WO2018121504A1 - 安检扫描方法、装置和系统 - Google Patents

安检扫描方法、装置和系统 Download PDF

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Publication number
WO2018121504A1
WO2018121504A1 PCT/CN2017/118525 CN2017118525W WO2018121504A1 WO 2018121504 A1 WO2018121504 A1 WO 2018121504A1 CN 2017118525 W CN2017118525 W CN 2017118525W WO 2018121504 A1 WO2018121504 A1 WO 2018121504A1
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Prior art keywords
liquid
tested
liquid container
tray
detection
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Ceased
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PCT/CN2017/118525
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English (en)
French (fr)
Inventor
刘晶晶
王强
廖育华
吴珊珊
张金宇
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Nuctech Co Ltd
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Nuctech Co Ltd
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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
    • 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
    • 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

Definitions

  • the present disclosure relates to the field of security, and in particular to a security scanning method, apparatus and system.
  • One purpose of the present disclosure is to improve the efficiency of security detection.
  • a security scan method comprising: acquiring a line package scan data; identifying an identifier of a liquid container tray in the line package scan data; and presenting an identifier in the line package scan data Next, perform a liquid detection operation.
  • the security scanning method further comprises: identifying the liquid container in the line package scan data; and in the case of determining that the liquid container is present, issuing an alarm message to prompt the liquid container to be placed in the liquid container tray to perform the liquid detecting operation.
  • performing the liquid detecting operation comprises: acquiring the detection data of the liquid to be tested by the dual energy X-ray detector; determining the effective atomic number and the characteristic density of the liquid to be tested according to the detection data of the liquid to be tested.
  • the security scanning method further comprises: determining a hazard level of the liquid to be tested based on the predetermined classification data according to the effective atomic number and the feature density of the liquid to be tested; and issuing the alarm information according to the hazard level.
  • determining the hazard level of the liquid to be tested includes performing an operation of determining a hazard level of the liquid to be tested if the volume of the liquid container is greater than a predetermined threshold volume.
  • the sending the alarm information according to the hazard level includes: issuing an alarm according to at least one of a sound, a text, a graphic, or a color identifier according to the hazard level of the liquid to be tested.
  • determining the effective atomic number and characteristic density of the liquid to be tested comprises: determining, according to the predetermined base material information, a base material decomposition coefficient of the liquid to be tested according to the detected data of the liquid to be tested; and a base material decomposition coefficient according to the liquid to be tested Determine the effective atomic number and characteristic density of the liquid to be tested.
  • the security scanning method further comprises: determining, according to at least one of the predetermined identification position or the predetermined identification posture, whether the placement of the liquid container tray meets the requirement according to the liquid container tray identifier in the line package scan data; The liquid detection operation is performed in the case; if the requirements are not met, an alarm message is issued to prompt the liquid container tray to be repositioned.
  • the liquid container tray identifier in the package scan data can be identified, and the liquid detection mode can be switched to the liquid detection mode to detect the liquid carried on the tray in the detection area, thereby realizing the detection of the package and the liquid by using a single device.
  • the liquid detection mode can be switched to the liquid detection mode to detect the liquid carried on the tray in the detection area, thereby realizing the detection of the package and the liquid by using a single device.
  • a security scanning apparatus comprising: a line packet scanning module configured to acquire line package scanning data; and a tray identification identifying module configured to identify in the line package scanning data An identification of the liquid container tray; and a liquid detection module configured to perform a liquid detection operation in the presence of the liquid container tray identification in the package scan data.
  • the security scanning device further comprises: a liquid container identification module configured to identify the liquid container in the package scan data; and an alarm module configured to issue an alarm message to prompt the presence of the liquid container
  • a liquid container identification module configured to identify the liquid container in the package scan data
  • an alarm module configured to issue an alarm message to prompt the presence of the liquid container The liquid container is placed in the liquid container tray to perform a liquid detecting operation.
  • the liquid detecting module comprises: a detecting data acquiring unit configured to acquire the detecting data of the liquid to be tested by the dual energy X-ray detector; and a liquid information determining unit configured to determine according to the detecting data of the liquid to be tested The effective atomic number and characteristic density of the liquid to be tested.
  • the security scanning device further includes: a danger level determining module configured to determine a hazard level of the liquid to be tested based on the predetermined classification data according to the effective atomic number and the feature density of the liquid to be tested; the hazard warning module is configured to be configured according to The hazard level sends an alarm message.
  • a danger level determining module configured to determine a hazard level of the liquid to be tested based on the predetermined classification data according to the effective atomic number and the feature density of the liquid to be tested
  • the hazard warning module is configured to be configured according to The hazard level sends an alarm message.
  • the hazard level determining module comprises: a volume recognizing unit configured to acquire a volume of the liquid container according to the detected data, and compare the volume of the liquid container with a predetermined threshold volume, wherein the volume of the liquid container is greater than a predetermined threshold volume And activating the danger level judging unit; the hazard level judging unit is configured to determine the hazard level of the liquid to be tested based on the predetermined classification data according to the effective atomic number and the characteristic density of the liquid to be tested.
  • the hazard warning module is specifically configured to issue an alarm by at least one of a sound, a text, a graphic, or a color identifier according to a hazard level of the liquid to be tested.
  • the liquid information determining unit is configured to: determine a base material decomposition coefficient of the liquid to be tested according to the detection data of the liquid to be tested based on the predetermined base material information; and determine the effectiveness of the liquid to be tested according to the base material decomposition coefficient of the liquid to be tested Atomic number and feature density.
  • the security scanning device further includes: a tray placement verification module configured to determine the pendulum of the liquid container tray based on at least one of a predetermined identification position or a predetermined identification posture according to the liquid container tray identifier in the package scan data Whether the discharge meets the requirements; if the requirements are met, the liquid detection module performs the liquid detection operation; if the requirements are not met, the activation alarm module issues an alarm message to prompt the reposition of the liquid container tray.
  • a tray placement verification module configured to determine the pendulum of the liquid container tray based on at least one of a predetermined identification position or a predetermined identification posture according to the liquid container tray identifier in the package scan data Whether the discharge meets the requirements; if the requirements are met, the liquid detection module performs the liquid detection operation; if the requirements are not met, the activation alarm module issues an alarm message to prompt the reposition of the liquid container tray.
  • a security scanning apparatus comprising: a memory; and a processor coupled to the memory, the processor configured to perform any one of the security scans as described above based on the instructions stored in the memory method.
  • Such a device can identify the liquid container tray identifier in the package scan data, and timely switch to the liquid detection mode to detect the liquid carried on the tray in the detection area, thereby realizing the detection of the package and the liquid by using a single device without configuration.
  • Separate liquid testing equipment improves the integration of the equipment; no need to check the liquid one by one, which improves the efficiency of security inspection.
  • a computer readable storage medium having stored thereon computer program instructions that, when executed by a processor, implements the steps of any of the security scanning methods described above.
  • the liquid container tray identifier in the line package scan data can be identified, and the liquid detection mode can be switched to the liquid detection mode to detect the liquid carried on the tray in the detection area, thereby realizing the use of a single device.
  • the liquid detection mode can be switched to the liquid detection mode to detect the liquid carried on the tray in the detection area, thereby realizing the use of a single device.
  • a security system comprising: a transport mechanism configured to drive a packet motion; a source of radiation and a ray detector configured to acquire probe data; and Any kind of security scanning device.
  • Such a security inspection system can identify the liquid container tray identifier in the package scan data, and timely switch to the liquid detection mode to detect the liquid carried on the tray in the detection area, thereby realizing the detection of the package and the liquid by using a single device, without
  • the separate liquid detection equipment is configured to improve the integration of the equipment; the liquid is not required to be detected one by one, which improves the safety inspection efficiency.
  • FIG. 1 is a flow chart of some embodiments of a security scanning method of the present disclosure.
  • FIG. 2 is a schematic illustration of some embodiments of a liquid container tray in a security inspection method of the present disclosure.
  • FIG. 3 is a flow chart of still other embodiments of the security scanning method of the present disclosure.
  • Figure 5 is a schematic illustration of some embodiments of a security scanning device of the present disclosure.
  • Figure 6 is a schematic illustration of further embodiments of the security scanning device of the present disclosure.
  • FIG. 7 is a schematic diagram of still further embodiments of a security scanning device of the present disclosure.
  • Figure 8 is a schematic illustration of still further embodiments of the security scanning device of the present disclosure.
  • FIG. 9 is a schematic illustration of some of the embodiments of the security scanning device of the present disclosure.
  • Figure 10 is a schematic illustration of further embodiments of the security scanning device of the present disclosure.
  • FIG. 11 is a schematic illustration of some embodiments of a security system of the present disclosure.
  • FIG. 1 A flow chart of some embodiments of the security scanning method of the present disclosure is shown in FIG.
  • step 101 the packet scan data of the detection area is acquired.
  • the object to be tested passes through the detection area under the driving mechanism, wherein the package scan data may be data for scanning ordinary parcels and luggage moving relative to the detection area.
  • the liquid container is placed on the liquid container tray, which is carried by the transport mechanism through the detection area.
  • step 102 it is determined whether there is a liquid container tray identifier in the line package scan data. If the liquid container tray identifier is identified in the package scan data, it is confirmed that the liquid container tray enters the detection area, and step 103 is performed; otherwise, it is considered that the liquid container detection is not required, and the process returns to step 101 to continue the line package detection.
  • step 103 switching to the liquid detection mode, a liquid detecting operation is performed.
  • a CT (Computed Tomography) device can perform liquid detection during scanning of a line package, and can describe the material property of the liquid without taking out a liquid bottle, thereby performing danger level judgment.
  • current CT instruments are relatively expensive, occupy a large area, and have a low pass rate, which reduces the efficiency of security inspection.
