Multi-channel pipeline aerosol continuous monitoring system

Abstract

The invention relates to the technical field of aerosol monitoring, in particular to a multichannel pipeline aerosol continuous monitoring system. Comprising a sampling module, a measuring module and a control module which are sequentially communicated and connected through gas channels, the system further comprises a data processing module. Wherein the sampling module is used for sampling to-be-detected gas from a pipeline; the measuring module is used for measuring the radioactive activity and the concentration of aerosol of the sampled to-be-measured gas sample; the control module is used for performing on-off control on the gas circulation process in the sampling and measuring process; and the data processing module is used for setting parameters involved in the gas aerosol continuous monitoring process, processing the data and displaying the monitoring data. According to the multi-channel system designed by the invention, the air inlet does not need to be manually replaced to the to-be-detected pipeline, so that the cost is reduced, the contact between people and radioactive aerosol is avoided, and the safety of operators is ensured to a great extent.

Description

Technical Field

[0001] The invention relates to the technical field of aerosol monitoring, and in particular to a multi-channel pipeline aerosol continuous monitoring system. Background Art

[0003] The current similar systems have the following six problems:

[0004] First, the problem of untimely measurement. Radioactive aerosols are extremely harmful to the human body and are the main threat to human body radiation. They need to be monitored in real time and alarmed when the threshold is exceeded. The currently commonly used method of sampling first and then measuring has a large time lag and cannot meet the timeliness required for radioactive aerosol monitoring, which poses a safety hazard.

[0005] Second, the measured data is insufficient. Radioactive aerosol is a dispersed system formed by radioactive solid or liquid particles suspended in air or gas medium. The concentration is low. Measuring the radioactivity at only one point is not enough to reflect the real situation. It is necessary to measure as many points as possible at the same time to obtain more accurate real data.

[0006] Third, radioactive aerosols do not settle due to gravity and remain in the air for a long time, requiring monitoring equipment to operate for a long time to achieve the purpose of continuous monitoring of radioactive particles;

[0007] Fourthly, the data processing module of the radioactive aerosol monitoring system needs to collect the data sent back by the detector and flow meter, automatically back up the data after timely processing, and upload it to the Internet for subsequent data processing;

[0008] Fifth, the monitoring system is to monitor the radioactivity of pipeline aerosols and ensure the safety of surrounding personnel, so it will be placed in places with dense population. The system needs to reduce noise to prevent it from causing major interference to the work and life of surrounding personnel during operation.

[0009] Sixth, the complexity of the operating system and the security issues of the system and operators need to be resolved.

[0010] Considering safety and environmental protection, the real-time monitoring system of radioactive aerosols must have the characteristics of timely collection and measurement at multiple points, and have continuous and stable operation and networking functions to ensure accurate measured data, timely alarms, and overall safety of people, systems and the environment. In view of this, we proposed a multi-channel pipeline aerosol continuous monitoring system, which is a device for real-time monitoring and analysis of radioactive aerosol particles, and can be widely used in fields such as nuclear facility safety monitoring. Summary of the invention

[0011] The object of the present invention is to provide a multi-channel pipeline aerosol continuous monitoring system to solve the problems raised in the above background technology.

[0012] In order to solve the above technical problems, one of the purposes of the present invention is to provide a multi-channel pipeline aerosol continuous monitoring system, comprising a sampling module, a measuring module and a control module connected in sequence through a gas channel; and also comprising a data processing module; the sampling module, the measuring module and the control module are electrically connected to the data processing module through a power line and a data transmission line respectively; wherein:

[0013] The sampling module is used to sample the gas to be tested from the pipeline;

[0014] The measuring module is used to measure the radioactivity and concentration of the aerosol of the sampled gas to be tested;

[0015] The control module is used to control the on-off flow of gas during sampling and measurement, and ultimately control the emission of gas after measurement;

[0016] The data processing module is used to set parameters involved in the continuous monitoring of gas aerosols, process data and display the monitoring data.

[0017] As a further improvement of the technical solution, the sampling module includes a plurality of groups of sampling heads, a control unit and a plurality of differential pressure gauges connected in sequence;

[0018] The sampling head can be configured with multiple sampling channels for sampling multiple pipelines simultaneously; the sampling head is an isokinetic sampling module for isokinetic sampling of the gas to be tested in the pipeline;

[0019] The control unit includes a plurality of on-off elements respectively arranged on a plurality of sampling channels of the sampling head, and is used for starting and stopping sampling control of each sampling channel;

[0020] A plurality of differential pressure gauges are respectively connected between the rear end of the sampling channel corresponding to the sampling head and the rear end of the measuring module; the differential pressure gauge is used to upload data to the data processing module to determine whether the start and stop of the control unit is correct.

