CN109358371B - Luggage article safety inspection method of CT security inspection machine - Google Patents
Luggage article safety inspection method of CT security inspection machine Download PDFInfo
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- 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
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Abstract
The invention discloses a luggage article safety inspection method of a CT (computed tomography) security inspection machine, which comprises the following steps of: s10: conveying the luggage articles towards a first direction, and performing flat scanning by adopting a CT detection device; s20: judging whether the luggage is dangerous goods, if so, executing step S21, otherwise, executing step S40; s21: conveying the luggage articles towards a second direction, performing three-dimensional scanning by adopting a CT detection device, and executing the step S30; s30: confirming whether the luggage is dangerous goods, if so, executing the step S31, otherwise, executing the step S40; s31: the security personnel take corresponding measures; s40: the next baggage item continues to be scanned. The first direction and the second direction are opposite to each other. The invention can be applied to occasions with larger pedestrian volume and can consider the detection efficiency of luggage articles and the accuracy of dangerous article detection.
Description
Technical Field
The invention relates to a safety inspection method in public places, in particular to a luggage article safety inspection method of a CT (computed tomography) security inspection machine.
Background
The security inspection machine is widely applied to airports, railway stations, bus stations, government buildings, embassy halls, conference centers, exhibition centers, hotels, shopping malls, large-scale activities, post offices, schools, logistics industries, industrial detection and the like, and the traditional X-ray security inspection equipment utilizes X-rays to penetrate through an object to be attenuated and carries out dangerous goods identification in a projection perspective mode.
In order to further improve the accuracy of dangerous goods judgment, an X-ray Computed Tomography (CT) technology is adopted in the prior art, the CT technology is an advanced non-destructive detection and evaluation technology, and the size, the shape, the internal structure and the density information of a checked luggage article can be obtained by performing multi-angle projection perspective scanning on the luggage article and utilizing a three-dimensional reconstruction algorithm. However, since the transportation speed of the baggage item is low in the CT scan, the baggage item may be congested in a case where the traffic of people is large. If the scanning is performed only by adopting a flat scanning mode of general X-rays, the obtained images have the problem of article image overlapping, so that the accurate identification of dangerous articles is influenced to a certain extent, and the difficulty of identification is increased.
Disclosure of Invention
The invention aims to provide a luggage article safety inspection method of a CT security inspection machine, which can give consideration to both the detection efficiency of luggage articles and the accuracy of dangerous article detection.
The technical scheme provided by the invention is as follows:
a luggage article safety inspection method of a CT security inspection machine comprises the following steps: s10: conveying the luggage articles towards a first direction, and performing flat scanning by adopting a CT detection device; s20: judging whether the luggage is dangerous goods, if so, executing step S21, otherwise, executing step S40; s21: conveying the luggage articles towards a second direction, performing three-dimensional scanning by adopting a CT detection device, and executing the step S30; s30: confirming whether the luggage is dangerous goods, if so, executing the step S31, otherwise, executing the step S40; s31: the security personnel take corresponding measures; s40: the next baggage item continues to be scanned. The first direction and the second direction are opposite to each other.
According to the method, firstly, a CT detection device is adopted to carry out flat scanning on the luggage articles, whether the luggage articles are dangerous articles or not is subjected to primary screening through the flat scanning, if the luggage articles are judged to be non-dangerous articles, the next luggage articles are scanned continuously in a flat scanning mode, if the luggage articles are judged to be dangerous articles, the luggage articles are immediately stopped from being transmitted and reversely transmitted, at the moment, the CT detection device adopts a three-dimensional scanning mode to scan the luggage articles suspected to be dangerous articles, more accurate and clear image information is further obtained to be used for a security check worker to judge, corresponding measures are taken to process if the luggage articles are further confirmed to be dangerous articles, and if the luggage articles are further confirmed to be non-dangerous articles, the next luggage articles are scanned continuously in a flat scanning mode. It can be seen from the above whole process that only the luggage articles considered as dangerous articles in the primary screening process can reverse the corresponding luggage articles for three-dimensional scanning with a slower conveying speed, so that the detection efficiency of the luggage articles is improved, and the accuracy of dangerous article detection can be improved because the dangerous articles are further confirmed by adopting the three-dimensional scanning, the images displayed in front of the security check personnel are clearer, and the security check personnel can more easily and accurately judge whether the luggage articles are dangerous articles.
