System for measuring gas leakage and material barrier characteristics in transparent closed container

Abstract

The utility model discloses a system for measuring gas leakage and material barrier characteristics in a transparent closed container, which comprises a test box, a first adjusting assembly, a gas distribution assembly, a second adjusting assembly and a tunable diode laser absorption spectroscopy (TDLAS) measuring assembly, the sealing cavity is used for containing the closed container, the first adjusting assembly is communicated with the sealing cavity and used for adjusting the temperature, humidity and pressure in the sealing cavity, the gas distribution assembly is communicated with the closed container, and the second adjusting assembly is arranged between the gas distribution assembly and the closed container and suitable for being communicated with the closed container. The TDLAS measurement assembly is arranged on the test box and communicated with the sealing cavity, and the TDLAS measurement assembly is used for testing the target gas concentration of the closed container so as to detect the leakage rate in the closed container. The system for measuring the gas leakage and material barrier characteristics in the transparent closed container has the advantages of simplicity in test, accurate test result and the like.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, specifically to a system for measuring gas leakage and material barrier properties inside a transparent sealed container. Background Technology

[0002] The airtightness of food and pharmaceutical packaging systems refers to the ability of a packaging system to prevent loss of its contents, prevent microbial contamination, and prevent the entry of harmful gases or other substances, thereby ensuring that the product continues to meet safety and quality requirements. It is an important manifestation of the protective performance of packaging containers and a crucial factor in ensuring the quality and safety of food and pharmaceuticals throughout their entire life cycle. This study establishes an experimental system to investigate and analyze gas leakage and material barrier characteristics within transparent sealed containers, providing non-intrusive and rapid detection and analysis of airtightness and leakage and material barrier characteristics of packaging materials for food, pharmaceuticals, and medical devices.

[0003] In related technologies, drug packaging testing is cumbersome and the test results are inaccurate. Utility Model Content

[0004] This utility model is based on the inventor's discovery and understanding of the following facts and problems:

[0005] The following methods are generally used to measure the sealing integrity and packaging materials of food, medicine, medical devices, etc.: (1) Color water leak detection method: the color change is observed by the naked eye to determine whether a leak has occurred. This method is prone to misjudgment, has low sensitivity, poor stability and will contaminate food and medicine, but it is simple to operate. (2) High voltage discharge micro-hole leak detection method: the high voltage transformer increases the voltage of the AC power, so that the spark discharge between the two electrodes of the transmitter generates a high frequency current. After passing through the high frequency transformer, the spark is finally emitted at the tip electrode. The spark acts on the free residual gas in the container to ionize and produce different colored glows due to different gas properties. The vacuum degree is determined from the intensity and color of the glow. This method is outdated and the high voltage is easy to contact the product when penetrating the inside of the product. It may damage the activity and other properties of biological products. It depends on the operation and judgment of personnel, and the inspection results vary greatly. (3) Microbial leak detection method: it cannot achieve rapid online detection and is easy for microorganisms to invade the drug, causing secondary pollution. The measurement results have poor repeatability.

[0006] This utility model aims to at least partially solve one of the technical problems in the related art.

[0007] Therefore, embodiments of this utility model propose a measurement system for gas leakage and material barrier properties inside a transparent sealed container that has simple testing procedures and accurate test results.

[0008] A gas leakage and material barrier properties measurement system for a transparent sealed container according to an embodiment of the present invention includes: a test chamber having a sealed cavity for placing a sealed container; a first adjustment component communicating with the sealed cavity for adjusting the temperature, humidity, and pressure within the sealed cavity; a gas distribution component communicating with the sealed container for mixing a target gas and a reference gas and introducing them into the sealed container; and a second adjustment component disposed between the gas distribution component and the sealed container, adapted to communicate with the sealed container for adjusting the pressure within the sealed container. The DLAS measurement component is mounted on the test chamber and communicates with the sealed cavity. The DLAS measurement component is used to test the target gas concentration in the sealed container to detect leakage and barrier characteristics. The measurement system has a first state and a second state. In the first state, the first adjustment component is activated to adjust the temperature, humidity, and pressure within the sealed cavity, and the gas distribution component is activated to fill the sealed container with gas. In the second state, the DLAS measurement component is activated to detect changes in the target gas concentration within the sealed container, and the first adjustment component adjusts one of the parameters of temperature, humidity, and pressure within the sealed cavity.

[0009] This utility model's embodiment of a transparent sealed container gas leakage and material barrier characteristic measurement system includes a test chamber, a first adjustment component, a gas distribution component, a second adjustment component, and a TDLAS measurement component. It analyzes the leakage rate and barrier characteristics of different transparent sealing materials under various gas, temperature, humidity, and pressure conditions in micro-holes. Using TDLAS technology, it simultaneously measures the changes in gas concentrations over time before and after the experiment, quantitatively studying the long-term barrier characteristics of different materials against different gases. This enables non-destructive testing of gas concentrations within sealed containers, providing accurate results without relying on human operation or judgment, and offering high testing efficiency.