[0021] As a further improvement of the technical solution, the measurement module includes an aerosol particle collection unit and a detector unit; the detector unit includes a first detector and a second detector, and the aerosol particle collection unit is located between the first detector and the second detector;

[0022] The first detector is a PIPS semiconductor detector, located at the front end of the aerosol particle collection unit, and is used to detect α and β rays emitted by the aerosol particle collection unit and environmental γ rays;

[0023] The second detector is located at the rear end of the aerosol particle collection unit and detects only the ambient background gamma rays, so as to provide background compensation for the ambient gamma rays;

[0024] The detector unit transmits the measured radiation data to the data processing module as a basis for calculating the radioactivity.

[0025] As a further improvement of the technical solution, the control module includes a flow control unit, an air pump, a muffler and an air outlet which are sequentially connected through a gas channel;

[0026] The flow control unit is used to monitor and adjust the gas flow in the channel, and includes a flow meter and a regulating valve arranged in sequence from front to back; wherein:

[0027] The flow meter is used to transmit the monitored gas flow data to the data processing module as a basis for calculating the radioactivity concentration; the regulating valve is used to adjust the gas flow in the current sampling channel;

[0028] The air pump is used to extract the gas to be detected in each pipeline;

[0029] The muffler is used to eliminate the noise caused by gas flow;

[0030] The gas outlet is used to discharge the measured gas.

[0031] As a further improvement of the technical solution, the data processing module has a networking function. After receiving, processing and storing the measurement data from the measurement module and the flow meter, it can upload the data online and also receive online data.

[0032] The data processing module also includes a buzzer alarm. After comparing the processed data with the alarm threshold, the data processing module determines whether to turn on the buzzer alarm to give an alarm;

[0033] The data processing module also includes a touch screen for real-time display of α, β radioactivity and gas flow, and can also be manually set and perform various data viewing operations on the display interface.

[0034] As a further improvement of this technical solution, the calculation formula of the radioactivity is:

[0035] A=N1-N2

[0036] Where A is the radioactivity; N1 is the measurement value of the first detector, N1=∑(α+β+γ1), i.e. the sum of the number of α, β rays and environmental γ rays; N2 is the measurement value of the second detector, N2=γ2, i.e. the number of environmental background γ rays.

[0037] As a further improvement of the technical solution, in the calculation process of the radioactivity, the factors of time, detector efficiency and statistical error are introduced, and the calculation formula of the radioactivity is optimized as follows:

[0038]

[0039] Where p1 and p2 are the detector efficiency factors of the first detector and the second detector respectively; w t is the time weight, T is the total number of time periods, a is the detector correction coefficient, and B is the confidence interval.

[0040] As a further improvement of this technical solution, the calculation formula of the radioactivity concentration is:

[0041] C=A / Q

[0042] Among them, C is the radioactivity concentration, A is the radioactivity, and Q is the gas flow rate, which is measured by a flow meter.

[0043] As a further improvement of the technical solution, in the calculation process of the radioactivity concentration, the factors of time, detector efficiency and flowmeter accuracy, environment and statistical analysis optimization are introduced, and the calculation formula of the radioactivity concentration is optimized as follows:

[0044]

[0045] Wherein, d1 is the detector efficiency correction factor; d2 is the flowmeter accuracy correction factor; f1 and f2 are the environmental correction factors corresponding to the radioactivity and flow measurement, respectively; e1 is the radioactivity uncertainty, e2 is the gas flow uncertainty; w t1 、w t2 are the time weights corresponding to radioactive activity and gas flow rate respectively.

[0046] As a further improvement of the technical solution, the buzzer alarm includes two working modes, specifically:

[0047] The alarm thresholds include the minimum threshold and the maximum threshold; among which:

[0048] The minimum thresholds include the minimum threshold of radioactivity, the minimum threshold of radioactivity concentration, and the minimum threshold of gas flow;

[0049] The maximum thresholds include the maximum threshold of radioactivity, the maximum threshold of radioactivity concentration, and the maximum threshold of gas flow;

[0050] The two working modes of the buzzer alarm include: a fault alarm mode when the processed data is lower than the corresponding minimum threshold and a safety warning mode when the processed data is higher than the corresponding maximum threshold.