Preferably, the conveying speed of the luggage in the step S10 is V1SaidThe conveying speed of the luggage items in step S21 is V2，V1＞V2(ii) a And the acquisition speed of the CT detection device in the step S10 is T1The acquisition speed of the CT detection device in step S21 is T2，T2＞T1。
Because the conveying speed of the luggage articles is slower and the acquisition speed of the CT detection device is faster during three-dimensional scanning, wherein the slower conveying speed means that the distance between the layers of the obtained images is smaller, and the faster acquisition speed means that the number of the projections is larger, thereby improving the image quality and being more beneficial to safety inspection personnel to distinguish dangerous articles.
Preferably, the step S10 is preceded by steps S00 and S01; the step S00: acquiring and judging whether three-dimensional scanning is directly carried out on the luggage item, if so, executing step S01, otherwise, executing step S10; the step S01: the baggage item is transported in a first direction and three-dimensionally scanned using a CT inspection device, and said step S30 is performed.
Whether a CT detection device is selected to directly start three-dimensional scanning to scan luggage articles can be selected to perform fine scanning on each luggage article in a place with small passenger flow, so that the accuracy of dangerous article detection is guaranteed, and the safety of public places is guaranteed.
Preferably, the conveying speed of the luggage in the step S10 is V1The conveying speed of the luggage item in the step S01 is V3，V1＞V3(ii) a And the acquisition speed of the CT detection device in the step S10 is T1The acquisition speed of the CT detection device in step S01 is T3，T3＞T1。
The luggage article safety inspection method of the CT security inspection machine provided by the invention can bring the following beneficial effects:
the method disclosed by the invention can combine the detection efficiency of luggage and the accuracy of dangerous goods detection in occasions with large pedestrian volume, reduce the crowds congestion condition, perform primary screening on dangerous goods and then perform fine scanning through three-dimensional scanning, provide finer images for security personnel, and reduce the false judgment rate of the security personnel.
Drawings
The above features, technical features, advantages and implementations of the method for security inspection of baggage items in a CT security inspection machine will be further explained in the following description of preferred embodiments in a clearly understandable manner with reference to the accompanying drawings.
FIG. 1 is a schematic illustration of a forward feed of a CT security inspection machine;
FIG. 2 is a schematic illustration of a reverse feed of a CT security inspection machine;
FIG. 3 is a schematic diagram of a CT detection device;
fig. 4 is a schematic view of the CT detection apparatus of fig. 3 in another orientation.
The reference numbers illustrate:
1-a security inspection machine shell, 2-a transmission device, 3-an imaging plane of a CT detection device, 4-an X-ray source, 5-an X-ray detector, 6-a stator, 7-a rotor and 8-a stator fixing support.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product.
[ example 1 ]
Embodiment 1 discloses a specific implementation manner of a baggage item security inspection method of a CT security inspection machine, which includes the following steps:
s10: the luggage articles are conveyed towards a first direction, namely the forward direction in fig. 1, and the flat scanning is carried out by adopting the CT detection device, because the imaging time of the detector of the CT security inspection machine is greatly shorter than that of the detector of the common security inspection machine, the conveying speed of the luggage articles of the X-ray detector used by the CT detection device is more than several times of the conveying speed of the common X-ray security inspection machine, if the two are scanned by using the flat scanning mode at the same time, the conveying speed of the CT detection device can be increased by several times, and the possibility of congestion at places with large flow of people is greatly reduced;
s20: judging whether the luggage articles are dangerous articles or not, if so, executing step S21, otherwise, executing step S40, primarily screening the luggage articles, and if not, directly scanning the subsequent luggage articles;
s21: conveying the luggage articles towards a second direction, namely, reversely conveying the luggage articles as shown in fig. 2, performing three-dimensional scanning by using a CT detection device, and executing a step S30, wherein the three-dimensional scanning is performed by using the CT detection device;
s30: confirming whether the luggage article is a dangerous article, if so, executing the step S31, otherwise, executing the step S40, and in the step, further judging whether the luggage article is a dangerous article according to the obtained fine image, so that security personnel can more accurately judge whether the luggage article is a dangerous article;
s31: the security personnel take corresponding measures;
s40: and continuously scanning the next luggage item by adopting a flat scanning mode.
