High-precision measurement equipment, measurement methods and detection methods for radiation monitoring

Abstract

This disclosure provides a high-precision measuring device and method for radiation monitoring. The measuring device includes a radiation device, a detection device, and a monitoring device. The radiation device is installed on a first side of the container being measured, and the detection device is installed on a second side of the container, with the first and second sides opposite each other. The container contains a medium. The monitoring device is installed on the first side of the radiation device and connected to the detection device. This measuring device can measure the density, concentration, and / or level of the medium inside a container or pipeline without contact.

Description

Technical Field

[0001] The present disclosure relates to the field of industrial measurement technology, and in particular to a high-precision measurement device and a measurement method and a detection method for radiation monitoring. The present disclosure relates to a high-precision measurement device and a measurement method and a detection method. Background Art

[0002] With the development of science and technology, the industrial field has become more intelligent, automated, and simple, which is inseparable from a variety of instruments. Since the working conditions and measurement environments of various industries in the industrial field are different, for example, in the production process, there are some complex environments such as high temperature, high pressure, high dust, high toxicity, and high corrosion. Contact measuring instruments can more or less not meet one or more of these working conditions, resulting in inaccurate measurements or the inability to use the measuring instruments for a long time. There are also non-contact measuring instruments, but they are affected by the local environmental background noise, resulting in inaccurate measurement values. Summary of the invention

[0003] In order to solve at least one of the above technical problems, the present disclosure provides a high-precision measurement device, a measurement method, and a detection method for radiation monitoring, which can realize non-contact measurement of density, concentration and / or material level, etc.

[0004] In a first aspect of the present disclosure, a high-precision measurement device for radiation monitoring is provided, comprising: a radiation device, a detection device, and a monitoring device, wherein the radiation device is mounted on a first side of a container to be measured, the detection device is mounted on a second side of the container to be measured, the first side is opposite to the second side, the container to be measured contains a medium, and the monitoring device is mounted on the first side of the radiation device and connected to the detection device;

[0005] The radiation device is used to simultaneously generate a first ray and a second ray that are collinear but in opposite directions, the first ray passes through the container to be tested and the medium and then enters the detection device, and the second ray directly enters the monitoring device;

[0006] The detection device detects the first ray to form a first ray measurement signal;

[0007] The monitoring device directly detects the second ray to form a second ray measurement signal.

[0008] In some embodiments of the first aspect of the present disclosure, the detection device is used to detect radiation to form a detection radiation measurement signal, the radiation detected by the detection device includes at least the first radiation generated by the radiation device and the radiation of the background environment, and the detection radiation measurement signal includes at least the first radiation measurement signal formed by the first radiation and the first background radiation measurement signal formed by the radiation of the background environment; the monitoring device is used to detect radiation to form a monitoring radiation measurement signal, the radiation detected by the monitoring device includes at least the second radiation generated by the radiation device and the radiation of the background environment, and the monitoring radiation measurement signal includes at least the second radiation measurement signal formed by the second radiation and the second background radiation measurement signal formed by the radiation of the background environment; the first radiation measurement signal and the first background radiation measurement signal in the detection radiation measurement signal are distinguished by comparing whether the generation time of the detection radiation measurement signal is simultaneous with the generation time of the monitoring radiation measurement signal or whether the time interval is less than or equal to the first preset value.

[0009] In some embodiments of the first aspect of the present disclosure, the detection device is also used to receive the monitoring ray measurement signal transmitted by the monitoring device, compare the generation time of the detection ray measurement signal and the monitoring ray measurement signal, if the generation time of the two is simultaneous or the time interval is less than or equal to a first preset value, then it is considered that the monitoring ray measurement signal detected by the monitoring device this time is the second ray measurement signal formed by the second ray generated by the radiation device and the detection ray measurement signal detected by the detection device this time is the first ray measurement signal formed by the first ray generated by the radiation device, and it is determined that the detection ray measurement signal detected by the detection device this time is valid and is the first ray measurement signal, the detection device records and saves the first ray measurement signal detected this time, and post-processes and analyzes to obtain measurement information of the first ray measurement signal, if the generation time of the two is not simultaneous or the time interval is greater than the first preset value, the detection device deletes or ignores the detection ray measurement signal detected this time.

[0010] In some implementations of the first aspect of the present disclosure, the first ray measurement signal and / or the second ray measurement signal is a narrow pulse signal of less than 10 ms.

[0011] In some embodiments of the first aspect of the present disclosure, a main controller is further included for receiving measurement information of the first ray measurement signal transmitted by the detection device, and the main controller finally obtains the density, concentration and / or material level of the medium according to the measurement information of the first ray measurement signal; wherein the measurement information of the first ray measurement signal at least includes one of the waveform of the first ray measurement signal, the amplitude of the first ray measurement signal, the width of the first ray measurement signal, the energy of the first ray measurement signal, the generation time of the first ray measurement signal, the channel address information, the number of accumulated counts of each channel address, the occurrence time of each count of each channel address, the time frequency of the counts of each channel address, and the time interval of the counts of each channel address.

[0012] In some embodiments of the first aspect of the present disclosure, there is at least one detection device, and at least one of the detection devices is installed on the second side of the container to be measured. If there are multiple detection devices, the multiple detection devices share a main controller, and the main controller is used to receive measurement information of the first ray measurement signal transmitted by each of the detection devices and determine the density, concentration and / or material level of the medium after summarizing and counting.

[0013] In some embodiments of the first aspect of the present disclosure, the number of the detection device is one and the detection device is installed at a material warning position on the second side of the measured container, and is used for detecting an over-high or over-low material level of the medium in the measured container.

[0014] In some embodiments of the first aspect of the present disclosure, the radiation device includes a shell and a radiation source, the radiation source is used to simultaneously generate a first ray and a second ray that are collinear but in opposite directions, the shell wraps the radiation source, and a first emission channel and a second emission channel are provided on the shell, the first emission channel is directed toward the container to be tested so that the first ray generated by the radiation source passes through the container to be tested and enters the detection device after being acted upon by the medium, and the second emission channel is directed toward the monitoring device so that the second ray generated by the radiation source directly enters the monitoring device.

[0015] In some embodiments of the first aspect of the present disclosure, the first emission channel and the second emission channel are collinear and in opposite directions.

[0016] In some embodiments of the first aspect of the present disclosure, the first emission channel and / or the second emission channel has a preset diffusion angle, which is used to make the first ray and / or the second ray have a preset radiation angle; preferably, the material forming the first emission channel and / or the second emission channel includes at least a heavy metal; preferably, the heavy metal is lead.

[0017] In some embodiments of the first aspect of the present disclosure, the diffusion angle of the second emission channel is greater than the diffusion angle of the first emission channel.

[0018] In some embodiments of the first aspect of the present disclosure, the radiation device further includes a first switch component and / or a second switch component, the first switch component is used to open or close the first emission channel, and the second switch component is used to open or close the second emission channel.

[0019] In some embodiments of the first aspect of the present disclosure, the type of the radiation source is 22 Nah.

[0020] In some embodiments of the first aspect of the present disclosure, the activity of the radioactive source is less than 1*10 6 Bq is the immunity level.

[0021] In some embodiments of the first aspect of the present disclosure, the detection device includes: a first scintillation material, a first photomultiplier tube, a first signal processing circuit, a first high-voltage stabilization module, a first power supply module, a first communication module and a first processing module, wherein the first scintillation material, the first photomultiplier tube, the first signal processing circuit, the first processing module and the first communication module are connected in sequence, the first communication module is used to connect to the main controller; the first high-voltage stabilization module is connected to the first photomultiplier tube, and the first power supply module is used to connect to an external power supply;

[0022] The monitoring device includes: a second scintillation material, a second photomultiplier tube, a second signal processing circuit, a second high-voltage stabilization module, a second power supply module and a second communication module, wherein the second scintillation material, the second photomultiplier tube, the second signal processing circuit and the second communication module are connected in sequence, and the second communication module is used to connect the detection device; the second high-voltage stabilization module is connected to the second photomultiplier tube, and the second power supply module is used to connect to an external power supply.

[0023] In some embodiments of the first aspect of the present disclosure, the first scintillation material is the same as or different from the second scintillation material.

[0024] In some embodiments of the first aspect of the present disclosure, the first scintillation material and the second scintillation material differ in at least one of type, material, and shape.

[0025] In some embodiments of the first aspect of the present disclosure, the first scintillating material and / or the second scintillating material is a plastic scintillator or a scintillating crystal.

[0026] In some embodiments of the first aspect of the present disclosure, the monitoring device further includes a second processing module, which is used to analyze and process the monitoring ray measurement signal to obtain measurement information of the monitoring ray measurement signal, wherein the measurement information of the monitoring ray measurement signal at least includes measurement information of the second ray measurement signal and measurement information of the second background radiation measurement signal, and the radiation function of the radiation device is detected according to the measurement information of the monitoring ray measurement signal, and the offset of the ray energy spectrum is detected according to the measurement information of the monitoring ray measurement signal to calibrate or correct the measured density, concentration and / or material level; wherein the radiation function detection of the radiation device includes the radiation device in the radiation device Detection of the activity of the radioactive source, detection of whether the radioactive source in the radiation device is lost, sending a prompt message to the main controller through the second communication module when it is detected that the activity of the radioactive source in the radiation device fails or the radioactive source is lost, so that the main controller reminds the user; the measurement information of the monitoring radiation measurement signal at least includes one of the waveform of the monitoring radiation measurement signal, the amplitude of the monitoring radiation measurement signal, the width of the monitoring radiation measurement signal, the energy of the monitoring radiation measurement signal, the generation time of the monitoring radiation measurement signal, the monitoring channel address information, the number of accumulated counts of each channel address, the occurrence time of each count of each channel address, the time frequency of each channel address count, and the time interval of each channel address count.

[0027] In some embodiments of the first aspect of the present disclosure, the main controller includes: a display module module, used to at least display the density, concentration and / or material level of the medium to the user; a power supply circuit, the power supply circuit is used to power the detection device and / or the monitoring device; a third communication module, used to receive output information transmitted by the first communication module and / or the second communication module, and to output signals to the display module and / or to an external field control system, wherein the output signal is one of the following: a current signal, a switch signal, a 485 communication signal.

[0028] A second aspect of the present disclosure provides a measurement method, which is applied to a measurement device, wherein the measurement device includes a radiation device, a detection device, a monitoring device, and a main controller, wherein the measured container contains a medium;

[0029] The measuring method comprises: generating a first ray and a second ray simultaneously by the radiation device, and emitting the first ray to the measured container and emitting the second ray directly to the monitoring device; detecting the ray by the detection device to form a detection ray measurement signal, the detection ray measurement signal comprises a first ray measurement signal formed after the first ray passes through the measured container and the medium, and a first background radiation measurement signal formed by the radiation of the background environment; detecting the ray by the monitoring device to form a monitoring ray measurement signal, the monitoring ray measurement signal comprises a second ray measurement signal formed by directly detecting the second ray, and a second background radiation measurement signal formed by the radiation of the background environment; receiving the monitoring ray measurement signal transmitted by the monitoring device by the detection device and comparing the detection ray measurement signal with the monitoring ray measurement signal, if the detection When the generation time of the radiation measurement signal is simultaneous with the generation time of the monitoring radiation measurement signal or the time interval is less than or equal to a first preset value, it is considered that the detection radiation measurement signal detected by the detection device this time is the first radiation measurement signal corresponding to the first radiation generated by the radiation device, and the monitoring radiation measurement signal detected by the monitoring device this time is the second radiation measurement signal corresponding to the second radiation generated by the radiation device. The detection device records and saves the first radiation measurement signal formed this time and analyzes to obtain the measurement information of the first radiation measurement signal. Otherwise, the detection device deletes or ignores the detection radiation measurement signal formed this time; the main controller receives the measurement information of the first radiation measurement signal transmitted by the detection device, and obtains the density, concentration and / or material level of the medium according to the measurement information of the first radiation measurement signal.

