12内，所述滑环2通过轴承机构15可转动地安装在所述内框架12内并从所述内框架12轴向地伸出，以形成伸出部21，所述伸出部21与所述环形带5结合。
在一种示例性实施例中，如图3-6所示，所述驱动机构3还包括：安装在所述外框架11上并面对所述内框架12的支撑座32；以及安装在所述支撑座32的与所述内框架 12相反的外侧的电机33，所述电机的输出轴34穿过所述支撑座32平行于所述滑环2的轴线延伸，所述驱动轮31在所述支撑座32的内侧安装在所述输出轴34上。
在一种示例性实施例中，如图3、4和8所示，所述多个导向轮包括分别位于一个四边形的顶点处的第一导向轮41、第二导向轮42、第三导向轮43和第四导向轮44。所述第二导向轮42和第三导向轮43之间的环形带5与所述驱动轮31结合，所述第二导向轮42和第三导向轮43可转动地安装在所述支撑座32的内侧。这样，在内框架12与支撑座32之间具有预定的空间，可以利用该预定的框架容纳驱动轮31、第二导向轮42和第三导向轮43，从而可以降低CT扫描设备100的厚度。
在一种示例性实施例中，如图3、4、7和8所示，所述第一导向轮41和第二导向轮42之间的环形带5与所述滑环2结合。也就是说，第二导向轮42适用于将环形带5抵靠在驱动轮31和滑环2上。所述第一导向轮41可转动地安装在所述连接件14中的一个上。所述第四导向轮44可转动地安装在所述连接件中的另一个上。也就是说，第一导向轮41和第四导向轮44分别可转动地安装在外框架11和内框架12之间的两个连接件14，第一导向轮41和第四导向轮44的转动轴与滑环2的轴线平行、并且不超出滑环2的延伸部21，以降低CT扫描设备100的厚度。
根据公开的一种示例性实施例，如图6-8所述，所述环形带5由多楔带制成，所述滑环2的伸出部21上设有与所述多楔带配合的槽轮22。多楔带的多个突出的齿形部与槽轮22的多个环形的凹槽配合，这样可以增加多楔带与槽轮之间的摩擦力，避免多楔带相对于滑环滑动。滑环2与多楔带的设有齿形部的一侧接触，导向轮与多楔带的与齿形部相对的一侧接触。也就是说，多楔带的设有齿形部的一侧朝向外部布置。可以理解，导向轮4和驱动轮31上也设有类似的槽轮。在一种可替换的实施例中，环形带5的截面为大致的三角形或者梯形。在另一种可替换的实施例中，环形带5为扁平带。
图9示出了本公开的另一种示例性实施例的滑环的驱动方式的简易示意图。
在一种示例性实施例中，如图9所示，所述导向轮包括环绕所述滑环设置的第一导向轮41、第二导向轮42、第三导向轮43和第四导向轮44，所述滑环在环形带5所围成的封闭的周边的外侧与所述环形带接触。所述第一导向轮41、第二导向轮42、第三导向轮43和第四导向轮44在所述周边的内侧与所述环形带5接触，并分别位于一个四边形的顶点处。CT扫描设备100还包括张紧轮45，所述张紧轮45适用于张紧所述环形带5。第三导向轮43和第四导向轮44可转动地安装在支撑框架上，所述第三导向轮43和 第四导向轮44之间的环形带5与所述驱动轮31结合。所述第一导向轮41和第二导向轮42之间的环形带5与所述滑环2结合。
在一种示例性实施例中，如图2和9所示，所述滑环2上安装有适用于发射X射线的X射线管101、以及与所述X射线管101径向相对的探测器阵列102。X射线管101和探测器阵列102在驱动机构3的驱动下环绕输送通道100转动，从而对在输送通道中移动的被检查目标300进行X射线扫描检查。所述环形带5与所述滑环2的位于X射线管101和探测器阵列102之间的部分外圆周接触。也就是说，环形带5不与滑环2的设置X射线管101和探测器阵列102的部分外圆周接触。这样，环形带的拆卸和安装不会影响X射线管101。
图10示出了本公开的再一种示例性实施例的滑环的驱动方式的简易示意图。
在一种示例性实施例中，如图10所示，所述导向轮包括环绕所述滑环设置的第一导向轮41和第二导向轮42，所述滑环在环形带5所围成的封闭的周边的外侧与所述环形带接触。所述第一导向轮41、第二导向轮42、和驱动轮31在所述周边的内侧与所述环形带5接触，并分别位于一个三角形的顶点处。CT扫描设备100还包括张紧轮45，所述张紧轮45适用于张紧所述环形带5。本领域的技术人员理解，可以根据需要，布置不同数量的导向轮，并将这些导向轮布置在不同的位置，但只要使得滑环在环形带5所围成的封闭的周边的外侧与所述环形带接触即可。
