CN108267463B - Security check scanning method, device and equipment - Google Patents
Security check scanning method, device and equipment Download PDFInfo
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- CN108267463B CN108267463B CN201611239985.9A CN201611239985A CN108267463B CN 108267463 B CN108267463 B CN 108267463B CN 201611239985 A CN201611239985 A CN 201611239985A CN 108267463 B CN108267463 B CN 108267463B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
- G01N23/10—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the material being confined in a container, e.g. in a luggage X-ray scanners
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2223/00—Investigating materials by wave or particle radiation
- G01N2223/03—Investigating materials by wave or particle radiation by transmission
Abstract
The invention provides a security inspection scanning method, a security inspection scanning device and security inspection scanning equipment, and relates to the field of security inspection. The security inspection scanning method comprises the following steps: acquiring line packet scanning data; judging whether a liquid container tray identification exists in the luggage scanning data; and if the liquid container tray identification exists, performing liquid detection operation. By the method, the liquid container tray identification in the luggage scanning data can be identified, the liquid detection mode can be switched in time, and the liquid borne on the tray in the detection area can be detected, so that the luggage and the liquid can be detected by adopting a single device, the configuration of a separate liquid detection device is not required, and the integration level of the device is improved; need not to detect liquid one by one alone, improved security check efficiency.
Description
Technical Field
The invention relates to the field of security inspection, in particular to a security inspection scanning method, a device and equipment.
Background
At present, more than 100 ml of liquid is prohibited to be carried in civil aviation safety inspection operation specifications. In the process of subway security inspection, the liquid carried by passengers also needs to be inspected separately.
In public places such as subways and airports, passengers often carry packages containing liquid to pass through a safety inspection port, at the moment, the passengers need to be reminded to take out a liquid container, and the passengers adopt a drinking mode or adopt a liquid instrument to carry out independent inspection. But the scanning space of the liquid instrument is limited, and the security inspection efficiency is reduced.
Disclosure of Invention
It is an object of the invention to improve the efficiency of security detection.
According to an aspect of the present invention, a security inspection scanning method is provided, including: acquiring line packet scanning data; judging whether a liquid container tray identification exists in the luggage scanning data; and if the liquid container tray identification exists, performing liquid detection operation.
Optionally, the method further comprises: judging whether a liquid container exists according to the line packet scanning data; and if the liquid container exists, sending out alarm information to prompt that the liquid container is put into the liquid container tray to execute liquid detection operation.
Optionally, performing the liquid detection operation comprises: acquiring detection data of the liquid to be detected by a dual-energy X-ray detector; and determining the effective atomic number and the characteristic density of the liquid to be detected according to the detection data of the liquid to be detected.
Optionally, the method further comprises: judging the danger level of the liquid to be detected; and sending out alarm information according to the danger level.
Optionally, the determining the risk level of the liquid to be measured includes: and determining the volume of the liquid container according to the detection data, and if the volume of the liquid container is larger than a preset threshold volume, judging the danger level of the liquid to be detected based on preset classification data according to the effective atomic number and the characteristic density of the liquid to be detected.
Optionally, sending the alarm information according to the risk level includes: and sending an alarm through sound, characters, graphs and/or color marks according to the danger level of the liquid to be detected, and indicating the danger level of the liquid to be detected.
Optionally, the determining the effective atomic number and the characteristic density of the liquid to be detected according to the detection data of the liquid to be detected includes: determining a base material decomposition coefficient of the liquid to be detected according to detection data of the liquid to be detected based on the predetermined base material information; and determining the effective atomic number and the characteristic density of the liquid to be detected according to the decomposition coefficient of the base material of the liquid to be detected.
Optionally, the method further comprises: judging whether the placement of the liquid container tray meets the requirements or not according to the liquid container tray identification in the luggage scanning data based on the preset identification position and/or the preset identification posture; if the placement of the liquid container tray meets the requirements, performing liquid detection operation; and if the placement of the liquid container tray does not meet the requirements, sending alarm information to prompt that the liquid container tray is placed again.
By the method, the liquid container tray identification in the luggage scanning data can be identified, and the liquid detection mode is timely switched to detect the liquid carried on the tray in the detection area, so that the luggage and the liquid detection can be realized by adopting a single device, the configuration of a separate liquid detection device is not required, and the integration level of the device is improved; need not to detect liquid one by one alone, improved security check efficiency.
According to another aspect of the present invention, there is provided a security inspection scanning apparatus, including: the luggage scanning module is used for acquiring luggage scanning data; the tray identification module is used for judging whether the liquid container tray identification exists in the luggage scanning data; and the liquid detection module is used for executing liquid detection operation when the tray identification recognition module determines that the liquid container tray identification exists.
Optionally, the method further comprises: the liquid container identification module is used for judging whether a liquid container exists according to the luggage scanning data; and the warning module is used for sending warning information to prompt that the liquid container is put into the liquid container tray to execute liquid detection operation when the liquid container identification module determines that the liquid container exists.
Optionally, the liquid detection module comprises: the detection data acquisition unit is used for acquiring detection data of the liquid to be detected through the dual-energy X-ray detector; and the liquid information determining unit is used for determining the effective atomic number and the characteristic density of the liquid to be detected according to the detection data of the liquid to be detected.
Optionally, the method further comprises: the danger level determining module is used for determining the danger level of the liquid to be detected; and the danger warning module is used for sending warning information according to the danger level.
Optionally, the risk level determination module comprises: the volume identification unit is used for acquiring the volume of the liquid container according to the detection data, comparing the volume of the liquid container with a preset threshold volume, and activating the danger level judgment unit if the volume of the liquid container is larger than the preset threshold volume; and the danger level judging unit is used for judging the danger level of the liquid to be detected based on the preset classification data according to the effective atomic number and the characteristic density of the liquid to be detected.