[0030] In some embodiments of the second aspect of the present disclosure, the main controller obtains the density, concentration and / or material level of the medium according to the measurement information of the first ray measurement signal, including: the main controller obtains the signal characteristics of the first ray measurement signal according to the measurement information of the first ray measurement signal; the main controller determines the density, concentration and / or material level of the medium according to the signal characteristics of the first ray measurement signal and a predetermined first corresponding relationship; wherein the first corresponding relationship includes one or more of the following: a corresponding relationship between signal characteristics and medium density, a corresponding relationship between signal characteristics and medium concentration, and a corresponding relationship between signal characteristics and medium material level; the signal characteristics include one or more of the following: ray intensity, ray quantity, ray attenuation.

[0031] In some embodiments of the second aspect of the present disclosure, the main controller obtains the signal characteristics of the first ray measurement signal based on the measurement information of the first ray measurement signal, including: obtaining a peak value corresponding to the first ray measurement signal based on the measurement information of the first ray measurement signal, and obtaining the signal characteristics of the first ray measurement signal based on the peak value of the first ray measurement signal.

[0032] In some embodiments of the second aspect of the present disclosure, the main controller obtains the signal characteristics of the first ray measurement signal based on the measurement information of the first ray measurement signal, including: obtaining the peak value of the first ray measurement signal based on the measurement information of the first ray measurement signal, determining the peak boundary based on the peak value of the first ray measurement signal to calculate the peak area, and determining the signal characteristics of the first ray measurement signal based on the peak area.

[0033] The third aspect of the present disclosure provides a detection method, which is applied to a measuring device, wherein the measuring device at least includes a radiation device and a monitoring device, wherein the monitoring device includes a second processing module to detect the activity of a radioactive source in the radiation device; the detection method includes: the radioactive source in the radiation device directly emits a second ray to the monitoring device; the monitoring device detects the ray to form a monitoring ray measurement signal, wherein the monitoring ray measurement signal includes a second ray measurement signal formed by directly detecting the second ray and a second background radiation measurement signal formed by the ray of background environment radiation; the monitoring device analyzes and processes the monitoring ray measurement signal to obtain measurement information of the monitoring ray measurement signal; the monitoring device detects the activity of the radioactive source in the radiation device according to the measurement information of the second ray measurement signal in the monitoring ray measurement signal, and determines whether the activity of the radioactive source in the radiation device is too low or has failed.

[0034] In some embodiments of the third aspect of the present disclosure, the activity of the radiation source in the radiation device is detected according to the measurement information of the second ray measurement signal, including: obtaining the signal characteristics of the second ray measurement signal according to the measurement information of the second ray measurement signal, the signal characteristics of the second ray measurement signal including one or more of the following: ray intensity, number of rays, ray attenuation; when the ray intensity is less than a second preset value or the number of rays is less than a third preset value or the ray attenuation is greater than a fourth preset value, it is determined that the activity of the radiation source in the radiation device is too low or has failed.

[0035] A fourth aspect of the present disclosure provides a detection method, which is applied to a measuring device, wherein the measuring device at least includes a radiation device and a monitoring device, wherein the monitoring device includes a second processing module to detect whether a radiation source in the radiation device is lost;

[0036] The detection method includes: the radiation source in the radiation device directly emits a second ray to the monitoring device; the monitoring device detects the ray to form a monitoring ray measurement signal, wherein the monitoring ray measurement signal includes a second ray measurement signal formed by directly detecting the second ray and a second background radiation measurement signal formed by rays of background environment radiation; the monitoring device analyzes and processes the monitoring ray measurement signal to obtain measurement information of the monitoring ray measurement signal; the monitoring device detects whether the radiation source in the radiation device is lost based on the measurement information of the second ray measurement signal in the monitoring ray measurement signal.

[0037] In some embodiments of the fourth aspect of the present disclosure, the detecting whether the radiation source in the radiation device is lost based on the measurement information of the second ray measurement signal includes: obtaining the signal characteristics of the second ray measurement signal based on the measurement information of the second ray measurement signal, the signal characteristics of the second ray measurement signal including one or more of the following: ray intensity, number of rays, ray attenuation; when the ray intensity is less than a first lower limit value or the number of rays is less than a second lower limit value or the ray attenuation is greater than a first upper limit value, determining that the radiation source in the radiation device is lost.

[0038] The measuring device disclosed in the present invention can measure the density, concentration and / or material level and other information of the medium in the container through radiation. The measuring device does not need to be in contact with the medium and can be applied in various working conditions such as dust, high temperature, high pressure, high toxicity, high corrosion, etc. There is no need to make grooves or holes on the measured container. It is easy to install, lay out and maintain, and the measurement error caused by background environmental noise can be reduced by the monitoring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.

[0040] Figure 1 is a schematic diagram of the structure of a measuring device according to some embodiments of the present disclosure.

[0041] Figure 2 is a schematic structural diagram of a radiation device in a measuring device according to some embodiments of the present disclosure.

[0042] Figure 3 It is a schematic diagram of the structure of an emission channel of a radiation device in a measuring device according to some embodiments of the present disclosure.

[0043] Figure 4 is another structural schematic diagram of a measuring device according to some embodiments of the present disclosure.

[0044] Figure 5 is a schematic diagram of the circuit structure of a measuring device according to some embodiments of the present disclosure.

[0045] Figure 6 is an example diagram of an effective ray energy spectrum curve according to some embodiments of the present disclosure.

[0046] Figure 7 is a schematic diagram of the structure of a main controller in a measuring device according to some embodiments of the present disclosure.

[0047] Figure 8 is an example diagram of peak values ​​and peak areas in an effective ray energy spectrum curve according to some embodiments of the present disclosure.

[0048] Fig. 9 is a flowchart of a measurement method according to some embodiments of the present disclosure.

[0049] Fig.10 is an example diagram of a full energy spectrum curve of rays according to some embodiments of the present disclosure.

[0050] Fig.11 is a schematic flow chart of a detection method according to some embodiments of the present disclosure.

[0051] Fig.12 is an example diagram of peak values ​​and peak areas in a full energy spectrum curve of rays according to some embodiments of the present disclosure.

[0052] Fig.13 It is a schematic flow chart of the detection method according to other embodiments of the present disclosure.

[0053] Description of Reference Numerals

[0054] 100, measuring device; 200, container to be measured; 300, medium; 110, radiation device; 120, detection device; 130, main controller; 140, monitoring device; 150, first ray; 160, second ray; 170, first ray measurement signal; 180, second ray measurement signal; 111, housing; 112, radiation source; 113, first emission channel; 114, second emission channel; 121, first scintillation material; 122, first photomultiplier tube; 123, first Signal processing circuit; 124, first high-voltage stabilizing module; 125, first power supply module; 126, first communication module; 127, first processing module; 141, second scintillation material; 142, second photomultiplier tube; 143, second signal processing circuit; 144, second high-voltage stabilizing module; 145, second power supply module; 146, second communication module; 131, third processing module; 132, third communication module; 133, power supply circuit; 134, display device; 135, speaker. DETAILED DESCRIPTION

[0055] The present disclosure is further described in detail below in conjunction with the accompanying drawings and implementations. It is understood that the specific implementations described herein are only used to explain the relevant content, rather than to limit the present disclosure. It should also be noted that, for ease of description, only the parts related to the present disclosure are shown in the accompanying drawings.

[0056] The use of cross-hatching and / or shading in the accompanying drawings is generally used to make the boundaries between adjacent components clear. As such, unless otherwise specified, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for the specific materials, material properties, dimensions, proportions, commonalities between the components shown, and / or any other characteristics, attributes, properties, etc. of the components. In addition, in the accompanying drawings, the sizes and relative sizes of the components may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two successively described processes can be performed substantially simultaneously or in an order opposite to the described order. In addition, the same figure numbers represent the same components.

[0057] When a component is referred to as being "on" or "over," "connected to," or "coupled to" another component, the component may be directly on, directly connected to, or directly coupled to the other component, or intervening components may be present. However, when a component is referred to as being "directly on," "directly connected to," or "directly coupled to" another component, there are no intervening components. For this purpose, the term "connected" may refer to a physical connection, an electrical connection, etc., with or without intervening components.

[0058] The “connection” in the present disclosure may be, but is not limited to, a wired connection such as a cable, a wireless communication connection such as near field communication, Bluetooth, a mobile network, Ethernet, a local area network, and the like.

[0059] The present disclosure can be applied to various scenarios where it is necessary to measure information such as medium concentration, density, material level, etc. In particular, the present disclosure is particularly applicable to situations where industrial production equipment contains media such as gas, liquid, solid, gas-liquid mixture, solid-liquid mixture, etc. Since the measuring device of the present disclosure can measure information such as concentration, density, material level, etc. of the medium in the production equipment without contact and is easy to install, it is particularly applicable to complex environments such as high temperature, high pressure, high dust, high toxicity, and high corrosiveness.

[0060] The "container to be tested" of the present disclosure may be a container that can hold a medium, a pipe that transports a medium, or other similar components. Taking production equipment in the industrial field as an example, the "container to be tested" of the present disclosure may be, but is not limited to, containers, pipes, and other components in the production equipment.

[0061] Figure 1 Schematic diagram of a high-precision measurement device for radiation monitoring according to an embodiment of the present disclosure. Figure 1 As shown, the measuring device 100 includes: a radiation device 110, a detection device 120, a main controller 130, and a monitoring device 140. The radiation device 110 is installed on the first side of the measured container 200, and the detection device 120 is installed on the second side of the measured container 200. The first side is opposite to the second side. The measured container 200 contains a medium 300. The detection device 120 is connected to the main controller 130. The monitoring device 140 is installed on one side of the radiation device 110 and is opposite to the detection device. The monitoring device 140 is connected to the detection device 120 and the main controller 130. Therefore, the radiation generated and emitted by the radiation device 110 can pass through the inside of the measured container 200 and enter the detection device 120 after being acted on by the medium 300; the radiation generated and emitted by the radiation device 110 can also be detected by the monitoring device. Figure 1 In FIG. 1 , the shaded portion in the container 200 to be tested represents the medium 300 .

