A device and method for real-time identification of radioactive materials

Abstract

The invention discloses a device and method for real-time material type identification of radioactive materials. The method comprises: at least two nuclear radiation detection sensors and a main operation processor; each of the nuclear radiation detection sensors communicates with the main operation processor in a wired or wireless manner; the nuclear radiation detection sensors are installed on the outer wall of the same container in a process flow, wherein at least two of the nuclear radiation detection sensors are at different heights of the outer wall of the container, and the detection ranges overlap; the main operation processor generates relative material type data or real-time material nuclear radiation characteristic values ​​reflecting the radioactive characteristics of the material in the container based on the nuclear radiation data obtained by each of the nuclear radiation detection sensors and a preset material type algorithm based on at least two continuous material level measurement principles; the invention can efficiently and real-time generate material type data reflecting the radioactive characteristics of the material in the container, and assist an on-site non-radioactive source nuclear radiation level meter to complete the correction of material type changes.

Description

Technical Field

[0001] The invention relates to a device and a method for real-time identification of radioactive materials, belonging to the technical field of measurement of nuclear radiation level meters without radioactive sources. Background Art

[0002] The non-radioactive nuclear radiation level meter is used to measure the material level in the container in the industrial field. It has no radioactive source itself, and measures the material level by measuring the gamma rays released by the radioactive substances contained in the material. The non-radioactive nuclear radiation level meter is mainly used in thermal power plants, steel plants and other measurement scenarios where the materials in the container contain certain radioactive impurities. It is widely used because of its completely non-contact characteristics, continuous measurement and maintenance-free.

[0003] Since the non-radioactive nuclear radiation level meter essentially measures the radioactive substances contained in the material, such as the gamma rays released by elements such as radium, cesium, and uranium, and the radioactive substances contained in the material are uncertain, the content of radioactive substances in different materials, even if they come from the same mine, may not be the same. At the same time, due to the influence of the density or other characteristics of other components in the material, even if the content of radioactive substances is the same, the nuclear radiation data measured by the nuclear radiation detection sensor may be different.

[0004] Since materials at industrial sites are fluid and change very quickly, using laboratory sampling to inspect and identify the radioactive characteristics of materials is extremely time-sensitive.

[0005] The patent with publication number CN104482996A provides a real-time, online material type identification and correction system, which identifies and corrects the radioactive characteristics of materials by measuring the equal amount of materials in the container in the process flow. The most important prerequisite is whether the materials in the process flow meet the preset equal amount conditions. Only when the materials in the container meet the preset equal amount conditions each time can the material type value of the material be generated. However, in actual industrial field applications, it takes a certain amount of time or opportunity to reach the preset equal amount of material conditions. Sometimes it is necessary to set up special equipment, control instructions and material type identification and correction equipment in the process flow to cooperate. In the absence of special process flow control instructions, in the application of thermal power plants, if the dust collector hopper material is identified and measured online, it is difficult to achieve real-time identification of the material because the dust collector hopper can rarely meet the preset equal amount measurement conditions. If the equal amount condition is set too high, even if the material type data is generated, the accuracy and practicality of the data will be greatly reduced. For the online measurement and identification of the materials in the silo pump of the ash conveying system at the lower end of the dust collector hopper, the preset equal amount conditions can be significantly increased, but how to set the appropriate equal amount measurement conditions is sometimes a difficult task. If the equal amount conditions are set too low, the process speed is too high, and the identification equipment may not have time to collect. At the same time, the equal amount conditions are set too low, and the materials exceeding the equal amount will seriously affect the accuracy of the measurement. There are deficiencies in the existing technology. Summary of the invention

[0006] The technical problem to be solved by the present invention is: how to realize real-time identification of the type of material in a container.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A device for real-time identification of radioactive materials, comprising:

[0009] At least 2 nuclear radiation detection sensors and a main computing processor;

[0010] Each of the nuclear radiation detection sensors communicates signals and / or data with the main computing processor via wired or wireless means;

[0011] The nuclear radiation detection sensors are installed on the same outer wall of a container in the process flow, wherein at least two of the nuclear radiation detection sensors are at different heights on the outer wall of the container and have overlapping detection ranges;

[0012] The main operation processor generates relative material type data or real-time material nuclear radiation characteristic values ​​reflecting the radioactive characteristics of the material in the container based on the nuclear radiation data obtained by each of the nuclear radiation detection sensors and a preset material type algorithm based on at least two continuous material level measurement principles.

[0013] In the aforementioned real-time material type identification device for radioactive materials, the relative material type data is one or more of the following comparison values:

[0014] Comparison value between real-time material nuclear radiation characteristic value and reference material nuclear radiation characteristic value;

[0015] Comparison values ​​of at least two of the real-time material nuclear radiation characteristic values;

[0016] A comparison value of the real-time fill level values ​​calculated by fill level algorithms using at least two different continuous fill level measurement principles.

[0017] The aforementioned real-time material type identification device for radioactive materials, wherein the main operation processor includes the following functional modules:

[0018] Algorithm preset module: The preset algorithm includes at least:

[0019] Real-time material level algorithm 1: based on the positional relationship between the material in the container and at least two of the nuclear radiation detection sensors, a first material level value is generated in real time;

[0020] Real-time material level algorithm 2: Based on the material nuclear radiation characteristic data, the second material level value is generated in real time;

[0021] Or the preset algorithm at least includes: real-time material level algorithm 1, real-time material level algorithm 2 and material nuclear radiation characteristic algorithm; the material nuclear radiation characteristic algorithm is used to generate material nuclear radiation characteristic value; the material nuclear radiation characteristic algorithm is derived from the real-time material level algorithm 2;

[0022] Real-time measurement data acquisition module: obtains nuclear radiation data sent by each nuclear radiation detection sensor;

[0023] A first material level value generating module: based on the real-time material level algorithm 1, generating the first material level value in real time;

[0024] Material type generation module: calculates and generates the relative material type data or generates the real-time material nuclear radiation characteristic value according to a preset material type algorithm based on at least two continuous material level measurement principles.

[0025] The aforementioned real-time material type identification device for radioactive materials further includes:

[0026] Role setting module: setting the nuclear radiation detection sensor associated with each of the preset algorithms.

[0027] The aforementioned real-time material type identification device for radioactive materials further includes:

[0028] Reference material nuclear radiation characteristic value setting module: preset reference material nuclear radiation characteristic value, the reference material nuclear radiation characteristic value includes the reference full warehouse value related to the nuclear radiation detection sensor or the reference material nuclear radiation characteristic parameter related to the material.

[0029] The aforementioned real-time material type identification device for radioactive materials further includes:

[0030] Material type correction module: After the main computing processor generates relative material type data or real-time material nuclear radiation characteristic values ​​reflecting the radioactive characteristics of the material in the container, the relative material type data or real-time material nuclear radiation characteristic values ​​are sent to the non-radioactive source nuclear radiation level meter with material type correction function on other containers in the process flow through wired or wireless means;

[0031] After receiving the relative material type data or the real-time material nuclear radiation characteristic value, the non-radioactive source nuclear radiation level meter with material type correction function corrects its own measurement and generates material level data.

[0032] The aforementioned real-time material type identification device for radioactive materials further includes:

[0033] Equal-amount material type identification module: A nuclear radiation detection sensor in the real-time material type identification device for radioactive materials is defined as a limit sensor, and the nuclear radiation detection sensor on the container that is lower than the limit sensor and outside the detection range of the limit sensor is defined as a nuclear radiation measurement sensor; when the actual material level in the container reaches the preset condition of the limit sensor, the main operation processor calculates and generates the relative material type data or the nuclear radiation characteristic value of the material according to the method of equal-amount material type identification.

[0034] The aforementioned real-time material type identification device for radioactive materials, wherein the material nuclear radiation characteristic value is a numerical value reflecting the nuclear radiation characteristic of the material, and the material nuclear radiation characteristic value is a parameter related to the full warehouse value related to the nuclear radiation detection sensor or the nuclear radiation characteristic related to the material, including one or more of the gamma constant of the radioactive substance contained in the material, the nuclear radiation attenuation coefficient, the content in the material or the density of the material, and the full warehouse value refers to the nuclear radiation data obtained after the nuclear radiation detection sensor is filled with material within the measurement range.

[0035] In the aforementioned real-time material type identification device for radioactive materials, in the material type generation module, the material type algorithm includes:

[0036] Substituting the first material level value into the material nuclear radiation characteristic algorithm to calculate the real-time material nuclear radiation characteristic value;

[0037] Based on the real-time material level algorithm 2, the second material level value is calculated, and then based on the first material level value and the second material level value, the relative material type data is calculated and generated;

[0038] The relative material type data is calculated based on the real-time material nuclear radiation characteristic value and the reference material nuclear radiation characteristic value;

[0039] Based on at least two of the real-time material nuclear radiation characteristic values, the relative material type data is calculated and generated.

[0040] In the aforementioned real-time material type identification device for radioactive materials, multiple nuclear radiation detection sensors are each equipped with a fixed collimator or at least one nuclear radiation detection sensor is equipped with a variable collimator, and the main operation processor generates the first material level value in real time based on the position data of multiple nuclear radiation detection sensors, the nuclear radiation measurement data of multiple positions, or the position data of multiple positions of at least one variable collimator nuclear radiation detection sensor or the nuclear measurement data of the positions.

[0041] In the aforementioned device for real-time identification of radioactive materials, all functional modules of the main operation processor are arranged in the operation processor in the nuclear radiation detection sensor.

[0042] A real-time material type identification method comprises the following steps:

[0043] At least one set of the radioactive material real-time material type identification equipment is arranged on the outer wall of a container in the process flow, and the radioactive material real-time material type identification equipment comprises at least two of the nuclear radiation detection sensors and the main operation processor, each of the nuclear radiation detection sensors respectively communicates with the main operation processor in a wired or wireless manner for signals and / or data, and at least two of the nuclear radiation detection sensors are at different heights on the container, and their detection ranges overlap;

[0044] At least two algorithms are preset in the main operation processor, including at least: real-time material level algorithm 1: based on the position relationship between the material in the container and at least two of the nuclear radiation detection sensors, a first material level value is generated in real time; real-time material level algorithm 2: based on the nuclear radiation characteristic data of the material, a second material level value is generated in real time;

[0045] Or the preset algorithm at least includes: real-time material level algorithm 1, real-time material level algorithm 2 and material nuclear radiation characteristic algorithm; the material nuclear radiation characteristic algorithm is used to generate material nuclear radiation characteristic value; the material nuclear radiation characteristic algorithm is derived from the real-time material level algorithm 2;

[0046] The main computing processor acquires the nuclear radiation data sent by each of the nuclear radiation detection sensors;

[0047] The main operation processor generates a first material level value in real time based on the real-time material level algorithm 1;

[0048] The main operation processor calculates and generates the relative material type data, or generates the real-time material nuclear radiation characteristic value, according to the preset material type algorithm based on the at least two continuous material level measurement principles.

[0049] The aforementioned method for real-time material type identification, after the step of providing at least one set of the radioactive material real-time material type identification equipment, further comprises the following steps:

[0050] The nuclear radiation detection sensors associated with each of the preset algorithms are arranged in the main operation processor.

[0051] The aforementioned real-time material type identification method, after the step of setting at least one set of the real-time material type identification equipment for radioactive materials, generates the relative material type data, or before the step of generating the real-time material nuclear radiation characteristic value, further comprises the following steps:

[0052] The reference material nuclear radiation characteristic value is preset in the main operation processor, including the reference full warehouse value of the nuclear radiation detection sensor related to each of the preset algorithms or the material nuclear radiation characteristic data related to the material.

[0053] The aforementioned real-time material type identification method, in the step of generating the relative material type data or generating the real-time material nuclear radiation characteristic value, includes the following method:

[0054] A material species algorithm based on at least two continuous material level measurement principles is preset in the main operation processor, and the material species algorithm is: the first material level value is brought into the material nuclear radiation characteristic algorithm to calculate the real-time nuclear radiation characteristic value, or based on the real-time material level algorithm 2, the second material level value is calculated, and then based on the first material level value and the second material level value, the relative material species data is calculated and generated, or based on the real-time nuclear radiation characteristic value and the reference material nuclear radiation characteristic value, the relative material species data is calculated and generated, or based on at least 2 of the real-time nuclear radiation characteristic values, the relative material species data is calculated and generated.