Wherein, the first direction and the second direction are opposite to each other.
Specifically, the conveying speed of the baggage item in step S10 is V1The conveying speed of the luggage item in step S21 is V2，V1＞V2The distance between layers of the image obtained by three-dimensional scanning is smaller.
And the acquisition speed of the CT detection device in the step S10 is T1The acquisition speed of the CT detection device in step S21 is T2，T2＞T1The number of projections in three-dimensional scanning is more, the image quality of three-dimensional scanning is improved, and safety inspection personnel can distinguish dangerous goods more conveniently.
Specifically, as shown in fig. 1 to 4, the CT security check machine to which the security check method of the present embodiment is applied includes a security check machine housing 1, and a transmission device 2 penetrating through the security check machine housing 1, wherein the baggage item is placed on the transmission device 2 for transportation, the CT detection device is installed in the security check machine housing 1, and the transmission device 2 penetrates through the CT detection device, and the CT detection device is used for performing a horizontal scan or a three-dimensional scan on the baggage item on the transmission device 2, wherein an imaging plane 3 of the CT detection device is located at a middle position of the security check machine housing 1.
As shown in fig. 3-4, the CT detection device includes an X-ray source 4 for emitting X-rays, an X-ray detector 5 for receiving X-rays, and the X-ray source 4 and the X-ray detector 5 are both disposed on a rotor 7, the rotor 7 is sleeved on a stator 6, the stator 6 is connected inside the safety inspection machine housing 1 through a stator fixing support 8, specifically, the stator fixing support 8 is respectively disposed at two ends of the stator 6, the cross section of the stator fixing support 8 is U-shaped, the opening directions of the two stator fixing supports 8 are opposite, the bottom of the stator fixing support 8 is provided with a fixing hole, the fixing hole is fixedly connected inside the safety inspection machine housing 1 through the matching of a bolt and a nut, and the rotor 7 can rotate along its own axis.
When the actual security check machine carries out dangerous goods safety inspection:
when the rotor 7 is not rotating, the X-ray source 4 and the X-ray detector 5 sweep the baggage item.
When the rotor 7 rotates, the X-ray source 4 and the X-ray detector 5 scan the baggage item in three dimensions.
Specifically, the rotor 7 and the stator 6 are both annular, and the baggage items pass through the rotor 7 and the stator 6 during the conveying process of the conveying device 2.
It can be seen from whole safety inspection process, this embodiment is just can reverse the luggage article that corresponds and carry out the slower three-dimensional scanning of conveying speed at the luggage article that thinks as the hazardous articles when prescreening, has improved the detection efficiency of luggage article and whether owing to adopt three-dimensional scanning further to confirm to be the hazardous articles, can improve the accuracy that the hazardous articles detected, and the image that shows in the presence of the safety inspection personnel is more clear, and the safety inspection personnel are changeed accurate judgement luggage article and whether be the hazardous articles.
