Transmission line type nuclear radiation intelligent monitoring system

Abstract

The application discloses a kind of transmission line type nuclear radiation intelligent supervision systems, system includes: the communication connection of basic nuclear radiation monitoring module, nuclide identification and preplan push module, background management module and remote monitoring module;Wherein, the basic nuclear radiation monitoring module is used to realize to the goods conveyed by conveyer belt is carried out online real-time image acquisition, nuclear radiation detection and audible light alarm;The nuclide identification and preplan push module is used to realize nuclide identification, and according to nuclear radiation alarm intensity exceeding standard push disposal preplan and safety protection preplan;The background management module is used to realize the management of multiple types radioactive monitoring system, the storage analysis and data interaction of detection data and image are connected;The remote monitoring module is used to realize the remote monitoring of nuclear radiation intelligent supervision system, parameter setting, fault diagnosis and multi-point network layout control.It can solve the problem that system false alarm rate is high, nuclide identification compatibility is poor, emergency disposal lacks standardized preplan.

Description

Technical Field

[0001] This invention relates to the field of nuclear radiation monitoring technology, and specifically to a transmission line type intelligent nuclear radiation monitoring system. Background Technology

[0002] Nuclear radiation monitoring is a crucial means of safeguarding national security, public health, and environmental safety. Especially in scenarios such as customs inspection and logistics transportation, online monitoring of nuclear radiation in goods transported via transmission lines can effectively prevent the illegal inflow or spread of nuclear materials and radioactive substances. Existing transmission line-type nuclear radiation monitoring systems suffer from the following problems: First, fluctuations in background radiation can easily lead to false alarms, causing shutdowns and impacting logistics efficiency. Second, the nuclide identification function has poor compatibility with existing detection equipment, requiring replacement of core detection components for nuclide identification, resulting in high modification costs. Third, various types of radioactive monitoring systems (vehicles, pedestrians, baggage, and cargo) operate independently, lacking a unified back-end management platform, hindering data sharing and reducing interoperability. Fourth, there is a lack of standardized emergency response plans for exceeding radiation limits, resulting in insufficient standardization and timeliness of on-site response. Therefore, developing a transmission line-type intelligent nuclear radiation monitoring system with low false alarm rate, strong compatibility, multi-system linkage, standardized plans, and remote monitoring capabilities has become an urgent technical challenge. Summary of the Invention

[0003] The purpose of this invention is to provide a transmission line-type intelligent nuclear radiation monitoring system to address the shortcomings of traditional technologies. It can solve the problems of high false alarm rates, poor nuclide identification compatibility, low inter-system coordination, and lack of standardized emergency response plans in existing nuclear radiation monitoring systems.

[0004] One embodiment of this application provides a transmission line nuclear radiation intelligent monitoring system, the system comprising:

[0005] The system includes a basic nuclear radiation monitoring module for communication connectivity, a nuclide identification and contingency plan push module, a backend management module, and a remote monitoring module; among which... The basic nuclear radiation monitoring module is used to realize online real-time image acquisition, nuclear radiation detection, and audible and visual alarms for goods transported by the conveyor belt; The nuclide identification and contingency plan push module includes a nuclear radiation intelligent monitoring unit and a nuclide identification unit. The nuclide identification and contingency plan push module is used to identify nuclides and push out disposal plans and safety protection plans according to the intensity of nuclear radiation exceeding the alarm. The back-end management module includes a back-end management unit and a radioactive monitoring system back-end management unit. The back-end management module is used to manage multiple types of radioactive monitoring systems, store and analyze detection data and images, and facilitate data interaction and connection. The remote monitoring module is used to realize remote monitoring, parameter setting, fault diagnosis and multi-point network deployment of the nuclear radiation intelligent supervision system.

[0006] Optionally, the basic nuclear radiation monitoring module includes a detector box assembly, an audible and visual alarm device, control equipment, monitoring equipment, a UPS uninterruptible power supply, a dedicated support for the transport line, and cables and pipelines; The detector housing assembly integrates... X-ray detectors and neutron detectors, the The X-ray detector adopts a combination structure of plastic scintillator and dual low-noise photomultiplier tubes. The sensitive volume of a single crystal is not less than 15L, and it is equipped with 5mm lead shielding to prevent background interference. The neutron detector is a He-3 proportional counter tube, and the outer wrapping material includes polyethylene moderator.

