A method and apparatus for measuring artificial alpha aerosol concentration

Abstract

The embodiment of the present application discloses a kind of method and device for measuring artificial alpha aerosol concentration, the contribution factor of natural alpha to artificial alpha energy region is determined by calibrating calibration sampling filter paper in the environment to be measured without containing artificial alpha aerosol, then real-time detection is carried out to test sample filter paper containing alpha aerosol sample in the environment to be measured, and the real count of artificial alpha energy region is determined by the total alpha count collected and the natural alpha count corresponding to each of the multiple natural alpha energy region intervals previously calibrated, in combination with the contribution factor of natural alpha to artificial alpha energy region in the multiple natural alpha energy region intervals previously calibrated.The method and system fully reflect the influence of radon and thorium daughter on measurement when measuring artificial alpha aerosol concentration, and deduct the count of natural alpha radioactivity signal in the collected radioactivity signal, thereby greatly improving the precision and accuracy of artificial alpha aerosol concentration measurement.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of nuclear radiation measurement, and particularly to a method and device for measuring artificial alpha aerosol concentration. BACKGROUND

[0002] Natural alpha radioactive aerosol is formed by natural radioactive nuclides in the earth's crust entering the atmosphere and combining with aerosol particles in the atmosphere, and the nuclides mainly come from the uranium and thorium decay series, and the parent nuclides are 232 Th and 238 U. 232 Th and 238 U continuously decay to generate various daughter nuclides in the decay chain, including 222 Rn and 220 Rn, which exist in the form of gas in nature, diffuse into the air and further decay to form natural alpha radioactive aerosol.

[0003] Artificial radioactive nuclides are mainly produced in the processes of mining and processing of nuclear fuel (radioactive minerals), smelting of radioactive substances, etc. Compared with natural radioactive aerosol, artificial radioactive aerosol is much more harmful to the human body. The harm lies in that aerosol containing long-lived artificial nuclides is easily inhaled into the human body to cause irreversible radiation damage.

[0004] Monitoring artificial radioactive aerosol in the environment is an important technical means for radiation protection of artificial radioactive nuclides. The methods for monitoring artificial radioactive aerosol in the environment include sampling laboratory analysis and continuous monitoring on site. Among them, the traditional sampling laboratory detection technology has good measurement accuracy. By using a large flow sampler to collect aerosol samples on site, and then performing sample radiochemical treatment and purification of radioactive nuclides in the laboratory, and finally using a spectrometer or mass spectrometer for measurement. This method can exclude the interference of natural radon thorium daughter nuclides, and the measurement data is accurate and reliable, and the detection limit is very low. However, this method is an offline measurement technology, which is time-consuming and cannot provide real-time on-site pollution information. In particular, in the case of a serious nuclear leak, it takes dozens of hours to discover the accident, which cannot discover the threat in the first time after the radioactive leak, and cannot evacuate the on-site personnel in time. Therefore, it is an urgent problem to provide a convenient and relatively accurate method for measuring artificial radioactive aerosol concentration. SUMMARY

[0005] In order to solve the technical problem of low accuracy in measuring artificial alpha aerosol in the prior art under the condition that the on-site radon concentration is high and the radon daughter nuclide interference is very serious, the present application provides a method and device for measuring artificial alpha aerosol concentration.

[0006] According to an aspect of the embodiments of the present application, there is provided a method for measuring concentration of artificial alpha aerosol, comprising:

[0007] obtaining a test sample filter paper containing alpha aerosol samples in a to-be-tested environment, wherein the alpha aerosol samples in the to-be-tested environment contain artificial alpha aerosol and natural alpha aerosol;

[0008] performing real-time detection on the test sample filter paper to collect radioactive signals of the alpha aerosol samples on the test sample filter paper;

[0009] performing signal analysis on the radioactive signals of the alpha aerosol samples on the test sample filter paper to determine energy spectrum data of the alpha aerosol samples on the test sample filter paper, wherein the energy spectrum data comprises total alpha counts and natural alpha counts corresponding to a plurality of natural alpha energy region intervals respectively, which are pre-labeled;

[0010] determining real counts of artificial alpha energy region according to contribution factors of natural alpha in the plurality of natural alpha energy region intervals to the artificial alpha energy region, the total alpha counts and the natural alpha counts corresponding to the plurality of natural alpha energy region intervals respectively, which are pre-labeled.

[0011] Optionally, the method further comprises, before obtaining the test sample filter paper containing alpha aerosol samples in a to-be-tested environment:

[0012] regarding the to-be-tested environment not containing artificial alpha aerosol as a calibration environment;

[0013] setting a suction value of a calibration sampler;

[0014] adopting a filter paper of a specified specification as a calibration sampling filter paper, and fixing the calibration sampling filter paper on the calibration sampler;

[0015] adopting the sampler to sample alpha aerosol in the calibration environment to obtain a calibration sample filter paper;

[0016] performing first round of periodical measurement on the calibration sample filter paper to obtain first round of measurement results, wherein the first round of measurement results comprise natural alpha energy region characteristic peak counts measured in each period;

[0017] dividing the natural alpha energy region into a plurality of natural alpha energy region intervals according to the first round of measurement results;

[0018] performing second round of periodical measurement on the calibration sample filter paper to obtain second round of measurement results, wherein the second round of measurement results comprise characteristic peak counts of each natural alpha energy region interval and natural alpha total counts of the natural alpha energy region measured in each period;

[0019] According to the second round of measurement results, a contribution factor of natural alpha energy region to artificial alpha energy region in each natural alpha energy region interval is calculated.