[0055] In the aforementioned real-time material type identification method, at least one set of real-time material type identification equipment for radioactive materials is arranged on the outer wall of a container in the process flow, and the real-time material type identification equipment for radioactive materials uses two nuclear radiation detection sensors, denoted as nuclear radiation detection sensor S1 and nuclear radiation detection sensor S2; the two nuclear radiation detection sensors are arranged at different heights on the outer wall of the container in a height direction perpendicular to the ground, and the detection ranges of the two nuclear radiation detection sensors overlap.

[0056] In the aforementioned real-time material type identification method, in the step of generating the first material level value in real time based on the real-time material level algorithm 1 by the main operation processor, two nuclear radiation detection sensors are used to calculate the first material level value, the connection line of the two nuclear radiation detection sensors is perpendicular to the ground, the horizontal interval between the two nuclear radiation detection sensors and the material is d, the vertical height difference between the material and the nuclear radiation detection sensor S1 is x, the height difference between the bottom of the container and the nuclear radiation detection sensor S1 is H, and the first material level value of the material is L1; during the measurement process, the distance between the nuclear radiation detection sensor S1 and the nuclear radiation detection sensor S2 is a constant value a, and the calculation process of generating the first material level value in real time is as follows:

[0057] The changes in the measured values ​​measured by the nuclear radiation detection sensor S1 and the nuclear radiation detection sensor S2 are ΔI 1、 ΔI2, then establish a quadratic equation:

[0058] (ΔI1-ΔI2)×x 2 -2ΔI2ax-ΔI2a 2 + (ΔI1-ΔI2) × d 2 =0

[0059] A quadratic equation has two solutions x1, x 2， Where x1≤x2;

[0060] If ΔI1>ΔI2, then x=x1; if ΔI1<ΔI2, then x=x2. The vertical height difference x between the material and the nuclear radiation detection sensor S1 is the first position value of the material.

[0061] Then the first material level value is generated: L1=Hx.

[0062] In the aforementioned real-time material type identification method, in the step of setting at least one set of real-time material type identification equipment for radioactive materials on the outer wall of a container in the process flow, the three nuclear radiation detection sensors configured are denoted as nuclear radiation detection sensor S1, nuclear radiation detection sensor S2 and nuclear radiation detection sensor S3; the nuclear radiation detection sensor S1 and nuclear radiation detection sensor S2 are respectively arranged at high and low positions on one side of the container, and the nuclear radiation detection sensor S3 is arranged on the symmetrical side of the container, and the height of the nuclear radiation detection sensor S3 is the same as that of the high-position nuclear radiation detection sensor S1 on the symmetrical side; or three nuclear radiation detection sensors are respectively arranged at the upper, middle and lower positions on the same vertical line perpendicular to the ground, and the detection ranges of the three nuclear radiation detection sensors overlap.

[0063] In the aforementioned real-time material type identification method, in the step of generating the first material level value in real time based on the real-time material level algorithm 1 by the main operation processor, when three nuclear radiation detection sensors are located at the upper, middle and lower positions of the same vertical line, the real-time nuclear radiation measurement values ​​of the nuclear radiation detection sensor S1, the nuclear radiation detection sensor S2 and the nuclear radiation detection sensor S3 are I1, I2 and I3 respectively; the horizontal interval between the three nuclear radiation detection sensors and the material is d, and the vertical height difference between the material and the nuclear radiation detection sensor S1 is x; during the measurement process, the distance between the nuclear radiation detection sensor S1 and the nuclear radiation detection sensor S2 is a fixed value a, the distance between the nuclear radiation detection sensor S2 and the nuclear radiation detection sensor S3 is a fixed value a, the measured value changes measured by the nuclear radiation detection sensor S1, the nuclear radiation detection sensor S2 and the nuclear radiation detection sensor S3 are ΔI1, ΔI2 and ΔI3 respectively, the height difference between the bottom of the container and the nuclear radiation detection sensor S1 is H, and the first material level value of the material is L1, then the calculation process for generating the first material level value in real time is as follows:

[0064] Establish a linear equation of one variable:

[0065] [4aΔI2(ΔI1-ΔI2)- 2aΔI2(ΔI1-ΔI3)] x+[4ΔI2(ΔI1-ΔI2)- (ΔI1-ΔI3)ΔI2] a 2 +[(ΔI1-ΔI2) (ΔI1-ΔI3)- (ΔI1-ΔI3) (ΔI1-ΔI2)] d 2 =0;

[0066] By solving the above linear equation, the vertical height difference x between the material and the nuclear radiation detection sensor S1 is calculated, that is, the first position value of the material;

[0067] Then the first material level value is generated: L1=Hx.

[0068] The aforementioned real-time material type identification method is to configure three nuclear radiation detection sensors on a container, and generate a first material level value according to the measurement data of two of the nuclear radiation detection sensors by using the preset real-time material level algorithm one, and then generate a second material level value according to the measurement data of the third nuclear radiation detection sensor by using the preset real-time material level algorithm two; or calculate the first material level value according to the preset real-time material level algorithm one based on the measurement data of the three nuclear radiation detection sensors, and then generate the second material level value by using the measurement data of one of the nuclear radiation detection sensors and the preset real-time material level algorithm two.

[0069] In the aforementioned real-time material type identification method, in the step of generating a first material level value in real time by the main operation processor based on the real-time material level algorithm 1, the first material level value is corrected according to the following algorithm: L1=(Hx)+T, where T is the material level correction amount.

[0070] In the aforementioned real-time material type identification method, the preset real-time material level algorithm 2 is:

[0071] L2=2R×(C 测 -C 空 ) / (C 满 -C 空 ) ;

[0072] Among them, C 测 represents the measurement data of the nuclear radiation detection sensor S1 related to the real-time material level algorithm 2, C 空 represents the empty space value of the nuclear radiation detection sensor S1, C 满 represents the full-warehouse value of the nuclear radiation detection sensor S1, 2R is the range data of the nuclear radiation detection sensor S1, and L2 is the second material level value.

[0073] In the aforementioned real-time material type identification method, in the step where the main operation processor calculates and generates the relative material type data or calculates and generates the real-time material nuclear radiation characteristic value according to the preset material type algorithm based on the at least two continuous material level measurement principles, L1 is the first material level value calculated according to the real-time material level algorithm, C 实满 In order to reflect the real-time material nuclear radiation characteristic value of the material radioactive characteristics related to the nuclear radiation detection sensor S1, the process of bringing the first material level value into the real-time material level algorithm 2 to calculate the real-time material nuclear radiation characteristic value is as follows:

[0074] L1=2R×(C 测 -C 空 ) / (C 实满 -C 空 );

[0075] (C 实满 -C 空 )=2R×(C 测 -C 空 ) / L1;

[0076] C 实满 =C 空 +2R×(C 测 -C 空 ) / L1;

[0077] In the formula, C 实满It indicates that the measurement space of the nuclear radiation detection sensor S1 is filled with materials and the actual full warehouse value reached, which is the real-time material nuclear radiation characteristic value, C 测 represents the real-time measurement data of the nuclear radiation detection sensor S1, C 空 represents the empty bin data of the nuclear radiation detection sensor S1, and 2R represents the range data of the nuclear radiation detection sensor S1.

[0078] In the aforementioned real-time material type identification method, in the step where the main operation processor calculates and generates the relative material type data according to the preset material type algorithm based on the at least two continuous material level measurement principles, or calculates and generates the real-time material nuclear radiation characteristic value, L1 is the first material level value, and P is the relative material type value reflecting the material radioactive characteristics, then the process of calculating the relative material type data is as follows:

[0079] P=(C 实满 -C 空 ) / (C 基满 -C 空 )=2R×(C 测 -C 空 ) / L1×(C 基满 -C 空 ) ;

[0080] In the formula, C 实满 It indicates that the measurement space of the nuclear radiation detection sensor S1 is filled with materials and the actual full warehouse value reached, which is the real-time material nuclear radiation characteristic value, C 测 represents the real-time measurement data of the nuclear radiation detection sensor S1, C 空 represents the reference empty space data of the nuclear radiation detection sensor S1, C 基满 It represents the reference full warehouse data of the nuclear radiation detection sensor S1, which is the nuclear radiation characteristic value of the reference material, and 2R is the range data of the nuclear radiation detection sensor S1.

[0081] In the aforementioned real-time material type identification method, in the step where the main operation processor calculates and generates the relative material type data according to the preset material type algorithm based on the at least two continuous material level measurement principles, or calculates and generates the real-time material nuclear radiation characteristic value, L1-1 is the first material level value obtained by the first calculation, L1-2 is the first material level value obtained by the second calculation, and P is the relative material type value reflecting the radioactive characteristics of the material, then the process of calculating the relative material type data is as follows:

[0082] (C 实满1 -C 空 )=2R×(C 测1 -C 空 ) / L1-1;

[0083] (C 实满2 -C 空 )=2R×(C 测2 -C 空 ) / L1-2;

[0084] P=(C 实满2 -C 空 ) / (C 实满1 -C 空 )=(C 测2 -C 空 )×L1-1 / (C 测1 -C 空 )×L1-2;

[0085] In the formula, C 实满1 Obtain the first real-time material nuclear radiation characteristic value based on L1-1, C 实满2 According to the second real-time material nuclear radiation characteristic value obtained by L1-2, C 测1 The nuclear radiation detection sensor S1 first measures data, C 测2 The nuclear radiation detection sensor S1 measures data for the second time.

[0086] In the aforementioned real-time material type identification method, in the step where the main operation processor calculates and generates the relative material type data according to the preset material type algorithm based on the at least two continuous material level measurement principles, or calculates and generates the real-time material nuclear radiation characteristic value, L1 is the first material level value, L2 is the second material level value, and P is the material type value reflecting the material radioactive characteristics, then the process of calculating the relative material type data is as follows:

[0087] L1=2R×(C 测 -C 空 ) / (C 实满 -C 空 ) then (C 实满 -C 空 )=2R×(C 测 -C 空 ) / L1;

[0088] L2=2R×(C 测 -C 空 ) / (C 基满 -C 空 ) then (C 基满 -C 空 )=2R×(C 测 -C 空 ) / L2;

[0089] P=(C 实满 -C 空 ) / (C基满 -C 空 )=L2 / L1;

[0090] In the formula, C 实满 It indicates that the measurement space of the nuclear radiation detection sensor S1 is filled with materials and the actual full warehouse value reached, which is the real-time material nuclear radiation characteristic value, C 测 represents the real-time measurement data of the nuclear radiation detection sensor S1, C 空 represents the reference empty space data of the nuclear radiation detection sensor S1, C 基满 It represents the reference full warehouse data of the nuclear radiation detection sensor S1, which is the nuclear radiation characteristic value of the reference material, and 2R is the range data of the nuclear radiation detection sensor S1.

[0091] The beneficial effects achieved by the present invention are as follows: the real-time material type identification device and method of radioactive materials of the present application simultaneously uses at least two different continuous material level measurement methods without radioactive source to measure the materials in the same container at the industrial site in real time, wherein at least one continuous material level measurement method is not affected by the radioactive characteristics of the material, wherein at least one continuous material level measurement method is affected by the radioactive characteristics of the material, and through comprehensive calculations based on at least two different continuous material level measurement principle algorithms, material type data reflecting the radioactive characteristics of the material in the container are generated in real time, thereby improving the efficiency of material type identification and better meeting the requirements for identifying the radioactive characteristics of the material in the container in the industrial site and process links. BRIEF DESCRIPTION OF THE DRAWINGS

[0092] Figure 1 This is a schematic diagram of the structure of the real-time material type identification device for radioactive materials in Example 1;

[0093] Figure 2 This is a flow chart of the real-time material type identification method in Example 1;

[0094] Figure 3 This is a measurement principle diagram of the real-time material identification device for radioactive materials in Example 1;

[0095] Figure 4 This is a measurement principle diagram of the real-time material type identification equipment for radioactive materials in Example 2. DETAILED DESCRIPTION

[0096] The present invention relates to a real-time radioactive material identification device and method which is applied in the industrial field. It uses a nuclear radiation detection sensor to measure the nuclear radiation released by radioactive impurities in the material in the container, and realizes the real-time identification of the radioactive characteristics of the material in the container. The device is installed outside the container, which is a completely non-contact measurement.

[0097] Usually, there are multiple containers in the same process flow at an industrial site. The shapes of each container may be the same or different. For material conditions with the same material in all containers, or the same raw materials after being processed by different processing techniques, the radioactive characteristics of the materials in one or several containers among many containers can be identified. After obtaining the radioactive characteristic data of the materials, the material level measurement of other containers in the entire process flow can be corrected in real time and online.

