CN111856603B - Gate apparatus and control method thereof - Google Patents

Abstract

The application discloses a gate device and a control method using the same. Wherein the apparatus comprises: the gate machine comprises a plurality of gate machine bodies and a controller, wherein a gate machine channel is formed between two adjacent gate machine bodies in the plurality of gate machine bodies, the gate machine bodies comprise a first radioactive source detector and a second radioactive source detector, the first radioactive source detector comprises a first NaI scintillation crystal detector and a first neutron moderator material layer, and the second radioactive source detector comprises a second NaI scintillation crystal detector and a second neutron moderator material layer; the controller is respectively connected with the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body; the controller is used for detecting the radioactive source through the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body, and determining a gate channel where the radioactive source is located according to a radioactive source detection result. The equipment can improve the accuracy of equipment detection.

Description

Turnstile equipment and control method thereof

technical field

The present application relates to the technical field of detection equipment, in particular to a gate device and a control method using the gate device.

Background technique

Nuclear safety is an important part of national security, and an important means to ensure nuclear safety is to use nuclear radiation detection equipment for monitoring. Among them, the monitoring of radioactive sources includes gamma ray sources and neutron ray sources. At present, a combined detection method of multiple devices is usually used, that is, an inorganic scintillation detector is used for gamma source detection, and a plastic scintillator or He3 tube is used for neutron detection, so the equipment is more complicated and the cost is higher. Therefore, how to detect through a device is an urgent technical problem to be solved at present.

Contents of the invention

The purpose of this application is to solve one of the technical problems in the related art at least to a certain extent.

For this reason, the first purpose of this application is to propose a gate device, which is easy to implement, low in cost, and high in sensitivity. While detecting the radioactive source, it can determine the gate channel where the radioactive source is located, and can improve equipment detection. accuracy.

The second purpose of the present application is to propose a control method using gate equipment.

The third object of the present application is to provide a computer-readable storage medium.

In order to achieve the above purpose, the gate device provided in the embodiment of the first aspect of the present application includes multiple gate bodies and a controller, and two adjacent gates among the multiple gate bodies A gate channel is formed between the bodies, the gate body includes a first radiation source detector and a second radiation source detector, wherein the second radiation source detector is arranged behind the first radiation source detector, and There is a distance between the second radiation source detector and the first radiation source detector, and the first radiation source detector includes a first NaI scintillation crystal detector and a first neutron moderator material layer, The first neutron moderator material layer encloses a first containment area, the second radioactive source detector includes a second NaI scintillation crystal detector and a second neutron moderator material layer, and the second middle The sub-moderator material layer encloses a second accommodation area, the openings of the first accommodation area and the second accommodation area are both facing the entrance direction of the gate channel, and the first NaI scintillation crystal detector is set In the first accommodation area; the second NaI scintillation crystal detector is arranged in the second accommodation area; the controller is respectively connected with the first NaI scintillation crystal detection in each gate body The detector is connected with the second NaI scintillation crystal detector; wherein, the controller is used to perform radiation source detection through the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body, and according to The radioactive source detection results determine the gate channel where the radioactive source is located.

According to the gate device of the embodiment of the present application, the radiation source is detected through the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body, and the radiation source is determined according to the detection result of the radiation source The gate channel where the radioactive source is located, the device is easy to implement, low cost, and high sensitivity. While detecting the radioactive source, it can determine the gate channel where the radioactive source is located, which can improve the accuracy of equipment detection.

According to an embodiment of the present application, the controller is specifically configured to: for each gate body, acquire the first NaI scintillation crystal detector in the gate body within a preset time, within a preset The first net count accumulated in the first energy window, and the second net count accumulated in the second energy window, and obtain the second NaI scintillation crystal detector in the gate body within a preset time, in A third net count accumulated in said first energy window and a fourth net count accumulated in said second energy window, based on said first net count, second net count, third net count, and fourth net count , determine whether to perform a neutron source alarm, wherein the first energy window and the second energy window do not have overlapping energies, and the energy of the first energy window is greater than the energy of the second energy window ; If it is determined that a neutron source alarm is performed, the first total cumulative net count obtained by the sum of the first net count, the second net count, the third net count and the fourth net count is obtained, and according to the first total accumulative net count, determine the total cumulative net count of the corresponding gate channel, compare the total cumulative net count of each gate channel, and select the gate channel with the largest total cumulative net count as the gate channel according to the comparison result The gate channel where the radioactive source is located.

