System and method for measuring volume of closed hood by adopting tracer gas

Abstract

The invention discloses a system and a method for measuring the volume of a closed hood by adopting tracer gas. The system comprises a tracer gas quantitative injection unit, a standard volume closed hood, a tracer gas detection unit and a display and control integrated unit, the gas outlet end of the tracer gas quantitative injection unit is connected with the gas inlet end of the standard volume sealing cover, the sampling end of the standard volume sealing cover is connected with the data input end of the tracer gas detection unit, and the wireless communication end of the tracer gas detection unit is connected with the wireless communication end of the display and control integrated unit. The remote control end of the display and control integrated unit is connected with the remote control end of the tracer gas quantitative injection unit.

Description

Technical Field

[0001] The present invention belongs to the technical field of closed hood volume measurement, and in particular relates to a system and method for measuring the volume of a closed hood by using tracer gas. Background Art

[0002] During the high and low temperature tests of gas-insulated switchgear, a sealing test is required. Currently, the volume is generally measured by building a cubic enclosure or by approximating the shape of the enclosure.

[0003] Currently, the sealing test mainly adopts the buckle cover method to place the test sample in a closed plastic cover or metal cover. After a certain period of time, the concentration of the tracer gas in the cover is measured using a calibrated gas leak detector, and the relative leakage rate is determined by calculation. This quantitative leak detection method requires subtracting the volume of the test sample from the volume of the closed cover to obtain the measured volume and substituted it into the leakage rate formula for calculation.

[0004] The method of estimating the measured volume based on the shape of the enclosure has poor practical operability and is significantly affected by various objective measurement and subjective judgment factors, making it difficult to effectively reduce the uncertainty of the measured volume. The method of estimating the measured volume by building a cubic enclosure is limited in use when the product is large, and the results are affected by the regularity of the built cubic enclosure, which also fails to effectively reduce the uncertainty of the measured volume. Summary of the Invention

[0005] The present invention aims to overcome the inaccuracy of existing enclosure volume measurement methods and proposes a system and method for measuring enclosure volume using tracer gas. This system calculates the enclosure volume more accurately and reduces the uncertainty of volume measurement during sealing tests.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a system for measuring the volume of an enclosure using tracer gas, comprising a tracer gas quantitative injection unit, a standard volume enclosure, a tracer gas detection unit, and an integrated display and control unit; The gas outlet of the tracer gas quantitative injection unit is connected to the gas inlet of the standard volume sealing cover, the sampling end of the standard volume sealing cover is connected to the data input end of the tracer gas detection unit, the wireless communication end of the tracer gas detection unit is connected to the wireless communication end of the display and control integrated unit, and the remote control end of the display and control integrated unit is connected to the remote control end of the tracer gas quantitative injection unit.

[0007] Furthermore, the tracer gas quantitative injection unit includes a tracer gas storage cylinder, a mass flow controller, a pressure reducing valve, a first solenoid valve, a tracer gas output port, an air blowing pump, an air inlet, and a control cable interface; The output end of the tracer gas storage cylinder is connected to the input end of the mass flow controller, the output end of the mass flow controller is connected to one end of a first solenoid valve, the other end of the first solenoid valve is connected to a tracer gas output port, and the tracer gas output port is connected to an air inlet end of a standard volume sealing cover; the pressure reducing valve is provided between the output end of the tracer gas storage cylinder and the input end of the mass flow controller; The air inlet is connected to the input end of the air pump, and the output end of the air pump is connected to the other end of the first solenoid valve; The mass flow controller, the first solenoid valve, and the air pump are respectively connected to a control cable interface, and the control cable interface is connected to a remote control terminal of the integrated display and control unit.

[0008] Furthermore, a second solenoid valve is provided between the air inlet and the input end of the air pump; The pressure reducing valve and the second solenoid valve are respectively connected to the control cable interface.

[0009] Furthermore, the tracer gas output port is connected to the gas inlet end of the standard volume sealing cover via an air pipe; The control cable interface is connected to the remote control terminal of the display and control integrated unit via a control cable.

[0010] Furthermore, the standard volume enclosure includes a closed container with a known volume, and a sampling point and a self-sealing gas injection port are provided on the closed container with a known volume. The self-sealing gas injection port is connected to the gas outlet end of the tracer gas quantitative injection unit, and the sampling point is connected to the data input end of the tracer gas detection unit. A number of sampling points are provided, and each sampling point is a self-sealing sampling point.