[0020] Optionally, the dividing the natural alpha energy region into a plurality of natural alpha energy region intervals according to the first round of measurement results comprises:

[0021] According to the measured natural alpha energy region characteristic peak count in each time period, a region adjacent to each characteristic peak is determined as a natural alpha energy region interval.

[0022] Optionally, according to the second round of measurement results, a contribution factor of natural alpha energy region to artificial alpha energy region in each natural alpha energy region interval is calculated, comprising:

[0023] According to the measured natural alpha count of each natural alpha energy region interval and the total natural alpha count of natural alpha energy region in each time period, a contribution factor solving equation is generated, wherein the expression of the contribution factor solving equation is:

[0024]

[0025] In the formula, C total and C i are respectively the total natural alpha count of natural alpha energy region and the characteristic peak count of the i th natural alpha energy region interval, F i is the contribution factor of the i th natural alpha energy region interval.

[0026] The plurality of contribution factor solving equations generated according to the second round of measurement results are combined to obtain a contribution factor solving equation group.

[0027] An optimal solution of the contribution factor solving equation group is solved, and the optimal solution is taken as the contribution factor of natural alpha energy region interval to artificial alpha energy region.

[0028] Optionally, the obtaining of the sample filter paper containing the alpha aerosol sample in the environment to be measured comprises:

[0029] The suction value of the calibration sampler is taken as the suction value of the test sampler.

[0030] The same filter paper as the calibration sampling filter paper is taken as the test sampling filter paper, and the test sampling filter paper is fixed on the test sampler.

[0031] The test sampler is used to sample the alpha aerosol in the environment to be measured, and the test sample filter paper is obtained.

[0032] Optionally, the natural alpha contribution factor of the pre-labeled natural alpha energy region to the artificial alpha energy region, the total alpha count and the natural alpha count of the natural alpha energy region are used to determine the artificial alpha real count of the artificial alpha energy region, wherein the calculation formula of the artificial alpha real count of the artificial alpha energy region is:

[0033]

[0034] In the formula, C Ttotal is the artificial alpha real count of the artificial alpha energy region, C total and C ni are the total alpha count and the natural alpha count of the i-th natural alpha energy region interval on the test sample filter paper, the natural alpha count of the i-th natural alpha energy region interval is the characteristic peak count, F i is the contribution factor of the i-th natural alpha energy region interval.

[0035] According to another aspect of the embodiment of the present application, a device for measuring artificial alpha aerosol concentration is provided, which comprises:

[0036] A sample collection module is configured to obtain a test sample filter paper containing alpha aerosol samples in a to-be-tested environment, wherein the alpha aerosol samples in the to-be-tested environment contain artificial alpha aerosol and natural alpha aerosol.

[0037] A data collection module is configured to perform real-time detection on the test sample filter paper and collect the radioactivity signals of the alpha aerosol samples on the test sample filter paper.

[0038] A data analysis module is configured to perform signal analysis on the radioactivity signals of the alpha aerosol samples on the test sample filter paper and determine the energy spectrum data of the alpha aerosol samples on the test sample filter paper, wherein the energy spectrum data comprises a total alpha count and natural alpha counts corresponding to a plurality of pre-labeled natural alpha energy region intervals.

[0039] A result output module is configured to determine the artificial alpha real count of the artificial alpha energy region according to the natural alpha contribution factor of the pre-labeled natural alpha energy region to the artificial alpha energy region, the total alpha count and the natural alpha counts corresponding to the plurality of pre-labeled natural alpha energy region intervals.

[0040] Optionally, the device further comprises a sample calibration module configured to determine the natural alpha contribution factor of the plurality of natural alpha energy region intervals to the artificial alpha energy region, wherein:

[0041] The to-be-tested environment not containing artificial alpha aerosol is used as a calibration environment.

[0042] The suction value of the calibration sampler is set.

[0043] The filter paper with a specified specification is used as a calibration sampling filter paper, and the calibration sampling filter paper is fixed on the calibration sampler;

[0044] The sampler is used to sample the alpha aerosol in the calibration environment to obtain a calibration sample filter paper;

[0045] The calibration sample filter paper is subjected to a first round of periodical measurement to obtain a first round of measurement results, wherein the first round of measurement results include natural alpha energy region characteristic peak counts measured in each period;

[0046] According to the first round of measurement results, the natural alpha energy region is divided into a plurality of natural alpha energy region intervals;

[0047] The calibration sample filter paper is subjected to a second round of periodical measurement to obtain a second round of measurement results, wherein the second round of measurement results include natural alpha total counts of the natural alpha energy region and characteristic peak counts of each natural alpha energy region interval measured in each period;

[0048] According to the second round of measurement results, a contribution factor of natural alpha in each natural alpha energy region interval to artificial alpha energy region is calculated.