According to an embodiment of the present application, the controller is specifically configured to: acquire a second total cumulative net count of the first net count plus the third net count; determine whether the second total cumulative net count is exceeding the preset neutron source alarm threshold; if the second total accumulated net count exceeds the preset neutron source alarm threshold, then determine the greater value of the first net count and the third net water number and The first ratio of the smaller value, and determine the second ratio of the larger value to the smaller value of the second net count and the fourth net water number, and obtain the first ratio and the second ratio If the absolute value of the difference is judged to be less than the preset difference threshold, it is determined to perform a neutron source alarm.

According to an embodiment of the present application, the controller is further configured to: when it is determined that no neutron source alarm is performed, obtain the third total accumulated net count of the second net count plus the fourth net count; Judging whether the third total cumulative net count exceeds a preset gamma source alarm threshold; if the third total cumulative net count exceeds the preset gamma source alarm threshold, determine to perform a gamma source alarm; if determined to perform Gamma source alarm, then obtain the first total cumulative net count of the first net count, the second net count, the third net count and the fourth net count, and determine the corresponding gate according to the first total cumulative net count The total accumulated net counts of the channels are compared, and the total accumulated net counts of each gate channel are compared, and the gate channel with the largest total accumulated net count is selected as the gate channel where the radioactive source is located.

According to an embodiment of the present application, the material layers of the first neutron moderator material layer and the second neutron moderator material layer are the same, and both include the first PE material layer, the PVC material layer and the second PE material layer in sequence. material layer.

According to an embodiment of the present application, the first PE material layer, the PVC material layer and the second PE material layer have the same thickness, and the thicknesses are all greater than 0.5 cm.

According to an embodiment of the present application, the first energy window is predetermined according to the energy range of the secondary gamma rays produced by the neutron source, and the second energy window is predetermined according to the energy range produced by the gamma source definite.

In order to achieve the above purpose, the embodiment of the second aspect of the present application proposes a control method using gate equipment, the method includes: using the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body The detector performs radioactive source detection; and according to the radioactive source detection result, the gate channel where the radioactive source is located is determined.

According to the control method performed by the application gate equipment in the embodiment of the present application, the radiation source is detected through the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body, and according to the detection result of the radiation source, Determining the gate channel where the radioactive source is located, the method can determine the gate channel where the radioactive source is located while detecting the radioactive source, making the gate device easy to implement, low in cost, and high in sensitivity, and can improve the accuracy of equipment detection.

According to an embodiment of the present application, the radioactive source detection through the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body includes: for each gate body, obtaining The first NaI scintillation crystal detector in the gate body is within the preset time, the first net count accumulated in the preset first energy window, and the second net count accumulated in the second energy window, And obtain the second NaI scintillation crystal detector in the gate body within a preset time, the third net count accumulated in the first energy window and the fourth net count accumulated in the second energy , according to the first net count, the second net count, the third net count and the fourth net count, determine whether to perform a neutron source alarm, wherein the first energy window does not overlap with the second energy window energy, and the energy of the first energy window is greater than the energy of the second energy window; according to the detection result of the radioactive source, determine the gate channel where the radioactive source is located, including: if it is determined that a neutron source alarm is issued, then Obtaining the first total cumulative net count of the first net count, the second net count, the third net count and the fourth net count, and determining the total cumulative net count of the corresponding gate channel according to the first total cumulative net count , and comparing the total cumulative net counts of each gate channel, and according to the comparison result, selecting the gate channel with the largest total cumulative net count as the gate channel where the radioactive source is located.

According to an embodiment of the present application, the determining whether to perform a neutron source alarm according to the first net count, the second net count, the third net count and the fourth net count includes: obtaining the first net count Adding the second total cumulative net count of the third net count; judging whether the second total cumulative net count exceeds a preset neutron source alarm threshold; if the second total cumulative net count exceeds the preset neutral sub-source alarm threshold, then determine the first ratio of the first net count and the third net water number to the smaller value, and determine the second net count and the fourth net water number calculating the second ratio of the larger value to the smaller value, and acquiring the absolute value of the difference between the first ratio and the second ratio, and judging that the absolute value of the difference is less than a preset difference threshold, Then it is determined to carry out the neutron source alarm.

