Radioactive substance leakage rapid detection method and system

Abstract

The invention relates to the technical field of environment management, and discloses a radioactive substance leakage rapid detection method and system, and the method comprises the steps: continuously collecting environment parameters, and adjusting the operation state of a first object in combination with the feature parameters of a second object; starting the adjusted first object, exciting a first feature of the second object, and collecting a first feature signal of the second object; transmitting the first characteristic signal of the second object to a third object, and performing signal processing; performing time processing on the first characteristic signal of the second object, and identifying the type of the second object; and according to the first characteristic signal intensity, realizing positioning of the second object, and performing dynamic regulation and control. Through combination of real-time environment monitoring, laser excitation and fluorescence signal processing, accurate detection and positioning of non-radioactive or radioactive substances are realized. The accuracy and sensitivity of signals are improved by adopting a time-resolved fluorescence lifetime measurement technology, and the accuracy of substance positions is further improved by combining a triangulation positioning algorithm.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental management, and in particular to a method and system for rapid detection of radioactive substance leakage. Background Art

[0002] As the scale of industrial production, energy development, and chemical storage and transportation continues to expand, the risk of leakage of harmful substances in the environment has also increased significantly. These substances include radioactive substances, chemical pollutants, and volatile organic compounds (VOCs). If they are not detected and located in time, they may not only cause long-term damage to the environment, but also threaten human health. Traditional harmful substance detection technologies usually rely on manual sampling and laboratory analysis. Not only do they have long detection cycles and slow response speeds, they are also easily affected by complex environmental conditions and are difficult to meet the needs of rapid response and precise positioning. At the same time, many existing detection equipment has weak ability to distinguish between multiple substances, and has significant deficiencies in detection accuracy, sensitivity, and environmental adaptability.

[0003] In recent years, material detection methods based on fluorescence excitation and time-resolved technology have gradually become a research hotspot. These methods achieve rapid identification of specific substances by stimulating the characteristic fluorescence signals of target substances and combining them with high-precision signal processing technology. However, most current technologies are still at the single-point detection stage, making it difficult to locate the spatial distribution of material leaks. At the same time, the effects of environmental parameters (such as temperature, humidity, air pressure, etc.) on fluorescence signals have not been fully corrected, resulting in insufficient detection reliability in complex environments. Summary of the invention

[0004] In view of the above-mentioned problems, the present invention is proposed.

[0005] Therefore, the technical problem solved by the present invention is to quickly and accurately detect and locate the leakage of non-radioactive or radioactive materials in a complex environment.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: A method for rapid detection of radioactive material leakage, comprising: continuously collecting environmental parameters, and adjusting the operating state of a first object in combination with characteristic parameters of a second object;

[0007] Starting the adjusted first object, stimulating the first characteristic of the second object, and collecting the first characteristic signal of the second object;

[0008] transmitting the first characteristic signal of the second object to the third object and performing signal processing;

[0009] performing time processing on the first characteristic signal of the second object to identify the type of the second object;

[0010] The second object is positioned according to the first characteristic signal strength and dynamically regulated.

[0011] As a preferred solution of the method for rapid detection of radioactive substance leakage of the present invention, the characteristic parameters of the second object include parameters characterizing the physical, chemical and environmental response characteristics of the second object.

[0012] As a preferred solution of the method for rapid detection of radioactive material leakage of the present invention, the exciting the first characteristic of the second object includes using the first object to stimulate the first characteristic of the second object to generate a collectible first characteristic signal of the second object.

[0013] As a preferred solution of the method for rapid detection of radioactive material leakage of the present invention, the signal processing includes screening and optimizing the first characteristic signal of the second object and improving the quality of the first characteristic signal of the second object.

[0014] As a preferred solution of the rapid detection method for radioactive material leakage described in the present invention, the time processing of the first characteristic signal of the second object includes calculating the lifetime of the first characteristic signal of the second object using time resolution technology and generating a visually expressed result.

[0015] As a preferred solution of the rapid detection method for radioactive material leakage described in the present invention, the identification of the type of the second object includes but is not limited to comparing the result of the visual expression with a preset database, and using a decision tree model to identify the type of the second object based on the lifespan of the first characteristic signal of the second object and the matching degree of the preset database.