[ example 2 ]
s00: acquiring and judging whether three-dimensional scanning is directly carried out on the luggage item, if so, executing step S01, otherwise, executing step S10;
step S01: conveying the baggage item in a first direction, i.e. the forward direction in fig. 1, and performing three-dimensional scanning on the baggage item using the CT detection apparatus, and performing step S30;
s10: conveying the luggage articles in a first direction, namely the forward direction in fig. 1, and performing flat scanning by using a CT detection device;
s20: judging whether the luggage articles are dangerous articles or not, if so, executing step S21, otherwise, executing step S40, primarily screening the luggage articles, and if not, directly scanning the subsequent luggage articles;
s21: conveying the luggage articles towards a second direction, namely, reversely conveying the luggage articles as shown in fig. 2, performing three-dimensional scanning by using a CT detection device, and executing a step S30, wherein the three-dimensional scanning is performed by using the CT detection device;
s30: confirming whether the luggage article is a dangerous article, if so, executing the step S31, otherwise, executing the step S40, and in the step, further judging whether the luggage article is a dangerous article according to the obtained fine image, so that security personnel can more accurately judge whether the luggage article is a dangerous article;
s31: the security personnel take corresponding measures;
s40: the next item of baggage continues to be scanned in the same manner as required in step S00.
Wherein, the first direction and the second direction are opposite to each other.
Specifically, the conveying speed of the baggage item in step S10 is V1The conveying speed of the luggage item in step S21 is V2The conveying speed of the luggage item in step S01 is V3，V1＞V2And V is1＞V3So that the three-dimensional scanning obtains the imageThe distance between the layers of the image is smaller.
And the acquisition speed of the CT detection device in the step S10 is T1The acquisition speed of the CT detection device in step S21 is T2The acquisition speed of the CT detection device in step S01 is T3，T3＞T1And T2＞T1The quantity of projections in three-dimensional scanning is more, the image quality of three-dimensional scanning is improved, and safety inspection personnel can distinguish dangerous goods more conveniently.
Specifically, as shown in fig. 1 to 4, the CT security check machine to which the security check method of the present embodiment is applied includes a security check machine housing 1, and a transmission device 2 penetrating through the security check machine housing 1, wherein the baggage item is placed on the transmission device 2 for transportation, the CT detection device is installed in the security check machine housing 1, and the transmission device 2 penetrates through the CT detection device, and the CT detection device is used for performing a horizontal scan or a three-dimensional scan on the baggage item on the transmission device 2, wherein an imaging plane 3 of the CT detection device is located at a middle position of the security check machine housing 1.
As shown in fig. 3-4, the CT detection device includes an X-ray source 4 for emitting X-rays, an X-ray detector 5 for receiving X-rays, and the X-ray source 4 and the X-ray detector 5 are both disposed on a rotor 7, the rotor 7 is sleeved on a stator 6, the stator 6 is connected inside the safety inspection machine housing 1 through a stator fixing support 8, specifically, the stator fixing support 8 is respectively disposed at two ends of the stator 6, the cross section of the stator fixing support 8 is U-shaped, the opening directions of the two stator fixing supports 8 are opposite, the bottom of the stator fixing support 8 is provided with a fixing hole, the fixing hole is fixedly connected inside the safety inspection machine housing 1 through the matching of a bolt and a nut, and the rotor 7 can rotate along its own axis.
When the actual security check machine carries out dangerous goods safety inspection:
when the rotor 7 is not rotating, the X-ray source 4 and the X-ray detector 5 sweep the baggage item.
When the rotor 7 rotates, the X-ray source 4 and the X-ray detector 5 scan the baggage item in three dimensions.
Specifically, the rotor 7 and the stator 6 are both annular, and the baggage items pass through the rotor 7 and the stator 6 during the conveying process of the conveying device 2.