Optionally, the danger warning module is specifically configured to send a warning through sound, text, graphics, and/or color identification according to the danger level of the liquid to be measured, and indicate the danger level of the liquid to be measured.
Optionally, the liquid information determination module includes: the base material decomposition coefficient acquisition unit is used for determining the base material decomposition coefficient of the liquid to be detected according to the detection data of the liquid to be detected based on the preset base material information; and the liquid identification unit is used for determining the effective atomic number and the characteristic density of the liquid to be detected according to the decomposition coefficient of the base material of the liquid to be detected.
Optionally, the method further comprises: the tray placement verification module is used for judging whether the placement of the liquid container trays meets the requirements or not according to the liquid container tray identifications in the luggage scanning data based on the preset identification positions and/or the preset identification postures; if the placement of the liquid container tray meets the requirements, the liquid detection module executes liquid detection operation; and if the placement of the liquid container tray does not meet the requirement, activating an alarm module to send out alarm information to prompt that the liquid container tray is placed again.
The device can identify the liquid container tray identification in the luggage scanning data, and timely switches to the liquid detection mode to detect the liquid carried on the tray in the detection area, so that the luggage and the liquid detection can be realized by adopting a single device, the configuration of a separate liquid detection device is not required, and the integration level of the device is improved; need not to detect liquid one by one, improved the security check efficiency.
According to yet another aspect of the present invention, there is provided a security inspection apparatus comprising: a radiation source; a radiation detector; a transport mechanism; and any of the security scanning devices mentioned above.
The security inspection equipment can identify the liquid container tray identification in the luggage scanning data and switch to the liquid detection mode in time to detect the liquid borne on the tray in the detection area, so that the luggage and the liquid detection can be realized by adopting single equipment, the configuration of independent liquid detection equipment is not required, and the integration level of the equipment is improved; need not to detect liquid one by one, improved the security check efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flowchart of an embodiment of a security scanning method of the present invention.
Fig. 2 is a schematic view of one embodiment of a liquid container tray in the security scanning method of the present invention.
Fig. 3 is a flowchart of another embodiment of a security scanning method of the present invention.
Fig. 4 is a flowchart of a security scanning method according to another embodiment of the present invention.
Fig. 5 is a schematic view of an embodiment of a security inspection scanning device according to the present invention.
Fig. 6 is a schematic view of another embodiment of the security inspection scanning device of the present invention.
Fig. 7 is a schematic view of another embodiment of a security scanning apparatus according to the present invention.
Fig. 8 is a schematic view of a security scanner apparatus according to still another embodiment of the present invention.
Fig. 9 is a schematic view of one embodiment of the security device of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
A flow chart of one embodiment of the security scan method of the present invention is shown in fig. 1.
In step 101, line pack scan data of a detection region is acquired. The object to be detected passes through the detection area under the drive of the conveying mechanism, wherein the liquid container is placed on the liquid container tray, and the liquid container tray passes through the detection area under the drive of the conveying mechanism.
In step 102, it is determined whether a liquid container tray identification is present in the row packet scan data. If the liquid container tray identification is identified in the row packet scanning data, confirming that the liquid container tray enters a detection area, and executing step 103; otherwise, the liquid container detection is not needed, the step 101 is executed again, and the packet detection is continued.
In step 103, the liquid detection mode is switched to, and the liquid detection operation is performed.
In the prior art, a CT (Computed Tomography) device can detect liquid in the process of scanning a luggage, and can depict the material property of the liquid without taking out a liquid bottle, thereby performing danger level judgment. However, the current CT instrument is expensive, occupies a large area, has a low luggage passing rate and reduces the security inspection efficiency.
By the method in the embodiment of the invention, the liquid container tray identification in the luggage scanning data can be identified, and the liquid detection mode is switched to in time to detect the liquid carried on the tray in the detection area, so that the luggage and the liquid detection can be realized by adopting a single device, the configuration of a separate liquid detection device is not required, and the integration level of the device is improved; need not to detect liquid one by one alone, improved security check efficiency.
A schematic diagram of one embodiment of a liquid container tray in the security scanning method of the present invention is shown in fig. 2. Wherein, 1 is liquid container tray sign, and the security installations can judge that liquid container tray gets into the detection zone through discernment liquid container tray sign 1 to liquid detection begins. In one embodiment, the liquid container tray mark may be a metal mark, such as a metal strip with a high atomic number, and each strip may have a positioning structure, such as a plurality of hollow parts (i.e., positioning holes), each hollow part has a different size, and the distance between the hollow parts may also be different. In the tray recognition, the marker is divided by the atomic number to extract the region of the marker. After the metal marker area is extracted, the positioning holes on the marker are identified, whether the scanned luggage is the tray or not is determined according to the slope difference degree of the boundaries of the two sides of the marker and the number of the positioning holes, and whether the placement of the tray is satisfactory or not is judged by solving the positions of the positioning holes, the distance between the positioning holes and the slope of the center of the positioning hole on one side (or the center line of the marker on one side). If the preset requirements are not met, sending an alarm information request to put again, and detecting again. By the method, the relative angle between the ray direction and the liquid container can be optimized, and the liquid detection accuracy is improved.
In one embodiment, as shown in fig. 2, a tray mark 1 may be also provided at the other end of the liquid container tray, and the security inspection apparatus can determine that the tray has completely entered the detection area by recognizing the tray mark, and when the tray mark leaves the detection area, the liquid detection is finished, thereby facilitating the security inspection apparatus to switch between the two modes of liquid detection and luggage detection. The luggage detection state can be set to be a resident state of the security inspection equipment, and when the liquid container tray is determined to enter a detection area, the liquid container tray is switched to be in a liquid detection state; when it is determined that the liquid container tray is out of the detection zone, the detection state of the traveling bag is switched back. In one embodiment, the liquid container tray marks on the two sides of the liquid container tray can be made of metals with different atomic numbers, so that the two ends of the liquid container tray can be distinguished in the measuring process.