[0049] Optionally, the sample calibration module calculates the contribution factor of natural alpha in each natural alpha energy region interval to artificial alpha energy region according to the second round of measurement results, including:

[0050] According to the natural alpha total counts of the natural alpha energy region and the characteristic peak counts of each natural alpha energy region interval measured in each period, a contribution factor solving equation is generated, wherein the expression of the contribution factor solving equation is:

[0051]

[0052] In the formula, C total and C i are the natural alpha total counts of the natural alpha energy region and the characteristic peak counts of the i-th natural alpha energy region interval measured, respectively, F i is the contribution factor of the i-th natural alpha energy region interval;

[0053] A plurality of contribution factor solving equations generated according to the second round of measurement results are combined to obtain a contribution factor solving equation set;

[0054] An optimal solution of the contribution factor solving equation set is obtained, and the optimal solution is taken as the contribution factor of natural alpha in the natural alpha energy region interval to artificial alpha energy region.

[0055] Optionally, the data processing module determines the real artificial alpha count of the artificial alpha energy region according to the contribution factor of natural alpha of the natural alpha energy region to the artificial alpha energy region, the total alpha count and the natural alpha count of the natural alpha energy region, wherein the calculation formula of the real artificial alpha count of the artificial alpha energy region is:

[0056]

[0057] wherein C Ttotal is the real artificial alpha count of the artificial alpha energy region, C total and C ni are the total alpha count of the test sample filter paper and the natural alpha count of the i-th natural alpha energy region interval respectively, the natural alpha count of the i-th natural alpha energy region interval is the characteristic peak count, F i is the contribution factor of the i-th natural alpha energy region interval.

[0058] The method and device for measuring artificial alpha aerosol concentration provided by the application determine the contribution factor of natural alpha of a plurality of natural alpha energy region intervals to the artificial alpha energy region by calibrating the calibration sample filter paper in the environment to be measured which does not contain artificial alpha aerosol, then perform real-time detection on the test sample filter paper containing the alpha aerosol sample in the environment to be measured, collect the radioactivity signal of the alpha aerosol sample on the test sample filter paper; perform signal analysis on the radioactivity signal of the alpha aerosol sample on the test sample filter paper, determine the energy spectrum data of the alpha aerosol sample on the test sample filter paper, wherein the energy spectrum data includes the total alpha count and the natural alpha count of each of the plurality of natural alpha energy region intervals which is pre-calibrated; and determine the real artificial alpha count of the artificial alpha energy region according to the contribution factor of natural alpha of the plurality of natural alpha energy region intervals which is pre-calibrated, the total alpha count and the natural alpha count of each of the plurality of natural alpha energy region intervals which is pre-calibrated. When measuring the artificial alpha aerosol concentration, the method and system fully reflect the influence of radon and thorium daughter on the measurement by the contribution factor of natural alpha of the plurality of natural alpha energy region intervals which is pre-calibrated to the artificial alpha energy region, and subtract the count of the natural alpha radioactivity signal in the collected radioactivity signal, thereby greatly improving the precision and accuracy of the artificial alpha aerosol concentration measurement. The device of the application has relatively low requirements on the use site conditions and can be used in some harsh working conditions.

[0059] The technical solutions of the application will be further described in detail below with reference to the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0060] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description thereof taken in conjunction with the accompanying drawings, in which: like reference numerals in the drawings designate like or similar elements throughout the several views. The drawings provided herein are for illustration purposes only and, therefore, the drawings are not to scale.

[0061] Figure 1 is a flowchart of a method for measuring artificial alpha aerosol concentration according to an example embodiment of the present application.

[0062] Figure 2 is a spectrum diagram according to an example embodiment of the present application;

[0063] Figure 3 is a structural diagram of a device for measuring artificial alpha aerosol concentration according to an example embodiment of the present application. DETAILED DESCRIPTION

[0064] Hereinafter, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It should be apparent to those skilled in the art that the described embodiments are merely exemplary of the application and should not be considered limiting of the scope of the application. For example, it should be appreciated that those skilled in the art can derive other embodiments from a combination of the disclosed embodiments without departing from the scope of the present application.

[0065] It should be noted that the relative arrangement of the components and steps, numerical expressions, and numerical values set forth in the examples are not limitations of the scope of the present application unless otherwise specifically indicated.

[0066] Those skilled in the art will understand that the terms "first", "second", and so on in the embodiments of the present application are merely used to distinguish different steps, devices, or modules, and do not represent any specific technical meaning, nor do they indicate a necessary logical sequence between them.

[0067] It should also be understood that "a plurality of" in the embodiments of the present application can mean two or more, and "at least one" can mean one, two, or more.

[0068] It should also be understood that, for any component, data, or structure mentioned in the embodiments of the present application, one or more can be generally understood unless specifically limited or the context gives a contrary implication.

[0069] In addition, the term "and / or" in the present application is merely a description of the association relationship between the associated objects, which means that there can be three relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in the present application generally represents an "or" relationship between the associated objects.

