CN104330814B - A kind of radioactive source localization method and system - Google Patents

A kind of radioactive source localization method and system Download PDF

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Publication number
CN104330814B
CN104330814B CN201410592818.7A CN201410592818A CN104330814B CN 104330814 B CN104330814 B CN 104330814B CN 201410592818 A CN201410592818 A CN 201410592818A CN 104330814 B CN104330814 B CN 104330814B
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radioactive source
nuclear radiation
information
source
module
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CN104330814A (en
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张华�
霍建文
王坤朋
王姮
刘满禄
张静
郭江
史思总
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Southwest University of Science and Technology
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Southwest University of Science and Technology
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Abstract

The invention discloses radioactive source localization method and system, including:Initialize installation;Nuclear radiation detection is carried out to radioactive source in multiple sensing points using multiple mobile communication terminals;Obtain nuclear radiation dosage information, positional information and the temporal information of sensing point;According to nuclear radiation dosage information, judge whether to need whether alarm and radioactive source move;Fixed radioactive source and movable radiation source are positioned respectively.The portable functional such as radiological measuring and analysis is integrated into mobile communication terminal by this method, depart from traditional based on professional equipments such as electronic tag, robots, by the method for human-computer fusion under group environment, the positioning to radioactive source is realized in cost-effective manner, low cost, detection range is wide, is easy to popularization.

Description

A kind of radioactive source localization method and system
Technical field
The present invention relates to radioactive substance Detection Techniques field, and in particular to a kind of radioactive source localization method and system.
Background technology
With the fast development that nuclear energy exploitation is comprehensively utilized with nuclear technology, relate to nuclear facilities, relate to core industry and crowd increasingly Many, nuclear emergency, core are retired, nuclear safety and nuclear defence more show important;By in the end of the year 2014, more than 500, whole world reactor, have 123 run times are more than 30 years, 12 more than 40 years;Meanwhile, China now there are about radio isotope and radiotechnology application All kinds of radioactive source 7-8 more than ten thousand pieces, wherein, useless source there are about 2.5 ten thousand pieces, about more than 2000 pieces of " lost contact orphan source ", due to economic bar Part limit and nuclear know-how the reason such as popularization, it is impossible to every citizen is equipped with the professional nuclear radiation detector of costliness, and transition Ionising radiation the mankind are had with fatal harm, therefore when radioactive nucleus leakage or radioactive sources lost, potential hazard constantly expands When big, the public's often outbreak.After domestic somewhere radioactive sources lost in 2014, being picked up by citizen causes body By radiation injury, social outbreak, the work of relevant speciality unit also lacks timely and effectively support facility;Therefore, how Allow numerous citizens to know that the overdose rate of radioactive ray is present, and understand that oneself is irradiated tired from the angle of health care The situation of product dosage, the radiation protection level under lifting group guard and control, is problem demanding prompt solution.
At present, the radioactive source detection of domestic and international market can substantially be divided into the monitoring of known radioactive source, determine with positioner Detection and the class of positioner two of position, tracks of device and unknown source;Patent such as Application No. 200810056795.2 is related to Device, this kind of device needs to install the positioning terminal of the active archive information of solidification on radioactive source, such as RFID, GSM card etc., source information is read by front end reader, is then positioned by technologies such as radio communication, GPS locations;Obviously, This kind of device is not suitable for the positioning of unknown source, and has certain waste to resource;As Application No. 200810156538.6, Patent is related to a kind of movement machine that is based on to be detected and positioner that such device is utilized and is fixed in robot to unknown source The front end detecting devices such as detector, gamma camera carry out nuclear radiation detection, then carried out using technologies such as wired, radio communications Radioactive source is positioned;Such device is suitable under the conditions of the severe grade of operating environment, and for the general public, such device has volume The factor such as huge, expensive, is not easy to popularization, and detection range is limited;The patent of Application No. 20130602906.6 provides one Kind is according to crystal count in the crystal array of analogue data acquisition detector than the relation with radioactive source angle come located irradiation source; The kind equipment needs strongly professional technical staff to operate detection system, and the method error that radioactive source is positioned as manipulator Larger, equipment price is expensive, inconvenient popularization and application.
The content of the invention
The above-mentioned problems in the prior art is directed to, it is an object of the present invention to provide a kind of radioactive source positioning side Method, the method carries out real-time detection using mobile communication terminal to unknown radioactive source, the public is learnt itself suffered spoke in real time Dosage information is penetrated, makes the detection to nuclear radiation more convenient, quick, and the incidence relation between Multi-point detection information can be utilized Determine the position of unknown radioactive source and tracked.
It is a further object to provide a kind of radioactive source alignment system.
To achieve these goals, the invention provides a kind of radioactive source localization method, including:
The nucleic and early warning dosage information of Initialize installation radioactive source to be measured;
Nuclear radiation detection is carried out to radioactive source in multiple sensing points using multiple mobile communication terminals;
Obtain nuclear radiation dosage information, positional information and the temporal information of sensing point;
Compare nuclear radiation dosage information and early warning dosage information, determine whether more than early warning dose value;
If being more than early warning dose value, warning message is sent, and selected sensing point search coverage is again search coverage;
Detected at least twice again in search coverage again, according to nuclear radiation dosage information at least twice, judged radiation The property in source;
If radioactive source is fixed radioactive source, multiple core spoke is carried out in the search coverage again using multiple mobile communication terminals Detection is penetrated, according to the nuclear radiation dosage information and nuclear radiation dosage and the relation of distance of detection, fixed radioactive source is positioned;
If radioactive source is movable radiation source, multiple core spoke is carried out in the search coverage again using multiple mobile communication terminals Detection is penetrated, according to the nuclear radiation dosage information and nuclear radiation dosage information and the relation of distance of detection, movable radiation source is carried out Positioning, determines the direction of motion of movable radiation source;Meanwhile, setting to movable radiation source repeat the number of times of detection, according to obtaining The nuclear radiation dosage information of the multiple detection for taking, determines the translational speed of movable radiation source;According to the motion side of movable radiation source To and translational speed, determine the moving area of movable radiation source.