[0007] Optionally, the basic nuclear radiation monitoring module includes a dynamic radiation background tracking algorithm unit. The dynamic radiation background tracking algorithm automatically adjusts the reference point for radiation detection by continuously detecting environmental background radiation fluctuation data, thereby suppressing false alarms caused by differences in cargo.

[0008] Optionally, the reference point for radiation detection is a radiation dose rate determination threshold obtained by combining real-time sampling data of environmental background radiation with confidence coefficients after smoothing by moving mean and fluctuation variance analysis. This threshold is used to distinguish between environmental background and / or cargo interference signals and suspected excessive radioactivity signals. Among them, the dynamic detection reference point calculation is combined with the moving average. Fluctuation standard deviation and confidence coefficient The radiation detection reference point is determined according to the following formula. :

[0009] Among them, the moving average satisfy , The length of the sliding window. Indicates the sampling sequence time. satisfy .

[0010] Optionally, the online real-time image acquisition, nuclear radiation detection, and audible and visual alarm for the goods conveyed by the conveyor belt include: The real-time operating speed of the conveyor belt is obtained, and combined with the preset length of the detection channel, it is determined whether the goods are in the preset detection area. In response to the cargo being within the preset detection area, the detector box assembly continuously collects radiation signals at a preset sampling frequency to determine the radiation dose in the preset detection area; The audible and visual alarm level corresponding to nuclear radiation detection is determined based on the radiation dose in the preset detection area and the reference point for radiation detection.

[0011] Optionally, in response to the cargo being within a preset detection area, the detector housing assembly continuously acquires radiation signals at a preset sampling frequency to determine the radiation dose in the preset detection area, including: When the goods are within the preset detection area, the detector box assembly operates at a sampling frequency. Radiation signals are continuously acquired, and the smoothed radiation dose for the preset detection area is calculated using a moving average filter, as shown below:

[0012] in, This indicates the radiation dose in the preset detection area after smoothing. Indicates the size of the filtering window. Indicates the number of samples, satisfying , This indicates the moment when the goods begin to leave the inspection channel. This indicates the moment when the goods have fully entered the inspection channel. Indicates the first Radiation dose rate of the second sample.

[0013] Optionally, determining the audible and visual alarm level corresponding to the nuclear radiation detection based on the radiation dose of the preset detection area and the reference point of the radiation detection includes: Based on the radiation dose in the preset detection area, calculate the mean and maximum dose rates after smoothing within the preset detection area. If the mean of the smoothed dose rate within the preset detection area is greater than the value of the reference point of the radiation detection, and the maximum value of the dose rate within the preset detection area is greater than the product of the value of the reference point of the radiation detection and the peak value verification coefficient, then it is determined that the nuclear radiation of the cargo exceeds the standard and the corresponding audible and visual alarm is triggered.

[0014] Optionally, the The detection energy range of the X-ray detector is 25 keV-3 MeV, and the detection energy range of the neutron detector is thermal neutrons to 14 MeV.

[0015] Optionally, the monitoring area of ​​the system has a width of 0.1m-1.6m and a height of not less than 1.3m; The system's dynamic detection capability enables detection of 0.96 × 10⁻⁶. 5 Bq's ¹³ 7 Detection of bare Cs sources; the system's dynamic neutron detection capability enables detection of neutrons up to 3000 ns². 5 ²Cf neutron source detection.

[0016] Optionally, the backend management module includes a data association storage unit, which is used to associate and store image acquisition data, radiation detection data, and alarm information; wherein, the storage capacity of a single alarm association data entry satisfies:

[0017] in, Indicates the storage capacity of a single frame image. Indicates the total number of frames. Indicates the storage capacity of a single frame image. This indicates the data storage capacity for a single radiation dose rate. Indicates the storage capacity for alarm information.

[0018] Compared with existing technologies, this invention provides a transmission line-type intelligent nuclear radiation monitoring system, including a basic nuclear radiation monitoring module, a nuclide identification and contingency plan push module, a back-end management module, and a remote monitoring module connected by communication. The basic nuclear radiation monitoring module is used to perform online real-time image acquisition, nuclear radiation detection, and audible and visual alarms for goods transported by the conveyor belt. The nuclide identification and contingency plan push module includes a nuclear radiation intelligent monitoring unit and a nuclide identification unit, used to identify nuclides and push emergency response plans and safety protection plans based on the intensity of nuclear radiation exceeding the alarm limit. The back-end management module includes a back-end management unit and a radioactive monitoring system back-end management unit, used to manage multiple types of radioactive monitoring systems, store and analyze detection data and images, and facilitate data interaction. The remote monitoring module is used to remotely monitor the intelligent nuclear radiation monitoring system, set parameters, diagnose faults, and deploy multi-point networks. It can solve the problems of high false alarm rates, poor nuclide identification compatibility, low multi-system linkage, and lack of standardized emergency response plans in existing nuclear radiation monitoring systems. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a transmission line type nuclear radiation intelligent monitoring system provided in an embodiment of the present invention. Detailed Implementation

