WO2020010967A1 - 辐射检查系统 - Google Patents

辐射检查系统 Download PDF

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Publication number
WO2020010967A1
WO2020010967A1 PCT/CN2019/089900 CN2019089900W WO2020010967A1 WO 2020010967 A1 WO2020010967 A1 WO 2020010967A1 CN 2019089900 W CN2019089900 W CN 2019089900W WO 2020010967 A1 WO2020010967 A1 WO 2020010967A1
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radiation
platform
detector
inspection system
frame
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PCT/CN2019/089900
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English (en)
French (fr)
Inventor
于昊
王伟珍
李营
马媛
宋全伟
史俊平
李荐民
李玉兰
陈志强
李元景
张丽
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同方威视技术股份有限公司
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Publication of WO2020010967A1 publication Critical patent/WO2020010967A1/zh

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    • G01V5/232—

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  • the present disclosure relates to the field of vehicle radiation detection, and in particular, to a radiation inspection system.
  • the related small vehicle inspection system adopts a top-type system.
  • the radiation source is installed on a supporting structure, the supporting structure is fixed on the ground, and the detector module is installed below the ground.
  • a top-view scan image is generated by the radiation source and the detector module.
  • the related detection system can only scan one car at a time, the remaining vehicles need to wait in line, and the passing rate is low.
  • One of the objectives of the present disclosure is to propose a radiation inspection system to provide the efficiency of radiation detection of existing vehicles.
  • the present disclosure provides a radiation inspection system including:
  • Radiation device for providing radiation for inspection of a vehicle
  • a frame wherein the ray device and the detector are provided on the frame;
  • the frame is configured to be movable relative to the platform, so that the object to be detected passes a detection channel between the radiation device and the detector.
  • the frame is configured to be movable.
  • the frame is mounted with a walking mechanism.
  • the radiation inspection system further includes:
  • a rail the frame is provided on the rail and can walk along the rail.
  • the radiation inspection system further includes:
  • the delivery mechanism includes a reciprocating platform.
  • the framework includes:
  • Beam provided with said ray device
  • a bottom beam provided with said detector
  • An upright column connects the beam and the bottom beam, and the upright column is also provided with the detector.
  • the platform includes:
  • a bearing portion configured to be capable of placing at least two of the objects to be detected side by side;
  • the supporting portion is provided on the bearing portion and protrudes downward from the bearing portion.
  • the bottom beam is provided with a gap, and the support portion is provided in the gap; at least a part of the bottom beam is located below the load-bearing part and the probe is installed in the part A detector mounted on the bottom beam on each side of the gap and a detector positioned on the upright column on the side to scan the object to be detected on the side together.
  • the platform further includes:
  • the reinforced structure is fixed to both the load bearing portion and the supporting portion.
  • the detection device further includes:
  • a calibration detector is provided on the bottom beam, and the calibration detector is configured to receive rays from the ray device that do not pass through the object to be detected and pass through the bearing portion.
  • the object to be detected includes a vehicle, a container, a luggage or a package.
  • At least one of the frame and the platform is set in a movable form, so that the frame and the platform can move relative to each other, so that when the vehicle is not moving, the detection device can also scan the object to be detected, thereby making When multiple objects to be detected are placed on the platform, scanning can also be achieved.
  • the throughput of the objects to be detected in the radiation inspection system is high, and the scanning efficiency is high.
  • FIG. 1 is a schematic perspective view of a radiation inspection system according to an embodiment of the present disclosure
  • FIG. 2 is a schematic front view of a radiation inspection system according to an embodiment of the present disclosure