Further, fixed radioactive source is positioned and the specific steps that are positioned to movable radiation source is included:
Nuclear radiation dosage information and nuclear radiation dosage information and the relation of distance according to detection, are calculated detecting area again Each sensing point is the distance between to radioactive source in domain;Nuclear radiation dosage is with the relation of distance:
Wherein, D is nuclear radiation dosage;μenIt is the aerial mass energy absorption coefficient of nucleic;nvChanged in quality every time for nucleic hair Send the share of γ photons;ErIt is the energy of γ photons;C is the intensity of radioactive source;ρ is local atmospheric density;When T is for measurement Between;
According to the positional information of multiple sensing points in search coverage again, it is determined that the map of search coverage again;
According to map engineer's scale will each sensing point be reduced to the distance between radioactive source in search coverage again;
Respectively with each sensing point as the center of circle, A times reduce after distance for radius, circle is drawn on the map, until many Untill individual circle has common intersection point, the elements of a fix of common intersection point, the i.e. elements of a fix of radioactive source are obtained;
Wherein, one initial value of setting any to A, it is automatic to increase by one on the basis of original every time after the completion of picture circle Initial value.
Further, carrying out positioning to fixed radioactive source includes:
Primary Location and reorientation are carried out to fixed radioactive source;
Judge whether Primary Location is consistent with the elements of a fix of reorientation;
If the elements of a fix are consistent, the elements of a fix are obtained;
If the elements of a fix are inconsistent, judge the error of the elements of a fix whether less than 1%;
If error is less than 1%, the elements of a fix of fixed radioactive source are obtained;
If error is more than 1%, fixed radioactive source is positioned again, untill error is less than 1%.
Further, moving source is positioned, determines that the direction of motion of movable radiation source is specifically included:
Carry out one-time positioning and secondary positioning to movable radiation source, obtain the one-time positioning coordinate of movable radiation source and secondary The elements of a fix;
According to one-time positioning coordinate and the secondary elements of a fix, the direction of motion of movable radiation source is determined.
Further, nuclear radiation detection at least twice is carried out again in search coverage again, visited according to nuclear radiation at least twice Measurement information, judges the property of radioactive source;Specifically include step:
Nuclear radiation detection twice is carried out again in search coverage again, according to the nuclear radiation dose value P for detecting twice1、P2, judge Whether radioactive source moves;Specifically include:
Dui ∣ P1-P2Whether 1 carries out value after ∣ reservation decimal points, judge the value for obtaining more than 0;
When more than 0, radioactive source is movable radiation source;
When equal to 0, radioactive source is fixed radioactive source.
Further, the nucleic and early warning dosage information of Initialize installation radioactive source to be measured are specifically included:
Radioactive source to be measured is set for α, β or γ nucleic;
It is 15uGy/h to set the early warning dosage in safety zone.
Further, nuclear radiation detection is carried out to radioactive source in multiple sensing points using multiple mobile communication terminals specifically to wrap Include:
Nuclear radiation detection is carried out in sensing point using the nuclear radiation detector module being arranged in mobile communication terminal, is obtained Nuclear radiation signal;
The nuclear radiation signal is processed using the nuclear radiation data acquisition circuit being arranged in mobile communication terminal, Obtain the nuclear radiation dosage information of sensing point;
Obtain the positional information of sensing point respectively using the locating module and time module that are arranged in mobile communication terminal And temporal information.
In order to realize above-mentioned another purpose, the invention provides a kind of radioactive source alignment system, including:
Initialize installation module, the nucleic and early warning dosage information that radioactive source is surveyed for treating carries out Initialize installation;
Radioactive source detecting module, for carrying out nuclear radiation detection to radioactive source in multiple sensing points;
Detection information acquisition module, obtains for obtaining the radioactive source detecting module when multiple sensing points are detected Nuclear radiation dosage information, positional information and temporal information;
Comparison module, for nuclear radiation dosage information to be compared with early warning dosage information;
Selecting module, for according to the selected search coverage again of comparative result;If the nuclear radiation dosage information of certain sensing point More than early warning dosage information, it is again search coverage to select the sensing point search coverage;
Radioactive source property judge module, for carrying out nuclear radiation detection at least twice again in the search coverage again, according to Nuclear radiation dosage information at least twice, the property to radioactive source judges;
Fixed radioactive source locating module, for repeatedly being visited in search coverage again according to using multiple mobile communication terminals The nuclear radiation dosage information and nuclear radiation dosage of survey and the relation of distance, position to fixed radioactive source;
Movable radiation source is positioned and moving area determining module, for being detected again according to using multiple mobile communication terminals Region carries out the nuclear radiation dosage information and nuclear radiation dosage and the relation of distance of multiple detection, and movable radiation source is determined Position, determines the direction of motion of movable radiation source;Meanwhile, setting to movable radiation source repeat the number of times of detection, according to acquisition Multiple detection movable radiation source nuclear radiation dosage information, determine the translational speed of movable radiation source;Radiated according to mobile The direction of motion and translational speed in source, determine the moving area of movable radiation source.
Further, also including communication module, for by search coverage information again and the sensing point in search coverage again Nuclear radiation dosage information, positional information and the time information transmission obtained during detection are to radioactive source property judge module.
Further, radioactive source detecting module includes:
Nuclear radiation detector module, for carrying out nuclear radiation detection in sensing point, obtains nuclear radiation signal;
Nuclear radiation data acquisition circuit, for processing nuclear radiation signal, obtains nuclear radiation dosage information;
Locating module, positions for the positional information to sensing point, obtains the longitude and latitude information of sensing point;
Time module, for obtaining the temporal information when sensing point is detected.