By the method, the tray can be found to leave the detection area in time, so that the detection mode is switched to the packet detection mode in time, and the detection efficiency is further improved.
In one embodiment, as shown in FIG. 2, the liquid container tray 2 is a base surface, 3 is a bottom of the tray, 4 is a slot, and the liquid container is placed in the slot 4 with the bottom of the liquid container facing the base surface 2 of the tray and the top facing the opposite direction of the base surface 2. In one embodiment, a single liquid container tray comprises a plurality of clamping grooves 4, so that continuous detection of a plurality of liquid containers can be realized, and the liquid detection efficiency is improved.
In one embodiment, as shown in fig. 2, each of the slots 4 includes a plurality of linear stems 5, 51 is a lower portion of the linear stem, and 52 is an upper portion of the linear stem, and the fixing of the linear stems can ensure the stability of the position of the liquid container relative to the liquid container tray, thereby further improving the detection accuracy.
A flow chart of another embodiment of the security scan method of the present invention is shown in fig. 3.
In step 301, line pack scan data of the detection region is acquired. The object to be detected passes through the detection area under the drive of the conveying mechanism, wherein the liquid container is placed on the liquid container tray, and the liquid container tray passes through the detection area under the drive of the conveying mechanism.
In step 302, it is determined whether a liquid container tray identification is present in the row packet scan data. If the liquid container tray identification is identified in the luggage scanning data, confirming that the liquid container tray enters a detection area, and executing step 303; otherwise, the liquid container detection is deemed unnecessary and the process returns to step 304.
In step 303, a liquid detection operation is performed.
In step 304, it is determined whether a liquid container is present in the packet based on the row packet scan data. If a liquid container is present, step 305 is performed. If no liquid container exists, the process returns to step 301 to continue the packet inspection. In one embodiment, an edge image may be acquired from a scanned image; and determining a bottle area to be selected by counting edge points which are symmetrical about a symmetry axis of the scanning window in the scanning window according to the edge image and based on the symmetry of the bottle, thereby screening the bottle area from the bottle area to be selected.
In step 305, an alarm message is issued to prompt the operator to remove the liquid container from the bag and place it in the liquid container tray to perform the liquid testing operation. In one embodiment, the location and number of liquid containers may be indicated by way of image marking of the bottle area. Then execution continues with step 301.
By the method, the liquid container hidden in the bag can be found in time, so that the liquid in the bag is prevented from being checked, the security check tightness is improved, and the security check effect is improved.
In one embodiment, the detection data of the liquid to be detected can be acquired by a dual-energy X-ray detector; determining a base material decomposition coefficient of the liquid to be detected according to detection data of the liquid to be detected based on predetermined base material information, wherein the predetermined base material information comprises correlation information of the detection data and the decomposition amount, and the base material decomposition coefficient of the liquid to be detected can be obtained by calculating in cooperation with the fact that rays penetrate through the thickness of the liquid; and determining the effective atomic number and the characteristic density of the liquid to be detected according to the decomposition coefficient of the base material of the liquid to be detected. In one embodiment, the predetermined basis material information includes a correspondence of dual-energy detection data to a decomposition amount. In one embodiment, a base material coefficient table may be established in advance, and predetermined base material information is stored in the base material coefficient table. Because the effective atomic number and the characteristic density are two important indexes of the liquid material, the method can effectively classify the liquid and carry out the risk grade identification, thereby achieving the purpose of liquid safety detection.
In one embodiment, the predetermined base material information may be generated and stored in advance to facilitate matching calls. In one embodiment, a table of base material coefficients may be built by interpolation, scanning a combination of base material thicknesses. Because the required thickness combinations are excessive and the whole data space is difficult to be covered completely, the high-energy and low-energy spectrums of the dual-energy X-ray system can be estimated by means of an energy spectrum calibration piece, and then a proper base material is selected based on the energy spectrums to virtually construct a base material coefficient table. In one embodiment, the spectral target may be composed of two or more substances, typically common, easily processable substances are used, such as polymethylmethacrylate, PMMA, and aluminum Al, carbon C and Al, or PMMA, Al, and iron Fe. In one embodiment, the energy spectrum estimation may employ a maximum likelihood estimation method; in selecting the base material, two or more different substances may be used as the base material, and the substance may be a single substance or a mixture thereof. Two common base materials may be C and Al, C and Fe, boron B and Al, B and Fe, polyethylene PE and Al, PMMA and Al, etc.
By the method, a relatively perfect preset base material information table can be established, so that query can be carried out based on the data table in the detection process, liquid detection can be conveniently and rapidly realized, and the liquid detection efficiency is improved.
In one embodiment, an objective function may be set, and an objective function optimization algorithm may be used to determine the decomposition coefficients of the base material of the liquid to be measured based on the decomposition amount and the liquid container size information. For example, the objective function is set as:
wherein, Bi,1A first component obtained from the detection data of the ray i; b isi,2A second component obtained from the detection data of the ray i; dtray,iLiquid container support for ray i to pass throughThickness of the disk, btray,1For a predetermined first base material decomposition coefficient of the liquid container tray, btray,2A predetermined second base material decomposition coefficient for the liquid container tray; dcontainer,iThickness of the container traversed by ray i, dliquid,iThickness of liquid traversed by ray i, bcontainer,1Is the first base material decomposition coefficient of the container, bcontainer,2A second basis material decomposition coefficient of the container, i is a ray identification, i is a natural number, i is more than or equal to 1 and less than or equal to N, and N is the total number of LORs (Line of responses) penetrating through the liquid; obtaining the decomposition coefficient b of the first base material when the objective function f is minimumliquid,1And a second base material decomposition coefficient bliquid,2Thereby realizing the determination of the decomposition coefficient of the base material of the liquid to be measured.