[0016] As a preferred solution of the rapid detection method for radioactive material leakage described in the present invention, wherein: the positioning of the second object based on the first characteristic signal strength includes but is not limited to combining the first characteristic signal strength of the second object at multiple monitoring points, using a triangulation positioning algorithm, and combining a distance model to achieve the positioning of the second object.

[0017] A rapid detection system for radioactive material leakage, wherein:

[0018] A data acquisition module continuously collects environmental parameters and adjusts the operating state of the first object in combination with characteristic parameters of the second object;

[0019] an excitation module, which starts the adjusted first object, excites the first characteristic of the second object, and collects the first characteristic signal of the second object;

[0020] A signal transmission module transmits the first characteristic signal of the second object to the third object and performs signal processing;

[0021] an identification module, performing time processing on the first characteristic signal of the second object to identify the type of the second object;

[0022] The positioning module realizes the positioning of the second object according to the strength of the first characteristic signal and performs dynamic regulation.

[0023] A computer device comprises: a memory and a processor; the memory stores a computer program, wherein the processor implements the steps of any one of the methods of the present invention when executing the computer program.

[0024] A computer-readable storage medium stores a computer program, wherein the computer program, when executed by a processor, implements the steps of any one of the methods of the present invention.

[0025] Beneficial effects of the invention: The rapid detection method for radioactive material leakage provided by the invention realizes accurate detection and positioning of non-radioactive or radioactive materials by combining real-time environmental monitoring, laser excitation and fluorescence signal processing. The accuracy and sensitivity of the signal are improved by using time-resolved fluorescence lifetime measurement technology, and the accuracy of the material position is further improved by combining the triangulation positioning algorithm. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0027] Figure 1 This is an overall flow chart of a method for rapid detection of radioactive material leakage provided by the first embodiment of the present invention. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative work should fall within the scope of protection of the present invention.

[0029] Example 1, reference Figure 1 , as an embodiment of the present invention, provides a method for rapid detection of radioactive material leakage, comprising:

[0030] S1: According to the first characteristic signal strength, the second object is located and dynamically regulated.

[0031] In one implementation of the present application, the first object refers to a device for exciting a target substance, such as a laser light source or an optical system, which is responsible for generating light of a specific frequency to guide the excitation of a characteristic signal of the target substance; the second object is a target substance to be detected, such as a radioactive substance, a chemical leakage substance, or a substance carrying a fluorescent marker, which releases a characteristic fluorescent signal or other response signal after excitation; the third object is a signal receiving and processing device, including an optical fiber transmission system, a photomultiplier tube (PMT) or a data processing module, which is used to enhance, transmit and analyze the characteristic signal of the second object to provide data support for substance identification and positioning.

[0032] In an optional embodiment, the first object can also be a device for exciting target exhaust gas molecules, such as a laser light source or ultraviolet lamp of a specific wavelength, which is responsible for exciting fluorescent markers or chemical groups with responsive characteristics in the exhaust gas molecules; the second object is pollutants in industrial exhaust gas, such as volatile organic compounds (VOCs), carbon monoxide, sulfur dioxide, etc., which release characteristic fluorescence or spectral signals after excitation; the third object is a signal receiving and processing device, such as a photodetector, a spectrometer, or a monitoring system equipped with data processing capabilities, which is used to receive characteristic signals of exhaust gas, enhance and analyze its intensity and characteristics, thereby achieving accurate positioning of the pollution source.

[0033] In an optional embodiment, the first object can also be a device for exciting fluorescent markers in biological samples, such as a laser or LED light source of a specific wavelength, which is used to excite fluorescent dyes or markers in the sample; the second object is the target substance to be detected in the biological sample, such as a tumor marker, a specific protein or a DNA fragment, which produces a characteristic fluorescence signal under excitation after being fluorescently labeled; the third object is a signal detection and analysis system, such as a fluorescence microscope, a flow cytometer or a medical detection device with a signal processing module, which is used to receive, enhance and analyze fluorescence signals, thereby identifying target biological molecules or lesions and achieving accurate diagnosis.

[0034] The characteristic parameters of the second object include parameters characterizing the physical, chemical and environmental response characteristics of the second object.