  • the liquid container tray identifier in the line package scan data can be identified, and the liquid detection mode is switched to the liquid detection mode to detect the liquid carried on the tray in the detection area, thereby realizing the implementation of the line package by using a single device.
  • liquid detection no need to configure a separate liquid detection equipment, improve the integration of the equipment; no need to separate the liquid one by one, improving the security efficiency.
  • FIG. 2 A schematic of some embodiments of a liquid container tray in the security scanning method of the present disclosure is shown in FIG.
  • 1 is a liquid container tray identification
  • the security inspection system can determine that the liquid container tray enters the detection area by recognizing the liquid container tray identification 1, thereby starting liquid detection.
  • the liquid container tray identifier may be a metal marker, such as a metal strip having a high atomic number, and each strip may have a positioning structure, such as a plurality of hollowed out (ie, positioning holes), each hollowed out The size is different, and the distance between the hollows can also be different.
  • the marker can be segmented by using the difference in atomic number in the probe data to extract the region of the marker.
  • the positioning hole on the marker is identified, and the slope difference between the two sides of the marker and the number of the positioning holes are used to determine whether the scanned row package is a tray, and the position and positioning of the positioning hole are solved.
  • the distance between the holes and the slope of the center of the one-sided positioning hole (or the line of the one-sided mark) determine whether the placement of the tray is satisfactory. If the reservation request is not met, an alarm message is sent to request re-arrangement and the detection is performed again.
  • a tray identifier 1 may also be disposed at the other end of the liquid container tray, and the security inspection system can determine that the tray has completely entered the detection area by identifying the tray identifier, and when the tray identifier leaves the detection area At the end of the liquid detection, it is convenient for the security system to switch between the liquid detection and the packet detection modes.
  • the line packet detection state can be set to the resident state of the security inspection system, and when it is determined that the liquid container tray enters the detection area, the liquid detection state is switched; when it is determined that the liquid container tray leaves the detection area, the return packet detection state is switched.
  • the liquid container tray markings on either side of the liquid container tray can utilize different atomic numbers of metal to facilitate distinguishing the ends of the liquid container tray during the measurement process.
  • the tray can be found in time to leave the detection area, thereby switching to the packet detection mode in time, thereby further improving the detection efficiency.
  • the liquid container tray 2 is a base surface
  • 3 is a tray bottom
  • 4 is a card slot
  • the liquid container is placed in the card slot 4
  • the bottom of the liquid container faces the tray base surface 2.
  • the top is opposite to the base surface 2 in the opposite direction.
  • a single liquid container tray includes a plurality of card slots 4 to enable continuous detection of multiple liquid containers, improving liquid detection efficiency.
  • each of the card slots 4 includes a plurality of linear stems 5, 51 being the lower part of the linear stem, and 52 being the upper part of the linear stem, which can be secured by the fixation of the linear stem.
  • the stability of the liquid container relative to the liquid container tray further improves the accuracy of the detection.
  • FIG. 1 A flow chart of further embodiments of the security scanning method of the present disclosure is shown in FIG.
  • step 301 the packet scan data of the detection area is acquired.
  • the object to be tested passes through the detection area under the driving of the conveying mechanism, wherein the liquid container is placed on the liquid container tray, and the liquid container tray passes the detection area under the driving mechanism.
  • step 302 it is determined whether there is a liquid container tray identifier in the line package scan data. If the liquid container tray identifier is identified in the package scan data, it is confirmed that the liquid container tray enters the detection area, and step 303 is performed; otherwise, it is considered that the liquid container detection is not required, and the process returns to step 304.
  • step 303 a liquid detecting operation is performed.
  • step 304 it is determined whether there is a liquid container in the package based on the line package scan data. If a liquid container is present, step 305 is performed. If there is no liquid container, return to step 301 to continue performing line packet detection.
  • the edge image may be acquired from the scanned image; based on the edge image, based on the symmetry of the bottle, the candidate bottle region is determined by counting the symmetric axis-symmetric edge points of the scanning window within the scanning window, thereby selecting the desired bottle The area of the bottle is screened out in the area.
  • step 305 an alert message is sent to prompt the worker to remove the liquid container from the bag and place it in the liquid container tray to perform a liquid detecting operation.
  • the location and number of liquid containers can be prompted by the image labeling the area of the bottle. Then proceed to step 301.
  • the liquid container hidden in the bag can be found in time, thereby preventing the leakage inspection of the liquid in the bag, improving the tightness of the security inspection, and improving the security inspection effect.
  • the detection data of the liquid to be tested may be acquired by a dual-energy X-ray detector; and the base material decomposition coefficient of the liquid to be tested is determined according to the detection data of the liquid to be tested based on the predetermined base material information, in the predetermined base material information. Including the correlation information between the detection data and the decomposition amount, and calculating the base material decomposition coefficient of the liquid to be tested according to the thickness of the ray passing through the liquid; determining the effective atomic number and characteristics of the liquid to be tested according to the decomposition coefficient of the base material of the liquid to be tested density.
  • the predetermined base material information includes a correspondence between the dual energy detection data and the amount of decomposition.
  • a base material coefficient table may be pre-established, and the base material coefficient table stores predetermined base material information. Since the effective atomic number and characteristic density are two important indicators of liquid materials, such a method can effectively classify liquids and identify hazard levels, thereby achieving the purpose of liquid safety testing.
  • predetermined base material information may be pre-generated and stored to facilitate matching calls.
  • a combination of a plurality of base material thicknesses can be scanned, and a matrix of material coefficients can be created by interpolation. Since the required thickness combination is too much and it is difficult to cover the entire data space completely, the high and low energy spectrum of the dual energy X-ray system can be estimated by means of the energy spectrum calibration component, and then the appropriate spectrum is selected based on the energy spectrum.
  • the spectroscopic calibrator can be composed of two or more substances, typically using common, easily processable materials such as polymethyl methacrylate PMMA and aluminum Al, carbon C and Al, or PMMA, Al and iron Fe.
  • the maximum likelihood estimation method can be employed for the energy spectrum estimation; two or more different substances can be used as the base material for the selection of the base material, and the substance can be either a simple substance or a mixture.
  • Common two base materials may be C and Al, C and Fe, boron B and Al, B and Fe, polyethylene PE and Al, PMMA and Al, and the like.
  • a relatively complete predetermined base material information table can be established, so that the query can be performed based on the data table during the detection process, which facilitates rapid liquid detection and improves liquid detection efficiency.
  • the objective function may be set, and the target function optimization algorithm is used to determine the base material decomposition coefficient of the liquid to be tested based on the decomposition amount and the liquid container size information. For example, set the objective function to:
  • B i,1 is the first decomposition amount obtained according to the detection data of the ray i;
  • B i,2 is the second decomposition amount obtained according to the detection data of the ray i;
  • d tray,i is the liquid container through which the ray i passes
  • b container, 1 is the first base material decomposition coefficient of the container, b container, 2 the second base material decomposition coefficient of the container, i is the ray identification, i is a natural number and 1 ⁇ i ⁇ N, N is the total number of LOR (Line of Response) passing through the liquid; the first base material de
  • the liquid container size information and the first decomposition amount, the first decomposition amount, and the base material decomposition coefficient of the liquid to be tested can be determined according to the first decomposition amount, the first decomposition amount, and the liquid container size information. Therefore, the use of dual energy X-rays for detecting and identifying the liquid to be tested is realized, and the efficiency of liquid detection is improved.
  • an empty liquid container tray can be scanned in advance to obtain tray related information and stored.
  • the tray related information includes tray geometry information and tray material information.
  • the tray geometry information includes the position and size of each card slot in both directions of the scanned image, as well as geometric parameters associated with container information extraction.
  • Pallet material information solution used to eliminate the effect of the tray on the results when calculating liquid material information. Scanning the empty tray can accurately capture the material of the bottom surface of the tray in the liquid area.
  • the material information of the tray is actually expressed as the base material decomposition coefficient of the bottom surface of the unit thickness.
  • the base material decomposition coefficient of the tray includes a predetermined first base material decomposition coefficient and a predetermined second base material decomposition coefficient.
  • the geometry and material information of the tray can be obtained relatively accurately, and the influence of the tray on the detection data is fully considered in the case where the liquid container is placed on the liquid container tray, and the operation is ensured while maintaining the stability of the liquid to be tested. Accuracy to further improve the accuracy of liquid detection.
  • the parameter d liquid,i it is necessary to obtain geometric information of the liquid.
  • the geometrical information of most liquids can be directly derived from the geometric information of the container. For example, if the container geometry is circular, the radius of the liquid is the radius of the container minus the wall thickness of the container.
  • the liquid level can be extracted from the perspective image data.
  • the liquid level can be directly extracted from the side view image data; if the container body is perpendicular to the belt conveying direction, The arcuate boundary of the liquid surface can be extracted from the image data of the bottom viewing angle, and the height of the liquid surface can be determined in conjunction with the geometry of the container.
  • the liquid level can be used as a parameter to be solved during the objective function solving process, and the liquid level can be obtained in the optimization solution.
  • the first base material decomposition coefficient, the second base material decomposition coefficient, the first predetermined feature density, and the second predetermined feature density may be Determine the characteristic density of the liquid to be tested, as per the formula:
  • a characteristic density ⁇ liquid * of the liquid to be tested wherein b liquid, 1 is a first base material decomposition coefficient, b liquid, 2 is a second base material decomposition coefficient, ⁇ 1 * is a first predetermined feature density, ⁇ 2 * Is the second predetermined feature density.
  • the characteristic density of the liquid to be tested can be obtained from the first base material decomposition coefficient and the second base material decomposition coefficient. Since the feature density is an important indicator of liquid identification, it can contribute to liquid identification and risk judgment, and achieve safe detection of liquid.