  • FIG. 3 is a schematic top view of a radiation inspection system according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic front view of a radiation inspection system according to another embodiment of the present disclosure.
  • An embodiment of the present disclosure provides a radiation inspection system including a detection device 1, a frame 2, and a platform 3.
  • the detection device 1 includes a radiation device 11 and a detector 12.
  • the radiation device 11 provides X-rays for inspecting the vehicle, and the detector 12 is configured to receive radiation emitted from the radiation device 11. Both the radiation device 11 and the detector 12 are provided on the frame 2.
  • the platform 3 is used to park the object 4 to be detected.
  • the frame 2 is configured to be movable so that the object 4 to be detected passes the detection channel between the ray device 11 and the detector 12, that is, the object 4 to be detected reaches the beam surface of the detection device 1.
  • the beam surface refers to a surface formed by a beam of radiation emitted by the radiation device 11 for scanning an object to be detected.
  • the radiation device 11 includes a radiation source and a collimator, and the beam surface refers to a surface formed by a beam of radiation emitted by the radiation source and used to scan the object to be detected after collimation.
  • the X-ray device 11 provides X-rays for inspecting a vehicle.
  • the X-ray device 11 is, for example, an accelerator, an isotope source, an X-ray machine, or the like.
  • the object to be detected 4 is, for example, a container, a suitcase, a package, a passenger car, or a passenger car.
  • the driver Before scanning, the driver parked each of the inspected vehicles in different areas of the platform 3. As shown in FIG. 3, the platform 3 can park at least two small vehicles at the same time, taking 4 as an example. After stopping, the driver left the scanning area of platform 3.
  • the detection device 1 scans the vehicles parked on the platform 3 at the same time, which can greatly improve the passing rate.
  • the platform 3 can be extended to park and scan more vehicles at the same time.
  • the frame 2 and the platform 3 move relative to each other. If the platform 3 is fixed on the ground, the frame 2 can be moved back and forth on the track or on the ground, from one end of the vehicle to the other, to generate a complete scanned image.
  • the frame 2 carries the ray device 11 and the detector 12 moving along the track or on the ground, from one end of the platform 3 to the other end.
  • the radiation device 11 and the detector 12 remain relatively stationary, and the object to be detected 4 is parked on the platform 3 and remains stationary. After the scan is completed, the driver will leave their platform 3 in their respective cars.
  • the platform 3 can be moved forward and backward, and the object 4 to be detected passes through the passage formed by the frame 2 to generate a scanned image.
  • At least one of the frame 2 and the platform 3 is provided in a movable form.
  • the frame 2 is movable, and the platform 3 is fixed, so that the detection device 1 completes the lengthwise detection of the object 4 to be detected.
  • the frame 2 is fixed and the platform 3 is movable.
  • the frame 2 is movable and the platform 3 is also movable.
  • the object to be detected 4 and the platform 3 remain relatively stationary during the scanning process.
  • the frame 2 is movable and the platform 3 is fixed as an example to introduce the structure of the radiation inspection system.
  • the platform 3 is fixed to the ground, and the frame 2 moves on the track or the ground. This method occupies less space, and the frame 2 is easier to move than the platform 3.
  • the frame 2 is mounted with a walking mechanism 6.
  • the walking mechanism 6 includes wheels, crawlers, and the like, and the frame 2 can drive the detection device 1 to move together.
  • the walking mechanism 6 is installed at the bottom of the frame 2.
  • the walking mechanism 6 drives the frame 2 to move.
  • the frame 2 can be moved on the track, or it can be moved on the ground.
  • the system is equipped with a correction device to reduce or even avoid the chance of the frame 2 and the platform 3 colliding with each other.
  • the radiation inspection system further includes a track, and the frame 2 is provided on the track and can walk along the track.
  • the frame 2 is provided with a structure that matches the structure of the track.
  • the frame 2 includes a cross beam 21, a bottom beam 22, and a post 23.
