Gas state monitoring sensor calibration device

Abstract

The utility model discloses a gas state monitoring sensor calibration device, which relates to the technical field of sensor calibration and comprises a calibrator, a standard micro-water sensor, a standard pressure sensor, a gas circuit adjusting system, a humidity calibration module and a pressure calibration module. The calibrator is provided with a sealing cavity, a first port and a second port, wherein the first port and the second port are communicated with the sealing cavity. According to the technical scheme of the utility model, the humidity calibration module and the pressure calibration module are adopted, so that the dual calibration function of gas humidity and pressure parameters can be realized, the problem of single function of the existing calibration device is solved, multi-parameter integrated calibration is realized, the calibration efficiency is improved, and the application range is widened; by adopting the modular design and switching the four pipelines through the on-off control assembly, a user can select different humidity calibration modules or pressure calibration modules according to needs, the operation is convenient, and the automation level and the operation consistency of the system are improved.

Description

Technical Field

[0001] This utility model relates to the field of sensor calibration technology, and in particular to a gas state monitoring sensor calibration device. Background Technology

[0002] SF6 (Sulfur Hexafluoride) gas is an excellent insulating and arc-quenching medium, characterized by its non-toxicity, non-flammability, high insulation strength, and arc-quenching ability far superior to general dielectrics, making it widely used in high-voltage electrical equipment. However, during the operation of SF6 power transmission and transformation equipment, gas leakage and increased gas humidity are unavoidable problems, directly affecting the reliability and safety of the equipment. Therefore, to ensure the safe and stable operation of SF6 equipment, it is necessary to monitor the internal gas state online.

[0003] Currently, several domestic manufacturers have developed online monitoring devices for SF6 gas status, primarily based on parameters such as temperature, pressure, and humidity. However, due to the lack of relevant national standards and authoritative testing institutions to evaluate the measurement accuracy of these devices, the performance of products from different manufacturers varies significantly, making it difficult to guarantee the accuracy and consistency of measurement results. Therefore, there is an urgent need for a professional device capable of calibrating online SF6 gas monitoring devices to ensure the reliability of their measurement data. However, existing calibration devices have limited functionality and cannot meet the needs of multi-parameter calibration. Utility Model Content

[0004] The main purpose of this invention is to propose a gas state monitoring sensor calibration device, which aims to solve the problem that existing calibration devices have limited functionality and cannot meet the requirements of multi-parameter calibration.

[0005] To achieve the above objectives, this utility model proposes a gas state monitoring sensor calibration device, which includes:

[0006] A calibrator having a sealed cavity for accommodating a sensor to be calibrated and a first port and a second port respectively communicating with the sealed cavity;

[0007] A standard micro-moisture sensor is connected to the calibrator so that the detection end of the standard micro-moisture sensor extends into the sealed cavity to detect the humidity of the gas inside the sealed cavity;

[0008] A standard pressure sensor is connected to the calibrator so that the detection end of the standard pressure sensor extends into the sealed cavity to detect the gas pressure inside the sealed cavity;

[0009] A gas path regulating system, the gas path regulating system including a return path and an on / off control component, the inlet of the return path being connected to the outlet of the on / off control component, and the outlet of the return path being connected to the second port;

[0010] A humidity calibration module, comprising a drying pipeline and a humidifying pipeline, wherein the two ends of the drying pipeline are respectively connected to the first port and the inlet of the on / off control component, and the two ends of the humidifying pipeline are respectively connected to the first port and the inlet of the on / off control component;

[0011] The pressure calibration module includes a pressure boosting pipeline and a pressure relief pipeline. The two ends of the pressure boosting pipeline are respectively connected to the first port and the inlet of the on / off control component, and the two ends of the pressure relief pipeline are respectively connected to the second port and the external environment.

[0012] The on / off control component can connect the drying pipeline and the return path, or connect the humidification pipeline and the return path, or connect the pressurization pipeline and the return path, or connect the pressure relief pipeline to the external environment.

[0013] In one embodiment, the return path includes a return pipeline and a first fluid distributor. The first fluid distributor has an outlet end and three first inlet ends. The inlet end of the return pipeline is detachably connected to the outlet end, and the three first inlet ends are detachably connected to the outlet end of the drying pipeline, the outlet end of the humidifying pipeline, and the outlet end of the pressurizing pipeline, respectively, so that the drying pipeline, the humidifying pipeline, and the pressurizing pipeline can all be connected to the return pipeline through the first fluid distributor.

[0014] The calibrator includes a base, a second fluid distributor, and a third fluid distributor. The base has a sealed cavity and a first interface and a second interface respectively communicating with the sealed cavity. The second fluid distributor has a first port and a second access end. The second access end is detachably connected to the first interface. There are three first ports, which are detachably connected to the inlet end of the drying pipeline, the inlet end of the humidification pipeline, and the inlet end of the pressurization pipeline, respectively, so that the drying pipeline, the humidification pipeline, and the pressurization pipeline can all communicate with the base through the second fluid distributor.

[0015] The third fluid distributor is provided with a second port and a third access end. The third access end is detachably connected to the second interface. There are two second ports, which are detachably connected to the outlet end of the return pipeline and the inlet end of the pressure relief pipeline, respectively, so that both the return pipeline and the pressure relief pipeline can be connected to the base through the third fluid distributor.

[0016] In one embodiment, the on / off control component includes a human-machine interface unit, a control unit, and a valve assembly. The valve assembly includes a first valve, a second valve, a third valve, and a fourth valve. The human-machine interface unit, the first valve, the second valve, the third valve, and the fourth valve are all electrically connected to the control unit. The first valve is disposed on the drying pipeline and is used to connect the drying pipeline and the return path. The second valve is disposed on the humidification pipeline and is used to connect the humidification pipeline and the return path. The third valve is disposed on the pressurization pipeline and is used to connect the pressurization pipeline and the return path. The fourth valve is disposed on the pressure relief pipeline, and the outlet of the fourth valve is connected to the external environment, used to connect the pressure relief pipeline to the external environment.

