WO2021082385A1 - Security inspection apparatus capable of adapting to change in conveyance speed, and control method for same - Google Patents
Security inspection apparatus capable of adapting to change in conveyance speed, and control method for same Download PDFInfo
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- WO2021082385A1 WO2021082385A1 PCT/CN2020/088830 CN2020088830W WO2021082385A1 WO 2021082385 A1 WO2021082385 A1 WO 2021082385A1 CN 2020088830 W CN2020088830 W CN 2020088830W WO 2021082385 A1 WO2021082385 A1 WO 2021082385A1
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- Prior art keywords
- detector
- security inspection
- ray
- frame
- conveyor belt
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- 238000007689 inspection Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000005070 sampling Methods 0.000 claims abstract description 30
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 230000005855 radiation Effects 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims description 41
- 238000005259 measurement Methods 0.000 claims description 14
- 230000003044 adaptive effect Effects 0.000 claims description 12
- 230000005865 ionizing radiation Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000003384 imaging method Methods 0.000 abstract description 6
- 238000009434 installation Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000013016 damping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
Classifications
-
- G01V5/22—
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance
Definitions
- the invention belongs to the field of security inspection, and in particular relates to a security inspection equipment and a control method thereof that are adaptive based on changing the transmission speed.
- An adaptive security inspection device based on the change of transmission speed including: a basic component, a scanning unit and a speed measurement component.
- the speed measurement unit includes a speed measurement sensor installed at the inlet/outlet of the housing module; wherein the data signal in the speed measurement sensor is transmitted to the control module.
- the speed sensor is installed at the inlet/outlet of the frame, and is not limited to being arranged inside the frame, and can also be arranged on a transmission belt outside the frame.
- the housing module includes a frame with a " ⁇ "-shaped cross section erected on the conveyor belt, and an outer cover plate sleeved outside the frame;
- the radiation source is one or a combination of any number of ionizing radiation sources of gamma radiation, X-rays, or radioisotopes.
- the ray source includes an X-ray gantry which is arranged in a raised portion at a middle position on one side of the frame and is horizontally aligned with the transmission belt, and is fixedly installed on the X-ray gantry
- the X-ray machine is inclined at a predetermined angle;
- the beam chopping device is a collimator fixedly installed at the light exit of the X-ray machine.
- the speed sensor includes a photoelectric sensor generator and a receiver arranged at the inlet/outlet of the frame or on the conveyor belt.
- a shielding box is installed in the area between the X-ray machine and the detection box.
- a method for controlling an adaptive security inspection device based on changing the transmission speed includes the following steps:
- the control module corrects the light intensity of the ray emitted by the ray source and adjusts the sampling frequency of the detector according to the speed information;
- the S2 step further includes the following steps:
- the invention relates to an adaptive security inspection equipment based on the change of transmission speed and a control method thereof.
- the speed of the transmission belt is measured by two sets of photoelectric sensors arranged on both sides of the frame, and then the current of the X-ray machine is adjusted and the detection board is controlled.
- the sampling frequency solves the problem that the existing security inspection equipment cannot automatically respond after the transmission speed changes, resulting in blurred or even incapable imaging of the security inspection system.
- the beam intensity of the security inspection equipment and the sampling frequency of the detector can be automatically adjusted according to the speed of the conveyor belt, it is not limited to the traditional belt conveyor that matches it.
- the combined installation and matching use of transmission devices with different transmission speeds does not need to be limited to the fixed combined installation method of security inspection machine + tape conveyor.
- Figure 1 is a schematic diagram of the overall structure of the present invention.
- Figure 4 is a schematic diagram of the structure of the detection box of the present invention.
- Fig. 5 is a partial enlarged view of the auxiliary booster module of the present invention.
- the invention provides an adaptive security inspection equipment based on changing the transmission speed. It has the characteristics of strong adaptability, which is specifically expressed as: the security inspection equipment can be used with different types of transmission devices with different transmission speeds. It is not limited to the traditional matching tape conveyors, and can be used where inspections are required. For combined installation, there is no need to be limited to the fixed combined installation method of "security inspection machine + tape conveyor". Similarly, the user can reasonably adjust the speed of the conveyor belt according to the specific conditions such as the flow of people and the type of goods at the security inspection to improve the efficiency of the security inspection. At the same time, there will be no problems that the image of the security inspection system is blurred or even unable to be imaged due to the passing speed of the goods. .
- the security inspection system of the present invention is a passing inspection system, which includes a basic unit, a scanning unit and a speed measuring unit.
- the basic unit includes a conveyor belt 1 for conveying goods, and a housing module erected on the conveyor belt 1;
- the scanning unit includes a housing module housed in the housing module, placed at a predetermined tilt angle, and directed to the conveyor belt 1 at least one set of ray sources, a beam chopping device set at the exit of the ray source, a detector installed on the opposite side of each set of ray sources, and a control module 11 electrically connected to the detector and the ray source; speed measurement
- the unit includes a speed sensor installed at the inlet/outlet of the housing module; wherein the data signal in the speed sensor is transmitted to the control module 11.
- the security inspection device can use a single-source scanning mode or a multi-source scanning mode, specifically a scanning unit composed of a single radiation source, a detector, a circuit, and a control module 11, or a scanning unit with multiple sources.
- the radiation source in the present invention can be any number of ionizing radiation sources such as gamma radiation, X-rays, or radioisotopes.
- the X-ray transmission is adopted, and the tube voltage of the ray generator is between 80-300KV.
- the present invention relates to a number of embodiments, and the following disclosure is provided to enable those of ordinary skill in the art to implement the present invention.
- the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation or a specific orientation.
- the structure and operation cannot therefore be understood as a limitation of the present invention.
- the terms “first”, “second”, and “third” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.
- an adaptive security inspection device based on changes in transmission speed includes three parts: a basic unit, a scanning unit, and a speed measurement unit.
- the upper part of the threaded sleeve 42 is fixedly installed at the bottom of the support frame 15 or the frame 2, and the inner surface of the lower part is engraved with internal threads; the upper part of the screw 41 is sleeved inside the threaded sleeve 42, and is fixedly installed in the middle of the screw 41
- Adjusting the adjusting nut 43 by a tool such as a wrench can adjust the distance between the support plane and the bottom of the support frame 15 and the frame 2 up and down, that is, it can lift up and down.
- the fixing surface 51 of the fixing seat of the roller 5 and the supporting surface 52 are perpendicular to each other, the fixing surface 51 and the supporting frame 15 or the bottom of the frame 2 are connected by a pin rotation, and the supporting surface 52 and the roller 5 are connected by a pin rotation.
- the scroll wheel 5 scrolls in multiple directions. When the screw 41 and the threaded sleeve 42 are completely overlapped or the foot 4 is directly removed, the height of the roller 5 is greater than the height of the foot 4, and the roller 5 plays a supporting role.
- the security inspection equipment can be moved by the roller 5. Great convenience for transportation and installation.