In order to achieve the above purpose, in the computer-readable storage medium of the embodiment of the third aspect of the present application, when the computer program is executed by the processor, the control method by using the gate device described in the embodiment of the second aspect of the present application is implemented.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is a schematic structural diagram of a gate device according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a gate device according to an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a gate device according to an embodiment of the present application.

Fig. 4 is a flowchart of a control method performed by using a gate device according to an embodiment of the present application.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The following describes the gate device, the control method using the gate device and the computer-readable storage medium according to the embodiments of the present application with reference to the accompanying drawings.

The gate device 100 of this embodiment will be described below with reference to FIG. 1 to FIG. 3 .

Referring to FIG. 1 to FIG. 3 , the gate device 100 of the embodiment of the present application may include: multiple gate bodies 110 and a controller 120 , two adjacent gate bodies 110 among the multiple gate bodies 110 A gate channel 130 is formed between them. Wherein, in this embodiment, a schematic diagram of a gate channel 130 formed between two adjacent gate bodies 110 among the plurality of gate bodies 110 can be referred to FIG. 1 .

Wherein, it should be noted that in FIG. 1 , three gate bodies forming two gate passages are taken as an example for illustration.

Wherein, the gate body 110 includes a first radiation source detector 111 and a second radiation source detector 112, wherein the second radiation source detector 112 is arranged behind the first radiation source detector 111, and the There is a distance between the second radiation source detector 112 and the first radiation source detector 111 .

The first radiation source detector 111 includes a first NaI scintillation crystal detector 1111 and a first neutron moderator material layer 1112, and the first neutron moderator material layer 1112 encloses a first containing area, so The second radiation source detector 112 includes a second NaI scintillation crystal detector 1121 and a second neutron moderator material layer 1122, the second neutron moderator material layer 1122 encloses a second containing area, the Both the openings of the first accommodation area and the second accommodation area face the entrance direction of the gate channel.

In order to improve neutron detection efficiency, in one embodiment of the present application, the material layers of the first neutron moderator material layer 1112 and the second neutron moderator material layer 1122 are the same, and both include the first PE material layer in sequence , PVC material layer and the second PE material layer. Wherein, the first PE material layer, the PVC material layer and the second PE material layer have the same thickness, and the thicknesses can all be greater than 0.5 cm.

In the embodiment of the present application, the first neutron moderator material layer 1112 and the second neutron moderator material layer 1122 are used to improve neutron detection efficiency.

In this embodiment, the first NaI scintillation crystal detector 1111 is disposed in the first accommodation area, and the second NaI scintillation crystal detector 1121 is disposed in the second accommodation area.

The controller 120 is respectively connected to the first NaI scintillation crystal detector 1111 and the second NaI scintillation crystal detector 1121 in each gate body 110 . Wherein, the controller 120 is configured to perform radiation source detection through the first NaI scintillation crystal detector 1111 and the second NaI scintillation crystal detector 1121 in each gate body 110, and determine The gate channel where the radioactive source is located.

Wherein, in this embodiment, the connection structure diagram of the first NaI scintillation crystal detector 1111, the second NaI scintillation crystal detector 1121 and the controller 120 in the gate device can be referred to FIG. 2 .

In the embodiment of the present application, the controller 120 can combine the first NaI scintillation crystal detector 1111 and the second NaI scintillation crystal detector 1121, the counts of the first energy window and the second energy window detected by the two detectors Ratio, so as to realize the discrimination of neutron source alarm and gamma source alarm, and realize channel distinction while reducing the probability of false alarm. For specific implementation manners, reference may be made to subsequent embodiments.

Wherein, in the embodiment of the present application, the above-mentioned first energy window is predetermined according to the energy range of the secondary gamma rays produced by the neutron source, and the second energy window is predetermined according to the energy range produced by the gamma source Wherein, the upper limit of the first energy window is 8MeV, the lower limit of the first energy window is 3.5MeV, the upper limit of the second energy window is 3MeV, and the lower limit of the second energy window is 30keV.