[0035] The characteristic parameters of the second object include its fluorescence characteristics and the physicochemical properties of the substance. Fluorescence characteristics mainly include fluorescence emission wavelength, fluorescence intensity, fluorescence lifetime, and fluorescence decay curve; physicochemical properties may include the chemical composition of the second object, the binding characteristics of the marker and the target substance, the concentration of gas molecules or the concentration of the marker in the solution, etc. These characteristic parameters are extracted through excitation and signal processing to accurately identify the type and concentration of the second object.

[0036] According to the environmental parameters and the characteristic parameters of the second object, the operating state of the laser light source or the excitation device is dynamically adjusted. Specifically, the output power, frequency, pulse width and beam focus position of the laser light source are adjusted to ensure matching with the absorption spectrum of the second object and optimize the excitation efficiency; at the same time, according to factors such as ambient temperature, humidity, and air pressure, the output characteristics of the light source are calibrated to minimize the impact of environmental interference on the excitation effect and ensure that the characteristic signal of the second object can be efficiently excited and detected.

[0037] S2: Start the adjusted first object, stimulate the first characteristic of the second object, and collect the first characteristic signal of the second object.

[0038] The adjusted first object is started to generate laser pulses of a specific frequency, and the optical system is used to focus the light beam to the target area to stimulate the first feature of the second object; the second object releases a characteristic signal (such as a fluorescence signal) under light excitation, and the signal is captured by the collection lens and transmitted to the signal processing unit via the optical fiber. The process includes the generation and optimization of excitation light, the focusing of the light beam and the excitation of the target area, and the capture and transmission of the characteristic signal of the second object.

[0039] S3: Transmit the first characteristic signal of the second object to the third object and perform signal processing.

[0040] The characteristic signal is efficiently transmitted to a third object through optical fiber or other transmission devices, and a photomultiplier tube (PMT) or other detector is used to receive the signal and convert it into an electrical signal. The signal is then filtered to eliminate background noise, and the signal strength is enhanced by an amplifier. The time resolution technology is used to analyze the attenuation characteristics of the signal, and key parameters such as fluorescence lifetime are extracted. Finally, the signal is classified, compared and identified through the data processing module to provide accurate data support for material detection and positioning.

[0041] S4: Performing time processing on the first characteristic signal of the second object to identify the type of the second object.

[0042] The time delay and decay curve of the fluorescence signal are measured through time resolution technology, and key characteristic parameters such as fluorescence lifetime are extracted. The signal quality is optimized by combining background noise suppression and signal enhancement technology. The time characteristics of the fluorescence signal are analyzed using a mathematical fitting algorithm. The processed results are compared with the preset database to identify the type of the second object. The results are visualized and expressed to provide basic data support for subsequent material positioning and regulation.

[0043] In one implementation of the present application, a decision tree model is used to identify the type of the second object. Time processing is performed to obtain fluorescence lifetime or other characteristic signal attenuation information, and the processing results are visualized. These data are then compared with the material characteristic signals stored in a preset database, and the type is identified using a decision tree model based on the lifetime of the first characteristic signal of the second object and the matching degree of the preset database. The decision tree model automatically identifies the type of the second object based on the similarity between the characteristic signal and the known substances in the database, thereby accurately determining the properties of the target substance.

[0044] In an optional embodiment, the type of the second object can also be identified using a support vector machine algorithm by collecting the first characteristic signal of the second object under different environmental conditions and extracting key features therein (such as fluorescence signal intensity, signal decay rate, etc.) as training data. A database containing known material features is pre-established, and the labeled signal data set is used for training during the training phase to learn the classification boundaries between the various materials. Through the SVM algorithm, the system can accurately classify the second object as a certain material type based on the matching degree between the first characteristic signal of the second object and the known database.

[0045] In an optional embodiment, the type of the second object can also be identified by using an artificial neural network, and the fluorescence lifetime and other characteristic signals (such as signal intensity and decay curve) of the second object are input into the neural network. The network processes the signal characteristics layer by layer through multiple layers of nodes (such as input layer, hidden layer, and output layer), and automatically learns the characteristic patterns of the substance from the training data. After training, the neural network can identify the pattern that is most similar to the known substance and accurately classify the type of the second object.

[0046] S5: Positioning the second object according to the first characteristic signal strength and performing dynamic regulation.