Further, nuclear radiation data acquisition circuit includes:
Pre-amplifying module, the nuclear radiation signal for that will receive carries out one-level enhanced processing;
Programming amplifying module, for the signal after one-level enhanced processing to be amplified again;
Analog-to-digital conversion module, the signal from analog amount for that will amplify again changes into digital quantity, obtains nuclear radiation dosage Information.
Radioactive source localization method of the invention and system have the advantages that:
1) unknown radioactive source is detected by mobile communication terminal, realizes the radiation dose rate inspection to circumstances not known Survey, the public is learnt itself suffered radiation dose information in real time, improve the nuclear radiation protection level under group guard and control, so that Detection to nuclear radiation is more convenient, quick.
2) radioactive source is detected and is analyzed using mobile communication terminal, and skill is analyzed with big data using mobile interchange Art is analyzed to the nuclear radiation dosage information for detecting, and realizes monitoring and early warning to radioactive source and its changing condition, reaches public affairs Crowd utilizes the detections of the communicator to unknown radioactive source such as the mobile phone of high performance-price ratio, it is to avoid the injury of radioactive source Radiation On Human body, Avoid unnecessary society panic, and easy to use, low cost, it is easy to popularization.
3) nuclear radiation close rate, position, time obtained in real time in multiple sensing points using multiple mobile communication terminals etc. Information, rapidly and accurately determines the position of overdose radioactive source, and further by the growth raising positioning precision of data volume, and Give real-time tracking.
4) portable functional such as radiological measuring and analysis is integrated into mobile communication terminal by this method, departs from traditional base In professional equipments such as electronic tag, robots, by the method for human-computer fusion under group environment, realize in cost-effective manner to radiation The positioning in source, low cost, detection range is wide, is easy to popularization.
Brief description of the drawings
Fig. 1 is the flow chart of one embodiment of radioactive source localization method of the invention;
The flow chart of one embodiment that Fig. 2 is positioned for the fixed radioactive source of the application;
Fig. 3 is the Orientation on map figure of one embodiment of the unknown radioactive source of fixation of the application;
Fig. 4 is the flow chart of one embodiment of the movable radiation source positioning and moving area tracking of the application;
Fig. 5 is the Orientation on map figure of one embodiment of the movable radiation source of the application;
Fig. 6 is the structural representation of one embodiment of the application radioactive source alignment system;
Fig. 7 is the equipment drawing of the radioactive source alignment system of the application;
Fig. 8 is the structured flowchart of mobile communication terminal system.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and Corresponding accompanying drawing is clearly and completely described to technical solution of the present invention.
With reference to Fig. 1, Fig. 1 show the flow chart of one embodiment S100 of radioactive source localization method of the invention;The One embodiment S100 comprises the following steps S101 to S108;
In step S101, the nucleic of Initialize installation radioactive source to be measured is radioactive ray and early warning dosage information;
According to one embodiment of the application, nuclear radiation detection client is separately mounted to multiple mobile communication terminals In, run nuclear radiation detection client;
By the system setup module of nuclear radiation detection client, the radiation of the radioactive source to be measured of system default detection is set Property ray and safety zone in early warning dose value, and calibrate positioning and temporal information;If user skips initial setting up, system The radioactive ray of the radioactive source to be measured of default setting detection is γ, and its absorbed dose of radiation is approximately equal to dose equivalent;Pacified according to human body Total emission dosage and national radioactive radiation unitized dose amounts standard, system default set nuclear emergency practitioner, practitioner, The early warning dosage of the public is respectively 100mGy, 20mGy, 1mGy;Early warning dose value in safety zone is set as 15uGy/h;Core Be stored in the above-mentioned data for setting in the processor of mobile communication terminal by sending instruction by radiation detection client.
In step s 102, nuclear radiation detection is carried out to radioactive source in multiple sensing points using multiple mobile communication terminals;
Nuclear radiation detection is carried out in sensing point using the nuclear radiation detector module being arranged in mobile communication terminal, is obtained Nuclear radiation signal;
Nuclear radiation signal is processed using the nuclear radiation data acquisition circuit being arranged in mobile communication terminal, is obtained The nuclear radiation dosage information of sensing point;
Obtain the positional information of sensing point respectively using the locating module and time module that are arranged in mobile communication terminal And temporal information.
According to one embodiment of the application, the nuclear radiation detection of the nuclear radiation detection client of mobile communication terminal is clicked on Module, using a1, many mobile communication terminals of an b1, many sensing points of bn carry out nuclear radiation detection; Processor control nuclear radiation detector module carries out nuclear radiation detection in sensing point, obtains nuclear radiation signal, and nuclear radiation is believed Number transmit to nuclear radiation data acquisition circuit and to be processed, obtain the nuclear radiation dosage information in sensing point, and by the nuclear radiation Dosage information is transmitted to processor;Meanwhile, locating module and time module obtain geographical location information and the spy of sensing point respectively Temporal information during survey, and above- mentioned information is transmitted to processor.
According to one embodiment of the application, the specific mistake that nuclear radiation data acquisition circuit is processed nuclear radiation signal Cheng Wei:
Nuclear radiation data acquisition circuit module includes that the pre-amplifying module, programming amplifying module and the modulus that are sequentially connected turn Mold changing block;The nuclear radiation signal of radiation detector module output carries out first order enhanced processing through pre-amplifying module so that letter Number amplitude get a promotion;Signal after enhanced processing is amplified again by programming amplifying module, to meet analog-to-digital conversion The requirement of module samples resolution ratio;Signal after amplifying again, digital quantity is changed into by analog-to-digital conversion module by analog quantity, is obtained To nuclear radiation dosage information.
In step s 103, nuclear radiation dosage information, positional information and the temporal information of sensing point are obtained;
According to one embodiment of the application, processor obtain nuclear radiation data acquisition circuit nuclear radiation dosage information, The longitude and latitude information of locating module and the temporal information of time module are simultaneously stored;Meanwhile, as needed, nuclear radiation detection visitor Family end can show nuclear radiation dosage information, longitude information, latitude information and the temporal information of the sensing point being stored in processor.
