Detection device of oxygen permeability detector

Abstract

The utility model discloses an oxygen permeability detector detection device which comprises a lower pressing ring and an upper pressing ring, the lower pressing ring and the upper pressing ring are both used for being placed inside an oxygen permeability detector, an annular sinking table is arranged in the center area of the upper portion of the lower pressing ring, and the annular sinking table is used for supporting and placing a standard film. The upper pressing ring can be detachably installed in the annular sinking table so that the standard film can be pressed between the upper pressing ring and the lower pressing ring. A first detection module extending towards the inner side is arranged at the bottom of the lower pressing ring, a second detection module extending inwards is arranged on the upper pressing ring, and the first detection module and the second detection module are both used for detecting temperature and air pressure values. The device has the beneficial effects that the oxygen permeability of the standard film is independently detected through the first detection module and the second detection module and is compared with data detected by the oxygen permeability detector, so that the precision of the oxygen permeability detector can be more accurately detected.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen transmission rate detection, in particular to a detection device for an oxygen transmission rate detector. Background Technique

[0002] Oxygen transmission rate detectors are mainly used for testing the oxygen transmission performance of films, sheets, papers, packages and related materials in the fields of food, medicine, medical devices, daily chemicals, photovoltaic electronics, etc., providing wide-range and high-efficiency oxygen transmission rate detection for high, medium and low oxygen barrier materials.

[0003] The detector mainly includes two upper and lower chambers. The film is fixed in the middle of the two chambers. High-purity oxygen flows in the upper chamber of the film, and high-purity nitrogen flows in the lower chamber of the film. Oxygen molecules diffuse through the film to the nitrogen on the other side and are carried by the flowing nitrogen to the sensor. By analyzing the oxygen concentration measured by the sensor, the oxygen transmission rate is calculated.

[0004] Before such measuring instruments are put on the market, quality inspection and calibration are required to ensure that the measurement accuracy of the measuring instrument meets the national standards. However, the current quality inspection methods mostly use a calibrated standard film to detect the oxygen permeability, and the accuracy of the instrument is analyzed through the detection data. However, this method has certain contingency and the detection data is not persuasive. Content of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a detection device for an oxygen transmission rate detector, which can be based on a standard film and use a data comparison method to calibrate the accuracy of the detector, with better reliability.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A detection device for an oxygen transmission rate detector, characterized in that: it includes a lower pressing ring and an upper pressing ring. Both the lower pressing ring and the upper pressing ring are used to be placed inside the oxygen transmission rate detector. An annular sunk platform is provided in the central area of the upper part of the lower pressing ring, and the annular sunk platform is used to support and place the standard film. The upper pressing ring is detachably installed in the annular sunk platform so that the standard film is pressed between the upper pressing ring and the lower pressing ring; a first detection module extending inward is provided at the bottom of the lower pressing ring, and a second detection module extending inward is provided on the upper pressing ring. Both the first detection module and the second detection module are used to detect temperature and air pressure values.

[0008] With the above structure, by means of the provided first detection module and second detection module, the air pressure value and temperature before and after the standard film penetrates the membrane can be detected respectively. Then, by comparing with the data detected by the detection device of the oxygen permeability detector itself, the detection accuracy of the oxygen permeability detector can be detected and calibrated.

[0009] Preferably, one end of the lower pressing ring is provided with an outwardly protruding extension platform along the radial direction, and a data acquisition module is embedded in the extension platform. The first detection module and the second detection module both internally have a temperature sensor and a pressure sensor, and each temperature sensor and pressure sensor is electrically connected to the data acquisition module. With the above structure, the temperature and air pressure values detected by the first detection module and the second detection module can be collected.

[0010] Preferably, the data acquisition module internally has a wireless receiving element. With the above structure, the collected data can be transmitted to an external mobile terminal for digital display.