[0010] In some embodiments, the gas distribution assembly includes: a first storage bottle and a second storage bottle, the first storage bottle for storing a target gas and the second storage bottle for storing a reference gas; a filter element, one end of which is connected to the first and second storage bottles respectively, so that the target gas and the reference gas flow into the filter element, the filter element for filtering impurities and moisture in the target gas and the reference gas, and the other end of which is connected to the sealed container so that the target gas and the reference gas filtered by the filter element flow into the sealed container.

[0011] In some embodiments, the gas distribution assembly further includes: a first mass flow meter, the two ends of which are respectively connected to the first storage bottle and the filter element, the first mass flow meter being used to control the flow rate of the target gas flowing out of the first storage bottle; and a second mass flow meter, the two ends of which are respectively connected to the second storage bottle and the filter element, the second mass flow meter being used to control the flow rate of the reference gas flowing out of the second storage bottle.

[0012] In some embodiments, the first regulating component includes: a detection element disposed within the sealed cavity for detecting the temperature, humidity, and pressure within the sealed cavity; a temperature and humidity control element disposed within the sealed cavity for controlling the temperature and humidity within the sealed cavity to be constant; an inflation element and a vacuum element, both of which are in communication with the sealed cavity, wherein the inflation element is used to inject a reference gas into the sealed cavity to increase the pressure within the sealed cavity, and the vacuum element is used to extract gas from the sealed cavity to reduce the pressure within the sealed cavity.

[0013] In some embodiments, the inflation component includes a third gas storage cylinder for storing reference gas and communicating with the sealed cavity so as to introduce reference gas into the sealed cavity.

[0014] In some embodiments, the measurement system has a first state and a second state. In the first state, the third gas cylinder is in communication with the sealed cavity and the sealed cavity is closed, so that the reference gas in the third gas cylinder is introduced into the sealed cavity to increase the pressure in the sealed cavity. In the second state, the third gas cylinder is in communication with the sealed cavity and the sealed cavity is in communication with the outside, so that the reference gas in the third gas cylinder is introduced into the sealed cavity to purge the sealed cavity.

[0015] In some embodiments, both the second regulating component and the vacuum component are vacuum pumps.

[0016] In some embodiments, the detection element includes a sensor disposed on the outer periphery of the test chamber and communicating with the sealed cavity. The sensor is used to detect the temperature and humidity inside the sealed cavity, so that the constant temperature and humidity element is activated when either the temperature or humidity inside the sealed cavity deviates from a preset value.

[0017] In some embodiments, the detection element further includes a pressure gauge disposed on the outer periphery of the test chamber and communicating with the sealed cavity. The pressure gauge is used to detect the pressure inside the sealed cavity so that when the pressure inside the sealed cavity deviates from a preset value, one of the inflation element and the vacuum element is activated.

[0018] In some embodiments, the TDLAS measurement component includes: a signal generator for emitting a low-frequency triangular wave superimposed with a high-frequency sine wave; a laser driver and a laser diode, the laser driver being connected to the signal generator and the laser diode respectively, so that the laser driver receives the sine wave from the signal generator to drive the laser diode to generate a modulated laser signal; and a laser sight disposed on the side of the laser diode away from the laser driver and opposite to the laser diode, wherein the laser signal generated by the laser diode is respectively transmitted through... Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the gas leakage and material barrier properties measurement system inside a transparent sealed container according to an embodiment of the present invention.

[0020] 100. Measurement system for gas leakage and material barrier properties in a transparent, sealed container;

[0021] Test chamber 1; First adjustment component 2; Detector 21; Sensor 211; Pressure gauge 212; Temperature and humidity control component 22; Gas filling component 23; Vacuum component 24; Gas distribution component 3; First storage bottle 31; Second storage bottle 32; Filter 33; First mass flow meter 34; Second mass flow meter 35; Second adjustment component 4; TDLAS measurement component 5; Signal generator 51; Laser driver 52; Laser diode 53; Laser aiming device 54; First photodetector 55; Second photodetector 56; Data acquisition processor 57; Needle valves 61-66; Sealed container 7. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] The following description, with reference to the accompanying drawings, describes a system for measuring gas leakage and material barrier properties within a transparent, sealed container according to an embodiment of the present invention.

[0024] like Figure 1 As shown, the gas leakage and material barrier properties measurement system 100 in a transparent sealed container according to an embodiment of the present invention includes a test chamber 1, a first adjustment component 2, a gas distribution component 3, a second adjustment component 4, and a TDLAS measurement component 5.