[0017] In one embodiment, the return pipeline includes a pipeline body, a sealing cylinder, and a pressurizing component. The sealing cylinder has a accommodating cavity for accommodating the pressurizing component. The inlet end of the sealing cylinder is detachably connected to the outlet end, and the outlet end of the sealing cylinder is detachably connected to the inlet end of the pipeline body, so that the first fluid distributor can communicate with the pipeline body through the sealing cylinder. The outlet end of the pipeline body is detachably connected to the second port, so that the pipeline body can communicate with the base through the third fluid distributor. The pressurizing component is electrically connected to the control unit and is used to increase the gas pressure.

[0018] In one embodiment, a dryer is provided on the drying pipeline. The inlet end of the dryer is detachably connected to the first port, and the outlet end of the dryer is detachably connected to the inlet end of the first valve, so that both ends of the dryer can be connected to the second fluid distributor and the first valve, respectively. The dryer is used to dry gas.

[0019] In one embodiment, the dryer includes a drying tube and a desiccant. The drying tube is provided with a receiving cavity and a first connector and a second connector communicating with the receiving cavity. The receiving cavity is used to receive the desiccant. The first connector is detachably connected to the first port, and the second connector is detachably connected to the inlet end of the first valve, so that both ends of the drying tube can communicate with the second fluid distributor and the first valve, respectively.

[0020] In one embodiment, a humidity generator is provided on the humidification pipeline. The inlet end of the humidity generator is detachably connected to the first port, and the outlet end of the humidity generator is detachably connected to the inlet end of the second valve, so that both ends of the humidity generator can be connected to the second fluid distributor and the second valve respectively. The humidity generator is used to adjust the humidity of the gas.

[0021] In one embodiment, the base includes a base body, a cover plate, and a heating device. The base body is provided with the sealing cavity and a first interface, a second interface, a first threaded hole, a second threaded hole, and a third threaded hole respectively communicating with the sealing cavity. The top of the sealing cavity forms an opening for the sensor to be calibrated to enter and exit. The opening is covered by the cover plate. The standard micro-water sensor is threadedly engaged with the first threaded hole so that the detection end of the standard micro-water sensor extends into the sealing cavity. The standard pressure sensor is threadedly engaged with the second threaded hole so that the detection end of the standard pressure sensor extends into the sealing cavity. The heating device is threadedly engaged with the third threaded hole so that the heating device can heat the gas.

[0022] In one embodiment, the calibrator further includes a seal, a first groove is provided at one end of the seat body facing the cover plate, and a second groove is provided on one side of the cover plate facing the seat body. The seat body is connected to the cover plate so that the first groove and the second groove communicate to form a sealing groove for receiving at least a portion of the structure of the seal.

[0023] In one embodiment, the diameter of the seal is larger than the diameters of the first groove and the second groove;

[0024] And / or,

[0025] The cover plate includes a cover body and a first terminal block. The terminal block is connected to the cover body. The cover body has a second groove on the side facing the terminal block, and the side of the cover body away from the terminal block is connected to the first terminal block. The on / off control component is electrically connected to the sensor to be calibrated through the first terminal block.

[0026] In this embodiment of the invention, the sealed cavity of the calibrator is used to accommodate the sensor to be calibrated and its detection gas, and is connected to the external gas path through the first port and the second port. While ensuring gas flow, it effectively prevents external interference and ensures the controllability and purity of the gas environment during the calibration process. The standard micro-moisture sensor and the standard pressure sensor are both calibrated sensors with standard sensor functions and performance. The detection ends of the standard micro-moisture sensor and the standard pressure sensor extend into the sealed cavity, which can accurately detect the humidity and pressure changes of the gas in the sealed cavity in real time, providing reference data for comparison with the measurement results of the gas humidity and pressure detected by the sensor to be calibrated. It also helps to maintain the stability of the gas environment in the cavity, thereby improving the accuracy and repeatability of the calibration data. By setting a humidity calibration module and a pressure calibration module, the calibration of gas humidity and pressure parameters can be realized separately, solving the problem of the single function of the existing calibration device and realizing multi-parameter integrated calibration. In this embodiment, the gas state monitoring sensor calibration device includes four inlet pipes: a drying pipe, a humidifying pipe, a pressurizing pipe, and a depressurizing pipe. The gas path regulation system includes a return path and an on / off control component. The return path returns gas from the four pipes to the calibrator, forming a closed-loop cycle to maintain a stable gas environment. The on / off control component is the core control component of the entire gas path regulation system. It allows switching between two functions by selecting the required module. The on / off control component can switch the four pipes on and off, thus switching the gas path and completing either humidity calibration or pressure calibration. When calibrating the sensor for humidity, the pressurizing and depressurizing pipes can be disconnected via the on / off control component. The drying pipe reduces gas humidity, and the humidifying pipe increases it. The on / off control component can switch the drying or humidifying pipes on or off, selectively introducing gas with a set humidity into the sealed cavity to complete humidity calibration. When performing pressure calibration on the sensor to be calibrated, the drying and humidifying lines can be disconnected by the on / off control component, the pressurization line can be used to increase the gas pressure, and the pressure relief line can be used to release the gas pressure. With the on / off control component, the conduction or disconnection of the pressurization line or the pressure relief line can be switched to achieve precise control of the gas pressure in the sealed cavity, thereby completing the pressure calibration.This utility model embodiment, by employing a humidity calibration module and a pressure calibration module, enables dual calibration of gas humidity and pressure parameters, solving the problem of single-function existing calibration devices. It achieves integrated multi-parameter calibration, improving calibration efficiency and applicability. Through modular design and switching of four pipelines via an on / off control component, users can select different humidity or pressure calibration modules as needed, facilitating operation and avoiding errors caused by traditional manual adjustments. This enhances the system's automation level and operational consistency. The system structure is clear, facilitating future maintenance and expansion. Furthermore, this gas state monitoring sensor calibration device is not only suitable for calibrating SF6 gas online monitoring devices but can also be widely applied to other applications. This device is suitable for calibrating humidity and pressure sensors in other gaseous media, offering excellent versatility and adaptability. The calibrator, gas path conditioning system, temperature calibration module, and pressure calibration module can all be connected via gas tubing, eliminating the need for a complex integrated structure. This reduces the overall system complexity and facilitates on-site installation and subsequent maintenance. Users can select to enable or replace specific functional modules according to their actual needs, significantly improving the device's flexibility and scalability. Furthermore, each component can be stored or carried separately and can be folded up when not in use, effectively reducing storage and transportation space. The modular design also helps to quickly build a complete calibration system in limited spaces, making it suitable for various application scenarios such as laboratories and substations. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of the gas state monitoring sensor calibration device of this utility model;

[0029] Figure 2 This is a schematic diagram of the structure of an embodiment of the base of the gas state monitoring sensor calibration device of this utility model;

[0030] Figure 3 This is a schematic diagram of the structure of one embodiment of the base body of the gas state monitoring sensor calibration device of this utility model;

[0031] Figure 4 for Figure 1 A schematic diagram of the AA section.