By the method, the size information of the liquid container, the first decomposition amount and the first decomposition amount can be obtained according to the detection data, and the decomposition coefficient of the base material of the liquid to be detected is determined according to the first decomposition amount, the first decomposition amount and the size information of the liquid container, so that the detection and identification of the liquid to be detected by using the dual-energy X-ray are realized, and the liquid detection efficiency is improved.
In one embodiment, empty liquid container trays may be pre-scanned, and tray-related information acquired and stored. The tray related information includes tray geometric information and tray material information. The tray geometry information includes the position, size, and geometric parameters related to container information extraction of each card slot in both directions of the scanned image. And during solving, solving by combining the prior information set during tray design. Solving tray material information: the method is used for eliminating the influence of the tray on the result when calculating the liquid material information. The scanning of empty tray can more accurately dig the material of the tray bottom surface in liquid region, and the material information of tray actually shows the basis material decomposition coefficient of the tray bottom surface of unit thickness. When two base materials are used, the base material decomposition coefficients of the tray include a predetermined first base material decomposition coefficient and a predetermined second base material decomposition coefficient.
By the method, the geometric and material information of the tray can be accurately obtained, the influence of the tray on detection data is fully considered under the condition that the liquid container is placed on the liquid container tray, the stability of the liquid to be detected is maintained, meanwhile, the accuracy of operation is ensured, and the accuracy of liquid detection is further improved.
In one embodiment, to obtain the parameter dliquid,iGeometric information of the liquid needs to be acquired. The geometrical information of most liquids can be derived directly from the geometrical information of the container, e.g. if the container geometry is circular, the radius of the liquid is the radius of the container minus the wall thickness of the container. For extraction of liquid level, in one embodiment, the liquid level height may be extracted from the perspective image data. For example, when a double-view detection mode is adopted, if the bottle bodies of the containers placed in the tray are parallel to the conveying direction of the belt, the liquid level can be directly extracted from side-view angle image data; if the bottle body of the container is perpendicular to the conveying direction of the belt, the arc-shaped boundary of the liquid level can be extracted from the image data of the bottom view angle, and the height of the liquid level is determined by combining the geometric shape of the container. In another embodiment, the liquid level height may be obtained in the optimization solution by using the liquid level height as a parameter to be solved in the solution process of the objective function.
By the method, the geometrical information of the liquid can be acquired, so that the known parameters in the objective function are increased, and the reliability of liquid detection is improved.
In one embodiment, after the first base material decomposition coefficient and the second base material decomposition coefficient are obtained, the characteristic density of the liquid to be measured may be determined according to the first base material decomposition coefficient, the second base material decomposition coefficient, the first predetermined characteristic density and the second predetermined characteristic density, for example, according to the formula:
determining the characteristic density rho of the liquid to be measuredliquid *Wherein b isliquid,1Is a first base material decomposition coefficient, bliquid,2Is the second basis material decomposition coefficient, p1 *Is a first predetermined feature density, p2 *Is a second predetermined feature density. By the method, the characteristic density of the liquid to be measured can be obtained according to the first base material decomposition coefficient and the second base material decomposition coefficient. The characteristic density is an important index of liquid identification, so that the liquid identification and the risk degree judgment can be facilitated, and the safety detection of the liquid is realized.
In one embodiment, after the first and second decomposition coefficients of the base material are obtained, the effective atomic number of the liquid to be measured may be determined according to the first and second decomposition coefficients of the base material, the first and second predetermined characteristic densities, the first and second predetermined effective atomic numbers, for example, according to the formula:
determining the effective atomic number Zeff of the liquid to be measuredliquidWherein, Zeff1Is a first predetermined effective atomic number, Zeff2Is a second predetermined effective atomic number, and n is a predetermined constant. In one embodiment, n may be determined empirically or corrected for detection effects. In one embodiment, n may take the value 3.5. Because the effective atomic number is an important index of liquid identification, the method can be helpful for liquid identification and risk degree judgment, and realizes the safety detection of the liquid.
In one embodiment, after determining the effective atomic number and the feature density of the liquid under test, the hazard level of the liquid under test may be determined based on predetermined classification data. In one embodiment, the predetermined classification data may include a correspondence of effective atomic number and feature density to risk level. In one embodiment, a predetermined classifier may be used to determine the risk level of the liquid to be tested and issue an alarm message based on the risk level. By the method, the effective atomic number and characteristic density information can be converted into specific danger level information and transmitted to the staff, so that the staff can conveniently make corresponding reactions, and the security inspection effect is optimized.
In one embodiment, a variety of design methods may be employed for the design of the classifier. For example:
(1) the nearest neighbor method. And for each liquid material data to be classified, observing the state of the data in the liquid material database in a certain neighborhood, and determining the belonging danger level according to the dangerousness of the neighborhood.
(2) Two-dimensional area division method. The liquid material (atomic number and feature density) data can be represented by a two-dimensional coordinate system. Firstly, a two-dimensional coordinate system is normalized, and then a decision strategy based on the minimum error rate or the minimum risk is adopted to divide a two-dimensional area into a plurality of areas, wherein each area has respective risk level.
(3) SVM (Support Vector Machine). And (4) taking [ liquid atomic number, liquid characteristic density and liquid danger level ] as input to train a classifier, comparing classification effects of various kernel functions, and selecting a proper kernel function.
The liquid material database is established by the method, and is continuously updated and enriched, so that the liquid contraband detection capability is enhanced. After the liquid material database data is added, the sample training is carried out again to obtain a better classifier. When the liquid material database is established, a dimension can be set for each added data to represent the risk of the added data, for example, for concentrated sulfuric acid, the risk level is set to be 1, and therefore liquid risk degree information of visual identification can be conveniently obtained.