[0098] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0099] The present application provides a real-time material type identification device for radioactive materials, including: at least two nuclear radiation detection sensors and a main operation processor. The nuclear radiation detection sensor is used to measure gamma rays or other forms of nuclear radiation released by radioactive substances in the environment and materials. In the field of non-radioactive nuclear radiation level meters, nuclear radiation data is usually expressed as calculated values. Each nuclear radiation detection sensor communicates signals and / or data with the main operation processor through wired or wireless means. At least two of the nuclear radiation detection sensors are installed on the outer wall of the same container in the process flow, and at least two of the nuclear radiation detection sensors installed on the outer wall of the same container are at different heights of the outer wall of the container, and the detection range must overlap.

[0100] The overlap of detection ranges is a significant distinguishing feature between the present application and the measurement method for generating material data under the preset equal amount conditions in the prior art. In the existing measurement method for generating material data under the equal amount conditions, in order to obtain effective preset equal amount material conditions in actual implementation, it is necessary to avoid the negative impact of nuclear radiation of other materials other than the equal amount materials. If the limit sensor is implemented based on nuclear radiation detection means, usually in the measurement of the preset equal amount conditions, the measurement range of the limit probe and the detection range of the nuclear radiation probe cannot overlap, and to some extent, the farther the better, because in actual measurement, the limit probe and the nuclear radiation probe will also be affected by the difference of the radioactive material contained in the material. Therefore, based on the principle of nuclear radiation, in order to achieve a more accurate preset equal amount measurement condition, the limit probe and the radiation probe must be pulled apart so that the measurement ranges of the two do not overlap, and the detection range of the limit probe is preferably outside the detection range of the radiation probe, so that it can be more accurately guaranteed that after the limit probe judges that the preset equal amount conditions have been reached, the material measured by the radiation probe does meet the preset equal amount conditions.

[0101] It should be noted that "overlap" in this application refers to partial overlap or full overlap. In this application, only when there is overlap in the detection range can the same measurement object be detected simultaneously, and the correct implementation of the measurement method of this application can be guaranteed.

[0102] The main operation processor generates relative material type data or real-time material nuclear radiation characteristic values ​​reflecting the radioactive characteristics of the material in the container in real time based on the nuclear radiation data obtained by each nuclear radiation detection sensor and a preset material type algorithm based on at least two continuous material level measurement principles.

[0103] Different from the prior art which calculates and generates material types only after reaching a preset equal amount condition, the present application generates material type data in real time during the continuous material level measurement process, and therefore has extremely high real-time characteristics.

[0104] The material type calculation and generation method of the present application is based on at least two continuous material level measurement principles, that is, the material level measurement principle of the present application is continuous material level measurement, and at least two different continuous material level measurement principles. Continuous material level measurement refers to the material level measurement that can measure the continuous evolution process of the material level in real time. For example, continuous measurement of the material height change, quantity change or space occupancy change in the container.

[0105] In actual implementation, there are many calculation methods for generating material types. In addition to direct calculation in the usual sense, calculation results can also be obtained by querying the database. The underlying algorithm principles of query calculation and direct calculation methods may be the same. Query calculation is only to simplify the calculation process, especially to reduce the difficulty of establishing algorithm models in single-chip microcomputers and other computing processors.

[0106] In this application, relative material type data or material nuclear radiation characteristic values ​​are used to reflect and express the nuclear radiation characteristics of the material in the container.

[0107] In the present application, the nuclear radiation characteristic value of a material is a physical quantity that reflects the nuclear radiation characteristic of the material. Specifically, the nuclear radiation characteristic of a material is a full warehouse value related to a nuclear radiation detection sensor or a parameter related to the nuclear radiation characteristic of the material. The full warehouse value refers to the nuclear radiation data obtained after the nuclear radiation sensor is filled with material within the measurement range. The parameters related to the nuclear radiation characteristics related to the material are physical quantities that affect the nuclear radiation characteristics of the material per unit quantity, such as the gamma ray constant of the radioactive material contained in the material, the nuclear radiation attenuation coefficient of the radioactive material, the content of the radioactive material in the material, or one or more of the density of the material. In actual implementation, multiple physical quantities related to the unit quantity that reflect the nuclear radiation characteristics of the material can be considered and applied as a whole nuclear radiation characteristic parameter.

[0108] The material nuclear radiation characteristic values ​​can be divided into real-time material nuclear radiation characteristic values ​​and reference material nuclear radiation characteristic values ​​according to different timing or purposes.

[0109] In this application, relative material type data refers to comparative data obtained through mathematical calculation for data of physical quantities of the same attribute. In this application, relative material type data can be obtained through mutual division operations, subtraction operations, or other forms of comparative calculations. In the actual implementation of this application, the relative material type data can be one or more of the following comparison values: the comparison value of the real-time material nuclear radiation characteristic value and the reference material nuclear radiation characteristic value; the comparison value of the real-time material nuclear radiation characteristic value at at least 2 different time nodes; the comparison value of the real-time material level value calculated by the material level algorithm using at least two different continuous material level measurement principles. Since the radioactive substances contained in different materials are usually expressed based on content or proportion, or the radioactive physical quantity under unit quantity, the relative material type data in this application are all based on division operations between data of the same attribute.

[0110] As shown in FIG1 , the present application also provides a device for real-time identification of radioactive materials, the main computing processor of which includes the following functional modules:

[0111] Algorithm preset module: The preset algorithm includes at least:

[0112] Real-time material level algorithm 1: Based on the positional relationship between the material in the container and at least two of the nuclear radiation detection sensors, a first material level value is generated in real time.

[0113] Real-time material level algorithm 2: Based on the material nuclear radiation characteristic data, the second material level value is generated in real time;

[0114] Or the preset algorithm at least includes: real-time material level algorithm 1, real-time material level algorithm 2 and material nuclear radiation characteristic algorithm; the material nuclear radiation characteristic algorithm is used to generate material nuclear radiation characteristic value; the material nuclear radiation characteristic algorithm is derived from the real-time material level algorithm 2;

[0115] It should also be pointed out that in this application, the measurement ranges of at least two nuclear radiation detection sensors must overlap, referring to the overlap of the measurement ranges of the nuclear radiation detection sensor that completes the real-time material level algorithm one and the nuclear radiation detection sensor that completes the real-time material level algorithm two.

[0116] Real-time measurement data acquisition module: obtains nuclear radiation data sent by each nuclear radiation detection sensor;

[0117] A first material level value generating module: based on the real-time material level algorithm 1, generating a first material level value in real time;

[0118] Material type generation module: calculates and generates the relative material type data, or calculates and generates the real-time material nuclear radiation characteristic value, according to a preset material type algorithm based on at least two continuous material level measurement principles.

[0119] No matter what kind of real-time material level algorithm 1 is used in this application, the first material level value finally generated will not change due to the change of the nuclear radiation characteristics of the radioactive material contained in the material. The subsequent part of this application will introduce several real-time material level algorithms 1 in detail. The second material level value is just the opposite, and its generation process will definitely be affected by the nuclear radiation characteristics of the radioactive material contained in the material.

[0120] In actual implementation, the real-time material level algorithm 2 can also be included in the real-time material level algorithm 1. The real-time material level algorithm 1 can be a measurement of a material using multiple nuclear radiation detection sensors at the same time, and the first material level value is obtained by comprehensive calculation using the calculation process of the real-time material level algorithm 2 including multiple nuclear radiation detection sensors, as well as the positional relationship data between each nuclear radiation detection sensor, the positional relationship data between the material and each nuclear radiation detection sensor, etc. The calculation process of obtaining the first material level value through the above calculation is the real-time material level algorithm 1. If the real-time material level algorithm 1 includes the real-time material level algorithm 2 affected by the nuclear radiation characteristics of the material, after the comprehensive calculation process combining the positional relationship data between multiple nuclear radiation detection sensors and the positional relationship data between multiple nuclear radiation detection sensors and the measured material, the first material level value finally obtained can eliminate the influence of the nuclear radiation characteristics of the material.

[0121] Because the first material level value is not affected by the nuclear radiation characteristics of the radioactive substances contained in the material, while the real-time characteristic value of the material based on the second material level value generation method will be affected, the present application can calculate the nuclear radiation characteristic value of the material or calculate the relative material species value reflecting the radioactive characteristics of the material through the interrelated calculation of two different continuous measurement principles.

[0122] In practical applications, the range that the container needs to measure is usually very large, and it is often necessary to set up multiple integrated non-radioactive nuclear radiation level meters or multi-probe non-radioactive nuclear radiation level meters to ensure the continuous level measurement of the full range or a large range of the material in the container. Therefore, in actual measurement, for cost considerations, the detection ranges of the various sub-probes of multiple integrated non-radioactive nuclear radiation level meters or multi-probe non-radioactive nuclear radiation level meters are difficult to overlap, and there may even be large measurement blind spots between each other. The real-time level algorithm 1 in this application requires that the detection ranges between the various nuclear radiation detection sensors overlap in order to calculate the first level value that is not affected by the radioactive characteristics of the material. Therefore, in actual implementation, it is basically impossible to use the measurement method of the real-time level algorithm 1 that is not affected by the radioactive characteristics of the material to continuously measure the level in the container. Usually, many of the current methods for continuous level measurement of materials in containers are based on the real-time level algorithm 2 of this application. Then the level of the material in the container generated by the existing non-radioactive nuclear radiation level meter will be affected by the radioactive characteristics of the material, and it is necessary to obtain the material type data for correction to ensure the accuracy of the measurement.

[0123] The application also provides a real-time material identification device for radioactive materials, the main computing processor of which includes:

[0124] Role setting module: setting the nuclear radiation detection sensor associated with each of the preset algorithms.

[0125] In actual implementation, it is sometimes necessary to set up nuclear radiation detection sensors associated with each preset algorithm in the main operation processor. Obviously, due to the different locations of each nuclear radiation detection sensor, the significance and role of each in the measurement will also be different, and they play different roles in each algorithm. A nuclear radiation detection sensor may play different roles in two or more algorithms. In order to save costs, the real-time material level algorithm 2 usually only needs one nuclear radiation detection sensor, and the sensor is also one of the at least two nuclear radiation detection sensors in the real-time material level algorithm 1. The program of the main operation processor obviously needs to identify and distinguish each nuclear radiation detection sensor, which can usually be identified through the communication code of the nuclear radiation detection sensor or the serial port connected or in the communication code.

[0126] The application also provides a real-time material identification device for radioactive materials, the main computing processor of which includes:

[0127] Reference material nuclear radiation characteristic value setting module: used to preset reference material nuclear radiation characteristic values. Reference material nuclear radiation characteristic values ​​include reference full warehouse values ​​related to the nuclear radiation detection sensor or reference material nuclear radiation characteristic parameters related to the material.

[0128] If the material data is calculated based on the reference data in actual implementation, the reference material nuclear radiation characteristic parameters of the material must be pre-set in the main computing processor to facilitate the subsequent calculation. Of course, sometimes there is no need for a reference value, as long as the real-time material nuclear radiation characteristic value measured in a previous time is used as the reference, or the comprehensive value of the real-time material nuclear radiation characteristic value measured multiple times after comprehensive technology can be used as the reference value.

[0129] The application also provides a real-time material identification device for radioactive materials, the main computing processor of which includes:

[0130] Material type correction module: After the main computing processor generates relative material type data or real-time material nuclear radiation characteristic values ​​reflecting the radioactive characteristics of the material in the container in real time, the relative material type data or real-time material nuclear radiation characteristic values ​​are sent to the non-radioactive source nuclear radiation level meter with material type correction function on other containers in the process flow through wired or wireless means;

[0131] After receiving the relative material type data or the real-time material nuclear radiation characteristic value, the non-radioactive nuclear radiation level meter with material type correction function corrects its own measurement to generate more accurate material level data.

[0132] After the main computing processor generates the material type data, it is necessary to send the material type data to the on-site non-radioactive nuclear radiation level meter or other remote equipment with material type correction function for them to perform material type correction or other purposes. Therefore, the main computing processor usually needs to have a material type correction function module to assist other sensors or equipment.

[0133] The application also provides a real-time material identification device for radioactive materials, the main computing processor of which includes:

[0134] Equal-amount material type identification module: A nuclear radiation detection sensor in the real-time material type identification device for radioactive materials is defined as a limit sensor, and the nuclear radiation detection sensor on the container that is lower than the limit sensor and outside the detection range of the limit sensor is defined as a nuclear radiation measurement sensor; when the actual material level in the container reaches the preset condition of the limit sensor, the main operation processor calculates and generates the relative material type data or the nuclear radiation characteristic value of the material according to the method of equal-amount material type identification.