[0032] Explanation of icon numbers:

[0033] 100. Gas State Monitoring Sensor Calibration Device; 1. Calibrator; 11. Base; 111. Base Body; 1111. Sealing Cavity; 11111. Opening; 1112. First Threaded Hole; 1113. Second Threaded Hole; 1114. Third Threaded Hole; 1115. First Groove; 1116. First Interface; 1117. Second Interface; 1118. Fifth Threaded Hole; 112. Cover Plate; 1121. Cover Body; 11211. Through Hole; 11212. Fourth Threaded Hole; 12. Second Fluid Distributor; 121. First Port; 122. Second Access Terminal; 13. Third Fluid Distributor; 131. Second Port; 132. Third Access Terminal; 2. Standard Micro Moisture Sensor; 3. Standard Pressure Sensor; 4. Gas Path Regulation System; 41. Return Path; 411. Return Piping; 4111, Piping body; 4112, Sealing cylinder; 41121, Receiving cavity; 4113, Pressurizing component; 412, First fluid distributor; 4121, Outlet end; 4122, First inlet end; 42, On / off control assembly; 421, Human-machine interface unit; 422, Control unit; 423, Valve assembly; 4231, First valve; 4232, Second valve; 4233, Third valve; 4234, Fourth valve; 5, Humidity calibration module; 51, Drying piping; 511, Dryer; 5111, Drying tube; 51111, Receiving cavity; 51112, First connector; 51113, Second connector; 5112, Desiccant; 52, Humidification piping; 521, Humidity generator; 6, Pressure calibration module; 61, Pressurizing piping; 62, Pressure relief piping.

[0034] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, and back), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] SF6 gas is an excellent insulating and arc-quenching medium, characterized by its non-toxicity, non-flammability, high insulation strength, and arc-quenching ability far superior to general dielectrics, making it widely used in high-voltage electrical equipment. However, during the operation of SF6 power transmission and transformation equipment, gas leakage and increased gas humidity are unavoidable problems, which directly affect the reliability and safety of the equipment. Therefore, to ensure the safe and stable operation of SF6 equipment, it is necessary to monitor the internal gas state online.

[0039] Currently, several domestic manufacturers have developed online monitoring devices for SF6 gas status, primarily based on parameters such as temperature, pressure, and humidity. However, due to the lack of relevant national standards and authoritative testing institutions to evaluate the measurement accuracy of these devices, the performance of products from different manufacturers varies significantly, making it difficult to guarantee the accuracy and consistency of measurement results. Therefore, there is an urgent need for a professional device capable of calibrating online SF6 gas monitoring devices to ensure the reliability of their measurement data. However, existing calibration devices have limited functionality and cannot meet the needs of multi-parameter calibration.

[0040] Upon careful examination, the applicant discovered that Chinese utility model patent CN202120873241.2 discloses a gas temperature and humidity environment generating device, including a calibration cylinder with a calibration chamber. The calibration cylinder has a first insertion hole and at least one second insertion hole, and is equipped with a heating structure to maintain a constant temperature within the calibration chamber. The device also includes a gas humidity generating section connected to an air inlet, comprising a dry gas pipeline and a steam generating pipeline connected in parallel, with a humidity generator installed on the steam generating pipeline. During use, a standard sensor and a sensor to be calibrated are inserted into the calibration cylinder, with the test end extending into the calibration chamber. By switching between the dry gas pipeline and the steam generating pipeline, gas with constant humidity is input into the calibration chamber, while the heating structure maintains a constant chamber temperature, thereby achieving constant temperature and humidity calibration of the sensor.

[0041] Although the aforementioned patent can meet the needs of humidity calibration to a certain extent, it still has the following shortcomings: First, it can only achieve the function of humidity calibration and cannot calibrate pressure parameters; second, the switching between the drying gas pipeline and the steam generation pipeline relies on a manual regulating valve to control the flow, which has low control accuracy and affects the stability and accuracy of humidity regulation; third, the calibration cylinder has an annular cavity and multiple spiral ribs inside, which makes the structure relatively complex and not conducive to processing, manufacturing and maintenance.

[0042] The main purpose of this invention is to propose a gas state monitoring sensor calibration device to solve the problem that existing calibration devices have limited functionality and cannot meet the requirements for multi-parameter calibration.

[0043] Please see Figure 1In one embodiment of this utility model, the gas state monitoring sensor calibration device 100 includes a calibrator 1, a standard micro-moisture sensor 2, a standard pressure sensor 3, a gas path adjustment system 4, a humidity calibration module 5, and a pressure calibration module 6. The calibrator 1 is provided with a sealed cavity 1111 for accommodating the sensor to be calibrated and a first port 121 and a second port 131 respectively communicating with the sealed cavity 1111. The standard micro-moisture sensor 2 is connected to the calibrator 1 so that the detection end of the standard micro-moisture sensor 2 extends into the sealed cavity 1111 to detect the gas humidity in the sealed cavity 1111. The standard pressure sensor 3 is connected to the calibrator 1 so that the detection end of the standard pressure sensor 3 extends into the sealed cavity 1111 to detect the gas pressure in the sealed cavity 1111. The gas path adjustment system 4 includes a return passage 41 and an on / off control component 42. The inlet of the return passage 41 is connected to the on / off control component 42. The outlet of the on / off control component 42 is connected, and the outlet of the return path 41 is connected to the second port 131; the humidity calibration module 5 includes a drying pipe 51 and a humidifying pipe 52. The two ends of the drying pipe 51 are connected to the first port 121 and the inlet of the on / off control component 42, respectively. The two ends of the humidifying pipe 52 are connected to the first port 121 and the inlet of the on / off control component 42, respectively. The pressure calibration module 6 includes a pressurizing pipe 61 and a depressurizing pipe 62. The two ends of the pressurizing pipe 61 are connected to the first port 121 and the inlet of the on / off control component 42, respectively. The two ends of the depressurizing pipe 62 are connected to the second port 131 and the external environment, respectively. The on / off control component 42 can connect the drying pipe 51 and the return path 41, or connect the humidifying pipe 52 and the return path 41, or connect the pressurizing pipe 61 and the return path 41, or connect the depressurizing pipe 62 to the external environment.