Because the liquid with the volume smaller than the threshold value can be free from danger detection according to the safety inspection rules of some industries, the volume of the liquid can be estimated according to the geometric information of the liquid, and if the volume of the liquid is smaller than the threshold value, the danger grade classification is not carried out, so that the safety inspection rules of the industries are met on one hand, and the false alarm of the small-volume liquid is avoided; on the other hand, the operation amount of the equipment is reduced, and the security inspection efficiency is improved.
In one embodiment, different modes can be used for alarming aiming at different danger levels, for example, for the high danger level, emergency alarm and picture frame prompt can be adopted; for suspicious articles, ordinary alarm and picture frame prompt can be adopted; for low danger level, only using frame prompt or not. In the aspect of picture frame prompting, the danger level can be marked by different colors, or characters for indicating the danger level can be added.
By the method, the danger degree of the liquid to be detected can be more intuitively transmitted to the user, so that the working personnel can find dangerous articles in time and perform corresponding operation conveniently.
A flow chart of yet another embodiment of the security scanning method of the present invention is shown in fig. 4.
In step 401, line pack scan data of the detection region is acquired. The object to be detected passes through the detection area under the drive of the conveying mechanism, wherein the liquid container is placed on the liquid container tray, and the liquid container tray passes through the detection area under the drive of the conveying mechanism.
In step 402, it is determined whether a liquid container tray identification is present in the row packet scan data. If the liquid container tray identification is identified in the luggage scanning data, confirming that the liquid container tray enters a detection area, and executing step 405; otherwise, it is determined that the liquid container detection is not required, and the process returns to step 403.
In step 403, it is determined whether a liquid container is present in the packet based on the line packet scan data. If a liquid container is present, step 404 is performed. If no liquid container exists, the process returns to step 401 to continue to perform the packet detection. In one embodiment, an edge image may be acquired from a scanned image; and determining a bottle area to be selected by counting edge points which are symmetrical about a symmetry axis of the scanning window in the scanning window according to the edge image and based on the symmetry of the bottle, thereby screening the bottle area from the bottle area to be selected.
In step 404, an alarm message is issued to prompt the staff to take out the liquid container from the bag and put it into the liquid container tray to perform the liquid detection operation, followed by performing step 401. In one embodiment, the location and number of liquid containers may be indicated by way of image marking of the bottle area.
In step 405, it is determined whether the placement of the liquid container trays meets the requirements. If yes, go to step 407; if not, go to step 406. In one embodiment, the liquid container tray can be judged whether the placement of the liquid container tray meets the requirements according to the preset mark position and the preset mark posture. In one embodiment, the tray placement can be determined by solving the position of the alignment holes on the liquid container tray, the distance between the alignment holes, and the slope of the center of the alignment hole on one side (or the centerline of the marker on one side).
In step 406, an alarm message is issued to alert the operator to replace the liquid container tray.
In step 407, a liquid detection operation is performed. In one embodiment, the liquid detection operation may be performed in any of the ways mentioned above.
In step 408, a hazard level for the liquid under test is determined. In one embodiment, the liquid risk level determination may be performed by using the above-mentioned predetermined classifier according to the effective atomic number and the characteristic density of the liquid to be measured.
In step 409, corresponding warning information is sent according to the danger level. In one embodiment, the alarm can be given in different ways according to different danger levels, so that the danger degree of the liquid to be measured can be more intuitively transmitted to a user.
By the method, the liquid container tray identification in the luggage scanning data can be identified, the liquid detection mode can be switched in time, and the luggage and liquid detection can be realized by adopting a single device; the liquid container hidden in the bag can be detected and the worker can be prompted to take out the liquid container, so that the liquid is prevented from being detected, and the reliability of security inspection is improved; the relative angle between the ray direction and the liquid container is optimized by checking the placement of the tray, so that the liquid detection accuracy is improved; the liquid material information is acquired by analyzing the dual-energy X detection data, so that the detection efficiency is improved; the danger level of the liquid to be detected can be displayed by adopting different forms of alarm information, and the reliability of security inspection is further improved.
A schematic diagram of one embodiment of the security scanner apparatus of the present invention is shown in fig. 5. The pakcet scanning module 501 can obtain pakcet scanning data of the detection area. The object to be detected passes through the detection area under the drive of the conveying mechanism, wherein the liquid container is placed on the liquid container tray, and the liquid container tray passes through the detection area under the drive of the conveying mechanism. The tray identification module 502 is capable of determining whether a liquid container tray identification exists in the line packet scan data. If the liquid container tray identification is identified in the line packet scan data, activating the liquid detection module 503 to perform a liquid detection operation; if the liquid container tray identifier is not identified in the packet scanning data, the packet scanning module 501 continues to perform packet detection.
The device can identify the liquid container tray identification in the luggage scanning data, and timely switches to the liquid detection mode to detect the liquid carried on the tray in the detection area, so that the luggage and the liquid detection can be realized by adopting a single device, the configuration of a separate liquid detection device is not required, and the integration level of the device is improved; need not to detect liquid one by one alone, improved security check efficiency.
In one embodiment, two ends of the liquid container tray respectively comprise liquid container tray marks, and when the detector detects the liquid container tray mark at one end, the liquid container tray is determined to enter a detection area, and liquid detection operation is executed; when the liquid container tray marks at the other end enter the detection area, the liquid container tray is determined to completely enter the detection area, and after liquid detection of the area between the liquid container tray marks at the two ends is finished, liquid detection is finished, and a return package detection mode is switched in time. The device can timely find and complete liquid detection, so that the liquid detection is timely switched to a bag detection mode, and the detection efficiency is further improved.