[0047] In one implementation of the present application, a triangulated positioning algorithm is used to locate the second object, and signal strength data is collected at multiple monitoring points. The signal strength is inversely proportional to the distance. Secondly, based on the known relationship between signal strength and distance, the triangulated positioning algorithm is combined with the signal strength of each monitoring point to calculate the distance of the second object from each monitoring point, and then the target position is deduced. In addition, considering the impact of environmental factors on signal propagation, the system can be corrected through real-time environmental data to optimize positioning accuracy. Finally, the system outputs the three-dimensional spatial position of the second object, thereby achieving accurate positioning.

[0048] In an optional embodiment, the second object can also be located using a time difference of arrival (TDOA) positioning algorithm by installing a signal receiving device on sensors at multiple known positions and measuring the time difference of the signal from the second object (such as the leak source) to each sensor. Each sensor records the arrival time of the signal and calculates the time difference of the signal arriving at each sensor based on the known signal propagation speed (such as the speed of light or the speed of sound). By solving a set of hypersphere equations, the position of the second object can be accurately determined, thereby achieving spatial positioning and subsequent regulation of the target substance.

[0049] In an optional embodiment, the second object can also be located by using a maximum signal strength positioning (RSSI) algorithm through multiple sensors installed in different positions to measure the intensity of the first characteristic signal (such as a fluorescent signal) released by the second object. According to the attenuation law of the signal intensity, the algorithm estimates the distance between each sensor and the second object. By comparing the signal strengths received by different sensors and using a known signal attenuation model, the position of the signal source is determined. This positioning process can be combined with multi-point signal strength data, and the positioning accuracy can be further improved through an optimization algorithm, thereby achieving accurate positioning of the spatial position of the second object.

[0050] Once the positioning result is obtained, the system will adjust the environment or operating conditions in real time for dynamic control based on factors such as the location and concentration of the target substance. The system automatically adjusts its sensitivity, signal acquisition frequency or control strategy based on real-time data feedback. The system will continue to adjust and control as the location of the substance, environmental conditions and detection accuracy change to ensure accurate positioning and safe control of the target substance.

[0051] Embodiment 2 is an embodiment of the present invention, which provides a rapid detection system for radioactive material leakage, including:

[0052] S1: Use light of a specific frequency to excite fluorescent markers in the air or surface samples within the detection area, and the fluorescent markers are selectively combined with radioactive particles in advance;

[0053] Furthermore, a precise laser pulse is generated by a transmitter, whose wavelength matches the absorption spectrum of the fluorescent marker; the laser pulse passes through a focusing lens to form a high-density light beam, which is irradiated to the air or surface sample in the area to be tested; after the fluorescent marker in the sample absorbs the light energy, it immediately enters an excited state, and the excited fluorescent marker subsequently releases characteristic fluorescence.

[0054] Specifically, a high-stability, narrow-linewidth laser is used as the light source, and its output wavelength must be precisely matched to the absorption spectrum of the preset fluorescent marker. The laser beam diameter is increased by a beam expander to reduce the divergence angle and improve the beam quality. Subsequently, a high-precision focusing lens (e.g., an achromatic lens) is used to focus the laser beam onto a designated area on the sample surface or in the air to form a high-intensity light spot. The focal length and position of the focusing lens can be adjusted by a precision motor to optimize the focal size and position of the beam and improve the excitation efficiency.

[0055] Fluorescent markers are pre-introduced into the air or surface samples of the area to be tested. These markers are designed to bind only to specific radioactive particles. When a high-density laser beam is irradiated onto the sample, the fluorescent markers absorb light energy and transition to an excited state. The fluorescent markers in the excited state will spontaneously return to the ground state with a certain probability, while releasing characteristic fluorescence with a wavelength different from that of the excitation light, which forms the basis of the detection signal.

[0056] The characteristic fluorescence signal is focused by a collection lens and then guided to an optical fiber to ensure efficient transmission of the signal. The optical fiber guides the fluorescence signal to a detection unit, which contains a photomultiplier tube (PMT) and other signal processing components for receiving, amplifying and analyzing the fluorescence signal.

[0057] This specific implementation ensures effective excitation of fluorescent markers by precisely controlling laser pulses and optimizing beam focusing, thereby generating characteristic fluorescent signals that can be used to detect radioactive substances. This method not only improves the sensitivity and specificity of detection, but also provides high-quality raw data for subsequent signal processing and data analysis.

[0058] S2: Transmitting the excited fluorescence signal to a detection unit via an optical fiber. The detection unit includes at least one photomultiplier tube to receive and enhance the fluorescence signal. In the detection unit, the fluorescence signal is filtered to eliminate background light interference.