[0025] Test chamber 1 has a sealed cavity for holding a sealed container 7. Specifically, as shown... Figure 1As shown, the test chamber 1 is a rectangular box, and the inner circumference of the test chamber 1 defines a rectangular sealed cavity. The sealed container 7 to be tested (e.g., a transparent glass medicine bottle) is placed inside the sealed cavity.

[0026] The first regulating component 2 is connected to the sealed cavity, and is used to regulate the temperature, humidity, and pressure within the sealed cavity. Specifically, as shown... Figure 1 As shown, the first adjustment component 2 is connected to the sealed cavity. The temperature, humidity and pressure inside the sealed cavity are adjusted by the first adjustment component 2, so that the sealed container 7 is in the environment of the required temperature, humidity and pressure for the test.

[0027] The gas mixing assembly 3 is connected to the sealed container 7, and the gas mixing assembly 3 is used to mix the target gas and the reference gas and introduce them into the sealed container 7. Specifically, as shown... Figure 1 As shown, the gas distribution assembly 3 can introduce the proportioned target gas and reference gas into the sealed container 7.

[0028] The second regulating component 4 is located between the gas distribution component 3 and the sealed container 7. The second regulating component 4 is adapted to communicate with the sealed container 7 and is used to regulate the pressure inside the sealed container 7. Specifically, as shown... Figure 1 As shown, the second adjustment component 4 is connected to the sealed container 7, thereby adjusting the pressure inside the sealed container 7 to achieve the pressure environment required for the pressure test inside the sealed container 7.

[0029] The TDLAS measurement component 5 is mounted on the test chamber 1 and communicates with the sealed cavity. The TDLAS measurement component 5 is used to test the target gas concentration in the sealed container 7 in order to detect the leakage rate in the sealed container 7. The measurement system 100 has a first state and a second state. In the first state, the first adjustment component 2 is turned on to adjust the temperature, humidity and pressure in the sealed cavity, and the gas distribution component 3 is turned on to fill the sealed container 7 with gas. In the second state, the TDLAS measurement component 5 is turned on to detect the change in the concentration of the target gas in the sealed container 7, and the first adjustment component 2 adjusts one of the parameters of the temperature, humidity and pressure in the sealed cavity.

[0030] Specifically, such as Figure 1As shown, the TDLAS measurement component 5 is located on one side of the test chamber 1. The detection end of the TDLAS measurement component 5 extends into the sealed cavity and is positioned opposite to the sealed container 7. The TDLAS measurement component 5 measures the concentration change of the target gas in the sealed container 7 to detect the leakage and barrier characteristics of the sealed container 7. The first state is the preparation state. The first adjustment component 2 is turned on to adjust the temperature, humidity and pressure in the sealed cavity to preset values. At the same time, the gas distribution component 3 fills the sealed container 7 with gas, so that the target gas and the reference gas are introduced into the sealed container 7. The second state is the measurement state. First, the TDLAS measurement component 5 is turned on to detect the concentration change of the target gas in the sealed container 7. Then, the temperature in the sealed cavity is adjusted by the first adjustment component 2, or the humidity in the sealed cavity is adjusted by the first adjustment component 2, or the pressure in the sealed cavity is adjusted by the first adjustment component 2, so as to study the effect of temperature, humidity and pressure on the leakage and barrier characteristics of the sealed container 7.

[0031] The gas leakage and material barrier characteristics measurement system 100 in a transparent sealed container according to this utility model embodiment includes a test chamber 1, a first adjustment component 2, a gas distribution component 3, a second adjustment component 4, and a TDLAS measurement component 5. The temperature, humidity, and pressure inside the test chamber 1, as well as the pressure of the sealed container 7, are adjusted by the first adjustment component 2 and the second adjustment component 4. The sealed container 7 is inflated by the gas distribution component 3. This allows for the study of different transparent sealing materials under different gas, temperature, humidity, and pressure conditions, analyzing the leakage rate of different transparent sealing materials under micro-holes and the barrier characteristics of different transparent sealing materials. The TDLAS technology is used to simultaneously measure the change trend of different gas concentrations over time before and after the experiment, quantitatively studying the long-term barrier characteristics of different materials against different gases. This achieves non-destructive testing of gas concentration inside the sealed container 7. Compared with related technologies, the test results are accurate, do not require human operation or judgment, and have high testing efficiency.

[0032] In some embodiments, the gas distribution assembly 3 includes a first storage bottle 31, a second storage bottle 32, and a filter element 33.

[0033] The first storage bottle 31 is used to store the target gas, and the second storage bottle 32 is used to store the reference gas. Specifically, as shown... Figure 1 As shown, the first gas storage cylinder is a high-pressure gas storage cylinder and stores the target gas, while the second storage cylinder 32 is a high-pressure gas storage cylinder and stores a reference gas (e.g., nitrogen).