A schematic view of another embodiment of the security scanner apparatus of the present invention is shown in fig. 6. Wherein the structure and function of the luggage scanning module 601, the tray identification module 602 and the liquid detection module 603 are similar to those of the embodiment of fig. 5. The security inspection scanning device further comprises a liquid container identification module 604 and an alarm module 605, wherein the liquid container identification module 604 can judge whether a liquid container exists in the packet according to the packet scanning data. If a liquid container is present, the alarm module 605 is activated to issue an alarm message to prompt the operator to remove the liquid container from the bag and place it in a liquid container tray to perform a liquid detection operation. In one embodiment, the alert module 605 may indicate the location and number of liquid containers by way of image marking the bottle area. If the liquid container does not exist in the packet scanning data, the packet scanning module 501 continues to perform packet detection.
The device can find the liquid container hidden in the bag in time, thereby preventing the liquid in the bag from being checked, improving the security check tightness and improving the security check effect.
In one embodiment, the liquid detection module 603 may obtain detection data of the liquid to be detected through a dual-energy X-ray detector; determining a base material decomposition coefficient of the liquid to be detected according to detection data of the liquid to be detected based on predetermined base material information, wherein the predetermined base material information comprises correlation information of the detection data and the decomposition amount, and the base material decomposition coefficient of the liquid to be detected can be obtained by calculating in cooperation with the fact that rays penetrate through the thickness of the liquid; and determining the effective atomic number and the characteristic density of the liquid to be detected according to the decomposition coefficient of the base material of the liquid to be detected. Because effective atomic number and characteristic density are two important indexes of liquid material, the device can effectively classify the liquid and carry out danger level identification, thereby achieving the purpose of liquid safety detection.
In one embodiment, an objective function may be set, and the liquid detection module 603 may determine the decomposition coefficient of the base material of the liquid to be detected according to the decomposition amount and the liquid container size information using an objective function optimization algorithm. The objective function may be as shown in equation (1) mentioned above.
The device can obtain the size information of the liquid container, the first decomposition amount and the first decomposition amount according to the detection data, and determines the decomposition coefficient of the base material of the liquid to be detected according to the first decomposition amount, the first decomposition amount and the size information of the liquid container, so that the detection and the identification of the liquid to be detected by using the dual-energy X-ray are realized, and the liquid detection efficiency is improved.
At one endIn one embodiment, to obtain the parameter dliquid,iThe liquid detection module 603 needs to acquire geometrical information of the liquid. The geometrical information of most liquids can be derived directly from the geometrical information of the container, e.g. if the container geometry is circular, the radius of the liquid is the radius of the container minus the wall thickness of the container. For extraction of liquid level, in one embodiment, the liquid level height may be extracted from the perspective image data. For example, when a double-view detection mode is adopted, if the bottle bodies of the containers placed in the tray are parallel to the conveying direction of the belt, the liquid level can be directly extracted from side-view angle image data; if the bottle body of the container is perpendicular to the conveying direction of the belt, the arc-shaped boundary of the liquid level can be extracted from the image data of the bottom view angle, and the height of the liquid level is determined by combining the geometric shape of the container. In another embodiment, the liquid level height may be obtained in the optimization solution by using the liquid level height as a parameter to be solved in the solution process of the objective function.
The device can acquire the geometric information of the liquid, thereby increasing the known parameters in the objective function and improving the reliability of liquid detection.
In one embodiment, because the liquid with the volume smaller than the threshold value can be free from danger detection according to the security inspection rules of some industries, the liquid detection module 603 can calculate the volume of the liquid according to the geometric information of the liquid, and if the volume of the liquid is smaller than the threshold value, the decomposition coefficient of the liquid does not need to be determined, and the effective atomic number and the feature density of the liquid do not need to be calculated, so that the calculation amount of equipment is further reduced, and the security inspection efficiency is improved.
In one embodiment, after the first and second decomposition coefficients of the base material are obtained, the above-mentioned formulas (2) and (3) can be used to calculate the characteristic density and the effective atomic number of the liquid to be detected, so that the liquid risk level can be conveniently determined according to the two parameters, and the purpose of liquid detection is achieved.
A schematic view of yet another embodiment of the security scanner apparatus of the present invention is shown in fig. 7. The structure and function of the luggage scanning module 701, the tray identification module 702 and the liquid detection module 703 are similar to those of the embodiment of fig. 6. The security scanning apparatus further includes a hazard level determination module 704 and a hazard alarm 705. Wherein the risk level determination module 704 determines the risk level of the liquid to be measured using a predetermined classifier; the hazard alarm 705 can issue alarm information based on the hazard level.
Such device can change effective atomic number and characteristic density information into specific danger level information and convey for the staff, and the staff of being convenient for makes corresponding reaction, has optimized the security check effect.
Because the liquid with the volume smaller than the threshold value can be free from danger detection according to the safety inspection rules of some industries, the danger level determination module 704 can estimate the volume of the liquid according to the geometric information of the liquid acquired by the liquid detection module 703, and if the volume of the liquid is smaller than the threshold value, the danger level classification is not performed, so that the safety inspection rules of the industries are met on the one hand, and the false alarm of the small-volume liquid is avoided; on the other hand, the operation amount of the equipment is reduced, and the security inspection efficiency is improved.
In one embodiment, the hazard alarm 705 may alarm in different ways for different hazard levels, for example, for a high hazard level, emergency alarm + frame prompt may be used; for suspicious articles, ordinary alarm and picture frame prompt can be adopted; for low danger level, only using frame prompt or not. In the aspect of picture frame prompting, the danger level can be marked by different colors, or characters for indicating the danger level can be added. Such device can be more audio-visual conveys the danger degree of the liquid that awaits measuring to the user to be convenient for the staff in time discovers dangerous goods and makes corresponding operation.