- the height of the roller 5 is smaller than the foot 4, and the foot 4 plays a supporting role for fixing the security inspection equipment, and at the same time, it can be used to fine-tune the security inspection equipment and the transmission belt The height difference between 1.
- the scanning unit includes: an X-ray rack 6, an X-ray machine 7, a collimator 8, a detection box 9, a detection board 10, and a control module 11.
- the X-ray frame 6 is arranged in the raised part at the middle position on one side of the frame 2 and is flush with the conveyor belt 1.
- the X-ray machine 7 is fixedly installed on the X-ray frame 6 at a predetermined angle.
- a collimator 8 is fixedly installed at the light exit of the X-ray machine 7; as shown in Fig. 3, a detector is installed on the side far away from the X-ray machine 7 and on the top.
- L"-shaped detection box 9 in which multiple detection boards 10 are distributed at a predetermined angle; the control module 11 is arranged on the side of the X-ray machine 7 and is used to adjust the current and the current of the X-ray machine 7 Control the sampling frequency of the detection board 10.
- the imaging process of the scanning unit is as follows: X-ray machine 7 generates rays, which are collimated by collimator 8 to form a fan-shaped beam, which passes through the goods to be inspected, and receives optical signals on detection board 10, which are converted into electrical signals and transmitted Computer terminal analysis and imaging.
- lead curtains 13 are provided at both ends of the entrance and exit of the frame 2 above the conveyor belt 1; a shielding box 14 is provided in the area between the X-ray machine 7 and the detection box 9 on the top of the frame 2 . It is used to avoid the leakage of X-rays and ensure that the X-ray radiation dose around the security inspection equipment is in an extremely low safety range.
- the speed measurement component includes two sets of photoelectric sensors 12 generators and receivers arranged on both sides of the frame 2, and the photoelectric data in the photoelectric sensors 12 are transmitted to the control module 11 through electrical signals.
- the speed measuring components are respectively arranged at the two ends of the entrance and exit of the frame 2, but it is necessary to ensure that the lead curtain 13 does not block the generator and receiver of the photoelectric sensor 12 when it is carried by the goods to be tested.
- it is not limited to being arranged on or inside the frame 2 and can also be arranged on the conveyor belt 1 outside the frame 2.
- the basic unit, scanning unit, speed measuring unit or several of these components can be assembled together for modularization.
- the X-ray machine 7 and the collimator 8 are accommodated and fixed in the X-ray frame 6 to form a whole, as the ray source assembly
- the detection board 10 and other circuit structures are accommodated and fixed to form a whole, as the receiving assembly
- the supporting profile in the frame 2, the outer cover plate 3 and the sealing plate for sealing are connected in a detachable manner.
- the control module 11 and the speed measurement acts as two separate modular components. In the process of use and installation, it is only necessary to simply install and combine the modular components according to the engineering design drawings, and electrically connect each modular component to the control module 11.
Abstract
A security inspection apparatus capable of adapting to a change in conveyance speed, and a control method for the same, pertaining to the field of security inspection. The apparatus comprises three portions, a base unit, a scanning unit, and a speed detection assembly. The base unit comprises a conveyor belt (1) used to convey an article, and a housing module arranged above the conveyor belt (1). The scanning unit comprises at least one set of radiation sources accommodated within the housing module, placed obliquely at a pre-determined angle, and directed toward the conveyor belt (1), detectors respectively installed at opposite sides of the sets of radiation sources, and a control module (11) electrically connected to the detectors and the radiation sources. The speed detection unit comprises speed sensors installed at an entry/exit of the housing module. Speed detection is performed on the conveyor belt (1) by means of two sets of photoelectric sensors (12) disposed on two sides of a frame, and the control module adjusts a current of an X-ray machine (6) and controls a sampling frequency of a detection board. Further disclosed is a corresponding control method. The invention addresses the problem in which existing security inspection apparatuses are unable to automatically respond to a change in speed of a belt machine, and cause blurry imaging or imaging failures of security inspection systems.
Description
本发明属于安检领域，尤其是一种基于传输速度改变自适应的安检设备及其控制方法。The invention belongs to the field of security inspection, and in particular relates to a security inspection equipment and a control method thereof that are adaptive based on changing the transmission speed.
随着安全形势的日益严峻，要求安装安检设备的场合越来越多，也越来越复杂，而且不同场合的胶带的速度也不是固定不变，而是不断变化，在就要求X射线***的能够快速的适应不同的场所，并且满足胶带速度的不断变化，保障安检机的正常使用，而传统的X射线检查装置无法满足这一要求。With the increasingly severe security situation, more and more occasions require the installation of security inspection equipment, and more and more complex, and the speed of the tape on different occasions is not fixed, but constantly changing, and the X-ray system is required. It can quickly adapt to different places and meet the continuous change of tape speed to ensure the normal use of security inspection machines, but traditional X-ray inspection devices cannot meet this requirement.
一方面，现有的安检设备一般采用“安检机+胶带机”的固定组合安装，传输装置为安检设备的一部分，不能够任意替换，适配性能较差；另一方面，当传输带的速度发生变化时，安检设备不能自动的做出相应调整。例如：在地铁站、火车站等安检处，工作人员会根据安检人流和货物的具体情况，需要频繁调整传输带的速度，以提高安检效率；再如，在对快递分拣站，对快递进行安检时，根据待检测快递物品的种类，需要合理的控制传输装置的速度。由于安检设备内的X光机的出束强度和探测板的采样频率固定，当货物通过速度过快，会导致安检***成像模糊，甚至无法成像。On the one hand, the existing security inspection equipment is generally installed in a fixed combination of "security inspection machine + tape conveyor". The transmission device is a part of the security inspection equipment and cannot be replaced arbitrarily. The adaptation performance is poor; on the other hand, when the speed of the transmission belt is When there is a change, the security inspection equipment cannot automatically make corresponding adjustments. For example, at security checkpoints such as subway stations and train stations, the staff will frequently adjust the speed of the conveyor belt according to the specific conditions of the flow of people and goods at the security check to improve the efficiency of the security check; another example is the sorting station for the express delivery. During the security check, the speed of the transmission device needs to be reasonably controlled according to the types of express items to be detected. Since the beam intensity of the X-ray machine in the security inspection equipment and the sampling frequency of the detection board are fixed, when the cargo passes too fast, the image of the security inspection system will be blurred or even unable to image.
提供一种基于传输速度改变自适应的安检设备及其控制方法，以解决上述背景技术中所涉及的问题。Provided is a security inspection device and a control method thereof that are adaptive based on changing the transmission speed, so as to solve the problems involved in the above-mentioned background art.
一种基于传输速度改变自适应的安检设备，包括：基础组件、扫描单元和测速组件三部分组成。An adaptive security inspection device based on the change of transmission speed, including: a basic component, a scanning unit and a speed measurement component.
基础单元，包括用于货物输送的传输带，架设在所述传输带上的壳体模块。The basic unit includes a conveyor belt for cargo transportation, and a shell module erected on the conveyor belt.