[0062] The radiation device 110 generates and emits a first ray 150 and a second ray 160 simultaneously. The first ray 150 and the second ray 160 are collinear but in opposite directions. In addition, the first ray 150 and the second ray 160 have the same energy. The first ray 150 passes through the interior of the container 200 to be tested and enters the detection device 120 after being acted upon by the medium 300. The detection device 120 detects a first ray measurement signal 170 formed corresponding to the first ray 150. The second ray 160 directly enters the monitoring device 140 after being emitted from the radiation device 110, and the monitoring device 140 directly detects a second ray measurement signal 180 formed corresponding to the second ray 160.

[0063] In addition, in addition to the first ray 150 and the second ray 160 generated by the radiation device 110, at least the background environment will also radiate and generate radiation to be detected by the detection device 120 and the monitoring device 140. The detection ray measurement signal formed by the detection ray 120 and the monitoring ray measurement signal formed by the detection ray 140, therefore, the detection ray measurement signal formed by the detection ray 120 at least includes the first ray measurement signal 170 formed by the first ray 150 and the first background radiation measurement signal formed by the radiation radiated by the background environment; the monitoring ray measurement signal formed by the detection ray 140 at least includes the second ray measurement signal 180 formed by the second ray 160 and the second background radiation measurement signal formed by the radiation radiated by the background environment. The monitoring device 140 transmits the detected monitoring ray measurement signal to the detection device 120, and the detection device 120 compares whether the generation time of the detection ray measurement signal detected by the detection device 120 and the generation time of the monitoring ray measurement signal detected by the monitoring device 140 are simultaneous or the time interval is less than or equal to the first preset value, thereby distinguishing and differentiating the first ray measurement signal 170 and the first background radiation measurement signal in the detection ray measurement signal.

[0064] Since the first ray 150 and the second ray 160 are generated and emitted at the same time, the corresponding first ray measurement signal 170 and the second ray measurement signal 180 should also be synchronized (obtained at the same time or with a sufficiently small interval). Since the distance traveled by the first ray 150 to reach the detection device 120 is different from the distance traveled by the second ray 160 to reach the monitoring device 140, but the ray transmission speed is very fast (propagation at the speed of light), when the distance difference is very short, the first ray measurement signal 170 and the second ray measurement signal 180 will be obtained within a sufficiently small interval. Since the distance difference is very short and the propagation speed is the speed of light, such a short distance difference can be ignored, so it can be considered that the first ray measurement signal 170 and the second ray measurement signal 180 will be obtained at the same time. Therefore, the detection device 120 receives the monitoring ray measurement signal transmitted by the monitoring device 140 and compares the generation time of the detection ray measurement signal with the monitoring ray measurement signal. If the two are generated at the same time or the time interval is less than or equal to the first preset value, it is considered that the monitoring ray measurement signal detected by the monitoring device 140 this time is the second ray measurement signal 180 formed by the second ray 160 generated by the radiation device 110 and the detection ray measurement signal 170 detected by the detection device 120 this time is the first ray measurement signal 170 formed by the first ray 150 generated by the radiation device 110, and the detection ray measurement signal detected by the detection device 120 this time is determined to be valid as the first ray measurement signal 170, and the detection device 120 records and saves the detection ray measurement signal (i.e., the first ray measurement signal 170) detected this time, and then processes and analyzes it to obtain the measurement information of the detection ray measurement signal (i.e., the first ray measurement signal), otherwise the detection device 120 deletes or ignores the detection ray measurement signal formed this time, which is the first background radiation measurement signal formed by the ray of background environment radiation. Among them, the first preset value is small enough. In this way, the monitoring measurement signal detected by the monitoring device 140 can be used to detect the validity of the detection measurement signal detected by the detection device 120, and to distinguish and differentiate whether the detection ray measurement signal detected by the detection device 120 this time is the first ray measurement signal 170 or the first background radiation measurement signal, thereby effectively eliminating or ignoring the influence of the interference rays generated in the background environment on the measurement of the detection device 120, thereby improving the accuracy and precision of the measurement.

[0065] The detection device 120 records and stores the effective detection ray measurement signal (the first ray measurement signal 170 that is resolved and distinguished) and obtains the measurement information of the detection ray measurement signal (the first ray measurement signal 170) after analysis and processing, and the detection device 120 also transmits the measurement information of the detection ray measurement signal (the first ray measurement signal 170) to the main controller 130, and the main controller 130 finally obtains the density, concentration and / or material level of the medium 300 according to the measurement information of the first ray measurement signal 170. Among them, the measurement information of the first ray measurement signal 170 obtained after the detection device 120 analyzes and processes at least includes one of the waveform of the first ray measurement signal, the amplitude of the first ray measurement signal, the width of the first ray measurement signal, the energy of the first ray measurement signal, the time when the first ray measurement signal is generated, the track address information, the number of accumulated counts of each track address, the occurrence time of each count of each track address, the time frequency of each track address count, and the time interval of each track address count. The main controller 130 finally obtains the signal characteristics according to the measurement information of the first ray measurement signal 170, and the signal characteristics include at least one of the ray intensity information, ray quantity information, and ray attenuation information. The main controller 130 converts the signal characteristics into the density, concentration and / or material level of the medium 300.

[0066] As can be seen from the above, the measuring device 100 of the present invention can measure the density, concentration and / or material level and other information of the medium 300 in the measured container 200 through rays. The measuring device 100 does not need to contact the medium 300 and can be used in various working conditions such as dust, high temperature, high pressure, high toxicity, high corrosion, etc. There is no need to make grooves or holes on the measured container, so it is easy to install and convenient to deploy.

[0067] Figure 2 FIG. 1 shows an exemplary structural diagram of the radiation device 110. Figure 2As shown, the radiation device 110 may include a shell 111 and a radiation source 112. The shape of the shell 111 may be, but is not limited to, circular, square, elliptical or other shapes. The shell 111 encloses the radiation source 112, and the radiation source 112 is used to generate a first ray 150 and a second ray 160. A first emission channel 113 is provided on the shell 111, and the first emission channel 113 faces the second side of the container 200 to allow the first ray 150 to pass through the inside of the container 200 to be tested and enter the detection device 120 after being acted on by the medium 300; a second emission channel 114 is also provided on the shell 111, and the second emission channel 114 can face one side of the radiation device 110, so that the second ray 160 directly enters the monitoring device 140. The first emission channel 113 and the second emission channel 114 are collinear and opposite in direction, and are used to simultaneously emit the first ray 150 and the second ray 160 generated simultaneously and collinearly and in opposite directions from the radiation device 110. Those skilled in the art should know that in specific applications, there can be more launch channels on the housing 111, which can be specifically configured as needed. Those skilled in the art should understand that the material forming the launch channel can be a heavy metal, such as lead or other heavy metal materials.

[0068] In some embodiments, the first emission channel 113 and / or the second emission channel 114 may have a preset diffusion angle. Figure 3 In other words, the first ray and / or the second ray can have a preset radiation angle through the predetermined diffusion angle. When the first emission channel 113 and the second emission channel 114 both have preset diffusion angles, the diffusion angle of the first emission channel 113 and the diffusion angle of the second emission channel 114 can be the same or different. Preferably, the diffusion angle of the second emission channel 114 can be greater than the diffusion angle of the first emission channel 113.

[0069] In practical applications, the radiation source 112 in the radiation device 110 is replaceable. For example, the radiation source 112 can be replaced regularly by recording the installation and use time of the radiation source 112 and combining the radiation characteristics of the radiation source 112 itself.

[0070] The type of radiation source 112 can be 22 NA, 22 The activity of NA can be the exemption level, and its activity can be less than 1*10 6 Bq. Exempted-level radioactive sources are safe to use and will not cause harm to the body. Users can use them with confidence. After the sales or production units complete and obtain the exemption registration letter, they do not need to go through the transfer approval procedures when transferring or selling the radioactive source. That is, they are safe to use and the procedures are simple and convenient. The greater the activity of the radioactive source, the more rays it generates per second, the more rays it emits, and the greater the intensity of the rays it emits.

[0071] In some embodiments, the radiation device 110 may further include a switch component (not shown), and each emission channel may be provided with a switch component corresponding to the emission channel, and the switch component is used to open or close the corresponding emission channel. Specifically, when the switch component is turned on, the radiation generated by the radiation source 112 can be emitted from the corresponding emission channel, and when the switch component is turned off, the radiation generated by the radiation source 112 will not be emitted from the corresponding emission channel.

[0072] In some embodiments, the radiation device 110 may further include a first switch component and / or a second switch component, the first switch component is used to open or close the first emission channel 113 , and the second switch component is used to open or close the second emission channel 114 .

[0073] In some embodiments, the switch components can be opened or closed automatically, manually, pneumatically or in various other ways, and different switch components can be opened or closed in different ways. If the switch components are opened or closed automatically or pneumatically, the radiation device 110 has a switch control circuit board and needs to be connected to the main controller 130, and the main controller 130 sends a control signal to the switch control circuit board of the radiation device 110, thereby controlling the opening or closing of each switch component.

[0074] In some embodiments, the measuring device 100 may include one or more detection devices 120, and the one or more detection devices 120 may be installed on the second side of the measured container 200 and respectively connected to the main controller 130. If there are multiple detection devices 120, the multiple detection devices 120 share one main controller, and the main controller receives the measurement information of the effective detection ray measurement signal transmitted by each detection device 120 and determines the density, concentration and / or material level of the medium after summarizing and counting. In this way, the detection device 120 can be deployed as needed to achieve various measurements such as switch material level, density / concentration, continuous material level, etc.

[0075] In some embodiments, one of the detection devices 120 can be installed at the material warning position on the second side to measure the switch material level and detect whether the material level is too high or too low. For relevant details, please refer to Application Example 1 below.

[0076] In some embodiments, when the measuring device 100 includes multiple detection devices 120, the multiple detection devices 120 can also be set at any position on the second side of the measured container 200, as long as they can detect the first ray measurement signal after the first ray emitted by the radiation device 110 acts on the medium 300. The main controller 130 can receive the measurement information of the effective detection ray measurement signal (i.e., the first ray measurement signal) provided by each detection device 120, and summarize and count the measurement information of the effective detection ray measurement signal (i.e., the first ray measurement signal) of the multiple detection devices 120, so as to obtain the signal characteristics, and use the signal characteristics to obtain the density, concentration and / or material level of the medium 300. Multiple detection devices 120 can increase the detection receiving area for receiving the first ray 150, thereby increasing the ability and quantity of the captured first ray measurement signals 170. When the activity of the radiation source 112 decreases, the number of first rays 150 emitted by the radiation device 110 will decrease or the intensity will become weaker, which will affect the measurement precision and accuracy of the measuring device 100; when the concentration or density of the medium is relatively high, the blocking effect on the first rays 150 and / or the second rays 160 emitted by the radiation source 112 in the radiation device 110 is greater, resulting in a decrease in the number of first ray measurement signals 170 detected by the detection device 120 or a weakening of the intensity of the first ray measurement signals 170, which is not convenient for analysis and will also affect the measurement precision and accuracy of the measuring device 100; when the diameter of the measured container 200 increases, the number of rays decays exponentially with distance, resulting in a small number of first ray measurement signals 170 formed by the first rays 150 detected by the detection device 120 or a weak intensity of the first ray measurement signals 170, so the above situation can be improved by increasing the number of detection devices 120, and ultimately the measurement precision and accuracy of the measuring device 100 can be improved.