[0011] Furthermore, a circulation fan is provided inside the closed container with a known volume.

[0012] Furthermore, the tracer gas detection unit includes a tracer gas detector, the tracer gas detector is provided with a first wireless communication module, and the first wireless communication module is connected to the wireless communication terminal of the integrated display and control unit.

[0013] Furthermore, the integrated display and control unit includes a centralized control computing module and a handheld terminal device. The centralized control computing module is provided with a second wireless communication module and a second control cable interface. The second wireless communication module is respectively connected to the handheld terminal device and the first wireless communication module. The second control cable interface is connected to the remote control end of the tracer gas quantitative injection unit.

[0014] Furthermore, the second control cable interface is connected to the remote control terminal of the tracer gas quantitative injection unit via a control cable, and the handheld terminal device is provided with a human-computer interaction interface.

[0015] In a second aspect, the present invention provides a method for measuring the volume of an enclosure using tracer gas, wherein the method comprises the following steps: S1. After the pipeline is purged and cleaned, the tracer gas detection unit samples the gas concentration inside the standard volume closed cover at multiple points, calculates the average of the sampling values, and obtains the gas concentration before the tracer gas is quantitatively injected; S2. The integrated display and control unit remotely triggers the tracer gas quantitative injection unit to release gas into the standard volume enclosure according to the preset volume. After the release is completed, the tracer gas quantitative injection unit and the standard volume enclosure are disconnected, and the residual gas in the pipeline is purged into the standard volume enclosure. The tracer gas detection unit samples the gas in the standard volume enclosure at multiple points, calculates the average of the sampled values, and obtains the gas concentration after the tracer gas quantitative injection; S3. The integrated display and control unit calculates the volume of the standard volume enclosure using the gas concentration before and after the tracer gas is quantitatively injected, and the volume of the injected gas; S4. Comparing the calculated volume value of the standard volume enclosure with the volume data of the standard volume enclosure, and performing a self-calibration of the system for enclosure volume measurement using tracer gas; S5. After self-calibration is completed, use the method of S1-S3 to measure the volume of the closed cover.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention proposes a system for measuring the volume of a closed hood using tracer gas. This system achieves precise quantitative injection of tracer gas through high-precision flow control, and obtains the measured volume of the closed hood through automatic system control and software calculation, thereby reducing the uncertainty of the measured volume. The system fully considers possible influencing factors during the detection process, adopts self-cleaning and self-calibration mechanisms to improve the accuracy of the measurement results, and utilizes wireless data transmission and integrates Internet of Things technology to solve the pain points of traditional volume measurement methods in terms of measurement accuracy, operational convenience, and method adaptability. The system is particularly suitable for gas leak detection scenarios in laboratories and can be expanded to all occasions requiring quantitative gas injection and closed space volume measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. In the drawings: Figure 1 The figure shows a simplified structural diagram of a system for measuring the volume of a closed hood using tracer gas.

[0018] Among them, G1 is the tracer gas storage cylinder, V1 is the pressure reducing valve, MFC is the mass flow controller, V2 is the first solenoid valve, V3 is the second solenoid valve, P1 is the tracer gas output port, Pump1 is the air pump, P2 is the air inlet, P3 is the first control cable interface, Cable1 is the control cable, P5 is the second control cable interface, Cube is a closed container with known volume, SP1 is the first sampling point, SP2 is the second sampling point, SP3 is the third sampling point, P4 is the self-sealing gas injection port, F1 is the circulating fan, T1 is the tracer gas detector, C1 is the centralized control calculation module, W1 is the first wireless communication module, W2 is the second wireless communication module, and D1 is the handheld terminal device. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0020] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0023] Example 1 See also Figure 1 , a system for measuring the volume of a closed hood using tracer gas, comprising a tracer gas quantitative injection unit, a standard volume closed hood, a tracer gas detection unit and an integrated display and control unit; The gas outlet of the tracer gas quantitative injection unit is connected to the gas inlet of the standard volume sealing cover, the sampling end of the standard volume sealing cover is connected to the data input end of the tracer gas detection unit, the wireless communication end of the tracer gas detection unit is connected to the wireless communication end of the display and control integrated unit, and the remote control end of the display and control integrated unit is connected to the remote control end of the tracer gas quantitative injection unit.