扫描单元，包括容纳于所述壳体模块内、以倾斜预定角度安放、并指向于传输带的至少一组射线源，设置在所述射线源的出靶心处的斩束装置，安装在每组射线源对侧的探测器，以及与探测器和射线源电连接的控制模块。The scanning unit includes at least one set of ray sources housed in the housing module, placed at a predetermined tilt angle, and directed to the conveyor belt, and a beam chopping device arranged at the bullseye of the ray source, installed in each set A detector on the opposite side of the ray source, and a control module electrically connected to the detector and the ray source.
测速单元，包括安装在所述壳体模块的进/出口处的测速传感器；其中，所述测速传感器内的数据信号传输至控制模块。The speed measurement unit includes a speed measurement sensor installed at the inlet/outlet of the housing module; wherein the data signal in the speed measurement sensor is transmitted to the control module.
在进一步的实施例中，所述测速传感器安装在所述框架的进/出口处，且不局限于设置在所述框架内部，也可设置于所述框架外部的传输带上。In a further embodiment, the speed sensor is installed at the inlet/outlet of the frame, and is not limited to being arranged inside the frame, and can also be arranged on a transmission belt outside the frame.
在进一步的实施例中，所述传输带为皮带传输机、辊道传输、链条板传输机中的一种或其组合。In a further embodiment, the conveyor belt is one or a combination of a belt conveyor, a roller conveyor, and a chain plate conveyor.
在进一步的实施例中，所述壳体模块包括架设在所述传输带上且截面为“Π”字形的框架，以及套装在所述框架外的外罩板；In a further embodiment, the housing module includes a frame with a "Π"-shaped cross section erected on the conveyor belt, and an outer cover plate sleeved outside the frame;
在进一步的实施例中，所述射线源为伽马辐射、X射线或放射性同位素的任意数量的致电离辐射源中的一种或其组合。In a further embodiment, the radiation source is one or a combination of any number of ionizing radiation sources of gamma radiation, X-rays, or radioisotopes.
在进一步的实施例中，所述射线源包括设置在所述框架一侧的中部位置的凸起部内且与所述传输带水平对齐的X光机架，固定安装在所述X光机架上并倾斜预定角度的X光机；所述斩束装置为固定安装在所述X光机的出光口处的准直器。In a further embodiment, the ray source includes an X-ray gantry which is arranged in a raised portion at a middle position on one side of the frame and is horizontally aligned with the transmission belt, and is fixedly installed on the X-ray gantry The X-ray machine is inclined at a predetermined angle; the beam chopping device is a collimator fixedly installed at the light exit of the X-ray machine.
在进一步的实施例中，所述探测器包括安装远离所述X光机一侧的框架上、且与所述X光机对齐的探测盒，固定安装在所述探测盒内且以预定角度分布的多块探测板。In a further embodiment, the detector includes a detection box installed on a frame far from the X-ray machine and aligned with the X-ray machine, fixedly installed in the detection box and distributed at a predetermined angle Of multiple detection boards.
在进一步的实施例中，所述测速传感器包括设置在所述框架进/出口处或传输带上的光电感应器发生器和接收器。In a further embodiment, the speed sensor includes a photoelectric sensor generator and a receiver arranged at the inlet/outlet of the frame or on the conveyor belt.
在进一步的实施例中，所述传输带上方的框架两端设置有铅门帘。In a further embodiment, lead curtains are provided at both ends of the frame above the conveyor belt.
在进一步的实施例中，所述X光机与探测盒之间的区域安装有屏蔽盒。In a further embodiment, a shielding box is installed in the area between the X-ray machine and the detection box.
另一方面，一种基于传输速度改变自适应的安检设备的控制方法，包括如下步骤：On the other hand, a method for controlling an adaptive security inspection device based on changing the transmission speed includes the following steps:
S1、在启动上述安检设备后，切换至测速模式，对传输带进行测速，并将测试数据传输至控制模块；S1. After starting the above-mentioned security inspection equipment, switch to the speed measurement mode, measure the speed of the transmission belt, and transmit the test data to the control module;
S2、控制模块根据速度信息，修正射线源出射射线的光强和调整探测器的采样频率；S2. The control module corrects the light intensity of the ray emitted by the ray source and adjusts the sampling frequency of the detector according to the speed information;
S3、最后，切换至扫图模式，对待测货物进行检测。S3. Finally, switch to the scanning mode, and inspect the goods to be tested.
在进一步的实施例中，所述S2步骤又包括如下步骤：In a further embodiment, the S2 step further includes the following steps:
S21、计算传输带的传输速度v=L/（t
2-t
1)，其中，通过第一个光电感应器的时刻 t
1，通过第二个光电感应器的时刻为t
2，两光电感应器之间的距离为L；
S21. Calculate the transmission speed of the conveyor belt v=L/(t 2 -t 1 ), where the time t 1 when passing through the first photoelectric sensor and the time when passing through the second photoelectric sensor is t 2 , and the two photoelectric sensors The distance between the devices is L;
S22、计算探测器宽度投影到皮带中央的等效宽度为d＇=d·L
1/L
2；其中，探测器宽度为d，射线源靶点到皮带中央的距离为L
1，射线源靶点到探测器的距离为L
2；
S22. Calculate the equivalent width of the detector width projected to the center of the belt as d'=d·L 1 /L 2 ; where the width of the detector is d, the distance from the target point of the ray source to the center of the belt is L 1 , and the ray source target The distance from the point to the detector is L 2 ;
S23、计算探测器的空间频率为
f
1=
1
/d
＇；也就是说，探测器最多能够分辨空间频率为1
/d
＇的物体细节，使得图像的空间分辨力不小于该极限值
f
1
，不会进一步损失信息；
S23. Calculate the spatial frequency of the detector as f 1 = 1 /d ′ ; that is to say, the detector can distinguish the details of objects with a spatial frequency of 1 /d ′ at most, so that the spatial resolution of the image is not less than the limit value f 1 , Without further loss of information;
S24、探测器采样频率应为空间频率的alpha倍，即探测器每次采样，皮带的行走距离应当小于或等于为
d
＇
/alpha；故探测器的采样频率
f=(alpha
·
v)/
d
＇=（alpha·L）/（（t
2-t
1) ·
d
＇），其中，alpha为预设的常数；
S24. The sampling frequency of the detector should be alpha times the spatial frequency, that is, each time the detector samples, the walking distance of the belt should be less than or equal to d ' / alpha; therefore, the sampling frequency of the detector f= (alpha · v )/ d ＇ = (Alpha·L)/((t 2 -t 1 ) · d ＇ ), where alpha is a preset constant;
S25、由于探测器有最高采样频率
f
max，故进一步优化，得到分段函数，即探测器的采样频率
f=min［（alpha·L）/（（t
2-t
1)
·
d
＇），
f
max］;
S25. Since the detector has the highest sampling frequency f max , it is further optimized to obtain a piecewise function, that is, the sampling frequency of the detector f = min [(alpha·L)/((t 2 -t 1 ) · d ＇ ), f max ];
S26、需保证单位采样时间之内探测器接受到的辐射剂量不变，X射线出束强度也要随之改变，此时的出束强度为A=(A
0·
f)/
f
0，其中，A
0为初始出束强度，
f
0为探测器的初始采样频率；
S26. It is necessary to ensure that the radiation dose received by the detector within the unit sampling time does not change, and the X-ray beam intensity also changes accordingly. The beam intensity at this time is A=(A 0 · f) / f 0 , where , A 0 is the initial beam intensity, f 0 is the initial sampling frequency of the detector;
S27、由于X射线出束强度有最大值A
max，故进一步优化，得到分段函数，即X射线出束强度
A=min
[A=(A
0·
f）/
f
0, A
max]。
S27. Since the X-ray beam intensity has a maximum value A max , it is further optimized to obtain a piecewise function, that is, the X-ray beam intensity A = min [A=(A 0 · f )/ f 0 , A max ].