[0034] In some embodiments, one end of the filter element 33 is connected to the first storage bottle 31 and the second storage bottle 32 respectively, so that the target gas and the reference gas flow into the filter element 33. The filter element 33 is used to filter impurities and moisture in the target gas and the reference gas. The other end of the filter element 33 is connected to the sealed container 7, so that the target gas and the reference gas filtered by the filter element 33 flow into the sealed container 7. Specifically, as Figure 1 As shown, the filter element 33 is a filter cartridge. The inlet of the filter element 33 is connected to the outlet of the first storage bottle 31 and the outlet of the second storage bottle 32. The reference gas and the target gas flow into the filter element 33 and filter the moisture and impurities in the reference gas and the target gas through the filter element 33. The outlet of the filter element 33 is connected to the sealed container 7 and the filtered reference gas and target gas flow into the sealed container 7.

[0035] In some embodiments, the gas distribution assembly 3 further includes a first mass flow meter 34 and a second mass flow meter 35.

[0036] The first mass flow meter 34 is connected at both ends to the first storage bottle 31 and the filter element 33, respectively. The first mass flow meter 34 is used to control the flow rate of the target gas flowing out of the first storage bottle 31. Specifically, as shown... Figure 1 As shown, the inlet of the first mass flow meter 34 is connected to the first storage bottle 31, and the outlet of the first mass flow meter 34 is connected to the inlet of the filter element 33. Thus, the flow rate of the target gas is accurately controlled and measured through the first mass flow meter 34 to ensure the accurate concentration of the gas after mixing.

[0037] In some embodiments, the two ends of the second mass flow meter 35 are respectively connected to the second storage bottle 32 and the filter element 33, and the second mass flow meter 35 is used to control the flow rate of the reference gas flowing out of the second storage bottle 32. Specifically, as Figure 1 As shown, the inlet of the second mass flow meter 35 is connected to the second storage bottle 32, and the outlet of the second mass flow meter 35 is connected to the inlet of the filter element 33. Thus, the flow rate of the target gas is accurately controlled and measured through the second mass flow meter 35 to ensure the accurate concentration of the mixed gas.

[0038] In some embodiments, the first adjustment component 2 includes a detection element 21, a constant temperature and humidity element 22, an inflation element 23, and a vacuum element 24.

[0039] The detection element 21 is located inside the sealed cavity and is used to detect the temperature, humidity, and pressure within the sealed cavity. Specifically, for example... Figure 1 As shown, the detection element 21 is installed inside the sealed cavity to detect the temperature, humidity and pressure inside the sealed cavity. When any of the temperature, humidity and pressure inside the sealed cavity deviates from the preset value, an alert can be issued to the tester.

[0040] A temperature and humidity control element 22 is installed inside the sealed cavity, and is used to control the temperature and humidity inside the sealed cavity to remain constant. Specifically, for example... Figure 1 As shown, the constant temperature and humidity component 22 is a constant temperature and humidity system and is located inside the sealed cavity. When the detection component 21 detects that the temperature and humidity inside the sealed cavity deviate from the preset value, the constant temperature and humidity component 22 is activated to maintain the temperature and humidity inside the sealed cavity within the preset value range, so as to ensure the accuracy of the experimental results.

[0041] Both the inflation component 23 and the vacuum component 24 are connected to the sealing cavity. The inflation component 23 is used to inject a reference gas into the sealing cavity to increase the pressure inside the sealing cavity, and the vacuum component 24 is used to extract the gas from the sealing cavity to reduce the pressure inside the sealing cavity. Specifically, as shown... Figure 1 As shown, both the inflation component 23 and the vacuum component 24 are located outside the test chamber 1 and are connected to the sealing cavity. When the detection component 21 detects that the pressure inside the sealing cavity is higher than the preset value, the vacuum component 24 is opened to reduce the pressure inside the sealing cavity. When the detection component 21 detects that the pressure inside the sealing cavity is lower than the preset value, the inflation component 23 is opened to inflate the sealing cavity to increase the pressure inside the sealing cavity.

[0042] In some embodiments, the inflation component 23 includes a third gas storage cylinder for storing a reference gas and communicating with the sealed cavity to allow the reference gas to be introduced into the sealed cavity. Specifically, as Figure 1 As shown, the third gas cylinder is a high-pressure gas cylinder and stores reference gas. When the pressure inside the sealed cavity is too low, the third gas cylinder can be opened to fill the sealed cavity with gas to increase the pressure inside the sealed cavity.