[0070] It should also be understood that the description of the various embodiments is intended to highlight the differences among the various embodiments and that the same or similar features can be referenced in connection with more than one embodiment. For the sake of brevity, the numerous details of construction and operation for various sizes, shapes, components, and embodiments of devices not described in detail.

[0071] It should be understood, however, that the sizes of the various portions shown in the figures are not necessarily drawn to scale.

[0072] The following description of at least one example embodiment is merely exemplary in nature and is in no way intended to limit the application or its application or uses.

[0073] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail insofar as they can be readily understood from the disclosure given herein. Where appropriate, techniques, methods, and apparatus should be considered part of the disclosure.

[0074] It should be noted that like reference numerals and letters refer to like items in the drawings and that, as such, once an item is defined in one drawing, it is not necessary to discuss it further in subsequent drawings.

[0075] Embodiments of the present application can be applied to electronic devices such as terminal devices, computer systems, servers, etc., which can operate with numerous other general purpose or special purpose computing system environments or configurations. Examples of well-known computing systems, environments, and / or configurations that can be suitable for use with electronic devices such as terminal devices, computer systems, servers, etc., include, but are not limited to, personal computers, server computers, thin clients, thick clients, hand-held or laptop devices, microprocessor-based systems, set-top boxes, programmable consumer electronics, network personal computers, minicomputers, mainframe computers, and distributed cloud computing environments that include any of the above systems or the like.

[0076] Electronic devices such as terminal devices, computer systems, servers, etc., can be described in the general context of computer system-executable instructions, such as program modules, being executed by a computer system. Generally, program modules can include routines, programs, objects, components, logic, data structures, and the like, that perform particular tasks or implement particular abstract data types. Computer systems / servers can be practiced in distributed cloud-computing environments with remote processing devices that are linked through a communications network. In a distributed cloud-computing environment, program modules can be located in local or remote computer system storage media including memory storage devices.

[0077] Example method

[0078] Figure 1 is a flowchart of a method for measuring artificial alpha aerosol concentration provided by an example embodiment of the present application. The present embodiment can be applied to electronic devices such as terminal devices, computer systems, servers, etc. Figure 1As shown, the method comprises the following steps:

[0079] At step 101, a test sample filter paper containing an α aerosol sample in a to-be-tested environment is obtained, wherein the α aerosol sample in the to-be-tested environment contains artificial α aerosol and natural α aerosol.

[0080] In this embodiment, the to-be-tested environment contains both artificial α aerosol and natural α aerosol. Considering that it is a real-time measurement, radon and thorium daughter nuclides are also included in the natural α aerosol. Since the concentration of the natural α aerosol is high, the interference with the measurement of the artificial α aerosol will be very serious. Although there is a method in the prior art that instantaneously gives a concentration value of the artificial α aerosol by sampling air at the test site and then calculating according to an embedded algorithm, the measurement precision and accuracy are low due to the limitation of the detection method.

[0081] At step 102, the test sample filter paper is detected in real time to collect a radioactivity signal of the α aerosol sample on the test sample filter paper.

[0082] In this embodiment, the device for detecting the radioactivity signal of the α aerosol sample on the test sample filter paper is not limited. Generally, a PIPS detector is used.

[0083] At step 103, the radioactivity signal of the α aerosol sample on the test sample filter paper is analyzed to determine energy spectrum data of the α aerosol sample on the test sample filter paper, wherein the energy spectrum data includes total α counts and natural α counts corresponding to a plurality of natural α energy regions respectively.

[0084] At step 104, according to a contribution factor of the plurality of natural α energy regions to the artificial α energy region, the total α counts and the natural α counts corresponding to the plurality of natural α energy regions respectively, the real artificial α counts in the artificial α energy region are determined.

[0085] Preferably, the method further comprises, before obtaining the test sample filter paper containing the α aerosol sample in the to-be-tested environment:

[0086] The to-be-tested environment not containing artificial α aerosol is set as a calibration environment;

[0087] The value of the suction speed of the calibration sampler is set;

[0088] A filter paper of a specified specification is used as a calibration sampling filter paper, and the calibration sampling filter paper is fixed on the calibration sampler;

[0089] The sampler is used to sample α aerosol in the calibration environment to obtain a calibration sample filter paper;

[0090] performing a first round of time-segmented measurement on the calibration sample filter paper to obtain a first round of measurement results, wherein the first round of measurement results comprise natural alpha energy region characteristic peak counts obtained in each time segment;

[0091] dividing the natural alpha energy region into a plurality of natural alpha energy region intervals according to the first round of measurement results;

[0092] performing a second round of time-segmented measurement on the calibration sample filter paper to obtain a second round of measurement results, wherein the second round of measurement results comprise natural alpha counts of the natural alpha energy region and characteristic peak counts of each natural alpha energy region interval obtained in each time segment;

[0093] calculating a contribution factor of natural alpha energy region to artificial alpha energy region for each natural alpha energy region interval according to the second round of measurement results.