根据本公开实施例的CT扫描设备，滑环2在所述周边的外侧与所述环形带5接触，环形带5与所述滑环2、驱动轮31和导向轮4接触，使得所述驱动轮31通过所述环形带5驱动所述滑环2和导向轮4转动。作为主动轮的驱动轮31的外径可以制作得很小，而作为从动轮的滑环的外径保持不变，通过多个导向轮4的布置，可以驱动滑环绕轴线转动。滑环在所述周边的外侧与所述环形带接触，环形带至少与滑环外的圆环的一部分接触，而没有套在滑环上。这样，在安装、维修或者更换环形带时，无需完全拆除滑环外围的其它部件，例如保护壳体，可以显著缩短将环形带结合到滑环或者从滑环移除环形带的操作时间。同时由于导向轮的增加，使环形带变长，有利于降低环形带的磨损量，延长其寿命。
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 (13)

  1. 一种CT扫描设备(100)，包括：
    支撑框架(1)；
    滑环(2)，可转动地安装在所述支撑框架上；
    驱动机构(3)，安装在所述支撑框架上，并包括驱动轮(31)；
    导向轮(4)，安装在所述支撑框架上；以及
    环形带(5)，围成封闭的周边，所述环形带与所述滑环、驱动轮和导向轮接触，使得所述驱动轮通过所述环形带驱动所述滑环和导向轮转动，
    其中，所述滑环在所述周边的外侧与所述环形带接触。
  2. 根据权利要求1所述的CT扫描设备，其中，所述驱动轮在所述周边的外侧与所述环形带接触。
  3. 根据权利要求2所述的CT扫描设备，其中，所述导向轮包括环绕所述滑环设置的多个导向轮，所述多个导向轮在所述周边的内侧与所述环形带接触。
  4. 根据权利要求3所述的CT扫描设备，其中，所述多个导向轮中的一个用做适用于张紧所述环形带的张紧轮。
  5. 根据权利要求3所述的CT扫描设备，还包括张紧轮(45)，所述张紧轮适用于张紧所述环形带。
  6. 根据权利要求3-5中任一项所述的CT扫描设备，其中，所述支撑框架包括：
    外框架(11)；以及
    筒形的内框架(12)，所述内框架通过多个连接件固定在所述外框架内，所述滑环通过轴承机构可转动地安装在所述内框架内并从所述内框架轴向地伸出，以形成伸出部(21)，所述伸出部与所述环形带结合。
  7. 根据权利要求6所述的CT扫描设备，其中，所述驱动机构还包括：
    支撑座(32)，安装在所述外框架上并面对所述内框架；以及
    电机(33)，安装在所述支撑座的与所述内框架相反的外侧，所述电机的输出轴(34)穿过所述支撑座平行于所述滑环的轴线延伸，所述驱动轮在所述支撑座的内侧安装在所述输出轴上。
  8. 根据权利要求7所述的CT扫描设备，其中，
    所述多个导向轮包括分别位于一个四边形的顶点处的第一导向轮(41)、第二导向 轮(42)、第三导向轮(43)和第四导向轮(44)，
    所述第一导向轮和第二导向轮之间的环形带与所述驱动轮结合，
    所述第一导向轮和第二导向轮可转动地安装在所述支撑座的内侧。
  9. 根据权利要求8所述的CT扫描设备，其中，所述第一导向轮和第二导向轮之间的环形带与所述滑环结合，
    所述第一导向轮可转动地安装在所述连接件中的一个上。
  10. 根据权利要求9所述的CT扫描设备，其中，所述第四导向轮可转动地安装在所述连接件中的另一个上。
  11. 根据权利要求6-10中的任一项所述的CT扫描设备，其中，所述环形带由多楔带制成，所述滑环的伸出部上设有与所述多楔带配合的槽轮(22)。
  12. 根据权利要求1-11中的任一项所述的CT扫描设备，其中，所述滑环上安装有适用于发射X射线的X射线管、以及与所述X射线管径向相对的探测器阵列。
  13. 根据权利要求12所述的CT扫描设备，其中，
    所述环形带与所述滑环的位于X射线管和探测器阵列之间的部分外圆周接触。
PCT/CN2021/095512 2020-05-29 2021-05-24 Ct扫描设备 WO2021238861A1 (zh)

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