[0024] This embodiment precisely captures minute volume changes by quantitatively injecting a known volume of tracer gas, leveraging its uniform diffusion and detectability. The volume can be inferred from the rising gas concentration within the enclosure, eliminating the manual calculation errors caused by irregular shapes in traditional methods. No enclosure modification is required, making it suitable for large specimens. By adjusting the injected gas volume and detection time, a wide measurement range, from milliliters to cubic meters, can be covered. The integrated display and control unit monitors data in real time via wireless communication, automatically adjusting the gas injection volume and uploading tracer gas detection data, reducing manual intervention.

[0025] Supporting data storage and abnormality alarms, engineers can remotely monitor the measurement process via mobile devices. The integrated display and control interface integrates tracer gas injection, self-cleaning operations, tracer gas detection data, volume calculation results, and historical records. Compared to traditional methods, efficiency and accuracy are significantly improved. Each unit can be independently upgraded, extending the system lifecycle.

[0026] The tracer gas quantitative injection unit includes a tracer gas storage cylinder G1, a mass flow controller (MFC), a pressure reducing valve (V1), a first solenoid valve (V2), a tracer gas output port (P1), an air pump (Pump1), an air inlet (P2), and a control cable interface (P3). The output of the tracer gas storage cylinder G1 is connected to the input of the mass flow controller (MFC), which is connected to one end of the first solenoid valve (V2). The other end of the first solenoid valve (V2) is connected to the tracer gas output port (P1), which is connected to the air inlet of a standard volume closure. The pressure reducing valve (V1) is disposed between the output of the tracer gas storage cylinder G1 and the input of the mass flow controller (MFC). The air inlet (P2) is connected to the input of the air pump (Pump1), which is connected to the other end of the first solenoid valve (V2). The mass flow controller (MFC), the first solenoid valve (V2), and the air pump (Pump1) are each connected to the control cable interface (P3), which is connected to the remote control terminal of the integrated display and control unit.

[0027] A second solenoid valve V3 is provided between the air inlet P2 and the input end of the air pump Pump1 ; the pressure reducing valve V1 and the second solenoid valve V3 are respectively connected to the control cable interface P3 .

[0028] The tracer gas output port P1 is connected to the air inlet end of the standard volume closed cover through an air pipe; the control cable interface P3 is connected to the remote control end of the display and control integrated unit through a control cable Cable1.

[0029] The standard volumetric enclosure includes a Cube, a closed container with a known volume. The Cube is equipped with a sampling point and a self-sealing gas injection port P4. The self-sealing gas injection port P4 is connected to the gas outlet of the tracer gas quantitative injection unit, and the sampling point is connected to the data input of the tracer gas detection unit. Several self-sealing sampling points are provided. A circulating fan F1 is installed inside the Cube.

[0030] The tracer gas detection unit includes a tracer gas detector T1 . The tracer gas detector T1 is provided with a first wireless communication module W1 . The first wireless communication module W1 is connected to the wireless communication terminal of the integrated display and control unit.

[0031] The integrated display and control unit includes a centralized control and computing module C1 and a handheld terminal device D1. The centralized control and computing module C1 is equipped with a second wireless communication module W2 and a second control cable interface P5. The second wireless communication module W2 is connected to the handheld terminal device D1 and the first wireless communication module W1, respectively. The second control cable interface P5 is connected to the remote control terminal of the tracer gas quantitative injection unit. The second control cable interface P5 is connected to the remote control terminal of the tracer gas quantitative injection unit via a control cable Cable1. The handheld terminal device D1 is equipped with a human-computer interaction interface.