In step S104, compare nuclear radiation dosage information and early warning dosage information, determine whether more than early warning dose value;
According to one embodiment of the application, the peace that processor sets this nuclear radiation dosage information for gathering with system Early warning dose value 15uGy/h in region-wide is compared.
In step S105, if being more than early warning dose value, warning message, and selected sensing point search coverage are sent to visit again Survey region;
If nuclear radiation dose value is more than 15uGy/h, there is certain radioactive source in the region, send warning message, and select the area Domain is again search coverage, notifies that corresponding personnel recede from the region;Meanwhile, processor controls transmitter module by the core of the sensing point Radiation dose information, longitude information, latitude information and temporal information are transmitted into communication module, then are transferred to service through communication module Device is stored.
In step s 106, detected at least twice again in search coverage again, according to nuclear radiation dosage at least twice Information, judges the property of radioactive source;
According to one embodiment of the application, everyone carries a mobile communication terminal to multiple nuclear emergency practitioners, Again in search coverage, the nuclear radiation dosage detecting module for clicking on the nuclear radiation detection client of mobile communication terminal carries out nuclear radiation Detection, the nuclear radiation dosage information of detection is shown by nuclear radiation detection client;Core of the nuclear emergency practitioner according to display Radiation dose information determines to enter region of the nuclear radiation dosage more than or equal to 15uGy/h again;In the region using mobile logical Letter terminal carries out nuclear radiation detection twice again, and the nuclear radiation dosage information for detecting twice is transmitted by sending module through communication module Stored to server;Server judges whether unknown radioactive source moves according to nuclear radiation dose value p1, the p2 for detecting twice It is dynamic;Detailed process is:The difference for setting p1 and p2 is p3, then p3 is asked and thoroughly deserves p4, then carry out reservation decimal to p4 The operation of the latter position of point obtains p5;If the value of p5 is more than zero, show unknown radioactive source in movement, the radioactive source is radiated for mobile Source;If the value of p5 is equal to zero, show that unknown radioactive source is not moved, the radioactive source is fixed radioactive source.
In step s 107, if radioactive source is fixed radioactive source, entered in search coverage again using multiple mobile communication terminals Row repeatedly detection, according to the nuclear radiation dosage information and nuclear radiation dosage information and the relation of distance of detection, to fixed radioactive source Positioned;
According to one embodiment of the application, repeatedly detected in search coverage again using multiple mobile communication terminals, Obtain nuclear radiation dosage information, positional information and temporal information;The above- mentioned information for getting sends through sending module, communication module The data for receiving transmission pass to server, and store in real-time data base;Server is carried out using the method for pattern-recognition Nuclide identification, and Primary Location is carried out to unknown radioactive source;According to the elements of a fix of Primary Location, the elements of a fix to core spoke are solved The distance that dosage is 15uGy/h points is penetrated, so that it is determined that safety zone;After Primary Location, nuclear emergency practitioner presses in situ one Determine beat carries out multiple nuclear radiation detection, nuclear radiation dosage information, positional information and time acquisition of information, the information for getting again Sent through sending module, the data that communication module receives transmission pass to server, and store in real-time data base;Server Above-mentioned data are processed, and method using pattern-recognition carries out nuclide identification, and unknown radioactive source is relocated; According to the elements of a fix of reorientation, reorientation coordinate to the distance that nuclear radiation dosage is 15uGy/h points is solved, so as to redefine Safety zone;According to Primary Location and the accuracy of reorientation, carry out judging whether to need to carry out nuclear radiation detection again, if Need, nuclear radiation detection is carried out again;If it is not needed, positioning is completed, fixed radioactive source is obtained according to the elements of a fix.
With reference to Fig. 2, the flow chart of one embodiment S107 that Fig. 2 is positioned for the fixed radioactive source of the application;The embodiment S107 comprises the following steps S1071 to S1075;
In step S1071, obtain search coverage again detect obtain nuclear radiation dosage information, positional information, Temporal information and temperature and actual pressure information;
According to one embodiment of the application, repeatedly detected in search coverage again using multiple mobile communication terminals, Obtain nuclear radiation dosage information, positional information and temporal information;The above- mentioned information for getting sends through sending module, communication module The data for receiving transmission pass to server, and store in real-time data base;Read the dose of radiation letter in real-time data base Breath, longitude information, latitude information and temporal information, while information inquiry and acquisition module by server, obtain and detect again The temperature and actual pressure information in region;
In step S1072, according to the nuclear radiation dosage information and nuclear radiation dosage information for obtaining and the relation of distance, count Calculation obtains again in search coverage each sensing point the distance between to radioactive source;
According to one embodiment of the application, server carries out nuclide identification using the method for pattern-recognition, concurrently sets Frame of reference D (X, Y), wherein D, X, Y represent nuclear radiation dosage, longitude information, the latitude information of certain sensing point respectively;If Fixed unknown radioactive source to the distance existed between mobile communication terminal be L, by nuclear radiation dosage D and the calculated relationship apart from L Formula, calculate b1, bn points to unknown radioactive source apart from L1, Ln;