本发明涉及一种基于传输速度改变自适应的安检设备及其控制方法，通过设置在框架两侧的两组光电感应器对传输带进行测速，然后通过控制调节X光机的电流和控制探测板的采样频率，解决了现有安检设备在传输速度发生变化后，不能自动做出反应，导致安检***成像模糊，甚至无法成像的问题。同时，由于该安检设备的射线出束强度和探测器采样频率可根据传输带的速度自动调节，因此不用局限于传统与之相匹配的胶带机，可以在需要进行检测的地方，与不同类型、不同传输速度的传输装置组合安装、搭配使用，无需局限于安检机+胶带机的固定组合安装方式。The invention relates to an adaptive security inspection equipment based on the change of transmission speed and a control method thereof. The speed of the transmission belt is measured by two sets of photoelectric sensors arranged on both sides of the frame, and then the current of the X-ray machine is adjusted and the detection board is controlled. The sampling frequency solves the problem that the existing security inspection equipment cannot automatically respond after the transmission speed changes, resulting in blurred or even incapable imaging of the security inspection system. At the same time, because the beam intensity of the security inspection equipment and the sampling frequency of the detector can be automatically adjusted according to the speed of the conveyor belt, it is not limited to the traditional belt conveyor that matches it. The combined installation and matching use of transmission devices with different transmission speeds does not need to be limited to the fixed combined installation method of security inspection machine + tape conveyor.
图1是本发明的整体结构示意图。Figure 1 is a schematic diagram of the overall structure of the present invention.
图2是本发明的截面结构示意图。Fig. 2 is a schematic cross-sectional structure diagram of the present invention.
图3是本发明中测速单元和扫描单元的位置示意图。Fig. 3 is a schematic diagram of the positions of the speed measuring unit and the scanning unit in the present invention.
图4是本发明中探测盒的结构示意图。Figure 4 is a schematic diagram of the structure of the detection box of the present invention.
图5是本发明中辅助垫高模块的局部放大图。Fig. 5 is a partial enlarged view of the auxiliary booster module of the present invention.
图6是本发明中探测器等效宽度的原理示意图。Fig. 6 is a schematic diagram of the principle of the equivalent width of the detector in the present invention.
附图标记为：传输带1、框架2、外罩板3、地脚4、滚轮5、X光机架6、X光机7、准直器8、探测盒9、探测板10、控制模块11、光电感应器12、铅门帘13、屏蔽盒14、支撑架15、限高架16、辅助垫高模块A、螺杆41、螺纹套筒42、调节螺帽43、底板44、固定面51、支撑面52。The reference signs are: conveyor belt 1, frame 2, cover plate 3, foot 4, roller 5, X-ray frame 6, X-ray machine 7, collimator 8, detection box 9, detection board 10, control module 11 , Photoelectric sensor 12, lead curtain 13, shielding box 14, support frame 15, height limit frame 16, auxiliary padding module A, screw 41, threaded sleeve 42, adjusting nut 43, bottom plate 44, fixed surface 51, support surface 52.
在下文的描述中，给出了大量具体的细节以便提供对本发明更为彻底的理解。然而，对于本领域技术人员而言显而易见的是，本发明可以无需一个或多个这些细节而得以实施。在其他的例子中，为了避免与本发明发生混淆，对于本领域公知的一些技术特征未进行描述。In the following description, a lot of specific details are given in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present invention, some technical features known in the art are not described.
本发明提供一种基于传输速度改变自适应的安检设备。具有适配性强这一特性，具体表现为：该安检设备可与不同类型、不同传输速度的传输装置搭配使用，并不局限于传统与之相匹配的胶带机，可以在需要进行检测的地方进行组合安装，无需局限于“安检机+胶带机”的固定组合安装方式。同样的，使用人员可以根据安检人流和货物类型等具体情况，合理调整传输带的速度，提高安检效率，同时，不会出现因货物通过速度过快，导致安检***成像模糊，甚至无法成像的问题。The invention provides an adaptive security inspection equipment based on changing the transmission speed. It has the characteristics of strong adaptability, which is specifically expressed as: the security inspection equipment can be used with different types of transmission devices with different transmission speeds. It is not limited to the traditional matching tape conveyors, and can be used where inspections are required. For combined installation, there is no need to be limited to the fixed combined installation method of "security inspection machine + tape conveyor". Similarly, the user can reasonably adjust the speed of the conveyor belt according to the specific conditions such as the flow of people and the type of goods at the security inspection to improve the efficiency of the security inspection. At the same time, there will be no problems that the image of the security inspection system is blurred or even unable to be imaged due to the passing speed of the goods. .
本发明的安检***为穿行检测***，包括基础单元、扫描单元和测速单元。其中，基础单元包括用于货物输送的传输带1，架设在所述传输带1上的壳体模块；扫描单元包括容纳于所述壳体模块内、以倾斜预定角度安放、并指向于传输带1的至少一组射线源，设置在所述射线源的出靶心处的斩束装置，安装在每组射线源对侧的探测器，以及与探测器和射线源电连接的控制模块11；测速单元包括安装在所述壳体模块的进/出口处的测速传感器；其中，所述测速传感器内的数据信号传输至控制模块11。The security inspection system of the present invention is a passing inspection system, which includes a basic unit, a scanning unit and a speed measuring unit. Wherein, the basic unit includes a conveyor belt 1 for conveying goods, and a housing module erected on the conveyor belt 1; the scanning unit includes a housing module housed in the housing module, placed at a predetermined tilt angle, and directed to the conveyor belt 1 at least one set of ray sources, a beam chopping device set at the exit of the ray source, a detector installed on the opposite side of each set of ray sources, and a control module 11 electrically connected to the detector and the ray source; speed measurement The unit includes a speed sensor installed at the inlet/outlet of the housing module; wherein the data signal in the speed sensor is transmitted to the control module 11.