  • the first base material decomposition coefficient, the second base material decomposition coefficient, the first predetermined feature density, and the second predetermined feature density may be The first predetermined effective atomic number and the second predetermined effective atomic number determine the effective atomic number of the liquid to be tested, such as according to the formula:
  • n is a predetermined constant.
  • n can be determined empirically or based on the detection effect.
  • n can take a value of 3.5. Since the effective atomic number is an important indicator of liquid identification, it can contribute to liquid identification and risk judgment, and achieve safe detection of liquid.
  • the hazard level of the liquid to be tested can be determined based on the predetermined classification data.
  • the correspondence between the effective atomic number and the feature density and the hazard level may be included in the predetermined classification data.
  • a predetermined classifier can be utilized to determine the hazard level of the liquid to be tested and to issue an alert message based on the hazard level.
  • the design of the classifier can be performed using a variety of design methods.
  • Liquid material (atomic number and feature density) data can be represented in a two-dimensional coordinate system.
  • the two-dimensional coordinate system is normalized.
  • the minimum error rate or minimum risk decision strategy the two-dimensional area is divided into multiple regions, each with its own hazard level.
  • SVM Small Vector Machine
  • the [liquid atomic number, liquid characteristic density, liquid hazard level] is used as input for classifier training, and the classification effects of various kernel functions are compared, and an appropriate kernel function is selected.
  • the sample training can be performed again to obtain a better classifier.
  • a dimension can be set for each added data to indicate its hazard. For example, for concentrated sulfuric acid, the hazard level is set to 1, which facilitates the acquisition of visually identified liquid hazard information.
  • the volume of the liquid can be estimated based on the geometric information of the liquid. If the volume of the liquid is less than the threshold, the classification of the hazard is not performed. On the one hand, it satisfies the industry's security inspection rules, avoids false alarms for small-capacity liquids; on the other hand, it reduces the computational complexity of the equipment and improves the security inspection efficiency.
  • alarms may be used in different manners for different hazard levels. For high hazard levels, emergency alert + frame prompts may be used; for suspicious items, normal alarm + frame prompts may be used; For low level, you can use only the frame prompt or no prompt. In the case of frame prompts, the hazard level can be indicated in different colors, or text indicating the hazard level can be added.
  • the risk of the liquid to be tested can be more intuitively conveyed to the user, thereby facilitating the worker to find the dangerous item in time and perform corresponding operations.
  • FIG. 1 A flow chart of still further embodiments of the security scanning method of the present disclosure is shown in FIG.
  • step 401 the packet scan data of the detection area is acquired.
  • the object to be tested passes through the detection area under the driving of the conveying mechanism, wherein the liquid container is placed on the liquid container tray, and the liquid container tray passes the detection area under the driving mechanism.
  • step 402 it is determined whether there is a liquid container tray identifier in the line package scan data. If the liquid container tray identifier is identified in the package scan data, it is confirmed that the liquid container tray enters the detection area, and step 405 is performed; otherwise, it is considered that the liquid container detection is not required, and the process returns to step 403.
  • step 403 it is determined whether the liquid container is present in the package based on the line package scan data. If a liquid container is present, step 404 is performed. If there is no liquid container, return to step 401 to continue performing line packet detection.
  • the edge image may be acquired from the scanned image; based on the edge image, based on the symmetry of the bottle, the candidate bottle region is determined by counting the symmetric axis-symmetric edge points of the scanning window within the scanning window, thereby selecting the desired bottle The area of the bottle is screened out in the area.
  • step 404 an alert message is issued to prompt the worker to remove the liquid container from the bag and place it in the liquid container tray to perform a liquid detecting operation, and then step 401 is performed.
  • the location and number of liquid containers can be prompted by the image labeling the area of the bottle.
  • step 405 it is determined whether the placement of the liquid container tray meets the requirements. If the requirements are met, step 407 is performed; if the requirements are not met, step 406 is performed. In some embodiments, it may be determined whether the placement of the liquid container tray meets the requirements based on the predetermined identification position, the predetermined identification posture. In some embodiments, the placement of the tray can be determined by solving the position of the locating holes on the liquid container tray, the distance between the locating holes, and the slope of the center of the one-sided locating hole (or the line of the one-sided marker).
  • step 406 an alert message is sent to alert the worker to reposition the liquid container tray.
  • a liquid detecting operation is performed.
  • the liquid detection operation can be performed by any of the methods mentioned above.
  • a hazard level of the liquid to be tested is determined.
  • the liquid hazard level determination can be performed using the predetermined classifiers mentioned above based on the effective atomic number and characteristic density of the liquid to be tested.
  • step 409 corresponding alarm information is issued according to the danger level.
  • alerts may be issued in different ways for different hazard levels to more intuitively communicate the risk of the liquid to be tested to the user.
  • the liquid container tray identifier in the line package scan data can be identified, and the liquid detection mode can be switched in time, thereby realizing the detection of the line package and the liquid by using a single device; the liquid container hidden in the package can be detected and prompted to work.
  • the personnel are taken out, thereby avoiding the leak detection of the liquid, improving the reliability of the security inspection; improving the accuracy of the liquid detection by verifying the relative orientation of the ray direction and the liquid container by checking the placement of the tray; using the dual energy X detection data
  • the analysis method is used to obtain liquid material information, which improves the detection efficiency; different types of alarm information can be used to display the hazard level of the liquid to be tested, thereby further improving the reliability of the security inspection.
  • the line packet scanning module 501 is capable of acquiring line packet scan data of the detection area.
  • the object to be tested passes through the detection area under the driving of the conveying mechanism, wherein the liquid container is placed on the liquid container tray, and the liquid container tray passes the detection area under the driving mechanism.
  • the tray identification recognition module 502 can determine whether a liquid container tray identifier is present in the package scan data. If the liquid container tray identifier is identified in the line package scan data, the activated liquid detection module 503 performs a liquid detection operation; if the liquid container tray identification is not recognized in the line package scan data, the line package scanning module 501 continues to perform the line package probe.
  • Such a device can identify the liquid container tray identifier in the package scan data, and timely switch to the liquid detection mode to detect the liquid carried on the tray in the detection area, thereby realizing the detection of the package and the liquid by using a single device without configuration.
  • Separate liquid testing equipment improves the integration of the equipment; it does not require separate testing of the liquid, which improves the efficiency of the inspection.
  • both ends of the liquid container tray respectively include a liquid container tray identifier, and when the detector detects the liquid container tray identifier at one end, it is determined that the liquid container tray enters the detection area to perform a liquid detecting operation; When the liquid container tray mark enters the detection area, it is determined that the liquid container tray completely enters the detection area. When the liquid detection in the area between the liquid container tray marks at both ends is completed, the liquid detection ends, and the return to the line detection mode is switched in time. Such a device can detect the completion of liquid detection in time, thereby switching to the packet detection mode in time to further improve the detection efficiency.
  • FIG. 6 A schematic diagram of further embodiments of the security scanning device of the present disclosure is shown in FIG.
  • the structure and function of the line package scanning module 601, the tray identification recognition module 602, and the liquid detection module 603 are similar to those in the embodiment of FIG.
  • the security scanning device further includes a liquid container identification module 604 and an alarm module 605 capable of determining whether a liquid container is present in the package based on the line package scan data. If there is a liquid container, the activation alarm module 605 issues an alarm message to prompt the worker to take the liquid container out of the bag and place it in the liquid container tray to perform a liquid detecting operation.
  • the alert module 605 can prompt the location and number of liquid containers by way of an image labeling the area of the bottle. If the liquid container is not detected from the line package scan data, the line package scanning module 501 continues the line packet detection.
  • Such a device can timely discover the liquid container hidden in the bag, thereby preventing the leakage inspection of the liquid in the bag, improving the tightness of the security inspection, and improving the security inspection effect.
  • the liquid detecting module 603 can acquire the detection data of the liquid to be tested through the dual-energy X-ray detector; and determine the base material decomposition coefficient of the liquid to be tested according to the detection data of the liquid to be tested based on the predetermined base material information, and predetermined
  • the base material information includes the correlation information between the detection data and the decomposition amount, and the calculation of the thickness of the liquid through the liquid can be obtained, and the decomposition coefficient of the base material of the liquid to be tested can be obtained; and the effective decomposition of the liquid to be tested is determined according to the decomposition coefficient of the base material of the liquid to be tested.
  • Atomic number and feature density Since the effective atomic number and characteristic density are two important indicators of liquid materials, such a device can effectively classify liquids and perform hazard identification to achieve liquid safety testing.
  • the objective function can be set, and the liquid detection module 603 uses the objective function optimization algorithm to determine the base material decomposition coefficient of the liquid to be tested based on the decomposition amount and the liquid container size information.
  • the objective function can be as shown in equation (1) mentioned above.
  • Such a device can obtain liquid container size information and a first decomposition amount, a first decomposition amount according to the detection data, and determine a base material decomposition coefficient of the liquid to be tested according to the first decomposition amount, the first decomposition amount, and the liquid container size information, thereby
  • the use of dual energy X-rays for detecting and identifying the liquid to be tested is realized, and the efficiency of liquid detection is improved.
  • the liquid detection module 603 needs to acquire geometric information of the liquid.
  • the geometrical information of most liquids can be directly derived from the geometric information of the container. For example, if the container geometry is circular, the radius of the liquid is the radius of the container minus the wall thickness of the container.
  • the liquid level can be extracted from the perspective image data.
  • the liquid level can be directly extracted from the side view image data; if the container body is perpendicular to the belt conveying direction, The arcuate boundary of the liquid surface can be extracted from the image data of the bottom viewing angle, and the height of the liquid surface can be determined in conjunction with the geometry of the container.