[0020] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] See Figure 1 , Figure 1 This is a schematic diagram of a transmission line type intelligent monitoring system for nuclear radiation provided in an embodiment of the present invention. Figure 1A transmission line-type intelligent nuclear radiation monitoring system 100 is disclosed. The system 100 includes: a basic nuclear radiation monitoring module 101, a nuclide identification and contingency plan push module 102, a back-end management module 103, and a remote monitoring module 104, all connected via communication. The basic nuclear radiation monitoring module 101 is used for online real-time image acquisition, nuclear radiation detection, and audible and visual alarms for goods transported by the conveyor belt. The nuclide identification and contingency plan push module 102 includes a nuclear radiation intelligent monitoring unit and a nuclide identification unit. This module identifies nuclides and pushes emergency response and safety protection plans based on the intensity of nuclear radiation exceeding alarm limits. The back-end management module 103 includes a back-end management unit and a radioactive monitoring system back-end management unit. This back-end management module manages multiple types of radioactive monitoring systems, stores and analyzes detection data and images, and facilitates data interaction. The remote monitoring module 104 enables remote monitoring, parameter setting, fault diagnosis, and multi-point network deployment of the intelligent nuclear radiation monitoring system.

[0022] In one optional embodiment, the basic nuclear radiation monitoring module includes a detector box assembly, an audible and visual alarm device, control equipment, monitoring equipment, a UPS uninterruptible power supply, a dedicated support for the transport line, and cables and pipelines; the detector box assembly integrates... X-ray detectors and neutron detectors, the The X-ray detector adopts a combination structure of plastic scintillator and dual low-noise photomultiplier tubes. The sensitive volume of a single crystal is not less than 15L, and it is equipped with 5mm lead shielding to prevent background interference. The neutron detector is a He-3 proportional counter tube, and the outer wrapping material includes polyethylene moderator.

[0023] Among them, the The X-ray detector has a detection energy range of 25 keV-3 MeV, and the neutron detector has a detection energy range of thermal neutrons to 14 MeV. The monitoring area of ​​the system is 0.1m-1.6m wide and no less than 1.3m high; the system's dynamic detection capability reaches 0.96 × 10⁻⁶ keV. 5 Bq's ¹³ 7 Detection of bare Cs sources; the system's dynamic neutron detection capability enables detection of neutrons up to 3000 ns². 5 ²Cf neutron source detection.

[0024] Specifically, in this embodiment, the complete collaborative workflow of system 100 is as follows: After the goods enter the detection channel, the entrance sensor of the basic nuclear radiation monitoring module 101 triggers detection. The gamma-ray detector and neutron detector begin to continuously collect radiation signals. The field controller preprocesses the signals and dynamically adjusts the detection reference point. When the detected radiation dose rate exceeds the dynamic reference point and meets the criteria for exceeding the limit, the field controller triggers a graded audible and visual alarm and simultaneously activates a high-definition monitoring camera to collect image data. The basic nuclear radiation monitoring module 101 transmits the preprocessed energy spectrum data, exceedance information, and image data to the nuclide identification and contingency plan push module 102. The case push module 102 completes nuclide identification, matches the corresponding disposal plan and safety protection plan, and synchronizes the results to the back-end management module 103. The back-end management module 103 stores all data, generates real-time monitoring reports, and uploads the data to the superior supervision system. The remote monitoring module 104 displays the operating status of each module, exceedance information, nuclide identification results, and plan content in real time. Staff can view and issue operation instructions through the remote monitoring software. After the staff completes the on-site disposal according to the pushed plan, they can manually reset the alarm through the back-end management module 103, and the system will return to normal monitoring status.

[0025] Through the coordinated operation of the above modules, System 100 achieves intelligent supervision of the entire process of real-time detection, accurate identification, standardized handling, and remote control of nuclear radiation on conveyor belt cargo, effectively improving the efficiency and accuracy of nuclear radiation supervision.