[0094] Preferably, the dividing the natural alpha energy region into a plurality of natural alpha energy region intervals according to the first round of measurement results comprises:

[0095] determining a region adjacent to each characteristic peak as a natural alpha energy region interval according to the natural alpha energy region characteristic peak counts obtained in each time segment.

[0096] Preferably, the calculating a contribution factor of natural alpha energy region to artificial alpha energy region for each natural alpha energy region interval according to the second round of measurement results comprises:

[0097] generating a contribution factor solving equation according to the natural alpha counts of the natural alpha energy region and the characteristic peak counts of each natural alpha energy region interval obtained in each time segment, wherein the contribution factor solving equation has an expression as follows:

[0098]

[0099] wherein C total and C i are the natural alpha counts of the natural alpha energy region and the i-th natural alpha energy region interval obtained in measurement respectively, F i is the contribution factor of the i-th natural alpha energy region interval;

[0100] obtaining a contribution factor solving equation system by combining the plurality of contribution factor solving equations generated according to the second round of measurement results;

[0101] solving an optimal solution for the contribution factor solving equation system, and taking the optimal solution as the contribution factor of natural alpha energy region to artificial alpha energy region for the natural alpha energy region interval.

[0102] In the embodiment, a room in the environment to be measured that does not contain artificial alpha aerosol is selected as the calibration environment, mainly for the convenience of calculation. In the prior art, when the sample filter paper containing artificial alpha aerosol is analyzed by using a multi-channel analyzer to count alpha particles, the obtained energy spectrum diagram has a very serious tailing phenomenon. Figure 2 is an energy spectrum diagram provided by an exemplary embodiment of the present application. As shown in Figure 2 the pulse count of the natural alpha counting area and the artificial alpha counting area is not as concentrated as when alpha particles are counted in a laboratory vacuum environment, but is centered on a characteristic peak and extends to both sides. Based on the above characteristics, the characteristic peak count of the natural alpha energy area can be obtained through one round of measurement, and then the natural alpha energy area is divided into multiple intervals according to the natural alpha energy area characteristic peak count. In terms of specific division methods, the present application is not limited, but theoretically, the more intervals the division has, the more accurate the result of solving the real count of the artificial alpha energy area based on the contribution factor will be. After the natural alpha energy area intervals are divided, the second round of measurement is performed according to the same method, the contribution factor solving equation set of the present application is established, and the least square solution of the equation set can obtain the contribution factor of each natural alpha energy area. It should be noted that if a test sample filter paper containing low background artificial alpha aerosol is used for real-time detection, the contribution factor equation needs to be constructed according to the calculation formula for determining the real count of the artificial alpha energy area of the artificial alpha.

[0103] Preferably, the sample filter paper containing alpha aerosol samples in the environment to be measured comprises:

[0104] The suction value of the calibration sampler is used as the suction value of the test sampler;

[0105] The same filter paper as the calibration sampling filter paper is used as the test sampling filter paper, and the test sampling filter paper is fixed on the test sampler;

[0106] The test sampler is used to sample alpha aerosol in the environment to be measured to obtain the test sample filter paper.

[0107] In the preferred embodiment, since the same steps, environment, sampler, and filter paper as those for making the calibration sample filter paper are used, the consistency of the natural alpha radioactivity signals detected on the test sample filter paper and the calibration sample filter paper can be fully ensured.

[0108] Preferably, the real count of the artificial alpha energy area of the artificial alpha is determined according to the contribution factor of the natural alpha energy area of the natural alpha to the artificial alpha energy area of the natural alpha pre-calibrated, the total alpha count, and the natural alpha count of the natural alpha energy area, wherein the calculation formula for determining the real count of the artificial alpha energy area of the artificial alpha is:

[0109]

[0110] wherein C Ttotal is the artificial alpha true count of the artificial alpha energy region, C total and C ni are the total alpha count and the natural alpha count of the i-th natural alpha energy region interval on the test sample filter paper, respectively, F i is the contribution factor of the i-th natural alpha energy region interval.

[0111] The method for measuring artificial alpha aerosol concentration according to the preferred embodiment is used to detect the calibration sample filter paper in the environment without artificial alpha aerosol in real time, and then the energy spectrum is obtained by using a multi-channel analyzer. The natural alpha energy region is divided into multiple intervals according to the characteristic peaks of the natural alpha aerosol in the energy spectrum. The contribution factor equation of the natural alpha energy region to the artificial alpha energy region is generated based on the total natural alpha count of the natural alpha energy region and the characteristic peak count of each natural alpha energy region interval through multiple measurements, and the equation is solved to determine the contribution factor. Then, in the environment containing artificial alpha aerosol, the artificial alpha true count of the artificial alpha energy region can be calculated according to the measured total alpha count, the characteristic peak count of each natural alpha energy region, and the contribution factor of the natural alpha energy region to the artificial alpha energy region. When the artificial alpha aerosol concentration is calculated by using the above method, the artificial alpha with a small amount is avoided to be directly measured, and the natural alpha count with high concentration and easy to obtain is collected by using the multi-channel analysis, thereby effectively improving the precision and accuracy of measuring the artificial alpha aerosol concentration.