A schematic diagram of yet another embodiment of the security scanner apparatus of the present invention is shown in fig. 8. The structures and functions of the luggage scanning module 801, the tray identification module 802, the liquid detection module 803, the liquid container identification module 804, the alarm module 805, the danger level determination module 807 and the danger alarm 808 are similar to those in the embodiments of fig. 6 and 7. The security inspection scanning device further includes a tray placement verification module 806 in signal connection with the tray identification recognition module 802, the liquid detection module 803 and the alarm module 805, and can determine whether the placement of the liquid container tray meets the requirement according to the liquid container tray identification obtained by the tray identification recognition module 802, and in one embodiment, can determine whether the placement of the liquid container tray meets the requirement according to the predetermined identification position and the predetermined identification posture. In one embodiment, the tray placement can be determined by solving the position of the alignment holes on the liquid container tray, the distance between the alignment holes, and the slope of the center of the alignment hole on one side (or the centerline of the marker on one side). If the placement meets the requirements, activating the liquid detection module 803 to execute liquid detection; if the placement is not satisfactory, the alarm module 805 is activated to send an alarm message to remind the staff to place the liquid container tray again.
The device can identify the liquid container tray identification in the luggage scanning data, and timely switches to the liquid detection mode, so that the luggage and liquid detection is realized by adopting a single device; the liquid container hidden in the bag can be detected and the worker can be prompted to take out the liquid container, so that the liquid is prevented from being detected, and the reliability of security inspection is improved; the relative angle between the ray direction and the liquid container is optimized by checking the placement of the tray, so that the liquid detection accuracy is improved; the liquid material information is acquired by analyzing the dual-energy X detection data, so that the detection efficiency is improved; the danger level of the liquid to be detected can be displayed by adopting different forms of alarm information, and the reliability of security inspection is further improved.
A schematic diagram of one embodiment of the security device of the present invention is shown in fig. 9. Wherein 11 is a conveying mechanism, and in fig. 9, the conveying mechanism 11 moves along the direction vertical to the paper surface; the radiation source 12 is a radiation source and can emit X rays to the direction of the object to be measured, and the radiation source is an X ray emitter. The detector 13 is a detector capable of detecting rays, and the detector 13 is a dual-energy X-ray detector. The security inspection equipment further comprises any one of the security inspection scanning devices mentioned above. And when the liquid container tray identification exists in the row packet scanning data, switching to a liquid detection mode and executing liquid detection operation. In one embodiment, the security device switches back to the travel pack detection mode when the liquid container tray leaves the detection zone or after detection of a liquid container in the tray is complete.
The security inspection equipment can identify the liquid container tray identification in the luggage scanning data and switch to the liquid detection mode in time to detect the liquid borne on the tray in the detection area, so that the luggage and the liquid detection can be realized by adopting single equipment, the configuration of independent liquid detection equipment is not required, and the integration level of the equipment is improved; need not to detect liquid one by one, improved the security check efficiency. In addition, the equipment can be improved and upgraded on the basis of the existing security inspection equipment, so that the implementation cost is reduced, and the equipment is convenient to popularize and use.
In one embodiment, when the device is in the row-bag detection mode, it can be determined whether a liquid container is present in the bag, and if a liquid container is found to be present in the bag, an alarm message is issued to prompt a worker to take the liquid container out of the bag and place the liquid container into a liquid container tray to perform a liquid detection operation.
The security inspection equipment can find the liquid container hidden in the bag in time, so that the liquid in the bag is prevented from being overlooked, the security inspection tightness is improved, and the security inspection effect is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (15)
1. A security inspection scanning method, comprising:
acquiring line packet scanning data;
judging whether a liquid container tray mark exists in the luggage scanning data or not, wherein two ends of the liquid container tray respectively comprise the liquid container tray mark;
if the liquid container tray identification exists, performing a liquid detection operation, including: when the detector detects the liquid container tray mark at one end, executing liquid detection operation; when the liquid container tray marks at the other end enter the detection area, liquid detection of the area between the liquid container tray marks at the two ends is completed; otherwise, continuing to perform the line packet detection and executing to acquire line packet scanning data;
further comprising: and after the liquid detection of the area between the liquid container tray marks at the two ends is finished, switching back to the traveling bag detection mode.
2. The method of claim 1, further comprising:
judging whether a liquid container exists according to the luggage scanning data;
and if the liquid container exists, sending out alarm information to prompt that the liquid container is put into the liquid container tray to execute liquid detection operation.
3. The method of claim 1 or 2, wherein the performing a liquid detection operation comprises:
acquiring detection data of the liquid to be detected by a dual-energy X-ray detector;
and determining the effective atomic number and the characteristic density of the liquid to be detected according to the detection data of the liquid to be detected.
4. The method of claim 3, further comprising:
determining the danger level of the liquid to be detected;
and sending out alarm information according to the danger level.
5. The method of claim 4, wherein said determining the risk level of the liquid to be tested comprises:
determining a volume of the liquid container based on the detection data, and if the volume of the liquid container is greater than a predetermined threshold volume,
judging the danger level of the liquid to be detected based on preset classification data according to the effective atomic number and the characteristic density of the liquid to be detected;
and/or the presence of a gas in the gas,
the sending of the alarm information according to the danger level includes: and sending an alarm through sound, characters, graphs and/or color marks according to the danger level of the liquid to be detected, and indicating the danger level of the liquid to be detected.
6. The method of claim 3, wherein determining the effective atomic number and the characteristic density of the liquid under test from the detection data of the liquid under test comprises:
determining a base material decomposition coefficient of the liquid to be detected according to detection data of the liquid to be detected based on predetermined base material information;
and determining the effective atomic number and the characteristic density of the liquid to be detected according to the decomposition coefficient of the base material of the liquid to be detected.
7. The method of claim 1 or 2, further comprising:
based on a preset identification position and/or a preset identification posture, judging whether the placement of the liquid container tray meets the requirements or not according to the liquid container tray identification in the luggage scanning data;
if the placement of the liquid container tray meets the requirements, the liquid detection operation is executed;
and if the placement of the liquid container tray does not meet the requirements, sending alarm information to prompt that the liquid container tray is placed again.