[0135] It should be noted that, in the equal-amount material measurement method, the detection ranges of the limit sensor and the radiation sensor should not be repeated as much as possible. Therefore, in order to complete the equal-amount material measurement in the equipment at the same time, it is necessary to configure an additional limit sensor or radiation sensor in addition to the nuclear radiation detection sensor configured in this measurement method. In addition, the configured sensor can be a sensor based on the principle of collecting nuclear radiation, or other types of sensors.

[0136] Obviously, the present application may further include an equivalent measurement module under the prior art, compare the material type data generated by the present application with the material type data under the equivalent measurement conditions, and further verify the data accuracy of the two measurement methods. Of course, this will inevitably increase the configuration and overall cost of the equipment.

[0137] The application also provides a real-time material type identification device for radioactive materials, and the material type algorithm in the material type generation module in the main computing processor includes: bringing the first material level value into the algorithm of the real-time material nuclear radiation characteristic value to calculate the real-time nuclear radiation characteristic value; based on the real-time material level algorithm 2, calculating the second material level value, and then based on the first material level value and the second material level value, calculating and generating relative material type data; based on the real-time material nuclear radiation characteristic value and the reference material nuclear radiation characteristic value, calculating and generating relative material type data; based on at least 2 real-time material nuclear radiation characteristic values, calculating and generating relative material type data.

[0138] The present application also provides a real-time material type identification device for radioactive materials. Among the nuclear radiation detection sensors in the real-time material type identification device for radioactive materials, multiple nuclear radiation detection sensors are configured with fixed collimators or at least one nuclear radiation detection sensor is configured with a variable collimator. The main operation processor can generate a first material level value in real time based on the position data of multiple nuclear radiation detection sensors, nuclear radiation measurement data of multiple positions, or the position data of multiple positions of at least one variable collimator nuclear radiation detection sensor or nuclear measurement data of the position. Multiple nuclear radiation detection sensors are each configured with a collimator or at least one nuclear radiation detection sensor is configured with a movable collimator to perform continuous material level measurement and obtain the first material level value of the material in real time.

[0139] In actual implementation, the continuous material level of the material in the container can be obtained by comparison, and a large number of nuclear radiation detection sensors equipped with collimators can be used in combination. Or one or more nuclear radiation detection sensors can be configured with a deflectable collimator to achieve nuclear radiation measurement at different detection angles or different heights, thereby generating a continuous material level of the material. For example, within a certain range along the height direction of the container, 20 nuclear radiation detection sensors with collimators are set, and the acquisition angle of each nuclear radiation detection sensor is within 10 degrees in the straight line direction. By comparing the data size of all nuclear radiation detection sensors, the continuous measurement of the material level within the container can be better achieved. If one or more nuclear radiation detection sensors are equipped with a deflectable collimator or a coding plate, by comparing the size of the nuclear radiation data measured at multiple detection angles, it is also possible to measure the continuous material level of the material within a certain range. The nuclear radiation sensor equipped with the collimator can also move with the collimator to achieve comparison calculation of different heights and obtain the continuous material level of the material. The coding plate is essentially a collimator. These two measurement methods can also obtain the first material level value that is not affected by the radioactive characteristics of the material to a certain extent. However, the equipment costs of these two methods are extremely high, and the use of collimators, configuration encoding plates, etc. seriously restricts the continuous measurement range. In actual implementation, it is difficult to have an advantage.

[0140] In the main processing of a real-time radioactive material type identification device provided in the present application, the main operation processor can also be the operation processor in the nuclear radiation detection sensor.

[0141] In actual implementation, the main operation processor can be a dedicated main operation processing device or a nuclear radiation detection sensor operation processor. If the nuclear radiation detection sensor operation processor is used as the main operation processor, the nuclear radiation detection sensor operation processor is usually also used as the nuclear radiation detection sensor operation processor to complete the detection and data generation of nuclear radiation. The main operation processor function can also be used by a computer or a functional module of a cluster computer system.

[0142] The present application provides a real-time material type identification method, comprising the following steps:

[0143] At least one set of real-time material identification equipment for radioactive materials is arranged on the outer wall of a container in the process flow, and the real-time material identification equipment for radioactive materials includes at least two nuclear radiation detection sensors and a main operation processor, each nuclear radiation detection sensor communicates with the main operation processor through wired or wireless means for signal and / or data, and at least two of all the nuclear radiation detection sensors are at different heights on the container, and their detection ranges overlap;

[0144] At least two algorithms are preset in the main operation processor, including at least: real-time material level algorithm 1: based on the position relationship between the material in the container and at least two nuclear radiation detection sensors, a first material level value is generated in real time; real-time material level algorithm 2: based on the nuclear radiation characteristic data of the material, a second material level value is generated in real time;

[0145] Or the preset algorithm at least includes: real-time material level algorithm 1, real-time material level algorithm 2 and material nuclear radiation characteristic algorithm; the material nuclear radiation characteristic algorithm is used to generate material nuclear radiation characteristic value; the material nuclear radiation characteristic algorithm is derived from the real-time material level algorithm 2;

[0146] The main computing processor obtains the nuclear radiation data sent by each nuclear radiation detection sensor;

[0147] The main operation processor generates a first material level value in real time based on the real-time material level algorithm 1;

[0148] The main operation processor calculates and generates relative material type data or real-time material nuclear radiation characteristic values ​​according to a preset material type algorithm based on the at least two continuous material level measurement principles;

[0149] The relative material data is one or more of the following comparison values:

[0150] Comparison value between real-time material nuclear radiation characteristic value and reference material nuclear radiation characteristic value;

[0151] Comparison values ​​of at least two of the real-time material nuclear radiation characteristic values;

[0152] A comparison value of the real-time fill level values ​​calculated by fill level algorithms using at least two different continuous fill level measurement principles.

[0153] In actual implementation, the main operation processor can also generate nuclear radiation data based on the electrical signal related to the nuclear radiation detection sensor obtained. Because the electrical signal containing nuclear radiation information is also a form of data, this is also a method for the main operation processor to obtain the nuclear radiation data collected by the nuclear radiation detection sensor.

[0154] The present application also provides a real-time material type identification method, which, after the step of setting at least one set of the real-time material type identification device for radioactive materials, further comprises the following steps:

[0155] A nuclear radiation detection sensor associated with each preset algorithm is set in the main operation processor.

[0156] The present application also provides a real-time material type identification method, which includes the following steps after the step of setting at least one set of real-time material type identification equipment for radioactive materials or before the step of generating real-time material nuclear radiation characteristic values:

[0157] The nuclear radiation characteristic values ​​of the reference materials are preset in the main operation processor, including the reference full-bin values ​​of the nuclear radiation detection sensors related to each preset algorithm or the nuclear radiation characteristic data related to the material.

[0158] The present application also provides a real-time material type identification method, which includes the following method in the step of generating relative material type data or generating real-time material nuclear radiation characteristic values:

[0159] A material species algorithm based on at least two continuous material level measurement principles is preset in the main operation processor, and the material species algorithm is: the first material level value is brought into the material nuclear radiation characteristic algorithm to calculate the real-time nuclear radiation characteristic value, or based on the real-time material level algorithm 2, the second material level value is calculated, and then based on the first material level value and the second material level value, relative material species data is calculated and generated, or based on the real-time nuclear radiation characteristic value and the reference material nuclear radiation characteristic value, relative material species data is calculated and generated, or based on at least 2 real-time nuclear radiation characteristic values, relative material species data is calculated and generated.

[0160] The real-time material type identification method provided by this application is further described in detail below.

[0161] Example 1

[0162] As shown in FIG1 , this embodiment provides a device for real-time identification of radioactive materials, including:

[0163] 2 nuclear radiation detection sensors and main computing processor;

[0164] Each nuclear radiation detection sensor communicates signals and / or data with the main computing processor via wired or wireless means;

[0165] The nuclear radiation detection sensors are installed on the outer wall of the same container in the process flow, wherein the two nuclear radiation detection sensors are at different heights on the outer wall of the container and their detection ranges overlap;

[0166] The main operation processor generates relative material type data or real-time material nuclear radiation characteristic values ​​reflecting the radioactive characteristics of the material in the container based on the nuclear radiation data obtained by each of the nuclear radiation detection sensors and a preset material type algorithm based on at least two continuous material level measurement principles.

[0167] As shown in FIG. 2 , this embodiment provides a real-time material type identification method, comprising the following steps:

[0168] Step 1: On the outer wall of a container in the process flow, a set of real-time material type identification equipment for radioactive materials is set. The real-time material type identification equipment for radioactive materials includes two nuclear radiation detection sensors and a main operation processor. Each nuclear radiation detection sensor communicates signals and / or data with the main operation processor through wired or wireless means. Among all the nuclear radiation detection sensors, two nuclear radiation detection sensors are at different heights on the container, and their detection ranges overlap.

[0169] The real-time material type identification device of the present application is arranged on the same container at the industrial site. The real-time material type identification device of radioactive materials includes two nuclear radiation detection sensors. The real-time material type identification device of radioactive materials includes two nuclear radiation detection sensors at different heights of the same container, and their detection ranges must overlap with each other. The overlap in the present application can be partial overlap or full overlap, or the detection range of one nuclear radiation detection sensor is within the detection range of another nuclear radiation detection sensor. Because in the method of the present application, the real-time material level algorithm one and the real-time material level algorithm two are calculated based on the nuclear radiation detection data of multiple nuclear radiation detection sensors at the same time, so it is very important to know the actual detection range of each nuclear radiation detection sensor contained in the real-time material type identification device of radioactive materials.

[0170] In the identification method of the present application, the more nuclear radiation detection sensors are configured, the higher the measurement accuracy will be, and the higher the cost will be. In this embodiment, two nuclear radiation detection sensors are configured.

[0171] Since materials in industrial site containers usually move in a direction perpendicular to the ground, the material level changes from low to high, or from high to low. Therefore, as shown in Figure 3, two nuclear radiation detection sensors are used in this embodiment. The two nuclear radiation detection sensors are set at different heights on the outer wall of the container in the height direction perpendicular to the ground. The measurement performance of the nuclear radiation detection sensor at a high position is better than that of the sensor at a low position, so that the measurement range of the nuclear radiation sensor at a high position covers part or all of the detection range of the nuclear radiation detection sensor at a low position. Since the larger the detection range of the equipment, the higher the performance requirements of the equipment, the overall equipment cost can be saved.

[0172] Step 2: at least two algorithms are preset in the main operation processor, which at least include: real-time material level algorithm 1: based on the positional relationship between the material in the container and at least two of the nuclear radiation detection sensors, a first material level value is generated in real time, and real-time material level algorithm 2: based on the material nuclear radiation characteristic data, a second material level value is generated in real time; or the preset algorithms at least include: real-time material level algorithm 1, real-time material level algorithm 2 and material nuclear radiation characteristic algorithm; the material nuclear radiation characteristic algorithm is used to generate the material nuclear radiation characteristic value; the material nuclear radiation characteristic algorithm is derived from the real-time material level algorithm 2;

[0173] About real-time material level algorithm 1.

[0174] In this embodiment, the main operation processor pre-sets at least two real-time material level algorithms with different measurement principles, that is, at least two different real-time material level measurement principles are preset. Among them, there is at least one continuous material level measurement principle algorithm, that is, real-time material level algorithm 1, which is based on the positional relationship between the material and at least two nuclear radiation detection sensors to generate real-time material level values. The first material level value calculated by the real-time material level algorithm 1 is based on the positional relationship between the material and at least two nuclear radiation detection sensors at different positions. Therefore, no matter how the nuclear radiation characteristics of the material itself change, it will not affect the measured material level result. In actual calculations, the calculation of the real-time material level algorithm 1 may also involve the correction of factors affecting environmental radiation, temperature, pile attenuation, wall hanging, etc. However, its core measurement principle is based on the positional relationship between the material and at least two different nuclear radiation detection sensors, that is, the positional relationship between the material and the nuclear radiation detection sensors at different positions. The correction of the influence of environmental radiation, temperature, wall hanging, etc. is known to those skilled in the art and will not be repeated in this application.

[0175] About real-time material level algorithm 2.