[0043] In some embodiments, the measurement system 100 has a first state and a second state. In the first state, the third gas cylinder is in communication with the sealed cavity and the sealed cavity is closed, so that the reference gas in the third gas cylinder is introduced into the sealed cavity to increase the pressure in the sealed cavity. In the second state, the third gas cylinder is in communication with the sealed cavity and the sealed cavity is in communication with the outside, so that the reference gas in the third gas cylinder is introduced into the sealed cavity to purge the sealed cavity. Specifically, as shown... Figure 1 As shown, the outlet of the third gas cylinder is connected to the inlet of the sealed cavity. The first state is the pressurization state, and the second state is the purging state. In the first state, the sealed cavity is closed, and the third gas cylinder is opened to introduce reference gas into the sealed cavity, increasing the pressure inside. In the second state, the sealed cavity can be connected to the external environment through a connecting pipe. After the experiment, the third gas cylinder can introduce reference gas into the sealed cavity to purge the residual gas outside, removing any residual gas or contaminants and restoring the sealed cavity to its initial state. This ensures a clean environment within the sealed cavity and avoids the influence of residual gas from the previous experiment on the new experiment, thus guaranteeing the accuracy of the experimental results.

[0044] In some embodiments, both the second regulating component 4 and the vacuum component 24 are vacuum pumps. Therefore, by selecting a vacuum pump, a vacuum can be quickly created, the pressure within the sealed cavity can be precisely controlled, and the stability and consistency of experimental conditions can be ensured.

[0045] In some embodiments, the detection element 21 includes a sensor 211, which is disposed on the outer periphery of the test chamber 1 and communicates with the sealed cavity. The sensor 211 is used to detect the temperature and humidity inside the sealed cavity, so that when either the temperature or humidity inside the sealed cavity deviates from a preset value, the temperature and humidity control element 22 is activated. Specifically, as shown... Figure 1 As shown, the detection element 21 is a temperature / humidity sensor 211, which is set on the outer periphery of the test chamber 1 and the detection end of the detection element 21 is connected to the sealed cavity. The temperature and humidity inside the test chamber 1 are detected by the detection element 21.

[0046] In some embodiments, the detection element 21 further includes a pressure gauge 212, which is disposed on the outer periphery of the test chamber 1 and communicates with the sealed cavity. The pressure gauge is used to detect the pressure inside the sealed cavity so that when the pressure inside the sealed cavity deviates from a preset value, one of the inflation element 23 and the vacuum element 24 is activated. Specifically, as shown... Figure 1 As shown, the detection element 21 is set outside the test chamber 1 and the detection end of the detection element 21 extends into the sealed cavity. The pressure inside the sealed cavity is detected by the detection element 21. When the pressure detected by the detection element 21 is too high, the vacuum element 24 is opened to reduce the pressure inside the sealed cavity. When the pressure detected by the detection element 21 is too low, the inflation element 23 is opened to increase the pressure inside the sealed cavity.

[0047] In some embodiments, the TDLAS measurement component 5 includes a signal generator 51, a laser driver 52, a laser diode 53, a laser aiming device 54, a first photodetector 55, a second photodetector 56, and a data acquisition processor 57.

[0048] Signal generator 51 is used to transmit a low-frequency triangular wave superimposed with a high-frequency sine wave. Specifically, as shown... Figure 1 As shown, the signal generator 51 is located on the left side of the test box 1. The signal generator 51 is used to transmit a low-frequency triangular wave superimposed with a high-frequency sine wave.

[0049] The laser driver 52 is connected to both the signal generator 51 and the laser diode 53, so that the laser driver 52 receives the sine wave from the signal generator 51 to drive the laser diode 53 to generate a modulated laser signal. Specifically, as shown... Figure 1 As shown, the laser driver 52 and the laser diode 53 are both located between the signal generator 51 and the test box 1. The laser driver 52 is connected to the signal generator 51 and the laser diode 53 respectively, so that the laser driver 52 receives the sine wave from the signal generator 51 and drives the laser diode 53 to generate a modulated laser signal.

[0050] The laser aiming device 54 is located on the side of the laser diode 53 furthest from the laser driver 52 and is positioned opposite to the laser diode 53. The laser signal generated by the laser diode 53 is split into a first beam and a second beam by the laser aiming device 54. Specifically, as shown... Figure 1 As shown, the laser aiming device 54 includes a first laser aiming device 54 and a second laser aiming device 54, which respectively divide the laser signal generated by the laser diode 53 into a first beam and a second beam.

[0051] The first photodetector 55 is disposed inside the sealed cavity and positioned opposite to the first beam, so that the first beam passes through the sealed container 7 and into the first photodetector 55. The second photodetector 56 is disposed outside the test chamber 1 and positioned opposite to the second beam, so that the second beam passes through the second photodetector 56. Specifically, as shown... Figure 1 As shown, the first beam is encased in the sealed cavity and passes through the sealed container 7 into the first photodetector 55, while the second beam is directly encased in the second photodetector 56.

[0052] Both the first photodetector 55 and the second photodetector 56 are connected to the data acquisition processor 57 to analyze the beam data acquired by the first photodetector 55 and the second photodetector 56. Thus, the data acquisition processor 57 analyzes the intensity changes of the first and second beams to perform online gas concentration analysis, achieving high-precision online gas measurement.