[0059] Furthermore, the excited fluorescence signal is transmitted to the detection unit via the optical fiber, including: the optical fiber head end is placed in the detection area to capture the fluorescence signal generated by the fluorescent marker, and the fluorescence signal is reflected and propagated inside the optical fiber; the other end of the optical fiber is connected to the input port of the detection unit, and an optical coupling agent is set at the entrance of the detection unit.

[0060] In the detection unit, the fluorescence signal is filtered, including: before the signal reaches the photomultiplier tube, it passes through the pre-filter to filter out non-fluorescence signals; the signal after the filter is converted into an electrical signal by the photomultiplier tube, and the primary electrical signal is sent to the bandpass filter circuit to suppress noise; the filtered signal is then passed through the amplifier to reach the level required for subsequent processing.

[0061] Specifically, the optical fiber tip is designed to be in close contact with the detection area or maintain a certain distance to capture the fluorescent signal generated by the fluorescent marker. The optical fiber tip may have a special coating or structure to improve the signal collection efficiency. The captured fluorescent signal propagates along the internal reflection of the optical fiber. The choice of optical fiber material and structure ensures minimal signal attenuation and scattering, thereby ensuring signal quality. The other end of the optical fiber is connected to the input port of the detection unit. In order to maximize the coupling efficiency of the optical signal, an optical coupling agent such as silicone, epoxy resin, etc. is usually used at the interface to reduce light loss caused by air gaps.

[0062] Before the signal reaches the photomultiplier tube (PMT), it first passes through a pre-filter. This filter is designed to block light at the excitation wavelength and only allow the fluorescence signal to pass, effectively eliminating background light interference. The signal that passes through the filter is received by the photomultiplier tube, and the PMT converts the photons into electrons. This process greatly enhances the signal strength because each photon can trigger a series of electron multiplication events. The primary electrical signal is sent to a bandpass filter circuit, which is designed to suppress noise and only allow signals within a specific frequency range to pass, further improving the signal-to-noise ratio. The filtered signal then enters the amplifier to increase the amplitude of the signal to the optimal level required for subsequent signal processing and analysis.

[0063] The amplified and preprocessed signals will be sent to a data acquisition card or a dedicated signal processing chip for digitization and further data analysis.

[0064] S3: Use time-resolved technology to measure fluorescence lifetime, distinguish the fluorescence characteristics of different substances, and compare the measured fluorescence lifetime data with the reference value in the preset radioactive material database to determine whether there is radioactive material;

[0065] Furthermore, time-resolved technology is used to measure the fluorescence lifetime and distinguish the fluorescence characteristics of different substances, including: the time-resolved module captures the timestamp of each fluorescence event and records the time difference between each fluorescence event and the excitation pulse; constructs a fluorescence decay curve based on the time difference, analyzes the curve shape, and identifies the differences in fluorescence characteristics of different radioactive substances.

[0066] The measured fluorescence lifetime data is compared with the reference value in the preset radioactive material database, including: the data processing unit reads the fluorescence lifetime data and compares it with the standard value in the database. The comparison process uses statistical methods to evaluate the confidence interval of the data; when the sample fluorescence lifetime falls within the confidence interval of a certain radioactive material, it is considered a match; the matching result triggers an alarm mechanism to indicate the presence of potential radioactive materials.

[0067] In order to accurately distinguish the fluorescence characteristics of different substances and determine the presence of radioactive substances, the following is a detailed operation procedure:

[0068] Using a high-speed time-resolved module, the module can accurately record the moment of occurrence of each fluorescence event, that is, the time point when the fluorescence photon is detected. By comparing the precise time interval between each fluorescence event and the corresponding excitation pulse, this time difference is recorded. Since the fluorescence lifetime reflects the time it takes for the fluorescent molecule to return to the ground state from the excited state, this time difference contains information about the fluorescence lifetime.

[0069] Based on the collected time difference data, a fluorescence decay curve is constructed. The fluorescence decay curve describes the exponential decay law of fluorescence intensity over time, which reflects the characteristics of fluorescence lifetime. By analyzing the shape of the fluorescence decay curve, the unique fluorescence characteristics of different radioactive substances can be identified. After each radioactive substance is combined with a specific fluorescent marker, it will have its own unique fluorescence lifetime, which is the key to distinguishing different radioactive substances.

