WO2018121444A1

WO2018121444A1 - Liquid detection method and device and security inspection system

Info

Publication number: WO2018121444A1
Application number: PCT/CN2017/118048
Authority: WO
Inventors: 王强; 廖育华; 吴珊珊; 张金宇; 刘晶晶
Original assignee: 同方威视技术股份有限公司
Priority date: 2016-12-29
Filing date: 2017-12-22
Publication date: 2018-07-05
Also published as: CN108267464B; CN108267464A

Abstract

Provided are a liquid detection method and device and a security inspection system, which relate to the field of security inspection. The liquid detection method comprises: a dual energy X-ray detector acquiring detection data of a liquid to be detected; determining a base material decomposition coefficient of the liquid to be detected on the basis of predetermined base material information and the detection data of the liquid to be detected; and determining an valid atomic number and characteristic density of the liquid to be detected on the basis of the base material decomposition coefficient of the liquid to be detected. By means of the method, a base material decomposition coefficient of a liquid to be detected can be obtained on the basis of predetermined base material information and using ray detection data obtained by a dual energy detector, and a valid atomic number and characteristic density of the liquid to be detected can be obtained on the basis of the base material decomposition coefficient, realizing identification of the liquid. Due to the high efficiency and large detection range of dual energy X-ray detection, identification of liquids in multiple containers can be achieved at the same time, thereby shortening detection time and improving the efficiency of liquid security detection.

Description

液体探测方法和装置及安检***Liquid detection method and device and security inspection system

本公开是以CN申请号为201611239991.4，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。The present disclosure is based on and claims the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit of the benefit.

技术领域Technical field

本公开涉及安检领域，特别是一种液体探测方法和装置及安检***。The present disclosure relates to the field of security inspection, and in particular to a liquid detection method and apparatus and security inspection system.

背景技术Background technique

目前，在地铁、机场等公共场所，经常会遇到乘客携带装有液体的容器，在地铁安检过程中需要对于乘客携带的液体进行单独检查。At present, in public places such as subways and airports, passengers are often encountered carrying containers filled with liquids, and the liquids carried by passengers need to be inspected separately during the subway security inspection.

相关技术中往往采用试喝的方式进行检查，或采用液体仪进行液体检测。液体仪是单独针对液体瓶检测的一种类似CT(Computed Tomography，电子计算机断层扫描)设备原理的小型装置，可以识别出瓶中液体材质属性，然后进行危险等级判断；但是液体仪的扫描空间有限，不能同时对多瓶大容量液体瓶进行检测，降低了安检效率。另外，相关技术中还可以利用CT设备进行检测，但是，CT设备检测效率低，不利于提高安检效率，不适用于拥挤的公共安检场所。In the related art, the test is often carried out by means of a trial drink, or the liquid test is carried out using a liquid meter. The liquid meter is a small device similar to the principle of CT (Computed Tomography) for liquid bottle detection. It can identify the liquid material properties in the bottle and then judge the hazard level. However, the liquid scanner has limited scanning space. It is not possible to test multiple bottles of large-capacity liquid bottles at the same time, which reduces the efficiency of security inspection. In addition, the related art can also use CT equipment for detection, but the CT equipment has low detection efficiency, which is not conducive to improving security inspection efficiency, and is not suitable for crowded public security inspection places.

发明内容Summary of the invention

本公开的一个目的在于提高液体安全检测的效率。It is an object of the present disclosure to improve the efficiency of liquid safety testing.

根据本公开的一个或多个实施例的一个方面，提出一种液体探测方法，包括通过双能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；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。According to an aspect of one or more embodiments of the present disclosure, a liquid detecting method is provided, comprising: acquiring detection data of a liquid to be tested by a dual energy X-ray detector; and detecting data according to the liquid to be tested based on predetermined base material information Determining a base material decomposition coefficient of the liquid to be tested; and determining an effective atomic number and a feature density of the liquid to be tested according to a base material decomposition coefficient of the liquid to be tested.

可选地，确定待测液体的基材料分解系数包括：根据探测数据获取液体容器尺寸信息；基于预定基材料信息，根据待测液体的双能探测数据确定第一分解量和第二分解量；和，根据第一分解量、第二分解量和液体容器尺寸信息确定第一基材料的分解系数和第二基材料的分解系数。Optionally, determining a base material decomposition coefficient of the liquid to be tested includes: acquiring liquid container size information according to the detection data; determining, according to the predetermined base material information, the first decomposition amount and the second decomposition amount according to the dual energy detection data of the liquid to be tested; And determining a decomposition coefficient of the first base material and a decomposition coefficient of the second base material according to the first decomposition amount, the second decomposition amount, and the liquid container size information.

可选地，第一基材料的分解系数和第二基材料的分解系数为基于目标函数最优化算法确定；根据第一基材料的分解系数和第二基材料的分解系数确定第一基材料的特征密度和有效原子序数，以及第二基材料的特征密度和有效原子序数；待测液体的特征密度为根据第一基材料的分解系数和特征密度、第二基材料的分解系数和特征密度确定；待测液体的有效原子序数为根据第一基材料的分解系数、特征密度和有效原子序数，以及第二基材料的分解系数、特征密度和有效原子序数确定。Optionally, the decomposition coefficient of the first base material and the decomposition coefficient of the second base material are determined based on an objective function optimization algorithm; determining the first base material according to the decomposition coefficient of the first base material and the decomposition coefficient of the second base material Characteristic density and effective atomic number, and characteristic density and effective atomic number of the second base material; the characteristic density of the liquid to be tested is determined according to the decomposition coefficient and the characteristic density of the first base material, the decomposition coefficient of the second base material, and the characteristic density The effective atomic number of the liquid to be tested is determined according to the decomposition coefficient, the characteristic density and the effective atomic number of the first base material, and the decomposition coefficient, the characteristic density and the effective atomic number of the second base material.

可选地，根据下面的目标函数公式进行最优化计算，确定目标函数f最小时的第一基材料的分解系数b _liquid,1和第二基材料的分解系数b _liquid,2， Alternatively, according to the following objective function optimization calculation formula to determine the minimum objective function f of the first base material decomposition coefficients b _{liquid, 1} and the second base material decomposition coefficients b _{liquid, 2,}

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穿过的放置液体容器的托盘厚度，d _container,i为射线i穿过的液体容器厚度，d _liquid,i为射线i穿过的液体厚度，b _tray,1为液体容器托盘的预定第一基材料的分解系数，b _tray,2为液体容器托盘的预定第二基材料的分解系数，b _container,1为液体容器的第一基材料的分解系数，b _container,2为液体容器的第二基材料的分解系数，i为射线标识，i为自然数且1≤i≤N，N为穿过液体容器的投影线总数量。 Wherein 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 acquired according to the detection data of the ray i; d _tray,i is the placement liquid through which the ray i passes The tray thickness of the _container , d _{container, i} is the thickness of the liquid container through which the ray i passes, d _{liquid, i} is the thickness of the liquid through which the ray i passes, b _{tray, 1} is the decomposition coefficient of the predetermined first base material of the liquid container tray, b _{tray, 2} is the decomposition coefficient of the predetermined second base material of the liquid container tray, b _{container, 1} is the decomposition coefficient of the first base material of the liquid container, b _{container, 2} is the decomposition coefficient of the second base material of the liquid container, i is the ray mark, i is a natural number and 1 ≤ i ≤ N, where N is the total number of projection lines passing through the liquid container.

可选地，获取液体容器尺寸信息包括：根据放置液体容器的托盘卡槽位置获取容器区域；根据探测数据基于图像分割获取容器轮廓；基于预存容器形状数据判断容器的几何形状；和根据几何形状和探测数据提取液体容器尺寸信息，液体容器尺寸信息包括半径、边长、壁厚或瓶身有效数据区间中的一种或多种。Optionally, obtaining the liquid container size information comprises: obtaining the container area according to the tray card slot position of the liquid container; obtaining the container outline based on the image segmentation according to the image data; determining the container geometry based on the pre-stored container shape data; and according to the geometric shape and The detection data extracts the liquid container size information, and the liquid container size information includes one or more of a radius, a side length, a wall thickness, or a valid data section of the bottle body.

可选地，液体探测方法还包括：检测液体容器托盘标识；在检测到液体容器托盘标识的情况下，通过双能X射线探测器获取待测液体的探测数据；否则，执行行包探测。Optionally, the liquid detecting method further comprises: detecting the liquid container tray identifier; and acquiring the detection data of the liquid to be tested by the dual energy X-ray detector in the case that the liquid container tray identifier is detected; otherwise, performing the line packet detection.

可选地，液体探测方法还包括：根据待测液体的有效原子序数和特征密度确定待测液体的危险等级；在待测液体为危险液体的情况下，发出告警信息。Optionally, the liquid detecting method further comprises: determining a hazard level of the liquid to be tested according to an effective atomic number and a characteristic density of the liquid to be tested; and issuing an alarm information when the liquid to be tested is a dangerous liquid.