[0044] In this embodiment of the invention, the sealed cavity 1111 of the calibrator 1 is used to accommodate the sensor to be calibrated and its detection gas, and is connected to the external gas path through the first port 121 and the second port 131. While ensuring gas flow, it effectively prevents external interference and ensures the controllability and purity of the gas environment during the calibration process. The standard micro-water sensor 2 and the standard pressure sensor 3 are both calibrated sensors with standard sensor functions and performance. The detection ends of the standard micro-water sensor 2 and the standard pressure sensor 3 extend into the sealed cavity 1111, which can accurately detect the humidity and pressure changes of the gas in the sealed cavity 1111 in real time, providing reference data for comparison with the measurement results of the gas humidity and pressure detected by the sensor to be calibrated. It also helps to maintain the stability of the gas environment in the cavity, thereby improving the accuracy and repeatability of the calibration data. By setting the humidity calibration module 5 and the pressure calibration module 6, the calibration of gas humidity and pressure parameters can be realized respectively, solving the problem of the single function of the existing calibration device and realizing multi-parameter integrated calibration. In this embodiment, the gas state monitoring sensor calibration device 100 has four inlet passages: a drying pipe 51, a humidifying pipe 52, a pressurizing pipe 61, and a depressurizing pipe 62. The gas path regulation system 4 includes a return passage 41 and an on / off control component 42. The return passage 41 can return gas from the four pipes to the calibrator 1, forming a closed loop to maintain a stable gas environment. The on / off control component 42 is the core control component of the entire gas path regulation system 4. It can switch between two functions by selecting the required module. The on / off control component 42 can switch the conduction and closure of the four pipes to realize gas path switching, thereby completing gas humidity calibration or pressure calibration. When calibrating the sensor under test for humidity, the pressure boosting line 61 and the pressure relief line 62 can be disconnected via the on / off control component 42. The drying line 51 is used to reduce gas humidity, and the humidifying line 52 is used to increase gas humidity. The on / off control component 42 can switch the flow of either the drying line 51 or the humidifying line 52, allowing selective input of gas with a set humidity into the sealed cavity 1111, thus completing humidity calibration. When calibrating the sensor under test for pressure, the drying line 51 and the humidifying line 52 can be disconnected via the on / off control component 42. The pressure boosting line 61 increases gas pressure, and the pressure relief line 62 releases gas pressure. The on / off control component 42 can switch the flow of either the pressure boosting line 61 or the pressure relief line 62, achieving precise control of the gas pressure within the sealed cavity 1111, thus completing pressure calibration.

[0045] This utility model's technical solution, by employing a humidity calibration module 5 and a pressure calibration module 6, achieves dual calibration of gas humidity and pressure parameters, solving the problem of single-function existing calibration devices. It realizes integrated multi-parameter calibration, improving calibration efficiency and applicability. Through modular design and switching four pipelines via the on / off control component 42, users can select different humidity calibration modules 5 or pressure calibration modules 6 as needed, facilitating operation and avoiding errors caused by traditional manual adjustment. This enhances the system's automation level and operational consistency. The system structure is clear, facilitating future maintenance and expansion. Furthermore, this gas state monitoring sensor calibration device 100 is not only suitable for calibrating SF6 gas online monitoring devices, but also... It can be widely applied to the calibration of humidity and pressure sensors in other gaseous media, and has good versatility and adaptability. The calibrator 1, gas path conditioning system 4, temperature calibration module and pressure calibration module 6 can all be connected through gas tubes, without the need for a complex integrated structure. This reduces the complexity of the overall system and facilitates on-site installation and subsequent maintenance. Users can choose to enable or replace specific functional modules according to actual needs, which significantly improves the flexibility and scalability of the device. Moreover, each part of the structure can be stored or carried separately and can be stored separately when not in use, effectively reducing storage and transportation space. At the same time, the modular design also helps to quickly build a complete calibration system in a limited space, and is suitable for various application scenarios such as laboratories and substations.

[0046] Please see Figure 1The return path 41 includes a return pipe 411 and a first fluid distributor 412. The first fluid distributor 412 has an outlet end 4121 and three first inlet ends 4122. The inlet end of the return pipe 411 is detachably connected to the outlet end 4121. The three first inlet ends 4122 are detachably connected to the outlet ends of the drying pipe 51, the humidification pipe 52, and the pressurization pipe 61, respectively, so that the drying pipe 51, the humidification pipe 52, and the pressurization pipe 61 can all be connected to the return pipe 411 through the first fluid distributor 412. The calibrator 1 includes a base 11, a second fluid distributor 12, and a third fluid distributor 13. The base 11 has a sealing cavity 1111 and is connected to the sealing cavity 1111. The first interface 1116 and the second interface 1117 are connected; the second fluid distributor 12 is provided with a first port 121 and a second access terminal 122, the second access terminal 122 is detachably connected to the first interface 1116, and there are three first ports 121, which are detachably connected to the inlet end of the drying pipeline 51, the inlet end of the humidifying pipeline 52 and the inlet end of the pressurizing pipeline 61, respectively, so that the drying pipeline 51, the humidifying pipeline 52 and the pressurizing pipeline 61 can all be connected to the base 11 through the second fluid distributor 12; the third fluid distributor 13 is provided with a second port 131 and a third access terminal 132, the third access terminal 132 is detachably connected to the second interface 1117, and there are three first ports 121, which are detachably connected to the inlet end of the drying pipeline 51, the humidifying pipeline 52 and ... so that the drying pipeline 51, the humidifying pipeline 52 and the pressurizing pipeline 61 can all be connected to the base 11 through the second fluid distributor 12; the third fluid distributor 13 is provided with a second port 131 and a third access terminal 132, the third access terminal 132 is detachably connected to the There are two flow meters, and the two second ports 131 are detachably connected to the outlet end of the return line 411 and the inlet end of the pressure relief line 62, respectively, so that both the return line 411 and the pressure relief line 62 can be connected to the base 11 through the third fluid distributor 13. Specifically, by setting the first fluid distributor 412, the second fluid distributor 12, and the third fluid distributor 13, multiple gas flows can be centrally merged, avoiding the complex wiring and interface redundancy problems caused by multiple independent loops in traditional solutions. This significantly simplifies the overall gas path layout, improves the system's compactness and maintainability, and the modular structure of the first fluid distributor 412, the second fluid distributor 12, and the third fluid distributor 13 also facilitates the subsequent expansion of more functional pipelines, such as... The system features a backup drying or humidification channel, and is compatible with other types of sensor calibration modules, providing a foundation for the construction of a multifunctional integrated calibration platform. Furthermore, the four pipelines and their corresponding fluid distributors are detachably connected, enhancing the system's modularity and maintainability. Its compact structure facilitates assembly and disassembly, reducing space requirements and making it portable. It also facilitates component replacement, cleaning, and future upgrades, making it particularly suitable for on-site testing and mobile calibration applications. It possesses promising engineering application prospects and widespread application value. Moreover, the four functional modules—drying, humidification, pressurization, and depressurization—are structurally independent and gas path isolated, avoiding cross-interference between different gas processing processes, thereby improving system stability and calibration accuracy.In this embodiment, the first fluid distributor 412 and the second fluid distributor 12 can be existing four-way connectors, and the third fluid distributor 13 can be an existing three-way connector. Furthermore, the first fluid distributor 412, the second fluid distributor 12, and the third fluid distributor 13 can also be existing multi-channel integrated valve blocks or multi-way fluid manifolds; this embodiment does not impose any limitations on these methods. In this embodiment, each pipeline and its corresponding fluid distributor can be detachably connected using threaded connections, snap-fit ​​connections, or flange connections. The components can be directly connected or connected via pipelines; this embodiment does not impose any limitations on these methods.