  • the beam 21 is provided with a ray device 11;
  • the bottom beam 22 is provided with a detector 12;
  • the pillar 23 connects the beam 21 and the bottom beam 22, and the pillar 23 is also provided with a detector 12.
  • the radiation device 11 is provided on the cross beam 21 and has the advantage of imaging from a top angle of view of a small vehicle inspection system.
  • the detectors 12 on the pillar 23 and the bottom beam 22 are roughly arranged in an L shape.
  • the detector 12 on the uppermost pillar 23 can just directly receive the radiation emitted by the radiation device 11, and the radiation passes through the highest point of the object 4 to be detected, and The to-be-detected object 4 is not penetrated, and all of the to-be-detected object 4 are located in the beam beam range.
  • the highest point of the vehicle is determined from the radiation received by the detector 12.
  • the X-ray device 11 During scanning, the X-ray device 11 emits X-rays, penetrates the object 4 to be detected, and the detection equipment 1 located at the column 23 and the bottom beam 22 receives X-rays and converts them into output signals.
  • the controller obtains data from the detection equipment 1 and generates numbers in real time. Image signal.
  • the platform 3 includes a bearing portion 31 and a support portion 32.
  • the width of the carrying portion 31 is greater than the width of the two to-be-detected objects 4, that is, the carrying portion 31 is configured to place at least two to-be-detected objects 4 side by side.
  • the support portion 32 is provided at the middle in the width direction of the bearing portion 31 and projects downward from the bearing portion 31.
  • the support portion 32 is provided at the middle in the width direction of the bearing portion 31 so that the platform 3 is balanced by the force after the object to be detected 4 is parked on the platform 3.
  • the supporting portion 32 protrudes downward from the supporting portion 31, so that a part of the frame 2 can be located below the to-be-detected object 4 so as to form a top view, that is, the radiation device 11 is above the to-be-detected object 4 and the detector 12 is on the to-be-detected object 4 View from below.
  • the bottom beam 22 is provided with a notch 24, and a support portion 32 is provided in the notch 24. At least a part of the bottom beam 22 is located below the load-bearing portion 31 and a detector 12 is installed in the portion. The detector 12 installed on the bottom beam 22 on each side of the gap 24 and the detector 12 on the side pillar 23 are scanned together. This side describes the object 4 to be detected.
  • the platform 3 further includes a reinforcing structure, and the reinforcing structure is fixed to the bearing portion 31 and the supporting portion 32.
  • the detection device 1 further includes a calibration detector 5, the calibration detector 5 is provided on the bottom beam 22, and the calibration detector 5 is used to receive the radiation device 11 The emitted rays do not pass through the object to be detected 4 and pass through the bearing portion 31.
  • the signals received by the two calibration detectors 5 can be used to detect the enhanced structure of the platform 3 The effect of the object 4 scan is corrected.
  • the radiation inspection system further includes a transport mechanism for transporting the platform 3, and the platform 3 is provided on the transport mechanism.
  • the frame 2 is fixed on the ground, and the platform 3 carries a to-be-detected object 4 through a detection channel formed by the detection device 1 on the frame 2 to generate a scanned image.
  • the platform 3 is, for example, a reciprocating platform, etc.
  • the platform 3 moves back and forth between two set positions.
  • the bottom beam 22 of the frame 2 is lower than the bearing portion 31, and the bottom beam 22 need not be provided with a gap 24.
  • the transport mechanism includes a reciprocating platform.
  • the radiation inspection system further includes a controller that corrects the scanned image obtained by the to-be-detected object 4 based on the scanned image obtained when the platform 3 is unloaded, reducing or even eliminating the scanned image of the platform 3 Impact.
  • the radiation inspection system may integrate a license plate recognition system at the entrance of the platform 3 to bind the images obtained by each vehicle with the license plate.
  • the radiation inspection system further includes a ramp platform, and the vehicle travels on or off the platform 3 through the ramp platform.