[0176] Based on the nuclear radiation characteristic data of the material, a second material level value is generated in real time. The material nuclear radiation characteristic value is a numerical value reflecting the nuclear radiation characteristics of the material. The material nuclear radiation characteristic value is a parameter related to the full warehouse value of the nuclear radiation detection sensor or the nuclear radiation characteristics related to the material, such as the gamma constant of the radioactive material contained in the material, the nuclear radiation attenuation coefficient, the content in the material or the density of the material. The full warehouse value refers to the nuclear radiation data obtained after the nuclear radiation sensor is filled with material within the measurement range. It is very obvious that the calculation formula of the real-time material level algorithm 2 must include the radioactive characteristic parameters reflecting the radioactive characteristics of the material, and the real-time material level algorithm 2 must be affected by the differences in the radioactive characteristics of the material.

[0177] Real-time material level algorithm 1 is not affected by the radioactive characteristics of the material, while real-time material level algorithm 2 can be affected by the radioactive characteristics of the material, and is the core basis for this application to obtain the real-time nuclear radiation characteristic value of the material.

[0178] Usually there are two calculation methods for real-time material level algorithm 2:

[0179] 1. Based on the full warehouse value related to the nuclear radiation detection sensor, calculate the second material level value:

[0180] L2=2R×(C 测 -C 空 ) / (C 满 -C 空 )

[0181] Among them, C 测 represents the measurement data of the nuclear radiation detection sensor related to the real-time material level algorithm 2, C 空 Represents the baseline empty warehouse data of the nuclear radiation detection sensor, C 满 It represents the full warehouse value of the nuclear radiation detection sensor, 2R is the range data of the nuclear radiation detection sensor, and L2 is the second material level value.

[0182] 2. Calculate a second material level value based on parameters related to the nuclear radiation characteristics of the material and the positional relationship between the nuclear radiation sensor and the material.

[0183] The material level can be calculated based on the positional relationship between the material and a nuclear radiation detection sensor and the nuclear radiation characteristic data of the material. The calculation of the positional relationship between the material and a nuclear radiation sensor is also affected by the nuclear radiation characteristics of the material.

[0184] There are many classic nuclear radiation calculation models in practical applications, such as mathematical models: Kinger function, F function, G function and U function, etc. For example, the mathematical models in various scenarios are listed on pages 84-95 of the trial textbook for higher education "Field Theory" edited by Ma Genhe and printed and published by the Atomic Energy Press in 1995. The classic nuclear radiation model clearly describes the relationship between the measurement data of the nuclear radiation detection sensor and the material shape, the material nuclear radiation characteristic parameters and the spatial position. The above mathematical model can be easily converted into the relationship between the physical material level and the radiation value, and the material nuclear radiation characteristic value, and the calculation formula of the second algorithm for calculating the real-time material level is obtained for calculating the second material level value.

[0185] The mathematical model provided by the nuclear radiation field theory needs to know the nuclear radiation characteristic data of the material in the calculation, such as: gamma constant, nuclear radiation attenuation coefficient, content of radioactive substances, ore density, etc. In actual calculation, if the nuclear radiation characteristic data reflecting the material is known, the material level can be calculated according to the algorithm in the nuclear radiation field theory. Of course, in actual calculation, the radioactive content of the material, ore density, material coefficient, etc. can be calculated as a whole. For the reference material at the beginning, the data reflecting the radioactive characteristics of the material can be obtained by experimental methods, or the overall data reflecting the nuclear radiation characteristics of the material can be obtained by experimental means.

[0186] The radiation field based on the nuclear radiation characteristics of the material and the spatial position of the nuclear radiation detection sensor is common knowledge in the art, and various deductions and calculations can be performed based on it, which will not be elaborated here.

[0187] About the algorithm of nuclear radiation characteristics of materials.

[0188] Based on the above-mentioned real-time material level calculation method 2, the calculation formula for the material nuclear radiation characteristics can be obtained through simple deduction, such as: C 实满 =C 空 +2R×(C 测 -C 空 ) / L1.

[0189] Step 3: The main computing processor obtains the nuclear radiation data sent by each nuclear radiation detection sensor.

[0190] The nuclear radiation detection sensors at various positions on the measured container transmit signals or data with the main operation processor through cables or wireless communications. The main operation processor can also provide power for the nuclear radiation detection sensors.

[0191] The main operation processor obtains the nuclear radiation data measured by the nuclear radiation detection sensors at the above-mentioned various positions of the container. The nuclear radiation data is represented in the form of pulse counts or intensity. In this embodiment, the nuclear radiation data is represented by pulse count values.

[0192] This embodiment uses two nuclear radiation detection sensors. The real-time nuclear radiation measurement values ​​of the nuclear radiation detection sensor S1 and the nuclear radiation detection sensor S2 are I1 and I2 respectively.

[0193] Step 4: The main operation processor generates a first material level value in real time based on the real-time material level algorithm 1.

[0194] In the process of calculating the first material level value by the real-time material level algorithm, the first material level value may be calculated directly, or the first position value related to the position may be calculated first, and then the first material level value may be calculated.

[0195] The first position value is the positional relationship value between the material and one or more nuclear radiation detection sensors. In the process of calculating the first position value, it is not necessary to consider the difference in nuclear radiation released by radioactive impurities contained in different materials, that is, the first position value generated in real time will not be affected by changes in the radioactive characteristics of the material.

[0196] In actual calculations, the real-time nuclear radiation values ​​I1 and I2 can be obtained based on each nuclear radiation detection sensor to calculate the first position value of the entire material. However, during the calculation process, the influence of environmental radiation needs to be eliminated based on I1 and I2. That is, the real-time nuclear radiation value obtained by each nuclear radiation detection sensor minus the environmental radiation value (that is, the benchmark empty warehouse value) needs to be used for calculation.

[0197] The first position value can also be calculated based on the data of the incremental material. When calculating based on the data of the incremental material, the environmental radiation value (empty warehouse value) can be ignored.

[0198] The first position value calculated based on the real-time nuclear radiation value obtained by each nuclear radiation detection sensor minus the ambient radiation value is the position height of the entire material, while the first position value calculated based on the incremental material nuclear radiation value is the position height of the added material.

[0199] Since the measurement process is inevitably affected by non-material nuclear radiation in the measurement environment, it is usually necessary to eliminate environmental nuclear radiation before calculating the change in nuclear radiation of the material. In practical applications, environmental nuclear radiation is actually the nuclear radiation collected by nuclear radiation detection sensors in container warehouses, usually in C 空 To express. ΔI1=I1-C 空 , where C 空 It is the empty bin value measured by the nuclear radiation detection sensor, that is, the environmental nuclear radiation. Sometimes the change in the two measured values ​​can be used to calculate the material change, such as ΔI1=I1-C0, C0 is the change in the environmental nuclear radiation measurement value, and this calculation method can also eliminate the impact of environmental nuclear radiation.

[0200] In the preset real-time material level algorithm 1, nuclear radiation detection sensors S1 and S2 are installed on the outer wall of the cylindrical metal container respectively, the connecting line of the two nuclear radiation detection sensors is perpendicular to the ground, the horizontal interval between the two nuclear radiation detection sensors and the material is d, and the vertical height difference between the material and the nuclear radiation detection sensor S1 is x; the vertical height difference between the nuclear radiation detection sensor S1 and the bottom of the container is H; during the measurement process, the distance between the nuclear radiation detection sensor S1 and the nuclear radiation detection sensor S2 is a constant value a; the nuclear radiation detection sensor S1 and the nuclear radiation detection sensor S2 can both measure the nuclear radiation of the material, and the distances between the nuclear radiation detection sensor S1 and the nuclear radiation detection sensor S2 and the material are r1 and r2, respectively. 2，The height difference between the bottom of the container and the nuclear radiation detection sensor S1 is H, and the first material level value of the material is L1; the calculation process is as follows:

[0201] It is common sense in the field of nuclear radiation that radioactive materials emit gamma rays uniformly into space, and the nuclear radiation obtained by nuclear radiation detection sensors conforms to the inverse square law with the detection radius.

[0202] In actual implementation, the material can be regarded as a spatial geometric body, and various parameters of the radioactive substances in the material, as well as the nuclear radiation absorption of the material, can be considered for calculation. The calculation method is the various classic mathematical models in the trial textbook "Field Theory" for higher education printed and published by the Atomic Energy Press in 1995. In this application, the material is simplified to a point-like radiation source, and the absorption effect of the material and air on the nuclear radiation of the material itself is ignored. Since no matter what spatial geometric body the material is, it is composed of several point-like radiation sources, simplifying the geometry of the material to a point-like radiation source can well illustrate the principle problem.

[0203] The measurement data of nuclear radiation detection sensor S1 and nuclear radiation detection sensor S2 are used for the calculation of real-time material level algorithm 1, and the data of nuclear radiation detection sensor S1 is also used for the calculation of real-time material level algorithm 2. The area of ​​nuclear radiation collection by nuclear radiation detection sensor S1 and nuclear radiation detection sensor S2 is S, and the measured value changes of the two are ΔI respectively. 1、 ΔI2, the change in this application can be the nuclear change in a certain period of time, or the change in the measured value compared to the reference empty bin value. The change describes the change in nuclear radiation released by the material due to the change in the quantity of the material. Then:

[0204] ΔI1=M×S / 4πr1 2 ; ΔI2=M×S / 4πr2 2 , where M is the total radioactive energy of the material.

[0205] Simplifying the expression further:

[0206] Let K = M × S / 4π, K can also be seen as the overall value reflecting the radioactive characteristics of the material;

[0207] If Figure 3 It is shown that the following calculations can be performed based on trigonometric relationships:

[0208] r1 2 =K / ΔI1, r2 2 =K / ΔI2

[0209] r1 2 =d 2 +x 2 , r2 2 =d 2 +(a+x)2 =d 2 +a 2 +2ax+x 2

[0210] Since: K=r1 2 ×ΔI1,K=r2 2 ×ΔI 2， r1 2 ×ΔI1=r2 2 ×ΔI2,

[0211] Then (d 2 +x 2 )×ΔI1=(d 2 +a 2 +2ax+x 2 )×ΔI2

[0212] We get a quadratic equation:

[0213] (ΔI1-ΔI2)×x 2 -2ΔI2ax-ΔI2 a 2 + (ΔI1-ΔI2) × d 2 =0

[0214] A quadratic equation has two solutions x1, x 2， Where x1≤x2.

[0215] Since there is a physical process in which the material in the container increases from the bottom to the top, the two values ​​of x are determined based on the comparison between ΔI1 and ΔI2. If ΔI1>ΔI2, then x=x1; if ΔI1<ΔI2, then x=x2. I1 and I2 are the nuclear radiation data measured by the nuclear radiation detection sensor S1 and the nuclear radiation detection sensor S2 respectively. The vertical height difference x between the material and the nuclear radiation detection sensor S1 is the first position value.

[0216] The two solutions x1 and x2 can also be chosen based on other constraints, such as judging by the time from empty warehouse to measurement. If the time to measure the corresponding position value is shorter than the set time, it means that the material level should not be too high, then the smaller value of the two solutions is selected.

[0217] After obtaining the vertical height difference x, the main computing processor can calculate the first material level value: L1=Hx.

[0218] From the calculation formula of ΔI1 and ΔI2, it can be seen that the total radioactive energy M of the material and ΔI1 and ΔI2 will be affected by the nuclear radiation characteristics of the material. However, since the nuclear radiation detection sensors S1 and S2 measure the same target at the same time and their measurement ranges overlap, through the comprehensive calculation of the two, the distance between the material and the two nuclear radiation detection sensors can be calculated without knowing the influence of the actual nuclear radiation characteristic data of the material.

[0219] In the process of generating the first material level value according to the preset algorithm 1, the main computing processor of the device in the embodiment of the present application simplifies the material into a point source for calculation. In fact, the material in the container is a geometric volume. Due to the influence of the actual shape of the container and the feeding and conveying method in the container, the actual geometric shape of the material is more complicated, and it is necessary to increase the correction amount.

[0220] L1=(Hx)+T, T is the material level correction value, T can be negative or positive.

[0221] The material level correction can be obtained by looking up the database table based on the test, or by calculating the fitting function based on a large amount of test data. It should be noted that the material level correction will be different during the rising and falling process of the material in the container. If the first position value is calculated based on the increase or decrease of the material, the preset statistical time is different, the material level correction characteristics are also different, and the industrial site process may also affect the material level correction.

[0222] The first position value will not be affected by the radioactive characteristics of the material, and the first material level value converted from the first position value will not be affected by changes in the radioactive characteristics of the material.

[0223] Step 5: The main operation processor calculates and generates relative material type data or real-time material nuclear radiation characteristic values ​​according to a preset material type algorithm based on at least two continuous material level measurement principles.

[0224] The specific calculation to generate relative material data or real-time material nuclear radiation characteristic values ​​is as follows:

[0225] 1. Bring the first material level value into the material nuclear radiation characteristic algorithm to calculate the real-time nuclear radiation characteristic value.