[0051] The second object of the present invention is to provide a method for continuous monitoring of aerosol in a multi-channel pipeline, based on the above-mentioned continuous monitoring system for aerosol in a multi-channel pipeline, comprising the following steps:

[0052] S1. After the whole system is powered on, the vacuum pump of the control module is turned on first, and the system is preheated for a period of time;

[0053] S2. The staff sets the sampling interval time, and the data processing module receives the sampling interval time signal, controls the control unit of the sampling module, and samples the aerosols in multiple pipelines one by one in sequence;

[0054] S3, the vacuum pump runs continuously, forming an air pressure difference at the sampling head corresponding to the opened control unit, so that the aerosol to be measured enters the sampling module, and flows through the measurement module and the control module in sequence, and finally exits the system after the muffler reduces the noise;

[0055] S4. The aerosol to be tested that enters the sampling module flows into the measuring module through the gas channel. The radioactive aerosol particles are deposited in the aerosol particle collection unit. The data processing module provides high and low pressures to the detector unit. The first detector located at the front end of the aerosol particle collection unit measures the α and β radiation of the deposited radioactive particles and the environmental γ rays. The second detector located at the rear end of the aerosol particle collection unit measures the environmental background γ rays. The radiation signals measured by the two detectors are all uploaded to the data processing module. After receiving the data, the data processing module processes the data to obtain the α and β radioactivity activities of the radioactive aerosol.

[0056] S5. The aerosol on which the radioactive particles have been deposited flows out of the measurement module and enters the control module. The flow rate is measured by the flow meter, and the gas flow data is uploaded to the data processing module. The data processing module combines the gas flow data with the α and β radioactivity activities to calculate the radioactivity concentration, and displays the radioactivity concentration and the gas flow data on the touch screen;

[0057] S6. The data processing module stores the collected radiation data, gas flow data, and processed radioactivity and radioactivity concentration data accordingly; while measuring and processing the radiation information in real time to obtain the radioactivity concentration, the radioactivity concentration and gas flow are compared and analyzed with the alarm threshold, and the buzzer alarm is immediately activated to warn when the threshold is exceeded.

[0058] The third object of the present invention is to provide a system control device, including a processor, a memory, and a computer program stored in the memory and running on the processor, wherein the processor is used to implement the above-mentioned multi-channel pipeline aerosol continuous monitoring system and its monitoring method steps when executing the computer program.

[0059] A fourth object of the present invention is to provide a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, it implements the above-mentioned multi-channel pipeline aerosol continuous monitoring system and its monitoring method steps.

[0060] Compared with the prior art, the present invention has the following beneficial effects:

[0061] 1. In the multi-channel pipeline aerosol continuous monitoring system, the data processing module automatically controls the opening and closing of the control unit of the multi-channel sampling module according to the set sampling time interval, so that the aerosols to be tested in multiple pipelines can be sampled separately, so that the radioactive aerosols to be tested in multiple pipelines are automatically collected and entered into the corresponding sampling heads in an unattended situation, and the multi-point sampling method is used to solve the problem that a single point is not enough to reflect the true situation of the radioactive aerosol;

[0062] 2. In the multi-channel pipeline aerosol continuous monitoring system, after the radioactive aerosol to be measured enters the sampling head, it flows into the measurement module, and the radioactive particles are deposited on the aerosol particle collection unit. The first detector measures the radiation of the radioactive particles, and the background data measured by the second detector are uploaded to the data processing module together, and the radioactive activity of the radioactive aerosol is calculated to complete the continuous monitoring of the radioactive aerosol;

[0063] 3. In the multi-channel pipeline aerosol continuous monitoring system, after the aerosol that has completed the radioactivity detection enters the control module, the flow meter monitors the gas flow and uploads the data to the data processing module to further calculate the radioactivity concentration of the radioactive aerosol; after the data processing of the detector and the flow meter is completed, the data processing module, on the one hand, backs up itself and uploads it to the network for post-processing analysis, and on the other hand, compares the processed radioactivity activity data and gas flow with the alarm threshold, and determines whether it is necessary to turn on the buzzer alarm to warn of exceeding the threshold, so as to ensure the safety of the system and personnel;

[0064] 4. In this multi-channel pipeline aerosol continuous monitoring system, after the aerosol completes all monitoring and before it is discharged from the system, the muffler reduces the noise caused by the airflow in the system to avoid causing large noise pollution to the surrounding environment. The entire system is very simple and easy to understand, and the full automatic control saves the operator's time cost;

[0065] 5. In the multi-channel pipeline aerosol continuous monitoring system, when arranging the system for actual application, compared with the single-channel system, when replacing the measuring pipeline in the later stage, manual replacement is required or each pipeline needs to be configured with a complete system. The multi-channel system does not need manual replacement of the air inlet to the pipeline to be tested. While reducing costs, it avoids contact between people and radioactive aerosols, and largely ensures the safety of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 is an exemplary overall system architecture diagram of the present invention;

[0067] Figure 2 This is one of the exemplary sampling module structure schematic diagrams of the present invention;

[0068] Figure 3 This is the second schematic diagram of the exemplary sampling module structure of the present invention;

[0069] Figure 4 is a schematic diagram of an exemplary measurement module structure in the present invention;