[0026] For example, a transmission line-type intelligent nuclear radiation monitoring system 100 is deployed in the container conveyor belt inspection channel of a customs logistics supervision area in a coastal port. It is used for nuclear radiation safety monitoring of imported ores, bulk cargo, and other items transported via conveyor belts. The conveyor belt inspection channel is 1.6m wide and 3m long, with a rated operating speed of 0.4m / s. The average daily cargo throughput is approximately 500 batches. The ambient temperature range is -10℃ to 45℃, and the humidity is ≤90%, meeting the system's designed operating environment requirements.

[0027] The overall architecture of System 100 is a modular communication connection design. The basic nuclear radiation monitoring module 101 serves as the core of front-end data acquisition, and it achieves real-time data transmission with the nuclide identification and contingency plan push module 102 via industrial Ethernet. The nuclide identification and contingency plan push module 102 synchronizes the processed nuclide identification results, alarm information, and contingency plan data to the back-end management module 103. The back-end management module 103 performs data storage, analysis, and multi-system linkage, and establishes bidirectional communication with the remote monitoring module 104 based on the TCP / IP protocol to achieve remote operation and maintenance and monitoring. Each module has a clear division of labor and works together efficiently, forming a closed-loop supervision process from front-end acquisition to mid-end processing, back-end management, and remote operation and maintenance.

[0028] Among them, the basic nuclear radiation monitoring module 101 is the front-end sensing unit of the system, mainly composed of It consists of a radiation detector, a neutron detector, a high-definition surveillance camera, a graded audible and visual alarm device, a field controller, a UPS uninterruptible power supply, customized transport line brackets, and dedicated cable conduits. Among these, The X-ray detector can adopt a combination structure of plastic scintillator + dual low-noise photomultiplier tubes, with a single crystal sensitive volume of 15L and an external 5mm thick lead shielding layer to shield the measurement results from interference from ambient background radiation. The neutron detector can use a He-3 proportional counter tube with an outer layer of polyethylene moderator to improve the detection efficiency of neutron radiation. The field controller has a built-in embedded processor and dynamic background radiation tracking algorithm, which is responsible for coordinating detector sampling, signal preprocessing, alarm triggering and camera linkage control.

[0029] The core function of this module is to realize online real-time image acquisition, nuclear radiation detection, and audible and visual alarms for goods transported by the conveyor belt. The specific working process is as follows: When goods enter the inspection channel via the conveyor belt The X-ray detector and the neutron detector start working simultaneously. The X-ray detector covers an energy detection range of 25 keV to 3 MeV, while the neutron detector covers an energy range of thermal neutrons to 14 MeV. Together, they enable the detection of substances that may be present in the cargo. Comprehensive capture of X-rays and neutron radiation signals. The detector continuously collects radiation dose rate data at a reference sampling frequency of 50Hz. The field controller performs preprocessing on the raw sampled data, including leakage background compensation, temperature correction, and weighted moving average filtering, to eliminate environmental interference and equipment noise and improve detection accuracy. Simultaneously, through a dynamic radiation background tracking algorithm, it continuously collects environmental background radiation fluctuation data and automatically adjusts the radiation detection reference point, effectively suppressing false alarms caused by differences in cargo material and density.

[0030] The surveillance camera is installed at the top center of the detection channel, with its lens directly facing the core detection area of ​​the conveyor belt, maintaining a 24-hour standby ready state. When the on-site controller determines that radiation exceeds the standard, it immediately triggers the camera to start collecting data. It can use a 30fps frame rate to capture not only images of the scene after the exceedance occurs but also, through a 0.5s pre-collection function, record the state of the goods before the exceedance, ensuring complete image data coverage of the entire event. The collected images are automatically timestamped and linked to radiation detection data for the corresponding time period, providing intuitive evidence for subsequent source tracing and handling.

[0031] The audible and visual alarm devices are installed on both sides of the entrance and exit of the detection channel. When radiation exceedance is confirmed, a tiered alarm is triggered based on the intensity of the exceedance. For minor exceedances, such as when the average radiation dose rate is within 1-2 times the dynamic reference point, an audible and visual signal with a frequency of 1Hz is emitted, and the light flashes yellow. For severe exceedances, such as when the average radiation dose rate exceeds twice the dynamic reference point, an audible and visual signal with a frequency of 2Hz is emitted, and the light flashes red at a high frequency. The alarm duration is extended by an additional 10 seconds after the goods have completely left the detection channel to ensure timely detection and response by personnel.