本领域技术人员应当理解的是，该安检设备可以使用单源扫描模式或多源扫描模式，具体为采用单一的辐射源、探测器、电路和控制模块11组成的扫描单元，也可以使用具有多个产生多组相互独立的辐射源和探测器的扫描单元。更具体的，本发明中的射线源可以为伽马辐射、X射线或放射性同位素等的任意数量的致电离辐射源。例如X射线透射、X射线背散射、毫米波、太赫兹、X射线CT等。本发明中优选地，采用的X射线透射，其射线发生器的管电压介于80～300KV之间。Those skilled in the art should understand that the security inspection device can use a single-source scanning mode or a multi-source scanning mode, specifically a scanning unit composed of a single radiation source, a detector, a circuit, and a control module 11, or a scanning unit with multiple sources. A scanning unit that generates multiple sets of independent radiation sources and detectors. More specifically, the radiation source in the present invention can be any number of ionizing radiation sources such as gamma radiation, X-rays, or radioisotopes. For example, X-ray transmission, X-ray backscatter, millimeter wave, terahertz, X-ray CT, etc. In the present invention, preferably, the X-ray transmission is adopted, and the tube voltage of the ray generator is between 80-300KV.
本发明涉及多个实施例，提供下面的公开以使本领域一般技术人员能够实现本发 明。在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“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发明和简化描述，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发明的限制。此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。The present invention relates to a number of embodiments, and the following disclosure is provided to enable those of ordinary skill in the art to implement the present invention. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.
如附图1～4所示，一种基于传输速度改变自适应的安检设备，包括：基础单元、扫描单元和测速单元三部分。As shown in Figures 1 to 4, an adaptive security inspection device based on changes in transmission speed includes three parts: a basic unit, a scanning unit, and a speed measurement unit.
其中，基础组件包括：传输带1、框架2、外罩板3、辅助垫高模块A。传输带1用于传输货物，并不局限于某种具体的传输带1，可以为各种类型的传输装置，例如皮带传输机、辊道传输、链条板传输机中的一种或其组合。框架2架设在所述传输带1上，截面为“Π”字形的箱体，在其外部安装有外罩板3，起到一个支架作用，并能够有效的减少X射线的泄漏。在所述框架2的前端的传输带1上设置有限高架16，用限制货物高度，保护该安检设备。Among them, the basic components include: the transmission belt 1, the frame 2, the outer cover 3, and the auxiliary booster module A. The conveyor belt 1 is used to convey goods, and is not limited to a specific conveyor belt 1, and can be various types of conveying devices, such as belt conveyors, roller conveyors, chain plate conveyors, or a combination thereof. The frame 2 is erected on the conveyor belt 1 and has a "Π"-shaped box in cross section. A cover plate 3 is installed on the outside of the frame 2 to serve as a support and can effectively reduce X-ray leakage. A limited elevation 16 is provided on the conveyor belt 1 at the front end of the frame 2 to limit the height of the cargo to protect the security inspection equipment.
作为一个优选方案，在所述框架2底部固定安装有多个辅助垫高模块A，用来调整该安检设备与传输带1之间的高度差。如附图5所示，具体包括：地脚4、安装在每个地脚4一侧的滚轮5，以及由若干固定用型材组成的支撑架15。在实际安装过程中，可根据该安检设备与传输带1之间的高度差，合理的选择不同型号的支撑架15。其中，地脚4包括：螺杆41、螺纹套筒42、调节螺帽43、橡胶减震垫和底板44。螺纹套筒42上部固定安装在所述支撑架15或框架2底部，下部的内表面刻有内螺纹；所述螺杆41的上部套装于所述螺纹套筒42内部，在螺杆41的中部固定安装有调节螺母，所述螺杆41的底部固定有橡胶减震垫、底板44，与支撑平面相接触。通过扳手等工具调节所述调节螺帽43，可以上下调整支撑平面与支撑架15、框架2底部之间的距离，即起到升降的作用。所述滚轮5固定座的固定面51与支撑面52相互垂直，其固定面51与支撑架15或框架2底部之间通过销轴转动连接，支撑面52与滚轮5通过销轴转动连接，实现滚轮5的多个方位滚动。所述螺杆41与螺纹套筒42完全重合或直接拆卸地脚4时，所述滚轮5的高度大于所述地脚4高度，滚轮5起到支撑作用，可以通过滚轮5移动该安检设备，极大的方便了运输和安装。所述螺纹杆与螺纹套筒42部分重合时，滚轮5高度小于所述地脚4，地脚4起到支撑作用，用于固定该安检设备，同时，可以用于微调该安检设备与传输带1之间的高度差。As a preferred solution, a plurality of auxiliary padding modules A are fixedly installed at the bottom of the frame 2 to adjust the height difference between the security inspection equipment and the conveyor belt 1. As shown in Fig. 5, it specifically includes: a foot 4, a roller 5 installed on one side of each foot 4, and a support frame 15 composed of a number of fixing profiles. In the actual installation process, according to the height difference between the security inspection equipment and the conveyor belt 1, different types of support frames 15 can be reasonably selected. Among them, the foot 4 includes: a screw 41, a threaded sleeve 42, an adjusting nut 43, a rubber damping pad, and a bottom plate 44. The upper part of the threaded sleeve 42 is fixedly installed at the bottom of the support frame 15 or the frame 2, and the inner surface of the lower part is engraved with internal threads; the upper part of the screw 41 is sleeved inside the threaded sleeve 42, and is fixedly installed in the middle of the screw 41 There is an adjusting nut, and the bottom of the screw 41 is fixed with a rubber damping pad and a bottom plate 44, which are in contact with the supporting plane. Adjusting the adjusting nut 43 by a tool such as a wrench can adjust the distance between the support plane and the bottom of the support frame 15 and the frame 2 up and down, that is, it can lift up and down. The fixing surface 51 of the fixing seat of the roller 5 and the supporting surface 52 are perpendicular to each other, the fixing surface 51 and the supporting frame 15 or the bottom of the frame 2 are connected by a pin rotation, and the supporting surface 52 and the roller 5 are connected by a pin rotation. The scroll wheel 5 scrolls in multiple directions. When the screw 41 and the threaded sleeve 42 are completely overlapped or the foot 4 is directly removed, the height of the roller 5 is greater than the height of the foot 4, and the roller 5 plays a supporting role. The security inspection equipment can be moved by the roller 5. Great convenience for transportation and installation. When the threaded rod and the threaded sleeve 42 are partially overlapped, the height of the roller 5 is smaller than the foot 4, and the foot 4 plays a supporting role for fixing the security inspection equipment, and at the same time, it can be used to fine-tune the security inspection equipment and the transmission belt The height difference between 1.