[0047] Please see Figure 1In one embodiment, the on / off control component 42 includes a human-machine interface unit 421, a control unit 422, and a valve assembly 423. The valve assembly 423 includes a first valve 4231, a second valve 4232, a third valve 4233, and a fourth valve 4234. The human-machine interface unit 421, the first valve 4231, the second valve 4232, the third valve 4233, and the fourth valve 4234 are all electrically connected to the control unit 422. The first valve 4231 is disposed on the drying pipeline 51 and is used to connect the drying pipeline 51 and the return passage 41. The second valve 4232 is disposed on the humidification pipeline 52 and is used to connect the humidification pipeline 52 and the return passage 41. The third valve 4233 is disposed on the pressurization pipeline 61 and is used to connect the pressurization pipeline 61. The pressure boosting pipeline 61 and the return passage 41 are connected; the fourth valve 4234 is installed on the pressure relief pipeline 62, and the outlet of the fourth valve 4234 is connected to the external environment. The fourth valve 4234 is used to connect the pressure relief pipeline 62 to the external environment. Specifically, by setting a human-machine interaction unit 421 to support human-machine interaction operation, the ease of use is improved. In this embodiment, the human-machine interaction unit 421 can be a device with display and input functions such as a computer, mobile phone or tablet. This embodiment does not limit this. Users can set target gas state values, such as preset humidity values ​​and preset pressure values, through the human-machine interaction unit 421, and observe the measurement data of the standard micro water sensor 2, standard pressure sensor 3 and the sensor to be calibrated in real time, which facilitates comparison analysis and parameter adjustment, and improves the operability and visualization of the system. By setting up the control unit 422, the level of intelligence can be improved. In this embodiment, the control unit 422 can be a control board with a microcontroller as the core controller. It can receive gas state parameter information from the standard micro water sensor 2 and the standard pressure sensor 3, and automatically determine which valve should be turned on or off based on the difference between the preset value and the actual detection value. It dynamically adjusts the internal gas humidity and pressure to keep them stable, which improves the system response speed and control accuracy. It eliminates the need for frequent manual operation of valves, avoids human error, and improves calibration efficiency and operational safety. Since the entire gas path switching process is uniformly coordinated and executed by the control unit 422, the opening or closing time and sequence of each valve can be precisely controlled, which helps to maintain the stability of the gas environment in the sealed cavity 1111, thereby significantly improving the consistency and repeatability of calibration results. Furthermore, the combined use of the first fluid distributor 412 and the four valves can more flexibly control the gas flow direction and realize automated operation.When pressure calibration is required, the control unit 422 compares the preset pressure value with the actual detected pressure value. When the actual detected pressure value is higher than the preset pressure value, the control unit 422 opens the fourth valve 4234, connecting the pressure relief line 62, and simultaneously closes the third valve 4233, disconnecting the pressurization line 61. This allows for pressure relief by connecting to the atmosphere through the fourth valve 4234, meeting the conditions required for calibration and ensuring the automation of the pressure regulation process. In this embodiment, the first valve 4231, second valve 4232, third valve 4233, and fourth valve 4234 can all be solenoid valves or gas relays; this embodiment does not limit the choice.

[0048] According to one embodiment of the present invention, the on / off control component 42 is manually controlled to enable or disable any one of the following pipelines: drying pipeline 51, humidifying pipeline 52, pressurizing pipeline 61, and depressurizing pipeline 62.