Abstract

一种辐射检查系统，包括射线装置（11）、探测器（12）、框架（2）和平台（3）。射线装置（11）和探测器（12）均设于框架（2），平台（3）用于停放待检测物（4）。其中，框架（2）配置为能相对于平台（3）移动，以使得待检测物（4）通过射线装置（11）和探测器（12）之间的检测通道。将框架（2）与平台（3）至少其中之一设置为可运动的形式，提高了扫描效率。

Description

辐射检查系统
本申请是以CN申请号为201810757450.3，申请日为2018年7月11日的申请为 基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及车辆辐射检测领域，具体涉及一种辐射检查系统。
背景技术
相关的小型车辆检查系统采用顶式系统，射线源安装在支撑结构上，支撑结构固定于地面，探测器模块安装在地面以下，通过射线源和探测器模块，生成顶视角扫描图像。工作时，司机将被检车辆停在传送装置上，随后司机和乘客下车，离开扫描区域，系统开始扫描。传送装置拖动被检车辆经过扫描通道，当被检车辆到达系统束流面时，系统自动对整个车辆进行扫描。扫描结束后，司机和乘客可以返回车上，驾车离开扫描设备。
发明人发现，相关技术中至少存在下述问题：相关的检测系统每次只能扫描一辆汽车，其余车辆需要排队等待，通过率较低。
发明内容
本公开的其中一个目的是提出一种辐射检查系统，用以提供现有车辆辐射检测的效率。
本公开提供一种辐射检查系统，包括：
射线装置，用于提供对车辆检查的射线；
探测器，用于接收从所述射线装置发出的射线；
框架，所述射线装置和所述探测器均设于所述框架；以及
平台，用于停放待检测物；
其中，所述框架被配置为能相对于所述平台移动，以使得所述待检测物通过所述射线装置和所述探测器之间的检测通道。
在一个或一些实施例中，所述框架被设置为可移动的。
在一个或一些实施例中，所述框架安装有行走机构。
在一个或一些实施例中，辐射检查系统还包括：
轨道，所述框架设于所述轨道且能沿着所述轨道行走。
在一个或一些实施例中，辐射检查系统还包括：
用于输送所述平台的输送机构，所述平台设于所述输送机构。
在一个或一些实施例中，所述输送机构包括往复平台。
在一个或一些实施例中，所述框架包括：
横梁；设有所述射线装置；
底梁，设有所述探测器；以及
立柱，连接所述横梁和所述底梁，且所述立柱也设有所述探测器。
在一个或一些实施例中，所述平台包括：
承载部，所述承载部被配置为能并排放置至少两个所述待检测物；以及
支撑部，设于所述承载部且朝下突出于所述承载部。
在一个或一些实施例中，所述底梁设有缺口，所述缺口内设有所述支撑部；所述底梁的至少其中一部分位于所述承载部的下方且该部分安装有所述探测器，位于所述缺口每侧的所述底梁上安装的探测器以及位于该侧所述立柱上的探测器共同扫描该侧所述待检测物。
在一个或一些实施例中，平台还包括：
加强结构，与承载部和支撑部均固定。
在一个或一些实施例中，所述检测设备还包括：
校正探测器，设于所述底梁，所述校正探测器用于接收所述射线装置发出的不经过所述待检测物且经过所述承载部的射线。
在一个或一些实施例中，所述待检测物包括车辆、集装箱、行李箱或包裹。
上述技术方案，将框架与平台至少其中之一设置为可运动的形式，进而使得框架与平台能相对运动，以使得在车辆不动的情况下，检测设备也能扫描待检测物，进而使得在平台上放置多个待检测物时，也能实现扫描，辐射检查系统的待检测物通过率高，扫描效率高。
附图说明
图1为本公开一实施例提供的辐射检查系统立体示意图；
图2为本公开一实施例提供的辐射检查系统主视示意图；
图3为本公开一实施例提供的辐射检查系统俯视示意图；
图4为本公开另一实施例提供的辐射检查系统主视示意图。
具体实施方式
下面结合图1～图4对本公开提供的技术方案进行更为详细的阐述。
本公开实施例提供一种辐射检查系统，包括检测设备1、框架2以及平台3。检测设备1包括射线装置11和探测器12。射线装置11提供用于对车辆检查的X射线，探测器12用于接收从射线装置11发出的射线。射线装置11和探测器12都设于框架2。平台3用于停放待检测物4。其中，框架2被配置为能移动的，以使得待检测物4通过射线装置11和探测器12之间的检测通道，即使得待检测物4到达检测设备1的束流面。
束流面是指射线装置11发出的用于扫描待检测物体的一束射线形成的面。在一些实施例中，射线装置11包括射线源和准直器，束流面是指射线源发出的、经过准直器准直后用于扫描待检测物的一束射线形成的面。
射线装置11提供用于对车辆进行检查的X射线，射线装置11比如为加速器、同位素源、X光机等。
待检测物4比如为集装箱、行李箱、包裹、乘用车或客车。扫描前，司机将各个被检车辆停放在平台3的不同区域内，如图3所示，平台3可同时停放至少两个小型车辆，以4辆为例。停好后司机离开平台3的扫描区域。检测设备1对停放在平台3上的车辆同时进行扫描，可大幅度提高通过率。可根据场地的情况，延长平台3，可同时停放并扫描更多车辆。
扫描过程中，框架2和平台3相对运动，若平台3固定于地面，框架2可在轨道上或地面上前后移动，从车辆的一端移动到另一端，生成完整的扫描图像。框架2承载射线装置11和探测器12沿着轨道或在地面上移动，从平台3的一端移动到另一端。当整个扫描过程结束时，待检测物4的完整图像就产生了。