扫描单元包括：X光机架6、X光机7、准直器8、探测盒9、探测板10、控制模块11。X光机架6设置在所述框架2一侧的中部位置的凸起部内且与所述传输带1平齐位置，X光机7以预定角度倾斜着固定安装在所述X光机架6上，在所述X光机7的出光口处固定安装有准直器8；如附图3所示，在远离所述X光机7一侧和顶部安装探测器，其具体为截面呈“L”形的探测盒9，在所述探测盒9内以预定角度分布着多块探测板10；控制模块11设置在所述X光机7一侧，用于调节X光机7的电流和控制探测板10的采样频率。其中扫描单元的成像过程为：X光机7产生射线，由准直器8进行准直，形成一束扇形光束，穿过待检测货物，至探测板10接收光信号，转化为电信号，传输电脑终端分析、成像。The scanning unit includes: an X-ray rack 6, an X-ray machine 7, a collimator 8, a detection box 9, a detection board 10, and a control module 11. The X-ray frame 6 is arranged in the raised part at the middle position on one side of the frame 2 and is flush with the conveyor belt 1. The X-ray machine 7 is fixedly installed on the X-ray frame 6 at a predetermined angle. Above, a collimator 8 is fixedly installed at the light exit of the X-ray machine 7; as shown in Fig. 3, a detector is installed on the side far away from the X-ray machine 7 and on the top. L"-shaped detection box 9 in which multiple detection boards 10 are distributed at a predetermined angle; the control module 11 is arranged on the side of the X-ray machine 7 and is used to adjust the current and the current of the X-ray machine 7 Control the sampling frequency of the detection board 10. The imaging process of the scanning unit is as follows: X-ray machine 7 generates rays, which are collimated by collimator 8 to form a fan-shaped beam, which passes through the goods to be inspected, and receives optical signals on detection board 10, which are converted into electrical signals and transmitted Computer terminal analysis and imaging.
作为一个优选方案，在所述传输带1上方的框架2进出口的两端设置有铅门帘13；在所述X光机7与框架2顶部的探测盒9之间的区域设置有屏蔽盒14。用于避免X射线的泄漏，保证该安检设备的周围的X射线辐射剂量处于在一个极低的安全范围。As a preferred solution, lead curtains 13 are provided at both ends of the entrance and exit of the frame 2 above the conveyor belt 1; a shielding box 14 is provided in the area between the X-ray machine 7 and the detection box 9 on the top of the frame 2 . It is used to avoid the leakage of X-rays and ensure that the X-ray radiation dose around the security inspection equipment is in an extremely low safety range.
测速组件包括：设置在所述框架2两侧的两组光电感应器12发生器和接收器，所述光电感应器12内的光电数据通过电信号传输至控制模块11。其中，所述测速组件分别设置在所述框架2进出口的两端，但需保证所述铅门帘13在被待测货物带起时，不遮挡光电感应器12发生器和接收器。同时且不局限于设置于所述框架2上或其内部，也可设置于所述框架2外部的传输带1上。由于两组光电感应器12的位置固定，只需当检测同一个待测货物通过两组光电感应器12的时间差，即可计算出货物和传输带1的运输速度，同时，上述光电感应器12可兼顾计数功能。然后将速度等光电信息传输至控制模块11中。The speed measurement component includes two sets of photoelectric sensors 12 generators and receivers arranged on both sides of the frame 2, and the photoelectric data in the photoelectric sensors 12 are transmitted to the control module 11 through electrical signals. Wherein, the speed measuring components are respectively arranged at the two ends of the entrance and exit of the frame 2, but it is necessary to ensure that the lead curtain 13 does not block the generator and receiver of the photoelectric sensor 12 when it is carried by the goods to be tested. At the same time, it is not limited to being arranged on or inside the frame 2 and can also be arranged on the conveyor belt 1 outside the frame 2. Since the positions of the two sets of photoelectric sensors 12 are fixed, the transportation speed of the goods and the conveyor belt 1 can be calculated only when the time difference between the same goods to be tested passing through the two sets of photoelectric sensors 12 is detected. At the same time, the above-mentioned photoelectric sensors 12 Can take into account the counting function. Then the photoelectric information such as speed is transmitted to the control module 11.
在运输、安装过程中，可以将基础单元、扫描单元、测速单元或者其中的若干个组件组装在一起，进行模块化。例如：将X光机7、准直器8容纳、固定于X光机架6形成一个整体，作为射线源组件，探测板10以及其它电路结构容纳、固定于作为形成一个整体，作为接收组件，框架2、外罩板3中的支撑用的型材和密封用的封合板均采用可拆卸式的方式进行连接，在运输过程，彼此分离、相互独立，形成多个模块化组件，控制模块11和测速单元作为两个单独的模块化组件。在使用、安装过程中，只需按照工程设计图将模块化组件进行简单的安装和组合，将每一个模块化组件与控制模块11进行电连接。In the process of transportation and installation, the basic unit, scanning unit, speed measuring unit or several of these components can be assembled together for modularization. For example: the X-ray machine 7 and the collimator 8 are accommodated and fixed in the X-ray frame 6 to form a whole, as the ray source assembly, the detection board 10 and other circuit structures are accommodated and fixed to form a whole, as the receiving assembly, The supporting profile in the frame 2, the outer cover plate 3 and the sealing plate for sealing are connected in a detachable manner. During transportation, they are separated and independent from each other to form multiple modular components, the control module 11 and the speed measurement The unit acts as two separate modular components. In the process of use and installation, it is only necessary to simply install and combine the modular components according to the engineering design drawings, and electrically connect each modular component to the control module 11.
为了方便理解基于传输速度改变自适应的安检设备的技术方案，对其工作原理做出简要说明：在启动该安检设备后，首先切换至测速模式，先在传输带1上放置一个标准待测件，对传输带1进行测速，并将测试数据传输至控制模块11；控制模块11根据速度信息，信息修正X光机7的电流、调整X射线的光强和控制探测板10的采样频率，与之匹配；最后，切换至扫图模式，对待测货物进行检测。In order to facilitate the understanding of the technical solution of the adaptive security inspection equipment based on the transmission speed change, a brief description of its working principle is given: After starting the security inspection equipment, first switch to the speed measurement mode, and first place a standard DUT on the conveyor belt 1. , To measure the speed of the conveyor belt 1 and transmit the test data to the control module 11; the control module 11 corrects the current of the X-ray machine 7 according to the speed information, adjusts the intensity of the X-ray and controls the sampling frequency of the detection board 10, and Finally, switch to the scanning mode, and inspect the goods to be tested.