  • the liquid level can be used as a parameter to be solved during the objective function solving process, and the liquid level can be obtained in the optimization solution.
  • Such a device is capable of acquiring geometric information of the liquid, thereby increasing the known parameters in the objective function and improving the reliability of the liquid detection.
  • the liquid detection module 603 can calculate the volume of the liquid based on the geometric information of the liquid, if the volume of the liquid is less than the threshold, because the liquid having a volume less than the threshold can be protected from the danger detection according to the safety inspection rules of certain industries.
  • the value does not need to determine the decomposition coefficient of the liquid, nor does it need to calculate the effective atomic number and characteristic density of the liquid, thereby further reducing the calculation amount of the device and improving the security efficiency.
  • the characteristic density and the effective atomic number of the liquid to be tested may be obtained by using the formula (2) (3) mentioned above. Therefore, it is convenient to judge the liquid hazard level based on these two parameters, and achieve the purpose of liquid detection.
  • FIG. 1 A schematic diagram of still further embodiments of the security scanning device of the present disclosure is shown in FIG.
  • the structure and function of the line package scanning module 701, the tray identification recognition module 702, and the liquid detection module 703 are similar to those in the embodiment of FIG.
  • the security scanning device also includes a hazard level determination module 704 and a hazard alarm 705.
  • the hazard level determination module 704 determines the hazard level of the liquid to be tested using the predetermined classifier; the hazard warning 705 can issue the alarm information according to the hazard level.
  • Such a device can convert the effective atomic number and characteristic density information into specific hazard level information and communicate it to the staff, so that the staff can respond accordingly and optimize the security check effect.
  • the risk level determination module 704 can estimate the volume of the liquid according to the geometric information of the liquid obtained by the liquid detecting module 703, according to the security rules of certain industries, the liquid having a volume less than the threshold can be prevented from being dangerously detected. If the threshold is less than the threshold, the classification of the hazard level is not carried out, so that the security check rules of the industry are satisfied on the one hand, and the false alarm for the small-capacity liquid is avoided, and the calculation amount of the device is also reduced, and the security check efficiency is improved.
  • the hazard warning 705 can be alarmed in different manners for different hazard levels.
  • emergency alert + frame prompts can be used; for suspicious items, normal alarm + frame can be used. Tip; for low hazard levels, you can use only the frame prompt or no prompt.
  • the hazard level can be indicated in different colors, or text indicating the hazard level can be added.
  • FIG. 8 A schematic diagram of still further embodiments of the security scanning device of the present disclosure is shown in FIG.
  • the structure and function of the line package scanning module 801, the tray identification recognition module 802, the liquid detection module 803, the liquid container identification module 804, the alarm module 805, the hazard level determination module 807, and the hazard alarm 808 are similar to those of the embodiments of FIGS. 6 and 7.
  • the security scanning device further includes a tray placement verification module 806, and is connected with the tray identification recognition module 802, the liquid detection module 803, and the alarm module 805.
  • the liquid container tray identifier acquired by the tray identification recognition module 802 determines whether the liquid container tray is placed.
  • whether the placement of the liquid container tray meets the requirements can be determined according to the predetermined identification position and the predetermined identification posture.
  • the placement of the tray can be determined by solving the position of the locating holes on the liquid container tray, the distance between the locating holes, and the slope of the center of the one-sided locating hole (or the line of the one-sided marker). If the placement meets the requirements, the activated liquid detection module 803 performs liquid detection; if the placement does not meet the requirements, the activation alarm module 805 issues an alarm message to remind the staff to reposition the liquid container tray.
  • Such a device can identify the liquid container tray identifier in the package scan data, and switch to the liquid detection mode in time, thereby realizing the detection of the package and the liquid by using a single device; detecting the hidden liquid container in the package and prompting the staff to take out Therefore, the detection of leakage of the liquid is avoided, the reliability of the security inspection is improved; the accuracy of the liquid detection is improved by verifying the relative orientation of the ray direction and the liquid container by checking the placement of the tray; and the analysis of the dual energy X detection data is adopted.
  • the method provides liquid material information acquisition and improves the detection efficiency; different types of alarm information can be used to display the hazard level of the liquid to be tested, thereby further improving the reliability of the security inspection.
  • the security scanning device includes a memory 901 and a processor 902.
  • the memory 901 can be a magnetic disk, a flash memory or any other non-volatile storage medium.
  • the memory is for storing instructions in a corresponding embodiment of the security screening method above.
  • the processor 902 is coupled to the memory 901 and can be implemented as one or more integrated circuits, such as a microprocessor or a microcontroller.
  • the processor 902 is configured to execute instructions stored in the memory, and can realize detection of the line package and the liquid by using a single device, without separately configuring a separate liquid detecting device, thereby improving the integration degree of the device; without detecting the liquid one by one, the improvement is improved. Security efficiency.
  • the security scanning device 1000 includes a memory 1001 and a processor 1002.
  • the processor 1002 is coupled to the memory 1001 via a BUS bus 1003.
  • the security scanning device 1000 can also be connected to the external storage device 1005 through the storage interface 1004 to invoke external data, and can also be connected to the network or another computer system (not shown) through the network interface 1006. It will not be described in detail here.
  • the detection of the line package and the liquid can be realized by using a single device, and the separate liquid detecting device is not required, thereby improving the integration degree of the device; The liquid is tested one by one, which improves the efficiency of security inspection.
  • the present disclosure also provides a computer readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the steps of the method in the corresponding embodiment of the security scanning method.
  • a processor implements the steps of the method in the corresponding embodiment of the security scanning method.
  • embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware aspects. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program code. .
  • FIG. 11 is a transport mechanism.
  • the transport mechanism 11 moves in a direction perpendicular to the plane of the paper;
  • 12 is a radiation source capable of emitting X-rays in the direction of the object to be measured, and the radiation source is an X-ray emitter.
  • 13 is a detector capable of detecting radiation, and detector 13 is a dual-energy X-ray detector.
  • the security system also includes any of the security scanning devices mentioned above. When it is determined that the liquid container tray identification is present in the line package scan data, switching to the liquid detection mode, the liquid detection operation is performed. In some embodiments, the security system switches back to the packet detection mode when the liquid container tray leaves the detection zone or the detection of the liquid container in the tray is completed.
  • Such a security inspection system can identify the liquid container tray identifier in the package scan data, and timely switch to the liquid detection mode to detect the liquid carried on the tray in the detection area, thereby realizing the detection of the package and the liquid by using a single device, without
  • the separate liquid detection equipment is configured to improve the integration of the equipment; the liquid is not required to be detected one by one, which improves the safety inspection efficiency.
  • such equipment can be improved and upgraded on the basis of relevant security inspection systems, reducing implementation costs and facilitating promotion.
  • the device when the device is in the line package detection mode, it can be determined whether there is a liquid container in the bag, and if a liquid container is found in the bag, an alarm message is sent to prompt the worker to take the liquid container out of the bag, and Place the liquid container tray to perform the liquid detection operation.
  • Such a security inspection system can timely discover the liquid container hidden in the package, thereby preventing the leakage inspection of the liquid in the package, improving the tightness of the security inspection, and improving the security inspection effect.