In step S1073, Primary Location is carried out to fixed radioactive source;Specifically include following steps:
Referring to Fig. 3, Fig. 3 show the Orientation on map figure of the unknown radioactive source of fixation of the present embodiment;According to search coverage again The positional information of interior multiple sensing points, server obtains again the correlation map of search coverage, base area by map acquisition module The engineer's scale of figure L1, Ln be reduced into l1, ln;Respectively with b1, bn points as the center of circle, with L1, ln be radius in map upper drawing circle, if the n circle for drawing is without common intersection point, respectively with A times L1, ln be radius, b1, bn points be the center of circle in map upper drawing circle, until n circle have common intersection point D1 (x1, Y1 untill);Wherein, the initial value that system default sets A is 0.05, and every time after the completion of map upper drawing circle, A increases automatically 0.05;
The coordinate (x1, y1) of unknown radioactive source is obtained according to above-mentioned common intersection point D1 (x1, y1), according to coordinate (x1, y1) With the early warning dosage 15uGy/h and nuclear radiation dosage D in default safety zone and the calculation relational expression apart from L, solve not Know radioactive source to nuclear radiation dosage be 15uGy/h points apart from d;With this apart from d as radius, the coordinate points of unknown radioactive source (x1, Y1 it is) center of circle in map upper drawing circle, circle overlay area is then danger zone, enters administrative staff and withdraws, and completes Primary Location;
In step S1074, above-mentioned fixed radioactive source is relocated;Specifically include following steps:
After Primary Location, nuclear emergency practitioner in situ with 5s as time interval, visit by the multiple nuclear radiation for carrying out 5 minutes Survey, the acquisition of nuclear radiation dosage information, positional information and temporal information, the information for getting by mobile communication terminal transmission Module is transmitted, and the data that communication module receives transmission pass to server, and store in real-time data base;Read real-time Nuclear radiation close rate, longitude information, latitude information and temporal information in database, at the same by the information inquiry of server with Acquisition module, obtains the temperature and actual pressure information in search coverage again;Meanwhile, using Kalman filtering algorithm to repeatedly adopting The data of collection are filtered treatment, finally obtain the average value of the data after filtering process;Use and Primary Location identical again Method is relocated, and obtains common intersection point D2 (x2, y2);According in the elements of a fix (x2, y2) and default safety zone Early warning dosage 15uGy/h and nuclear radiation dosage D and the calculation relational expression apart from L, solve unknown radioactive source to nuclear radiation dosage It is 15uGy/h points apart from d2;Then with this apart from d2 as radius, the coordinate points D2 (x2, y2) of unknown radioactive source is the center of circle on ground Figure upper drawing circle, circle overlay area is then danger zone, then need to be withdrawn into administrative staff;
In step S1075, judge whether Primary Location and the error of reorientation are less than 1%, if error is less than 1%, obtain The elements of a fix of fixed radioactive source are taken, positioning terminates;If error is more than 1%, fixed radioactive source is positioned again, until by mistake Untill difference is less than 1%.
According to one embodiment of the application, the elements of a fix of Primary Location and the error of the elements of a fix of reorientation are judged Whether 1% is less than, specifically includes following steps:
Respectively to Primary Location with reorientation the elements of a fix longitude information x1, x2, Primary Location with relocate determine Range information d1, d2 of latitude information y1, y2 of position coordinate, Primary Location and reorientation carry out asking difference to obtain x3, y3 and d3, so X3, y3 and d3 are asked respectively afterwards and thoroughly deserves x4, y4 and d4;Be worth to q1 divided by the maximum in x1, x2 using x4, y4 divided by Maximum in y1, y2 is worth to q2, and d4 is worth to q3 divided by the maximum in d1, d2;Whether the value for comparing q1, q2, q3 is less than 1%, if being less than 1%, the longitude information and latitude information of fixed radioactive source are obtained, positioning is completed, and is obtained according to the elements of a fix Fixed radioactive source;If being more than or equal to 1%, fixed radioactive source is positioned again, untill error is less than 1%.
Wherein, it is above-mentioned during being positioned to fixed radioactive source, nuclear radiation dosage D and the calculated relationship apart from L Obtain by the following method:
The temperature and actual pressure information obtained during according to detection, the air density values of locality are calculated by formula below ρ;
Wherein, ρ represents local atmospheric density;P represents standard physical atmospheric pressure;P ' represents actual pressure;T represents temperature Degree;
Nucleic information according to nuclide identification, information inquiry and acquisition module by server obtain the nucleic in sky Mass energy absorption coefficient in gas, nucleic change in quality every time send γ composition photons share and the composition photon energy;According to Nucleic is transferred to the relation of the energy of material, can construct the absorbed dose rate formula of certain pointWherein,It is the unit time The increment of kernel dose of radiation;
Wherein, μenRepresent the aerial mass energy absorption coefficient of nucleic;nvRepresent that nucleic is changed in quality every time and send γ photons Share;ErRepresent the energy of γ photons;C represents the intensity of radioactive source;
According to the increment of unit interval kernel dose of radiationNuclear radiation dosage D can be constructed to be closed with the calculating apart from L It is formula;
Wherein, T is expressed as time of measuring.