[0032] The nuclide identification and contingency plan push module 102 is the core processing unit of the system, consisting of a nuclear radiation intelligent monitoring unit and a nuclide identification unit. The nuclear radiation intelligent monitoring unit has a built-in high-performance processor, supporting compatibility with nuclear radiation detection equipment from different brands. The nuclide identification unit integrates a nuclide library, energy spectrum analysis algorithms, and a contingency plan database. The nuclide library contains characteristic parameters of various common radioactive nuclides, and the contingency plan database stores disposal and safety protection plans consistent with relevant regulations of the General Administration of Customs.

[0033] The core function of this module is to identify radionuclides and push corresponding emergency response plans and safety protection plans based on the intensity of the nuclear radiation exceeding the alarm limit. The specific working process is as follows: The basic nuclear radiation monitoring module 101 transmits the preprocessed radiation spectrum data to this module in real time. The nuclide identification unit first performs peak-finding processing on the spectrum data, such as using a symmetric zero-area transformation algorithm, to accurately identify the position and energy of characteristic peaks. Subsequently, it converts the characteristic peak channel addresses into actual energies through energy calibration curves, compares them with the characteristic energies of nuclides in the nuclide library, and combines confidence level calculations to determine the types of radioactive nuclides contained in the cargo. This module supports nuclide identification without replacing the plastic scintillator of the original nuclear radiation detection equipment. Installation does not require changes to the spatial layout of the detection channel, making it highly adaptable and flexible in deployment.

[0034] The intelligent nuclear radiation monitoring unit, based on the radiation exceedance intensity data transmitted by the basic nuclear radiation monitoring module 101 and combined with the identified nuclide types, matches the corresponding response plans and safety protection plans from the contingency plan database. For example, when ¹³ is identified... 7When the average radiation dose rate of Cs nuclide is 0.7 μSv / h (severely exceeding the standard), the emergency response plan includes operational steps such as "immediately suspending the conveyor belt operation," "delineating a warning area," and "arranging for professional personnel to wear protective equipment for further testing." The safety protection plan includes the selection of protective equipment (such as lead aprons and protective gloves) and personnel safety distance requirements. The plan is simultaneously pushed to the display interface of the on-site controller and the monitoring terminal of the back-end management module in the form of a pop-up window to guide staff in standardized handling. At the same time, this module supports online updates and maintenance of the plan database according to the updates of the General Administration of Customs regulations to ensure the timeliness and compliance of the plans.

[0035] The backend management module 103 is the central management unit of the system, consisting of a backend management unit and a radioactivity monitoring system backend management unit. The backend management unit has a built-in SQLite database, supporting large-capacity data storage; the radioactivity monitoring system backend management unit integrates data interfaces, analysis tools, report generators, and system management functions, and is compatible with various types of radioactivity monitoring systems, such as vehicle radioactivity detection systems, pedestrian radioactivity monitoring systems, and baggage radioactivity monitoring systems.

[0036] The core function of this module is to achieve unified management of multiple types of radioactive monitoring systems, storage and analysis of detection data and images, and data interaction and integration. The specific working process is as follows: The back-end management unit of the radioactive monitoring system connects to data from other radioactive monitoring systems within the port customs supervision area, including those monitoring vehicles, pedestrians, and baggage, through standardized data interfaces. The system displays the operational status, detection results, and alarm information of each system on a single management interface, enabling centralized management and control of nuclear radiation monitoring data across multiple scenarios. Staff can switch between different systems to view real-time data without switching between multiple independent systems, thus improving monitoring efficiency.

[0037] The back-end management unit uniformly stores the radiation detection data and image data transmitted by the basic nuclear radiation monitoring module 101, as well as the nuclide identification results and contingency plan data transmitted by the nuclide identification and contingency plan push module 102. The database supports 20 years of historical data retention and is indexed by "date-cargo batch-data type," facilitating quick retrieval and traceability by staff. Simultaneously, the back-end management unit of the radioactive monitoring system incorporates data statistical analysis tools that can automatically generate daily / weekly / monthly monitoring reports, statistically analyzing key indicators such as cargo throughput, exceedance rate, and nuclide type distribution, providing data support for regulatory decision-making.

[0038] The backend management module 103 connects real-time monitoring data, including alarm information for exceeding limits, radionuclide identification results, and cargo images, to the customs supervision center and the radioactive subsystem of the General Administration of Customs' logistics monitoring system via a dedicated network interface, achieving seamless data integration and synchronization. Simultaneously, it can receive specification update instructions and parameter adjustment requirements from the superior supervision system, ensuring that the system operates in accordance with customs supervision standards.