[0049] Please see Figure 1 and Figure 4In one embodiment, the return pipeline 411 includes a pipeline body 4111, a sealing cylinder 4112, and a pressure booster 4113. The sealing cylinder 4112 has a accommodating cavity 41121 for accommodating the pressure booster 4113. The inlet end of the sealing cylinder 4112 is detachably connected to the outlet end 4121, and the outlet end of the sealing cylinder 4112 is detachably connected to the inlet end of the pipeline body 4111, allowing the first fluid distributor 412 to communicate with the pipeline body 4111 through the sealing cylinder 4112. The outlet end of the pipeline body 4111 is detachably connected to the second port 131, allowing the pipeline body 4111 to communicate with the base 11 through the third fluid distributor 13. The pressure booster 4113 is electrically connected to the control unit 422 and is used to increase the gas pressure. Specifically, through the sealing cylinder 4112... The 112 is detachably connected to the pipeline body 4111 and the first fluid distributor 412, facilitating assembly and disassembly, reducing space occupation, and making it easy to carry, replace, clean, and upgrade components. When pressure calibration is required, the control unit 422 compares the preset pressure value with the actual detected pressure value. When the actual detected pressure value is lower than the preset pressure value, the control unit 422 opens the third valve 4233, connecting the pressurization pipeline 61, and simultaneously closes the fourth valve 4234, disconnecting the pressure relief pipeline 62. This pressurizes the return gas through the pressurization component 4113, allowing the gas to re-enter the sealed cavity 1111 at a stable pressure. This helps to quickly establish and maintain the set gas environment parameters, meeting the conditions required for calibration, thereby improving the response speed and data consistency of the calibration process. Through the coordinated operation of the standard sensor, control unit 422, and pressurization component 4113, the system can accurately control the gas pressure in the sealed cavity 1111, avoiding measurement errors caused by external interference or gas pressure fluctuations, thereby improving the accuracy and repeatability of the calibration results. In this embodiment, the sealing cylinder 4112 adopts a cylindrical structure. Both the pressurizing component 4113 and the control unit 422 are located within the accommodating cavity 41121. The sealing cylinder 4112 not only provides mechanical support and sealing protection for the pressurizing component 4113 and the control unit 422, but also has a threaded hole at one end for threaded connection to the second terminal block. The control signal to the control unit 422 is transmitted through the installation of the second terminal block, improving the overall compactness and modularity of the structure. In this embodiment, the pressurizing component 4113 can be an air pump, a compressed gas cylinder, or a scroll compressor; this embodiment is not limited to this.

[0050] Please see Figure 1In one embodiment, a dryer 511 is provided on the drying pipeline 51. The inlet end of the dryer 511 is detachably connected to the first port 121, and the outlet end of the dryer 511 is detachably connected to the inlet end of the first valve 4231, so that both ends of the dryer 511 can be connected to the second fluid distributor 12 and the first valve 4231 respectively. The dryer 511 is used to dry the gas. Specifically, the detachable connection between the dryer 511 and the second fluid distributor 12 and the first valve 4231 facilitates assembly and disassembly, reduces the space occupied, and facilitates carrying, replacement, cleaning, and subsequent upgrades of components. The dryer 511 is used to dry the gas from the calibrator 1, and at the same time connects the calibrator 1 and the gas path adjustment system 4 to realize gas path circulation. When the drying pipeline 51 is open, the dryer 511 can effectively absorb the moisture in the passing gas, thereby achieving the purpose of drying the gas, so that the output gas has a lower humidity level and meets the conditions required for calibration.

[0051] Please see Figure 1In one embodiment, the dryer 511 includes a drying tube 5111 and a desiccant 5112. The drying tube 5111 is provided with a receiving cavity 51111 and a first connector 51112 and a second connector 51113 communicating with the receiving cavity 51111. The receiving cavity 51111 is used to receive the desiccant 5112. The first connector 51112 is detachably connected to a first port 121, and the second connector 51113 is detachably connected to the inlet end of a first valve 4231, so that both ends of the drying tube 5111 can communicate with a second fluid distributor 12 and the first valve 4231, respectively. Specifically, the drying tube 5111 is used to contain the desiccant 5112, and the calibrator 1 and the gas path regulating system 4 are connected through the drying tube 5111. In this embodiment, the desiccant 5112 can be a color-changing silica gel desiccant 5112. The drying tube 5111 is filled with color-changing silica gel desiccant 5112. The color-changing silica gel desiccant 5112 has a strong moisture absorption capacity and can effectively absorb moisture in the passing gas. The color-changing silica gel desiccant 5112 usually changes from blue (or transparent) to pink (or other colors) after absorbing moisture, thereby indicating whether it needs to be replaced or regenerated. When humidity calibration is required, the control unit 422 compares the preset humidity value with the actual humidity detection value. When the actual humidity detection value is higher than the preset humidity value, the control unit 422 opens the first valve 4231 to connect the drying pipeline 51, and at the same time closes the second valve 4232 to disconnect the humidification pipeline 52. This allows the gas to be processed to enter one end of the drying tube 5111 from the calibrator 1, pass through the receiving cavity 51111 filled with color-changing silica gel desiccant 5112, and then flow out from the other end. During the process of the gas passing through the drying tube 5111, the moisture in it will be adsorbed by the color-changing silica gel desiccant 5112, thereby achieving the purpose of drying the gas. In this way, the output gas will have a lower humidity level, which meets the conditions required for calibration. Furthermore, since the color change of the color-changing silica gel desiccant 5112 can directly reflect its moisture absorption saturation, users can determine whether the desiccant 5112 needs to be replaced or regenerated by observing its color. If the desiccant 5112 completely changes to a color indicating saturation, it needs to be removed for heating regeneration or directly replaced with a new desiccant 5112 to maintain the drying effect, thereby avoiding the impact of untimely replacement of the desiccant 5112 on the experimental results.

[0052] According to one embodiment of the present invention, the desiccant 5112 may also be a molecular sieve, anhydrous calcium chloride, activated alumina, or phosphorus pentoxide.

[0053] Please see Figure 1In one embodiment, a humidity generator 521 is installed on the humidification pipeline 52. The inlet end of the humidity generator 521 is detachably connected to the first port 121, and the outlet end of the humidity generator 521 is detachably connected to the inlet end of the second valve 4232, so that both ends of the humidity generator 521 can be connected to the second fluid distributor 12 and the second valve 4232 respectively. The humidity generator 521 is used to regulate the humidity of the gas. Specifically, the detachable connection between the humidity generator 521 and the second fluid distributor 12 and the second valve 4232 facilitates assembly and disassembly, reduces the space occupied, and facilitates carrying, replacement, cleaning, and subsequent upgrades of components. In this embodiment, the humidity generator 521 is in the form of a straight-pipe gas washing bottle, with a direct path for gas to pass through. Gas flow occurs through the humidity generator 521, which is connected to the calibrator 1 and the gas path regulation system 4 at both ends. The humidity generator 521 contains a medium or solution that can increase the humidity of the gas. When humidity calibration is required, the control unit 422 compares the preset humidity value with the actual humidity detection value. When the actual humidity detection value is lower than the preset humidity value, the control unit 422 opens the second valve 4232 to connect the humidification pipeline 52, and at the same time closes the first valve 4231 to disconnect the drying pipeline 51. This allows the gas to be processed to enter the humidity generator 521 from the calibrator 1. When the dried gas passes through the humidity generator 521, it comes into contact with the surface of the medium or solution, thereby absorbing a certain amount of moisture and increasing its own humidity to meet the calibration requirements.