In step S108, if radioactive source is movable radiation source, entered in search coverage again using multiple mobile communication terminals Row repeatedly detection, nuclear radiation dosage information and nuclear radiation dosage and the relation of distance according to detection, positions to moving source, Determine the direction of motion of movable radiation source;Meanwhile, setting to movable radiation source repeat the number of times of detection, many according to what is obtained The nuclear radiation dosage information of the movable radiation source of secondary detection, determines the translational speed of movable radiation source;According to movable radiation source The direction of motion and translational speed, determine the moving area of movable radiation source;
According to one embodiment of the application, repeatedly detected in search coverage again using multiple mobile communication terminals, Obtain nuclear radiation dosage information, positional information and temporal information;The above- mentioned information for getting sends through sending module, communication module The data for receiving transmission pass to server, and store in real-time data base;Server is carried out using the method for pattern-recognition Nuclide identification, and first time positioning is carried out to movable radiation source;According to the elements of a fix of first time positioning, solve the elements of a fix and arrive Nuclear radiation dosage is the distance of 15uGy/h points, so that it is determined that the safety zone of positioning for the first time;After the completion of positioning for the first time, core Emergent practitioner carries out in situ obtaining for second nuclear radiation detection, nuclear radiation dosage information, positional information and temporal information Take, the information for getting sends through sending module, the data that communication module receives transmission pass to server, and store in real time In database;Server is processed above-mentioned data, and using pattern-recognition method to carrying out nuclide identification, and to unknown Radioactive source carries out second positioning;According to second elements of a fix of positioning, solve the elements of a fix is to nuclear radiation dosage The distance of 15uGy/h points, so as to redefine safety zone;The elements of a fix and determining for positioning for the second time according to first time positioning Position coordinate, determines the direction of motion of movable radiation source;And according to for the first time and secondary nuclear radiation dosage difference and Every time of measuring, the approximate velocity of movable radiation source movement is obtained;And server settings nuclear emergency practitioner weighs in situ The number of times of multiple detection, if reaching the number of times, positioning is completed, and obtains the moving area of movable radiation source;It if is not reaching to, then It is secondary that movable radiation source is positioned, so that it is determined that the safety zone in the moving area and moving process of movable radiation source;
With reference to Fig. 4, Fig. 4 is the movable radiation source positioning and one embodiment S108 of moving area tracking of the application Flow chart;Embodiment S108 comprises the following steps S1081 to S1085;
In step S1081, obtain search coverage again detect obtain nuclear radiation dosage information, positional information, Temporal information and temperature and actual pressure information;
Repeatedly detected in search coverage again using multiple mobile communication terminals, obtained nuclear radiation dosage information, position Information and temporal information;The above- mentioned information for getting sends through sending module, and the data that communication module receives transmission pass to clothes Business device, and store in real-time data base;Read real-time data base in radiation dose information, longitude information, latitude information and Temporal information, while information inquiry and acquisition module by server, obtain the temperature of search coverage again and actual pressure is believed Breath;
In step S1082, according to the nuclear radiation dosage information and nuclear radiation dosage information for obtaining and the relation of distance, count Calculation obtains again in search coverage each sensing point the distance between to radioactive source;
Server carries out nuclide identification using the method for pattern-recognition, concurrently sets frame of reference D` (X`, Y`), wherein D`, X`, Y` represent dose of radiation, longitude information, the latitude information of certain sensing point respectively;Unknown radioactive source is set to lead to mobile The distance existed between letter terminal is L`, by nuclear radiation dosage D` and the calculation relational expression apart from L`, is conversed B1, bn points to unknown radioactive source apart from L`1, L`n;
In step S1083, first time positioning is carried out to movable radiation source;Specifically include following steps:
Referring to Fig. 5, Fig. 5 show the Orientation on map figure of the unknown radioactive source of movement of the present embodiment;According to search coverage again The positional information of interior multiple sensing points, server obtains again the correlation map of search coverage, base area by map acquisition module The engineer's scale of figure L`1, L`n be reduced into l`1, l`n;Respectively with b1, bn points as the center of circle, with l `1, l`n be radius in map upper drawing circle, if the n circle for drawing is without common intersection point, respectively with A times of l` 1st, l`n be radius, b1, bn points be the center of circle in map upper drawing circle, until n circle has common intersection point D`1 (x` 1, y`1) untill;The A is a changing value, and the initial value for setting A is 0.06, and every time after the completion of map upper drawing circle, A is automatic Increase by 0.06;
The coordinate (x`1, y`1) of unknown radioactive source is obtained according to above-mentioned common intersection point D`1 (x`1, y`1), according to coordinate (x` 1, y`1) early warning dosage 15uGy/h and nuclear radiation dosage D` and in default safety zone and the calculated relationship apart from L` Formula, the unknown radioactive source of solution to close rate is 15uGy/h points apart from d`;Then with this apart from d` as radius, unknown radioactive source Coordinate points (x`1, y`1) be the center of circle in map upper drawing circle, circle overlay area is then danger zone, then need to be withdrawn into administrative staff, Complete to position for the first time;
In step S1084, second positioning is carried out to above-mentioned movable radiation source;Specifically include following steps:
After positioning for the first time, nuclear emergency practitioner carries out second nuclear radiation detection in situ, nuclear radiation dosage information, The acquisition of positional information and temporal information, the information for getting is transmitted through the sending module of mobile communication terminal, and communicate mould The data that block receives transmission pass to server, and store in real-time data base;Server is processed above-mentioned data, is adopted Nuclide identification is carried out with the method for pattern-recognition, and second positioning is carried out to unknown radioactive source, obtain determining for second positioning Position coordinate is D`2 (x`2, y`2);According to second elements of a fix of positioning, solve the elements of a fix is to nuclear radiation dosage The distance of 15uGy/h points, so as to redefine safety zone;
In step S1085, according to first time positioning and second elements of a fix of positioning, the fortune of movable radiation source is determined Dynamic direction and substantially translational speed;
According to one embodiment of the application, the elements of a fix and second positioning of positioning according to first time positioning are sat Mark, determines the direction of motion of movable radiation source, and detect according to the difference of nuclear radiation dosage D`1 and D`2 twice and twice Time interval, ask for the movable radiation source movement approximate velocity;
In step S1086, the moving area of movable radiation source is determined;Specifically include following steps:
Server settings nuclear emergency practitioner repeats in situ the times N of detection, if reaching the times N, has positioned Into the moving area of acquisition movable radiation source;If being not reaching to, movable radiation source is positioned again, detected according to n times Nuclear radiation dosage, the difference and two of the nuclear radiation dosage D`1 of the detection and nuclear radiation dosage D`2 of second detection for the first time The time interval of secondary detection, asks for the approximate velocity v1 of movable radiation source movement;The nuclear radiation dosage D`2 of second detection and the The difference of the nuclear radiation dosage D`3 for detecting for three times and the time interval for detecting twice, ask for movable radiation source movement substantially Speed v2;···;Nuclear radiation dosage D` (N-1) of (N-1) secondary detection and nuclear radiation dosage D` (N) of n-th detection Difference and the time interval for detecting twice, ask for the approximate velocity v (N-1) of movable radiation source movement;According to v1, V2, v (N-1), ask movable radiation source move speed average V and moving direction, so that it is determined that movable radiation source move Danger zone in dynamic region and moving process.