通过这样的方法，能够利用双能X射线探测数据，基于预定基材料信息得到待测液体的基材料分解系数，并根据基材料分解系数得到待测液体的有效原子序数和特征密度，从而实现液体的识别。由于X射线探测的效率高，且探测范围大，因此能够同时实现多个容器中液体的识别，缩短了探测时间，提高了液体安全检测的效率。By such a method, the dual-energy X-ray detection data can be utilized, the base material decomposition coefficient of the liquid to be tested is obtained based on the predetermined base material information, and the effective atomic number and the feature density of the liquid to be tested are obtained according to the base material decomposition coefficient, thereby realizing the liquid. Identification. Due to the high efficiency of X-ray detection and the large detection range, it is possible to simultaneously recognize the liquid in a plurality of containers, shorten the detection time, and improve the efficiency of liquid safety detection.

根据本公开的一个或多个实施例的另一个方面，提出一种液体探测装置，包括：射线探测模块，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；基材料分解系数获取模块，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；液体识别模块，被配置为根据待测液体的基材料分解系数确定待测液体的特征密度和有效原子序数。According to another aspect of one or more embodiments of the present disclosure, a liquid detecting apparatus is provided, comprising: a radiation detecting module configured to acquire detection data of a liquid to be tested by a dual energy X-ray detector; a base material decomposition coefficient The acquiring module 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; the liquid identification module is configured to determine the liquid to be tested according to the base material decomposition coefficient of the liquid to be tested Feature density and effective atomic number.

可选地，基材料分解系数获取模块包括：容器信息获取单元，被配置为根据探测数据获取液体容器尺寸信息；信息匹配单元，被配置为基于预定基材料信息，根据待测液体的双能探测数据确定第一分解量和第二分解量；和，分解系数确定单元，被配置为根据第一分解量、第二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。Optionally, the base material decomposition coefficient acquisition module includes: a container information acquisition unit configured to acquire liquid container size information according to the detection data; and an information matching unit configured to perform dual energy detection according to the liquid to be tested based on the predetermined base material information The data determines a first decomposition amount and a second decomposition amount; and, the decomposition coefficient determination unit is configured to determine a base material decomposition coefficient of the liquid to be tested according to the first decomposition amount, the second decomposition amount, and the liquid container size information.

可选地，分解系数确定单元被配置为基于目标函数最优化算法确定待测液体的第一基材料的分解系数和第二基材料的分解系数；液体识别模块包括：特征密度确定单元，被配置为根据第一基材料的分解系数和特征密度、第二基材料的分解系数和特征密度确定待测液体的特征密度；有效原子序数确定单元，被配置为根据第一基材料的分解系数、特征密度和有效原子序数，以及第二基材料的分解系数、特征密度和有效原子序数确定待测液体的有效原子序数。Optionally, the decomposition coefficient determining unit is configured to determine a decomposition coefficient of the first base material of the liquid to be tested and a decomposition coefficient of the second base material based on the objective function optimization algorithm; the liquid identification module includes: a feature density determination unit configured Determining a characteristic density of the liquid to be tested according to a decomposition coefficient and a characteristic density of the first base material, a decomposition coefficient of the second base material, and a feature density; the effective atomic number determining unit is configured to be based on a decomposition coefficient and a characteristic of the first base material The density and the effective atomic number, as well as the decomposition coefficient, the characteristic density and the effective atomic number of the second base material, determine the effective atomic number of the liquid to be tested.

可选地，分解系数确定单元被配置为根据下面的目标函数公式进行最优化计算，确定目标函数f最小时的第一基材料的分解系数b _liquid,1和第二基材料的分解系数b _liquid,2， Alternatively, decomposition coefficients determining unit is configured to perform optimization calculation formula according to the following objective function, the objective function f is determined minimum first base material decomposition coefficients b _{liquid, 1} and the second base material decomposition coefficients b _{liquid , 2} ,

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穿过的放置液体容器的托盘厚度，d _container,i为射线i穿过的液体容器厚度，d _liquid,i为射线i穿过的液体厚度，b _tray,1为液体容器托盘的预定第一基材料的分解系数，b _tray,2为液体容器托盘的预定第二基材料的分解系数，b _container,1为液体容器的第一基材料的分解系数，b _container,2为液体容器的第二基材料的分解系数，i为射线标识，i为自然数且1≤i≤N，N为穿过容器的投影线总数量。 Wherein 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 acquired according to the detection data of the ray i; d _tray,i is the placement liquid through which the ray i passes The tray thickness of the _container , d _{container, i} is the thickness of the liquid container through which the ray i passes, d _{liquid, i} is the thickness of the liquid through which the ray i passes, b _{tray, 1} is the decomposition coefficient of the predetermined first base material of the liquid container tray, b _{tray, 2} is the decomposition coefficient of the predetermined second base material of the liquid container tray, b _{container, 1} is the decomposition coefficient of the first base material of the liquid container, b _{container, 2} is the decomposition coefficient of the second base material of the liquid container, i is the ray mark, i is a natural number and 1 ≤ i ≤ N, where N is the total number of projection lines passing through the container.

可选地，容器信息获取单元被配置为：根据放置液体容器的托盘卡槽位置获取容器区域；根据探测数据基于图像分割获取容器轮廓；基于预存容器形状数据判断容器的几何形状；和根据几何形状和探测数据提取液体容器尺寸信息，液体容器尺寸信息包括半径、边长、壁厚或瓶身有效数据区间中的一种或多种。Optionally, the container information acquiring unit is configured to: acquire a container area according to a tray card slot position where the liquid container is placed; acquire a container outline based on the image segmentation according to the image data; determine the geometry of the container based on the pre-stored container shape data; and according to the geometric shape And detecting data to extract liquid container size information, the liquid container size information including one or more of a radius, a side length, a wall thickness, or a valid data section of the bottle.

可选地，液体探测装置还包括：托盘识别模块，被配置为检测液体容器托盘标识；在检测到液体容器托盘标识的情况下，激活射线探测模块通过双能X射线探测器获取待测液体的探测数据。Optionally, the liquid detecting device further comprises: a tray identifying module configured to detect the liquid container tray identifier; and in the case detecting the liquid container tray identifier, the activated ray detecting module acquires the liquid to be tested through the dual energy X-ray detector Probe data.

可选地，液体探测装置还包括：告警模块，被配置为根据待测液体的有效原子序数和特征密度确定待测液体的危险等级；在待测液体为危险液体的情况下，发出告警信息。Optionally, the liquid detecting device further includes: an alarm module configured to determine a hazard level of the liquid to be tested according to an effective atomic number and a characteristic density of the liquid to be tested; and to issue an alarm information when the liquid to be tested is a dangerous liquid.

根据本公开的一个或多个实施例的又一个方面，提出一种液体探测装置，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上文中任意一种液体探测方法。According to still another aspect of one or more embodiments of the present disclosure, a liquid detecting apparatus is provided, comprising: a memory; and a processor coupled to the memory, the processor being configured to perform any of the above based on an instruction stored in the memory A liquid detection method.

这样的装置能够利用双能X射线探测数据，基于预定基材料信息得到待测液体的基材料分解系数，并根据基材料分解系数得到待测液体的有效原子序数和特征密度，从而实现液体的识别。由于双能X射线探测的效率高，且探测范围大，因此能够同时实现多个容器中液体的识别，缩短了探测时间，提高了液体安全检测的效率。Such a device can utilize dual-energy X-ray detection data, obtain a base material decomposition coefficient of the liquid to be tested based on predetermined base material information, and obtain an effective atomic number and a feature density of the liquid to be tested according to the base material decomposition coefficient, thereby realizing liquid identification. . Due to the high efficiency of the dual-energy X-ray detection and the large detection range, the liquid identification in a plurality of containers can be simultaneously realized, the detection time is shortened, and the efficiency of liquid safety detection is improved.

根据本公开的一个或多个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液体探测方法的步骤。According to still another aspect of one or more embodiments of the present disclosure, a computer readable storage medium having stored thereon computer program instructions for performing the steps of any one of the above liquid detection methods when executed by a processor .

这样的计算机可读存储介质通过执行其上的指令，能够利用双能X射线探测数据，基于预定基材料信息得到待测液体的基材料分解系数，并根据基材料分解系数得到待测液体的有效原子序数和特征密度，从而实现液体的识别。由于双能X射线探测的效率高，且探测范围大，因此能够同时实现多个容器中液体的识别，缩短了探测时间，提高了液体安全检测的效率。Such a computer readable storage medium can use the dual energy X-ray detection data to obtain the base material decomposition coefficient of the liquid to be tested based on the predetermined base material information, and obtain the effective liquid to be tested according to the base material decomposition coefficient. Atomic number and feature density to achieve liquid identification. Due to the high efficiency of the dual-energy X-ray detection and the large detection range, the liquid identification in a plurality of containers can be simultaneously realized, the detection time is shortened, and the efficiency of liquid safety detection is improved.

另外，根据本公开的一个方面，提出一种安检***，包括：传送机构，被配置为带动待测物体运动；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液体探测装置。In addition, according to an aspect of the present disclosure, a security system is provided, comprising: a transport mechanism configured to drive motion of an object to be tested; a radiation source and a radiation detector configured to acquire probe data; and, as mentioned above Any liquid detecting device.