其中，更具体的控制和计算方法如下：在时刻t
1通过第一个光电感应器12后，在时刻t
2通过第二个光电感应器12，且二组光电传感器12的距离为L，可以计算出传输带1的传输速度v=L/（t
2-t
1)，并将速度信息传输至控制模块11中；如附图6所示，计算探测器宽度投影到皮带中央的等效宽度为d＇=d·L
1/L
2；其中，探测器宽度为d，射线源靶点到皮带中央的距离为L
1，射线源靶点到探测器的距离为L
2；也就是说，探测器最多能够分辨空间频率为探测器的空间频率为
f
1=
1
/d
＇的物体细节，使得图像的空间分辨力不小于该极限值
f
1
，不会进一步损失信息；而且，探测器采样频率应为空间频率的alpha倍，即探测器每次采样，皮带的行走距离应当小于或等于为
d
＇
/alpha；故探测器的采样频率
f=(alpha
·
v)/
d
＇=（alpha·L）/（（t
2-t
1) ·
d
＇），其中，alpha为任意常数，根据奈奎斯特准则，探测器采样频率应为空间频率的2倍，故通常有alpha=2，但也可以是其它的数值；需要说明的是，若允许一定程度的失真（例如，在皮带速度非常快的情况下），则采样频率可以小于上述公式计算值；若需要更高的图像细节，则采样频率可高于上述公式计算值；由于探测器都有一个最高采样频率
f
max，故进一步优化得到分段函数，即探测器的采样频率
f=min［（alpha·L）/（（t
2-t
1)
·
d
＇），
f
max］。探测器采样频率改变时，为保证成像质量，需保证单位采样时间之内探测器接受到的辐射剂量不变，X射线出束强度也要随之改变，此时的出束强度为A=(A
0·
f）/
f
0，其中，A
0为初始出束强度，
f
0
为探测器的初始采样频率；由于X射线出束强度有最大值A
max，故进一步优化，得到分段函数，即X射线出束强度
A=min
[A=(A
0·
f）/
f
0, A
max]。
Wherein the control and more specifically calculated as follows: by 1 at a time t after the first photoelectric sensor 12, at time t 2 through the second photoelectric sensors 12, and the two groups from the photosensor 12 is L, can Calculate the transmission speed of the conveyor belt 1 v=L/(t 2 -t 1 ), and transmit the speed information to the control module 11; as shown in Figure 6, calculate the equivalent width of the detector width projected to the center of the belt Is d'=d·L 1 /L 2 ; where the width of the detector is d, the distance from the target point of the ray source to the center of the belt is L 1 , and the distance from the target point of the ray source to the detector is L 2 ; that is, The detector can at most distinguish the details of the object whose spatial frequency is the detector's spatial frequency f 1 = 1 /d ′ , so that the spatial resolution of the image is not less than the limit value f 1 , without further loss of information; moreover, the detector sampling The frequency should be alpha times the spatial frequency, that is, each time the detector is sampled, the walking distance of the belt should be less than or equal to d ＇ / alpha; therefore, the sampling frequency of the detector f= (alpha · v )/ d ＇ = (alpha· L)/((t 2 -t 1 ) · d ＇ ), where alpha is an arbitrary constant. According to the Nyquist criterion, the sampling frequency of the detector should be twice the spatial frequency, so there is usually alpha=2, but It can also be other values; it should be noted that if a certain degree of distortion is allowed (for example, when the belt speed is very fast), the sampling frequency can be less than the value calculated by the above formula; if higher image details are required, then The sampling frequency can be higher than the value calculated by the above formula; since the detector has a highest sampling frequency f max , the segment function is further optimized, that is, the sampling frequency of the detector f = min [(alpha·L)/((t 2 -t 1 ) · d ' ), f max ]. When the sampling frequency of the detector changes, in order to ensure the imaging quality, it is necessary to ensure that the radiation dose received by the detector within the unit sampling time does not change, and the X-ray beam intensity also changes accordingly. The beam intensity at this time is A=( A 0 · f )/ f 0 , where A 0 is the initial beam intensity and f 0 is the initial sampling frequency of the detector; since the X-ray beam intensity has a maximum value A max , it is further optimized to obtain a piecewise function, That is, the X-ray beam intensity A =min [A=(A 0 · f )/ f 0 , A max ].
另外需要说明的是，在上述具体实施方式中所描述的各个具体技术特征，在不矛盾的情况下，可以通过任何合适的方式进行组合。为了避免不必要的重复，本发明对各种可能的组合方式不再另行说明。In addition, it should be noted that the various specific technical features described in the foregoing specific embodiments can be combined in any suitable manner, provided that there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not described separately in the present invention.
Claims (10)
- 一种基于传输速度改变自适应的安检设备，其特征在于，包括：An adaptive security inspection device based on changing the transmission speed, which is characterized in that it comprises:基础单元，包括用于货物输送的传输带，架设在所述传输带上的壳体模块；The basic unit includes a conveyor belt for cargo transportation, and a housing module erected on the conveyor belt;扫描单元，包括容纳于所述壳体模块内、以倾斜预定角度安放、并指向于传输带的至少一组射线源，设置在所述射线源的出靶心处的斩束装置，安装在每组射线源对侧的探测器，以及与探测器和射线源电连接的控制模块；The scanning unit includes at least one set of ray sources housed in the housing module, placed at a predetermined tilt angle, and directed to the conveyor belt, and a beam chopping device arranged at the bullseye of the ray source, installed in each set The detector on the opposite side of the ray source, and the control module electrically connected with the detector and the ray source;测速单元，包括安装在所述壳体模块的进/出口处的测速传感器；其中，所述测速传感器内的数据信号传输至控制模块。The speed measurement unit includes a speed measurement sensor installed at the inlet/outlet of the housing module; wherein the data signal in the speed measurement sensor is transmitted to the control module.
- 根据权利要求1所述的基于传输速度改变自适应的安检设备，其特征在于，所述传输带为皮带传输机、辊道传输、链条板传输机中的一种或其组合；所述壳体模块包括架设在所述传输带上且截面为“Π”字形的框架，以及套装在所述框架外的外罩板。The self-adaptive security inspection equipment based on the change of transmission speed according to claim 1, wherein the conveyor belt is one or a combination of a belt conveyor, a roller conveyor, and a chain plate conveyor; the housing The module includes a frame with a "Π"-shaped cross section erected on the conveyor belt, and an outer cover plate sleeved outside the frame.
- 根据权利要求1所述的基于传输速度改变自适应的安检设备，其特征在于，所述射线源为伽马辐射、X射线或放射性同位素的任意数量的致电离辐射源中的一种或其组合。The adaptive security inspection device based on changing transmission speed according to claim 1, wherein the ray source is one or a combination of any number of ionizing radiation sources of gamma radiation, X-rays, or radioisotopes .
- 根据权利要求2所述的基于传输速度改变自适应的安检设备，其特征在于，所述射线源包括设置在所述框架一侧的中部位置的凸起部内且与所述传输带水平对齐的X光机架，固定安装在所述X光机架上并倾斜预定角度的X光机；所述斩束装置为固定安装在所述X光机的出光口处的准直器；所述探测器包括安装远离所述X光机一侧的框架上、且与所述X光机对齐的探测盒，固定安装在所述探测盒内且以预定角度分布的多块探测板。The self-adaptive security inspection device based on the change of transmission speed according to claim 2, wherein the ray source comprises an X which is arranged in the convex part at the middle position of one side of the frame and is horizontally aligned with the transmission belt. An optical frame, an X-ray machine fixedly installed on the X-ray frame and inclined at a predetermined angle; the beam chopping device is a collimator fixedly installed at the light exit of the X-ray machine; the detector It includes a detection box installed on a frame far away from the X-ray machine and aligned with the X-ray machine, and a plurality of detection boards fixedly installed in the detection box and distributed at a predetermined angle.