[0039] The remote monitoring module 104 serves as the system's operation and maintenance management unit. It can consist of a monitoring center composed of several industrial servers, remote monitoring software, and a communication network, built on a multi-point network deployment architecture based on the TCP / IP protocol. The monitoring center server can be deployed in the remote operation and maintenance room of the port customs, and the remote monitoring software supports multi-user login and hierarchical permission management.

[0040] The core function of this module is to enable remote monitoring, parameter setting, fault diagnosis, and multi-point network deployment of the nuclear radiation intelligent monitoring system 100. The specific working process is as follows: Staff can log in to the remote monitoring software via office computer or mobile terminal to view the real-time operating status of the basic nuclear radiation monitoring module 101, such as the working status of the detector, whether the camera is collecting data normally, whether the alarm device is intact, real-time radiation detection data, image acquisition screen and nuclide identification results, so as to realize remote real-time monitoring of the detection channel and grasp the supervision situation without going to the site.

[0041] For different types of goods, such as ores, agricultural products, and industrial products, staff can issue parameter adjustment commands through remote monitoring software. These commands include adjusting the detector sampling frequency, the confidence coefficient of the dynamic radiation background tracking algorithm, the radiation exceedance judgment delay threshold, and the camera acquisition frame rate. This allows the system to adapt to the regulatory needs of different goods and improves monitoring flexibility. Parameter adjustment commands are transmitted to the backend management module 103 via an encrypted communication channel and then synchronized to the corresponding frontend module, ensuring that parameter modifications are secure and effective.

[0042] The remote monitoring software monitors the operating parameters of each module in the system in real time, such as voltage, current, and communication delay. When a module malfunctions, such as detector sampling interruption, communication signal loss, or database storage failure, it automatically triggers a fault alarm and displays the fault location, fault type, and possible causes on the monitoring interface. Staff can remotely troubleshoot based on the fault prompts. Simple faults can be repaired directly through remote operation; for complex faults, maintenance personnel can be dispatched to the site promptly, minimizing system downtime.

[0043] The monitoring center uses multiple servers to simultaneously monitor System 100, employing a redundant design. If one server fails, another can immediately take over the monitoring task, ensuring uninterrupted remote monitoring. Furthermore, this module supports expansion to intelligent nuclear radiation monitoring systems with multiple detection channels, enabling centralized remote monitoring across multiple channels and adapting to scenarios requiring parallel monitoring of multiple channels, such as large ports and logistics parks.

[0044] In one optional implementation, the basic nuclear radiation monitoring module includes a dynamic radiation background tracking algorithm unit. The dynamic radiation background tracking algorithm automatically adjusts the reference point for radiation detection by continuously detecting environmental background radiation fluctuation data, thereby suppressing false alarms caused by differences in cargo.

[0045] It should be noted that the reference point for radiation detection is based on real-time sampling data of environmental background radiation. The radiation dose rate determination threshold is obtained by combining the confidence coefficient with the moving mean smoothing and fluctuation variance analysis. This threshold is used to distinguish between environmental background and / or cargo interference signals and suspected excessive radioactivity signals. Among them, the dynamic detection reference point calculation is combined with the moving average. Fluctuation standard deviation and confidence coefficient The radiation detection reference point is determined according to the following formula. :

[0046] Among them, the moving average satisfy , The length of the sliding window. Indicates the sampling sequence time. satisfy .

[0047] In one optional implementation, the online real-time image acquisition, nuclear radiation detection, and audible and visual alarm for the goods transported by the conveyor belt may include: Step 1: Obtain the real-time running speed of the conveyor belt and, in conjunction with the preset length of the detection channel, determine whether the goods are within the preset detection area.

[0048] Step 2: In response to the cargo being within the preset detection area, the detector box assembly continuously collects radiation signals at a preset sampling frequency to determine the radiation dose of the preset detection area.

[0049] Specifically, in response to the cargo being within a preset detection area, the detector housing assembly continuously acquires radiation signals at a preset sampling frequency to determine the radiation dose in the preset detection area, including: When the goods are within the preset detection area, the detector box assembly operates at a sampling frequency. Radiation signals are continuously acquired, and the smoothed radiation dose for the preset detection area is calculated using a moving average filter, as shown below:

[0050] in, This indicates the radiation dose in the preset detection area after smoothing. Indicates the size of the filtering window. Indicates the number of samples, satisfying , This indicates the moment when the goods begin to leave the inspection channel. This indicates the moment when the goods have fully entered the inspection channel. Indicates the first Radiation dose rate of the second sample.