Referring to Fig. 6, Fig. 6 show the structural representation of one embodiment of the application radioactive source alignment system;The radiation Source alignment system includes Initialize installation module, and the nucleic and early warning dosage information that radioactive source is surveyed for treating carry out initialization and set Put;
Radioactive source detecting module, for carrying out nuclear radiation detection to radioactive source in multiple sensing points;
Detection information acquisition module, nuclear radiation detection is carried out for obtaining the radioactive source detecting module in multiple sensing points When the nuclear radiation dosage information, positional information and the temporal information that obtain;
Comparison module, for nuclear radiation dosage information to be compared with early warning dosage information;
Selecting module, for according to the selected search coverage again of comparative result;If the nuclear radiation dosage information of certain sensing point More than early warning dosage information, it is again search coverage to select the sensing point search coverage;
Communication module, the core spoke obtained during for search coverage information again and the sensing point in search coverage again to be detected Penetrate dosage information, positional information and time information transmission to radioactive source property judge module.
Radioactive source property judge module, for being detected at least twice again in the search coverage again, according at least two Secondary nuclear radiation dosage information, the property to radioactive source judges;
Fixed radioactive source locating module, for many according to being carried out in the search coverage again using multiple mobile communication terminals The nuclear radiation dosage information and nuclear radiation dosage of secondary detection and the relation of distance, position to the fixed radioactive source;
Movable radiation source is positioned and moving area determining module, for according to using multiple mobile communication terminals it is described again Search coverage carries out the nuclear radiation dosage information and nuclear radiation dosage and the relation of distance of multiple detection, and the moving source is carried out Positioning, determines the direction of motion of movable radiation source;Meanwhile, setting to the movable radiation source repeat the number of times of detection, root According to the nuclear radiation dosage information of the movable radiation source of the multiple detection for obtaining, the translational speed of movable radiation source is determined;According to shifting The direction of motion and translational speed of dynamic radioactive source, determine the moving area of movable radiation source.
With reference to Fig. 7, Fig. 7 is the equipment drawing of the radioactive source alignment system of the application, including several are carried out for radioactive source The mobile communication terminal of nuclear radiation detection, the communication module of information for transmitting mobile communication terminal detection and logical for receiving The information that comes of letter module transfer is simultaneously analyzed to information and processes and then realize the service that is positioned to unknown radioactive source Device;Wherein, communication module includes wire communication module and wireless communication module;Server passes through wired and wireless mode and communicates Module is connected;Server includes information inquiry and acquisition module and map acquisition module.
Referring to Fig. 8, Fig. 8 is the structured flowchart of mobile communication terminal system;Including:Radiation detector module, nuclear radiation number According to Acquisition Circuit, processor, locating module, time module, transmitter module and nuclear radiation detection client mounted therein; Radiation detector module can select diameter 2mm, length 1cm and platypelloid type Geiger counter tube or energy compensating with mica window One kind in silicon diode detector, detectable α, β, gamma-rays;Processor and nuclear radiation data acquisition circuit, locating module, Time module and transmitter module are connected, and they are controlled;Radiation detector module is connected with nuclear radiation data acquisition circuit; Locating module can obtain the positional information of point;Time module can obtain temporal information during detection;Nuclear radiation data acquisition Circuit includes the pre-amplifying module, programming amplifying module and the analog-to-digital conversion module that are sequentially connected.
It is not to this although being described in detail to specific embodiment of the invention in conjunction with specific embodiments The restriction of scope of patent protection.Within the scope of the claims, those skilled in the art is without creative work The various modifications or adjustment that can be made still are protected by this patent.

Claims (9)

1. a kind of radioactive source localization method, it is characterized in that, including:
The nucleic and early warning dosage information of Initialize installation radioactive source to be measured;
Nuclear radiation detection is carried out to radioactive source in multiple sensing points using multiple mobile communication terminals;
Obtain nuclear radiation dosage information, positional information and the temporal information of sensing point;
Compare nuclear radiation dosage information and early warning dosage information, judge whether nuclear radiation dosage information is more than early warning dose value;
If being more than early warning dose value, warning message is sent, and selected sensing point search coverage is again search coverage;
Nuclear radiation detection at least twice is carried out again in the search coverage again, according to nuclear radiation dosage information at least twice, is sentenced The property of disconnected radioactive source;
If radioactive source is fixed radioactive source, multiple nuclear radiation spy is carried out in the search coverage again using multiple mobile communication terminals Survey, according to the nuclear radiation dosage information and nuclear radiation dosage information and the relation of distance of detection, the fixed radioactive source is carried out Positioning;
If radioactive source is movable radiation source, multiple nuclear radiation spy is carried out in the search coverage again using multiple mobile communication terminals Survey, according to the nuclear radiation dosage information and nuclear radiation dosage information and the relation of distance of detection, the movable radiation source is carried out Positioning, determines the direction of motion of movable radiation source;Meanwhile, setting to the movable radiation source repeat the number of times of detection, root According to the nuclear radiation dosage information of the multiple detection for obtaining, the translational speed of movable radiation source is determined;According to the fortune of movable radiation source Dynamic direction and translational speed, determine the moving area of movable radiation source;
Described pair of fixed radioactive source is positioned and the specific steps that are positioned to movable radiation source include:
Nuclear radiation dosage information and nuclear radiation dosage information and the relation of distance according to detection, are calculated in search coverage again Each sensing point is the distance between to radioactive source;Nuclear radiation dosage information is with the relation of distance:
D = 1.7 * 10 3 * n v * C * E r * μ e n ρ * L * T
Wherein, D is nuclear radiation dosage;μenIt is the aerial mass energy absorption coefficient of nucleic;nvChange in quality transmission γ every time for nucleic The share of photon;ErIt is the energy of γ photons;C is the intensity of radioactive source;ρ is local atmospheric density;T is time of measuring;L is Unknown radioactive source is to the distance existed between mobile communication terminal;
According to the positional information of multiple sensing points in search coverage again, it is determined that the map of search coverage again;
According to map engineer's scale will each sensing point be reduced to the distance between radioactive source in search coverage again;
Respectively with each sensing point as the center of circle, A times reduce after distance for radius, circle is drawn on the map, until multiple circles Untill having common intersection point, the elements of a fix of common intersection point, the i.e. elements of a fix of radioactive source are obtained;
Wherein, one initial value of setting any to A, it is automatic to increase by one initially on the basis of original every time after the completion of picture circle Value.