[0053] The following is based on Figure 1 The diagram illustrates the working process of the transparent sealed container gas leakage and material barrier properties measurement system 100 according to an embodiment of this utility model.

[0054] The gas leakage and material barrier properties measurement system 100 in a transparent sealed container includes a test chamber 1, a first adjustment component 2, a gas distribution component 3, a second adjustment component 4, and a TDLAS measurement component 5.

[0055] The first storage bottle 31 and the second storage bottle 32 are mixed by the first mass flow meter 34 and the second mass flow meter 35, and then filtered through the high-precision filter 33 to obtain pure, dry gases of different concentrations. Needle valves 62, 63, and 66 are opened, and needle valves 61, 64, and 65 are closed, allowing the required gases to enter the transparent sealed container 7. The flow-through gas mixing TDLAS measurement component 5 accurately detects and records data. The test chamber 1 (low and high pressure resistant) is opened, needle valve 65 is connected, and the other needle valves are closed. The test chamber 1 is equipped with a pressure gauge 212 and a temperature / humidity sensor 211, which can monitor the internal pressure and temperature / humidity of the transparent sealed container 7 and the test chamber 1 in real time. Humidity, after opening the needle valve 65, observe the gas concentration change of the high-precision measurement system 100 for a short time. The gas leakage rate, i.e. the orifice size, can be calculated by the volume, concentration change and time of the transparent sealed container 7. (1) The first adjustment component 2 changes the temperature and humidity of the transparent sealed container 7 (different materials can be replaced) 15. (2) The pressure inside the test box 1, i.e. the outside of the transparent sealed container 7, is changed by the inflation component 23 and the vacuum component 24. N2 can also be continuously injected to purge the transparent sealed container 7 to avoid interference between gas measurements. In-depth study of the leakage orifice rate of different materials under different temperatures, different humidity and different pressures of different gases to establish a leakage rate model.

[0056] The first storage bottle 31 and the second storage bottle 32 are mixed by the first mass flow meter 34 and the second mass flow meter 35, and then filtered through the high-precision filter 33 to obtain pure and dry gases of different concentrations. Needle valves 62, 63, and 66 are opened, and needle valves 61, 64, and 65 are closed, allowing the gases to enter the transparent sealed container 7 inside the test chamber 1. Then, all needle valves are closed, and the test chamber 1 is sealed. The test chamber 1 is equipped with a pressure gauge 212 and a temperature / humidity sensor 211, which can monitor the pressure and temperature / humidity inside the transparent sealed container 7 (different materials can be replaced) and the test chamber 1 in real time. After long-term measurement, the TDLAS measurement component 5 records the trend of different gas concentrations changing over time before and after the high-precision measurement experiment. The measurement system 100 can be replaced with different transparent materials (quartz, glass, PET, etc.) to study the material barrier properties. After each measurement, needle valves 61, 63, and 66 can be opened, and needle valves 62, 64, and 65 can be closed for purging to ensure the experimental effect. The system also quantitatively studies the long-term barrier properties of different materials to different gases under different temperatures, humidity and pressures (high and low pressure) on the transparent sealed container 7 through the first adjustment component 2, the inflation component 23 and the vacuum component 24.

[0057] The TDLAS measurement component 5 is driven by a laser driver 52, which emits a low-frequency triangular wave superimposed with a high-frequency sine wave. The laser beam passes through a laser collimator at the front end of a split-beam fiber and enters each sub-optical measurement system 100. The split-beam laser collimator enters an interferometer and a photodetector for spectral calibration. The laser beam from the split-beam laser collimator passes through a transparent sealed container 7 (which can be replaced with different materials) and enters the photodetector. The fiber optic cables and cables of the split-beam laser collimator and the photodetector are sealed and fixed in a sealed gas chamber (resistant to low and high pressure). The sealed gas chamber (resistant to low and high pressure) is equipped with a pressure gauge 212 and a temperature / humidity sensor 211 to monitor relevant data inside. The first photodetector 55 and the second photodetector 56 are connected to a data processor for online gas concentration analysis, realizing high-precision online gas measurement.