[0070] The data processing unit automatically reads the measured fluorescence lifetime data and compares it with the reference value in the preset radioactive material database. The database stores the fluorescence lifetime data of known radioactive materials and the corresponding confidence intervals.

[0071] Time processing is performed to obtain fluorescence lifetime decay information, and the processing results are visualized. These data are then compared with the material characteristic signals stored in the preset database, and the type is identified using a decision tree model based on the lifetime of the fluorescence signal and the matching degree of the preset database. The decision tree model automatically identifies the type of the second object based on the similarity between the characteristic signal and the known substances in the database, thereby accurately determining the properties of the target substance.

[0072] Once the presence of radioactive material is confirmed, the system will automatically trigger the alarm mechanism, issue a warning through visual, sound or wireless communication, and mark the potential radioactive material information in the detection report.

[0073] S4: If there is radioactive material, the triangulation positioning algorithm is started (based on the aerial triangulation technology to obtain the three-dimensional coordinates of the measuring point space), and the location information of the radioactive source is inverted according to the fluorescence intensity distribution. At the same time, the environmental monitoring subsystem is turned on to record the temperature, humidity and air pressure of the detection area to correct possible environmental impacts;

[0074] Some basic formulas of triangulation positioning algorithm:

[0075] Positioning equation: The coordinates of the three base stations are

[0076] (x1,y1,z1)(x1,y1,z1, (x2,y2,z2)(x2,y2,z2), (x3,y3,z3)(x3,y3,z3),

[0077] The coordinates of the radiation source are (x, y, z)(x, y, z), then the positioning equation can be expressed as:

[0078]

[0079] Among them, d1, d2, and d3 are the distances from the detection point to the radiation source.

[0080] Weighted RSSI positioning algorithm: Considering the different effects of different measuring points (fluorescence intensity) on positioning accuracy, a weighted method is introduced to integrate the measured position values. The weight of the measuring point with strong fluorescence is high, and the weight of the weak fluorescence is low.

[0081]

[0082] Furthermore, the location information of the radiation source is inverted based on the fluorescence intensity distribution, including: using a positioning algorithm to analyze the spatial distribution pattern of the fluorescence intensity, and calculating the concentration distribution map of the fluorescent marker based on the intensity gradient; using the concentration distribution map to infer the possible position range of the radiation source, and using the triangulation positioning principle in combination with multi-point measurement data to accurately locate the radiation source.

[0083] Correction of possible environmental impacts includes: continuous monitoring of environmental changes through temperature and humidity sensors, recording temperature and humidity data; simultaneous collection of atmospheric pressure information by air pressure sensors; combining environmental data with fluorescence intensity data to establish an environmental impact correction model. The correction model dynamically adjusts the fluorescence intensity readings to eliminate interference from environmental factors.

[0084] In order to accurately determine the location of the radiation source and correct for interference caused by environmental factors, the details are as follows:

[0085] The localization algorithm begins by analyzing the fluorescence intensity data collected from multiple detection points, which reflect the concentration of fluorescent markers at different locations. Based on the fluorescence intensity distribution, a three-dimensional concentration distribution map is constructed, which depicts the spatial variation of the concentration of fluorescent markers in the detection area, providing a basis for locating the radiation source. By calculating the fluorescence intensity gradient at different positions, the direction of the highest point of fluorescent marker concentration can be inferred, that is, the possible location of the radiation source. Combining the fluorescence intensity data of multiple detection points, the triangulation positioning principle is applied, and the exact location of the radiation source is calculated through a mathematical model. This process may involve solving nonlinear equations or iterative optimization algorithms to improve positioning accuracy.

[0086] Deploy temperature and humidity sensors and air pressure sensors in the detection area to continuously monitor changes in temperature, humidity, and air pressure. These sensors should cover key areas to obtain comprehensive environmental data. Record the real-time changes of all environmental parameters, which will be used for subsequent environmental impact analysis and correction. Combine environmental parameters with fluorescence intensity data to establish an environmental impact correction model. The model takes into account the effects of temperature, humidity, and air pressure on the behavior of fluorescent markers, as well as potential interference with detection signals. Use the established model to dynamically adjust the fluorescence intensity readings to correct signal deviations caused by environmental factors. Through continuous monitoring and real-time correction, the system can eliminate environmental interference and maintain the accuracy of detection results.