[0112] Exemplary device

[0113] Figure 3 is a structural schematic diagram of a device for measuring artificial alpha aerosol concentration provided by an exemplary embodiment of the present application. As Figure 3 shown, the device according to the present embodiment comprises:

[0114] a sample collection module 301 for obtaining a test sample filter paper containing an alpha aerosol sample in a to-be-measured environment, wherein the alpha aerosol sample in the to-be-measured environment contains artificial alpha aerosol and natural alpha aerosol;

[0115] a data collection module 302 for detecting the test sample filter paper in real time and collecting the radioactivity signal of the alpha aerosol sample on the test sample filter paper;

[0116] a data analysis module 303 for performing signal analysis on the radioactivity signal of the alpha aerosol sample on the test sample filter paper to determine the energy spectrum data of the alpha aerosol sample on the test sample filter paper, wherein the energy spectrum data comprises a total alpha count and a natural alpha count corresponding to each of a plurality of natural alpha energy region intervals pre-calibrated;

[0117] The result output module 304 is configured to determine the real artificial alpha count of the artificial alpha energy region according to the contribution factor of the natural alpha energy region interval to the artificial alpha energy region, the total alpha count, and the corresponding natural alpha count of each natural alpha energy region interval.

[0118] Preferably, the device further comprises a sample calibration module configured to determine the contribution factor of the natural alpha energy region interval to the artificial alpha energy region, wherein:

[0119] The environment to be measured, which does not contain artificial alpha aerosol, is used as a calibration environment.

[0120] The pumping speed value of the calibration sampler is set.

[0121] A filter paper of a specified specification is used as a calibration sampling filter paper, and the calibration sampling filter paper is fixed on the calibration sampler.

[0122] The sampler is used to sample the alpha aerosol in the calibration environment to obtain a calibration sample filter paper.

[0123] The calibration sample filter paper is subjected to a first round of periodical measurement to obtain a first round of measurement results, wherein the first round of measurement results include the natural alpha energy region characteristic peak count obtained in each period.

[0124] The natural alpha energy region is divided into a plurality of natural alpha energy region intervals according to the first round of measurement results.

[0125] The calibration sample filter paper is subjected to a second round of periodical measurement to obtain a second round of measurement results, wherein the second round of measurement results include the characteristic peak count of each natural alpha energy region interval and the natural alpha total count of the natural alpha energy region obtained in each period.

[0126] The contribution factor of the natural alpha energy region interval to the artificial alpha energy region is calculated according to the second round of measurement results.

[0127] Preferably, the sample calibration module divides the natural alpha energy region into a plurality of natural alpha energy region intervals according to the first round of measurement results, which comprises:

[0128] The region adjacent to each characteristic peak is determined as a natural alpha energy region interval according to the natural alpha energy region characteristic peak count obtained in each period.

[0129] Preferably, the sample calibration module calculates the contribution factor of the natural alpha energy region interval to the artificial alpha energy region according to the second round of measurement results, which comprises:

[0130] According to the characteristic peak count of each natural alpha energy region interval and the total natural alpha count of the natural alpha energy region measured in each time period, a contribution factor solving equation is generated, wherein the expression of the contribution factor solving equation is:

[0131]

[0132] wherein C total and C i are the total natural alpha count of the natural alpha energy region and the characteristic peak count of the i-th natural alpha energy region interval measured, F i is the contribution factor of the i-th natural alpha energy region interval.

[0133] A plurality of contribution factor solving equations generated according to the second round of measurement results are combined to obtain a contribution factor solving equation group.

[0134] An optimal solution of the contribution factor solving equation group is obtained, and the optimal solution is taken as the contribution factor of the natural alpha energy region interval to the artificial alpha energy region.

[0135] Preferably, the sample collection module obtains a sample filter paper containing an alpha aerosol sample in the environment to be measured, which comprises:

[0136] The suction value of the calibration sampler is taken as the suction value of the test sampler.

[0137] The same filter paper as the calibration sampling filter paper is used as the test sampling filter paper, and the test sampling filter paper is fixed on the test sampler.

[0138] The test sampler is used to sample the alpha aerosol in the environment to be measured to obtain a test sample filter paper.

[0139] Preferably, the data processing module determines the real artificial alpha count of the artificial alpha energy region according to the contribution factor of the natural alpha energy region to the artificial alpha energy region, the total alpha count and the natural alpha count of the natural alpha energy region, wherein the calculation formula for determining the real artificial alpha count of the artificial alpha energy region is:

[0140]

[0141] wherein C Ttotal is the real artificial alpha count of the artificial alpha energy region, C total and C ni are the total alpha count of the test sample filter paper and the natural alpha count of the i-th natural alpha energy region interval, the natural alpha count of the i-th natural alpha energy region interval is the characteristic peak count, and F i is the contribution factor of the i-th natural alpha energy region interval.

[0142] The device for measuring artificial alpha aerosol concentration provided by the embodiment is based on the test sample filter paper obtained from the environment to be measured, and the real count of the artificial alpha energy region is calculated by calibrating the contribution factor of the natural alpha in the natural alpha energy region to the artificial alpha energy region, using the total alpha count, the characteristic peak count of each natural alpha energy region, and the contribution factor of the natural alpha in the natural alpha energy region to the artificial alpha energy region. The steps taken by the method for measuring artificial alpha aerosol concentration provided by the embodiment are the same, and the technical effects achieved are the same. Here, no further description is given.