8. A security inspection scanning device, comprising:
the luggage scanning module is used for acquiring luggage scanning data;
the tray identification module is used for judging whether the liquid container tray identification exists in the luggage scanning data; the two ends of the liquid container tray respectively comprise liquid container tray marks, and if the liquid container tray marks do not exist, the luggage scanning module continues to perform luggage detection;
the liquid detection module is used for executing liquid detection operation when the tray identification recognition module determines that the liquid container tray identification exists, and comprises: when the detector detects the liquid container tray mark at one end, executing liquid detection operation; when the liquid container tray marks at the other end enter the detection area, liquid detection of the area between the liquid container tray marks at the two ends is completed; and after the liquid detection of the area between the liquid container tray marks at the two ends is finished, switching back to the traveling bag detection mode.
9. The apparatus of claim 8, further comprising:
the liquid container identification module is used for judging whether a liquid container exists according to the luggage scanning data;
and the warning module is used for sending warning information to prompt that the liquid container is put into the liquid container tray to execute liquid detection operation when the liquid container identification module determines that the liquid container exists.
10. The apparatus of claim 8 or 9, wherein the liquid detection module comprises:
the detection data acquisition unit is used for acquiring detection data of the liquid to be detected through the dual-energy X-ray detector;
and the liquid information determining unit is used for determining the effective atomic number and the characteristic density of the liquid to be detected according to the detection data of the liquid to be detected.
11. The apparatus of claim 10, further comprising:
the danger level determining module is used for determining the danger level of the liquid to be detected;
and the danger warning module is used for sending warning information according to the danger level.
12. The apparatus of claim 11, wherein the hazard level determination module comprises:
the volume identification unit is used for acquiring the volume of the liquid container according to the detection data, comparing the volume of the liquid container with a preset threshold volume, and activating the danger level judgment unit if the volume of the liquid container is larger than the preset threshold volume;
the danger level judging unit is used for judging the danger level of the liquid to be detected based on preset classification data according to the effective atomic number and the characteristic density of the liquid to be detected;
and/or the presence of a gas in the gas,
the danger warning module is specifically used for sending out a warning through sound, characters, graphs and/or color marks according to the danger level of the liquid to be detected and indicating the danger level of the liquid to be detected.
13. The apparatus according to claim 10, wherein the liquid information determination unit includes:
the base material decomposition coefficient acquisition unit is used for determining the base material decomposition coefficient of the liquid to be detected according to the detection data of the liquid to be detected based on preset base material information;
and the liquid identification unit is used for determining the effective atomic number and the characteristic density of the liquid to be detected according to the decomposition coefficient of the base material of the liquid to be detected.
14. The apparatus of claim 8 or 9, further comprising:
the tray placement verification module is used for judging whether the placement of the liquid container trays meets the requirements or not according to the liquid container tray identifications in the luggage scanning data based on the preset identification positions and/or the preset identification postures;
if the placement of the liquid container tray meets the requirements, the liquid detection module executes the liquid detection operation;
and if the placement of the liquid container tray does not meet the requirement, activating the alarm module to send out alarm information to prompt that the liquid container tray is placed again.
15. A security inspection apparatus, comprising:
a radiation source;
a radiation detector;
a transport mechanism; and the combination of (a) and (b),
a security scanner apparatus as claimed in any one of claims 8 to 14.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201611239985.9A CN108267463B (en) | 2016-12-29 | 2016-12-29 | Security check scanning method, device and equipment |
| PCT/CN2017/118525 WO2018121504A1 (en) | 2016-12-29 | 2017-12-26 | Security scanning method, apparatus, and system |
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| CN201611239985.9A CN108267463B (en) | 2016-12-29 | 2016-12-29 | Security check scanning method, device and equipment |
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| CN109254328A (en) * | 2018-02-24 | 2019-01-22 | 北京首都机场航空安保有限公司 | A kind of luggage security check system |
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| US7317390B2 (en) * | 2003-06-11 | 2008-01-08 | Quantum Magnetics, Inc. | Screening checkpoint for passengers and baggage |
| US7290287B2 (en) * | 2003-11-20 | 2007-10-30 | International Business Machines Corporation | Security screening of electronic devices by device identifier |
| DE202007019256U1 (en) * | 2006-09-18 | 2012-01-31 | Optosecurity Inc. | Device for assessing the properties of liquids |
| CN101303317B (en) * | 2008-03-05 | 2010-11-17 | 中国科学院合肥物质科学研究院 | Explosive substance testing system apparatus and testing method thereof |
| DE102012201406A1 (en) * | 2012-02-01 | 2013-08-01 | Smiths Heimann Gmbh | X-ray inspection system for the detection of certain materials in a test object |
| CN104165896B (en) * | 2014-08-18 | 2017-03-22 | 公安部第一研究所 | Liquid goods safety inspection method and device |
| CN204028022U (en) * | 2014-08-18 | 2014-12-17 | 公安部第一研究所 | A kind of channel-type Double-visual angle X ray liquid article safety inspection device |
| CN104181178B (en) * | 2014-08-18 | 2016-08-17 | 公安部第一研究所 | A kind of channel-type Double-visual angle X-ray liquid article safety check system |
| CN204287075U (en) * | 2014-12-29 | 2015-04-22 | 同方威视技术股份有限公司 | Integrated safe check system |
| CN105067644A (en) * | 2015-07-30 | 2015-11-18 | 安徽中杰信息科技有限公司 | Method for identifying liquid hazardous article through X-ray inspection system |
| CN105807329B (en) * | 2016-05-30 | 2019-05-17 | 公安部第一研究所 | It is a kind of for identification package in dangerous liquid x-ray detection device and method |
| CN105911604B (en) * | 2016-05-30 | 2019-12-10 | 公安部第一研究所 | Channel type dangerous liquid detection device and method |
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