[0032] Example 2 A method for measuring the volume of an enclosure using tracer gas, using the system for measuring the volume of an enclosure using tracer gas in Example 1, includes the following steps: S1. After the pipeline is purged and cleaned, the tracer gas detection unit samples the gas concentration inside the standard volume closed cover at multiple points, calculates the average of the sampling values, and obtains the gas concentration before the tracer gas is quantitatively injected; S2. The integrated display and control unit remotely triggers the tracer gas quantitative injection unit to release gas into the standard volume enclosure according to the preset volume. After the release is completed, the tracer gas quantitative injection unit and the standard volume enclosure are disconnected, and the residual gas in the pipeline is purged into the standard volume enclosure. The tracer gas detection unit samples the gas in the standard volume enclosure at multiple points, calculates the average of the sampled values, and obtains the gas concentration after the tracer gas quantitative injection; S3. The integrated display and control unit calculates the volume of the standard volume enclosure using the gas concentration before and after the tracer gas is quantitatively injected, and the volume of the injected gas; S4. Comparing the calculated volume value of the standard volume enclosure with the volume data of the standard volume enclosure, and performing a self-calibration of the system for enclosure volume measurement using tracer gas; S5. After self-calibration is completed, use the method of S1-S3 to measure the volume of the closed cover.

[0033] Example 3 A system for measuring the volume of an enclosure using a tracer gas, such as Figure 1 As shown in the figure, the system mainly consists of four parts: a tracer gas quantitative injection unit, a standard volume enclosure, a tracer gas detection unit, and an integrated display and control unit. Tracer gas is a general term for gases that can be fully mixed with the gas to be tested, have stable properties, and can be detected at extremely low concentrations.

[0034] The tracer gas quantitative injection unit mainly consists of a tracer gas storage cylinder G1, a pressure reducing valve V1, a mass flow controller MFC, a first solenoid valve V2, an air pump Pump1, a second solenoid valve V3, an air inlet P2, a control cable interface P3 and a tracer gas output port P1. The various components are connected by air pipes. The pressure reducing valve V1 regulates the gas pressure in the tracer gas storage cylinder G1 to within the operating range of the mass flow controller MFC. The first solenoid valve V2 is a ball valve, and the mass flow controller MFC controls the volume of tracer gas passing through the ball valve and the tracer gas output port P1. The ball valve controls the output of tracer gas. Because the volume of each quantitative output is small, residual tracer gas in the pipeline can cause significant error in the measurement results. The system is designed with a self-purification mechanism. The air pump Pump1 is used to purge the pipeline between V2, P1, and P4 through the air inlet P2 and the second solenoid valve V3. In a non-polluted environment, the air inlet P2 can be directly connected to the atmosphere or connected to an external dry air source. The control cable interface P3 is connected to the control cable interface P5 via the control cable Cable1 to achieve automatic remote control of the pressure reducing valve V1, mass flow controller MFC, first solenoid valve V2, air pump Pump1, and second solenoid valve V3 in the tracer gas quantitative injection unit. The tracer gas output port P1 and the self-sealing gas injection port P4 are connected by air pipes.

[0035] The standard volumetric enclosure consists of a known-volume closed container (Cube), sampling points SP1-SP3, a self-sealing air injection port P4, and a circulating fan F1. The known-volume closed container (Cube) can be a cube. The sampling points are self-sealing.

[0036] The tracer gas detection unit is mainly composed of a tracer gas detector T1 and a first wireless communication module W1. Wireless communication data transmission is achieved between T1 and C1 through W1.

[0037] The integrated display and control unit primarily consists of a centralized control and computing module C1, a second wireless communication module W2, and a handheld terminal device D1. D1 is designed with a human-machine interface for display and control, while C1 is the execution module for centralized control and data calculation. Wireless communication between D1 and C1 is achieved through W2. Wireless communication is also possible between the first wireless communication module W1 and the second wireless communication module W2.