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Abstract

一种安检扫描方法、装置和设备，涉及安检领域。安检扫描方法包括：获取行包扫描数据（101）；识别行包扫描数据中的液体容器托盘标识（1）（102）；在行包扫描数据中存在液体容器托盘标识（1）的情况下，执行液体检测操作（103）。通过这样的方法，能够识别行包扫描数据中的液体容器托盘标识（1），及时切换到液体检测模式，对探测区域中托盘上承载的液体进行检测，从而实现了采用单个设备实现行包和液体的检测，无需配置单独的液体检测设备，提高了设备的集成度；无需对液体进行单独逐个检测，提高了安检效率。

Description

安检扫描方法、装置和系统
本公开是以CN申请号为201611239985.9，申请日为2016年12月29日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本公开中。
技术领域
本公开涉及安检领域，特别是一种安检扫描方法、装置和系统。
背景技术
目前，在民航安全检查操作规范中，100毫升以上的液体是禁止携带的。在地铁安检过程中，也需要对于乘客携带的液体进行单独检查。
在地铁、机场等公共场所，经常会遇到乘客携带装有液体的包裹通过安全检查口，此时需要提醒旅客取出液体容器，采用试喝的方式或者采用液体仪进行单独检查。但是液体仪的扫描空间有限，降低了安检效率。
发明内容
本公开的一个目的在于提高安全检测的效率。
根据本公开的一些实施例的一个方面，提出一种安检扫描方法，包括：获取行包扫描数据；识别行包扫描数据中的液体容器托盘的标识；和在行包扫描数据中存在标识的情况下，执行液体检测操作。
可选地，安检扫描方法还包括：识别行包扫描数据中的液体容器；在确定存在液体容器的情况下，发出告警信息以提示将液体容器放入液体容器托盘中执行液体检测操作。
可选地，执行液体检测操作包括：通过双能X射线探测器获取待测液体的探测数据；根据待测液体的探测数据确定待测液体的有效原子序数和特征密度。
可选地，安检扫描方法还包括：根据待测液体的有效原子序数和特征密度，基于预定分类数据确定待测液体的危险等级；根据危险等级发出告警信息。
可选地，确定待测液体的危险等级包括：在液体容器的体积大于预定门限体积的情况下，执行确定待测液体的危险等级的操作。
可选地，根据危险等级发出告警信息包括：根据待测液体的危险等级，通过声音、文字、图形或色彩标识中的至少一种方式发出告警。
可选地，确定待测液体的有效原子序数和特征密度包括：基于预定基材料信息，根据待测液体的探测数据确定待测液体的基材料分解系数；和根据待测液体的基材料分解系数确定待测液体的有效原子序数和特征密度。
可选地，安检扫描方法还包括：根据行包扫描数据中的液体容器托盘标识，基于预定标识位置或预定标识姿态中的至少一种判断液体容器托盘的摆放是否符合要求；在符合要求的情况下执行液体检测操作；在不符合要求的情况下，发出告警信息以提示重新摆放液体容器托盘。
通过这样的方法，能够识别行包扫描数据中的液体容器托盘标识，及时切换到液体检测模式对探测区域中托盘上承载的液体进行检测，从而实现了采用单个设备实现行包和液体的检测，无需配置单独的液体检测设备，提高了设备的集成度；无需对液体进行单独逐个检测，提高了安检效率。
根据本公开的一些实施例的另一个方面，提出一种安检扫描装置，包括：行包扫描模块，被配置为获取行包扫描数据；托盘标识识别模块，被配置为识别行包扫描数据中的液体容器托盘的标识；和液体检测模块，被配置为在行包扫描数据中存在液体容器托盘标识的情况下，执行液体检测操作。
可选地，安检扫描装置还包括：液体容器识别模块，被配置为识别行包扫描数据中的液体容器；和，告警模块，被配置为在确定存在液体容器的情况下，发出告警信息以提示将液体容器放入液体容器托盘中执行液体检测操作。
可选地，液体检测模块包括：探测数据获取单元，被配置为通过双能X射线探测器获取待测液体的探测数据；和，液体信息确定单元，被配置为根据待测液体的探测数据确定待测液体的有效原子序数和特征密度。
可选地，安检扫描装置还包括：危险等级确定模块，被配置为根据待测液体的有效原子序数和特征密度，基于预定分类数据确定待测液体的危险等级；危险告警模块，被配置为根据危险等级发出告警信息。
可选地，危险等级确定模块包括：体积识别单元，被配置为根据探测数据获取液体容器的体积，并将液体容器的体积与预定门限体积进行比较，在液体容器的体积大于预定门限体积的情况下，激活危险等级判断单元；危险等级判断单元，被配置为根据待测液体的有效原子序数和特征密度，基于预定分类数据判断待测液体的危险等级。
可选地，危险告警模块具体被配置为根据待测液体的危险等级，通过声音、文字、图形或色彩标识中的至少一种发出告警。
可选地，液体信息确定单元被配置为：基于预定基材料信息，根据待测液体的探测数据确定待测液体的基材料分解系数；根据待测液体的基材料分解系数确定待测液体的有效原子序数和特征密度。
可选地，安检扫描装置还包括：托盘摆放验证模块，被配置为根据行包扫描数据中的液体容器托盘标识，基于预定标识位置或预定标识姿态中的至少一种判断液体容器托盘的摆放是否符合要求；在符合要求的情况下，液体检测模块执行液体检测操作；在不符合要求的情况下，激活告警模块发出告警信息以提示重新摆放液体容器托盘。
根据本公开一些实施例的又一个方面，提出一种安检扫描装置，包括：存储器；以及耦接至存储器的处理器，处理器被配置为基于存储在存储器的指令执行如上文中任意一种安检扫描方法。
这样的装置能够识别行包扫描数据中的液体容器托盘标识，及时切换到液体检测模式对探测区域中托盘上承载的液体进行检测，从而实现了采用单个设备实现行包和液体的检测，无需配置单独的液体检测设备，提高了设备的集成度；无需对液体进行逐个检测，提高了安检效率。
根据本公开一些实施例的再一个方面，提出一种计算机可读存储介质，其上存储有计算机程序指令，该指令被处理器执行时实现上文中任意一种安检扫描方法的步骤。
通过执行这样的计算机可读存储介质上的指令，能够识别行包扫描数据中的液体容器托盘标识，及时切换到液体检测模式对探测区域中托盘上承载的液体进行检测，从而实现了采用单个设备实现行包和液体的检测，无需配置单独的液体检测设备，提高了设备的集成度；无需对液体进行逐个检测，提高了安检效率。
另外，根据本公开的一些实施例的一个方面，提出一种安检系统，包括：传送机构，被配置为带动行包运动；射线源和射线探测器，被配置为获取探测数据；和上文中提到的任意一种安检扫描装置。
这样的安检系统能够识别行包扫描数据中的液体容器托盘标识，及时切换到液体检测模式对探测区域中托盘上承载的液体进行检测，从而实现了采用单个设备实现行包和液体的检测，无需配置单独的液体检测设备，提高了设备的集成度；无需对液体进行逐个检测，提高了安检效率。
附图说明
此处所说明的附图用来提供对本公开的进一步理解，构成本申请的一部分，本公 开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。在附图中：
图1为本公开的安检扫描方法的一些实施例的流程图。
图2为本公开的安检扫描方法中液体容器托盘的一些实施例的示意图。
图3为本公开的安检扫描方法的另一些实施例的流程图。
图4为本公开的安检扫描方法的又一些实施例的流程图。
图5为本公开的安检扫描装置的一些实施例的示意图。
图6为本公开的安检扫描装置的另一些实施例的示意图。
图7为本公开的安检扫描装置的又一些实施例的示意图。
图8为本公开的安检扫描装置的再一些实施例的示意图。
图9为本公开的安检扫描装置的其中一些实施例的示意图。
图10为本公开的安检扫描装置的另外一些实施例的示意图。
图11为本公开的安检系统的一些实施例的示意图。
具体实施方式
下面通过附图和实施例，对本公开的技术方案做进一步的详细描述。
本公开的安检扫描方法的一些实施例的流程图如图1所示。
在步骤101中，获取探测区域的行包扫描数据。待测物体在传送机构的带动下经过探测区域，其中，行包扫描数据可以为对相对于探测区域运动的普通包裹、行李进行扫描的数据。当需要进行液体探测时，液体容器被放置在液体容器托盘上，液体容器托盘在传送机构的带动下经过探测区域。
在步骤102中，判断行包扫描数据中是否存在液体容器托盘标识。若在行包扫描数据中识别出液体容器托盘标识，则确认液体容器托盘进入探测区域，执行步骤103；否则，则认为无需进行液体容器探测，返回执行步骤101，继续进行行包探测。
在步骤103中，切换到液体检测模式，执行液体检测操作。
相关技术中，CT(Computed Tomography，电子计算机断层扫描)设备能够在扫描行包的过程中进行液体探测，无需拿出液体瓶即可刻画液体的材质属性，从而进行危险等级判断。但是，当前CT仪器较贵，且占地较大，行包通过率较低，降低了安检效率。
通过本公开上述实施例中的方法，能够识别行包扫描数据中的液体容器托盘标识， 及时切换到液体检测模式对探测区域中托盘上承载的液体进行检测，从而实现了采用单个设备实现行包和液体的检测，无需配置单独的液体检测设备，提高了设备的集成度；无需对液体进行单独逐个检测，提高了安检效率。
本公开的安检扫描方法中液体容器托盘的一些实施例的示意图如图2所示。在图2中，1为液体容器托盘标识，安检系统可以通过识别液体容器托盘标识1判断液体容器托盘进入探测区域，从而开始液体探测。在一些实施例中，液体容器托盘标识可以为金属标记物，如具有高原子序数的金属制的贴条，每个贴条上可以有定位结构，如若干个镂空(即定位孔)，各镂空大小不同，同时镂空之间的距离也可以不同。托盘识别时，可以利用探测数据中原子序数的不同进行标记物的分割，提取标记物的区域。在提取了金属标记物区域后，识别标记物上的定位孔，通过标记物两侧边界的斜率差异度和定位孔个数确定扫描的行包是否为托盘，并通过求解定位孔的位置、定位孔间的距离和单侧定位孔中心(或者单侧标记物中线)的斜率判断托盘的摆放是否合乎要求。若不符合预定要求，则发出告警信息请求重新摆放，再次进行检测。通过这样的方法，能够优化射线方向与液体容器的相对角度，提高液体探测的准确度。
