Gas concentration monitoring equipment and method and medium

Abstract

The invention discloses gas concentration monitoring equipment, a gas concentration monitoring method and a medium. The working cycle of the gas concentration monitoring equipment comprises a gas permeation stage and a gas monitoring stage; in the gas permeation stage, the controller controls the third electromagnetic valve to be opened, controls the first electromagnetic valve and the second electromagnetic valve to be closed, and adjusts the opening degree of the second flow adjusting valve according to the gas flow; in the gas monitoring stage, the controller controls the first electromagnetic valve and the second electromagnetic valve to be opened, controls the third electromagnetic valve to be closed and adjusts the opening degree of the first flow adjusting valve according to the gas flow. According to the gas concentration monitoring equipment provided by the invention, gas sampling is carried out at a monitoring point through the sampling device, so that an instrument is prevented from directly operating in a high-temperature, high-humidity or high-irradiation environment, the reliability of monitoring data is improved, and long-term stable real-time monitoring on the gas concentration in a special environment is realized.

Description

Technical Field

[0001] The present invention relates to the field of gas concentration measurement, and particularly to a gas concentration monitoring device, method and medium. Background Art

[0002] In some scientific research and production activities, it is necessary to monitor the gas concentration in high-temperature, high-humidity or high-irradiation environments such as around the main steam pipeline, around the pressure vessel or near the safety valve relief port in real time. For example, monitor the concentration of gases such as water vapor and hydrogen in the air in some areas inside the containment of a pressurized water reactor. Existing instruments cannot operate normally in such environments or can only operate normally in such environments for a short time, it is difficult to obtain reliable monitoring data, and it is impossible to achieve long-term stable real-time monitoring of gas concentration. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the defect that existing instruments cannot operate normally in high-temperature, high-humidity or high-irradiation environments or can only operate normally in such environments for a short time, and cannot achieve long-term stable real-time monitoring of gas concentration, and provide a gas concentration monitoring device, method and medium.

[0004] The present invention solves the above technical problem by the following technical solutions:

[0005] The present invention provides a gas concentration monitoring device, the gas concentration monitoring device includes a sampling device and a measuring device, the sampling device includes: an instrument pipeline and a permeation component, the permeation component is arranged at the monitoring point, and the permeation component is connected to the measuring device through the instrument pipeline; the measuring device includes: a flow sensor, a first flow regulating valve, a temperature sensor, a first solenoid valve, a second solenoid valve, a third solenoid valve, a second flow regulating valve, a gas analyzer and a controller, and the working cycle of the gas concentration monitoring device includes a gas permeation stage and a gas monitoring stage;

[0006] One end of the flow sensor is connected to a compressed air source, and the other end is connected to the intake port of the first solenoid valve through the first flow regulating valve;

[0007] The outlet of the first solenoid valve is connected to the intake port of the second solenoid valve through the instrument pipeline;

[0008] The outlet of the second solenoid valve is connected to the intake port of the gas analyzer through the temperature sensor;

[0009] The outlet of the gas analyzer is connected to an exhaust device;

[0010] The outlet of the first flow regulating valve is connected to the outlet of the second solenoid valve through the third solenoid valve and the second flow regulating valve in sequence;

[0011] The controller is electrically connected to the temperature sensor, the flow sensor, the gas analyzer, the first flow regulating valve, the second flow regulating valve, the first solenoid valve, the second solenoid valve, and the third solenoid valve respectively;

[0012] The temperature sensor is used to measure the gas temperature at the inlet of the gas analyzer;

[0013] The flow sensor is used to measure the gas flow at the inlet of the first flow regulating valve;

[0014] The gas analyzer is used to measure the first gas concentration of the target component in the gas flowing into the gas analyzer;

[0015] In the gas permeation stage, the controller is used to control the third solenoid valve to open, control the first solenoid valve and the second solenoid valve to close, and adjust the opening degree of the second flow regulating valve according to the gas flow;

[0016] In the gas monitoring stage, the controller is further used to control the first solenoid valve and the second solenoid valve to open, control the third solenoid valve to close, and adjust the opening degree of the first flow regulating valve according to the gas flow.

[0017] Preferably, a permeation area is provided on the permeation component, and the material of the permeation area is a porous permeation material.

[0018] Preferably, the number of the permeation components is multiple, and the permeation components correspond to the monitoring points one by one.