[0054] In this embodiment, the sealing cylinder 4112, dryer 511, humidity generator 521 and their corresponding components can be detachably connected by threaded connection, snap-fit ​​connection or flange connection. The components can be directly connected or connected by pipelines. This embodiment does not limit this.

[0055] Please see Figure 2 and Figure 3In one embodiment, the base 11 includes a base body 111, a cover plate 112, and a heating device. The base body 111 is provided with a sealing cavity 1111 and a first interface 1116, a second interface 1117, a first threaded hole 1112, a second threaded hole 1113, and a third threaded hole 1114 respectively communicating with the sealing cavity 1111. The top of the sealing cavity 1111 forms an opening 11111 for the sensor to be calibrated to enter and exit. The opening 11111 is covered by the cover plate 112. The standard micro-water sensor 2 is threadedly engaged with the first threaded hole 1112 so that the detection end of the standard micro-water sensor 2 extends into the sealing cavity. Inside the sealed cavity 1111, the standard pressure sensor 3 is threaded into the second threaded hole 1113 so that the detection end of the standard pressure sensor 3 extends into the sealed cavity 1111. The heating device is threaded into the third threaded hole 1114 so that the heating device can heat the gas. Specifically, the standard micro-moisture sensor 2, the standard pressure sensor 3, and the heating device are all installed in the first threaded hole 1112, the second threaded hole 1113, and the third threaded hole 1114 on the base body 111 by threaded connection, which is convenient for disassembly and assembly, facilitates the replacement of parts or periodic maintenance, and improves the maintainability and service life of the system. Moreover, through the standard micro-moisture sensor 2, the standard pressure sensor 3, and the heating device, humidity and pressure can be detected and temperature regulated simultaneously within the sealed cavity 1111, creating a multifunctional sealed environment that integrates measurement, calibration, and temperature control, suitable for the comprehensive calibration needs of various gas sensors. In this embodiment, the base body 111 adopts a hollow cylindrical structure, with a regular shape and moderate size, facilitating transportation and on-site deployment. Furthermore, both the base body 111 and the cover plate 112 can be made of lightweight insulating materials such as polyurethane, resulting in light weight and high strength, thus improving the portability and practicality of the overall device. Additionally, the heating device can be an existing electric heating wire heater, ceramic heater, or infrared heater; this embodiment does not limit its use.

[0056] Please see Figure 2 and Figure 3 In one embodiment, the calibrator 1 further includes a sealing element (not shown). A first groove 1115 is provided at one end of the seat body 111 facing the cover plate 112, and a second groove (not shown) is provided on the side of the cover plate 112 facing the seat body 111. The seat body 111 and the cover plate 112 are connected so that the first groove 1115 and the second groove communicate to form a sealing groove (not shown) for accommodating at least a portion of the structure of the sealing element. Specifically, the second groove on the cover plate 112 cooperates with the first groove 1115 on the seat body 111 to form a sealing groove for placing at least a portion of the structure of the sealing element, which can effectively prevent gas leakage, enhance the airtightness at the interface, ensure the stability and controllability of gas parameters in the sealing cavity 1111, and thus improve the accuracy of calibration data.

[0057] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment, the diameter of the seal is larger than the diameter of the first groove 1115 and the second groove; and / or, the cover plate 112 includes a cover body 1121 and a first terminal block (not shown), the seat body 111 is connected to the cover body 1121, the cover body 1121 is provided with a second groove on the side facing the seat body 111, and the side of the cover body 1121 away from the seat body 111 is connected to the first terminal block, and the on / off control component 42 is electrically connected to the sensor to be calibrated through the first terminal block; specifically, in this embodiment, the seal can be made of corrosion-resistant and highly elastic materials such as polypropylene. Since the diameter of the seal is larger than the diameter of the first groove 1115 and the second groove, there is a certain gap between the cover plate 112 and the seat body 111 in the untightened state, which facilitates installation and adjustment. During the tightening process, the seal will be compressed and deformed and come into close contact with the cover plate 112 and the seat body 111, thereby forming a good airtight seal. This structure effectively prevents gas leakage, ensures the stability of humidity and pressure parameters in the sealing cavity 1111, and improves the accuracy of calibration data. Two fourth threaded holes 11212 can be symmetrically arranged in the middle of the cover body 1121 for threaded connection with the first terminal block. The electrical connection between the sensor to be calibrated and the on / off control component 42 is realized through the first terminal block, resulting in neat wiring and facilitating debugging and data acquisition. In addition, a spare threaded hole can be provided in the cover body 1121 to reserve an interface for future expansion functions, enhancing the system's scalability.

[0058] In this embodiment, the base body 111 and the cover plate 112 are connected by bolts. Specifically, the base body 111 is provided with a plurality of fifth threaded holes 1118, and the cover plate 112 is provided with through holes 11211. The bolts pass through the through holes 11211 and are threadedly connected to the fifth threaded holes 1118, thereby realizing the installation and fixation of the base body 111 and the cover plate 112. There are multiple fifth threaded holes 1118, which are arranged at intervals along the circumference of the base body 111. The number of through holes 11211 and the number of bolts are consistent with the number of fifth threaded holes 1118 and are set in a one-to-one correspondence.

[0059] According to one embodiment of the present invention, the base body 111 and the cover plate 112, the base body 111 and the standard micro water sensor 2, and the base body 111 and the standard micro water sensor 2 can be installed and fixed by means of snap fasteners, flanges or quick-locking connectors.