[0087] S5: According to the positioning information and environmental parameters, the sensitivity threshold of the detection equipment is adjusted. Finally, the detection results are sent to the remote monitoring center through the wireless communication module, and updated in real time on the local display terminal.

[0088] Furthermore, the sensitivity threshold of the detection equipment is adjusted according to the positioning information and environmental parameters, including: indicating the relative distance and direction of the radiation source through the positioning information, and the environmental parameters providing the correction coefficient under real-time conditions; automatically adjusting the detection threshold according to the distance, direction and correction coefficient, and the threshold adjustment ensures that radioactive materials can be accurately detected in any environment.

[0089] The detection results are sent to the remote monitoring center through the wireless communication module, including: encoding the detection results of the wireless communication module into digital signals, modulating the digital signals, and adapting the wireless network protocol stack; transmitting encrypted data packets to the remote monitoring center through the antenna, and the monitoring center decodes the data packets, analyzes the detection results and displays them on the console.

[0090] In order to adjust the sensitivity threshold of the detection equipment according to the positioning information and environmental parameters, and ensure that the detection results can be received and analyzed by the remote monitoring center, the details are as follows:

[0091] Use previously acquired radioactive source location information, including relative distance and direction, to determine the extent of the radioactive source's impact on the detection equipment. Based on real-time monitoring of environmental parameters such as temperature, humidity, and air pressure, calculate the correction factor applicable to the current environmental conditions. Combine the distance and direction in the location information with the environmental parameter correction factor to automatically adjust the sensitivity threshold of the detection equipment. This adjustment ensures that the presence of radioactive materials can be accurately identified and quantified even in harsh or changing environments.

[0092] The detection results are converted into digital signals, and appropriate coding techniques (such as Manchester coding) are used to enhance the signal's anti-interference ability. Subsequently, the digital signal is modulated (such as FSK, PSK or QAM) to match the frequency and bandwidth requirements of wireless communication. Depending on the wireless network standard used (such as Wi-Fi, Bluetooth, LoRaWAN or proprietary protocol), the signal format is adjusted to ensure compatibility with the protocol stack and achieve efficient data transmission.

[0093] The data packet is encrypted using an encryption algorithm to ensure data security during transmission. The encrypted data packet is sent to the remote monitoring center through the antenna. After receiving the data packet, the remote monitoring center first decrypts the data packet and then restores the original detection result according to the corresponding decoding rules. The parsed data is displayed on the console or monitoring software interface for real-time monitoring and analysis by the operator.

[0094] Through the above steps, not only can the performance of the detection equipment be intelligently adjusted according to actual conditions, but the detection results can also be safely and quickly transmitted to the remote monitoring center, ensuring the reliability and efficiency of the system.

[0095] In summary, the present invention achieves high-precision and rapid detection and positioning of radioactive materials by utilizing light of a specific frequency to excite fluorescent markers, combined with advanced signal processing technology and environmental parameter correction. This method significantly improves the sensitivity and selectivity of detection, shortens the response time, enhances reliability in complex environments, and ensures real-time transmission of data, thereby greatly improving the safety management level and emergency response capabilities of nuclear power plants.

[0096] Embodiment 3, an embodiment of the present invention, is different from the first two embodiments in that:

[0097] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0098] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0099] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0100] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0101] Example 4: This example designs a highly sensitive rapid detection system for radioactive material leakage, and verifies the innovation and advantages of the system in practical applications through experimental data. The experiment uses a laser light source of a specific frequency to excite fluorescent markers in the air or surface samples in the detection area. The fluorescent markers selectively combine with specific radioactive materials (such as cesium-137 and uranium-235), thereby realizing the detection of radioactive materials.

[0102] At the beginning of the experiment, a high-stability, narrow-linewidth laser with a wavelength that matches the absorption spectrum of the fluorescent marker is used to form a high-density beam through a focusing lens to accurately illuminate the air sample in the area to be tested. After excitation, the fluorescent marker enters an excited state and releases a characteristic fluorescent signal. The signal is transmitted to the photomultiplier tube (PMT) through an optical fiber, filtered, amplified, and sent to the data acquisition system for further analysis.