[0077] In some embodiments, when the measuring device 100 includes multiple detection devices 120, the density / concentration of the medium 300 in the measured container 200 can be measured. The multiple detection devices 120 are arranged on the second side of the measured container 200 and can detect radiation to form respective corresponding detection radiation measurement signals, wherein the respective corresponding detection radiation measurement signals include the first radiation measurement signal 170 formed by the first radiation 150 emitted by the radiation device 110 after being acted on by the medium 300, and the respective first background radiation measurement signals formed by the radiation of the background environment radiation being detected by each detection device 120. The multiple detection devices 120 respectively receive the monitoring radiation measurement signals transmitted by the monitoring device 140. Based on the above, the multiple detection devices 120 can distinguish and distinguish the respective corresponding detection radiation measurement signals as the first radiation measurement signals. Whether it is a ray measurement signal 170 or a first background radiation measurement signal, if it is the first ray measurement signal 170, the corresponding detection device 120 considers that the detection ray measurement signal detected this time is valid; if it is the first background radiation measurement signal, the corresponding detection device 120 deletes or ignores the detection ray measurement signal detected this time, and the corresponding detection device 120 records and saves the effective detection ray measurement signal (i.e., the first ray measurement signal 170) detected by it and analyzes and processes it to obtain the measurement information of the first ray measurement signal 170. The main controller 130 can respectively receive the measurement information of the corresponding effective detection ray measurement signals (i.e., the first ray measurement signals) transmitted by multiple detection devices 120 and summarize and count them, so as to obtain the signal characteristics after summary and count, and use the signal characteristics to obtain the density and concentration of the medium 300. The first ray measurement signal 170 formed by the first ray 150 detected by multiple detection devices 120 is equivalent to the effect of increasing the detection receiving area of ​​one detection device 120 for receiving the first ray 150, and can increase the ability and quantity of the captured first ray measurement signals 170. For a larger diameter of the measured container 200, when the concentration / density of the medium 300 increases or when the activity of the radiation source 112 in the radiation device 110 decreases, the first ray measurement signal 170 formed by the first ray 150 detected by multiple detection devices 120 in total will not be very weak in intensity / small in quantity and unable to be measured and analyzed, thereby ensuring the density / concentration measurement precision and measurement accuracy.

[0078] In some embodiments, when the measuring device 100 includes a plurality of detection devices 120, the plurality of detection devices 120 may be arranged along the extended height of the measured container 200. Thus, continuous material level measurement may be achieved by the measuring device 100, and relevant details may be found in the following application example 2.

[0079] Figure 4 FIG. 1 shows another structural example of the measuring device 100 according to an embodiment of the present disclosure. Figure 4As shown, the measuring device 100 includes a plurality of detection devices 120, and the plurality of detection devices 120 are all installed on the second side of the measured container 200 and are arranged along the extension height of the measured container 200. The plurality of detection devices 120 can detect radiation to form respective corresponding detection radiation measurement signals, wherein the respective corresponding detection radiation measurement signals include a first radiation measurement signal 170 formed after the first radiation 150 emitted by the detection radiation device 110 acts on the measured container 200 and the medium 300, and a first background radiation measurement signal formed by the radiation of the background environment radiation. The plurality of detection devices 120 respectively receive the monitoring radiation measurement signals transmitted by the monitoring device 140. Based on the above, the plurality of detection devices 120 can distinguish and differentiate whether the respective corresponding detection radiation measurement signals are the first radiation measurement signals 170 or the first background radiation measurement signals. If If it is the first ray measurement signal 170, the corresponding detection device 120 considers that the detection ray measurement signal detected this time is valid; if it is the first background radiation measurement signal, the corresponding detection device 120 deletes or ignores the detection ray measurement signal detected this time, and the corresponding detection device 120 records and saves the effective detection ray measurement signal (i.e., the first ray measurement signal 170) detected by it and analyzes and processes to obtain the measurement information of the first ray measurement signal 170. The main controller 130 can respectively receive the measurement information of the corresponding effective detection ray measurement signals (i.e., the first ray measurement signals) provided by multiple detection devices 120 and summarize and count them, so as to obtain the signal characteristics after summary and count, and obtain the density / concentration of the medium 300 in the measured container 200 and / or the material level of the medium 300 in the measured container 200 according to the signal characteristics after summary and count.

[0080] Figure 5 The structure of the measuring device of the embodiment of the present disclosure is shown in FIG. Figure 5 The specific structure of the measuring device 100 is exemplified.

[0081] Figure 5 An exemplary structure of the detection device 120 is shown. Figure 5As shown, the detection device 120 may include: a first scintillation material 121, a first photomultiplier tube 122, a first signal processing circuit 123, a first high-voltage stabilization module 124, a first power supply module 125, a first communication module 126 and a first processing module 127. Wherein, the first ray 150 and / or the ray of background environment radiation are incident on the first scintillation material 121, and the first scintillation material 121 generates an optical signal; the first scintillation material 121, the first photomultiplier tube 122, the first signal processing circuit 123, the first processing module 127 and the first communication module 126 are connected in sequence, the first communication module 126 is used to connect to the main controller 130, the first high-voltage stabilization module 124 is connected to the first photomultiplier tube 122, and the first power supply module 125 is used to connect to an external power supply to power the first scintillation material 121, the first photomultiplier tube 122, the first signal processing circuit 123, the first high-voltage stabilization module 124, the first processing module 127 and the first communication module 126.

[0082] See also Figure 5 As shown, the monitoring device 140 may include: a second scintillation material 141, a second photomultiplier tube 142, a second signal processing circuit 143, a second high-voltage stabilization module 144, a second power supply module 145, and a second communication module 146; wherein, the second ray 160 and / or the ray of background environmental radiation is incident on the second scintillation material 141, and the second scintillation material 141 generates a light signal; the second scintillation material 141, the second photomultiplier tube 142, the second signal processing circuit 143 and the second communication module 146 are connected in sequence, and the second communication module 146 is used to connect to the detection device 120; the second high-voltage stabilization module 144 is connected to the second photomultiplier tube 142, and the second power supply module 145 is used to connect to an external power supply and supply power to the second scintillation material 141, the second photomultiplier tube 142, the second signal processing circuit 143, the second high-voltage stabilization module 144, and the second communication module 146.

[0083] In some embodiments, the first power supply module 125 / the second power supply module 145 can be specifically used to receive the voltage provided by the main controller 130 (for example, the power supply circuit of the main controller 130) to power the first scintillation material 121 / the second scintillation material 141, the first photomultiplier tube 122 / the second photomultiplier tube 142, the first signal processing circuit 123 / the second signal processing circuit 143, the first high-voltage stabilization module 124 / the second high-voltage stabilization module 144, the first communication module 126 / the second communication module 146, and the first processing module 127, thereby ensuring the normal operation of the detection device 120 / the monitoring device 140.

[0084] In some embodiments, the first scintillating material 121 and the second scintillating material 141 may be the same or different. For example, the difference between the second scintillating material and the first scintillating material may include but is not limited to type, material, shape, etc. The scintillating material may be but is not limited to a plastic scintillator, a scintillating crystal, or other types. For example, when the scintillating material is a scintillating crystal, a packaging shell, a light guide, and an optical coupling agent are disposed on the outside thereof. The material of the packaging shell may be aluminum or stainless steel. The optical signal is transmitted to the photomultiplier tube through the light guide and the coupling agent.

[0085] Since the rays have energy, the first ray 150 and the second ray 160 generated by the radiation device 110 have the same energy, and the background environment radiation will also generate rays, wherein the rays generated by the background environment radiation include rays with the same energy as the first ray 150 and the second ray 160 and rays of other energies, and the rays generated by the background environment radiation will also be detected by the detection device 120 and the monitoring device 140. The detection device 120 needs to ignore or delete the rays generated by the background environment radiation to ensure the measurement precision and accuracy of the measuring device 100.

[0086] After the rays of various energies are incident on the scintillation material, the scintillation material will generate various light signals due to ionization and excitation. The higher the energy of the ray, the stronger the corresponding light signal. Therefore, the scintillation material will generate many light signals of different intensities. Each light intensity corresponds to a ray of energy, and various light signals are transmitted to the photomultiplier tube. The photomultiplier tube is provided with a multi-stage amplification system, which is used to accelerate and multiply the various light signals generated by the scintillation material under a high-voltage electric field, thereby converting various light signals into corresponding electrical signals. Since the photomultiplier tube is provided with a multi-stage amplification system, it is necessary to accelerate and multiply the incident light signal under a high-voltage electric field, so the gain of the photomultiplier tube is very large and it is very sensitive to the output voltage of the high-voltage generator. Therefore, the high-voltage stabilization module needs to provide a higher voltage and a stable output to prevent the high-voltage level offset from causing the gain offset of the photomultiplier tube. The high-voltage stabilization module can be specifically used to stably output a higher voltage to the photomultiplier tube, ensuring that a high and stable voltage is provided to the photomultiplier tube to prevent the phenomenon of high-voltage instability causing the gain offset of the photomultiplier tube. The high-voltage stabilization module may include a voltage divider, a high-voltage generator, and a voltage control and feedback circuit. The high voltage generator is connected to the voltage control and feedback circuit, the output end of the high voltage generator is connected to the voltage divider, the voltage divider is connected to the photomultiplier tube, the high voltage generator generates and outputs voltage, the voltage control and feedback circuit detects the voltage output by the high voltage generator and realizes the regulation and control of the voltage output by the high voltage generator through feedback, ensures the stability of the output voltage of the high voltage generator, and then distributes the voltage output by the high voltage generator to each dynode of the photomultiplier tube through the voltage divider, and makes each dynode have a suitable voltage gradient distribution. The signal processing circuit can be used to obtain a narrow pulse signal after at least pre-amplification, impedance matching, filtering and shaping of each electrical signal. The signal processing circuit includes: a preamplifier and a filtering and shaping circuit. Each electrical signal from the photomultiplier tube is pre-amplified and impedance matched by the preamplifier to form a tail-shaped pulse signal. The tail-shaped pulse signal is shaped after the filtering and shaping circuit acts, and there is no tailing phenomenon, thereby obtaining a narrow pulse signal. Here, the filtering shaping circuit can be used to pre-process the amplitude, baseline, etc. of the pulse signal to obtain a narrow pulse signal. The ray measurement signal mentioned above is the narrow pulse signal mentioned here, wherein the first ray measurement signal formed by the first ray and the second ray measurement signal formed by the second ray are narrow pulse signals less than 10ms.