[0060] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A gas state monitoring sensor calibration device, characterized in that, The gas state monitoring sensor calibration device includes: A calibrator having a sealed cavity for accommodating a sensor to be calibrated and a first port and a second port respectively communicating with the sealed cavity; A standard micro-moisture sensor is connected to the calibrator so that the detection end of the standard micro-moisture sensor extends into the sealed cavity to detect the humidity of the gas inside the sealed cavity; A standard pressure sensor is connected to the calibrator so that the detection end of the standard pressure sensor extends into the sealed cavity to detect the gas pressure inside the sealed cavity; A gas path regulating system, the gas path regulating system including a return path and an on / off control component, the inlet of the return path being connected to the outlet of the on / off control component, and the outlet of the return path being connected to the second port; A humidity calibration module, comprising a drying pipeline and a humidifying pipeline, wherein the two ends of the drying pipeline are respectively connected to the first port and the inlet of the on / off control component, and the two ends of the humidifying pipeline are respectively connected to the first port and the inlet of the on / off control component; The pressure calibration module includes a pressure boosting pipeline and a pressure relief pipeline. The two ends of the pressure boosting pipeline are respectively connected to the first port and the inlet of the on / off control component, and the two ends of the pressure relief pipeline are respectively connected to the second port and the external environment. The on / off control component can connect the drying pipeline and the return path, or connect the humidification pipeline and the return path, or connect the pressurization pipeline and the return path, or connect the pressure relief pipeline to the external environment.

2. The gas state monitoring sensor calibration device as described in claim 1, characterized in that, The return path includes a return pipeline and a first fluid distributor. The first fluid distributor has an outlet end and three first inlet ends. The inlet end of the return pipeline is detachably connected to the outlet end. The three first inlet ends are detachably connected to the outlet end of the drying pipeline, the outlet end of the humidifying pipeline, and the outlet end of the pressurizing pipeline, respectively, so that the drying pipeline, the humidifying pipeline, and the pressurizing pipeline can all be connected to the return pipeline through the first fluid distributor. The calibrator includes a base, a second fluid distributor, and a third fluid distributor. The base has a sealed cavity and a first interface and a second interface respectively communicating with the sealed cavity. The second fluid distributor has a first port and a second access end. The second access end is detachably connected to the first interface. There are three first ports, which are detachably connected to the inlet end of the drying pipeline, the inlet end of the humidification pipeline, and the inlet end of the pressurization pipeline, respectively, so that the drying pipeline, the humidification pipeline, and the pressurization pipeline can all communicate with the base through the second fluid distributor. The third fluid distributor is provided with a second port and a third access end. The third access end is detachably connected to the second interface. There are two second ports, which are detachably connected to the outlet end of the return pipeline and the inlet end of the pressure relief pipeline, respectively, so that both the return pipeline and the pressure relief pipeline can be connected to the base through the third fluid distributor.

3. The gas state monitoring sensor calibration device as described in claim 2, characterized in that, The on / off control component includes a human-machine interface unit, a control unit, and a valve assembly. The valve assembly includes a first valve, a second valve, a third valve, and a fourth valve. The human-machine interface unit, the first valve, the second valve, the third valve, and the fourth valve are all electrically connected to the control unit. The first valve is located on the drying pipeline and is used to connect the drying pipeline and the return path. The second valve is located on the humidification pipeline and is used to connect the humidification pipeline and the return path. The third valve is located on the pressurization pipeline and is used to connect the pressurization pipeline and the return path. The fourth valve is located on the pressure relief pipeline, and its outlet is connected to the external environment, thus connecting the pressure relief pipeline to the external environment.

4. The gas state monitoring sensor calibration device as described in claim 3, characterized in that, The return pipeline includes a pipeline body, a sealing cylinder, and a pressurizing component. The sealing cylinder has a accommodating cavity for accommodating the pressurizing component. The inlet end of the sealing cylinder is detachably connected to the outlet end, and the outlet end of the sealing cylinder is detachably connected to the inlet end of the pipeline body, so that the first fluid distributor can communicate with the pipeline body through the sealing cylinder. The outlet end of the pipeline body is detachably connected to the second port, so that the pipeline body can communicate with the base through the third fluid distributor. The pressurizing component is electrically connected to the control unit and is used to increase the gas pressure.

5. The gas state monitoring sensor calibration device as described in claim 3, characterized in that, A dryer is installed on the drying pipeline. The inlet end of the dryer is detachably connected to the first port, and the outlet end of the dryer is detachably connected to the inlet end of the first valve, so that both ends of the dryer can be connected to the second fluid distributor and the first valve respectively. The dryer is used to dry the gas.

6. The gas state monitoring sensor calibration device as described in claim 5, characterized in that, The dryer includes a drying tube and a desiccant. The drying tube is provided with a receiving cavity and a first connector and a second connector communicating with the receiving cavity. The receiving cavity is used to contain the desiccant. The first connector is detachably connected to the first port, and the second connector is detachably connected to the inlet end of the first valve, so that the two ends of the drying tube can be connected to the second fluid distributor and the first valve, respectively.

7. The gas state monitoring sensor calibration device as described in claim 3, characterized in that, A humidity generator is installed on the humidification pipeline. The inlet end of the humidity generator is detachably connected to the first port, and the outlet end of the humidity generator is detachably connected to the inlet end of the second valve, so that the two ends of the humidity generator can be connected to the second fluid distributor and the second valve respectively. The humidity generator is used to adjust the humidity of the gas.

8. The gas state monitoring sensor calibration device as described in claim 2, characterized in that, The base includes a base body, a cover plate, and a heating device. The base body is provided with the sealing cavity and a first interface, a second interface, a first threaded hole, a second threaded hole, and a third threaded hole that are respectively connected to the sealing cavity. The top of the sealing cavity forms an opening for the sensor to be calibrated to enter and exit. The opening is covered by the cover plate. The standard micro-water sensor is threadedly engaged with the first threaded hole so that the detection end of the standard micro-water sensor extends into the sealing cavity. The standard pressure sensor is threadedly engaged with the second threaded hole so that the detection end of the standard pressure sensor extends into the sealing cavity. The heating device is threadedly engaged with the third threaded hole so that the heating device can heat the gas.

9. The gas state monitoring sensor calibration device as described in claim 8, characterized in that, The calibrator further includes a seal, a first groove is provided at one end of the seat body facing the cover plate, and a second groove is provided on one side of the cover plate facing the seat body. The seat body is connected to the cover plate so that the first groove and the second groove communicate to form a sealing groove for accommodating at least a portion of the structure of the seal.

10. The gas state monitoring sensor calibration device as described in claim 9, characterized in that, The diameter of the seal is larger than the diameters of the first groove and the second groove; And / or, The cover plate includes a cover body and a first terminal block. The terminal block is connected to the cover body. The cover body has a second groove on the side facing the terminal block, and the side of the cover body away from the terminal block is connected to the first terminal block. The on / off control component is electrically connected to the sensor to be calibrated through the first terminal block.

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