这样的安检***能够在传送机构传送过程中利用双能射线探测数据获取待测液体的有效原子序数和特征密度，实现液体的识别，从而能够在物体行进过程中实现多个容器中液体的识别，缩短了探测时间，提高了液体安全检测的效率。Such a security inspection system can utilize the dual-energy ray detection data to obtain the effective atomic number and feature density of the liquid to be tested during the transmission process of the transport mechanism, thereby realizing the identification of the liquid, thereby enabling the identification of the liquid in the plurality of containers during the traveling of the object. Reduced detection time and improved efficiency of liquid safety testing.

附图说明DRAWINGS

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：The drawings described herein are provided to provide a further understanding of the present disclosure, which is a part of the present disclosure, and the description of the present disclosure and the description thereof are not intended to limit the disclosure. In the drawing:

图1为本公开的液体探测方法的一些实施例的流程图。1 is a flow chart of some embodiments of a liquid detection method of the present disclosure.

图2为本公开的液体探测方法中确定待测液体的基材料分解系数的一些实施例的流程图。2 is a flow chart of some embodiments of determining a base material decomposition coefficient of a liquid to be tested in the liquid detection method of the present disclosure.

图3为本公开的液体探测方法中的液体容器托盘的一些实施例的示意图。3 is a schematic illustration of some embodiments of a liquid container tray in the liquid detection method of the present disclosure.

图4为本公开的液体探测方法中确定液体容器尺寸信息的一些实施例的流程图。4 is a flow chart of some embodiments of determining liquid container size information in a liquid detection method of the present disclosure.

图5为本公开的液体探测方法的另一些实施例的流程图。Figure 5 is a flow diagram of further embodiments of the liquid detection method of the present disclosure.

图6为本公开的液体探测装置的一些实施例的示意图。Figure 6 is a schematic illustration of some embodiments of a liquid detecting device of the present disclosure.

图7为本公开的液体探测装置中基材料分解系数获取模块的一些实施例的示意图。7 is a schematic diagram of some embodiments of a base material decomposition coefficient acquisition module in the liquid detection device of the present disclosure.

图8为本公开的液体探测装置中液体识别模块的一些实施例的示意图。Figure 8 is a schematic illustration of some embodiments of a liquid identification module in a liquid detection device of the present disclosure.

图9为本公开的液体探测装置的另一些实施例的示意图。Figure 9 is a schematic illustration of further embodiments of the liquid detecting device of the present disclosure.

图10为本公开的液体探测装置的又一些实施例的示意图。Figure 10 is a schematic illustration of still further embodiments of the liquid detecting device of the present disclosure.

图11为本公开的液体探测装置的再一些实施例的示意图。Figure 11 is a schematic illustration of still further embodiments of the liquid detecting device of the present disclosure.

图12为本公开的安检***的一些实施例的示意图。12 is a schematic diagram of some embodiments of a security system of the present disclosure.

具体实施方式detailed description

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。The technical solutions of the present disclosure will be further described in detail below through the accompanying drawings and embodiments.

本公开的液体探测方法的一些实施例的流程图如图1所示。A flow chart of some embodiments of the liquid detection method of the present disclosure is shown in FIG.

在步骤101中，通过双能X射线探测器获取待测液体的探测数据。在一些实施例中，采用X射线源配合双能X射线探测器对待测液体进行探测，分别获取低能探测数据和高能探测数据。In step 101, the detection data of the liquid to be tested is acquired by a dual energy X-ray detector. In some embodiments, the X-ray source is used in conjunction with the dual energy X-ray detector to detect the liquid to be detected, and the low energy detection data and the high energy detection data are respectively obtained.

在步骤102中，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。在一些实施例中，预定基材料信息中包括探测数据与分解量的对应关系，根据待测液体的探测数据能够得到分解量，配合射线穿过液体的厚度能够得到待测液体的基材料分解系数。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。In step 102, based on the predetermined base material information, the base material decomposition coefficient of the liquid to be tested is determined according to the detected data of the liquid to be tested. In some embodiments, the predetermined base material information includes a correspondence relationship between the detection data and the decomposition amount, and the decomposition amount can be obtained according to the detection data of the liquid to be tested, and the base material decomposition coefficient of the liquid to be tested can be obtained by matching the thickness of the radiation through the liquid. . In some embodiments, a base material coefficient table may be pre-established, and the base material coefficient table stores predetermined base material information.

在步骤103中，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，根据待测液体的有效原子序数和特征密度可以确定待测液体的种类，进而判断待测液体是否是危险物品；在另一些实施例中，可以直接根据待测液体的有效原子序数和特征密度确定待测液体是否具有危险性。In step 103, the effective atomic number and characteristic density of the liquid to be tested are determined according to the base material decomposition coefficient of the liquid to be tested. In some embodiments, the type of liquid to be tested can be determined according to the effective atomic number and characteristic density of the liquid to be tested, thereby determining whether the liquid to be tested is a dangerous item; in other embodiments, it can be directly determined according to the effective liquid to be tested. The atomic number and characteristic density determine whether the liquid to be tested is dangerous.

通过这样的方法，能够利用双能X射线探测器的探测数据，基于预定基材料信息得到待测液体的基材料分解系数，并根据基材料分解系数得到待测液体的有效原子序数和特征密度，从而实现液体的识别。由于双能X射线探测的效率高，且探测范围大，因此能够同时实现多个容器中液体的识别，缩短了探测时间，提高了液体安全检测的效率。By such a method, the detection data of the dual-energy X-ray detector can be utilized to obtain the base material decomposition coefficient of the liquid to be tested based on the predetermined base material information, and the effective atomic number and the feature density of the liquid to be tested are obtained according to the decomposition coefficient of the base material. Thereby achieving the identification of the liquid. Due to the high efficiency of the dual-energy X-ray detection and the large detection range, the liquid identification in a plurality of containers can be simultaneously realized, the detection time is shortened, and the efficiency of liquid safety detection is improved.

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***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。In some embodiments, predetermined base material information may be pre-generated and stored to facilitate matching calls. In some embodiments, 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. Base material, virtual building base material coefficient table. In some embodiments, 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. In some embodiments, 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.

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。Through such a method, 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.

本公开的液体探测方法中确定待测液体的基材料分解系数的一些实施例的流程图如图2所示。A flow chart of some embodiments of determining the base material decomposition coefficient of the liquid to be tested in the liquid detection method of the present disclosure is shown in FIG.

在步骤201中，根据探测数据获取液体容器尺寸信息。在一些实施例中，可以根据探测数据获取扫描图像，进一步根据扫描图像识别容器区域，计算容器的尺寸信息。在一些实施例中，若液体容器的截面为圆形，则液体容器尺寸信息包括半径、壁厚、瓶身有效数据区间中的一个或多个；若液体容器的截面为方形，则液体容器尺寸信息包括边长、壁厚、瓶身有效数据区间中的一个或多个。In step 201, liquid container size information is acquired based on the probe data. In some embodiments, the scanned image may be acquired based on the detected data, and the container area is further identified based on the scanned image to calculate the size information of the container. In some embodiments, if the liquid container has a circular cross section, the liquid container size information includes one or more of a radius, a wall thickness, and a valid data section of the bottle; and if the cross section of the liquid container is a square, the size of the liquid container The information includes one or more of the side length, the wall thickness, and the effective data interval of the bottle.

在步骤202中，基于预定基材料信息，根据待测液体的双能探测数据确定第一分解量和第二分解量。将高能探测数据、低能探测数据分别与预定基材料信息中的关联信息相匹配，获取与相匹配的第一分解量和第二分解量。In step 202, based on the predetermined base material information, the first decomposition amount and the second decomposition amount are determined according to the dual energy detection data of the liquid to be tested. The high-energy detection data and the low-energy detection data are respectively matched with the associated information in the predetermined base material information, and the first decomposition amount and the second decomposition amount matched are matched.

在步骤203中，根据第一分解量、第二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。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获取待测液体的基材料分解系数。如，设定目标函数公式为：In step 203, a base material decomposition coefficient of the liquid to be tested is determined according to the first decomposition amount, the second decomposition amount, and the liquid container size information. In some embodiments, the objective function can be set, and the target function optimization algorithm is used to obtain the base material decomposition coefficient of the liquid to be tested. For example, set the objective function formula to:

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 _container,i为射线i穿过的液体容器的厚度，d _liquid,i为射线i穿过的液体厚度，b _container,1为液体容器的第一基材料的分解系数，b _container,2液体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LOR总数量；获取目标函数f最小时的第一基材料的分解系数b _liquid,1和第二基材料的分解系数b _liquid,2，从而实现待测液体的基材料分解系数的确定。 Wherein, B _i,1 is a first decomposition amount obtained according to the detection data of the ray i; B _{i, 2} is a second decomposition amount obtained according to the detection data of the ray i; d _{container, i} is a liquid container through which the ray i passes The thickness, d _{liquid, i} is the thickness of the liquid through which the ray i passes, b _{container, 1} is the decomposition coefficient of the first base material of the liquid container, b _container, the second base material decomposition coefficient of the liquid container, i is the ray identification , i is a natural number and 1≤i≤N, N is the total number of LOR; obtaining a first base material, the minimum objective function f decomposition coefficients b _{liquid, 1} and the second base material decomposition coefficients b _{liquid, 2,} in order to achieve Determination of the decomposition coefficient of the base material of the liquid to be tested.