[0070] Figure 5 is a schematic diagram of an exemplary control module structure in the present invention;

[0071] Figure 6 It is a schematic diagram of an exemplary overall system structure in the present invention;

[0072] Figure 7 is a structural diagram of an exemplary electronic computer device in the present invention;

[0073] In the figure:

[0074] 100, sampling module; 101, sampling head; 102, control unit; 103, differential pressure gauge;

[0075] 200, measurement module; 201, aerosol particle collection unit; 202, detector unit; 2021, first detector; 2022, second detector;

[0076] 300, control module; 301, flow control unit; 3011, flow meter; 3012, regulating valve; 302, air pump; 303, muffler; 304, air outlet;

[0077] 400, data processing module; 401, buzzer alarm; 402, touch display screen. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0079] Example 1

[0080] like Figure 1-Figure 6 As shown, this embodiment provides a multi-channel pipeline aerosol continuous monitoring system, including a sampling module 100, a measuring module 200 and a control module 300 which are sequentially connected through a gas channel; and also includes a data processing module 400; the sampling module 100, the measuring module 200 and the control module 300 are electrically connected to the data processing module 400 through a power line and a data transmission line, respectively.

[0081] In this embodiment, the sampling module 100 is used to sample the gas to be tested from the pipeline;

[0082] Further, the sampling module 100 includes a plurality of groups of sampling heads 101, a control unit 102 and a plurality of differential pressure gauges 103 connected in sequence;

[0083] The sampling head 101 can be configured with multiple sampling channels for sampling multiple pipelines simultaneously; the sampling head 101 is an isokinetic sampling module for isokinetic sampling of the gas to be tested in the pipeline;

[0084] The control unit 102 includes a plurality of on-off elements respectively arranged on a plurality of sampling channels of the sampling head 101, and is used for starting and stopping sampling control of each sampling channel;

[0085] A plurality of differential pressure gauges 103 are respectively connected between the rear end of the sampling channel corresponding to the sampling head 101 and the rear end of the measuring module 200; the differential pressure gauges 103 are used to upload data to the data processing module 400 to determine whether the start and stop of the control unit 102 is correct.

[0086] The sampling module 100 can be divided into two structures according to the required sampling mode:

[0087] Structure 1: Figure 2As shown, the sampling head 101 includes a plurality of sampling channels, and the control unit 102 includes a plurality of on-off elements respectively arranged on each sampling channel of the sampling head 101, each on-off element can be switched on and off independently or synchronously; at the same time, each sampling channel of the sampling head 101 is independently provided with a differential pressure gauge 103, and the two ends of the differential pressure gauge 103 are respectively bridged between the rear end of the sampling channel of the sampling head 101 and the rear end of the measuring module 200; the rear ends of the plurality of sampling channels of the same sampling head 101 can be connected to the same gas channel and then connected to the measuring module 200, or they can be connected to independent measuring modules 200 respectively; in this structure, the number of the sampling channels on the sampling head 101, the on-off elements of the control unit 102 and the differential pressure gauge 103 are equal and connected one by one; during the operation of the sampling module 100 of this structure, a plurality of sampling channels can be opened simultaneously to perform mixed sampling of a plurality of pipelines, or each sampling channel can be opened synchronously and independently to perform sampling and monitoring operations respectively, thereby improving the monitoring efficiency;

[0088] Structure 2: Figure 3 As shown, the sampling head 101 includes a plurality of sampling channels, and the control unit 102 includes a plurality of on-off elements respectively arranged on the sampling channels of the sampling head 101, each on-off element can be switched on and off independently or synchronously; the rear ends of the plurality of sampling channels of the same sampling head 101 are connected to the same gas channel and then a differential pressure gauge 103 is installed, and the two ends of the differential pressure gauge 103 are respectively bridged between the rear end of the sampling head 101 and the rear end of the measuring module 200; in this structure, the sampling channels on the sampling head 101 and the on-off elements of the control unit 102 are equal and connected one-to-one, and the number of the differential pressure gauge 103 and the sampling head 101 is equal and connected one-to-one; during the operation of the sampling module 100 of this structure, multiple sampling channels can be opened at the same time to perform mixed sampling of multiple pipelines, or each sampling channel can be opened independently one by one to perform sampling. Although the working efficiency of this structure is low and the time consumption is long, the construction cost is low and the working precision is high, which can effectively avoid the situation of sampling confusion.