[0058] This invention relates to a laboratory-based system 100 for measuring gas leakage and material barrier properties within a transparent, sealed container. Different concentrations of gas (such as CO2 or O2) are mixed using a mass flow meter and introduced into the transparent, sealed container 7 of the test chamber 1. Each mixing uses a single gas of a different concentration. The gas in the test chamber 1 and the transparent, sealed container 7 is non-flowing and pressure-resistant. The sealed chamber contains an optical system including a laser and a detector. The transparent, sealed container 7 is transparent, enabling laser-based measurement and analysis of gas leakage and material barrier properties. Depending on experimental needs, the transparent, sealed container 7 can be made of different materials (quartz, glass, PET, etc.) to analyze changes in gas concentration. This system enables the study of gas barrier properties. A transparent, sealed container 7 can be micro-perforated, and a vacuum can be created in the sealed gas chamber. Gas leakage can be detected by monitoring changes in gas concentration within the transparent, sealed container 7. The gas chamber is connected to a TDLAS high-precision online gas (CO2) measurement system 100, which monitors changes in gas (CO2) concentration within the transparent, sealed container 7 in real time. By changing the temperature, humidity, and pressure of the sealed gas chamber and the transparent, sealed container 7, the study of gas leakage and material barrier properties within the transparent, sealed container 7 can be achieved. This provides a non-intrusive and rapid detection method for assessing the sealing integrity and leakage and material barrier properties of packaging materials used in food, pharmaceuticals, and medical devices.

[0059] Based on the study of the physical and chemical mechanisms of different gases on different food and drug packaging materials, this utility model designs and builds an experimental system for measuring gas leakage and material barrier characteristics in a transparent sealed container 7. At the front end of the system, different concentrations of different gases (CO2 or O2, etc.) are mixed through a mass flow meter and different concentrations of gases are sent into the transparent sealed container 7 of the test chamber 1. The sealed gas chamber is resistant to low / high pressure. The transparent sealed container 7 can be replaced with different materials. (1) Leakage study of sealing integrity: Based on the principle of TDLAS technology, the spectral lines that are strongly absorbed by the target gas and avoid interference from other gases are selected. The short optical path high-precision measurement algorithm is used to measure the gas concentration change in micro-holes of different sizes in the transparent sealed container 7. The relationship between the leakage rate of gas in different micro-hole sizes and factors such as temperature, humidity, and pressure is quantitatively analyzed. A leakage model of different gas concentrations in different micro-hole sizes under different working conditions (temperature, humidity, pressure, etc.) is established to provide a theoretical basis for rapid detection of sealing integrity of food, drugs, medical devices, etc. (2) Research on the barrier properties of transparent materials. The experimental system can simultaneously use high-precision TDLAS technology to measure the concentration of the target gas before and after entering the transparent sealed container 7, obtain the relationship between the concentration and time, quantify the barrier properties of the material by the area enclosed by the two concentration curves, and analyze the barrier properties of the material under different materials, different temperatures and humidity, and different pressures to determine the optimal material and the best set temperature, providing data support for the selection of sealed packaging materials for food, medicine and other products.

[0060] This invention studies the leakage rate of different transparent sealing materials under different gas, temperature, humidity, pressure and other factors under micro-hole conditions. The TDLAS is used to measure the evolution of different gas concentrations over time during the leakage process and to establish a leakage rate model.

[0061] This invention studies the relationship between the barrier properties of transparent materials such as quartz, glass, and PET and influencing factors such as different gas concentrations, temperature, humidity, and pressure. It uses TDLAS technology to simultaneously measure the changing trends of different gas concentrations over time before and after the experiment, and quantitatively studies the long-term barrier properties of different materials against different gases.

[0062] This invention is based on TDLAS (Diverterless Laser Absorption Spectroscopy) technology and employs an ultra-high precision measurement algorithm. The system can achieve extremely low detection limit measurements of different gases within a short optical path. Simultaneously, it can achieve non-destructive leakage detection and material barrier property research in different transparent sealed containers 7 under different temperature, humidity, and pressure conditions, thereby realizing non-destructive detection of gas concentration in sealed containers 7.

[0063] In summary, the gas leakage and material barrier properties measurement system 100 in the transparent sealed container of this utility model has the following advantages:

[0064] 1. Based on laser absorption spectroscopy (TLDAS) technology, a high-precision measurement algorithm is used to achieve the measurement of extremely low concentration gas in a transparent sealed container 7 within an effective short optical path under non-destructive (non-destructive) working conditions;

[0065] 2. The TDLAS-based gas leakage and material barrier characteristics measurement system 100 in transparent sealed containers can be used to study and measure the gas concentration changes in micro-holes of different sizes in transparent sealed containers 7, quantitatively analyze the relationship between gas leakage rate at different micro-hole sizes and factors such as temperature, humidity, and pressure, and establish leakage models of different gas concentrations at different micro-hole sizes under different working conditions (temperature, humidity, pressure, etc.).

[0066] 3. The TDLAS-based transparent sealed container gas leakage and material barrier characteristics measurement system 100 can deeply measure and study the target gas concentration before and after entering the transparent sealed container 7, obtain the concentration change relationship with time, quantify the barrier characteristics of the material by the area enclosed by the two concentration curves, and analyze the material barrier capacity under different materials, different temperatures and humidity, and different pressures to determine the optimal material and the best set temperature.