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、第二分解量，并根据第一分解量、第二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。By such a method, the liquid container size information and the first decomposition amount and the second decomposition amount can be obtained according to the detection data, and the base material decomposition coefficient of the liquid to be tested is determined according to the first decomposition amount, the second 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.

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。 In some embodiments, to obtain 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. For liquid level extraction, in some embodiments, the liquid level can be extracted from the perspective image data. For example, when the double-view detection mode is adopted, if the container body placed in the tray is parallel to the belt conveying direction, 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. In other embodiments, 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.

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。By such a method, geometric information of the liquid can be acquired, thereby increasing the known parameters in the objective function and improving the reliability of the liquid detection.

在一些实施例中，当获取第一基材料的分解系数、第二基材料的分解系数后，可以根据第一基材料的分解系数、第二基材料的分解系数、第一基材料的特征密度和第二基材料的特征密度确定待测液体的特征密度，其中，如根据公式：In some embodiments, after the decomposition coefficient of the first base material and the decomposition coefficient of the second base material are obtained, the decomposition coefficient of the first base material, the decomposition coefficient of the second base material, and the characteristic density of the first base material may be used. And a characteristic density of the second base material determines a characteristic density of the liquid to be tested, wherein, according to the formula:

确定待测液体的特征密度ρ _liquid ^*，其中，b _liquid,1为第一基材料的分解系数，b _liquid,2为第二基材料的分解系数，ρ ₁ ^*为第一基材料的特征密度，ρ ₂ ^*为第二基材料的特征密度。通过这样的方法，能够根据第一基材料的分解系数、第二基材料的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。 Determining the characteristic density ρ _liquid ^{* of} the liquid to be tested, wherein b _{liquid, 1} is a decomposition coefficient of the first base material, b _{liquid, 2} is a decomposition coefficient of the second base material, and ρ ₁ ^* is a characteristic density of the first base material , ρ ₂ ^* is the characteristic density of the second base material. By such a method, the characteristic density of the liquid to be tested can be obtained from the decomposition coefficient of the first base material and the decomposition coefficient of the second base material. 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.

在一些实施例中，当获取第一基材料的分解系数、第二基材料的分解系数后，可以根据第一基材料的分解系数、第二基材料的分解系数、第一基材料的特征密度、第二基材料的特征密度、第一基材料的有效原子序数和第二基材料的有效原子序数确定待测液体的有效原子序数，如根据公式：In some embodiments, after the decomposition coefficient of the first base material and the decomposition coefficient of the second base material are obtained, the decomposition coefficient of the first base material, the decomposition coefficient of the second base material, and the characteristic density of the first base material may be used. The characteristic density of the second base material, the effective atomic number of the first base material, and the effective atomic number of the second base material determine the effective atomic number of the liquid to be tested, as according to the formula:

确定待测液体的有效原子序数Zeff _liquid，其中，Zeff ₁为第一基材料的有效原子序数，Zeff ₂为第二基材料的有效原子序数，n为预先配置的常量。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。 Determining the effective atomic number Zeff _{liquid of the liquid to} be tested, wherein Zeff ₁ is the effective atomic number of the first base material, Zeff ₂ is the effective atomic number of the second base material, and n is a pre-configured constant. In some embodiments, n can be determined empirically or based on the detection effect. In some embodiments, n can take a value of 3.5.

在一些实施例中，液体容器可以放置于液体容器托盘中，液体容器托盘放置于安检***的传送机构上，随着托盘进入探测区域，从而能够固定液体容器的位置，便于进行探测。在一些实施例中，托盘以预定位置放置于探测区域，从而能够优化射线方向与液体容器的相对角度，提高液体容器尺寸信息确定的准确度，从而提高液体探测的准确度。In some embodiments, the liquid container can be placed in a liquid container tray that is placed on the transport mechanism of the security system, and as the tray enters the detection area, the position of the liquid container can be fixed for easy detection. In some embodiments, the tray is placed in the detection area at a predetermined position so that the relative angle of the ray direction to the liquid container can be optimized, and the accuracy of the liquid container size information determination is improved, thereby improving the accuracy of liquid detection.

本公开的液体探测方法中的液体容器托盘的一些实施例的示意图如图3所示。1为托盘标识，安检***可以通过识别托盘标识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，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，可以利用原子序数进行标记物的分割，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，在重新摆放完成后再次进行检测。通过这样的方法，能够进一步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。A schematic of some embodiments of a liquid container tray in the liquid detection method of the present disclosure is shown in FIG. 1 is the tray identification, and the security inspection system can determine the liquid container tray to enter the detection area by identifying the tray identification 1 to start liquid detection. In some embodiments, the 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 hollows (ie, positioning holes), each having a different hollow size. At the same time, the distance between the hollows can be different. When the tray is recognized, the atomic number can be used to divide the marker and extract the region of the marker. After the metal marker region is extracted, 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 after the re-arrangement is completed. By such a method, the relative angle of the ray direction to the liquid container can be further optimized, and the accuracy of liquid detection can be improved.

在一些实施例中，如图3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***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***在液体探测与行包探测两种模式之间进行切换。在一些实施例中，安检***的常驻状态可以是行包探测状态，行包探测状态指的是对与探测器相对运动的普通的包、行李进行探测的状态，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。In some embodiments, as shown in FIG. 3, 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. In some embodiments, the resident state of the security system may be a packet detection state, and the packet detection state refers to a state in which a common package and baggage that are relatively moved with the detector are detected, and when the liquid container tray is determined to enter the detection In the area, switch to the liquid detection state; when it is determined that the liquid container tray leaves the detection area, switch back to the line detection state.

相关的CT液体探测方式需要配置体积较大的CT仪器，并不适用于空间有限的公共安检场所，使用也较为复杂。通过本公开上述实施例中的方法，能够实现采用单个安检***进行普通行包探测和液体探测，减小对安检***所占空间的要求，有利于部署实施。The related CT liquid detection method requires a large-volume CT instrument, which is not suitable for public security inspection sites with limited space, and is also complicated to use. Through the method in the above embodiments of the present disclosure, it is possible to implement common line packet detection and liquid detection by using a single security inspection system, thereby reducing the requirement for the space occupied by the security inspection system, and facilitating deployment and implementation.

在一些实施例中，如图3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在托盘中被连续探测，提高液体探测效率。In some embodiments, as shown in FIG. 3, 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, and the bottom of the liquid container faces the tray base surface 2. Direction, the top is opposite to the base surface 2 in the opposite direction. In some embodiments, a single liquid container tray includes a plurality of card slots 4 to enable continuous detection of multiple liquid containers in the tray, improving liquid detection efficiency.

在一些实施例中，如图3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。In some embodiments, as shown in FIG. 3, 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.

由于将液体容器放置于液体容器托盘中，因此探测数据受到液体容器托盘的影响，在设置和求解目标函数时需要考虑到液体容器托盘的影响。如，设置目标函数为：Since the liquid container is placed in the liquid container tray, the detection data is affected by the liquid container tray, and the influence of the liquid container tray needs to be taken into consideration when setting and solving the objective function. For example, set the objective function to:

其中，d _tray,i为射线i穿过的放置液体容器的托盘的厚度，b _tray,1为液体容器托盘的预定第一基材料的分解系数，b _tray,2为液体容器托盘的预定第二基材料的分解系数。通过这样的方法，能够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。 Where d _{tray, i} is the thickness of the tray on which the ray i passes to place the liquid container, b _{tray, 1} is the decomposition coefficient of the predetermined first base material of the liquid container tray, b _{tray, 2} is the predetermined second of the liquid container tray The decomposition factor of the base material. By such a method, the influence of the tray on the detected data can be fully considered in the case where the liquid container is placed on the liquid container tray, and the accuracy of the calculation is ensured while maintaining the stability of the liquid to be tested, thereby further improving the accuracy of the liquid detection. degree.

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。托盘材质信息的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部3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的分解系数和预定第二基材料的分解系数。In some embodiments, 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. When solving, combine the a priori information set in the pallet design to solve. The solution of the pallet material information is used to eliminate the effect of the pallet on the results when calculating the 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 3 of the tray of unit thickness. When two base materials are employed, the base material decomposition coefficient of the tray includes a decomposition coefficient of the predetermined first base material and a decomposition coefficient of the predetermined second base material.

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。Through such a method, 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.

本公开的液体探测方法中确定液体容器尺寸信息的一些实施例的流程图如图4所示。A flow chart of some embodiments for determining liquid container size information in the liquid detection method of the present disclosure is shown in FIG.