[0089] In this embodiment, the measurement module 200 is used to measure the radioactivity and concentration of the aerosol of the sampled gas to be tested;

[0090] Specifically, Figure 4 As shown, the measurement module 200 includes an aerosol particle collection unit 201 and a detector unit 202; the detector unit 202 includes a first detector 2021 and a second detector 2022, and the aerosol particle collection unit 201 is located between the first detector 2021 and the second detector 2022;

[0091] The first detector 2021 is a PIPS semiconductor detector, located at the front end of the aerosol particle collection unit 201, and is used to detect α and β rays emitted by the aerosol particle collection unit 201 and environmental γ rays;

[0092] The second detector 2022 is located at the rear end of the aerosol particle collection unit 201 and detects only the ambient background gamma rays to provide background compensation for the ambient gamma rays;

[0093] The detector unit 202 transmits the measured radiation data to the data processing module 400 to be used as a basis for calculating the radioactivity.

[0094] In this embodiment, the control module 300 is used to control the on-off flow of gas during sampling and measurement, and ultimately control the emission of gas after measurement;

[0095] Specifically, Figure 5 As shown, the control module 300 includes a flow control unit 301, an air pump 302, a muffler 303 and an air outlet 304 which are sequentially connected through a gas channel;

[0096] The flow control unit 301 is used to monitor and adjust the gas flow in the channel, and includes a flow meter 3011 and a regulating valve 3012 arranged in sequence from front to back; wherein:

[0097] The flow meter 3011 is used to transmit the monitored gas flow data to the data processing module 400 as a basis for calculating the radioactivity concentration; the regulating valve 3012 is used to adjust the gas flow in the current sampling channel;

[0098] The air pump 302 is used to extract the gas to be detected from each pipeline;

[0099] The muffler 303 is used to eliminate the noise caused by the gas flow;

[0100] The gas outlet 304 is used to discharge the measured gas.

[0101] In this embodiment, the data processing module 400 is used to set the parameters involved in the continuous monitoring process of gas aerosol, process the data and display the monitoring data;

[0102] Specifically, the data processing module 400 has a networking function, and after receiving, processing and storing the measurement data from the measurement module 200 and the flow meter 3011, it can upload the data online and also receive the networked data;

[0103] like Figure 6 As shown, the data processing module 400 also includes a buzzer alarm 401. After comparing the processed data with the alarm threshold, the data processing module 400 determines whether to turn on the buzzer alarm 401 to give an alarm;

[0104] The data processing module 400 also includes a touch screen display 402 for real-time display of α, β radioactive activities and gas flow rates, and manual settings and data viewing operations can also be performed on the display interface.

[0105] In this embodiment, the calculation formula of radioactivity is:

[0106] A=N1-N2

[0107] Wherein, A is the radioactivity; N1 is the measurement value of the first detector 2021, N1=∑(α+β+γ1), i.e., the sum of the number of α, β rays and environmental γ rays; N2 is the measurement value of the second detector 2022, N2=γ2, i.e., the number of environmental background γ rays (due to the existence of background radiation in the environment, in order to accurately obtain the radioactivity of the radioactive aerosol, it is necessary to compensate by subtracting the environmental background γ ray data measured by the second detector 2022 from the data measured by the first detector 2021).

[0108] Furthermore, in the calculation process of radioactivity, the factors of time, detector efficiency and statistical error are introduced, and the calculation formula of radioactivity is optimized as follows:

[0109]

[0110] Wherein, p1 and p2 are detector efficiency factors of the first detector 2021 and the second detector 2022 respectively; w t is the time weight, T is the total number of time periods, a is the detector correction coefficient, and B is the confidence interval;

[0111] The purpose of introducing the time factor is that if the detector's measurement is continuous, the time-weighted average of the measurement data within a period of time can reduce the impact of instantaneous fluctuations on the calculation of radioactivity; specifically, a period of time is divided into multiple segments according to the average, linear increase / decrease, random, etc., and the corresponding time weight is assigned to the measurement value within each period according to the proportion of each period;

[0112] The purpose of introducing detector efficiency is that if the working efficiency of the detector cannot reach 100% in real time, the efficiency factor of the detector for different types of radiation can be determined through preliminary calibration experiments; the correction coefficient is calculated and determined based on the correction and completion of the corresponding efficiency factor; in addition, the correction coefficient can also be adjusted according to the actual situation (such as considering the measurement environment, detector aging, etc.);

[0113] The purpose of introducing statistical errors is that since the data measured by the detector has statistical errors, statistical methods can be used to estimate the uncertainty of radioactivity, such as by calculating the standard deviation of the measured values, and thus determining the range of radioactivity based on the confidence interval.

[0114] In addition, the calculation process of radioactivity can be further optimized by combining other factors, such as considering the impact of environmental factors such as temperature and humidity on detector performance, and making corresponding corrections to the measured values; for example, a relationship model between temperature, humidity and detector efficiency can be established, and the radioactivity can be corrected according to the actual measured environmental parameters;

[0115] The physical properties of aerosols, such as particle size distribution, density, etc., can also be considered to adjust the calculation of radioactivity; for example, the effect of aerosols of different particle sizes and densities on radiation measurement can be determined experimentally, and then corrections can be made based on the actual aerosol properties.