[0019] Preferably, the gas concentration monitoring device further includes: a pressure reducing valve and a pressure sensor;

[0020] The compressed air source is connected to the flow sensor through the pressure reducing valve and the pressure sensor in sequence;

[0021] The controller is electrically connected to the pressure sensor;

[0022] The pressure sensor is used to measure the gas pressure at the outlet of the pressure reducing valve.

[0023] Preferably, the gas concentration monitoring device further includes a first stop valve and a second stop valve;

[0024] The compressed air source is connected to the pressure reducing valve through the first stop valve;

[0025] The gas analyzer is connected to the exhaust device through the second stop valve;

[0026] During the gas permeation stage and the gas monitoring stage, both the first shut-off valve and the second shut-off valve remain open.

[0027] The present invention also provides a gas concentration monitoring method, which is implemented by the aforementioned gas concentration monitoring device. The gas concentration monitoring method includes:

[0028] Obtain the gas temperature at the inlet of the gas analyzer.

[0029] Obtain the gas flow rate at the inlet of the first flow regulating valve.

[0030] Obtain the first gas concentration of the target component in the gas flowing into the gas analyzer.

[0031] During the gas permeation stage, control the third solenoid valve to open, control the first solenoid valve and the second solenoid valve to close, and adjust the opening degree of the second flow regulating valve according to the gas flow rate.

[0032] During the gas monitoring stage, control the first solenoid valve and the second solenoid valve to open, control the third solenoid valve to close, adjust the opening degree of the first flow regulating valve according to the gas flow rate, and obtain the second gas concentration of the target component at the monitoring point based on the gas temperature, the gas flow rate, and the first gas concentration; the second gas concentration represents the actual concentration of the target component at the monitoring point.

[0033] Preferably, the number of the permeation components is multiple, and the permeation components correspond to the monitoring points one by one. The gas concentration monitoring method further includes:

[0034] Record the duration required for the first gas concentration to reach the maximum value each time, and determine the target permeation component according to the duration.

[0035] Preferably, the step of determining the target permeation component according to the duration specifically includes:

[0036] Determine the pipeline length between the permeation component corresponding to the duration and the gas analyzer according to the duration.

[0037] Determine the target permeation component according to the pipeline length.

[0038] The present invention also provides a gas concentration monitoring device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, the aforementioned gas concentration monitoring method is implemented.

[0039] The present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the foregoing gas concentration monitoring method is implemented.

[0040] Based on the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0041] The positive and progressive effects of the present invention are as follows: The present invention provides a gas concentration monitoring device. The gas concentration monitoring device samples gas at a monitoring point through a sampling device, avoiding the direct operation of the instrument in a high-temperature, high-humidity or high-irradiation environment, improving the reliability of monitoring data, and realizing long-term stable real-time monitoring of gas concentration in a high-temperature, high-humidity or high-irradiation environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a first structural schematic diagram of the gas concentration monitoring device provided in Embodiment 1 of the present invention.

[0043] Figure 2 It is a structural schematic diagram of the permeation component provided in Embodiment 1 of the present invention.

[0044] Figure 3 It is a flowchart of the gas concentration monitoring method provided in Embodiment 2 of the present invention.

[0045] Figure 4 It is a second structural schematic diagram of the gas concentration monitoring device provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The present invention will be further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0047] Embodiment 1

[0048] This embodiment provides a gas concentration monitoring device, as Figure 1 shown. The gas concentration monitoring device includes a sampling device 1 and a measuring device 2. The sampling device 1 includes: an instrument pipeline 11 and a permeation component 12. The permeation component 12 is arranged at the monitoring point, and the permeation component 12 is connected to the measuring device 2 through the instrument pipeline 11. The measuring device 2 includes: a flow sensor 21, a first flow regulating valve 22, a temperature sensor 23, a first electromagnetic valve 24, a second electromagnetic valve 25, a third electromagnetic valve 26, a second flow regulating valve 27, a gas analyzer 28 and a controller 29. The working cycle of the gas concentration monitoring device includes a gas permeation stage and a gas monitoring stage.

[0049] One end of the flow sensor 21 is connected to a compressed air source 7, and the other end is connected to the air inlet of the first electromagnetic valve 24 through the first flow regulating valve 22.

[0050] The air outlet of the first solenoid valve 24 is connected to the air inlet of the second solenoid valve 25 through the instrument pipeline 11.