在一些实施例中，射线装置11和探测器12保持相对静止，待检测物4停放在平台3上保持不动。扫描结束后，司机将驾驶各自的汽车离开平台3。
若框架2固定于地面，平台3可前后移动，承载待检测物4通过框架2构成的通道，生成扫描图像。
框架2与平台3至少其中之一设置为可移动的形式。比如框架2是可动的，平台 3是固定的，以使得检测设备1完成对待检测物4长度方向的检测。或者，框架2是固定的，平台3是可动的。或者，框架2是可动的、平台3也是可动的。
在一些实施例中，不管采用上述哪种相对运动方式，在扫描过程中，待检测物4与平台3保持相对静止。
此处以框架2是可动的、平台3是固定的为例，介绍辐射检查系统的结构。如图2和图3所示，平台3固定于地面，框架2在轨道或地面上移动。该方式占用空间小，且框架2相较于平台3更便于移动。
在一个或一些实施例中，框架2安装有行走机构6。行走机构6包括轮子、履带等，框架2能带动检测设备1共同移动。行走机构6安装于框架2底部，行走机构6带动框架2移动，框架2可在轨道上移动，也可能在地面上移动。当框架2在地面上移动时，系统配备纠偏装置，降低甚至避免了框架2和平台3互相碰撞的几率。
或者，采用下述方式实现框架2的移动。辐射检查系统还包括轨道，框架2设于轨道且能沿着轨道行走。框架2设有与轨道的结构相配合的结构。
参见图1，在一个或一些实施例中，框架2包括横梁21、底梁22以及立柱23。横梁21设有射线装置11；底梁22设有探测器12；立柱23连接横梁21和底梁22，且立柱23也设有探测器12。
射线装置11设于横梁21，具有小型车辆检查系统顶视角成像的优点。
立柱23和底梁22上的探测器12大致排列成L形，立柱23上位于最上方的探测器12刚好能直接接受射线装置11发出的射线，该射线经过待检测物4的最高点，并不穿透待检测物4，待检测物4全部位于射线束流范围内。根据该探测器12接收的射线确定了车辆的最高点。
扫描时，射线装置11发出X射线，穿透待检测物4，位于立柱23和底梁22的检测设备1接收X射线并转换为输出信号，由控制器从检测设备1获取数据并实时生成数字图像信号。
参见图1，在一个或一些实施例中，平台3包括承载部31和支撑部32。承载部31的宽度大于两辆待检测物4的宽度，即承载部31被配置为能并排放置至少两个待检测物4。支撑部32设于承载部31的宽度方向的中间且朝下突出于承载部31。支撑部32设于承载部31的宽度方向的中间可使得在待检测物4停放到平台3上之后，平台3受力平衡。支撑部32朝下突出于承载部31，则使得框架2的一部分可位于待检测物4下方，以便于形成顶视图，即射线装置11在待检测物4上方、探测器12在待 检测物4下方的视图。
参见图1和图2，在一个或一些实施例中，底梁22设有缺口24，缺口24内设有支撑部32。底梁22的至少其中一部分位于承载部31的下方且该部分安装有探测器12，位于缺口24每侧的底梁22上安装的探测器12以及位于该侧立柱23上的探测器12共同扫描该侧所述待检测物4。
为了平台3更加稳固且有更好的承载力，在一些实施例中，平台3还包括加强结构，加强结构与承载部31和支撑部32均固定。
加强结构会对图像产生一定影响，为了减少该影响，在一些实施例中，检测设备1还包括校正探测器5，校正探测器5设于底梁22，校正探测器5用于接收射线装置11发出的不经过待检测物4且经过承载部31的射线。
由于平台3下方最靠近中央的两个校正探测器5所接收到的射线不会经过待检测物4，所以通过这两个校正探测器5接收到的信号，可对平台3的加强结构对待检测物4扫描产生的影响进行校正。
下面介绍平台3运动、框架2不动的实现方式。
参见图4，在一个或一些实施例中，辐射检查系统还包括用于输送平台3的输送机构，平台3设于输送机构。框架2固定于地面，平台3承载待检测物4通过框架2上检测设备1形成的检测通道，生成扫描图像。
平台3比如为往复平台等，平台3在两个设定位置之间往复移动。
参见图4，框架2的底梁22低于承载部31，底梁22无须设置缺口24。
参见图4，在一个或一些实施例中，输送机构包括往复平台。
在一个或多个实施例中，辐射检查系统还包括控制器，控制器根据平台3空载时获得的扫描图像对待检测物4所获得的扫描图像进行校正，减少甚至消除了平台3对扫描图像的影响。
在一个或多个实施例中，辐射检查系统可在平台3的入口处集成车牌识别系统，将各辆车获得的图像与车牌绑定。
在一个或多个实施例中，若平台3高于地面，辐射检查系统还包括坡台，车辆经过坡台行驶上或离开平台3。
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公 开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、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。
最后应当说明的是:以上实施例仅用以说明本公开的技术方案而非对其限制；尽管参照较佳实施例对本公开进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本公开的具体实施方式进行修改或者对部分技术特征进行等同替换；而不脱离本公开技术方案的精神，其均应涵盖在本公开请求保护的技术方案范围当中。