[0038] The specific working process of a system for measuring the volume of a closed hood using tracer gas is as follows: a. Store the tracer gas in G1; b. Use the air tube to connect P1 and P4; c. Use Cable 1 to connect P3 and P5; d. Start V3 and Pump1 on the D1 human-computer interaction interface to perform self-cleaning of the pipeline between V2-P1-P4; e. Use a tracer gas detector to obtain gas concentration data before quantitative tracer gas injection at sampling points SP1 to SP3. Transmit the detection data to C1 via W1, and take the average value of the upper, middle, and lower points as the final measurement result. f. Adjust the V1 setting parameters on the D1 human-computer interaction interface to adjust the gas pressure in G1 to within the operating range of the MFC; g. Set the gas volume output value per unit time of the MFC under standard conditions according to the detection parameters on the D1 human-computer interaction interface; h. Remotely control V1 and V2 on the D1 human-computer interaction interface to inject quantitative tracer gas into the Cube; i. Start V3 and Pump1 on the D1 human-computer interaction interface to perform self-cleaning of the pipeline between V2-P1-P4; j. Remotely control and activate F1 on the D1 human-computer interaction interface to obtain a uniform tracer gas concentration in the Cube. After the tracer gas injection is completed, remove the gas pipe connecting P1 and P4; k. Use a tracer gas concentration detector to obtain gas concentration data after quantitative injection of tracer gas at sampling points SP1 to SP3. Transmit the detection data to C1 via W1. Similarly, take the average value of the upper, middle, and lower points as the final measurement result. l. C1 uses the calculation formula specified in the standard and the obtained transmission data to calculate the volume of the Cube and transmits the result through W2 to display it on the D1 human-computer interaction interface; Compare the calculated value with the volume data of the Cube standard cube to complete the self-calibration of the system for closed cover volume measurement using tracer gas; n. After the self-calibration is completed, if the measured volume error is within the allowable range, the tracer gas quantitative injection system can be used to connect P1 and other sealing test enclosures through the gas pipe to calculate the measured volume according to the method in steps a to l.

[0039] The calibration procedure consists of injecting a known amount of tracer gas into the enclosure. A small amount of tracer gas is injected into the enclosure, the amount of gas injected should be of the same order of magnitude as the amount corresponding to the maximum permissible leak rate. The tracer gas concentration C in the enclosure is measured with a probe before and after injection. The measured volume is calculated as follows: V m =V c -V1=V injected / △C Where: V m - measure volume in cubic meters; V c - the volume of the enclosure, in cubic meters; V1——volume of the sample, in cubic meters; V injected ——tracer gas volume, in cubic meters; △C——Increase in tracer gas concentration in the closed hood, in microliters per liter.

[0040] In order to calculate a more accurate measurement volume, the procedure should be repeated twice and the average of the two measurements used as the measurement volume.

[0041] This embodiment features high-precision quantitative tracer gas injection; a self-purifying mechanism for the tracer gas injection pipeline reduces measurement errors; self-calibration using a closed container with a known volume, and system accuracy verification before each use; a centralized control and automatic calculation module improves system integration; and a wireless communication module and handheld terminal device enable automatic data collection between system units and facilitate system operation. This embodiment can be expanded to all applications requiring quantitative gas injection and enclosed space volume measurement.

[0042] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of the present teachings should be determined not with reference to the foregoing description, but rather with reference to the preceding claims, along with the full scope of equivalents to which such claims are entitled. For the purpose of completeness, all articles and references, including the disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the preceding claims is not a disclaimer of such subject matter, nor should it be interpreted that the applicants did not consider such subject matter to be part of the disclosed inventive subject matter.

[0043] The above content is a further detailed description of the present invention. It cannot be considered that the specific implementation methods of the present invention are limited to these. For ordinary technicians in the technical field to which the present invention belongs, they can make several simple deductions or substitutions without departing from the concept of the present invention, which should be regarded as belonging to the scope of protection determined by the submission of the present invention.

Claims

1. A system for measuring the volume of a closed enclosure using tracer gas, characterized in that: It includes a tracer gas quantitative injection unit, a standard volume sealing cover, a tracer gas detection unit and an integrated display and control unit; The gas outlet of the tracer gas quantitative injection unit is connected to the gas inlet of the standard volume sealing cover, the sampling end of the standard volume sealing cover is connected to the data input end of the tracer gas detection unit, the wireless communication end of the tracer gas detection unit is connected to the wireless communication end of the display and control integrated unit, and the remote control end of the display and control integrated unit is connected to the remote control end of the tracer gas quantitative injection unit.