[0051] The air outlet of the second solenoid valve 25 is connected to the air inlets of the temperature sensor 23 and the gas analyzer 28.

[0052] The air outlet of the gas analyzer 28 is connected to the exhaust device 8.

[0053] The air outlet of the first flow regulating valve 22 is connected to the air outlet of the second solenoid valve 25 through the third solenoid valve 26 and the second flow regulating valve 27 in sequence.

[0054] The controller 29 is electrically connected to the temperature sensor 23, the flow sensor 21, the gas analyzer 28, the first flow regulating valve 22, the second flow regulating valve 27, the first solenoid valve 24, the second solenoid valve 25, and the third solenoid valve 26 respectively.

[0055] The temperature sensor 23 is used to measure the gas temperature at the air inlet of the gas analyzer 28.

[0056] The flow sensor 21 is used to measure the gas flow rate at the air inlet of the first flow regulating valve 22.

[0057] The gas analyzer 28 is used to measure the first gas concentration of the target component in the gas flowing into the gas analyzer 28.

[0058] During the gas permeation stage, the controller 29 is used to control the third solenoid valve 26 to open, control the first solenoid valve 24 and the second solenoid valve 25 to close, and adjust the opening degree of the second flow regulating valve 27 according to the gas flow rate.

[0059] Specifically, at the moment when the working state of the gas concentration monitoring device switches from the gas permeation stage to the gas monitoring stage, due to the change in the gas flow path in the gas concentration monitoring device, the gas flow rate in the gas concentration monitoring device is prone to fluctuate, affecting the accuracy of the gas concentration monitoring result. Therefore, during the gas permeation stage, the controller 29 adjusts the opening degree of the second flow regulating valve 27 according to the gas flow rate measured by the flow sensor 21, so that the gas flow rate in the gas concentration monitoring device remains stable and is consistent with the gas flow rate in the gas monitoring stage, improving the stability of the gas flow rate in the gas monitoring stage. At the same time, at this time, the clean and dry compressed air directly from the compressed air source 7 flows in the passage, which can clean the internal flow path of the gas analyzer 28 and calibrate the reference point of the gas analyzer 28, improving the accuracy of the gas concentration monitoring result. During this period, the opening degree of the first flow regulating valve 22 remains unchanged.

[0060] During the gas monitoring stage, the controller 29 is also used to control the first solenoid valve 24 and the second solenoid valve 25 to open, control the third solenoid valve 26 to close, and adjust the opening degree of the first flow regulating valve 22 according to the gas flow rate.

[0061] Specifically, if the gas flow rate in the gas concentration monitoring device is unstable, it will affect the accuracy of the gas concentration monitoring result. Therefore, during the gas monitoring stage, the controller 29 adjusts the opening degree of the first flow regulating valve 22 according to the gas flow rate measured by the flow sensor 21, so that the gas flow rate in the gas concentration monitoring device remains stable and the accuracy of the gas concentration monitoring result is improved. During this period, the opening degree of the second flow regulating valve 27 remains unchanged.

[0062] Among them, the compressed air source 7 provides clean and dry compressed air for the gas concentration monitoring device. The pressure of the compressed air can be determined according to the actual situation. Generally, compressed air with 6-8 atmospheres can be selected. This embodiment does not limit this.

[0063] This embodiment provides a gas concentration monitoring device. The gas concentration monitoring device samples gas at the monitoring point through the sampling device, avoiding the instrument from directly operating in high-temperature, high-humidity or high-irradiation environments, improving the reliability of the monitoring data, and realizing long-term stable real-time monitoring of the gas concentration in high-temperature, high-humidity or high-irradiation environments.

[0064] In an alternative embodiment, as Figure 2 shown, a permeation area 121 is provided on the permeation component 12, and the material of the permeation area 121 is a porous permeation material.

[0065] During the gas permeation stage, the controller 29 controls the first solenoid valve 24 and the second solenoid valve 25 to close, and there is no gas flow in the loop of the sampling device 1. The concentration of the target component in the gas around the permeation component 12 is higher than the concentration of the target component in the gas in the instrument pipeline 11. Under the action of the concentration difference, due to the permeation effect, the target component will enter the instrument pipeline 11 through the permeation area 121, and a gas mass containing the target component will be formed in the instrument pipeline 11 with a certain length before and after the permeation component 12.

[0066] In an alternative embodiment, as Figure 1 shown, the number of the permeation components 12 is multiple, and the permeation components 12 correspond to the monitoring points one by one.