在一些实施例中，如图2所示，可以在液体容器托盘的另一端也设置有托盘标识1，安检系统能够通过识别该托盘标识判断托盘已完全进入探测区域，当该托盘标识离开探测区域时，液体探测结束，从而便于安检系统在液体探测与行包探测两种模式之间进行切换。可以将行包探测状态设置为安检系统的常驻状态，当确定液体容器托盘进入探测区域时，切换到液体探测状态；当确定液体容器托盘离开探测区域时，切换回行包探测状态。在一些实施例中，液体容器托盘两侧的液体容器托盘标识可以采用不同原子序数的金属，便于在测量过程中区分液体容器托盘的两端。
通过这样的方法，能够及时发现托盘离开探测区域，从而及时切换到行包探测模式，进一步提高探测效率。
在一些实施例中，如图2所示，液体容器托盘的2为基底面，3为托盘底部，4为卡槽，液体容器被放置于卡槽4内，液体容器底部朝向托盘基底面2的方向，顶部朝向基底面2相反方向。在一些实施例中，单个液体容器托盘包括多个卡槽4，从而能够实现多个液体容器的连续探测，提高液体探测效率。
在一些实施例中，如图2所示，每个卡槽4内包括多个线状茎5，51为线状茎的下部，52为线状茎的上部，通过线状茎的固定能够保证液体容器的与液体容器托盘相对位置的稳定，进一步提高探测的准确度。
本公开的安检扫描方法的另一些实施例的流程图如图3所示。
在步骤301中，获取探测区域的行包扫描数据。待测物体在传送机构的带动下经过探测区域，其中，液体容器被放置在液体容器托盘上，液体容器托盘在传送机构的带动下经过探测区域。
在步骤302中，判断行包扫描数据中是否存在液体容器托盘标识。若在行包扫描数据中识别出液体容器托盘标识，则确认液体容器托盘进入探测区域，执行步骤303；否则，则认为无需进行液体容器探测，返回执行步骤304。
在步骤303中，执行液体检测操作。
在步骤304中，根据行包扫描数据判断包中是否存在液体容器。若存在液体容器，则执行步骤305。若不存在液体容器，则返回执行步骤301，继续执行行包探测。在一些实施例中，可以根据扫描图像获取边缘图像；根据边缘图像，基于瓶子的对称性，通过统计扫描窗口内关于扫描窗口的对称轴对称的边缘点确定待选瓶子区域，从而从待选瓶子区域中筛选出瓶子区域。
在步骤305中，发出告警信息以提示工作人员将液体容器从包中取出，并放入液体容器托盘中执行液体检测操作。在一些实施例中，可以通过图像标注瓶子区域的方式提示液体容器的位置和数量。继而继续执行步骤301。
通过这样的方法，能够及时发现隐藏在包中的液体容器，从而防止对包中液体的漏检查，提高安检的严密性，提高安检效果。
在一些实施例中，可以通过双能X射线探测器获取待测液体的探测数据；基于预定基材料信息，根据待测液体的探测数据确定待测液体的基材料分解系数，预定基材料信息中包括探测数据与分解量的关联信息，配合射线穿过液体的厚度进行计算，能够得到待测液体的基材料分解系数；根据待测液体的基材料分解系数确定待测液体的有效原子序数和特征密度。在一些实施例中，预定基材料信息中包括双能探测数据与分解量的对应关系。在一些实施例中，可以预先建立基材料系数表，基材料系数表中存储有预定基材料信息。由于有效原子序数和特征密度是液体材质的两个重要指标，通过这样的方法能够有效的对液体进行分类，并进行危险等级鉴定，从而达到液体安全检测的目的。
在一些实施例中，预定基材料信息可以预先生成并存储，便于匹配调用。在一些实施例中，可以扫描多种基材料厚度的组合、通过插值方法建立基材料系数表。由于所需厚度组合过多，并且较难全覆盖整个数据空间，因而，可以借助能谱标定件，先 估计出双能X射线系统的高、低能能谱，再基于该能谱，选择合适的基材料，虚拟构建基材料系数表。在一些实施例中，能谱标定件可以由两种或两种以上的物质组成，一般采用常见的、易加工的物质，如聚甲基丙烯酸甲酯PMMA和铝Al、碳C和Al，或者PMMA、Al和铁Fe。在一些实施例中，能谱估计可以采用最大似然估计法；基材料的选择上，可以使用两种或者多种不同的物质作为基材料，该物质可以是单质也可以是混合物。常见的两种基材料可为C和Al、C和Fe、硼B和Al、B和Fe、聚乙烯PE和Al、PMMA和Al等。
通过这样的方法，能够建立较为完善的预定基材料信息表，从而在检测过程中能够基于该数据表进行查询，便于迅速实现液体探测，提高液体探测效率。
在一些实施例中，可以设定目标函数，采用目标函数最优化算法根据分解量和液体容器尺寸信息确定待测液体的基材料分解系数。如，设置目标函数为：
Figure PCTCN2017118525-appb-000001
其中，B i,1为根据射线i的探测数据获取的第一分解量；B i,2为根据射线i的探测数据获取的第二分解量；d tray,i为射线i穿过的液体容器托盘厚度，b tray,1为液体容器托盘的预定第一基材料分解系数，b tray,2为液体容器托盘的预定第二基材料分解系数；d container,i为射线i穿过的容器厚度，d liquid,i为射线i穿过的液体厚度，b container,1为容器的第一基材料分解系数，b container,2容器的第二基材料分解系数，i为射线标识，i为自然数且1≤i≤N，N为穿过液体的LOR(Lineof Response，投影线)总数量；获取目标函数f最小时的第一基材料分解系数b liquid,1和第二基材料分解系数b liquid,2，从而实现待测液体的基材料分解系数的确定。
通过这样的方法，能够根据探测数据得到液体容器尺寸信息和第一分解量、第一分解量，并根据第一分解量、第一分解量和液体容器尺寸信息确定待测液体的基材料分解系数，从而实现了利用双能X射线进行待测液体探测和识别，提高了液体探测的效率。
在一些实施例中，可以预先扫描空的液体容器托盘，获取托盘相关信息并存储。托盘相关信息包括托盘几何信息和托盘材质信息。托盘几何信息包括每个卡槽在扫描图像的两个方向上的位置、大小，以及与容器信息提取有关的几何参数。求解时，结合托盘设计时设定的先验信息进行求解。托盘材质信息求解：用于在计算液体材质信息时剔除托盘对结果的影响。扫描空托盘能够较为准确地抠取液体区域的托盘底面的 材质，托盘的材质信息实际表示为单位厚度的托盘底面的基材料分解系数。当采用两种基材料时，托盘的基材料分解系数包括预定第一基材料分解系数和预定第二基材料分解系数。
通过这样的方法，能够较为准确的得到托盘的几何、材质信息，在液体容器放置于液体容器托盘上的情况下充分考虑到托盘对于探测数据的影响，在维持待测液体稳定的同时，保证运算的准确性，从而进一步提高液体探测的准确度。
在一些实施例中，为获取参数d liquid,i，需要获取液体的几何信息。绝大部分液体的几何信息能够直接由容器的几何信息推导而来，如，若容器几何为圆形，则液体的半径为容器的半径减去容器的壁厚。对于液体液面的提取，在一些实施例中，可以从视角图像数据中提取液面高度。如，当采用双视角的探测方式时，若放置在托盘内的容器瓶身平行于皮带传送方向，则液面可以直接从侧视角图像数据中提取；若容器瓶身垂直于皮带传送方向，则可以从底视角的图像数据中提取液面的弧形边界，结合容器的几何形状确定液面的高度。在另一些实施例中，可以在目标函数求解过程中，将液面高度作为一需要求解的参数，在优化求解中获得液面高度。
通过这样的方法，能够获取液体的几何信息，从而增加目标函数中的已知参量，提高液体探测的可靠性。
在一些实施例中，当获取第一基材料分解系数、第二基材料分解系数后，可以根据第一基材料分解系数、第二基材料分解系数、第一预定特征密度和第二预定特征密度确定待测液体的特征密度，如根据公式：
Figure PCTCN2017118525-appb-000002
确定待测液体的特征密度ρ liquid *，其中，b liquid,1为第一基材料分解系数，b liquid,2为第二基材料分解系数，ρ 1 *为第一预定特征密度，ρ 2 *为第二预定特征密度。通过这样的方法，能够根据第一基材料分解系数、第二基材料分解系数得到待测液体的特征密度。由于特征密度是液体识别的重要指标，因此能够有助于液体识别和危险度判断，实现对于液体的安全探测。
在一些实施例中，当获取第一基材料分解系数、第二基材料分解系数后，可以根据第一基材料分解系数、第二基材料分解系数、第一预定特征密度、第二预定特征密度、第一预定有效原子序数和第二预定有效原子序数确定待测液体的有效原子序数，如根据公式：
Figure PCTCN2017118525-appb-000003
确定待测液体的有效原子序数Zeff liquid，其中，Zeff 1为第一预定有效原子序数，Zeff 2为第二预定有效原子序数，n为预定常数。在一些实施例中，n可以根据经验确定，或根据探测效果进行校正。在一些实施例中，n可以取值3.5。由于有效原子序数是液体识别的重要指标，因此能够有助于液体识别和危险度判断，实现对于液体的安全探测。
在一些实施例中，当确定待测液体的有效原子序数和特征密度后，可以基于预定分类数据确定待测液体的危险等级。在一些实施例中，预定分类数据中可以包括有效原子序数和特征密度与危险等级的对应关系。在一些实施例中，可以利用预定分类器确定待测液体的危险等级，并根据危险等级发出告警信息。通过这样的方法，能够将有效原子序数和特征密度信息转变为具体的危险等级信息并传达给工作人员，便于工作人员做出相应的反应，优化了安检效果。
在一些实施例中，可以采用多种设计方法进行分类器的设计。例如：
(1)最近邻法。对于待分类的每个液体材质数据，观察其某个邻域里液体材质数据库中数据的状态，由其邻域的危险性决定其所属危险等级。
(2)二维区域划分法。液体材质(原子序数和特征密度)数据可以用一个二维坐标系表示。首先对二维坐标系进行归一化，然后，采用基于最小错误率或最小风险的决策策略，将二维区域划分为多个区域，每个区域具有各自的危险等级。
(3)SVM(Support Vector Machine，支持向量机)。将[液体原子序数，液体特征密度，液体危险等级]作为输入进行分类器训练，比较多种核函数的分类效果，选择合适的核函数。