在步骤401中，根据液体容器托盘卡槽位置获取容器区域。在一些实施例中，可以判断托盘的每个卡槽内是否放置有容器，当卡槽存在容器时，初步获取容器所在的区域范围。在一些实施例中，可将当前扫描的图像数据与空托盘图像数据相比较，若差异较大，则说明卡槽内有物体，并将物体的区域范围划分出来。在一些实施例中，可以设定阈值、采用阈值分割的方式将物体分割出来。阈值可以是固定的某个经验值，也可以动态局部获取。In step 401, the container area is obtained based on the position of the liquid container tray slot. In some embodiments, it may be determined whether a container is placed in each of the slots of the tray, and when the container is present in the card slot, the area of the area in which the container is located is initially obtained. In some embodiments, the currently scanned image data can be compared with the empty tray image data. If the difference is large, the object is inside the card slot and the area of the object is divided. In some embodiments, the threshold may be set and the object segmented by means of threshold segmentation. The threshold can be a fixed empirical value or can be obtained locally dynamically.

在步骤402中，根据探测数据基于图像分割获取容器轮廓。在一些实施例中，可以对扫描图像数据进行整体阈值分割，或者利用容器边界的连续性，或者两者结合，完整、准确地提取容器外轮廓。In step 402, a container outline is acquired based on the image segmentation based on the detected data. In some embodiments, the scanned image data may be subjected to an overall threshold segmentation, or the continuity of the container boundaries, or a combination of both, to completely and accurately extract the outer contour of the container.

在步骤403中，基于预存容器形状数据判断容器的几何形状。在一些实施例中，可以提取容器底部特征、容器瓶身截面特征进行几何判断。如，预先采集多个典型几何形状的容器，提取底部特征和瓶身截面特征，设计合适的分类器进行几何形状分类，根据匹配结果确定容器的几何形状。In step 403, the geometry of the container is determined based on the pre-stored container shape data. In some embodiments, the bottom feature of the container, the cross-sectional characteristics of the container body can be extracted for geometric determination. For example, pre-collecting a plurality of containers of typical geometry, extracting bottom features and bottle cross-section features, designing a suitable classifier for geometric classification, and determining the geometry of the container based on the matching results.

在步骤404中，根据几何形状和探测数据提取液体容器尺寸信息。在一些实施例中，可以在获取容器几何形状后，从扫描图像数据上提取几何相关的信息。如，对于截面是圆形的容器，提取半径、壁厚和瓶身有效数据区间；对于截面是方形的容器，提取左右边长、壁厚和瓶身有效数据区间。In step 404, liquid container size information is extracted based on the geometry and the probe data. In some embodiments, geometrically relevant information may be extracted from the scanned image data after the container geometry is acquired. For example, for a container whose cross section is circular, the radius, wall thickness and effective data interval of the bottle body are extracted; for the container whose cross section is square, the left and right side lengths, the wall thickness and the effective data interval of the bottle body are extracted.

通过这样的方法，能够根据探测数据获取液体容器尺寸信息，从而提高获取的液体的基材料分解系数的准确度，提高液体检测的准确度。By such a method, the liquid container size information can be acquired based on the detected data, thereby improving the accuracy of the base material decomposition coefficient of the obtained liquid, and improving the accuracy of the liquid detection.

在一些实施例中，由于容器的几何形状判断也可能不够精准，直接从图像数据中提取的液面高度不够精确，由容器几何信息推导而来的液体其它几何信息也可能不够精确，因此可以将一个或者多个或者所有的几何信息都作为目标函数的未知参数，并设定其参数取值范围，在限定范围内进行最优化计算获得最优的取值。In some embodiments, since the geometry of the container may not be accurate enough, the liquid level directly extracted from the image data is not accurate enough, and other geometric information of the liquid derived from the geometric information of the container may not be accurate enough, so One or more or all of the geometric information is used as the unknown parameter of the objective function, and the parameter range of the parameter is set, and the optimal calculation is performed within the limited range to obtain the optimal value.

通过这样的方法，能够避免由于液体、容器的几何信息获取不准确造成的误差影响获取的基材料分解系数的准确度，从而进一步提高液体检测的准确度。By such a method, it is possible to avoid the accuracy of the base material decomposition coefficient obtained by the error caused by the inaccurate acquisition of the geometric information of the liquid or the container, thereby further improving the accuracy of the liquid detection.

本公开的液体探测方法的另一些实施例的流程图如图5所示。A flow chart of further embodiments of the liquid detection method of the present disclosure is shown in FIG.

在步骤501中，在行包探测过程中检测是否存在液体容器托盘标识。In step 501, it is detected whether there is a liquid container tray identification during the line package detection process.

在步骤502中，若检测到液体容器托盘标识，则执行步骤503，在一些实施例中，在检测到液体容器托盘标识后，还可以根据液体容器托盘标识的位置、姿态或定位点信息确定液体容器托盘的摆放是否符合预定要求，若不符合预定要求，则发出告警信息请求重新摆放，若符合预定要求，则执行步骤503；若未检测到液体容器托盘标识，则持续进行行包探测。In step 502, if the liquid container tray identification is detected, step 503 is performed. In some embodiments, after the liquid container tray identification is detected, the liquid may also be determined according to the position, posture or positioning point information of the liquid container tray identification. If the container tray is placed in accordance with the predetermined requirements, if the predetermined requirements are not met, an alarm message is sent to request relocation. If the predetermined requirement is met, step 503 is performed; if the liquid container tray identifier is not detected, the packet inspection is continued. .

在步骤503中，切换到液体探测模式，通过双能X射线探测器获取待测液体的探测数据。In step 503, switching to the liquid detection mode, the detection data of the liquid to be tested is acquired by the dual energy X-ray detector.

在步骤504中，基于预定基材料信息，根据待测液体的双能探测数据确定待测液体的基材料分解系数。In step 504, based on the predetermined base material information, the base material decomposition coefficient of the liquid to be tested is determined according to the dual energy detection data of the liquid to be tested.

在步骤505中，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。In step 505, the effective atomic number and characteristic density of the liquid to be tested are determined according to the base material decomposition coefficient of the liquid to be tested.

在步骤506中，根据待测液体的有效原子序数和特征密度确定待测液体的危险等级。In step 506, the hazard level of the liquid to be tested is determined according to the effective atomic number and characteristic density of the liquid to be tested.

在步骤507中，根据液体的危险等级判断液体是否为危险液体。若液体为危险物体，则执行步骤508；若液体不为危险物体，则不执行操作。In step 507, it is determined whether the liquid is a dangerous liquid based on the hazard level of the liquid. If the liquid is a dangerous object, step 508 is performed; if the liquid is not a dangerous object, no operation is performed.

在步骤508中，发出告警信息。告警信息可以包括声音、图像等，可以展示液体的危险等级，从而便于工作人员进行相应的操作。In step 508, an alert message is issued. The alarm information can include sounds, images, etc., and can display the hazard level of the liquid, so that the staff can perform corresponding operations.

通过这样的方法，一方面能够将安检***在行包探测和液体探测两个模式中进行切换，根据进入探测区域的物体采用对应模式进行探测，无需分别部署两种安检***分别检测行包和液体，有利于装置在公共安检区域的部署；另一方面能够对危险液体进行自动预警，便于工作人员发现危险液体，进一步提高安检的可靠性。By such a method, on the one hand, the security inspection system can be switched between the two modes of line detection and liquid detection, and the corresponding mode is used for detecting according to the object entering the detection area, and it is not necessary to separately deploy two security inspection systems to detect the package and the liquid respectively. It facilitates the deployment of the device in the public security area; on the other hand, it can automatically alert dangerous liquids, so that workers can find dangerous liquids and further improve the reliability of security inspection.

本公开的液体探测装置的一些实施例的示意图如图6所示。射线探测模块601能够通过双能X射线探测器获取待测液体的探测数据。在一些实施例中，采用X射线源配合双能X射线探测器对待测液体进行探测，分别获取低能探测数据和高能探测数据。基材料分解系数获取模块602能够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。根据待测液体的探测数据能够得到第一分解量、第二分解量，以及射线穿过液体的厚度，根据这些信息能够得到待测液体的基材料分解系数。液体识别模块603能够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。A schematic of some embodiments of the liquid detection device of the present disclosure is shown in FIG. The radiation detecting module 601 is capable of acquiring the detection data of the liquid to be tested by the dual energy X-ray detector. In some embodiments, the X-ray source is used in conjunction with the dual energy X-ray detector to detect the liquid to be detected, and the low energy detection data and the high energy detection data are respectively obtained. The base material decomposition coefficient acquisition module 602 is capable of determining 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. According to the detection data of the liquid to be tested, the first decomposition amount, the second decomposition amount, and the thickness of the radiation passing through the liquid can be obtained, and based on the information, the base material decomposition coefficient of the liquid to be tested can be obtained. The liquid identification module 603 is capable of determining an effective atomic number and a feature density of the liquid to be tested according to a base material decomposition coefficient of the liquid to be tested.

这样的液体探测装置能够利用双能射线探测器的探测数据，基于预定基材料信息得到待测液体的基材料分解系数，并根据基材料分解系数得到待测液体的有效原子序数和特征密度，从而实现液体的识别。由于X射线探测的效率高，且探测范围大，因此能够同时实现多个容器中液体的识别，缩短了探测时间，提高了液体安全检测的效率。Such a liquid detecting device can utilize the detection data of the dual-energy ray detector, obtain a base material decomposition coefficient of the liquid to be tested based on the predetermined base material information, and obtain an effective atomic number and a characteristic density of the liquid to be tested according to the base material decomposition coefficient, thereby Achieve liquid identification. Due to the high efficiency of X-ray detection and the large detection range, it is possible to simultaneously recognize the liquid in a plurality of containers, shorten the detection time, and improve the efficiency of liquid safety detection.