[0067] Specifically, the permeation component 12 is arranged at the monitoring point. In the gas permeation stage, when the target component exists in the gas in the area where the permeation component 12 is located, the target component will diffuse into the instrument pipeline 11 through the permeation area 121, forming an air mass at each permeation component 12; in the gas monitoring stage, the controller 29 controls the first solenoid valve 24 and the second solenoid valve 25 to open and the third solenoid valve 26 to close. At this time, the sampling device 1 loop is opened, and compressed air flows through the sampling device 1 loop. The air mass containing the target component advances in the instrument pipeline 11 under the action of the compressed gas. When the air mass flows through the gas analyzer 28, the maximum measured value of the concentration of the target component can be obtained. The gas analyzer 28 measures the concentration of the target component in the air mass corresponding to each permeation component 12 in turn.

[0068] In an alternative embodiment, as Figure 1 shown, the gas concentration monitoring device further includes: a pressure reducing valve 3 and a pressure sensor 4. The compressed air source 7 is connected to the flow sensor 21 through the pressure reducing valve 3 and the pressure sensor 4 in sequence. The controller 29 is electrically connected to the pressure sensor 4. The pressure sensor 4 is used to measure the gas pressure at the outlet of the pressure reducing valve 3.

[0069] Specifically, since the air pressure provided by the compressed air source 7 is generally relatively high, if the air provided by the compressed air source 7 is directly used as the gas in the gas concentration monitoring device, the flow sensor 21 and the first flow regulating valve 22 cannot work under the best working conditions, resulting in a decrease in the accuracy of the gas concentration monitoring result. Therefore, the gas pressure in the gas concentration monitoring device is reduced by the pressure reducing valve 3, and specifically how much the gas pressure is reduced can be determined according to the parameters of the flow sensor 21 and the first flow regulating valve 22.

[0070] In an alternative embodiment, as Figure 1 shown, the gas concentration monitoring device further includes a first stop valve 5 and a second stop valve 6. The compressed air source 7 is connected to the pressure reducing valve 3 through the first stop valve 5. The gas analyzer 28 is connected to the exhaust device 8 through the second stop valve 6. In the gas permeation stage and the gas monitoring stage, the first stop valve 5 and the second stop valve 6 are both kept open.

[0071] Embodiment 2

[0072] The present invention provides a gas concentration monitoring method, which is implemented by the gas concentration monitoring device in Embodiment 1, as Figure 3 shown, the gas concentration monitoring method includes the following steps:

[0073] S201. Obtain the gas temperature at the inlet of the gas analyzer, obtain the gas flow rate at the inlet of the first flow regulating valve, and obtain the first gas concentration of the target component in the gas flowing into the gas analyzer.

[0074] S202. During the gas permeation stage, control the third solenoid valve to open, control the first solenoid valve and the second solenoid valve to close, and adjust the opening degree of the second flow regulating valve according to the gas flow rate.

[0075] Specifically, at the moment when the working state of the gas concentration monitoring device switches from the gas permeation stage to the gas monitoring stage, due to the change in the gas flow path in the gas concentration monitoring device, the gas flow rate in the gas concentration monitoring device is likely to fluctuate, affecting the accuracy of the gas concentration monitoring result. Therefore, during the gas permeation stage, adjust the opening degree of the second flow regulating valve according to the gas flow rate, so that the gas flow rate in the gas concentration monitoring device remains stable and is consistent with the gas flow rate in the gas monitoring stage, improving the stability of the gas flow rate in the gas monitoring stage. At the same time, the clean and dry compressed air directly from the compressed air source flows in the path at this time, which can clean the internal flow path of the gas analyzer and calibrate the reference point of the gas analyzer, improving the accuracy of the gas concentration monitoring result. During this period, the opening degree of the first flow regulating valve remains unchanged.

[0076] S203. During the gas monitoring stage, control the first solenoid valve and the second solenoid valve to open, control the third solenoid valve to close, adjust the opening degree of the first flow regulating valve according to the gas flow rate, and obtain the second gas concentration of the target component at the monitoring point according to the gas temperature, gas flow rate, and the first gas concentration.