[0011] Preferably, the upper pressing ring has a central through hole, and an inwardly protruding extension platform is provided on the side wall of the central through hole. The temperature sensor and pressure sensor of the second detection module are both installed on the extension platform; two conductance rods are provided on the outer side of the upper pressing ring at positions corresponding to the extension platform, and both conductance rods extend outward. The inner ends of the conductance rods are electrically connected to the temperature sensor and pressure sensor of the second detection module; two strip-shaped through grooves are formed between the annular sunk platform and the data acquisition module, and the two conductance rods can be correspondingly installed in the two strip-shaped through grooves respectively, so that the conductance rods can be electrically connected to the data acquisition module. With the above structure, while not increasing the overall thickness of the detection device, it can ensure that the detection data can be transmitted to the data acquisition module.

[0012] Preferably, the strip-shaped through groove is a rectangular groove, and a conductive component is embedded inside it. The conductive component has a bottom plate and elastic pieces extending upward from both sides of the bottom plate. An inwardly protruding arc-shaped structure is provided on the upper part of the elastic piece; one end of the conductive component is electrically connected to the data acquisition module, and the conductance rod can be clamped between the two elastic pieces of the conductive component. With the above structure, it can ensure that the conductance rod is clamped more firmly, and at the same time, it can also assist in the electrical connection between the second detection module and the data acquisition module.

[0013] Preferably, a wiring groove is provided at the bottom of the lower pressing ring. One end of the wiring groove extends to the installation groove position, and the other end extends to the position of the first detection module. Wires are arranged in the wiring groove, and the wires are connected between the first detection module and the data acquisition module. With the above structure, it is convenient for the first detection module and the data acquisition module to be electrically connected, and at the same time, it will not additionally increase the overall thickness of the detection device.

[0014] Preferably, two first detection modules are symmetrically arranged at the bottom of the pressing ring, and the sensing parts of the two first detection modules and the second detection module are all arranged upward. With the above structure, the oxygen transmission rate of the standard film can be detected more accurately.

[0015] Preferably, an installation groove is provided on the upper surface of the expansion table, the data acquisition module is arranged inside the installation groove, and the strip-shaped through groove communicates the installation groove with the annular sunk platform. With the above structure, while ensuring the installation of the data acquisition module, the overall thickness of the detection device will not be increased additionally.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. By using the detection device of the oxygen transmission rate detector provided by the present utility model, after placing the detection device on the oxygen transmission rate detector to be calibrated, through the setting of the first detection module and the second detection module, the detection device can independently collect the oxygen transmission rate data of the standard film. At the same time, the oxygen transmission rate detector itself is also collecting the oxygen transmission rate data of the standard film. Based on this, by comparing the data collected by the detection device with the data collected by the detector itself, the detection accuracy of the oxygen transmission rate detector can be accurately calibrated and detected.

[0018] 2. The upper pressing ring and the data acquisition module are both installed in the lower pressing ring in an embedded form, ensuring that the thickness of the entire detection device will not be too thick, and thus not affecting the actual measurement accuracy of the detection device when placed in the oxygen transmission rate detector. Description of the Drawings

[0019] Figure 1 It is an exploded structural schematic diagram of the detection device of the oxygen transmission rate detector;

[0020] Figure 2 It is a structural schematic diagram of the lower pressing ring 1;

[0021] Figure 3 It is a bottom view schematic diagram of the lower pressing ring 1;

[0022] Figure 4 It is an assembly structural schematic diagram of the upper pressing ring 2 and the conductive component 7;

[0023] Figure 5 It is a cross-sectional schematic diagram of the detection device of the oxygen transmission rate detector in actual use;

[0024] Figure 6 It is a flow block diagram of the detection method of the detection device of the oxygen transmission rate detector. Detailed Embodiments

[0025] The present utility model will be further described below in conjunction with embodiments and drawings.

[0026] Example 1:

[0027] As Figure 1 shown, an oxygen transmission rate detector testing device includes a lower pressing ring 1 and an upper pressing ring 2. Both the lower pressing ring 1 and the upper pressing ring 2 are used to be placed inside an oxygen transmission rate detector 8. An annular sunk platform 1a is formed in the upper central area of the lower pressing ring 1. The annular sunk platform 1a is used to support and place a standard film 3. The upper pressing ring 2 can be detachably installed in the annular sunk platform 1a, so that the standard film 3 is pressed between the upper pressing ring 2 and the lower pressing ring 1. A first detection module 4 extending towards the inner side of the lower pressing ring 1 is also installed at the bottom of the lower pressing ring 1. A second detection module 5 extending towards the inner side of the upper pressing ring 2 is installed on the upper pressing ring 2. And both the first detection module 4 and the second detection module 5 can be used to detect temperature and air pressure values.