[0051] Step 3: Determine the audible and visual alarm level corresponding to the nuclear radiation detection based on the radiation dose of the preset detection area and the reference point of the radiation detection.

[0052] Specifically, determining the audible and visual alarm level corresponding to nuclear radiation detection based on the radiation dose of the preset detection area and the reference point of the radiation detection may include: Step 3-1: Based on the radiation dose of the preset detection area, calculate the mean and maximum dose rates of the smoothed dose rate within the preset detection area.

[0053] For example, the mean of the smoothed dose rate within a preset detection area can be calculated as follows:

[0054] Maximum dose rate

[0055] Step 3-2: If the mean of the smoothed dose rate in the preset detection area is greater than the value of the reference point of the radiation detection and the maximum value of the dose rate in the preset detection area is greater than the product of the value of the reference point of the radiation detection and the peak value verification coefficient, then it is determined that the nuclear radiation of the cargo exceeds the standard and the corresponding audible and visual alarm is triggered.

[0056] For example, the triggering condition for the corresponding audible and visual alarm is: When satisfied and An audible and visual alarm is triggered at a certain time, where 1.3 is the peak value verification coefficient.

[0057] In one optional implementation, the background management module includes a data association storage unit, which is used to associate and store image acquisition data, radiation detection data, and alarm information; wherein the storage capacity of a single alarm association data entry satisfies:

[0058] in, Indicates the storage capacity of a single frame image. Indicates the total number of frames. Indicates the storage capacity of a single frame image. This indicates the data storage capacity for a single radiation dose rate. Indicates the storage capacity for alarm information.

[0059] As can be seen, this invention provides a transmission line-type intelligent nuclear radiation monitoring system, including a basic nuclear radiation monitoring module, a nuclide identification and contingency plan push module, a back-end management module, and a remote monitoring module connected by communication. The basic nuclear radiation monitoring module is used to perform online real-time image acquisition, nuclear radiation detection, and audible and visual alarms for goods transported by the conveyor belt. The nuclide identification and contingency plan push module includes a nuclear radiation intelligent monitoring unit and a nuclide identification unit, used to identify nuclides and push emergency response plans and safety protection plans based on the intensity of nuclear radiation exceeding the alarm limit. The back-end management module includes a back-end management unit and a radioactive monitoring system back-end management unit, used to manage multiple types of radioactive monitoring systems, store and analyze detection data and images, and facilitate data interaction. The remote monitoring module is used to remotely monitor the intelligent nuclear radiation monitoring system, set parameters, diagnose faults, and deploy multi-point networks. It can solve the problems of high false alarm rates, poor nuclide identification compatibility, low multi-system linkage, and lack of standardized emergency response plans in existing nuclear radiation monitoring systems.

[0060] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0062] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of the units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0063] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0064] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0065] If the aforementioned integrated units are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned memory includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0066] The embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A transmission line type nuclear radiation intelligent monitoring system, characterized in that, The system includes: The system includes a basic nuclear radiation monitoring module for communication connectivity, a nuclide identification and contingency plan push module, a backend management module, and a remote monitoring module; among which... The basic nuclear radiation monitoring module is used to realize online real-time image acquisition, nuclear radiation detection, and audible and visual alarms for goods transported by the conveyor belt; The nuclide identification and contingency plan push module includes a nuclear radiation intelligent monitoring unit and a nuclide identification unit. The nuclide identification and contingency plan push module is used to identify nuclides and push out disposal plans and safety protection plans according to the intensity of nuclear radiation exceeding the alarm. The back-end management module includes a back-end management unit and a radioactive monitoring system back-end management unit. The back-end management module is used to manage multiple types of radioactive monitoring systems, store and analyze detection data and images, and facilitate data interaction and connection. The remote monitoring module is used to realize remote monitoring, parameter setting, fault diagnosis and multi-point network deployment of the nuclear radiation intelligent supervision system.

2. The intelligent monitoring system for transmission line nuclear radiation according to claim 1, characterized in that, The basic nuclear radiation monitoring module includes a detector box assembly, an audible and visual alarm device, control equipment, monitoring equipment, a UPS uninterruptible power supply, a special support for the transport line, and cables and pipelines. The detector housing assembly integrates... X-ray detectors and neutron detectors, the The X-ray detector adopts a combination structure of plastic scintillator and dual low-noise photomultiplier tubes. The sensitive volume of a single crystal is not less than 15L, and it is equipped with 5mm lead shielding to prevent background interference. The neutron detector is a He-3 proportional counter tube, and the outer wrapping material includes polyethylene moderator.