In this embodiment, the energies of events detected by the first NaI scintillation crystal detector 110 and the second NaI scintillation crystal detector 120 can be obtained in an integral manner.

In this embodiment, in order to further improve the accuracy of screening, before determining the energy of the events detected by the first NaI scintillation crystal detector 110 and the second NaI scintillation crystal detector 120 , the temperature drift can be corrected. For example, the energy temperature drift correction uses the characteristic peak of 1462keV to identify the natural background k40 for linear correction.

Wherein, in the embodiment of the present application, the background subtraction can be performed on the energy spectrum obtained in the radioactivity measurement to obtain the net count.

For example, the integral mode can be used for energy calculation, and the controller 120 can obtain, for each gate body 110, the first NaI scintillation crystal detector 1111 in the gate body 110 within a preset time t0 , the first net count accumulated within the preset first energy window 3.5MeV-8MeV, and the second net count accumulated within the second energy window 30kev-3MeV, and the second NaI in the gate body is obtained The scintillation crystal detector 1121 accumulates the third net count in the first energy window and the fourth net count accumulated in the second energy 30kev-3MeV within the preset time t0, according to the first net count Counting, second net counting, third net counting and fourth net counting, determine whether to perform neutron source alarm.

Wherein, the first energy window and the second energy window do not have overlapping energies, and the energy of the first energy window is greater than the energy of the second energy window.

Wherein, in the embodiment of the present application, the controller 120 can obtain the second total cumulative net count of the first net count plus the third net count, and determine whether the second total cumulative net count exceeds the preset neutron source alarm threshold, if the second total cumulative net count exceeds the preset neutron source alarm threshold, then determine the larger and smaller values of the first net count and the third net water number The first ratio r1 of the second net count and the second ratio r2 of the larger and smaller values of the second net count and the fourth net water number, and obtain the first ratio r1 and the second ratio If the absolute value of the difference of r2 is judged to be less than the preset difference threshold, it is determined to perform a neutron source alarm.

Wherein, it can be understood that, if the neutron source exists, the absolute value of the difference between the first ratio r1 and the second ratio r2 is zero, if the gamma source activity is very high at this time, resulting in The accumulation of events produces high energy, which in turn makes the second total cumulative net count exceed the preset alarm threshold of the neutron source. Due to the accumulation of events, the two detectors are stacked one after the other, and the accumulation degree of the two detectors is inconsistent, so the two detectors The net counts of the second energy window in the detector are inconsistent, which results in the two ratios of the first ratio and the second ratio being inconsistent.

If it is determined that a neutron source alarm is performed, the first total accumulated net count obtained by the sum of the first net count, the second net count, the third net count and the fourth net count is obtained, and according to the first total accumulated net count Net count, determine the total cumulative net count of the corresponding gate channel, compare the total cumulative net count of each gate channel, and select the gate channel with the largest total cumulative net count as the emission according to the comparison result Gate channel 130 where the source is located.

It should be noted that, for a channel 130, there are two gate bodies 110 on both sides. Therefore, for a channel 130, the corresponding total cumulative net count is equal to the total detector net count of the two gates next to the channel. Combined, by comparing the total net counts of each channel, the largest gate channel is the gate channel where the radioactive source is located.

In one embodiment of the present application, in order to remind the gate channel where the radioactive source is located, after determining the gate channel where the radioactive source is located, the alarm device can be controlled to remind (such as an acoustic reminder) to remind the gate where the radioactive source is located. aisle.

In an embodiment of the present application, if the absolute value of the difference between the acquired first ratio r1 and the second ratio r2 is smaller than a preset difference threshold, it may be determined that no neutron source alarm is performed.

Wherein, the difference threshold is a preset threshold in the gate device, and the value of the difference threshold is greater than zero and less than 0.1.