[0067] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0070] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A system for measuring gas leakage and material barrier properties within a transparent, sealed container, characterized in that, The test box has a sealed cavity for placing a sealed container. A first adjusting assembly is in communication with the sealed cavity, and is used to adjust the temperature, humidity and pressure in the sealed cavity. A gas distribution assembly is in communication with the sealed container, and is used to mix target gas and reference gas and introduce them into the sealed container. A second adjusting assembly is arranged between the gas distribution assembly and the sealed container, and is adapted to communicate with the sealed container to adjust the pressure in the sealed container. A TDLAS measuring assembly is arranged on the test box and in communication with the sealed cavity, and is used to test the target gas concentration of the sealed container to detect the leakage and barrier properties of the sealed container. The gas distribution assembly comprises:

2. The system for measuring gas leakage and material barrier properties of transparent sealed containers according to claim 1, wherein, A first storage bottle for storing target gas and a second storage bottle for storing reference gas; A filter in communication with the first and second storage bottles at one end to allow the target gas and reference gas to flow into the filter, and in communication with the sealed container at the other end to allow the filtered target gas and reference gas to flow into the sealed container. The gas distribution assembly further comprises:

3. The system for measuring gas leakage and material barrier properties of transparent sealed containers according to claim 2, wherein, A first mass flow meter in communication with the first storage bottle and the filter at both ends to control the flow of target gas from the first storage bottle; A second mass flow meter in communication with the second storage bottle and the filter at both ends to control the flow of reference gas from the second storage bottle. The first adjusting assembly comprises:

4. The system for measuring gas leakage and material barrier properties of transparent sealed containers according to claim 1, wherein, A detection element arranged in the sealed cavity to detect the temperature, humidity and pressure in the sealed cavity; A constant temperature and humidity element arranged in the sealed cavity to control the temperature and humidity in the sealed cavity to be constant; An inflation element and a vacuum element, both in communication with the sealed cavity, the inflation element being used to inflate the sealed cavity with reference gas to increase the pressure in the sealed cavity, and the vacuum element being used to extract the gas in the sealed cavity to decrease the pressure in the sealed cavity. ​ 5. The system for measuring gas leakage and material barrier properties of transparent sealed containers according to claim 4, wherein, The inflator comprises a third gas cylinder for storing reference gas and communicating with the sealed cavity so as to introduce the reference gas into the sealed cavity.

6. The system for measuring gas leakage and material barrier properties of transparent sealed containers according to claim 5, wherein, The measuring system has a first state and a second state, in the first state, the third gas cylinder communicates with the sealed cavity and the sealed cavity is closed so that the reference gas in the third gas cylinder is introduced into the sealed cavity to increase the pressure in the sealed cavity, in the second state, the third gas cylinder communicates with the sealed cavity and the sealed cavity communicates with the outside so that the reference gas in the third gas cylinder is introduced into the sealed cavity to purge the sealed cavity.

7. The system for measuring gas leakage and material barrier properties of transparent sealed containers according to claim 4, wherein The second adjusting assembly and the vacuum device are both vacuum pumps.

8. The system for measuring gas leakage and material barrier properties of transparent sealed containers according to claim 4, wherein, The detecting device comprises a sensor arranged on the outer circumferential side of the test box and communicating with the sealed cavity, the sensor is used to detect the temperature and humidity in the sealed cavity, so that the constant temperature and humidity device is started when one of the temperature and humidity in the sealed cavity deviates from the preset value.

9. The system for measuring gas leakage and material barrier properties of transparent sealed containers according to claim 4, wherein, The detecting device further comprises a pressure gauge arranged on the outer circumferential side of the test box and communicating with the sealed cavity, the pressure gauge is used to detect the pressure in the sealed cavity, so that one of the inflator and the vacuum device is started when the pressure in the sealed cavity deviates from the preset value.

10. The system for measuring gas leakage and material barrier properties of transparent sealed containers according to claim 1, wherein, The TDLAS measuring assembly comprises: A signal generator for emitting a low-frequency triangular wave superimposed with a high-frequency sine wave; A laser driver and a laser diode, the laser driver is connected with the signal generator and the laser diode respectively, so that the laser driver receives the sine wave of the signal generator to drive the laser diode to generate a modulated laser signal; A laser sight arranged on the side of the laser diode away from the laser driver and opposite to the laser diode, the laser signal generated by the laser diode is divided into a first light beam and a second light beam through the laser sight respectively; A first photodetector arranged in the sealed cavity and opposite to the first light beam, so that the first light beam passes through the sealed container and is arranged in the first photodetector, and a second photodetector arranged outside the test box and opposite to the second light beam, so that the second light beam is arranged in the second photodetector; A data acquisition processor, the first photodetector and the second photodetector are connected with the data acquisition processor, so as to analyze the light beam data collected by the first photodetector and the second photodetector.

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