本公开的液体探测装置中基材料分解系数获取模块的一些实施例的示意图如图7所示。容器信息获取单元701能够根据探测数据获取液体容器尺寸信息。在一些实施例中，可以根据探测数据获取扫描图像，进一步根据扫描图像识别容器区域，计算容器的尺寸信息。在一些实施例中，若液体容器的截面为圆形，则液体容器尺寸信息包括半径、壁厚、瓶身有效数据区间中的一个或多个；若液体容器的截面为方形，则液体容器尺寸信息包括边长、壁厚、瓶身有效数据区间中的一个或多个。信息匹配单元702能够基于预定基材料信息，将高能探测数据、低能探测数据分别与预定基材料信息中的关联信息相匹配，获取第一分解量和第二分解量。分解系数确定单元703能够根据第一分解量、第二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。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获取待测液体的基材料分解系数，目标函数可以如上文中公式(1)所示。A schematic diagram of some embodiments of a base material decomposition coefficient acquisition module in a liquid detection device of the present disclosure is shown in FIG. The container information acquisition unit 701 is capable of acquiring liquid container size information based on the probe data. In some embodiments, the scanned image may be acquired based on the detected data, and the container area is further identified based on the scanned image to calculate the size information of the container. In some embodiments, if the liquid container has a circular cross section, the liquid container size information includes one or more of a radius, a wall thickness, and a valid data section of the bottle; and if the cross section of the liquid container is a square, the size of the liquid container The information includes one or more of the side length, the wall thickness, and the effective data interval of the bottle. The information matching unit 702 can match the high energy detection data and the low energy detection data with the associated information in the predetermined base material information based on the predetermined base material information, and acquire the first decomposition amount and the second decomposition amount. The decomposition coefficient determining unit 703 is capable of determining the base material decomposition coefficient of the liquid to be tested based on the first decomposition amount, the second decomposition amount, and the liquid container size information. In some embodiments, the objective function may be set, and the base function decomposition coefficient of the liquid to be tested is acquired by the objective function optimization algorithm, and the objective function may be as shown in the formula (1) above.

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、第二分解量，并根据第一分解量、第二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。Such a device can obtain liquid container size information and a first decomposition amount, a second 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 second 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.

本公开的液体探测装置中液体识别模块的一些实施例的示意图如图8所示。特征密度确定单元801能够在获取第一基材料的分解系数、第二基材料的分解系数后，根据第一基材料的分解系数、第二基材料的分解系数、第一基材料的特征密度和第二基材料的特征密度确定待测液体的特征密度，计算公式可以如上文中公式(2)所示。有效原子序数确定单元802能够在获取第一基材料分解系数、第二基材料分解系数后，根据第一基材料分解系数、第二基材料分解系数、第一基材料的特征密度、第二基材料的特征密度、第一基材料的有效原子序数和第二基材料的有效原子序数确定待测液体的有效原子序数，计算公式可以如上文中公式(3)所示。A schematic of some embodiments of a liquid identification module in a liquid detection device of the present disclosure is shown in FIG. The feature density determining unit 801 can obtain the decomposition coefficient of the first base material and the decomposition coefficient of the second base material according to the decomposition coefficient of the first base material, the decomposition coefficient of the second base material, and the characteristic density of the first base material. The characteristic density of the second base material determines the characteristic density of the liquid to be tested, and the calculation formula can be as shown in the formula (2) above. The effective atomic number determining unit 802 can obtain the first base material decomposition coefficient and the second base material decomposition coefficient according to the first base material decomposition coefficient, the second base material decomposition coefficient, the characteristic density of the first base material, and the second base. The characteristic density of the material, the effective atomic number of the first base material, and the effective atomic number of the second base material determine the effective atomic number of the liquid to be tested, and the calculation formula can be as shown in the formula (3) above.

这样的装置能够根据获取的液体的基材料分解系数得到待测液体的特征密度和有效原子序数，这两个指标是识别液体种类、确定液体危险度的重要指标，从而能够达到液体安全检测的目的。另外，由于运算量小，能够进一步提高液体探测的效率。Such a device can obtain the characteristic density and the effective atomic number of the liquid to be tested according to the base material decomposition coefficient of the obtained liquid, and these two indexes are important indexes for identifying the liquid type and determining the liquidity risk, thereby achieving the purpose of liquid safety detection. . In addition, since the amount of calculation is small, the efficiency of liquid detection can be further improved.

在一些实施例中，液体容器可以放置于液体容器托盘中，液体容器托盘放置于安检***的传送机构上，随着托盘进入探测区域，从而能够固定液体容器的位置，便于进行探测。在一些实施例中，液体容器托盘可以如图3中所示。在一些实施例中，托盘以预定位置放置于探测区域，从而能够优化射线方向与液体容器的相对角度，提高液体容器尺寸信息确定的准确度，从而提高液体探测的准确度。In some embodiments, the liquid container can be placed in a liquid container tray that is placed on the transport mechanism of the security system, and as the tray enters the detection area, the position of the liquid container can be fixed for easy detection. In some embodiments, the liquid container tray can be as shown in FIG. In some embodiments, the tray is placed in the detection area at a predetermined position so that the relative angle of the ray direction to the liquid container can be optimized, and the accuracy of the liquid container size information determination is improved, thereby improving the accuracy of liquid detection.

其中，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。这样的装置能够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。 Where d _{tray, i} is the thickness of the liquid container tray through which the ray i passes, b _{tray, 1} is the predetermined first base material decomposition coefficient of the liquid container tray, b _{tray, 2} is the predetermined second base material decomposition coefficient of the liquid container tray . Such a device can fully consider the influence of the tray on the detection data when the liquid container is placed on the liquid container tray, and ensure the accuracy of the calculation while maintaining the stability of the liquid to be tested, thereby further improving the accuracy of the liquid detection.

在一些实施例中，容器信息获取单元可以按照上文图4的实施例中的方式获取包括半径、边长、壁厚、瓶身有效数据区间等在内的液体容器尺寸信息。In some embodiments, the container information acquisition unit may acquire liquid container size information including a radius, a side length, a wall thickness, a bottle effective data interval, and the like, in the manner of the embodiment of FIG. 4 above.

这样的装置能够根据探测数据较为准确的获取液体容器尺寸信息，从而提高获取的液体的基材料分解系数的准确度，提高液体检测的准确度。Such a device can accurately obtain the liquid container size information according to the detected data, thereby improving the accuracy of the base material decomposition coefficient of the obtained liquid and improving the accuracy of the liquid detection.

本公开的液体探测装置的另一些实施例的示意图如图9所示。射线探测模块901、基材料分解系数获取模块902和液体识别模块903的结构和功能与图6的实施例中相似。液体探测装置还包括托盘识别模块904和告警模块905，其中，托盘识别模块904能够在行包探测过程中检测是否存在液体容器托盘标识，若检测到液体容器托盘标识，则激活射线探测模块901开始液体探测，在一些实施例中，在检测到液体容器托盘标识后，还可以根据液体容器托盘标识的位置、姿态或定位点信息确定液体容器托盘的摆放是否符合预定要求，若不符合预定要求，则发出告警信息请求重新摆放，若符合预定要求，则激活射线探测模块901开始液体探测。若未检测到液体容器托盘标识，则持续进行行包探测。告警模块905能够根据待测液体的有效原子序数和特征密度确定待测液体的危险等级，并根据液体的危险等级判断液体是否为危险液体。若液体为危险物体，发出告警信息，告警信息可以包括声音、图像等，可以展示液体的危险等级，从而便于工作人员进行相应的操作；若液体不为危险物体，则不执行操作。A schematic view of further embodiments of the liquid detecting device of the present disclosure is shown in FIG. The structure and function of the radiation detecting module 901, the base material decomposition coefficient acquisition module 902, and the liquid identification module 903 are similar to those in the embodiment of FIG. The liquid detecting device further includes a tray identifying module 904 and an alarm module 905, wherein the tray identifying module 904 can detect whether there is a liquid container tray identifier during the line package detecting process, and if the liquid container tray identifier is detected, the active ray detecting module 901 starts. The liquid detection, in some embodiments, after detecting the liquid container tray identification, determining whether the liquid container tray is in accordance with the predetermined requirement according to the position, posture or positioning point information of the liquid container tray identification, if the predetermined requirement is not met Then, an alarm message is sent to request relocation, and if the predetermined requirement is met, the activated ray detecting module 901 starts liquid detection. If the liquid container tray identification is not detected, the line package detection is continued. The alarm module 905 can determine the hazard level of the liquid to be tested according to the effective atomic number and the characteristic density of the liquid to be tested, and determine whether the liquid is a dangerous liquid according to the hazard level of the liquid. If the liquid is a dangerous object, an alarm message is issued. The alarm information may include sound, image, etc., and the dangerous level of the liquid may be displayed, thereby facilitating the corresponding operation of the worker; if the liquid is not a dangerous object, the operation is not performed.