Specifically, when the controller determines that no neutron source alarm has been issued, the controller can obtain the third total cumulative net count of the second net count plus the fourth net count, and determine whether the third total cumulative net count Whether the net count exceeds the preset gamma source alarm threshold, if the third total accumulated net count exceeds the preset gamma source alarm threshold, determine to perform a gamma source alarm, and if determine to perform a gamma source alarm, obtain The first total cumulative net count of the first net count, the second net count, the third net count and the fourth net count, according to the first total cumulative net count, determine the total cumulative net count of the corresponding gate channel, and comparing the total cumulative net counts of each gate channel, and selecting the gate channel with the largest total cumulative net count as the gate channel where the radioactive source is located.

According to the gate device of the embodiment of the present application, the radiation source is detected through the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body, and the radiation source is determined according to the detection result of the radiation source The gate channel where the radioactive source is located, the device is easy to implement, low cost, and high sensitivity. While detecting the radioactive source, it can determine the gate channel where the radioactive source is located, which can improve the accuracy of equipment detection.

In order to realize the above embodiments, the present application also proposes a control method using gate equipment.

Fig. 4 is a flowchart of a control method performed by using a gate device according to an embodiment of the present application. As shown in Figure 4, the control method performed by the application gate device may include:

S410. Perform radioactive source detection through the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body.

In the embodiment of the present application, for each gate body, the first net count accumulated by the first NaI scintillation crystal detector in the gate body within a preset first energy window within a preset time can be obtained , and the second net count accumulated in the second energy window, and obtain the second NaI scintillation crystal detector in the gate body within the preset time, the third net count accumulated in the first energy window and the third net count accumulated in the first energy window The fourth net count accumulated in the second energy, according to the first net count, the second net count, the third net count and the fourth net count, determine whether to perform a neutron source alarm, wherein the first energy window and the second energy window There is no overlapping energy, and the energy of the first energy window is greater than the energy of the second energy window.

S420. Determine the gate channel where the radioactive source is located according to the radioactive source detection result.

In the embodiment of the present application, if it is determined that a neutron source alarm is issued, the first total cumulative net count of the first net count, the second net count, the third net count and the fourth net count is obtained, and according to the first total cumulative net count Net count, determine the total cumulative net count of the corresponding gate channel, compare the total cumulative net count of each gate channel, and select the gate channel with the largest total cumulative net count as the gate where the radioactive source is located according to the comparison result machine channel.

It should be noted that, since there are two turnstile bodies on both sides of a passage, for a passage, the corresponding total cumulative net count is equal to the sum of the detector net counts of the two turnstiles next to the passage, which can be By comparing the total net counts of each channel, the largest gate channel is the gate channel where the radioactive source channel is located.

Wherein, it may be determined whether to perform a neutron source alarm according to the first net count, the second net count, the third net count and the fourth net count.

Wherein, according to the first net count, the second net count, the third net count and the fourth net count, determining whether to perform a neutron source alarm can be realized in the following manner: obtaining the first net count plus the second net count of the third net count total cumulative net count; judging whether the second total cumulative net count exceeds the preset neutron source alarm threshold; if the second total cumulative net count exceeds the preset neutron source alarm threshold, then determine the first net count and the third net A first ratio of the larger value to the smaller value in the water number, and determining a second ratio of the larger value to the smaller value in the second net count and the fourth net water number, and obtaining the first ratio and the second ratio If it is judged that the absolute value of the difference is less than the preset difference threshold, it is determined to perform a neutron source alarm.

In one embodiment of the present application, if the absolute value of the difference between the first ratio and the second ratio is greater than the preset difference threshold, it may be determined that no neutron source alarm is performed, and when it is determined that no neutron source alarm is performed, It can obtain the third total cumulative net count of the second net count plus the fourth net count, and judge whether the third total cumulative net count exceeds the preset gamma source alarm threshold. If the third total cumulative net count exceeds the preset gamma source If the horse source alarm threshold is determined, it is determined to perform a gamma source alarm, and if it is determined to perform a gamma source alarm, then the first total accumulated net count of the first net count, the second net count, the third net count and the fourth net count is obtained, According to the first total cumulative net count, determine the total cumulative net count of the corresponding gate channel, compare the total cumulative net counts of each gate channel, and select the gate channel with the largest total cumulative net count as the location where the radioactive source is located. Gate channel.