通过上述方法建立液体材质数据库，并不断更新和丰富数据库，从而有利于增强液体违禁品检测能力。在增加了液体材质数据库数据后，再次进行样本训练能够得到更优的分类器。在液体材质数据库建立时，可以为每个加入的数据设置一个维度用以表示其危险性，譬如，对于浓硫酸，危险等级设置为1，从而便于获取直观标识的液体危险度信息。
由于按照某些行业的安检规则，体积小于门限值的液体可以免于危险检测，因此可以根据液体的几何信息估算出液体的体积，若液体的体积小于门限值，则不进行危险等级分类，从而一方面满足了行业的安检规则，避免了对小容量液体的错误告警； 另一方面也减少了设备的运算量，提高了安检效率。
在一些实施例中，针对不同的危险等级可以用不同的方式进行告警，如对于危险等级高的，可以采用紧急报警+画框提示；对于可疑物品，可以采用普通报警+画框提示；对于危险等级低的，可以仅采用画框提示或不提示。在画框提示方面，可以用不同颜色标明危险等级，或者，也可以添加指示危险等级的文字。
通过这样的方法，能够更加直观的向用户传达待测液体的危险度，从而便于工作人员及时发现危险物品并做出相应的操作。
本公开的安检扫描方法的又一些实施例的流程图如图4所示。
在步骤401中，获取探测区域的行包扫描数据。待测物体在传送机构的带动下经过探测区域，其中，液体容器被放置在液体容器托盘上，液体容器托盘在传送机构的带动下经过探测区域。
在步骤402中，判断行包扫描数据中是否存在液体容器托盘标识。若在行包扫描数据中识别出液体容器托盘标识，则确认液体容器托盘进入探测区域，执行步骤405；否则，则认为无需进行液体容器探测，返回执行步骤403。
在步骤403中，根据行包扫描数据判断包中是否存在液体容器。若存在液体容器，则执行步骤404。若不存在液体容器，则返回执行步骤401，继续执行行包探测。在一些实施例中，可以根据扫描图像获取边缘图像；根据边缘图像，基于瓶子的对称性，通过统计扫描窗口内关于扫描窗口的对称轴对称的边缘点确定待选瓶子区域，从而从待选瓶子区域中筛选出瓶子区域。
在步骤404中，发出告警信息以提示工作人员将液体容器从包中取出，并放入液体容器托盘中执行液体检测操作，继而执行步骤401。在一些实施例中，可以通过图像标注瓶子区域的方式提示液体容器的位置和数量。
在步骤405中，判断液体容器托盘的摆放是否符合要求。若符合要求，则执行步骤407；若不符合要求，则执行步骤406。在一些实施例中，可以根据预定标识位置、预定标识姿态判断液体容器托盘的摆放是否符合要求。在一些实施例中，可以通过求解液体容器托盘上定位孔的位置、定位孔间的距离和单侧定位孔中心(或者单侧标记物中线)的斜率判断托盘的摆放是否符合要求。
在步骤406中，发出告警信息，提醒工作人员重新摆放液体容器托盘。
在步骤407中，执行液体检测操作。在一些实施例中，可以通过上文中提到任意一种方式执行液体检测操作。
在步骤408中，确定待测液体的危险等级。在一些实施例中，可以根据待测液体的有效原子序数和特征密度，利用上文中提到的预先设定的分类器进行液体危险等级判断。
在步骤409中，根据危险等级发出对应的告警信息。在一些实施例中，针对不同的危险等级可以用不同的方式进行告警，从而更加直观的向用户传达待测液体的危险度。
通过这样的方法，能够识别行包扫描数据中的液体容器托盘标识，及时切换到液体检测模式，实现了采用单个设备实现行包和液体的检测；能够检测到包中隐藏的液体容器并提示工作人员取出，从而避免了对液体的漏检测，提高了安检的可靠度；通过检验托盘的摆放优化射线方向与液体容器的相对角度，提高液体探测的准确度；采用对双能X探测数据进行分析的方式进行液体材质信息获取，提高了检测效率；能够采用不同形式的告警信息展示待测液体的危险等级，进一步提高安检的可靠度。
本公开的安检扫描装置的一些实施例的示意图如图5所示。行包扫描模块501能够获取探测区域的行包扫描数据。待测物体在传送机构的带动下经过探测区域，其中，液体容器被放置在液体容器托盘上，液体容器托盘在传送机构的带动下经过探测区域。托盘标识识别模块502能够判断行包扫描数据中是否存在液体容器托盘标识。若在行包扫描数据中识别出液体容器托盘标识，则激活液体检测模块503执行液体检测操作；若在行包扫描数据中未识别出液体容器托盘标识，则行包扫描模块501继续进行行包探测。
这样的装置能够识别行包扫描数据中的液体容器托盘标识，及时切换到液体检测模式对探测区域中托盘上承载的液体进行检测，从而实现了采用单个设备实现行包和液体的检测，无需配置单独的液体检测设备，提高了设备的集成度；无需对液体进行单独逐个检测，提高了安检效率。
在一些实施例中，液体容器托盘的两端分别包括液体容器托盘标识，当探测器探测到一端的液体容器托盘标识时，则确定液体容器托盘进入探测区域，执行液体检测操作；当另一端的液体容器托盘标识进入探测区域时，确定液体容器托盘完全进入探测区域，当完成两端的液体容器托盘标识之间区域的液体探测后，液体检测结束，及时切换回行包探测模式。这样的装置能够及时发现完成液体检测，从而及时切换到行包探测模式，进一步提高探测效率。
本公开的安检扫描装置的另一些实施例的示意图如图6所示。行包扫描模块601、 托盘标识识别模块602和液体检测模块603的结构和功能与图5的实施例中相似。安检扫描装置还包括液体容器识别模块604和告警模块605，液体容器识别模块604能够根据行包扫描数据判断包中是否存在液体容器。若存在液体容器，则激活告警模块605发出告警信息以提示工作人员将液体容器从包中取出，并放入液体容器托盘中执行液体检测操作。在一些实施例中，告警模块605可以通过图像标注瓶子区域的方式提示液体容器的位置和数量。若从行包扫描数据中未检测到液体容器，则行包扫描模块501继续进行行包探测。
这样的装置能够及时发现隐藏在包中的液体容器，从而防止对包中液体的漏检查，提高安检的严密性，提高安检效果。
在一些实施例中，液体检测模块603可以通过双能X射线探测器获取待测液体的探测数据；基于预定基材料信息，根据待测液体的探测数据确定待测液体的基材料分解系数，预定基材料信息中包括探测数据与分解量的关联信息，配合射线穿过液体的厚度进行计算，能够得到待测液体的基材料分解系数；根据待测液体的基材料分解系数确定待测液体的有效原子序数和特征密度。由于有效原子序数和特征密度是液体材质的两个重要指标，这样的装置能够有效的对液体进行分类，并进行危险等级鉴定，从而达到液体安全检测的目的。
在一些实施例中，可以设定目标函数，液体检测模块603采用目标函数最优化算法根据分解量和液体容器尺寸信息确定待测液体的基材料分解系数。目标函数可以如上文中提到的公式(1)所示。
这样的装置能够根据探测数据得到液体容器尺寸信息和第一分解量、第一分解量，并根据第一分解量、第一分解量和液体容器尺寸信息确定待测液体的基材料分解系数，从而实现了利用双能X射线进行待测液体探测和识别，提高了液体探测的效率。
在一些实施例中，为获取参数d liquid,i，液体检测模块603需要获取液体的几何信息。绝大部分液体的几何信息能够直接由容器的几何信息推导而来，如，若容器几何为圆形，则液体的半径为容器的半径减去容器的壁厚。对于液体液面的提取，在一些实施例中，可以从视角图像数据中提取液面高度。如，当采用双视角的探测方式时，若放置在托盘内的容器瓶身平行于皮带传送方向，则液面可以直接从侧视角图像数据中提取；若容器瓶身垂直于皮带传送方向，则可以从底视角的图像数据中提取液面的弧形边界，结合容器的几何形状确定液面的高度。在另一些实施例中，可以在目标函数求解过程中，将液面高度作为一需要求解的参数，在优化求解中获得液面高度。
这样的装置能够获取液体的几何信息，从而增加目标函数中的已知参量，提高液体探测的可靠性。
在一些实施例中，由于按照某些行业的安检规则，体积小于门限值的液体可以免于危险检测，液体检测模块603可以根据液体的几何信息计算液体的体积，若液体的体积小于门限值，则无需确定液体的分解系数，也无需进行液体的有效原子序数和特征密度计算，从而进一步减少了设备的运算量，提高了安检效率。
在一些实施例中，当获取第一基材料分解系数、第二基材料分解系数后，可以采用上文中提到的公式(2)(3)运算得到待测液体的特征密度和有效原子序数，从而便于根据这两个参数进行液体危险等级判断，达到液体检测的目的。
本公开的安检扫描装置的又一些实施例的示意图如图7所示。行包扫描模块701、托盘标识识别模块702和液体检测模块703的结构和功能与图6的实施例中相似。安检扫描装置还包括危险等级确定模块704和危险告警705。危险等级确定模块704利用预定分类器确定待测液体的危险等级；危险告警705能够根据危险等级发出告警信息。
这样的装置能够将有效原子序数和特征密度信息转变为具体的危险等级信息并传达给工作人员，便于工作人员做出相应的反应，优化了安检效果。
由于按照某些行业的安检规则，体积小于门限值的液体可以免于危险检测，因此危险等级确定模块704可以根据液体检测模块703获取的液体的几何信息估算出液体的体积，若液体的体积小于门限值，则不进行危险等级分类，从而一方面满足了行业的安检规则，避免了对小容量液体的错误告警；另一方面也减少了设备的运算量，提高了安检效率。
在一些实施例中，针对不同的危险等级，危险告警705可以用不同的方式进行告警，如对于危险等级高的，可以采用紧急报警+画框提示；对于可疑物品，可以采用普通报警+画框提示；对于危险等级低的，可以仅采用画框提示或不提示。在画框提示方面，可以用不同颜色标明危险等级，或者，也可以添加指示危险等级的文字。这样的装置能够更加直观的向用户传达待测液体的危险度，从而便于工作人员及时发现危险物品并做出相应的操作。