[0087] In some embodiments, the second communication module 146 transmits the radiation measurement signal from the monitoring device 140 to the first processing module 127. The first processing module 127 compares the monitoring radiation measurement signal (including the second radiation measurement signal and the second background radiation measurement signal) detected by the monitoring device 140 with the monitoring radiation measurement signal (including the first radiation measurement signal and the first background radiation measurement signal) detected by the detection device 120. If the time when the monitoring radiation measurement signal and the detection radiation measurement signal are generated is simultaneous or the time interval is less than or equal to the first preset value, it is considered that the monitoring radiation measurement signal and the detection radiation measurement signal received by the monitoring device 140 and the detection device 120 are generated by the radiation. The second ray 160 generated by the irradiation device 110 and the second ray measurement signal 180 and the first ray measurement signal 170 formed by the first ray 150, the detection ray measurement signal detected by the detection device 120 this time is valid, that is, the first ray measurement signal 170, the detection device 120 records and saves the valid detection ray measurement signal (first ray measurement signal 170) detected this time and obtains the measurement information corresponding to the valid detection ray measurement signal (first ray measurement signal 170) through processing and analysis by the first processing module 127, and then transmits it to the main controller 130 through the first communication module 126, otherwise the detection device 120 ignores or deletes the detection ray measurement signal detected this time.

[0088] In some embodiments, the first processing module 127 of the detection device 120 can be specifically used to sample the narrow pulse signal (first ray measurement signal 170) to obtain sampling data, analyze, process, identify and record the sampling data to form the measurement information of the narrow pulse signal (first ray measurement signal 170), so as to transmit the measurement information of the narrow pulse signal (first ray measurement signal 170) to the main controller 130 through the first communication module 126, wherein the measurement information of the narrow pulse signal (first ray measurement signal 170) includes at least one of the waveform of the first ray measurement signal, the amplitude of the first ray measurement signal, the width of the first ray measurement signal, the energy of the first ray measurement signal, the time when the first ray measurement signal is generated, the channel address information, the number of accumulated counts of each channel address, the occurrence time of each count of each channel address, the time frequency of each channel address count, and the time interval of each channel address count. Here, the first processing module 127 can be but is not limited to an MCU, and the sampling of the narrow pulse shaped signal (first ray measurement signal 170) can be realized through the AD sampling function of the MCU.

[0089] Usually, the first processing module 127, such as an MCU, uses the number of data bits for sampling to determine the total number of channel address information. For example, for 12-bit AD sampling, the total number of channel address information is 4096; for 10-bit AD sampling, the total number of channel address information is 1024; and for 8-bit AD sampling, the total number of channel address information is 256. Therefore, the data bits of AD sampling should not be too large or too small. If the data bits are too large, the channel width (the interval between each channel address information number) will be smaller, so that the count corresponding to each channel address information number will decrease, the statistical fluctuation will increase or the measurement time will increase; if the data bits are too small, the channel width will be too large, causing the energy spectrum to be distorted and the resolution to deteriorate. Therefore, an MCU with a suitable number of AD sampling data bits can be flexibly selected as the first processing module 127 according to needs. The greater the ray energy, the stronger the corresponding optical signal, so that the peak amplitude of the narrow pulse signal is also higher, the greater the value obtained by the sampled data, and the greater the number of channel address information corresponding to the value.

[0090] The detection device 120 records and stores detection ray measurement signals (i.e., valid narrow pulse signals or first ray measurement signals 170) whose amplitude peak values ​​are the same or have little difference. The signals are classified according to the amplitude peak values ​​by the first processing module 127. Each amplitude peak value corresponds to a channel address information number. The valid detection ray measurement signal (i.e., valid narrow pulse signal or first ray measurement signal 170) of each amplitude peak value is recorded to the corresponding channel address information number, i.e., the count on the corresponding channel address information number is increased by 1. As time accumulates, the larger the accumulated count value on the track information number is, the greater the number of detection ray measurement signals (i.e., valid narrow pulse signals or first ray measurement signals 170) whose amplitude peaks correspond to the track information number is, which means that the number of first rays 150 incident on the scintillation material is greater. The detection device 120 counts the number of accumulated counts on each track information number within a preset time (the specific preset time can be set according to actual conditions) and transmits it to the main controller 130. The main controller 130 can form an effective ray energy spectrum curve based on the number of accumulated counts on each track information number transmitted by the detection device 120. Figure 6 is an example diagram of an effective ray energy spectrum curve according to some embodiments of the present disclosure.

[0091] Figure 7The exemplary structure of the main controller 130 in the measuring device 100 is shown. The main controller 130 may include: a third processing module 131 and a third communication module 132. The third communication module 132 is used to receive the measurement information of the effective detection ray measurement signal (first ray measurement signal 170) corresponding to the detection device 120 transmitted by the first communication module 126, and transmit the measurement information to the third processing module 131. The third processing module 131 obtains the signal characteristics corresponding to the first ray measurement signal 170 according to the measurement information of the effective detection ray measurement signal (first ray measurement signal 170), wherein the signal characteristics at least include ray intensity, ray quantity, and ray attenuation, and obtains the density, concentration and / or material level of the medium 300 according to the signal characteristics of the first ray measurement signal and the first corresponding relationship.

[0092] In some embodiments, the third processing module 131 stores a first corresponding relationship, and the first corresponding relationship may include one or more of the following: a corresponding relationship between the signal feature and the density of the medium 300, a corresponding relationship between the signal feature and the concentration of the medium 300, and a corresponding relationship between the signal feature and the material level of the medium 300. Thus, the third processing module 131 obtains the signal feature of the first ray measurement signal according to the measurement information of the first ray measurement signal, and obtains the density, concentration and / or material level of the medium 300 according to the signal feature of the first ray measurement signal and the first corresponding relationship. The third communication module 132 provides the density, concentration and / or material level of the medium 300 to an external device such as a field control system or an internal component such as a display device, so that the field control system can adjust and deploy related / subsequent processes according to the density, concentration and / or material level of the medium 300, or the operator can view the status of the medium in real time. In addition, the third communication module 132 can also transmit the effective ray energy spectrum curve formed by the main controller 130 to an external device such as a display device and other internal components for curve display.

[0093] In some embodiments, the main controller 130 may further include a power supply circuit 133, which is connected to the first power supply module 125 and the second power supply module 145 and is used to supply power to the detection device 120 and the monitoring device 140. Thus, the main controller 130 may supply power to other components in the measuring device 100.

[0094] In some embodiments, the main controller 130 may also include: a display device 134, which is connected to the third communication module 132, and is used to display the density, concentration and / or material level of the medium 300 transmitted by the third communication module 132, so that the user can understand the condition of the medium 300 in real time; it can also display the effective ray energy spectrum curve formed by the main controller 130.

[0095] In some embodiments, the signal output by the third communication module of the main controller 130 may be, but is not limited to, a current signal, a switch signal, a 485 communication signal, etc., that is, information such as the concentration, density and / or material level of the medium may be transmitted through, for example, a current signal, a switch signal, a 485 communication signal, etc.

[0096] In addition, the main controller 130 may further include components such as a speaker 135 for outputting the density, concentration and / or material level of the medium 300, reminder signals, etc. by voice or other means.

[0097] It should be noted that Figure 5 and Figure 7 This is just an example. In a specific implementation, the detection device 120, the main controller 130 and the monitoring device 140 may also be implemented by other structures.

[0098] In some embodiments, the third processing module 131 of the main controller 130 obtains the signal characteristics corresponding to the first ray measurement signal 170 based on the measurement information of the effective detection ray measurement signal, that is, based on the measurement information of the first ray measurement signal 170, preferably, it can be obtained through the effective ray energy spectrum curve.

[0099] 1) Determine the signal characteristics of the first ray measurement signal according to the energy spectrum peak of the effective ray energy spectrum curve, thereby obtaining the density, concentration and / or material level of the medium 300.

[0100] The main controller 130 performs a peak search operation on the formed effective ray energy spectrum curve to determine the track address information number where the peak value on the effective ray energy spectrum curve is located. The accumulated number on the track address information number is the size of the energy spectrum peak. The size of the peak value of the effective ray energy spectrum curve corresponds to the ray intensity information and / or ray quantity information and / or ray attenuation information of the first ray measurement signal 170. Therefore, the signal characteristics (ray intensity and / or ray quantity and / or ray attenuation) of the first ray measurement signal 170 can be determined by the peak value of the effective ray energy spectrum curve, that is, the signal characteristics of the first ray measurement signal 170 detected by the detection device 120 after the first ray 150 generated by the radiation device 110 is acted on by the medium 300 can be determined by the peak value of the effective ray energy spectrum curve, so as to obtain the density, concentration and / or material level of the medium 300.

[0101] 2) Calculate the peak area according to the peak boundary of the peak value of the effective ray energy spectrum curve, and determine the signal characteristics of the first ray measurement signal 170 according to the peak area, so as to obtain the density, concentration and / or material level of the medium 300.

[0102] The main controller 130 performs a peak search operation on the formed effective ray energy spectrum curve to determine the channel address information number where the peak value on the effective ray energy spectrum curve is located. Since the hardware equipment may have some sampling errors, hardware device measurement errors, etc., the amplitude peak of the effective detection ray measurement signal (first ray measurement signal 170) may sometimes have some deviations, so that it is not always recorded on the same channel address information number, but on the channel address information number near the channel address information number where the peak value is located. Therefore, the peak boundary is determined according to the peak shape of the peak (that is, the starting channel address information number and the ending channel address information number of the peak are determined), and then the peak area is calculated. The size of the peak area corresponds to the signal characteristics of the first ray measurement signal (ray intensity and / or number of rays and / or ray attenuation). Therefore, the signal characteristics (ray intensity and / or ray quantity and / or ray attenuation) of the first ray measurement signal can be determined by the peak area size of the effective ray energy spectrum curve, that is, the signal characteristics of the first ray measurement signal 170 detected by the detection device 120 after the first ray 150 generated by the radiation device 110 is acted on the medium 300 can be determined by the peak area size of the effective ray energy spectrum curve, so as to obtain the density, concentration and / or material level of the medium 300. Figure 8 An example diagram showing the peak value and peak area in the effective ray energy spectrum curve.

[0103] Fig. 9 A flow chart of a measurement method of some embodiments of the present disclosure is shown, and the measurement method can be applied to the aforementioned measurement device 100. The measurement method can be used to measure information such as density, concentration and / or material level of a medium in a container such as a container or a pipe without contact, and is not affected by working conditions such as high temperature, high pressure, dust, and high toxicity. In addition, the first ray measurement signal 170 and the second ray measurement signal 180 corresponding to the first ray 150 and the second ray 160 simultaneously generated by the radiation device, which have the same energy and opposite collinear directions, can be effectively eliminated by determining whether they are generated simultaneously or the time interval is less than or equal to the first preset value (whether they are synchronous), thereby improving the measurement accuracy of the measurement device 100.

[0104] The measurement method S70 may include the following steps:

[0105] Step S72, the radiation device generates the first ray and the second ray at the same time, the detection device detects the ray to form a detection ray measurement signal, wherein the detection ray measurement signal includes a first ray measurement signal formed after the first ray passes through the container to be tested and the medium, and a first background radiation measurement signal formed by the radiation of the background environment radiation; the monitoring device detects the ray to form a monitoring ray measurement signal, wherein the monitoring ray measurement signal includes a second ray measurement signal formed when the second ray is directly detected, and a second background radiation measurement signal formed by the radiation of the background environment radiation;

[0106] Step S74, the detection device receives the monitoring ray measurement signal transmitted by the monitoring device, and compares the detection ray measurement signal with the monitoring ray measurement signal. If the generation time of the detection ray measurement signal and the generation time of the monitoring ray measurement signal are simultaneous or the time interval is less than or equal to the first preset value, it is considered that the detection ray measurement signal detected by the detection device this time is a first ray measurement signal corresponding to the first ray generated by the radiation device, and the monitoring ray measurement signal detected by the monitoring device this time is a second ray measurement signal corresponding to the second ray generated by the radiation device, and is not a first background radiation measurement signal generated by the background environment radiation. That is, the detection ray measurement signal detected by the detection device this time is valid and is a first ray measurement signal. Otherwise, the detection device deletes or ignores the detection ray measurement signal detected this time.