- 根据权利要求2所述的基于传输速度改变自适应的安检设备，其特征在于，所述测速传感器安装在所述框架的进/出口处，且不局限于设置在所述框架内部，也可设置于所述框架外部的传输带上。The self-adaptive security inspection device based on the change of transmission speed according to claim 2, wherein the speed sensor is installed at the entrance/exit of the frame, and is not limited to being arranged inside the frame, and can also be arranged On the conveyor belt outside the frame.
- 根据权利要求5所述的基于传输速度改变自适应的安检设备，其特征在于，所述测速传感器包括设置在所述框架进/出口处或传输带上的光电感应器发生器和接收器。The self-adaptive security inspection device based on the change of transmission speed according to claim 5, wherein the speed sensor includes a photoelectric sensor generator and a receiver arranged at the entrance/exit of the frame or on the transmission belt.
- 根据权利要求2所述的基于传输速度改变自适应的安检设备，其特征在于，所述传输带上方的框架两端设置有铅门帘。The self-adaptive security inspection device based on the change of transmission speed according to claim 2, wherein the two ends of the frame above the transmission belt are provided with lead curtains.
- 根据权利要求4所述的基于传输速度改变自适应的安检设备，其特征在于，所述X光机与探测盒之间的区域安装有屏蔽盒。The self-adaptive security inspection device based on the change of transmission speed according to claim 4, wherein a shielding box is installed in the area between the X-ray machine and the detection box.
- 如权利要求1～8任一项所述的基于传输速度改变自适应的安检设备的控制方法，其特征在于，包括如下步骤：The control method of a security inspection device based on transmission speed change adaptive according to any one of claims 1 to 8, characterized in that it comprises the following steps:S1、在启动上述安检设备后，切换至测速模式，对传输带进行测速，并将测试数据传输至控制模块；S1. After starting the above-mentioned security inspection equipment, switch to the speed measurement mode, measure the speed of the transmission belt, and transmit the test data to the control module;S2、控制模块根据速度信息，修正射线源出射射线的光强和调整探测器的采样频率；S2. The control module corrects the light intensity of the ray emitted by the ray source and adjusts the sampling frequency of the detector according to the speed information;S3、最后，切换至扫图模式，对待测货物进行检测。S3. Finally, switch to the scanning mode, and inspect the goods to be tested.
- 根据权利要求9所述的基于传输速度改变自适应的安检设备的控制方法，其特征在于，所述S2步骤包括如下步骤：The method for controlling adaptive security inspection equipment based on changing the transmission speed according to claim 9, wherein the step S2 includes the following steps:S21、计算传输带的传输速度v=L/（t 2-t 1)，其中，通过第一个光电感应器的时刻 t 1，通过第二个光电感应器的时刻为t 2，两光电感应器之间的距离为L； S21. Calculate the transmission speed of the conveyor belt v=L/(t 2 -t 1 ), where the time t 1 when passing through the first photoelectric sensor and the time when passing through the second photoelectric sensor is t 2 , and the two photoelectric sensors The distance between the devices is L;S22、计算探测器宽度投影到皮带中央的等效宽度为d＇=d·L 1/L 2；其中，探测器宽度为d，射线源靶点到皮带中央的距离为L 1，射线源靶点到探测器的距离为L 2； S22. Calculate the equivalent width of the detector width projected to the center of the belt as d'=d·L 1 /L 2 ; where the width of the detector is d, the distance from the target point of the ray source to the center of the belt is L 1 , and the ray source target The distance from the point to the detector is L 2 ;S23、计算探测器的空间频率为 f 1= 1 /d ＇；也就是说，探测器最多能够分辨空间频率为1 /d ＇的物体细节，使得图像的空间分辨力不小于极限值 f 1 ，不会进一步损失信息； S23. Calculate the spatial frequency of the detector as f 1 = 1 /d ′ ; that is to say, the detector can distinguish details of objects with a spatial frequency of 1 /d ′ at most, so that the spatial resolution of the image is not less than the limit value f 1 , No further loss of information;S24、探测器采样频率应为空间频率的alpha倍，即探测器每次采样，皮带的行走距离应当小于或等于为 d ＇/alpha；故探测器的采样频率 f=(alpha ·v)/ d ＇=（alpha·L）/（（t 2-t 1) · d ＇），其中，alpha为预设的常数； S24. The sampling frequency of the detector should be alpha times the spatial frequency, that is, each time the detector is sampled, the walking distance of the belt should be less than or equal to d '/ alpha; therefore, the sampling frequency of the detector f= (alpha ·v )/ d ＇ = (Alpha·L)/((t 2 -t 1 ) · d ＇ ), where alpha is a preset constant;S25、由于探测器有最高采样频率 f max，故进一步优化，得到分段函数，即探测器的采样频率 f=min［（alpha·L）/（（t 2-t 1) · d ＇）， f max］； S25. Since the detector has the highest sampling frequency f max , it is further optimized to obtain a piecewise function, that is, the sampling frequency of the detector f = min [(alpha·L)/((t 2 -t 1 ) · d ＇ ), f max ];S26、须保证单位采样时间之内探测器接受到的辐射剂量不变，X射线出束强度也要随之改变，此时的出束强度为A=(A 0· f)/ f 0，其中，A 0为初始出束强度， f 0为探测器的初始采样频率； S26. It must be ensured that the radiation dose received by the detector within the unit sampling time remains unchanged, and the X-ray beam intensity should also change accordingly. The beam intensity at this time is A=(A 0 · f) / f 0 , where , A 0 is the initial beam intensity, f 0 is the initial sampling frequency of the detector;S27、由于X射线出束强度有最大值A max，故进一步优化，得到分段函数，即X射线出束强度 A=min [A=(A 0· f）/ f 0, A max]。 S27. Since the X-ray beam intensity has a maximum value A max , it is further optimized to obtain a piecewise function, that is, the X-ray beam intensity A = min [A=(A 0 · f )/ f 0 , A max ].
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| CN201911045067.6A CN110764155A (en) | 2019-10-30 | 2019-10-30 | Self-adaptive security check equipment based on transmission speed change and control method thereof |
| CN201911045067.6 | 2019-10-30 |
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| CN110764155A (en) * | 2019-10-30 | 2020-02-07 | 南京全设智能科技有限公司 | Self-adaptive security check equipment based on transmission speed change and control method thereof |
| CN111346839A (en) * | 2020-03-12 | 2020-06-30 | 江苏警官学院 | X-ray detection device for dangerous goods |
| CN111382293B (en) * | 2020-03-25 | 2023-04-25 | 浙江大华技术股份有限公司 | Security check control method and security check equipment |
| CN113759432A (en) * | 2021-07-20 | 2021-12-07 | 浙江华视智检科技有限公司 | Security check system, data acquisition rate adjusting method and article information detection method |
| CN113884513B (en) * | 2021-08-19 | 2024-01-30 | 浙江华视智检科技有限公司 | Security check machine and cargo detection method |
| CN117647546B (en) * | 2024-01-29 | 2024-05-07 | 浙江华视智检科技有限公司 | Security check imaging method and related device |
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