[0077] Specifically, the second gas concentration represents the actual concentration of the target component at the monitoring point. If the gas flow rate in the gas concentration monitoring device is unstable, it will affect the accuracy of the gas concentration monitoring result. Therefore, during the gas monitoring stage, the controller adjusts the opening degree of the first flow regulating valve according to the gas flow rate measured by the flow sensor, so that the gas flow rate in the gas concentration monitoring device remains stable, improving the accuracy of the gas concentration monitoring result. During this period, the opening degree of the second flow regulating valve remains unchanged.

[0078] The present invention provides a gas concentration monitoring method. The gas concentration monitoring device samples gas at the monitoring point through a sampling device, avoiding the direct operation of the instrument in high-temperature, high-humidity, or high-irradiation environments, improving the reliability of the monitoring data, and realizing long-term stable real-time monitoring of the gas concentration in high-temperature, high-humidity, or high-irradiation environments.

[0079] In an optional embodiment, the number of permeation components is multiple, and the permeation components correspond to the monitoring points one by one. The gas concentration monitoring method further includes the steps of:

[0080] S204. Record the duration required for the first gas concentration to reach the maximum value each time, and determine the target permeation component according to the duration.

[0081] Specifically, the permeation component is arranged at the monitoring point. During the gas permeation stage, when the target component exists in the gas in the area where the permeation component is located, the target component will diffuse into the instrument pipeline through the permeation area, forming an air mass at each permeation component; during the gas monitoring stage, the controller controls the first solenoid valve and the second solenoid valve to open and the third solenoid valve to close. At this time, the sampling device loop is opened, and compressed air flows through the sampling device loop. The air mass containing the target component advances in the instrument pipeline under the action of the compressed gas. When the air mass flows through the gas analyzer, a measured value of the concentration of the target component can be obtained. The gas analyzer measures the concentration of the target component in the air mass corresponding to each permeation component in turn.

[0082] In an alternative embodiment, step S204 specifically includes:

[0083] S2041. Determine the pipeline length between the permeation component and the gas analyzer corresponding to the duration.

[0084] S2042. Determine the target permeation component according to the pipeline length.

[0085] Specifically, if the gas analyzer 28 measures a total of n maximum values in a certain working cycle, and the durations required to appear the maximum values are t1, t2,..., t n , and the corresponding maximum values are M1, M2,..., M n , and the pipeline lengths between the permeation components corresponding to each air mass with the maximum value and the gas analyzer 28 are denoted as L1, L2,..., L n , then the pipeline length between the corresponding permeation component and the gas analyzer can be determined by the following formula:

[0086]

[0087] where, T0 represents the ambient reference temperature, T1 represents the gas temperature measured by the temperature sensor, L0 represents the reference length of the end of the instrument pipeline, which is determined according to the parameters of the instrument pipeline; a is a constant determined according to the parameters of the instrument pipeline, and Q is the gas flow measured by the flow sensor.

[0088] In an alternative embodiment, the gas concentration monitoring method further includes the step of:

[0089] S205. Obtain the second gas concentration of the target component at the corresponding monitoring point according to the first gas concentration. Specifically, the second gas concentration characterizes the actual concentration of the target component at the monitoring point. If the second gas concentrations of the target components at the monitoring points where the permeation components corresponding to the maximum values of each first gas concentration are located are denoted as R1, R2,..., R n , then the second gas concentration of the target component at the corresponding monitoring point can be obtained according to the first gas concentration by the following formula:

[0090]

[0091] Among them, b, c and d are constants determined by the relevant parameters of the instrument pipeline and permeation components, and e is a natural constant.

[0092] Based on the calculated L k By matching the pipe length of each permeation component to the gas analyzer, the permeation component corresponding to the current air mass can be obtained, R k That is, the concentration value of the target component around this permeation component.

[0093] In an optional embodiment, the gas concentration monitoring device further includes: a pressure reducing valve and a pressure sensor, the compressed air source is connected to the flow sensor through the pressure reducing valve and the pressure sensor in sequence, the controller is electrically connected to the pressure sensor, and the gas concentration monitoring method further includes the steps of:

[0094] S206: Obtain the gas pressure at the gas outlet of the pressure reducing valve.

[0095] S207. Regulate the opening of the pressure reducing valve according to the gas pressure.

[0096] Specifically, since the air pressure provided by compressed air is generally high, if the air provided by the compressed air source is directly used as the gas in the gas concentration monitoring device, the flow sensor and the first flow regulating valve cannot operate under the optimal working conditions, resulting in a decrease in the accuracy of the gas concentration monitoring results. Therefore, the gas pressure in the gas concentration monitoring device is reduced by a pressure reducing valve. The specific amount to which the gas pressure is reduced can be determined based on the parameters of the flow sensor and the first flow regulating valve.