3. The intelligent monitoring system for transmission line nuclear radiation according to claim 2, characterized in that, The basic nuclear radiation monitoring module includes a dynamic radiation background tracking algorithm unit. The dynamic radiation background tracking algorithm automatically adjusts the reference point for radiation detection by continuously detecting environmental background radiation fluctuation data, thereby suppressing false alarms caused by differences in cargo.

4. The intelligent monitoring system for transmission line nuclear radiation according to claim 3, characterized in that, The reference point for radiation detection is a radiation dose rate determination threshold obtained by combining real-time sampling data of environmental background radiation with confidence coefficients after smoothing by moving mean and fluctuation variance analysis. This threshold is used to distinguish between environmental background and / or cargo interference signals and suspected excessive radioactivity signals. Among them, the dynamic detection reference point calculation is combined with the moving average. Fluctuation standard deviation and confidence coefficient The radiation detection reference point is determined according to the following formula. : Among them, the moving average satisfy , The length of the sliding window. Indicates the sampling sequence time. satisfy .

5. The intelligent monitoring system for transmission line nuclear radiation according to claim 4, characterized in that, The online real-time image acquisition, nuclear radiation detection, and audible and visual alarm for goods transported by the conveyor belt include: The real-time operating speed of the conveyor belt is obtained, and combined with the preset length of the detection channel, it is determined whether the goods are in the preset detection area. In response to the cargo being within the preset detection area, the detector box assembly continuously collects radiation signals at a preset sampling frequency to determine the radiation dose in the preset detection area; The audible and visual alarm level corresponding to nuclear radiation detection is determined based on the radiation dose in the preset detection area and the reference point for radiation detection.

6. The intelligent monitoring system for transmission line nuclear radiation according to claim 5, characterized in that, In response to the cargo being within a preset detection area, the detector housing assembly continuously acquires radiation signals at a preset sampling frequency to determine the radiation dose in the preset detection area, including: When the goods are within the preset detection area, the detector box assembly operates at a sampling frequency. Radiation signals are continuously acquired, and the smoothed radiation dose for the preset detection area is calculated using a moving average filter, as shown below: in, This indicates the radiation dose in the preset detection area after smoothing. Indicates the size of the filtering window. Indicates the number of samples, satisfying , This indicates the moment when the goods begin to leave the inspection channel. This indicates the moment when the goods have fully entered the inspection channel. Indicates the first Radiation dose rate of the second sample.

7. The intelligent monitoring system for transmission line nuclear radiation according to claim 6, characterized in that, The step of determining the audible and visual alarm level corresponding to nuclear radiation detection based on the radiation dose of the preset detection area and the reference point of the radiation detection includes: Based on the radiation dose in the preset detection area, calculate the mean and maximum dose rates after smoothing within the preset detection area. If the mean of the smoothed dose rate within the preset detection area is greater than the value of the reference point of the radiation detection, and the maximum value of the dose rate within the preset detection area is greater than the product of the value of the reference point of the radiation detection and the peak value verification coefficient, then it is determined that the nuclear radiation of the cargo exceeds the standard and the corresponding audible and visual alarm is triggered.

8. The intelligent monitoring system for transmission line nuclear radiation according to claim 7, characterized in that, The The detection energy range of the X-ray detector is 25 keV-3 MeV, and the detection energy range of the neutron detector is thermal neutrons to 14 MeV.

9. The intelligent monitoring system for transmission line nuclear radiation according to claim 8, characterized in that, The monitoring area of ​​the system has a width of 0.1m-1.6m and a height of not less than 1.3m; The system's dynamic detection capability enables detection of 0.96 × 10⁻⁶. 5 Bq's ¹³ 7 Detection of bare Cs sources; the system's dynamic neutron detection capability enables detection of neutrons up to 3000 ns². 5 ²Cf neutron source detection.

10. The intelligent monitoring system for transmission line nuclear radiation according to claim 9, characterized in that, The backend management module includes a data association storage unit, which is used to associate and store image acquisition data, radiation detection data, and alarm information; wherein, the storage capacity of a single alarm association data entry meets the following requirements: in, Indicates the storage capacity of a single frame image. Indicates the total number of frames. Indicates the storage capacity of a single frame image. This indicates the data storage capacity for a single radiation dose rate. Indicates the storage capacity for alarm information.

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