[0107] Step S76, the detection device records and stores the first ray measurement signal detected this time and analyzes and obtains measurement information of the first ray measurement signal;

[0108] Step S78: The main controller receives the measurement information of the first ray measurement signal transmitted by the detection device, and obtains the density, concentration and / or material level of the medium according to the measurement information of the first ray signal.

[0109] In some embodiments, step S78 may include:

[0110] Step a1, obtaining a signal characteristic of the first ray measurement signal according to measurement information of the first ray measurement signal, wherein the signal characteristic includes ray intensity and / or ray quantity and / or ray attenuation;

[0111] Step a2, determining the density, concentration and / or material level of the medium according to the signal characteristics of the first ray measurement signal and a predetermined first corresponding relationship; wherein the first corresponding relationship may include one or more of the following: a corresponding relationship between the signal characteristics and the medium density, a corresponding relationship between the signal characteristics and the medium concentration, and a corresponding relationship between the signal characteristics and the medium material level. The first corresponding relationship may be obtained through experimental experience or through on-site calibration.

[0112] In some embodiments, step a1 in step S78 may include: determining the channel address information number where the peak value corresponding to the first ray measurement signal is located based on the effective ray energy spectrum curve; obtaining the signal characteristics of the first ray measurement signal according to the peak value corresponding to the channel address information number, and the signal characteristics may include one or more of the following: ray intensity, ray quantity, and ray attenuation.

[0113] In some embodiments, step a1 in step S78 may further include: determining the channel address information number of the peak corresponding to the first ray measurement signal based on the effective ray energy spectrum curve, and determining the peak boundary according to the peak shape of the peak (i.e. determining the starting channel address information number and the ending channel address information number of the peak), thereby calculating the peak area according to the peak boundary, and the size of the peak area corresponds to the signal characteristics of the first ray measurement signal.

[0114] Based on the above-mentioned embodiments and measurement methods, in some embodiments, due to the radiation source 22 Na has a decay period, and the decay period is fast. As time goes by, the isotope radioactive source 22 The lower the activity of Na, the weaker the signal generated, which will make the measurement data less reliable. 22 Calculation of Na installation and use time 22 The remaining activity of Na can be used to replace the radioactive source, but due to 22The decay time of Na is not a constant value and is not completely consistent. Therefore, replacing the radiation source according to the installation and use time may cause a waste of radiation source resources. The monitoring device 140 can be used to directly monitor the radiation function of the radiation device 110, such as the detection of the activity of the radiation source, which can well avoid such a situation. In this embodiment, the monitoring device 140 includes the second scintillation material 141, the second photomultiplier tube 142, the second signal processing circuit 143, the second high-voltage stabilization module 144, the second power supply module 145, and the second communication module 146 mentioned above, and can also include a second processing module (not shown in the figure). The second processing module can monitor the radiation function of the radiation device 110 according to the measurement information of the second ray measurement signal 180, and send radiation failure information to the main controller 130 through the second communication module 146 when the radiation function of the radiation device 110 fails, so that the main controller 130 sends a reminder signal to the user. Here, the second communication module 146 is connected to the main controller 130, and is specifically used to transmit the radiation failure information of the second processing module to the main controller 130. The second processing module of the monitoring device 140 of this embodiment selects a suitable number of sampling data bits. The monitoring device 140 monitors the monitoring ray measurement signal formed by the second ray 160 and the ray radiated by the background environment, including the second ray measurement signal formed by the second ray 160 and the second background radiation measurement signal formed by the ray radiated by the background environment. Since the ray radiated by the background environment has many energy categories, that is, many energy categories of ray will be incident on the second scintillation material 141 of the monitoring device 140, the greater the ray energy, the stronger the light signal generated by the corresponding second photomultiplier tube 142, and thus the peak amplitude of the narrow pulse signal (monitoring ray measurement signal) formed by the second signal processing circuit 143 is also higher, the greater the value obtained by the sampling data, and the greater the number of the channel address information corresponding to the value, that is, the channel address information number corresponds to the ray energy, the greater the ray energy, the greater the channel address information number, so the channel address information number can be converted into the energy of the ray according to the energy scale factor. The narrow pulse signal (monitoring ray measurement signal) is classified according to the size of the amplitude peak value, each amplitude peak value corresponds to a channel address information number, and each type of narrow pulse signal (monitoring ray measurement signal) is recorded on the corresponding channel address information number, that is, the count on the corresponding channel address information number is added by 1. The second processing module of the monitoring device 140 obtains the number of cumulative counts on each channel address information number within a preset time (the specific preset time can be set according to actual conditions), and the ray full energy spectrum curve can be formed. Fig.10 is an example diagram of a full energy spectrum curve of rays according to some embodiments of the present disclosure.

[0115] The second processing module of the monitoring device 120 has an MCU or CPU processor. Within a preset time, as time accumulates, the larger the accumulated count value on the channel information number, the more narrow pulse signals (monitoring ray measurement signals) with a peak amplitude value of the channel information number, and the more rays of corresponding energy incident on the second scintillation material 141. In other words, the accumulated value on the channel information number corresponding to the second ray 160 generated by the radiation device 110 is the largest, which is the channel information number where the peak value of the formed ray full energy spectrum curve is located, that is, the channel information number where the peak value on the ray full energy spectrum curve is located corresponds to the energy ray (second ray) generated by the radiation device 110, and the size of the peak value corresponding to the channel information number corresponds to the ray intensity information and / or ray quantity information and / or ray attenuation information of the second ray measurement signal. Therefore, the signal characteristics (ray intensity and / or ray quantity and / or ray attenuation) of the second ray measurement signal can be determined by the peak value of the ray full energy spectrum curve.

[0116] The second processing module analyzes and processes the monitoring ray measurement signal to obtain measurement information of the monitoring ray measurement signal, and obtains the signal characteristics of the second ray measurement signal according to the measurement information of the second ray measurement signal in the measurement information of the monitoring ray measurement signal, so as to judge the radiation function of the monitoring radiation device 110 according to the signal characteristics of the second ray measurement signal (ray attenuation and / or number of rays and / or ray intensity). The greater the ray attenuation and / or the smaller the ray intensity and / or the fewer the number of rays, the weaker the radiation function of the radiation device 110. When the ray intensity is less than the second preset value, the number of rays is less than the third preset value and / or the ray attenuation is greater than the fourth preset value, it is considered that the radiation function of the radiation device 110 has failed, that is, the activity of the radiation source is too low or has failed.

[0117] When the activity of the radioactive source is too low or fails, a first prompt may be sent to the main controller 130, and the main controller 130 reminds the user to replace the radioactive source according to the first prompt transmitted by the monitoring device 140. Therefore, when the activity of the radioactive source in the radiation device 110 is too low or fails, the main controller 130 may be provided with a speaker 135, and the speaker 135 outputs an alarm signal, or the main controller 130 prompts the operator to replace the radioactive source through the display device 134.

[0118] The present disclosure also provides the following detection method, which can be applied to the aforementioned measuring device 100, comprising at least a radiation device 110 and a monitoring device 140, wherein the monitoring device comprises a second processing module for detecting the radiation function (activity of the radiation source) of the radiation device 110 of the measuring device 100.

[0119] See also Fig.11 As shown, the detection method 1000 may include the following steps:

[0120] Step S102, emitting a second ray 160 directly to the monitoring device 140 through the radiation device 110;

[0121] Step S104, detecting a monitoring ray measurement signal formed by the monitoring device 140, wherein the monitoring ray measurement signal includes a second ray measurement signal 180 formed by directly detecting the second ray 160 and a second background radiation measurement signal formed by the radiation of the background environment radiation;

[0122] Step S106, the monitoring device 140 (for example, the second processing module of the monitoring device 140) analyzes and processes the monitoring ray measurement signal to obtain measurement information of the monitoring ray measurement signal;

[0123] Step S108, the monitoring device 140 detects the activity of the radiation source in the radiation device according to the measurement information of the second radiation measurement signal in the monitoring radiation measurement signal, and determines whether the activity of the radiation source in the radiation device 110 is too low or ineffective;

[0124] Step S101, when the activity of the radiation source is too low or fails, a reminder signal is issued.

[0125] In some embodiments, step S108 may include:

[0126] Step c1, obtaining a signal characteristic of the second ray measurement signal according to measurement information of the second ray measurement signal, the signal characteristic of the second ray measurement signal including one or more of the following: ray intensity, ray quantity, and ray attenuation;

[0127] Based on the above content, the second processing module of the monitoring device 140 obtains the ray full energy spectrum curve, and performs a peak search operation on the ray full energy spectrum curve to determine the track address information number where the peak value on the ray full energy spectrum curve is located. The track address information number where the peak value on the ray full energy spectrum curve is located corresponds to the energy ray (second ray 160) generated by the radiation device 110, and the size of the peak value corresponds to the ray intensity and / or ray quantity and / or ray attenuation of the second ray measurement signal. Therefore, the signal characteristics (ray intensity and / or ray quantity and / or ray attenuation) of the second ray measurement signal 180 can be determined by the peak value of the ray full energy spectrum curve. Alternatively, the second processing module of the monitoring device 140 performs a peak search operation on the ray full energy spectrum curve to determine the track address information number where the peak value on the ray full energy spectrum curve is located, the track address information number where the peak value on the ray full energy spectrum curve is located corresponds to the energy ray (second ray 160) generated by the radiation device 110, and the peak boundary is determined according to the peak shape of the peak value of the ray full energy spectrum curve (that is, the starting track address information number and the ending track address information number of the peak are determined), and then the peak area is calculated, and the size of the peak area corresponds to the signal characteristics of the second ray measurement signal (ray intensity and / or ray quantity and / or ray attenuation). Therefore, the signal characteristics of the second ray measurement signal (ray intensity and / or ray quantity and / or ray attenuation) can be determined by the size of the peak area of ​​the ray full energy spectrum curve. Fig.12 An example diagram showing the peak value and peak area in the full energy spectrum curve of the radiation.

[0128] Step c2: Based on the signal characteristics of the second ray measurement signal, the monitoring device 140 determines whether the radiation function of the radiation device 110 fails, that is, whether the activity of the radiation source is too low or fails and needs to be replaced.

[0129] In some embodiments, step c2 may include: when the ray intensity is less than the second preset value, the ray quantity is less than the third preset value, or the ray attenuation is greater than the fourth preset value, determining whether the activity of the radiation source in the radiation device 110 is too low or ineffective. Thus, by combining the ray intensity, the ray quantity and / or the ray attenuation with the corresponding set values, it is possible to detect in real time whether the activity of the radiation source in the radiation device 110 is too low or ineffective, and when the activity of the radiation source is too low or ineffective, it can be regarded that the radiation function of the radiation device 110 has failed.