[0097] In an optional embodiment, the gas concentration monitoring device further includes a first stop valve and a second stop valve, the compressed air source is connected to the pressure reducing valve via the first stop valve, and the gas analyzer is connected to the exhaust device via the second stop valve. The gas concentration monitoring method further includes the steps of:

[0098] S208. During the gas permeation stage and the gas monitoring stage, the first stop valve and the second stop valve are controlled to be open.

[0099] Specifically, after the first stop valve and the second stop valve are opened, the passage between the first stop valve and the second stop valve is connected, and the compressed air provided by the compressed air source to the gas concentration detection device flows into the gas concentration monitoring device. In the gas monitoring stage and the gas permeation stage, the first stop valve and the second stop valve are both kept open.

[0100] Example 3

[0101] Figure 4This is a schematic structural diagram of a gas concentration monitoring device provided in Embodiment 3 of the present invention. It includes a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the computer program, it implements the gas concentration monitoring method of the foregoing Embodiment 2. Figure 4 The gas concentration monitoring device 30 shown is merely an example and should not impose any limitation on the functions and scope of use of the embodiments of the present invention.

[0102] The gas concentration monitoring device 30 may be presented in the form of a general-purpose computing device. For example, it may be a server device. The components of the gas concentration monitoring device 30 may include, but are not limited to: the foregoing at least one processor 31, the foregoing at least one memory 32, and a bus 33 connecting different system components (including the memory 32 and the processor 31).

[0103] The bus 33 includes a data bus, an address bus, and a control bus.

[0104] The memory 32 may include volatile memory, such as a random access memory (RAM) 321 and / or a cache memory 322, and may further include a read-only memory (ROM) 323.

[0105] The memory 32 may further include a program / utilities 325 having a set (at least one) of program modules 324. Such program modules 324 include, but are not limited to: an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include the implementation of a network environment.

[0106] The processor 31 executes various functional applications and data processing by running the computer program stored in the memory 32, such as the gas concentration monitoring method of Embodiment 2 of the present invention.

[0107] The gas concentration monitoring device 30 may also communicate with one or more external devices 34 (such as a keyboard, a pointing device, etc.). Such communication may be carried out through an input / output (I / O) interface 35. And the gas concentration monitoring device 30 may also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN), and / or a public network, such as the Internet) through a network adapter 36. As shown in the figure, the network adapter 36 communicates with other modules of the gas concentration monitoring device 30 through the bus 33. It should be understood that although not shown in the figure, other hardware and / or software modules may be used in combination with the device 30 for model generation, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.

[0108] It should be noted that although several units / modules or sub-units / modules of the electronic device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present invention, the features and functions of two or more units / modules described above can be embodied in one unit / modules. Conversely, the features and functions of one unit / modules described above can be further divided and embodied by multiple units / modules.

[0109] Embodiment 4

[0110] The present invention also provides a computer-readable medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the gas concentration monitoring method of the foregoing Embodiment 2.

[0111] Among them, the readable storage medium can more specifically include but is not limited to: portable disk, hard disk, random access memory, read-only memory, erasable programmable read-only memory, optical storage device, magnetic storage device or any suitable combination of the above.

[0112] In a possible implementation manner, the present invention can also be implemented in the form of a program product, which includes program code. When the program product runs on a terminal device, the program code is used to make the terminal device execute the gas concentration monitoring method of Embodiment 2.

[0113] Among them, the program code for executing the present invention can be written in any combination of one or more programming languages, and the program code can be completely executed on the user device, partially executed on the user device, executed as an independent software package, partially executed on the user device and partially executed on a remote device, or completely executed on a remote device.