According to the control method performed by the application gate equipment in the embodiment of the present application, the radiation source is detected through the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body, and according to the detection result of the radiation source, Determining the gate channel where the radioactive source is located, the method can determine the gate channel where the radioactive source is located while detecting the radioactive source, making the gate device easy to implement, low in cost, and high in sensitivity, and can improve the accuracy of equipment detection.

In order to realize the above-mentioned embodiments, the present application also proposes a computer-readable storage medium, wherein when the computer program is executed by a processor, the control method performed by any one of the application gate devices described in the present application is implemented.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected, or electrically connected, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

Any process or method descriptions in flowcharts or otherwise described herein may be understood to represent modules, segments or portions of code comprising one or more executable instructions for implementing specific logical functions or steps of the process , and the scope of preferred embodiments of the present application includes additional implementations in which functions may be performed out of the order shown or discussed, including in substantially simultaneous fashion or in reverse order depending on the functions involved, which shall It should be understood by those skilled in the art to which the embodiments of the present application belong.

The logic and/or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium, For use with instruction execution systems, devices, or devices (such as computer-based systems, systems including processors, or other systems that can fetch instructions from instruction execution systems, devices, or devices and execute instructions), or in conjunction with these instruction execution systems, devices or equipment used. For the purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use in or in conjunction with an instruction execution system, device or device. More specific examples (non-exhaustive list) of computer-readable media include the following: electrical connection with one or more wires (electronic device), portable computer disk case (magnetic device), random access memory (RAM), Read Only Memory (ROM), Erasable and Editable Read Only Memory (EPROM or Flash Memory), Fiber Optic Devices, and Portable Compact Disc Read Only Memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program can be printed, as it may be possible, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or other suitable processing if necessary. The program is processed electronically and stored in computer memory.

It should be understood that each part of the present application may be realized by hardware, software, firmware or a combination thereof. In the embodiments described above, various steps or methods may be implemented by software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

Those of ordinary skill in the art can understand that all or part of the steps carried by the methods of the above embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. During execution, one or a combination of the steps of the method embodiments is included.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing module, each unit may exist separately physically, or two or more units may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules. If the integrated modules are implemented in the form of software function modules and sold or used as independent products, they can also be stored in a computer-readable storage medium.

The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, and the like. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (9)