这样的装置一方面能够将安检***在行包探测和液体探测两个模式中进行切换，根据进入探测区域的物体采用对应模式进行探测，无需分别部署两种安检***分别检测行包和液体，有利于装置在公共安检区域的部署；另一方面能够对危险液体进行自动预警，便于工作人员发现危险液体，进一步提高安检的可靠性。On the one hand, such a device can switch the security inspection system in the two modes of line detection and liquid detection, and use the corresponding mode to detect according to the object entering the detection area, and it is not necessary to separately deploy two security inspection systems to detect the package and the liquid respectively. Conducive to the deployment of the device in the public security area; on the other hand, it can automatically alert dangerous liquids, so that workers can find dangerous liquids and further improve the reliability of security inspection.

本公开的液体探测装置的一个实施例的结构示意图如图10所示。液体探测装置包括存储器1001和处理器1002。其中：存储器1001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液体探测方法的对应实施例中的指令。处理器1002耦接至存储器1001，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1002用于执行存储器中存储的指令，能够同时实现多个容器中液体的识别，缩短了探测时间，提高了液体安全检测的效率。A schematic structural view of one embodiment of the liquid detecting device of the present disclosure is shown in FIG. The liquid detecting device includes a memory 1001 and a processor 1002. Wherein: the memory 1001 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 liquid detection method above. The processor 1002 is coupled to the memory 1001 and can be implemented as one or more integrated circuits, such as a microprocessor or a microcontroller. The processor 1002 is configured to execute instructions stored in the memory, can simultaneously realize liquid identification in a plurality of containers, shorten detection time, and improve efficiency of liquid safety detection.

在一个实施例中，还可以如图11所示，液体探测装置1100包括存储器1101和处理器1102。处理器1102通过BUS总线1103耦合至存储器1101。该液体探测装置1100还可以通过存储接口1104连接至外部存储装置1105以便调用外部数据，还可以通过网络接口1106连接至网络或者另外一台计算机***(未标出)。此处不再进行详细介绍。In one embodiment, as shown in FIG. 11, the liquid detecting device 1100 includes a memory 1101 and a processor 1102. Processor 1102 is coupled to memory 1101 via BUS bus 1103. The liquid detecting device 1100 can also be connected to the external storage device 1105 via the storage interface 1104 to invoke external data, and can also be connected to the network or another computer system (not shown) via the network interface 1106. It will not be described in detail here.

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，能够同时进行多个容器中液体的识别，缩短了探测时间，提高了液体安全检测的效率。In this embodiment, by storing the data command through the memory and processing the above instruction by the processor, the identification of the liquid in the plurality of containers can be performed simultaneously, the detection time is shortened, and the efficiency of the liquid safety detection is improved.

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液体探测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。In still other embodiments, 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 a corresponding embodiment of the liquid detection method. Those skilled in the art will appreciate that 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. .

本公开的安检***的一些实施例的示意图如图12所示。11为传送机构，在图10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。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***还包括上文中提到的任意一种液体探测装置。当传送机构11传送待测液体经过探测区域时，液体探测装置根据探测器13的探测结果识别待测液体，判断其危险性。A schematic of some embodiments of the security system of the present disclosure is shown in FIG. 11 is a transport mechanism. In Fig. 10, 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. 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 liquid detecting devices mentioned above. When the conveying mechanism 11 conveys the liquid to be tested through the detection area, the liquid detecting means identifies the liquid to be tested based on the detection result of the detector 13, and judges the danger.

在一些实施例中，传送机构11带动待测物体进入安检区域，安检***默认进行行包探测，当液体探测装置根据探测器13获取的探测结果识别到液体容器托盘14时，切换到液体探测模式，利用上文中提到的任意一种液体探测方法识别待测液体，判断其危险性。当托盘离开探测区域时，安检***切换回行包探测模式。In some embodiments, the transport mechanism 11 drives the object to be tested into the security inspection area, and the security inspection system performs the packet inspection by default. When the liquid detection device recognizes the liquid container tray 14 according to the detection result obtained by the detector 13, it switches to the liquid detection mode. Use any of the liquid detection methods mentioned above to identify the liquid to be tested and determine its hazard. When the tray leaves the detection area, the security system switches back to the packet detection mode.

这样的安检***能够在普通行包探测和液体探测两个模式间自动切换，用户无需部署两种设备，也无需手动设置安检模式，一方面减小对安检***所占空间的要求，有利于部署实施；另一方面更加便捷，减少手动切换模式的步骤，避免操作失误，也提高了安检效率。Such a security inspection system can automatically switch between the normal line detection and liquid detection modes. The user does not need to deploy two kinds of equipments, and there is no need to manually set the security inspection mode. On the one hand, the requirements for the space occupied by the security inspection system are reduced, which is beneficial to deployment. Implementation; on the other hand, it is more convenient, reducing the steps of the manual switching mode, avoiding operational errors, and improving the security efficiency.

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。It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure and are not to be construed as limiting thereof; although the present disclosure will be described in detail with reference to the preferred embodiments, those skilled in the art should understand that Modifications of the specific embodiments disclosed are intended to be equivalent to the equivalents of the technical features of the present disclosure.

Claims

一种液体探测方法，包括：A liquid detection method comprising:

通过双能X射线探测器获取待测液体的探测数据；Obtaining detection data of the liquid to be tested by the dual energy X-ray detector;

基于预定基材料信息，根据所述待测液体的所述探测数据确定所述待测液体的基材料分解系数；和Determining, according to the predetermined base material information, a base material decomposition coefficient of the liquid to be tested according to the detection data of the liquid to be tested; and

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。Determining an effective atomic number and a feature density of the liquid to be tested according to the base material decomposition coefficient of the liquid to be tested.
根据权利要求1所述的方法，其中，所述确定所述待测液体的基材料分解系数包括：The method according to claim 1, wherein said determining a base material decomposition coefficient of said liquid to be tested comprises:

根据所述探测数据获取液体容器尺寸信息；Obtaining liquid container size information according to the probe data;

基于预定基材料信息，根据所述待测液体的双能探测数据确定第一分解量和第二分解量；和Determining a first decomposition amount and a second decomposition amount according to the dual energy detection data of the liquid to be tested based on predetermined base material information; and

根据所述第一分解量、所述第二分解量和所述液体容器尺寸信息确定第一基材料的分解系数和第二基材料的分解系数。Determining the decomposition coefficient of the first base material and the decomposition coefficient of the second base material based on the first decomposition amount, the second decomposition amount, and the liquid container size information.
根据权利要求2所述的方法，其中，The method of claim 2, wherein

所述第一基材料的分解系数和第二基材料的分解系数为基于目标函数最优化算法确定；The decomposition coefficient of the first base material and the decomposition coefficient of the second base material are determined based on an objective function optimization algorithm;

根据所述第一基材料的分解系数和所述第二基材料的分解系数确定第一基材料的特征密度和有效原子序数，以及第二基材料的特征密度和有效原子序数；Determining a characteristic density and an effective atomic number of the first base material, and a characteristic density and an effective atomic number of the second base material according to a decomposition coefficient of the first base material and a decomposition coefficient of the second base material;

所述待测液体的所述特征密度为根据所述第一基材料的分解系数和特征密度、所述第二基材料的分解系数和特征密度确定；The characteristic density of the liquid to be tested is determined according to a decomposition coefficient and a characteristic density of the first base material, a decomposition coefficient of the second base material, and a feature density;

所述待测液体的所述有效原子序数为根据所述第一基材料的分解系数、特征密度和有效原子序数，以及所述第二基材料的分解系数、特征密度和有效原子序数确定。The effective atomic number of the liquid to be tested is determined according to a decomposition coefficient, a characteristic density, and an effective atomic number of the first base material, and a decomposition coefficient, a characteristic density, and an effective atomic number of the second base material.
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基材料分解系数包括：根据下面的目标函数公式进行最优化计算，确定所述目标函数f最小时的所述第一基材料的分解系数b _liquid,1和所述第二基材料的分解系数b _liquid,2， The method according to claim 3, wherein said determining a base material decomposition coefficient of said liquid to be tested comprises: performing an optimization calculation according to an objective function formula below, determining said first when said objective function f is minimum The decomposition coefficient of the base material b _{liquid, 1} and the decomposition coefficient of the second base material b _{liquid, 2} ,

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穿过的放置液体容器的托盘厚度，d _container,i为射线i穿过的液体容器厚度，d _liquid,i为射线i穿过的液体厚度，b _tray,1为所述液体容器托盘的预定第一基材料的分解系数，b _tray,2为所述液体容器托盘的预定第二基材料的分解系数，b _container,1为液体容器的第一基材料的分解系数，b _container,2为液体容器的第二基材料的分解系数，i为射线标识，i为自然数且1≤i≤N，N为穿过所述液体容器的投影线总数量。 Wherein 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 acquired according to the detection data of the ray i; d _tray,i is the placement liquid through which the ray i passes The tray thickness of the _container , d _{container, i} is the thickness of the liquid container through which the ray i passes, d _{liquid, i} is the thickness of the liquid through which the ray i passes, b _{tray, 1} is the decomposition of the predetermined first base material of the liquid container tray a coefficient, b _{tray, 2} is a decomposition coefficient of a predetermined second base material of the liquid container tray, b _{container, 1} is a decomposition coefficient of the first base material of the liquid container, b _{container, 2} is a second base material of the liquid container The decomposition coefficient, i is the ray identification, i is a natural number and 1 ≤ i ≤ N, where N is the total number of projection lines passing through the liquid container.
根据权利要求2所述的方法，其中，所述获取液体容器尺寸信息包括：The method of claim 2 wherein said obtaining liquid container size information comprises:

根据放置所述液体容器的托盘卡槽位置获取容器区域；Obtaining a container area according to a position of a tray slot in which the liquid container is placed;

根据所述探测数据基于图像分割获取容器轮廓；Obtaining a container outline based on the image segmentation according to the detection data;

基于预存容器形状数据判断所述容器的几何形状；和Determining the geometry of the container based on pre-stored container shape data; and

根据所述几何形状和所述探测数据提取所述液体容器尺寸信息，所述液体容器尺寸信息包括半径、边长、壁厚或瓶身有效数据区间中的一种或多种。The liquid container size information is extracted based on the geometry and the probe data, the liquid container size information including one or more of a radius, a side length, a wall thickness, or a bottle effective data interval.
根据权利要求1所述的方法，还包括：The method of claim 1 further comprising:

检测液体容器托盘标识；Detecting the liquid container tray identifier;

在检测到所述液体容器托盘标识的情况下，通过双能X射线探测器获取待测液体的所述探测数据；Obtaining the detection data of the liquid to be tested by the dual energy X-ray detector in the case that the liquid container tray identifier is detected;

否则，执行行包探测。Otherwise, perform line packet probing.
根据权利要求1所述的方法，还包括：The method of claim 1 further comprising:

根据所述待测液体的有效原子序数和特征密度确定所述待测液体的危险等级；在所述待测液体为危险液体的情况下，发出告警信息。Determining a hazard level of the liquid to be tested according to an effective atomic number and a characteristic density of the liquid to be tested; and sending an alarm information when the liquid to be tested is a dangerous liquid.
一种液体探测装置，包括：A liquid detecting device comprising:

射线探测模块，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；a radiation detecting module configured to acquire detection data of the liquid to be tested by the dual energy X-ray detector;

基材料分解系数获取模块，被配置为基于预定基材料信息，根据所述待测液体的所述探测数据确定所述待测液体的基材料分解系数；a base material decomposition coefficient acquisition module configured to determine a base material decomposition coefficient of the liquid to be tested according to the probe data of the liquid to be tested based on predetermined base material information;

液体识别模块，被配置为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特征密度和有效原子序数。a liquid identification module configured to determine a characteristic density and an effective atomic number of the liquid to be tested according to the base material decomposition coefficient of the liquid to be tested.
根据权利要求8所述的装置，其中，所述基材料分解系数获取模块包括：The apparatus according to claim 8, wherein said base material decomposition coefficient acquisition module comprises:

容器信息获取单元，被配置为根据所述探测数据获取液体容器尺寸信息；a container information acquiring unit configured to acquire liquid container size information according to the probe data;

信息匹配单元，被配置为基于预定基材料信息，根据所述待测液体的双能探测数据确定第一分解量和第二分解量；和，The information matching unit is configured to determine the first decomposition amount and the second decomposition amount according to the dual energy detection data of the liquid to be tested based on the predetermined base material information;

分解系数确定单元，被配置为根据所述第一分解量、所述第二分解量和所述液体容器尺寸信息确定所述待测液体的所述基材料分解系数。The decomposition coefficient determining unit is configured to determine the base material decomposition coefficient of the liquid to be tested according to the first decomposition amount, the second decomposition amount, and the liquid container size information.
根据权利要求9所述的装置，其中，The apparatus according to claim 9, wherein

所述分解系数确定单元被配置为基于目标函数最优化算法确定所述待测液体的第一基材料的分解系数和第二基材料的分解系数；The decomposition coefficient determining unit is configured to determine a decomposition coefficient of the first base material of the liquid to be tested and a decomposition coefficient of the second base material based on an objective function optimization algorithm;

所述液体识别模块包括：The liquid identification module includes:

特征密度确定单元，被配置为根据所述第一基材料的分解系数和特征密度、所述第二基材料的分解系数和特征密度确定所述待测液体的所述特征密度；a feature density determining unit configured to determine the feature density of the liquid to be tested according to a decomposition coefficient and a feature density of the first base material, a decomposition coefficient of the second base material, and a feature density;

有效原子序数确定单元，被配置为根据所述第一基材料的分解系数、特征密度和有效原子序数，以及所述第二基材料的分解系数、特征密度和有效原子序数确定所述待测液体的所述有效原子序数。An effective atomic number determining unit configured to determine the liquid to be tested according to a decomposition coefficient, a characteristic density, and an effective atomic number of the first base material, and a decomposition coefficient, a characteristic density, and an effective atomic number of the second base material The effective atomic number.
根据权利要求10所述的装置，其中，The device according to claim 10, wherein

所述分解系数确定单元被配置为根据下面的目标函数公式进行最优化计算，确定所述目标函数f最小时的所述第一基材料的分解系数b _liquid,1和所述第二基材料的分解系数b _liquid,2， The decomposition coefficient determining unit is configured to perform an optimization calculation according to the following objective function formula, determining a decomposition coefficient b _{liquid, 1} of the first base material when the objective function f is the smallest and a second base material Decomposition factor b _liquid,2 ,

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穿过的放置液体容器的托盘厚度，d _container,i为射线i穿过的液体容器厚度，d _liquid,i为射线i穿过的液体厚度，b _tray,1为所述液体容器托盘的预定第一基材料的分解系数，b _tray,2为所述液体容器托盘的预定第二基材料的分解系数，b _container,1为液体容器的第一基材料的分解系数，b _container,2为液体容器的第二基材料的分解系数，i为射线标识，i为自然数且1≤i≤N，N为穿过所述容器的投影线总数量。 Wherein 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 acquired according to the detection data of the ray i; d _tray,i is the placement liquid through which the ray i passes The tray thickness of the _container , d _{container, i} is the thickness of the liquid container through which the ray i passes, d _{liquid, i} is the thickness of the liquid through which the ray i passes, b _{tray, 1} is the decomposition of the predetermined first base material of the liquid container tray a coefficient, b _{tray, 2} is a decomposition coefficient of a predetermined second base material of the liquid container tray, b _{container, 1} is a decomposition coefficient of the first base material of the liquid container, b _{container, 2} is a second base material of the liquid container The decomposition coefficient, i is the ray identification, i is a natural number and 1 ≤ i ≤ N, where N is the total number of projection lines passing through the container.
根据权利要求11所述的装置，其中，The apparatus according to claim 11, wherein

所述容器信息获取单元被配置为：The container information obtaining unit is configured to:

根据放置所述液体容器的托盘卡槽位置获取容器区域；Obtaining a container area according to a position of a tray slot in which the liquid container is placed;

根据所述探测数据基于图像分割获取容器轮廓；Obtaining a container outline based on the image segmentation according to the detection data;

基于预存容器形状数据判断所述容器的几何形状；和Determining the geometry of the container based on pre-stored container shape data; and

根据所述几何形状和所述探测数据提取所述液体容器尺寸信息，所述液体容器尺寸信息包括半径、边长、壁厚或瓶身有效数据区间中的一种或多种。The liquid container size information is extracted based on the geometry and the probe data, the liquid container size information including one or more of a radius, a side length, a wall thickness, or a bottle effective data interval.
根据权利要求8所述的装置，还包括：The apparatus of claim 8 further comprising:

托盘识别模块，被配置为检测液体容器托盘标识；在检测到所述液体容器托盘标识的情况下，激活所述射线探测模块通过双能X射线探测器获取待测液体的所述探测数据。The tray identification module is configured to detect the liquid container tray identifier; and in the case that the liquid container tray identifier is detected, the radiation detecting module is activated to acquire the detection data of the liquid to be tested by the dual energy X-ray detector.
根据权利要求8所述的装置，还包括：告警模块，被配置为根据所述待测液体的有效原子序数和特征密度确定所述待测液体的危险等级；在所述待测液体为危险液体的情况下，发出告警信息。The apparatus according to claim 8, further comprising: an alarm module configured to determine a hazard level of the liquid to be tested according to an effective atomic number and a characteristic density of the liquid to be tested; wherein the liquid to be tested is a dangerous liquid In the case of an alarm message.
一种液体探测装置，包括：A liquid detecting device comprising:

存储器；以及Memory;

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7任一项所述的方法。A processor coupled to the memory, the processor being configured to perform the method of any one of claims 1 to 7 based on instructions stored in the memory.
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7任意一项所述的方法的步骤。A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, perform the steps of the method of any one of claims 1 to 7.
一种安检***，其特征在于，包括：A security inspection system, comprising:

传送机构，被配置为带动待测物体运动；a transport mechanism configured to drive the motion of the object to be tested;

射线源和射线探测器，被配置为获取探测数据；和，a source of radiation and a ray detector configured to acquire probe data; and,

权利要求8～15任意一项所述的液体探测装置。A liquid detecting device according to any one of claims 8 to 15.