[0143] The basic principles of the present disclosure are described above in combination with specific embodiments, but it should be noted that the advantages, advantages, effects, etc. mentioned in the present disclosure are only examples and are not limiting, and these advantages, advantages, effects, etc. cannot be considered as the must-have of each embodiment of the present disclosure. In addition, the specific details of the above disclosure are only for the purpose of example and for the purpose of understanding, and are not limiting, and the above details do not limit the present disclosure to be implemented with the above specific details.

[0144] Each embodiment in the specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between each embodiment can be mutually referred to. For system embodiments, since they basically correspond to method embodiments, the description is relatively simple, and the relevant parts can be referred to the part of the method embodiment.

[0145] The block diagrams of the devices, apparatuses, equipment, systems involved in the present disclosure are only illustrative examples and are not intended to require or imply the connection, arrangement, configuration shown in the block diagram. As those skilled in the art will recognize, these devices, apparatuses, equipment, systems can be connected, arranged, configured in any way. Words such as "include", "contain", "have" and the like are open-ended words, which mean "including but not limited to", and can be used interchangeably. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably.

[0146] The methods and devices of the present disclosure can be implemented in many ways. For example, the methods and devices of the present disclosure can be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above order of steps for the method is only for illustration, and the steps of the method of the present disclosure are not limited to the order specifically described above, unless otherwise specifically stated. In addition, in some embodiments, the present disclosure can also be implemented as programs recorded in recording media, which include machine-readable instructions for implementing the method according to the present disclosure. Therefore, the present disclosure also covers the recording media storing the programs for executing the method according to the present disclosure.

[0147] It is also important to note that the devices, apparatuses and methods described in the disclosure can be embodied in a variety of other forms, including but not limited to a circuit, a software routine, a signal, a processor, a computer program product, a business method or any combination thereof. As used in this disclosure, the term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any implementation described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations.

[0148] The above description has been presented for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the disclosure to forms disclosed herein. Although several example aspects and embodiments have been discussed, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

Claims

1. A method of measuring artificial alpha aerosol concentration, characterized by, The method comprises: The environment to be measured without artificial alpha aerosol is taken as a calibration environment; The suction value of the calibration sampler is set; A filter paper of a specified specification is taken as a calibration sampling filter paper, and the calibration sampling filter paper is fixed on the calibration sampler; The alpha aerosol in the calibration environment is sampled by using the sampler to obtain a calibration sample filter paper; First periodical measurement is performed on the calibration sample filter paper to obtain a first measurement result, wherein the first measurement result comprises natural alpha energy region characteristic peak counts measured in each period. The natural alpha energy region is divided into a plurality of natural alpha energy region intervals according to the first measurement result. Second periodical measurement is performed on the calibration sample filter paper to obtain a second measurement result, wherein the second measurement result comprises characteristic peak counts of each natural alpha energy region interval and natural alpha total counts of the natural alpha energy region measured in each period. A contribution factor of natural alpha energy region interval to artificial alpha energy region is calculated according to the second measurement result. A test sample filter paper containing alpha aerosol samples in the environment to be measured is obtained, comprising: The suction value of the calibration sampler is taken as the suction value of the test sampler; A filter paper of the same specification as the calibration sampling filter paper is taken as a test sampling filter paper, and the test sampling filter paper is fixed on the test sampler; The alpha aerosol in the environment to be measured is sampled by using the test sampler to obtain a test sample filter paper, wherein the alpha aerosol samples in the environment to be measured contain artificial alpha aerosol and natural alpha aerosol; Real-time detection is performed on the test sample filter paper to collect radioactivity signals of the alpha aerosol samples on the test sample filter paper; Signal analysis is performed on the radioactivity signals of the alpha aerosol samples on the test sample filter paper to determine energy spectrum data of the alpha aerosol samples on the test sample filter paper, wherein the energy spectrum data comprises total alpha counts and natural alpha counts corresponding to a plurality of natural alpha energy region intervals pre-labeled respectively. According to the contribution factor of natural alpha of the plurality of natural alpha energy region intervals to artificial alpha energy region, the total alpha counts and the natural alpha counts corresponding to the plurality of natural alpha energy region intervals pre-labeled respectively, the real counts of artificial alpha energy region are determined.

2. The method of claim 1, wherein, The natural alpha energy region is divided into a plurality of natural alpha energy region intervals according to the first measurement result, comprising: According to the natural alpha energy region characteristic peak counts measured in each period, a region adjacent to each characteristic peak is determined as a natural alpha energy region interval.