[0226] In the step where the main operation processor calculates and generates relative material type data or calculates and generates real-time material nuclear radiation characteristic values ​​according to a preset material type algorithm based on at least two continuous material level measurement principles, L1 is the first material level value calculated according to the real-time material level algorithm, C 实满In order to reflect the real-time material nuclear radiation characteristic value of the material radioactive characteristics related to the nuclear radiation detection sensor S1, the process of bringing the first material level value into the real-time material level algorithm 2 to calculate the real-time material nuclear radiation characteristic value is as follows:

[0227] L1=2R×(C 测 -C 空 ) / (C 实满 -C 空 );

[0228] (C 实满 -C 空 )=2R×(C 测 -C 空 ) / L1;

[0229] C 实满 =C 空 +2R×(C 测 -C 空 ) / L1;

[0230] In the formula, C 实满 It indicates that the measurement space of the nuclear radiation detection sensor S1 is filled with materials and the actual full warehouse value reached, which is the real-time material nuclear radiation characteristic value, C 测 represents the real-time measurement data of the nuclear radiation detection sensor S1, C 空 represents the empty bin data of the nuclear radiation detection sensor S1, and 2R represents the range data of the nuclear radiation detection sensor S1.

[0231] 2. Based on the real-time nuclear radiation characteristic values ​​and the nuclear radiation characteristic values ​​of the benchmark materials, calculate and generate relative material type data.

[0232] In the step of calculating and generating relative material species data or calculating and generating real-time material nuclear radiation characteristic values ​​according to the preset material species algorithm based on at least two continuous material level measurement principles, L1 is the first material level value, and P is the relative material species value reflecting the radioactive characteristics of the material. The process of calculating the relative material species data is as follows:

[0233] P=(C 实满 -C 空 ) / (C 基满 -C 空 )=2R×(C 测 -C 空 ) / L1×(C 基满 -C 空 ) ;

[0234] C 实满 Indicates the actual full warehouse value when the measurement space of nuclear radiation detection sensor S1 is filled with materials. It is the real-time nuclear radiation characteristic value of the material. C 测represents the real-time measurement data of nuclear radiation detection sensor S1, C 空 represents the reference empty space data of nuclear radiation detection sensor S1, C 基满 It represents the benchmark full warehouse data of the nuclear radiation detection sensor S1, which is the nuclear radiation characteristic value of the benchmark material. 2R is the range data of the nuclear radiation detection sensor S1.

[0235] 3. Based on at least 2 real-time nuclear radiation characteristic values, calculate and generate relative material type data.

[0236] In the step of calculating and generating relative material species data or real-time material nuclear radiation characteristic value according to the preset material species algorithm based on at least two continuous material level measurement principles, L1-1 is the first material level value obtained by the first calculation, L1-2 is the first material level value obtained by the second calculation, and P is the relative material species value reflecting the radioactive characteristics of the material. The process of calculating the relative material species data is as follows:

[0237] (C 实满1 -C 空 )=2R×(C 测1 -C 空 ) / L1-1,

[0238] (C 实满2 -C 空 )=2R×(C 测2 -C 空 ) / L1-2;

[0239] P=(C 实满2 -C 空 ) / (C 实满1 -C 空 )=(C 测2 -C 空 )×L1-1 / (C 测1 -C 空 )×L1-2;

[0240] C 实满1 Obtain the first real-time material nuclear radiation characteristic value based on L1-1, C 实满2 According to the second real-time material nuclear radiation characteristic value obtained by L1-2, C 测1 The first measurement data of nuclear radiation detection sensor S1, C 测2 Nuclear radiation detection sensor S1 measures data for the second time.

[0241] 4. Based on the real-time material level algorithm 2, calculate the second material level value, and then calculate and generate relative material type data based on the first material level value and the second material level value.

[0242] In the step of calculating and generating relative material type data or real-time material nuclear radiation characteristic value according to the preset material type algorithm based on at least two continuous material level measurement principles, the main operation processor calculates and generates relative material type data, or calculates and generates real-time material nuclear radiation characteristic value, L1 is the first material level value, L2 is the second material level value, and P is the material type value reflecting the radioactive characteristics of the material, and the process of calculating the relative material type data is as follows:

[0243] L1=2R×(C 测 -C 空 ) / (C 实满 -C 空 ) then (C 实满 -C 空 )=2R×(C 测 -C 空 ) / L1;

[0244] L2=2R×(C 测 -C 空 ) / (C 基满 -C 空 ) then (C 基满 -C 空 )=2R×(C 测 -C 空 ) / L2;

[0245] P=(C 实满 -C 空 ) / (C 基满 -C 空 )=L2 / L1;

[0246] C 实满 Indicates the actual full warehouse value when the measurement space of nuclear radiation detection sensor S1 is filled with materials. It is the real-time nuclear radiation characteristic value of the material. C 测 represents the real-time measurement data of nuclear radiation detection sensor S1, C 空 represents the reference empty space data of nuclear radiation detection sensor S1, C 基满 It represents the reference full warehouse data of the nuclear radiation detection sensor S1, which is the reference material nuclear radiation characteristic value, and 2R is the range data of the nuclear radiation detection sensor S1.

[0247] In the preset algorithm 2, since the selected nuclear radiation detection sensor is affected by its own detection range and the specific position on the container, the calculated starting point of the second material level value may be different from the starting point of the first material level value. Therefore, in practical applications, it is necessary to convert the starting points of the first material level value and the second material level value into one starting point. If the measurement orientation of the nuclear radiation detection sensor S1 used as the second material level value includes the bottom of the container, no conversion is required. How to convert it into a material level counted from the same starting point is a conventional technical means and will not be elaborated here.

[0248] The device and measurement method of this embodiment obtains a real-time material nuclear radiation characteristic value C reflecting the nuclear radiation characteristics of the material in the container. 实满 After receiving the relative material type data P, the main computing processor transmits the real-time material nuclear radiation characteristic value C 实满 Or the relative material type data P is sent to a non-radioactive nuclear radiation level meter with material type correction function in the system or for use by other equipment.

[0249] It should be emphasized that for different materials, the detection range of the non-radioactive nuclear radiation level meter is different for the material corresponding to the minimum level scale of the non-radioactive nuclear radiation level meter, that is, R is different for different material types. However, since the nuclear radiation of the material is attenuated according to the inverse square law when it propagates in space, the detection range R of different material types is relatively close when the material type values ​​are relatively close. In order to facilitate calculation, the preset R of different material types is the same. At the same time, the preset detection range is just from the installation position of the level meter to the bottom of the container. If the detection range of the nuclear radiation sensor is less than or greater than the distance between the nuclear radiation sensor and the bottom of the container, it is necessary to increase the correction parameter for correction to obtain a more accurate material level value.

[0250] In addition, it should be noted that in the data model calculation process of the radiation field theory based on the trial textbook "Field Theory" for higher education printed and published by the Atomic Energy Press in 1995, the essence is the positional relationship between the material and the nuclear radiation sensor, so the parameter R does not need to be considered.

[0251] In the real-time material level algorithm 2, it is sometimes necessary to consider the positional relationship between the nuclear radiation detection sensor and the bottom of the container.

[0252] In actual implementation, a real-time material nuclear radiation characteristic value or a relative material type data after comprehensive calculation can be obtained based on the real-time material nuclear radiation characteristic value or relative material type data obtained multiple times. This step is a conventional technical means in this field and will not be described in detail here.

[0253] Example 2

[0254] like Figure 3 As shown, this embodiment provides a device for real-time identification of radioactive materials, including:

[0255] 3 nuclear radiation detection sensors and main computing processor;

[0256] Each nuclear radiation detection sensor communicates signals and / or data with the main computing processor via wired or wireless means;

[0257] The nuclear radiation detection sensors are installed on the outer wall of the same container in the process flow, wherein the three nuclear radiation detection sensors are at different heights on the outer wall of the container and their detection ranges overlap;

[0258] The main operation processor generates relative material type data or real-time material nuclear radiation characteristic values ​​reflecting the radioactive characteristics of the material in the container based on the nuclear radiation data obtained by each of the nuclear radiation detection sensors and a preset material type algorithm based on at least two continuous material level measurement principles.

[0259] In this embodiment, three nuclear radiation detection sensors are configured. Nuclear radiation detection sensor S1 and nuclear radiation detection sensor S2 are arranged at the high and low positions on one side of the container respectively, and nuclear radiation detection sensor S3 is arranged on the symmetrical side of the container. The height of nuclear radiation detection sensor S3 is the same as that of the high position nuclear radiation detection sensor S1 on the symmetrical side; or three nuclear radiation detection sensors are arranged at the upper, middle and lower positions on the same vertical line perpendicular to the ground, as shown in Figure 4.

[0260] When three nuclear radiation detection sensors are used, the areas of nuclear radiation collection of nuclear radiation detection sensors S1, S2 and S3 are all S, and the changes in real-time nuclear radiation measurement values ​​are ΔI1, ΔI2 and ΔI3 respectively. The height difference between the bottom of the container and the nuclear radiation detection sensor S1 is H, the first material level value of the material is L1, and K is the overall value reflecting the radioactive characteristics of the material. Then the preset algorithm 1 is:

[0261] r1 2 =K / ΔI1, r2 2 =K / ΔI2, r3 2 =K / ΔI3;

[0262] r1 2 =d 2 +x 2 , r2 2 =d 2 +(a+x) 2 =d 2 +a 2 +2ax+x 2 , r3 2 =d 2 +(2a+x) 2 =d 2 +4a 2 +4ax+x 2 ;

[0263] K / ΔI1=d 2 +x 2 , K / ΔI2=d 2 +(a+x) 2 =d 2 +a2 +2ax + x 2 ,K / ΔI3 = d 2 +(2a + x) 2 = d 2 +4a 2 +4ax + x 2 ;

[0264] K = (d 2 + x 2 )ΔI1,K = (d 2 + a 2 +2ax + x 2 )ΔI2,K = (d 2 +4a 2 +4ax + x 2 )ΔI3;

[0265] Substitute K = (d 2 + x 2 )ΔI1 into the following two formulas, we get:

[0266] (d 2 + x 2 )ΔI1 = (d 2 + a 2 +2ax + x 2 )ΔI2;

[0267] (d 2 + x 2 )ΔI1 = (d 2 +4a 2 +4ax + x 2 )ΔI3;

[0268] Transpose the terms

[0269] (ΔI1 - ΔI2)x 2 +(ΔI1 - ΔI2)d 2 - a 2 ΔI2 - 2axΔI2 = 0;

[0270] (ΔI1 - ΔI3)x 2 +(ΔI1 - ΔI3)d 2 - 4a 2 ΔI2 - 4axΔI2 = 0;

[0271] Factor out (x 2 ), we have:

[0272] (ΔI1 - ΔI2)(ΔI1 - ΔI3)x 2 +(ΔI1 - ΔI2)(ΔI1 - ΔI3)d 2 - a 2(ΔI1-ΔI3)ΔI2-2axΔI2(ΔI1-ΔI3)=0;

[0273] (ΔI1-ΔI3)(ΔI1-ΔI2)x 2 +(ΔI1-ΔI3)(ΔI1-ΔI2)d 2 -4a 2 ΔI2(ΔI1-ΔI2)-4axΔI2(ΔI1-ΔI2)=0

[0274] Then we have:

[0275] [4aΔI2(ΔI1-ΔI2)-2aΔI2(ΔI1-ΔI3)]x+[4ΔI2(ΔI1-ΔI2)-(ΔI1-ΔI3)ΔI2]a 2 +[(ΔI1-ΔI2)(ΔI1-ΔI3)-(ΔI1-ΔI3)(ΔI1-ΔI2)]d 2 =0;

[0276] By solving the above linear equation, the vertical height difference x between the material and the nuclear radiation detection sensor S1 is calculated.

[0277] If there is no solution, it may be due to environmental influences, attenuation effects, etc. After correcting the influencing factors, recalculate.

[0278] After obtaining x, the main computing processor can calculate the first material level value: L1=Hx.

[0279] In actual implementation, if three nuclear radiation detection sensors are configured on a container, the first material level value can be generated by using the preset real-time material level algorithm 1 according to the measurement data of two of the nuclear radiation detection sensors, and then the second material level value can be generated by using the preset real-time material level algorithm 2 according to the measurement data of the third nuclear radiation detection sensor. Alternatively, the first material level value can be calculated according to the preset real-time material level algorithm 1 according to the measurement data of the three nuclear radiation detection sensors, and then the second material level value can be generated by using the measurement data of one of the nuclear radiation detection sensors and the preset real-time material level algorithm 2.