2. A system for measuring the volume of a closed enclosure using tracer gas according to claim 1, characterized in that: The tracer gas quantitative injection unit includes a tracer gas storage cylinder (G1), a mass flow controller (MFC), a pressure reducing valve (V1), a first solenoid valve (V2), a tracer gas output port (P1), an air pump (Pump1), an air inlet (P2) and a control cable interface (P3); The output end of the tracer gas storage cylinder (G1) is connected to the input end of a mass flow controller (MFC), the output end of the mass flow controller (MFC) is connected to one end of a first solenoid valve (V2), the other end of the first solenoid valve (V2) is connected to a tracer gas output port (P1), and the tracer gas output port (P1) is connected to the gas inlet end of a standard volume sealing cover; the pressure reducing valve (V1) is provided between the output end of the tracer gas storage cylinder (G1) and the input end of the mass flow controller (MFC); The air inlet (P2) is connected to the input end of the air pump (Pump1), and the output end of the air pump (Pump1) is connected to the other end of the first solenoid valve (V2); The mass flow controller (MFC), the first solenoid valve (V2), and the air pump (Pump1) are respectively connected to a control cable interface (P3), and the control cable interface (P3) is connected to a remote control terminal of the integrated display and control unit.

3. The system for measuring the volume of a closed enclosure using tracer gas according to claim 2, wherein: A second solenoid valve (V3) is provided between the air inlet (P2) and the input end of the air pump (Pump1); The pressure reducing valve (V1) and the second solenoid valve (V3) are respectively connected to a control cable interface (P3).

4. The system for measuring the volume of a closed enclosure using tracer gas according to claim 2, wherein: The tracer gas output port (P1) is connected to the gas inlet end of the standard volume sealing cover via an air pipe; The control cable interface (P3) is connected to the remote control terminal of the integrated display and control unit via a control cable (Cable1).

5. The system for measuring the volume of a closed enclosure using tracer gas according to claim 1, wherein: The standard volume enclosure comprises a closed container (Cube) with a known volume, wherein a sampling point and a self-sealing gas injection port (P4) are provided on the closed container (Cube), wherein the self-sealing gas injection port (P4) is connected to the gas outlet of a tracer gas quantitative injection unit, and the sampling point is connected to the data input end of a tracer gas detection unit. A plurality of sampling points are provided, and each sampling point is a self-sealing sampling point.

6. The system for measuring the volume of a closed enclosure using tracer gas according to claim 5, characterized in that: A circulation fan (F1) is provided inside the closed container (Cube) of known volume.

7. The system for measuring the volume of a closed enclosure using tracer gas according to claim 1, wherein: The tracer gas detection unit comprises a tracer gas detector (T1), the tracer gas detector (T1) is provided with a first wireless communication module (W1), and the first wireless communication module (W1) is connected to the wireless communication terminal of the integrated display and control unit.

8. The system for measuring the volume of a closed enclosure using tracer gas according to claim 7, characterized in that: The integrated display and control unit comprises a centralized control computing module (C1) and a handheld terminal device (D1); the centralized control computing module (C1) is provided with a second wireless communication module (W2) and a second control cable interface (P5); the second wireless communication module (W2) is connected to the handheld terminal device (D1) and the first wireless communication module (W1), respectively; and the second control cable interface (P5) is connected to a remote control terminal of a tracer gas quantitative injection unit.

9. The system for measuring the volume of a closed enclosure using tracer gas according to claim 8, characterized in that: The second control cable interface (P5) is connected to the remote control terminal of the tracer gas quantitative injection unit via a control cable (Cable1), and the handheld terminal device (D1) is provided with a human-machine interaction interface.

10. A method for measuring the volume of an enclosure using tracer gas, using a system for measuring the volume of an enclosure using tracer gas as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1. After the pipeline is purged and cleaned, the tracer gas detection unit samples the gas concentration inside the standard volume closed cover at multiple points, calculates the average of the sampling values, and obtains the gas concentration before the tracer gas is quantitatively injected; S2. The integrated display and control unit remotely triggers the tracer gas quantitative injection unit to release gas into the standard volume enclosure according to the preset volume. After the release is completed, the tracer gas quantitative injection unit and the standard volume enclosure are disconnected, and the residual gas in the pipeline is purged into the standard volume enclosure. The tracer gas detection unit samples the gas in the standard volume enclosure at multiple points, calculates the average of the sampled values, and obtains the gas concentration after the tracer gas quantitative injection; S3. The integrated display and control unit calculates the volume of the standard volume enclosure using the gas concentration before and after the tracer gas is quantitatively injected, and the volume of the injected gas; S4. Comparing the calculated volume value of the standard volume enclosure with the volume data of the standard volume enclosure, and performing a self-calibration of the system for enclosure volume measurement using tracer gas; S5. After self-calibration is completed, use the method of S1-S3 to measure the volume of the closed cover.

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