[0114] Although the specific implementation manners of the present invention are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A gas concentration monitoring device, characterized in that, The gas concentration monitoring device includes a sampling device and a measuring device. The sampling device includes: an instrument pipeline and a permeation component. The permeation component is arranged at the monitoring point, and the permeation component is connected to the measuring device through the instrument pipeline. The measuring device includes: a flow sensor, a first flow regulating valve, a temperature sensor, a first solenoid valve, a second solenoid valve, a third solenoid valve, a second flow regulating valve, a gas analyzer, and a controller. The working cycle of the gas concentration monitoring device includes a gas permeation stage and a gas monitoring stage. One end of the flow sensor is connected to a compressed air source, and the other end is connected to the inlet of the first solenoid valve through the first flow regulating valve. The outlet of the first solenoid valve is connected to the inlet of the second solenoid valve through the instrument pipeline. The outlet of the second solenoid valve is connected to the inlet of the gas analyzer through the temperature sensor. The outlet of the gas analyzer is connected to an exhaust device. The outlet of the first flow regulating valve is sequentially connected to the outlet of the second solenoid valve through the third solenoid valve and the second flow regulating valve. The controller is electrically connected to the temperature sensor, the flow sensor, the gas analyzer, the first flow regulating valve, the second flow regulating valve, the first solenoid valve, the second solenoid valve, and the third solenoid valve respectively. The temperature sensor is used to measure the gas temperature at the inlet of the gas analyzer. The flow sensor is used to measure the gas flow at the inlet of the first flow regulating valve. The gas analyzer is used to measure the first gas concentration of the target component in the gas flowing into the gas analyzer. In the gas permeation stage, the controller is used to control the third solenoid valve to open, control the first solenoid valve and the second solenoid valve to close, and adjust the opening degree of the second flow regulating valve according to the gas flow. In the gas monitoring stage, the controller is further used to control the first solenoid valve and the second solenoid valve to open, control the third solenoid valve to close, and adjust the opening degree of the first flow regulating valve according to the gas flow.

2. The gas concentration monitoring device according to claim 1, characterized in that, A permeation area is arranged on the permeation component, and the material of the permeation area is a porous permeation material.

3. The gas concentration monitoring device according to claim 1, characterized in that, The number of the permeation components is multiple, and the permeation components correspond to the monitoring points one by one.

4. The gas concentration monitoring device according to claim 1, characterized in that, The gas concentration monitoring device further includes: a pressure reducing valve and a pressure sensor. The compressed air source is sequentially connected to the flow sensor through the pressure reducing valve and the pressure sensor. The controller is electrically connected to the pressure sensor. The pressure sensor is used to measure the gas pressure at the outlet of the pressure reducing valve.

5. The gas concentration monitoring device according to claim 4, characterized in that, The gas concentration monitoring device further includes a first stop valve and a second stop valve. The compressed air source is connected to the pressure reducing valve through the first stop valve. The gas analyzer is connected to the exhaust device through the second stop valve. In the gas permeation stage and the gas monitoring stage, the first stop valve and the second stop valve are both kept in an open state.

6. A gas concentration monitoring method, characterized in that, The gas concentration monitoring method is implemented by the gas concentration monitoring device described in any one of claims 1-5. The gas concentration monitoring method includes: Obtaining the gas temperature at the inlet of the gas analyzer; Obtaining the gas flow rate at the inlet of the first flow regulating valve; Obtaining the first gas concentration of the target component in the gas flowing into the gas analyzer; In the gas permeation stage, controlling the third solenoid valve to open, controlling the first solenoid valve and the second solenoid valve to close, and adjusting the opening degree of the second flow regulating valve according to the gas flow rate; In the gas monitoring stage, controlling the first solenoid valve and the second solenoid valve to open, controlling the third solenoid valve to close, adjusting the opening degree of the first flow regulating valve according to the gas flow rate, and obtaining the second gas concentration of the target component at the monitoring point based on the gas temperature, the gas flow rate, and the first gas concentration; the second gas concentration represents the actual concentration of the target component at the monitoring point.

7. The gas concentration monitoring method according to claim 6, characterized in that, The number of the permeation components is multiple, and the permeation components correspond to the monitoring points one by one. The gas concentration monitoring method further includes: Recording the duration required for the first gas concentration to reach the maximum value each time, and determining the target permeation component according to the duration.

8. The gas concentration monitoring method according to claim 7, characterized in that, The step of determining the target permeation component according to the duration specifically includes: Determining the pipe length between the permeation component corresponding to the duration and the gas analyzer according to the duration; Determining the target permeation component according to the pipe length.

9. A gas concentration monitoring device, comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, the gas concentration monitoring method described in any one of claims 6-8 is implemented.

10. A computer-readable storage medium, on which a computer program is stored, characterized in that, When the computer program is executed by the processor, the gas concentration monitoring method described in any one of claims 6-8 is implemented.

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