本公开的安检扫描装置的再一些实施例的示意图如图8所示。行包扫描模块801、托盘标识识别模块802、液体检测模块803、液体容器识别模块804、告警模块805、危险等级确定模块807和危险告警808的结构和功能与图6、7的实施例中相似。安 检扫描装置还包括托盘摆放验证模块806，与托盘标识识别模块802、液体检测模块803和告警模块805信号连接，能够托盘标识识别模块802获取的液体容器托盘标识判断液体容器托盘的摆放是否符合要求，在一些实施例中，可以根据预定标识位置、预定标识姿态判断液体容器托盘的摆放是否符合要求。在一些实施例中，可以通过求解液体容器托盘上定位孔的位置、定位孔间的距离和单侧定位孔中心(或者单侧标记物中线)的斜率判断托盘的摆放是否符合要求。若摆放符合要求，则激活液体检测模块803执行液体检测；若摆放不符合要求，则激活告警模块805发出告警信息，提醒工作人员重新摆放液体容器托盘。
这样的装置能够识别行包扫描数据中的液体容器托盘标识，及时切换到液体检测模式，实现了采用单个设备实现行包和液体的检测；能够检测到包中隐藏的液体容器并提示工作人员取出，从而避免了对液体的漏检测，提高了安检的可靠度；通过检验托盘的摆放优化射线方向与液体容器的相对角度，提高液体探测的准确度；采用对双能X探测数据进行分析的方式进行液体材质信息获取，提高了检测效率；能够采用不同形式的告警信息展示待测液体的危险等级，进一步提高安检的可靠度。
本公开安检扫描装置的一些实施例的结构示意图如图9所示。安检扫描装置包括存储器901和处理器902。其中：存储器901可以是磁盘、闪存或其它任何非易失性存储介质。存储器用于存储上文中安检扫描方法的对应实施例中的指令。处理器902耦接至存储器901，可以作为一个或多个集成电路来实施，例如微处理器或微控制器。该处理器902用于执行存储器中存储的指令，能够实现采用单个设备实现行包和液体的检测，无需配置单独的液体检测设备，提高了设备的集成度；无需对液体进行逐个检测，提高了安检效率。
在一些实施例中，还可以如图10所示，安检扫描装置1000包括存储器1001和处理器1002。处理器1002通过BUS总线1003耦合至存储器1001。该安检扫描装置1000还可以通过存储接口1004连接至外部存储装置1005以便调用外部数据，还可以通过网络接口1006连接至网络或者另外一台计算机系统(未标出)。此处不再进行详细介绍。
在该实施例中，通过存储器存储数据指令，再通过处理器处理上述指令，能够实现采用单个设备实现行包和液体的检测，无需配置单独的液体检测设备，提高了设备的集成度；无需对液体进行逐个检测，提高了安检效率。
在另一些实施例中，本公开还提出一种计算机可读存储介质，其上存储有计算机 程序指令，该指令被处理器执行时实现安检扫描方法对应实施例中的方法的步骤。本领域内的技术人员应明白，本公开的实施例可提供为方法、装置、或计算机程序产品。因此，本公开可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开可采用在一个或多个其中包含有计算机可用程序代码的计算机可用非瞬时性存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本公开的安检系统的一些实施例的示意图如图9所示。11为传送机构，在图9中，传送机构11沿垂直于纸面的方向运动；12为射线源，能够向待测物体方向发射X射线，射线源为X射线发射器。13为探测器，能够进行射线探测，探测器13为双能X射线探测器。安检系统还包括上文中提到的任意一种安检扫描装置。当确定行包扫描数据中存在液体容器托盘标识时，切换到液体检测模式，执行液体检测操作。在一些实施例中，当液体容器托盘离开探测区域，或完成对托盘中液体容器的检测后，安检系统切换回行包探测模式。
这样的安检系统能够识别行包扫描数据中的液体容器托盘标识，及时切换到液体检测模式对探测区域中托盘上承载的液体进行检测，从而实现了采用单个设备实现行包和液体的检测，无需配置单独的液体检测设备，提高了设备的集成度；无需对液体进行逐个检测，提高了安检效率。另外，这样的设备可以在相关安检系统的基础上进行改进、升级实现，降低了实现成本，便于推广使用。
在一些实施例中，当设备处于行包检测模式时，能够判断包中是否存在液体容器，若在包中发现存在液体容器，则发出告警信息以提示工作人员将液体容器从包中取出，并放入液体容器托盘中执行液体检测操作。
这样的安检系统能够及时发现隐藏在包中的液体容器，从而防止对包中液体的漏检查，提高安检的严密性，提高安检效果。
最后应当说明的是：以上实施例仅用以说明本公开的技术方案而非对其限制；尽管参照较佳实施例对本公开进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本公开的具体实施方式进行修改或者对部分技术特征进行等同替换；而不脱离本公开技术方案的精神，其均应涵盖在本公开请求保护的技术方案范围当中。

Claims (19)

  1. 一种安检扫描方法，包括：
    获取行包扫描数据；
    识别所述行包扫描数据中的液体容器托盘的标识；和
    在所述行包扫描数据中存在所述标识的情况下，执行液体检测操作。
  2. 根据权利要求1所述的方法，还包括：
    识别所述行包扫描数据中的液体容器；
    在确定存在所述液体容器的情况下，发出告警信息以提示将所述液体容器放入所述液体容器托盘中执行液体检测操作。
  3. 根据权利要求1或2所述的方法，其中，所述执行液体检测操作包括：
    通过双能X射线探测器获取待测液体的探测数据；
    根据所述待测液体的探测数据确定所述待测液体的有效原子序数和特征密度。
  4. 根据权利要求3所述的方法，还包括：
    根据所述待测液体的有效原子序数和特征密度，基于预定分类数据确定所述待测液体的危险等级；
    根据所述危险等级发出告警信息。
  5. 根据权利要求4所述的方法，其中，
    在所述液体容器的体积大于预定门限体积的情况下，执行确定所述待测液体的危险等级的操作。
  6. 根据权利要求4所述的方法，其中，
    所述根据所述危险等级发出告警信息包括：根据所述待测液体的危险等级，通过声音、文字、图形或色彩标识中的至少一种方式发出告警。
  7. 根据权利要求3所述的方法，其中，所述确定所述待测液体的有效原子序数和特征密度包括：
    基于预定基材料信息，根据所述待测液体的探测数据确定所述待测液体的基材料分解系数；和
    根据所述待测液体的所述基材料分解系数确定所述待测液体的有效原子序数和特征密度。
  8. 根据权利要求1或2所述的方法，还包括：
    根据所述行包扫描数据中的所述液体容器托盘标识，基于预定标识位置或预定标识姿态中的至少一种判断所述液体容器托盘的摆放是否符合要求；
    在符合要求的情况下执行所述液体检测操作；
    在不符合要求的情况下，发出告警信息以提示重新摆放所述液体容器托盘。
  9. 一种安检扫描装置，包括：
    行包扫描模块，被配置为获取行包扫描数据；
    托盘标识识别模块，被配置为识别所述行包扫描数据中的液体容器托盘的标识；和
    液体检测模块，被配置为在所述行包扫描数据中存在所述液体容器托盘标识的情况下，执行液体检测操作。
  10. 根据权利要求8所述的装置，还包括：
    液体容器识别模块，被配置为识别所述行包扫描数据中的液体容器；和，
    告警模块，被配置为在确定存在所述液体容器的情况下，发出告警信息以提示将所述液体容器放入所述液体容器托盘中执行液体检测操作。
  11. 根据权利要求9或10所述的装置，其中，所述液体检测模块包括：
    探测数据获取单元，被配置为通过双能X射线探测器获取待测液体的探测数据；和，
    液体信息确定单元，被配置为根据所述待测液体的探测数据确定所述待测液体的有效原子序数和特征密度。
  12. 根据权利要求11所述的装置，还包括：
    危险等级确定模块，被配置为根据所述待测液体的有效原子序数和特征密度，基于预定分类数据确定所述待测液体的危险等级；
    危险告警模块，被配置为根据所述危险等级发出告警信息。
  13. 根据权利要求12所述的装置，其中，所述危险等级确定模块包括：
    体积识别单元，被配置为根据所述探测数据获取液体容器的体积，并将所述液体容器的体积与预定门限体积进行比较，在所述液体容器的体积大于预定门限体积的情况下，激活危险等级判断单元；
    所述危险等级判断单元，被配置为根据所述待测液体的有效原子序数和特征密度，基于预定分类数据判断所述待测液体的危险等级。
  14. 根据权利要求12所述的装置，其中，
    所述危险告警模块具体被配置为根据所述待测液体的危险等级，通过声音、文字、图形或色彩标识中的至少一种发出告警。
  15. 根据权利要求11所述的装置，其中，所述液体信息确定单元被配置为：
    基于预定基材料信息，根据所述待测液体的探测数据确定所述待测液体的基材料分解系数；和，
    根据所述待测液体的所述基材料分解系数确定所述待测液体的有效原子序数和特征密度。
  16. 根据权利要求9或10所述的装置，还包括：
    托盘摆放验证模块，被配置为根据所述行包扫描数据中的所述液体容器托盘标识，基于预定标识位置或预定标识姿态中的至少一种判断所述液体容器托盘的摆放是否符合要求；
    在符合要求的情况下，所述液体检测模块执行所述液体检测操作；
    在不符合要求的情况下，激活所述告警模块发出告警信息以提示重新摆放所述液体容器托盘。
  17. 一种安检扫描装置，包括：
    存储器；以及
    耦接至所述存储器的处理器，所述处理器被配置为基于存储在所述存储器的指令执行如权利要求1至8任一项所述的方法。
  18. 一种计算机可读存储介质，其上存储有计算机程序指令，该指令被处理器执行时实现权利要求1至8任意一项所述的方法的步骤。
  19. 一种安检系统，其特征在于，包括：
    传送机构，被配置为带动行包运动；
    射线源和射线探测器，被配置为获取探测数据；和
    权利要求9～17任意一项所述的安检扫描装置。
PCT/CN2017/118525 2016-12-29 2017-12-26 安检扫描方法、装置和系统 Ceased WO2018121504A1 (zh)

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