[0280] Example 3

[0281] This embodiment provides a device for real-time identification of radioactive materials, including:

[0282] At least 2 nuclear radiation detection sensors and a main computing processor;

[0283] Each of the nuclear radiation detection sensors communicates signals and / or data with the main computing processor via wired or wireless means;

[0284] The nuclear radiation detection sensors are installed on the same outer wall of a container in the process flow, wherein at least two of the nuclear radiation detection sensors are at different heights on the outer wall of the container and have overlapping detection ranges;

[0285] The main operation processor generates relative material type data or real-time material nuclear radiation characteristic values ​​reflecting the radioactive characteristics of the material in the container based on the nuclear radiation data obtained by each of the nuclear radiation detection sensors and a preset material type algorithm based on at least two continuous material level measurement principles.

[0286] The main computing processor includes the following functional modules:

[0287] Algorithm preset module: The preset algorithms include at least:

[0288] Real-time material level algorithm 1: based on the positional relationship between the material in the container and at least two of the nuclear radiation detection sensors, a first material level value is generated in real time.

[0289] Real-time material level algorithm 2: Based on the material nuclear radiation characteristic data, the second material level value is generated in real time;

[0290] Or the preset algorithm at least includes: real-time material level algorithm 1, real-time material level algorithm 2 and material nuclear radiation characteristic algorithm; the material nuclear radiation characteristic algorithm is used to generate material nuclear radiation characteristic value; the material nuclear radiation characteristic algorithm is derived from the real-time material level algorithm 2;

[0291] Real-time measurement data acquisition module: obtains nuclear radiation data sent by each nuclear radiation detection sensor;

[0292] A first material level value generating module: based on the real-time material level algorithm 1, generating the first material level value in real time;

[0293] Material type generation module: calculates and generates the relative material type data, or generates the real-time material nuclear radiation characteristic value, according to a preset material type algorithm based on at least two continuous material level measurement principles.

[0294] Material type correction module: After the main computing processor generates relative material type data or real-time material nuclear radiation characteristic values ​​reflecting the radioactive characteristics of the material in the container in real time, the relative material type data or real-time material nuclear radiation characteristic values ​​are sent to the non-radioactive source nuclear radiation level meter with material type correction function on other containers in the process flow through wired or wireless means;

[0295] After receiving the relative material type data or the real-time material nuclear radiation characteristic value, the non-radioactive nuclear radiation level meter with material type correction function corrects its own measurement to generate more accurate material level data.

[0296] Since the first material level value obtained by the method of the present invention is accurate, the main operation processor can also directly output the generated first material level value to an external device for use as the material level value of the measured container.

[0297] In the corresponding real-time material type identification method, the above corresponding steps are performed.

[0298] Example 4

[0299] This embodiment provides a device for real-time identification of radioactive materials, including:

[0300] At least 2 nuclear radiation detection sensors and a main computing processor;

[0301] Each of the nuclear radiation detection sensors communicates signals and / or data with the main computing processor via wired or wireless means;

[0302] The nuclear radiation detection sensors are installed on the same outer wall of a container in the process flow, wherein at least two of the nuclear radiation detection sensors are at different heights on the outer wall of the container and have overlapping detection ranges;

[0303] The main operation processor generates relative material type data or real-time material nuclear radiation characteristic values ​​reflecting the radioactive characteristics of the material in the container based on the nuclear radiation data obtained by each of the nuclear radiation detection sensors and a preset material type algorithm based on at least two continuous material level measurement principles.

[0304] The main computing processor includes the following functional modules:

[0305] Algorithm preset module: The preset algorithms include at least:

[0306] Real-time material level algorithm 1: based on the positional relationship between the material in the container and at least two of the nuclear radiation detection sensors, a first material level value is generated in real time.

[0307] Real-time material level algorithm 2: Based on the material nuclear radiation characteristic data, the second material level value is generated in real time;

[0308] Or the preset algorithm at least includes: real-time material level algorithm 1, real-time material level algorithm 2 and material nuclear radiation characteristic algorithm; the material nuclear radiation characteristic algorithm is used to generate material nuclear radiation characteristic value; the material nuclear radiation characteristic algorithm is derived from the real-time material level algorithm 2;

[0309] Real-time measurement data acquisition module: obtains nuclear radiation data sent by each nuclear radiation detection sensor;

[0310] A first material level value generating module: based on the real-time material level algorithm 1, generating the first material level value in real time;

[0311] Material type generation module: calculates and generates the relative material type data, or generates the real-time material nuclear radiation characteristic value, according to a preset material type algorithm based on at least two continuous material level measurement principles.

[0312] Equal quantity material type identification module: one of all nuclear radiation detection sensors is defined as a limit sensor, and the other nuclear radiation detection sensor is defined as a nuclear radiation measurement sensor. When the actual material level value in the container reaches the preset value of the limit sensor, the material type data is calculated and generated according to the equal quantity material type identification method in the prior art, such as:

[0313] After the materials in the container reach the equal amount condition, based on P=(C 实满 -C 空 ) / (C 基满 -C 空 ) to obtain relative material species data.

[0314] Based on the relative material type data generated by equal amount material type identification, the material type data generated by the method of the present invention can be verified, replaced or comprehensively calculated to obtain more accurate material type data.

[0315] In the corresponding real-time material type identification method, the above corresponding steps are performed.

[0316] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A device for real-time identification of radioactive materials, characterized in that: include: At least 2 nuclear radiation detection sensors and a main computing processor; Each of the nuclear radiation detection sensors communicates signals and / or data with the main computing processor via wired or wireless means; The nuclear radiation detection sensors are installed on the same outer wall of a container in the process flow, wherein at least two of the nuclear radiation detection sensors are at different heights on the outer wall of the container and have overlapping detection ranges; The main operation processor generates relative material type data or real-time material nuclear radiation characteristic values ​​reflecting the radioactive characteristics of the material in the container based on the nuclear radiation data obtained by each of the nuclear radiation detection sensors and a preset material type algorithm based on at least two continuous material level measurement principles. The relative material type data refers to comparative data obtained through mathematical calculation of data of physical quantities with the same properties.

2. A radioactive material real-time material identification device according to claim 1, characterized in that: The relative material data is one or more of the following comparison values: Comparison value between real-time material nuclear radiation characteristic value and reference material nuclear radiation characteristic value; Comparison values ​​of at least two of the real-time material nuclear radiation characteristic values; A comparison value of the real-time fill level values ​​calculated by fill level algorithms using at least two different continuous fill level measurement principles.

3. The real-time material identification device for radioactive materials according to claim 1 is characterized in that: The main computing processor includes the following functional modules: Algorithm preset module: The preset algorithm includes at least: Real-time material level algorithm 1: based on the positional relationship between the material in the container and at least two of the nuclear radiation detection sensors, a first material level value is generated in real time; Real-time material level algorithm 2: Based on the material nuclear radiation characteristic data, the second material level value is generated in real time; Or the preset algorithm at least includes: Real-time material level algorithm 1, real-time material level algorithm 2 and material nuclear radiation characteristic algorithm; The material nuclear radiation characteristic algorithm is used to generate the material nuclear radiation characteristic value; the material nuclear radiation characteristic algorithm is derived from the real-time material level algorithm 2; Real-time measurement data acquisition module: obtains nuclear radiation data sent by each nuclear radiation detection sensor; A first material level value generating module: based on the real-time material level algorithm 1, generating the first material level value in real time; Material type generation module: calculates and generates the relative material type data or generates the real-time material nuclear radiation characteristic value according to a preset material type algorithm based on at least two continuous material level measurement principles.

4. A radioactive material real-time material identification device according to claim 3, characterized in that: Also includes: Role setting module: setting the nuclear radiation detection sensor associated with each of the preset algorithms.

5. The real-time radioactive material identification device according to claim 3 is characterized in that: Also includes: Reference material nuclear radiation characteristic value setting module: preset reference material nuclear radiation characteristic value, the reference material nuclear radiation characteristic value includes the reference full warehouse value related to the nuclear radiation detection sensor or the reference material nuclear radiation characteristic parameter related to the material.

6. A radioactive material real-time material type identification device according to any one of claims 1 to 2, characterized in that: Also includes: Material type correction module: After the main computing processor generates relative material type data or real-time material nuclear radiation characteristic values ​​reflecting the radioactive characteristics of the material in the container, the relative material type data or real-time material nuclear radiation characteristic values ​​are sent to the non-radioactive source nuclear radiation level meter with material type correction function on other containers in the process flow through wired or wireless means; After receiving the relative material type data or the real-time material nuclear radiation characteristic value, the non-radioactive source nuclear radiation level meter with material type correction function corrects its own measurement and generates material level data.

7. A radioactive material real-time material type identification device according to any one of claims 1 to 2, characterized in that: Also includes: Equal-amount material type identification module: A nuclear radiation detection sensor in the real-time material type identification device for radioactive materials is defined as a limit sensor, and the nuclear radiation detection sensor on the container that is lower than the limit sensor and outside the detection range of the limit sensor is defined as a nuclear radiation measurement sensor; when the actual material level in the container reaches the preset condition of the limit sensor, the main operation processor calculates and generates the relative material type data or the nuclear radiation characteristic value of the material according to the method of equal-amount material type identification.

8. The real-time material identification device for radioactive materials according to claim 1 is characterized in that: The material nuclear radiation characteristic value is a numerical value reflecting the nuclear radiation characteristic of the material. The material nuclear radiation characteristic value is a parameter related to the full warehouse value related to the nuclear radiation detection sensor or the nuclear radiation characteristic related to the material, including the gamma constant of the radioactive substance contained in the material, the nuclear radiation attenuation coefficient, the content in the material or the density of the material. The full warehouse value refers to the nuclear radiation data obtained after the nuclear radiation detection sensor is filled with material within the measurement range.

9. The real-time radioactive material type identification device according to claim 5 is characterized in that: In the material generation module, the material algorithm includes: Bringing the first material level value into the material nuclear radiation characteristic algorithm to calculate the real-time material nuclear radiation characteristic value; Based on the real-time material level algorithm 2, the second material level value is calculated, and then based on the first material level value and the second material level value, the relative material type data is calculated and generated; The relative material type data is calculated based on the real-time material nuclear radiation characteristic value and the reference material nuclear radiation characteristic value; Based on at least two of the real-time material nuclear radiation characteristic values, the relative material type data is calculated and generated.

10. The real-time radioactive material identification device according to claim 3 is characterized in that: Multiple nuclear radiation detection sensors are all equipped with a fixed collimator or at least one of the nuclear radiation detection sensors is equipped with a variable collimator. The main computing processor generates the first material level value in real time based on the position data of multiple nuclear radiation detection sensors, the nuclear radiation measurement data of multiple positions, or the position data of multiple positions of at least one variable collimator nuclear radiation detection sensor or the nuclear measurement data of the positions.

11. The real-time material identification device for radioactive materials according to claim 1 is characterized in that: All functional modules of the main operation processor are arranged in the operation processor in the nuclear radiation detection sensor.

12. A real-time material identification method, characterized in that: The following steps are involved: At least one set of real-time material type identification equipment for radioactive materials as claimed in any one of claims 1 to 11 is arranged on the outer wall of a container in the process flow, the real-time material type identification equipment for radioactive materials comprises at least two of the nuclear radiation detection sensors and the main operation processor, each of the nuclear radiation detection sensors communicates signals and / or data with the main operation processor in a wired or wireless manner, and at least two of the nuclear radiation detection sensors are at different heights on the container, and their detection ranges overlap; At least two algorithms are preset in the main operation processor, including at least: real-time material level algorithm 1: based on the position relationship between the material in the container and at least two of the nuclear radiation detection sensors, a first material level value is generated in real time; real-time material level algorithm 2: based on the nuclear radiation characteristic data of the material, a second material level value is generated in real time; Or the preset algorithm at least includes: Real-time material level algorithm 1, real-time material level algorithm 2 and material nuclear radiation characteristic algorithm; The material nuclear radiation characteristic algorithm is used to generate the material nuclear radiation characteristic value; the material nuclear radiation characteristic algorithm is derived from the real-time material level algorithm 2; The main computing processor acquires the nuclear radiation data sent by each of the nuclear radiation detection sensors; The main operation processor generates a first material level value in real time based on the real-time material level algorithm 1; The main operation processor calculates and generates the relative material type data or generates the real-time material nuclear radiation characteristic value according to the preset material type algorithm based on the at least two continuous material level measurement principles; The relative material data is one or more of the following comparison values: Comparison value between real-time material nuclear radiation characteristic value and reference material nuclear radiation characteristic value; Comparison values ​​of at least two of the real-time material nuclear radiation characteristic values; A comparison value of the real-time fill level values ​​calculated by fill level algorithms using at least two different continuous fill level measurement principles.