[0130] In some embodiments, step S110 may include: the monitoring device 140 issues a first prompt message, and the first prompt is transmitted to the main controller 130, so that when the activity of the radiation source in the radiation device 110 is too low, the speaker 135 of the main controller 130 outputs an alarm signal or the display device 134 of the main controller 130 displays a signal to prompt / remind the operator / user to replace the radiation source.

[0131] At the same time, other faults can also be detected for the radiation device 110. Due to the particularity of the radiation source, when the radiation source in the radiation device 110 is taken away or lost, the radiation intensity, radiation quantity and / or radiation attenuation of the second radiation measurement signal 180 will be greatly different from before or in other situations, so it can be judged whether the radiation source in the radiation device 110 is taken away or lost. When the radiation source in the radiation device 110 is taken away or lost, the radiation function of the radiation device fails.

[0132] See also Fig.13 As shown, the detection method 1100 may include:

[0133] Step S112, the radiation source 112 of the radiation device 110 emits a second ray 160 to the monitoring device 140;

[0134] Step S114, the monitoring device 140 detects radiation to form a monitoring radiation measurement signal, wherein the monitoring radiation measurement signal includes a second radiation measurement signal 180 formed by directly detecting the second radiation 160 and a second background radiation measurement signal formed by radiation of background environment radiation;

[0135] Step S116, the monitoring device 140 (eg, the second processing module of the monitoring device 140) analyzes and processes the monitoring ray measurement signal to obtain measurement information of the monitoring ray measurement signal;

[0136] In step S118 , the monitoring device 140 detects whether the radiation source in the radiation device is lost according to the measurement information of the second ray measurement signal 180 in the monitoring ray measurement signal.

[0137] In some embodiments, step S118 may include: obtaining the signal characteristics of the second ray measurement signal according to the measurement information of the second ray measurement signal, the signal characteristics of the second ray measurement signal including one or more of the following: ray intensity, ray quantity, ray attenuation; when the ray intensity is less than the first lower limit value, or the ray quantity is less than the second lower limit value, or the ray attenuation is greater than the first upper limit value, determining that the radiation source in the radiation device is lost. Thus, the ray intensity, ray quantity and / or ray attenuation can be combined with the corresponding upper and lower limits to monitor in real time whether the radiation source in the radiation device 110 has been lost or taken away. When the radiation source is lost or taken away, it can be regarded as a failure of the radiation source and a failure of the radiation function of the radiation device 110.

[0138] In some embodiments, step S118 may include: the monitoring device 140 issues a second prompt message, and the second prompt message can be transmitted to the main controller 130. Thus, after detecting that the radiation source in the radiation device 110 is taken away or lost, the speaker 135 of the main controller 130 outputs a corresponding alarm signal or the display device 134 of the main controller 130 displays to indicate that the radiation source is lost.

[0139] In addition, the radiation device 140 can also be used to detect the offset of the radiation energy spectrum to calibrate or correct the measurement results. During the measurement and use process, the radiation energy spectrum may be offset due to factors such as deliquescence and temperature of the scintillation material, causing the channel address information number corresponding to the peak of the radiation energy spectrum to change accordingly. The monitoring device 140 records the historical radiation full energy spectrum curve and the channel address information number corresponding to the historical energy spectrum peak corresponding to the monitoring radiation measurement signal formed by its detection, and compares the radiation full energy spectrum curve formed by the detection at this time and the energy spectrum peak at this time with the historical radiation full energy spectrum curve and the historical energy spectrum peak to obtain the offset and / or peak offset of the radiation energy spectrum, thereby determining the value that needs to be adjusted for the peak corresponding to the peak boundary of the effective radiation energy spectrum curve formed by the measurement information of the effective detection radiation measurement signal (first radiation measurement signal 170) transmitted by the detection device 120 to the main controller 130, thereby changing The starting track address information number and the ending track address information number of the effective ray energy spectrum curve ensure that the peak area calculated using the energy spectrum peak of the effective detection ray measurement signal (first ray measurement signal 170) is not affected by the ray energy spectrum offset and / or peak offset, that is, the ray intensity, number of rays and / or ray attenuation are not affected by the ray energy spectrum offset and / or peak offset, thereby improving the accuracy of the signal characteristics of the first ray measurement signal, thereby calibrating or correcting the measurement results (that is, the concentration, density and / or material level of the medium), and further improving the measurement accuracy of information such as density, concentration, material level, etc.

[0140] Some application examples of the present disclosure are listed below.

[0141] Application example 1: The measuring device 100 is used as a switch level meter:

[0142] The installation position of the detection device 120 is a designated position, which corresponds to the early warning position of the material.

[0143] When the number of the detection device 120 is 1, the radiation device 110 and the detection device 120 are installed opposite to each other, and the first ray 150 emitted by the radiation device 110 is directly opposite to the first scintillation material 121 of the detection device 120. At this time, the radiation device 110 and the detection device 120 can act as a switch level meter. When the material in the container rises to the position where the radiation device 110 and the detection device 120 are located, the first ray measurement signal 170 received by the detection device 120 will decrease, so that the ray attenuation information corresponding to the first ray measurement signal obtained by the main controller 130 will be enhanced, the ray intensity information corresponding to the first ray measurement signal will be weakened, or the ray quantity information corresponding to the first ray measurement signal will be reduced. Based on this, the main controller 130 outputs a signal indicating that the material has reached the designated or warning position. The signal output by the main controller 130 can be, but is not limited to, one of a current signal, a switch signal, and a 485 communication signal.

[0144] Application example 2: The measuring device 100 is used as a continuous level meter:

[0145] When there are multiple detection devices 120 and the multiple detection devices 120 are arranged along the extended height of the measured container 200, continuous material levels can be measured, rather than just playing the role of a switch level meter, a density meter, or a concentration meter.

[0146] When the measuring device 100 includes a plurality of detection devices 120, the plurality of detection devices 120 are arranged along the extended height of the measured container 200, such as Figure 4As shown, each detection device 120 receives radiation to form a corresponding detection radiation measurement signal, wherein the corresponding detection radiation measurement signal includes each first radiation measurement signal 180 formed by each detection device 120 after the first radiation emitted by the radiation device 110 is acted upon by the medium 300, and each first background radiation measurement signal formed by each detection device 120 detecting the radiation of the background environment radiation. In addition, the plurality of detection devices 120 respectively receive the monitoring radiation measurement signal transmitted by the monitoring device 140. Based on the above, the plurality of detection devices 120 can distinguish and differentiate whether the corresponding detection radiation measurement signal is the first radiation measurement signal 170 or the first background radiation measurement signal. If If it is the first ray measurement signal 170, the corresponding detection device 120 considers that the detection ray measurement signal detected this time is valid; if it is the first background radiation measurement signal, the corresponding detection device 120 deletes or ignores the detection ray measurement signal detected this time, and the corresponding detection device 120 records and saves the effective detection ray measurement signal (i.e., the first ray measurement signal 170) detected by it and analyzes and processes it to obtain the measurement information of the first ray measurement signal 170. The main controller 130 can respectively receive the measurement information of the corresponding effective detection ray measurement signals (i.e., the first ray measurement signals) transmitted by multiple detection devices 120 and summarize and count them, so as to obtain the signal characteristics after summary and counting, and use the signal characteristics to derive the material level. When the material level of the medium 300 in the measured container 200 increases, it means that the blocking effect of the medium 300 in the measured container 200 on the first ray emitted by the radiation device is enhanced, which will cause the total number of first ray measurement signals 180 detected by multiple detection devices 120 to decrease, and then cause the ray attenuation information corresponding to the first ray measurement signal 180 obtained by the main controller 130 to increase, the ray intensity information corresponding to the first ray measurement signal 180 to weaken, or the ray quantity information corresponding to the first ray measurement signal 180 to decrease. Based on this, the main controller 130 outputs a signal indicating the location of the medium 300 material level. The signal output by the main controller 130 may be, but is not limited to, one of a current signal and a 485 communication signal.

[0147] Application example three: the measuring device 100 is used as a densitometer / concentration meter to measure the density or concentration of the medium 300 .

[0148] In the description of this specification, in the absence of mutual contradiction, those skilled in the art may combine and combine the different embodiments / modes or examples described in this specification and the features of the different embodiments / modes or examples. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. Those skilled in the art should understand that the above-mentioned embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. For those skilled in the art, other changes or modifications may be made on the basis of the above disclosure, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A high-precision measurement device for radiation monitoring, characterized in that: include: A radiation device is installed on a first side of a container to be tested, wherein the container to be tested contains a medium; A detection device is installed on the second side of the container to be detected, and the first side is opposite to the second side; A monitoring device, mounted on the first side of the radiation device and connected to the detection device; The radiation device comprises a shell and a radiation source, wherein the shell encloses the radiation source, and the radiation source is used to simultaneously generate a first ray and a second ray that are collinear but in opposite directions; The housing comprises: a first emission channel, which faces the container to be tested so that the first ray generated by the radiation source passes through the container to be tested and enters the detection device after being acted upon by the medium; and a second emission channel, which faces the monitoring device so that the second ray generated by the radiation source directly enters the monitoring device; The detection device is used to detect the ray to form a detection ray measurement signal, and is used to detect the first ray to form a first ray measurement signal; The monitoring device is used to detect the ray to form a monitoring ray measurement signal, and is used to directly detect the second ray to form a second ray measurement signal; The detection device receives the monitoring ray measurement signal transmitted by the monitoring device, and compares the generation time of the detection ray measurement signal and the monitoring ray measurement signal. If the generation times of the two are simultaneous or the time interval is less than or equal to a first preset value, it is considered that the monitoring ray measurement signal detected by the monitoring device this time is the second ray measurement signal and the detection ray measurement signal detected by the detection device this time is the first ray measurement signal. It is determined that the detection ray measurement signal detected by the detection device this time is valid and is the first ray measurement signal. The detection device records and saves the first ray measurement signal detected this time, and then processes and analyzes it to obtain the measurement information of the first ray measurement signal. If the generation times of the two are not simultaneous or the time interval is greater than the first preset value, the detection device deletes or ignores the detection ray measurement signal detected this time.

2. The measuring device according to claim 1, characterized in that The radiation detected by the detection device includes at least the first radiation generated by the radiation device and radiation from the background environment, and the detection radiation measurement signal includes at least the first radiation measurement signal formed by the first radiation and the first background radiation measurement signal formed by radiation from the background environment; The radiation detected by the monitoring device includes at least the second radiation generated by the radiation device and radiation from the background environment, and the monitoring radiation measurement signal includes at least the second radiation measurement signal formed by the second radiation and the second background radiation measurement signal formed by radiation from the background environment; By comparing whether the generation time of the detection ray measurement signal is simultaneous with the generation time of the monitoring ray measurement signal or the time interval is less than or equal to the first preset value, the first ray measurement signal and the first background radiation measurement signal in the detection ray measurement signal are distinguished.

3. The measuring device according to claim 2, characterized in that The first radiation measurement signal and / or the second radiation measurement signal is a narrow pulse signal shorter than 10 ms.