[0103] The fluorescence lifetime is measured by time-resolved technology, and the type of radioactive material is identified by comparing it with the reference value in the preset database. To enhance the positioning accuracy, the system applies a triangulation positioning algorithm to invert the position of the radiation source through the fluorescence intensity distribution and correct it according to environmental parameters (temperature, humidity, air pressure). The ultimate goal of the experiment is to evaluate the rapidity, accuracy and reliability of the invention in detecting radioactive materials in practical applications. The experimental data are shown in Table 1.

[0104] Table 1 Experimental data table

[0105]

[0106] Through the analysis of experimental data, the present invention has significant innovation and advantages in the detection of radioactive material leakage. First, the detection sensitivity of the system exceeds 93%, and the response time is controlled within 2.7 seconds, which is significantly faster than the traditional method (usually takes tens of seconds to minutes). Especially for plutonium-239, the detection sensitivity reaches 98%, and the response time is only 2.0 seconds, showing the superior performance of the system in a specific environment.

[0107] Secondly, the triangulation positioning algorithm used by the system combined with the fluorescence intensity distribution and environmental parameter correction ensures that the positioning error is maintained within 0.5 meters, which is much lower than the 1-2 meter error range of the existing technology. For example, the positioning error of uranium-235 is only 0.4 meters, demonstrating the precise positioning capability of the invention in complex environments.

[0108] Finally, the present invention accurately measures the fluorescence lifetime through time-resolved technology, achieving accurate identification of different radioactive substances. The system can stably adapt to different environmental changes (such as temperature, humidity and air pressure) and maintain efficient detection performance, proving its robustness and adaptability in complex environments. In general, the present invention provides an innovative and efficient solution for radioactive substance leakage detection, which has broad application prospects.

[0109] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for rapid detection of radioactive material leakage, characterized in that: include: Continuously collect environmental parameters and adjust the operating state of the first object in combination with characteristic parameters of the second object; Starting the adjusted first object, stimulating the first characteristic of the second object, and collecting the first characteristic signal of the second object; transmitting the first characteristic signal of the second object to the third object and performing signal processing; performing time processing on the first characteristic signal of the second object to identify the type of the second object; The second object is positioned according to the first characteristic signal strength and dynamically regulated.

2. The method for rapid detection of radioactive substance leakage according to claim 1, characterized in that: The characteristic parameters of the second object include parameters characterizing the physical, chemical and environmental response characteristics of the second object.

3. The method for rapid detection of radioactive substance leakage according to claim 2, characterized in that: The first feature of the second object includes: The first object is used to stimulate the first characteristic of the second object, thereby generating a collectible first characteristic signal of the second object.

4. The method for rapid detection of radioactive substance leakage according to claim 3, characterized in that: The signal processing includes screening and optimizing the first characteristic signal of the second object and improving the quality of the first characteristic signal of the second object.

5. The method for rapid detection of radioactive substance leakage according to claim 4, characterized in that: The time processing of the first characteristic signal of the second object includes calculating the life span of the first characteristic signal of the second object by using a time resolution technique and generating a result of visual expression.

6. The method for rapid detection of radioactive substance leakage according to claim 5, characterized in that: The identifying the type of the second object includes, but is not limited to, comparing the result of the visual expression with a preset database, and using a decision tree model to identify the type of the second object based on the life span of the first characteristic signal of the second object and the matching degree of the preset database.

7. The method for rapid detection of radioactive substance leakage according to claim 6, characterized in that: The positioning of the second object based on the first characteristic signal strength includes but is not limited to combining the first characteristic signal strength of the second object at multiple monitoring points, using a triangulation positioning algorithm, and combining a distance model to position the second object.

8. A rapid detection system for radioactive material leakage, characterized in that: A data acquisition module continuously collects environmental parameters and adjusts the operating state of the first object in combination with characteristic parameters of the second object; an excitation module, which starts the adjusted first object, excites the first characteristic of the second object, and collects the first characteristic signal of the second object; A signal transmission module transmits the first characteristic signal of the second object to the third object and performs signal processing; an identification module, performing time processing on the first characteristic signal of the second object to identify the type of the second object; The positioning module realizes the positioning of the second object according to the strength of the first characteristic signal and performs dynamic regulation.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method for rapid detection of radioactive material leakage according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for rapid detection of radioactive substance leakage according to any one of claims 1 to 7 are implemented.

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