3. The method of claim 1, wherein, The contribution factor of natural alpha energy region interval to artificial alpha energy region is calculated according to the second measurement result, comprising: According to the characteristic peak counts of each natural alpha energy region interval and the natural alpha total counts of the natural alpha energy region measured in each period, a contribution factor solving equation is generated, wherein the expression of the contribution factor solving equation is: ； wherein, and are the measured total natural alpha counts and the characteristic peak counts of the th natural alpha energy region, respectively, is the contribution factor of the th natural alpha energy region. A plurality of contribution factor solving equations generated according to the second measurement result are combined to obtain a contribution factor solving equation set; An optimal solution of the contribution factor solving equation set is solved, and the optimal solution is taken as the contribution factor of natural alpha energy region interval to artificial alpha energy region.

4. The method of claim 1, wherein, The contribution factor of the natural alpha energy region to the artificial alpha energy region according to the pre-marked natural alpha energy region, the total alpha count, and the corresponding natural alpha count of each of the pre-marked multiple natural alpha energy region intervals, are used to determine the real artificial alpha count of the artificial alpha energy region, wherein the calculation formula of the real artificial alpha count of the artificial alpha energy region is: wherein is the artificial alpha true count for the artificial alpha energy region, and is the total alpha count on the test sample filter paper and the natural alpha count for the first natural alpha energy region interval, respectively, the natural alpha count for the second natural alpha energy region interval is the characteristic peak count, is the contribution factor for the second natural alpha energy region interval.

5. A device for measuring artificial alpha aerosol concentration, characterized by The device comprises: A sample calibration module is configured to determine the contribution factor of the natural alpha energy region to the artificial alpha energy region, wherein: The environment to be measured without artificial alpha aerosol is used as the calibration environment; The suction value of the calibration sampler is set; A filter paper of a specified specification is used as the calibration sampling filter paper, and the calibration sampling filter paper is fixed on the calibration sampler; The sampler is used to sample the alpha aerosol in the calibration environment to obtain a calibration sample filter paper; A first round of periodical measurement is performed on the calibration sample filter paper to obtain a first round of measurement results, wherein the first round of measurement results include the natural alpha energy region characteristic peak count obtained in each period; The natural alpha energy region is divided into multiple natural alpha energy region intervals according to the first round of measurement results; A second round of periodical measurement is performed on the calibration sample filter paper to obtain a second round of measurement results, wherein the second round of measurement results include the characteristic peak count of each natural alpha energy region interval and the total natural alpha count of the natural alpha energy region obtained in each period; The contribution factor of the natural alpha energy region to the artificial alpha energy region is calculated according to the second round of measurement results; A sample collection module is configured to obtain a test sample filter paper containing alpha aerosol samples in the environment to be measured, including: The suction value of the calibration sampler is used as the suction value of the test sampler; A filter paper of the same specification as the calibration sampling filter paper is used as the test sampling filter paper, and the test sampling filter paper is fixed on the test sampler; The test sampler is used to sample the alpha aerosol in the environment to be measured to obtain a test sample filter paper, wherein the alpha aerosol samples in the environment to be measured include artificial alpha aerosol and natural alpha aerosol; A data collection module is configured to perform real-time detection on the test sample filter paper to collect the radioactivity signals of the alpha aerosol samples on the test sample filter paper; A data analysis module is configured to perform signal analysis on the radioactivity signals of the alpha aerosol samples on the test sample filter paper to determine the energy spectrum data of the alpha aerosol samples on the test sample filter paper, wherein the energy spectrum data includes the total alpha count and the corresponding natural alpha count of each of the pre-marked multiple natural alpha energy region intervals; A result output module is configured to determine the real artificial alpha count of the artificial alpha energy region according to the contribution factor of the natural alpha energy region to the artificial alpha energy region of the pre-marked multiple natural alpha energy region intervals, the total alpha count, and the corresponding natural alpha count of each of the pre-marked multiple natural alpha energy region intervals.

6. The apparatus of claim 5, wherein, The sample calibration module calculates the contribution factor of the natural alpha energy region to the artificial alpha energy region of each natural alpha energy region interval according to the second round of measurement results, including: According to the natural alpha count of each natural alpha energy region interval and the total natural alpha count of the natural alpha energy region measured in each time period, a contribution factor solving equation is generated, wherein the expression of the contribution factor solving equation is: ； wherein and are the measured total natural alpha counts and the characteristic peak counts of the th natural alpha energy region, respectively, is the contribution factor of the th natural alpha energy region; A plurality of contribution factor solving equations generated according to the second round of measurement results are combined to obtain a contribution factor solving equation group; An optimal solution of the contribution factor solving equation group is solved, and the optimal solution is taken as the contribution factor of the natural alpha energy region interval to the artificial alpha energy region.

7. The apparatus of claim 5, wherein, The result output module determines the artificial alpha real count of the artificial alpha energy region according to the contribution factor of the natural alpha energy region to the artificial alpha energy region, the total alpha count and the natural alpha count of the natural alpha energy region, wherein the calculation formula for determining the artificial alpha real count of the artificial alpha energy region is: wherein is the artificial alpha true count for the artificial alpha energy region, and is the total alpha count in the filter paper of the test sample and is the natural alpha count in the first natural alpha energy region interval, is the natural alpha count in the first natural alpha energy region interval is the characteristic peak count, is the contribution factor for the first natural alpha energy region interval.

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