4. The measuring device according to claim 3, characterized in that The measuring device further comprises a main controller, which is used to receive the measurement information of the first ray measurement signal transmitted by the detection device, and the main controller finally obtains the density, concentration and / or material level of the medium according to the measurement information of the first ray measurement signal; Among them, the measurement information of the first ray measurement signal at least includes one of the waveform of the first ray measurement signal, the amplitude of the first ray measurement signal, the width of the first ray measurement signal, the energy of the first ray measurement signal, the generation time of the first ray measurement signal, the channel address information, the number of accumulated counts of each channel address, the occurrence time of each count of each channel address, the time frequency of the count of each channel address, and the time interval of the count of each channel address.

5. The measuring device according to claim 4, characterized in that The number of the detection device is at least one, and the at least one detection device is installed on the second side surface of the container to be tested.

6. The measuring device according to claim 5, characterized in that If there are multiple detection devices, the multiple detection devices share a main controller, which receives the measurement information of the radiation measurement signals transmitted by each of the detection devices and determines the density, concentration and / or material level of the medium after summarizing and counting them.

7. The measuring device according to claim 5, characterized in that The detection device is one in number and is installed at the material warning position on the second side of the measured container, and is used for detecting whether the material level of the medium in the measured container is too high or too low.

8. The measuring device according to claim 1, characterized in that The first transmitting channel and the second transmitting channel are collinear and in opposite directions.

9. The measuring device according to claim 1, characterized in that The first emission channel and / or the second emission channel has a preset diffusion angle, which is used to make the first ray and / or the second ray have a preset radiation angle.

10. The measuring device according to claim 1, characterized in that The material forming the first emission channel and / or the second emission channel includes at least heavy metal.

11. The measuring device according to claim 10, characterized in that The heavy metal is lead.

12. The measuring device according to claim 9, characterized in that The diffusion angle of the second emission channel is greater than the diffusion angle of the first emission channel.

13. The measuring device according to claim 1, characterized in that The radiation device further includes a first switch component and / or a second switch component, wherein the first switch component is used to open or close the first emission channel, and the second switch component is used to open or close the second emission channel.

14. The measuring device according to claim 1, characterized in that The type of radiation source is 22 Nah.

15. The measuring device according to claim 14, characterized in that The activity of the radioactive source is less than 1*10 6 Bq is the immunity level.

16. The measuring device according to claim 4, characterized in that The detection device comprises: a first scintillation material, a first photomultiplier tube, a first signal processing circuit, a first high-voltage stabilization module, a first power supply module, a first communication module and a first processing module, wherein the first scintillation material, the first photomultiplier tube, the first signal processing circuit, the first processing module and the first communication module are connected in sequence, the first communication module is used to connect to the main controller; the first high-voltage stabilization module is connected to the first photomultiplier tube, and the first power supply module is used to connect to an external power supply; The monitoring device includes: a second scintillation material, a second photomultiplier tube, a second signal processing circuit, a second high-voltage stabilization module, a second power supply module and a second communication module, wherein the second scintillation material, the second photomultiplier tube, the second signal processing circuit and the second communication module are connected in sequence, and the second communication module is used to connect the detection device; the second high-voltage stabilization module is connected to the second photomultiplier tube, and the second power supply module is used to connect to an external power supply.

17. The measuring device according to claim 16, characterized in that The first scintillating material is the same as or different from the second scintillating material.

18. The measuring device according to claim 17, characterized in that The first scintillation material and the second scintillation material differ in at least one of type, material, and shape.

19. The measuring device according to claim 16, characterized in that The first scintillation material and / or the second scintillation material is a plastic scintillator or a scintillation crystal.

20. The measuring device according to claim 16, characterized in that The monitoring device also includes a second processing module, which is used to analyze and process the monitoring ray measurement signal to obtain measurement information of the monitoring ray measurement signal, wherein the measurement information of the monitoring ray measurement signal at least includes measurement information of the second ray measurement signal and measurement information of the second background radiation measurement signal, and the radiation function of the radiation device is detected according to the measurement information of the monitoring ray measurement signal, and the offset of the ray energy spectrum is detected according to the measurement information of the monitoring ray measurement signal to calibrate or correct the measured density, concentration and / or material level.

21. The measuring device according to claim 20, characterized in that The radiation function detection of the radiation device includes the detection of the radiation source activity of the radiation source in the radiation device and the detection of whether the radiation source in the radiation device is lost. When it is detected that the activity of the radiation source in the radiation device fails or the radiation source is lost, a prompt message is sent to the main controller through the second communication module so that the main controller reminds the user; the measurement information of the monitoring radiation measurement signal includes at least one of the waveform of the monitoring radiation measurement signal, the amplitude of the monitoring radiation measurement signal, the width of the monitoring radiation measurement signal, the energy of the monitoring radiation measurement signal, the generation time of the monitoring radiation measurement signal, the monitoring channel address information, the number of accumulated counts of each channel address, the occurrence time of each count of each channel address, the time frequency of each channel address count, and the time interval of each channel address count.

22. The measuring device according to claim 6, characterized in that The main controller comprises: A display module, used to at least display the density, concentration and / or material level of the medium to a user; A power supply circuit, the power supply circuit is used to receive external power supply and supply power to the detection device and / or the monitoring device; A third communication module, used for receiving output information transmitted by the first communication module and / or the second communication module, and for outputting signals to the display module and / or to an external field control system; The output signal is one of the following: current signal, switch signal, 485 communication signal.

23. A measurement method, characterized in that: The measurement is performed based on the measuring device according to any one of claims 1 to 22, and the measuring method comprises: The radiation device generates a first ray and a second ray simultaneously, and emits the first ray to the container under test and directly emits the second ray to the monitoring device; The detection device detects radiation to form a detection radiation measurement signal, the detection radiation measurement signal includes a first radiation measurement signal formed after the first radiation passes through the container to be tested and the medium, and a first background radiation measurement signal formed by radiation of background environment radiation; the monitoring device detects radiation to form a monitoring radiation measurement signal, the monitoring radiation measurement signal includes a second radiation measurement signal formed by directly detecting the second radiation, and a second background radiation measurement signal formed by radiation of background environment radiation; The monitoring ray measurement signal transmitted by the monitoring device is received by the detection device and the detection ray measurement signal is compared with the monitoring ray measurement signal. If the generation time of the detection ray measurement signal is simultaneous with the generation time of the monitoring ray measurement signal or the time interval is less than or equal to a first preset value, it is considered that the detection ray measurement signal detected by the detection device this time is a first ray measurement signal formed corresponding to the first ray generated by the radiation device, and the monitoring ray measurement signal detected by the monitoring device this time is a second ray measurement signal formed corresponding to the second ray generated by the radiation device. The detection device records and stores the first ray measurement signal formed this time and analyzes and obtains measurement information of the first ray measurement signal. Otherwise, the detection device deletes or ignores the detection ray measurement signal formed this time. The measurement information of the first ray measurement signal transmitted by the detection device is received by the main controller, and the density, concentration and / or material level of the medium is obtained according to the measurement information of the first ray measurement signal.

24. The measuring method according to claim 23, characterized in that: The obtaining the density, concentration and / or material level of the medium according to the measurement information of the first ray measurement signal comprises: The main controller obtains a signal characteristic of the first ray measurement signal according to measurement information of the first ray measurement signal; The main controller determines the density, concentration and / or material level of the medium according to the signal characteristics of the first ray measurement signal and a predetermined first corresponding relationship; Among them, the first corresponding relationship includes one or more of the following: the corresponding relationship between signal characteristics and medium density, the corresponding relationship between signal characteristics and medium concentration, and the corresponding relationship between signal characteristics and medium material level; the signal characteristics include one or more of the following: ray intensity, ray quantity, and ray attenuation.

25. The measuring method according to claim 24, characterized in that: The main controller obtains the signal characteristics of the first ray measurement signal according to the measurement information of the first ray measurement signal, including: obtaining a peak value corresponding to the first ray measurement signal according to the measurement information of the first ray measurement signal, and obtaining the signal characteristics of the first ray measurement signal according to the peak value of the first ray measurement signal.

26. The measuring method according to claim 25, characterized in that: The main controller obtains the signal characteristics of the first ray measurement signal based on the measurement information of the first ray measurement signal, including: obtaining the peak value of the first ray measurement signal based on the measurement information of the first ray measurement signal, thereby determining the peak boundary of the peak value of the first ray measurement signal to calculate the peak area, and determining the signal characteristics of the first ray measurement signal based on the peak area.

27. A detection method, characterized in that: The measuring device applied to any one of claims 1 to 22, wherein the monitoring device comprises a second processing module for detecting the activity of a radioactive source in the radiation device; The detection method comprises: The radiation source in the radiation device directly emits a second ray toward the monitoring device; The monitoring device detects radiation to form a monitoring radiation measurement signal, wherein the monitoring radiation measurement signal includes a second radiation measurement signal formed by directly detecting the second radiation and a second background radiation measurement signal formed by radiation of background environment radiation; The monitoring device analyzes and processes the monitoring ray measurement signal to obtain measurement information of the monitoring ray measurement signal; The monitoring device detects the activity of the radiation source in the radiation device according to the measurement information of the second radiation measurement signal in the monitoring radiation measurement signal, and determines whether the activity of the radiation source in the radiation device is too low or ineffective.

28. The detection method according to claim 27, characterized in that: The monitoring device detects the activity of the radiation source in the radiation device according to the measurement information of the second ray measurement signal, including: Obtaining a signal feature of the second ray measurement signal according to measurement information of the second ray measurement signal, wherein the signal feature of the second ray measurement signal includes one or more of the following: ray intensity, ray quantity, and ray attenuation; When the ray intensity is less than the second preset value, or the ray quantity is less than the third preset value, or the ray attenuation is greater than the fourth preset value, it is determined that the activity of the radiation source in the radiation device is too low or has failed.

29. A detection method, characterized in that: The measuring device applied to any one of claims 1 to 22, wherein the monitoring device comprises a second processing module for detecting whether a radiation source in the radiation device is lost; The detection method comprises: The radiation source in the radiation device directly emits a second ray toward the monitoring device; The monitoring device detects radiation to form a monitoring radiation measurement signal, wherein the monitoring radiation measurement signal includes a second radiation measurement signal formed by directly detecting the second radiation and a second background radiation measurement signal formed by radiation of background environment radiation; The monitoring device analyzes and processes the monitoring ray measurement signal to obtain measurement information of the monitoring ray measurement signal; The monitoring device detects whether the radiation source in the radiation device is lost according to the measurement information of the second ray measurement signal in the monitoring ray measurement signal.

30. The detection method according to claim 29, characterized in that: The monitoring device detects whether the radiation source in the radiation device is lost according to the measurement information of the second ray measurement signal in the monitoring ray measurement signal, including: Obtaining a signal feature of the second ray measurement signal according to measurement information of the second ray measurement signal, wherein the signal feature of the second ray measurement signal includes one or more of the following: ray intensity, ray quantity, and ray attenuation; When the radiation intensity is less than the first lower limit value, the radiation quantity is less than the second lower limit value, or the radiation attenuation is greater than the first upper limit value, it is determined that the radiation source in the radiation device is lost.

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