1. A gate device, characterized in that the gate device comprises a plurality of gate bodies and a controller, and a gate is formed between two adjacent gate bodies among the plurality of gate bodies. channel, the gate body includes a first radioactive source detector and a second radioactive source detector, wherein the second radioactive source detector is arranged behind the first radioactive source detector, and the second radioactive source detector There is a distance between the detector and the first radiation source detector, the first radiation source detector includes a first NaI scintillation crystal detector and a first neutron moderator material layer, and the first neutron The moderator material layer encloses the first accommodation area, and the second radiation source detector includes a second NaI scintillation crystal detector and a second neutron moderator material layer, and the second neutron moderator material layer Enclosing a second accommodation area, the openings of the first accommodation area and the second accommodation area are both facing the entrance direction of the gate channel, The first NaI scintillation crystal detector is set in the first accommodation area; The second NaI scintillation crystal detector is arranged in the second accommodation area; The controller is connected to the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body respectively; Wherein, the controller is used to detect the radioactive source through the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body, and determine the gate where the radioactive source is located according to the radioactive source detection result. The machine channel, the controller, is specifically used to: for each of the gate bodies, obtain the first NaI scintillation crystal detector in the gate body within a preset time, within a preset first energy window The first net count accumulated in the second energy window, and the second net count accumulated in the second energy window, and obtain the second NaI scintillation crystal detector in the gate body within a preset time, at the first energy The third net count accumulated in the window and the fourth net count accumulated in the second energy window, according to the first net count, the second net count, the third net count and the fourth net count, determine whether to perform A neutron source alarm, wherein the first energy window and the second energy window do not have overlapping energies, and the energy of the first energy window is greater than the energy of the second energy window; If it is determined that a neutron source alarm is performed, the first total accumulated net count obtained by the sum of the first net count, the second net count, the third net count and the fourth net count is obtained, and according to the first total accumulated net count Net count, determine the total cumulative net count of the corresponding gate channel, compare the total cumulative net count of each gate channel, and select the gate channel with the largest total cumulative net count as the emission according to the comparison result The gate channel where the source is located. 2. The gate device according to claim 1, wherein the controller is specifically used for: obtaining a second total cumulative net count of the first net count plus the third net count; judging whether the second total cumulative net count exceeds a preset neutron source alarm threshold; If the second total cumulative net count exceeds a preset neutron source alarm threshold, then determine a first ratio of the larger value to the smaller value of the first net count and the third net count, and determine the The second ratio of the larger value to the smaller value of the second net count and the fourth net count, and obtain the absolute value of the difference between the first ratio and the second ratio, and determine the difference If the absolute value of the value is less than the preset difference threshold, it is determined to perform a neutron source alarm. 3. The gate equipment as claimed in claim 1, wherein said controller is also used for: When it is determined that a neutron source alarm is not in progress, obtaining a third total accumulated net count of the second net count plus the fourth net count; judging whether the third total cumulative net count exceeds a preset gamma source alarm threshold; If the third total accumulated net count exceeds a preset gamma source alarm threshold, then determine to perform a gamma source alarm; If it is determined to perform a gamma source alarm, then obtain the first total cumulative net count of the first net count, the second net count, the third net count and the fourth net count, and determine according to the first total cumulative net count Corresponding to the total cumulative net count of the gate channel, comparing the total cumulative net count of each gate channel, and selecting the gate channel with the largest total cumulative net count as the gate channel where the radioactive source is located. 4. The gate device according to claim 1, wherein the material layers of the first neutron moderator material layer and the second neutron moderator material layer are the same, and all include the first PE material in sequence layer, PVC material layer and second PE material layer. 5. The gate device according to claim 4, wherein the first PE material layer, the PVC material layer and the second PE material layer have the same thickness, and the thicknesses are all greater than 0.5 cm. 6. The gate device according to claim 1, wherein the first energy window is predetermined according to the energy range of the secondary gamma rays produced by the neutron source, and the second energy window is determined according to The energy range produced by the gamma source is predetermined. 7. A control method using the gate device according to any one of claims 1-6, characterized in that the method comprises: Radiation source detection by the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body; and According to the detection results of the radioactive source, determine the gate channel where the radioactive source is located. 8. The control method according to claim 7, wherein the detection of the radioactive source through the first NaI scintillation crystal detector and the second NaI scintillation crystal detector in each gate body comprises: For each gate body, obtain the first net count accumulated by the first NaI scintillation crystal detector in the gate body within a preset time, within a preset first energy window, and in the second The second net count accumulated in the energy window, and obtain the second NaI scintillation crystal detector in the gate body within a preset time, the third net count accumulated in the first energy window and the third net count accumulated in the first energy window The fourth net count accumulated in the second energy window, according to the first net count, the second net count, the third net count and the fourth net count, determine whether to perform a neutron source alarm, wherein the first energy The window does not have overlapping energy with the second energy window, and the energy of the first energy window is greater than the energy of the second energy window; According to the radioactive source detection results, determine the gate channel where the radioactive source is located, including: If it is determined to perform a neutron source alarm, then obtain the first total cumulative net count of the first net count, the second net count, the third net count and the fourth net count, and determine according to the first total cumulative net count corresponding to the total cumulative net count of the gate channel, and comparing the total cumulative net count of each gate channel, and according to the comparison result, selecting the gate channel with the largest total cumulative net count as the gate where the radioactive source is located machine channel. 9. The control method according to claim 8, wherein, according to the first net count, the second net count, the third net count and the fourth net count, determining whether to perform a neutron source alarm comprises : obtaining a second total cumulative net count of the first net count plus the third net count; judging whether the second total cumulative net count exceeds a preset neutron source alarm threshold; If the second total cumulative net count exceeds a preset neutron source alarm threshold, then determine a first ratio of the larger value to the smaller value of the first net count and the third net count, and determine the The second ratio of the larger value to the smaller value of the second net count and the fourth net count, and obtain the absolute value of the difference between the first ratio and the second ratio, and determine the difference If the absolute value of the value is less than the preset difference threshold, it is determined to perform a neutron source alarm.

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