[0116] Through the above optimization methods, the accuracy and reliability of radioactivity calculations can be improved, providing more precise data support for system monitoring and safety assessment.

[0117] In this embodiment, the radioactivity concentration refers to the radioactivity contained in a unit volume of gas; the calculation formula for the radioactivity concentration is:

[0118] C=A / Q

[0119] Wherein, C is the radioactivity concentration, A is the radioactivity, and Q is the gas flow rate, which is measured by flowmeter 3011.

[0120] Furthermore, in the process of calculating the radioactivity concentration, factors such as time, detector efficiency, flowmeter accuracy, environment and statistical analysis optimization were introduced, and the calculation formula of the radioactivity concentration was optimized as follows:

[0121]

[0122] Wherein, d1 is the detector efficiency correction factor; d2 is the flowmeter accuracy correction factor; f1 and f2 are the environmental correction factors corresponding to the radioactivity and flow measurement, respectively; e1 is the radioactivity uncertainty, e2 is the gas flow uncertainty; w t1 、w t2 are the time weights corresponding to radioactivity and gas flow, respectively;

[0123] The purpose of considering the time factor is to introduce time-weighted averaging, and calculate the radioactivity concentration after taking the time-weighted averaging of the radioactivity and gas flow data within a period of time;

[0124] When considering the detector efficiency and flow meter accuracy, it is necessary to calibrate the detector efficiency and flow meter accuracy first to determine the efficiency factor and accuracy correction factor;

[0125] When considering environmental factors, the main consideration is the impact of environmental factors such as temperature, humidity, and air pressure on the detector and flow meter, so as to establish a relationship model between environmental factors and measured values ​​in order to make corresponding corrections; among them, the environmental correction coefficients corresponding to radioactivity and flow measurement can be determined through experiments or theoretical models;

[0126] When considering statistical analysis optimization, it is necessary to first perform statistical analysis on the measurement data of radioactivity and gas flow to determine the confidence interval and uncertainty of the measurement value. By introducing uncertainty, the range and reliability of radioactivity concentration can be more accurately reflected.

[0127] In addition, the buzzer alarm 401 includes two working modes, specifically:

[0128] The alarm thresholds include the minimum threshold and the maximum threshold; among which:

[0129] The minimum thresholds include the minimum threshold of radioactivity, the minimum threshold of radioactivity concentration, and the minimum threshold of gas flow;

[0130] The maximum thresholds include the maximum threshold of radioactivity, the maximum threshold of radioactivity concentration, and the maximum threshold of gas flow;

[0131] The two working modes of the buzzer alarm 401 are a fault alarm mode when the processed data is lower than the corresponding minimum threshold and a safety warning mode when the processed data is higher than the corresponding maximum threshold.

[0132] Specifically, when any of the calculated radioactivity, radioactivity concentration or measured gas flow rate is lower than the corresponding minimum threshold, the buzzer alarm 401 enters the fault alarm mode and emits a corresponding buzzer sound. At this time, it is considered that the system is faulty and it is necessary to check whether there is a pipeline leak or other component damage;

[0133] When the measured gas flow rate is higher than the maximum gas flow rate threshold, the regulating valve 3012 automatically reduces the gas flow rate in the current sampling channel without the need for a buzzer alarm;

[0134] When the calculated radioactivity or radioactivity concentration is higher than the corresponding maximum threshold, the buzzer alarm 401 enters the safety warning mode and emits a corresponding buzzer sound to warn the staff to pay attention to safety and adjust the working state of the production equipment in time.

[0135] This embodiment also provides a multi-channel pipeline aerosol continuous monitoring method, based on the above-mentioned multi-channel pipeline aerosol continuous monitoring system, including the following steps:

[0136] S1. After the whole system is powered on, the vacuum pump 302 of the control module 300 is turned on first, and the system is preheated for 15 to 30 minutes;

[0137] S2. The staff sets the sampling interval time. The data processing module 400 receives the sampling interval time signal and controls the control unit 102 of the sampling module 100. Multiple control units 102 may be opened at the same time to sample aerosols in multiple pipelines at the same time, or multiple control units 102 may be opened one by one in sequence to sample aerosols in multiple pipelines one by one in sequence.