13. A real-time material type identification method according to claim 12, characterized in that: After the step of setting at least one set of the radioactive material real-time material type identification device, the following steps are also included: The nuclear radiation detection sensors associated with each of the preset algorithms are arranged in the main operation processor.

14. A real-time material type identification method according to claim 12, characterized in that: After the step of setting at least one set of the real-time material type identification equipment for radioactive materials, generating the relative material type data, or before the step of generating the real-time material nuclear radiation characteristic value, the following steps are also included: The reference material nuclear radiation characteristic value is preset in the main operation processor, including the reference full warehouse value of the nuclear radiation detection sensor related to each of the preset algorithms or the material nuclear radiation characteristic data related to the material.

15. A real-time material type identification method according to claim 12, characterized in that: In the step of generating the relative material type data, or generating the real-time material nuclear radiation characteristic value, the following method is included: A material species algorithm based on at least two continuous material level measurement principles is preset in the main operation processor, and the material species algorithm is: the first material level value is brought into the material nuclear radiation characteristic algorithm to calculate the real-time nuclear radiation characteristic value, or based on the real-time material level algorithm 2, the second material level value is calculated, and then based on the first material level value and the second material level value, the relative material species data is calculated and generated, or based on the real-time nuclear radiation characteristic value and the reference material nuclear radiation characteristic value, the relative material species data is calculated and generated, or based on at least 2 of the real-time nuclear radiation characteristic values, the relative material species data is calculated and generated.

16. A real-time material type identification method according to claim 12, characterized in that: At least one set of real-time material type identification equipment for radioactive materials is arranged on the outer wall of a container in the process flow, and the real-time material type identification equipment for radioactive materials adopts two nuclear radiation detection sensors, which are denoted as nuclear radiation detection sensor S1 and nuclear radiation detection sensor S2; the two nuclear radiation detection sensors are arranged at different heights on the outer wall of the container in a height direction perpendicular to the ground, and the detection ranges of the two nuclear radiation detection sensors overlap.

17. A real-time material type identification method according to claim 16, characterized in that: In the step of generating the first material level value in real time based on the real-time material level algorithm 1, the main operation processor uses two nuclear radiation detection sensors to calculate the first material level value, the connection line of the two nuclear radiation detection sensors is perpendicular to the ground, the horizontal interval between the two nuclear radiation detection sensors and the material is d, the vertical height difference between the material and the nuclear radiation detection sensor S1 is x, the height difference between the bottom of the container and the nuclear radiation detection sensor S1 is H, and the first material level value of the material is L1; during the measurement process, the distance between the nuclear radiation detection sensor S1 and the nuclear radiation detection sensor S2 is a constant value a, and the calculation process of generating the first material level value in real time is as follows: The changes in the measured values ​​measured by the nuclear radiation detection sensor S1 and the nuclear radiation detection sensor S2 are ΔI 1、 ΔI2, then establish a quadratic equation: (△I1-ΔI2)×x 2 -2ΔI2ax-ΔI2 a 2 +(△I1-ΔI2)×d 2 =0 A quadratic equation has two solutions x1, x 2， Where x1≤x2; If ΔI1>ΔI2, then x=x1, if ΔI1<ΔI2, then x=x2, the vertical height difference x between the material and the nuclear radiation detection sensor S1 is the first position value of the material; Then the first material level value is generated: L1 = Hx.

18. A real-time material type identification method according to claim 12, characterized in that: In the step of setting at least one set of real-time material type identification equipment for radioactive materials on the outer wall of a container in the process flow, the three nuclear radiation detection sensors configured are denoted as nuclear radiation detection sensor S1, nuclear radiation detection sensor S2 and nuclear radiation detection sensor S3; the nuclear radiation detection sensor S1 and nuclear radiation detection sensor S2 are respectively arranged at high and low positions on one side of the container, and the nuclear radiation detection sensor S3 is arranged on the symmetrical side of the container, and the height of the nuclear radiation detection sensor S3 is the same as that of the high-position nuclear radiation detection sensor S1 on the symmetrical side; or three nuclear radiation detection sensors are respectively arranged at the upper, middle and lower positions on the same vertical line perpendicular to the ground, and the detection ranges of the three nuclear radiation detection sensors overlap.

19. A real-time material type identification method according to claim 18, characterized in that: In the step of generating the first material level value in real time based on the real-time material level algorithm 1, when the three nuclear radiation detection sensors are located at the upper, middle and lower positions of the same vertical line, the real-time nuclear radiation measurement values ​​of the nuclear radiation detection sensor S1, the nuclear radiation detection sensor S2 and the nuclear radiation detection sensor S3 are I1, I2 and I3 respectively; the horizontal interval between the three nuclear radiation detection sensors and the material is d, and the vertical height difference between the material and the nuclear radiation detection sensor S1 is x; during the measurement process, the distance between the nuclear radiation detection sensor S1 and the nuclear radiation detection sensor S2 is a constant value a, the distance between the nuclear radiation detection sensor S2 and the nuclear radiation detection sensor S3 is a constant value a, the measured value changes measured by the nuclear radiation detection sensor S1, the nuclear radiation detection sensor S2 and the nuclear radiation detection sensor S3 are △I1, △I2 and △I3 respectively, the height difference between the bottom of the container and the nuclear radiation detection sensor S1 is H, and the first material level value of the material is L1, then the calculation process of generating the first material level value in real time is as follows: Establish a linear equation of one variable: [4aΔI2(ΔI1-ΔI2)-2aΔI2(ΔI1-ΔI3)]x+[4ΔI2(ΔI1-ΔI2)-(ΔI1-ΔI3)ΔI2]a 2 +[(ΔI1-ΔI2)(ΔI1-ΔI3)-(ΔI1-ΔI3)(ΔI1-ΔI2)]d 2 =0; By solving the above linear equation, the vertical height difference x between the material and the nuclear radiation detection sensor S1 is calculated, that is, the first position value of the material; Then the first material level value is generated: L1 = Hx.

20. A real-time material type identification method according to claim 12, characterized in that: Three nuclear radiation detection sensors are arranged on a container, and the first material level value is generated by the preset real-time material level algorithm 1 according to the measurement data of two of the nuclear radiation detection sensors, and the second material level value is generated by the preset real-time material level algorithm 2 according to the measurement data of the third nuclear radiation detection sensor; or the first material level value is obtained by calculating according to the preset real-time material level algorithm 1 according to the measurement data of the three nuclear radiation detection sensors, and the second material level value is generated by using the measurement data of one of the nuclear radiation detection sensors and the preset real-time material level algorithm 2.

21. A real-time material type identification method according to claim 17 or 19, characterized in that: In the step of generating the first material level value in real time based on the real-time material level algorithm 1 by the main operation processor, the first material level value is corrected according to the following algorithm: L1=(Hx)+T, T is the material level correction amount.

22. A real-time material type identification method according to claim 16 or 18, characterized in that: The preset real-time material level algorithm 2 is: L2 = 2R × (C 测 -C 空 ) / (C 满 -C 空 ); Among them, C 测 represents the measurement data of the nuclear radiation detection sensor S1 related to the real-time material level algorithm 2, C 空 represents the empty space value of the nuclear radiation detection sensor S1, C 满 represents the full-warehouse value of the nuclear radiation detection sensor S1, 2R is the range data of the nuclear radiation detection sensor S1, and L2 is the second material level value.

23. A real-time material type identification method according to claim 16 or 18, characterized in that: In the step where the main operation processor calculates and generates the relative material type data or calculates and generates the real-time material nuclear radiation characteristic value according to the preset material type algorithm based on the at least two continuous material level measurement principles, L1 is the first material level value calculated according to the real-time material level algorithm 1, C 实满 In order to reflect the real-time material nuclear radiation characteristic value of the material radioactive characteristics related to the nuclear radiation detection sensor S1, the process of bringing the first material level value into the real-time material level algorithm 2 to calculate the real-time material nuclear radiation characteristic value is as follows: L1=2R×(C 测 -C 空 ) / (C 实满 -C 空 ); (C 实满 -C 空 )=2R×(C 测 -C 空 ) / L1; C 实满 =C 空 +2R×(C 测 -C 空 ) / L1; C 实满 It indicates that the measurement space of the nuclear radiation detection sensor S1 is filled with materials and the actual full warehouse value reached, which is the real-time material nuclear radiation characteristic value, C 测 represents the real-time measurement data of the nuclear radiation detection sensor S1, C 空 represents the empty bin data of the nuclear radiation detection sensor S1, and 2R represents the range data of the nuclear radiation detection sensor S1.

24. A real-time material type identification method according to claim 23, characterized in that: In the step of calculating and generating the relative material type data or the real-time material nuclear radiation characteristic value according to the preset material type algorithm based on the at least two continuous material level measurement principles, the main operation processor calculates and generates the relative material type data, or calculates and generates the real-time material nuclear radiation characteristic value, L1 is the first material level value, and P is the relative material type value reflecting the material radioactive characteristics. The process of calculating the relative material type data is as follows: P=(C 实满 -C 空 ) / (C 基满 -C 空 )=2R×(C 测 -C 空 ) / L1×(C 基满 -C 空 ); C 实满 It indicates that the measurement space of the nuclear radiation detection sensor S1 is filled with materials and the actual full warehouse value reached, which is the real-time material nuclear radiation characteristic value, C 测 represents the real-time measurement data of the nuclear radiation detection sensor S1, C 空 represents the reference empty space data of the nuclear radiation detection sensor S1, C 基满 It represents the reference full warehouse data of the nuclear radiation detection sensor S1, which is the nuclear radiation characteristic value of the reference material, and 2R is the range data of the nuclear radiation detection sensor S1.

25. A real-time material type identification method according to claim 16 or 18, characterized in that: In the step of calculating and generating the relative material species data or the real-time material nuclear radiation characteristic value according to the preset material species algorithm based on the at least two continuous material level measurement principles, L1-1 is the first material level value obtained by the first calculation, L1-2 is the first material level value obtained by the second calculation, and P is the relative material species value reflecting the radioactive characteristics of the material. The process of calculating the relative material species data is as follows: (C 实满1 -C 空 )=2R×(C 测1 -C 空 ) / L1-1, (C 实满2 -C 空 )=2R×(C 测2 -C 空 ) / L1-2; P=(C 实满2 -C 空 ) / (C 实满1 -C 空 )=(C 测2 -C 空 )×L1-1 / (C 测1 -C 空 )×L1-2 C 实满1 According to L1-1, the first real-time material nuclear radiation characteristic value is obtained, C 实满2 According to the second real-time material nuclear radiation characteristic value obtained by L1-2, C 测1 The nuclear radiation detection sensor S1 first measures data, C 测2 The nuclear radiation detection sensor S1 measures data for the second time.

26. A real-time material type identification method according to claim 16 or 18, characterized in that: In the step of calculating and generating the relative material type data or the real-time material nuclear radiation characteristic value according to the preset material type algorithm based on the at least two continuous material level measurement principles, the main operation processor calculates and generates the relative material type data, or calculates and generates the real-time material nuclear radiation characteristic value, L1 is the first material level value, L2 is the second material level value, and P is the material type value reflecting the material radioactive characteristics. The process of calculating the relative material type data is as follows: L1 = 2R×(C 测 - C 空 ) / (C 实满 - C 空 ) Then (C 实满 - C 空 ) = 2R×(C 测 - C 空 ) / L1; L2 = 2R×(C 测 -C 空 ) / (C 基满 -C 空 ) Then (C 基满 -C 空 ) = 2R×(C 测 -C 空 ) / L2; P=(C 实满 -C 空 ) / (C 基满 -C 空 )=L2 / L1; C 实满 It indicates that the measurement space of the nuclear radiation detection sensor S1 is filled with materials and the actual full warehouse value reached, which is the real-time material nuclear radiation characteristic value, C 测 represents the real-time measurement data of the nuclear radiation detection sensor S1, C 空 represents the reference empty space data of the nuclear radiation detection sensor S1, C 基满 It represents the reference full warehouse data of the nuclear radiation detection sensor S1, which is the nuclear radiation characteristic value of the reference material, and 2R is the range data of the nuclear radiation detection sensor S1.

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