Compared with the safety inspection method of the embodiment 1, the safety inspection method of the embodiment selects whether the CT detection device directly starts three-dimensional scanning to scan the luggage items, and starts three-dimensional scanning if the CT detection device starts three-dimensional scanning, so that each luggage item can be finely scanned in a place with small passenger flow, the accuracy of dangerous goods detection is ensured, and the safety of public places is ensured. When the flow of people is not large, the misjudgment of security check personnel on dangerous goods is further reduced.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A luggage article safety inspection method of a CT security inspection machine is characterized by comprising the following steps:
s00: acquiring and judging whether three-dimensional scanning is directly carried out on the luggage item, if so, executing step S01, otherwise, executing step S10;
s01: conveying the luggage items along a first direction, performing three-dimensional scanning on the luggage items by adopting a CT detection device, and executing the step S30;
s10: conveying the luggage articles towards a first direction, and performing flat scanning by adopting a CT detection device;
s20: judging whether the luggage is dangerous goods, if so, executing step S21, otherwise, executing step S40;
s21: conveying the luggage articles towards a second direction, performing three-dimensional scanning by adopting a CT detection device, and executing the step S30;
s30: confirming whether the luggage item is a dangerous item, if so, executing step S31, otherwise, executing step S40;
s31: the security personnel take corresponding measures;
s40: continuing to scan the next luggage item;
wherein the first direction and the second direction are opposite to each other;
the conveying speed of the luggage item in the step S10 is V1The conveying speed of the luggage item in the step S21 is V2，V1＞V2；
And is
The acquisition speed of the CT detection device in step S10 is T1The acquisition speed of the CT detection device in step S21 is T2，T2＞T1；
The conveying speed of the luggage item in the step S10 is V1The conveying speed of the luggage item in the step S01 is V3，V1＞V3；
And is
The acquisition speed of the CT detection device in step S10 is T1The acquisition speed of the CT detection device in step S01 is T3，T3＞T1。
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| CN110270510A (en) * | 2019-07-08 | 2019-09-24 | 浙江啄云智能科技有限公司 | A kind of logistics sorting safety check integral system and method |
| CN110270509A (en) * | 2019-07-08 | 2019-09-24 | 浙江啄云智能科技有限公司 | A kind of logistics sorting safety check integral system and method |
| CN110404813A (en) * | 2019-07-08 | 2019-11-05 | 浙江啄云智能科技有限公司 | A kind of multi-angle of view safe examination system and method |
| CN111337989A (en) * | 2020-03-20 | 2020-06-26 | 安徽启新明智科技有限公司 | Active double-visual-angle screening method and device for multistage security inspection instrument |
| CN118311070A (en) * | 2022-12-30 | 2024-07-09 | 同方威视技术股份有限公司 | Article security inspection system and method |
| CN120651881B (en) * | 2025-08-19 | 2025-10-17 | 上海英曼尼安全装备有限公司 | CT channel type security inspection machine and detection system thereof |
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| CN102359971A (en) * | 2011-09-14 | 2012-02-22 | 上海英迈吉东影图像设备有限公司 | Method for realizing single-source and multi-view security inspection, and system thereof |
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| US4020346A (en) * | 1973-03-21 | 1977-04-26 | Dennis Donald A | X-ray inspection device and method |
| US7197171B2 (en) * | 2003-02-19 | 2007-03-27 | Elgems Ltd. | Nuclear imaging |
| CN101770650B (en) * | 2009-01-07 | 2013-04-24 | 深圳迈瑞生物医疗电子股份有限公司 | Three-dimensional ultrasound real-time imaging method and device and imaging system |
| CN101943761B (en) * | 2010-09-12 | 2012-09-05 | 上海英迈吉东影图像设备有限公司 | Detection method of X-ray |
| CN102426394A (en) * | 2011-08-17 | 2012-04-25 | 公安部第一研究所 | CT security inspection instrument delivery system |
| CN103308538A (en) * | 2013-06-17 | 2013-09-18 | 开平市中铝实业有限公司 | Security check system for bus |
| CN103472074B (en) * | 2013-06-19 | 2016-01-20 | 清华大学 | Ct imaging system and method |
| CN108254397B (en) * | 2017-12-12 | 2021-03-05 | 北京航星机器制造有限公司 | Luggage article safety inspection device and inspection method thereof |
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| CN102359971A (en) * | 2011-09-14 | 2012-02-22 | 上海英迈吉东影图像设备有限公司 | Method for realizing single-source and multi-view security inspection, and system thereof |
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