[0138] S3, the vacuum pump 302 operates continuously, and forms an air pressure difference in the sampling head 101 corresponding to the opened control unit 102, so that the aerosol to be measured enters the sampling module 100, and flows through the measuring module 200 and the control module 300 in sequence, and finally exits the system after noise reduction in the muffler 303; each differential pressure gauge 103 measures the air pressure difference between the rear end of each sampling head 101 and the rear end of the measuring module 200 in real time, and the differential pressure gauge 103 with measured data close to 0 corresponds to the open channel of the control unit 102, and the differential pressure gauge 103 with a larger measured data pressure difference corresponds to the closed channel of the control unit 102, and the data processing module 400 uses this data to determine whether the control of the control unit 102 is correct;

[0139] S4. The aerosol to be measured that enters the sampling module 100 flows into the measuring module 200 through the gas channel. The radioactive aerosol particles are deposited on the aerosol particle collecting unit 201. The data processing module 400 provides high and low pressures to the detector unit 202. The first detector 2021 located at the front end of the aerosol particle collecting unit 201 measures the α and β radiation of the deposited radioactive particles and the environmental γ rays. The second detector 2022 located at the rear end of the aerosol particle collecting unit 201 measures the environmental background γ rays. The radiation signals measured by the two detectors are all uploaded to the data processing module 400. After receiving the data, the data processing module 400 processes the data to obtain the α and β radioactivity activities of the radioactive aerosol.

[0140] S5. The aerosol on which radioactive particles have been deposited flows out of the measurement module 200 and enters the control module 300. The flow rate is measured by the flow meter 3011. The regulating valve 3012 at the rear end of the flow meter 3011 can control the flow rate. The gas flow rate data is uploaded to the data processing module 400. The data processing module 400 combines the gas flow rate data with the α and β radioactive activities to calculate the radioactive activity concentration, and displays the radioactive activity concentration and the gas flow rate data on the touch screen 402.

[0141] S6. The data processing module 400 stores the collected radiation data, gas flow data, and processed radioactivity and radioactivity concentration data accordingly. Due to its networking function, it can also be uploaded online. While measuring and processing the radiation information in real time to obtain the radioactivity concentration, the radioactivity concentration and gas flow are compared and analyzed with the alarm threshold. When the threshold is exceeded, the buzzer alarm 401 is immediately activated to sound an alarm, thereby ensuring the overall safety of the staff and the system.

[0142] like Figure 7 As shown, this embodiment also provides a system control device, which includes a processor, a memory, and a computer program stored in the memory and running on the processor.

[0143] The processor includes one or more processing cores. The processor is connected to the memory through a bus. The memory is used to store program instructions. When the processor executes the program instructions in the memory, the above-mentioned multi-channel pipeline aerosol continuous monitoring system and its monitoring method steps are implemented.

[0144] Optionally, the memory can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0145] In addition, the present invention also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the above-mentioned multi-channel pipeline aerosol continuous monitoring system and monitoring method steps are implemented.

[0146] Optionally, the present invention also provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the above-mentioned multi-channel pipeline aerosol continuous monitoring system and monitoring method steps thereof.

[0147] A person of ordinary skill in the art can understand that the process of implementing all or part of the steps of the above-mentioned embodiments can be completed by hardware, or can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the above-mentioned storage medium can be a read-only memory, a disk or an optical disk, etc.

[0148] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multi-channel pipeline aerosol continuous monitoring system, characterized in that: The invention comprises a sampling module (100), a measuring module (200) and a control module (300) which are sequentially connected through a gas channel; and further comprises a data processing module (400); the sampling module (100), the measuring module (200) and the control module (300) are electrically connected to the data processing module (400) through a power line and a data transmission line respectively; wherein: The sampling module (100) is used to sample the gas to be tested from the pipeline; The measuring module (200) is used to measure the radioactivity and concentration of the aerosol of the sampled gas to be tested; The control module (300) is used to control the on-off flow of gas during sampling and measurement, and ultimately control the discharge of gas after measurement; The data processing module (400) is used to set parameters involved in the continuous monitoring process of gas aerosol, process data and display the monitoring data.

2. The multi-channel pipeline aerosol continuous monitoring system according to claim 1, characterized in that: The sampling module (100) comprises a plurality of groups of sampling heads (101), a control unit (102) and a plurality of differential pressure gauges (103) which are connected in sequence; The sampling head (101) can be configured as a plurality of sampling channels for respectively sampling a plurality of pipelines at the same time; the sampling head (101) is an isokinetic sampling module for isokinetically sampling the gas to be tested in the pipeline; The control unit (102) comprises a plurality of on-off elements respectively arranged on a plurality of sampling channels of the sampling head (101), and is used for starting and stopping sampling control of each sampling channel; A plurality of differential pressure gauges (103) are respectively connected between the rear end of the corresponding sampling channel of the sampling head (101) and the rear end of the measuring module (200); the differential pressure gauges (103) are used to upload data to the data processing module (400) to determine whether the start and stop of the control unit (102) is correct.