2. radioactive source localization method according to claim 1, it is characterized in that:Positioning bag is carried out to the fixed radioactive source Include:
Primary Location and reorientation are carried out to the fixed radioactive source;
Judge whether Primary Location is consistent with the elements of a fix of reorientation;
If the elements of a fix are consistent, the elements of a fix are obtained;
If the elements of a fix are inconsistent, judge the error of the elements of a fix whether less than 1%;
If error is less than 1%, the elements of a fix of fixed radioactive source are obtained;
If error is more than 1%, fixed radioactive source is positioned again, untill error is less than 1%.
3. radioactive source localization method according to claim 1, it is characterized in that:It is described that the movable radiation source is determined Position, determines that the direction of motion of movable radiation source is specifically included:
One-time positioning and secondary positioning are carried out to movable radiation source, the one-time positioning coordinate and secondary positioning of movable radiation source is obtained Coordinate;
According to one-time positioning coordinate and the secondary elements of a fix, the direction of motion of movable radiation source is determined.
4. radioactive source localization method according to claim 1, it is characterized in that, at least two are carried out again in the search coverage again Secondary detection, according to nuclear radiation detection information at least twice, judges the property of radioactive source;Specifically include step:
Detected twice again in the search coverage again, according to the nuclear radiation dose value P for detecting twice1、P2, judge radioactive source Whether move;Specifically include:
Dui ∣ P1-P2Whether 1 carries out value after ∣ reservation decimal points, judge the value for obtaining more than 0;
When more than 0, radioactive source is movable radiation source;
When equal to 0, radioactive source is fixed radioactive source.
5. radioactive source localization method according to claim 1, it is characterized in that, the core of the Initialize installation radioactive source to be measured Element and early warning dosage information are specifically included:
Radioactive source to be measured is set for α, β or γ nucleic;
It is 15 μ Gy to set the early warning dosage in safety zone.
6. radioactive source localization method according to claim 1, it is characterized in that, it is described using multiple mobile communication terminals many Individual sensing point carries out nuclear radiation detection and specifically includes to radioactive source:
Nuclear radiation detection is carried out in sensing point using the nuclear radiation detector module being arranged in mobile communication terminal, core spoke is obtained Penetrate signal;
The nuclear radiation signal is processed using the nuclear radiation data acquisition circuit being arranged in mobile communication terminal, is obtained The nuclear radiation dosage information of sensing point;
Using the locating module and time module that are arranged in mobile communication terminal obtain respectively sensing point positional information and when Between information.
7. a kind of radioactive source alignment system, it is characterized in that, including:
Initialize installation module, the nucleic and early warning dosage information that radioactive source is surveyed for treating carries out Initialize installation;
Radioactive source detecting module, it is arranged in mobile communication terminal, for carrying out nuclear radiation to radioactive source in multiple sensing points Detection;
Detection information acquisition module, obtains for obtaining the radioactive source detecting module when multiple sensing points carry out nuclear radiation detection Nuclear radiation dosage information, positional information and the temporal information for arriving;
Comparison module, for nuclear radiation dosage information to be compared with early warning dosage information;
Selecting module, for according to the selected search coverage again of comparative result;If the nuclear radiation dosage information of certain sensing point is more than Early warning dosage information, it is again search coverage to select the sensing point search coverage;
Radioactive source property judge module, for carrying out nuclear radiation detection at least twice again in the search coverage again, according at least Nuclear radiation dosage information twice, the property to radioactive source judges;
Fixed radioactive source locating module, for repeatedly being visited in the search coverage again according to using multiple mobile communication terminals The nuclear radiation dosage information and nuclear radiation dosage information of survey and the relation of distance, position to the fixed radioactive source;
Movable radiation source is positioned and moving area determining module, for being detected again described according to using multiple mobile communication terminals Region carries out the nuclear radiation dosage information and nuclear radiation dosage information of multiple detection and the relation of distance, to the movable radiation source Positioned, determined the direction of motion of movable radiation source;Meanwhile, setting carries out repeating the secondary of detection to the movable radiation source Number, according to the nuclear radiation dosage information of the multiple detection for obtaining, determines the translational speed of movable radiation source;According to movable radiation source The direction of motion and translational speed, determine the moving area of movable radiation source;
Also include communication module, the core obtained during for search coverage information again and the sensing point in search coverage again to be detected Radiation dose information, positional information and time information transmission are to radioactive source property judge module.
8. radioactive source alignment system according to claim 7, it is characterized in that, the radioactive source detecting module includes:
Nuclear radiation detector module, for carrying out nuclear radiation detection in sensing point, obtains nuclear radiation signal;
Nuclear radiation data acquisition circuit, for processing the nuclear radiation signal, obtains nuclear radiation dosage information;
Locating module, positions for the positional information to sensing point, obtains the longitude and latitude information of the sensing point;
Time module, for obtaining the temporal information when sensing point is detected.
9. radioactive source alignment system according to claim 8, it is characterized in that, the nuclear radiation data acquisition circuit includes:
Pre-amplifying module, the nuclear radiation signal for that will receive carries out one-level enhanced processing;
Programming amplifying module, for the signal after one-level enhanced processing to be amplified again;
Analog-to-digital conversion module, the signal from analog amount for that will amplify again changes into digital quantity, obtains nuclear radiation dosage information.
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