Claims (12)

  1. 一种辐射检查系统，包括：
    射线装置(11)，用于提供对车辆检查的射线；
    探测器(12)，用于接收从所述射线装置(11)发出的射线；
    框架(2)，所述射线装置(11)和所述探测器(12)均设于所述框架(2)；以及
    平台(3)，用于停放待检测物(4)；
    其中，所述框架(2)被配置为能相对于所述平台(3)移动，以使得所述待检测物(4)通过所述射线装置(11)和所述探测器(12)之间的检测通道。
  2. 根据权利要求1所述的辐射检查系统，其中，所述框架(2)被设置为可移动的。
  3. 根据权利要求2所述的辐射检查系统，其中，所述框架(2)安装有行走机构(6)。
  4. 根据权利要求2所述的辐射检查系统，其中，还包括：
    轨道，所述框架(2)设于所述轨道且能沿着所述轨道行走。
  5. 根据权利要求1所述的辐射检查系统，其中，还包括：
    用于输送所述平台(3)的输送机构，所述平台(3)设于所述输送机构。
  6. 根据权利要求5所述的辐射检查系统，其中，所述输送机构包括往复平台。
  7. 根据权利要求1所述的辐射检查系统，其中，所述框架(2)包括：
    横梁(21)；设有所述射线装置(11)；
    底梁(22)，设有所述探测器(12)；以及
    立柱(23)，连接所述横梁(21)和所述底梁(22)，且所述立柱(23)也设有所述探测器(12)。
  8. 根据权利要求7所述的辐射检查系统，其中，所述平台(3)包括：
    承载部(31)，所述承载部(31)被配置为能并排放置至少两个所述待检测物(4)；以及
    支撑部(32)，设于所述承载部(31)且朝下突出于所述承载部(31)。
  9. 根据权利要求8所述的辐射检查系统，其中，所述底梁(22)设有缺口(24)，所述缺口(24)内设有所述支撑部(32)；所述底梁(22)的至少其中一部分位于所述承载部(31)的下方且该部分安装有所述探测器(12)，位于所述缺口(24)每侧的所述底梁(22)上安装的探测器(12)以及位于该侧所述立柱(23)上的探测器(12)共同用于扫描该侧所述待检测物(4)。
  10. 根据权利要求8的辐射检查系统，其中，平台(3)还包括：
    加强结构，与承载部(31)和支撑部(32)均固定。
  11. 根据权利要求10所述的辐射检查系统，其中，所述检测设备(1)还包括：
    校正探测器(5)，设于所述底梁(22)，所述校正探测器(5)用于接收所述射线装置(11)发出的不经过所述待检测物(4)且经过所述承载部(31)的射线。
  12. 根据权利要求1所述的辐射检查系统，其中，所述待检测物(4)包括车辆、集装箱、行李箱或包裹。
PCT/CN2019/089900 2018-07-11 2019-06-04 辐射检查系统 WO2020010967A1 (zh)

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