3. The multi-channel pipeline aerosol continuous monitoring system according to claim 2, characterized in that: The measurement module (200) comprises an aerosol particle collection unit (201) and a detector unit (202); the detector unit (202) comprises a first detector (2021) and a second detector (2022); the aerosol particle collection unit (201) is located between the first detector (2021) and the second detector (2022); The first detector (221) is a PIPS semiconductor detector, located at the front end of the aerosol particle collection unit (201), and used to detect α and β rays and environmental γ rays emitted by the aerosol particle collection unit (201); The second detector (2022) is located at the rear end of the aerosol particle collection unit (201), and detects only the ambient background gamma rays, so as to provide background compensation for the ambient gamma rays; The detector unit (202) transmits the measured radiation data to the data processing module (400) to serve as a basis for calculating the radioactivity.

4. The multi-channel pipeline aerosol continuous monitoring system according to claim 3, characterized in that: The control module (300) comprises a flow control unit (301), an air pump (302), a muffler (303) and an air outlet (304) which are sequentially connected through a gas channel; The flow control unit (301) is used to monitor and adjust the size of the gas flow in the channel, and includes a flow meter (3011) and a regulating valve (3012) arranged in sequence from front to back; wherein: The flow meter (3011) is used to transmit the monitored gas flow data to the data processing module (400) to serve as a basis for calculating the radioactivity concentration; the regulating valve (3012) is used to adjust the gas flow in the current sampling channel; The air extraction pump (302) is used to extract the gas to be detected from each pipeline; The muffler (303) is used to eliminate noise caused by gas flow; The gas outlet (304) is used to discharge the measured gas.

5. The multi-channel pipeline aerosol continuous monitoring system according to claim 4, characterized in that: The data processing module (400) has a networking function, and after receiving, processing and storing the measurement data from the measurement module (200) and the flow meter (3011), it can upload the data to the network and can also receive networked data; The data processing module (400) further comprises a buzzer alarm (401), and after comparing the processed data with the alarm threshold, the data processing module (400) determines whether to turn on the buzzer alarm (401) to give an alarm; The data processing module (400) further comprises a touch display screen (402) for real-time display of α, β radioactivity activities and gas flow rates, and for manually performing settings and data viewing operations on the display interface.

6. The multi-channel pipeline aerosol continuous monitoring system according to claim 5, characterized in that: The calculation formula of the radioactivity is: A=N1-N2 Wherein, A is the radioactivity; N1 is the measurement value of the first detector (2021), N1=∑(α+β+γ1), i.e., the sum of the number of α, β rays and environmental γ rays; N2 is the measurement value of the second detector (2022), N2=γ2, i.e., the number of environmental background γ rays.

7. The multi-channel pipeline aerosol continuous monitoring system according to claim 6, characterized in that: In the calculation process of the radioactivity, the factors of time, detector efficiency and statistical error are introduced, and the calculation formula of the radioactivity is optimized as follows: Wherein, p1 and p2 are detector efficiency factors of the first detector (2021) and the second detector (2022), respectively; w t is the time weight, T is the total number of time periods, a is the detector correction coefficient, and B is the confidence interval.

8. The multi-channel pipeline aerosol continuous monitoring system according to claim 7, characterized in that: The calculation formula of the radioactivity concentration is: C=A / Q Wherein, C is the radioactivity concentration, A is the radioactivity, and Q is the gas flow rate, which is measured by the flow meter (3011).

9. The multi-channel pipeline aerosol continuous monitoring system according to claim 8, characterized in that: In the calculation process of the radioactivity concentration, the factors of time, detector efficiency, flowmeter accuracy, environment and statistical analysis optimization are introduced, and the calculation formula of the radioactivity concentration is optimized as follows: Wherein, d1 is the detector efficiency correction factor; d2 is the flowmeter accuracy correction factor; f1 and f2 are the environmental correction factors corresponding to the radioactivity and flow measurement, respectively; e1 is the radioactivity uncertainty, e2 is the gas flow uncertainty; w t1 、w t2 are the time weights corresponding to radioactive activity and gas flow rate respectively.

10. The multi-channel pipeline aerosol continuous monitoring system according to claim 9, characterized in that: The buzzer alarm (401) includes two working modes, specifically: The alarm thresholds include the minimum threshold and the maximum threshold; among which: The minimum thresholds include the minimum threshold of radioactivity, the minimum threshold of radioactivity concentration, and the minimum threshold of gas flow; The maximum thresholds include the maximum threshold of radioactivity, the maximum threshold of radioactivity concentration, and the maximum threshold of gas flow; The two working modes of the buzzer alarm (401) include: a fault alarm mode when the processed data is lower than the corresponding lowest threshold value, and a safety warning mode when the processed data is higher than the corresponding highest threshold value.

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