[0028] With such a design, after placing the testing device in the oxygen transmission rate detector 8 to be calibrated, by setting the first detection module 4 and the second detection module 5, the testing device can independently collect the oxygen transmission rate data of the standard film 3. At the same time, the oxygen transmission rate detector 8 itself is also collecting the oxygen transmission rate data of the standard film 3. Based on this, by comparing the data collected by the testing device with the data collected by the oxygen transmission rate detector 8 itself, the detection accuracy of the oxygen transmission rate detector 8 can be accurately calibrated and detected.

[0029] As Figure 2 shown, one end of the lower pressing ring 1 is formed with an outwardly protruding extension platform 1e. A data acquisition module 6 is embedded in the upper surface of the extension platform 1e. Both the first detection module 4 and the second detection module 5 are provided with a temperature sensor 9 and a pressure sensor 10. Each temperature sensor 9 and pressure sensor 10 is electrically connected to the data acquisition module 6. And a wireless receiving element is also provided inside the data acquisition module 6. In this way, it can be ensured that the data detected by the first detection module 4 and the second detection module 5 can be transmitted to a mobile terminal through the data acquisition module 6 and digitally displayed through the mobile terminal.

[0030] In this embodiment, an installation groove 1d is formed in the upper surface of the extension platform 1e. The data acquisition module 6 is embedded in the installation groove 1d. Similarly, after the data acquisition module 6 is embedded in the installation groove 1d, the upper surface of the data acquisition module 6 can be flush with the upper surface of the lower pressing ring 1. In this way, it is ensured that the overall thickness of the entire testing device will not be too thick, and thus it will not affect the normal use of the oxygen transmission rate detector 8.

[0031] As Figure 4As shown in the figure, the upper pressing ring 2 has a central through-hole, and an extending platform 2b protruding in a pinching shape is formed on the side wall of the central through-hole. The temperature sensor 9 and the air pressure sensor 10 of the second detection module 5 are both formed inside the extending platform 2b, so as to avoid increasing the overall thickness of the detection device. At the position corresponding to the extending platform 2b on the outer side of the upper pressing ring 2, two conductance rods 2a are provided. The two conductance rods 2a both extend outwards, and the inner ends of the conductance rods 2a are electrically connected to the temperature sensor 9 and the air pressure sensor 10 of the second detection module 5. In this embodiment, two strip-shaped through-channels 1b are formed between the annular sunk platform 1a and the installation groove 1d, and the two conductance rods 2a can be correspondingly installed in the two groups of strip-shaped through-channels 1b respectively, so that the conductance rods 2a can be electrically connected to the data acquisition module 6.

[0032] Specifically, as Figure 2 shown, the strip-shaped through-channel 1b is a rectangular groove, and a conductive component 7 is embedded inside the strip-shaped through-channel 1b. In this embodiment, the conductive component 7 includes a bottom plate 7a and elastic pieces 7b extending upwards from both sides of the bottom plate 7a. An arc-shaped structure protruding inwards is formed on the upper part of the elastic piece 7b. One end of the conductive component 7 is electrically connected to the data acquisition module 6. In this way, only by clamping the conductance rod 2a between the two groups of elastic pieces 7b of the conductive component 7 can the electrical connection between the second detection module 5 and the data acquisition module 6 be realized, and the conductive component 7 can also ensure that the conductance rod 2a is clamped more firmly.

[0033] Furthermore, as Figure 3 shown, a wiring groove 1c is formed at the bottom of the lower pressing ring 1. One end of the wiring groove 1c extends to the position of the installation groove 1d, and the other end extends to the position of the first detection module 4. Wires are arranged in the wiring groove 1c, and the wires are connected between the first detection module 4 and the data acquisition module 6 to ensure the electrical connection between the first detection module 4 and the data acquisition module 6.

[0034] Further, as Figure 1 and Figure 5 shown, two first detection modules 4 are symmetrically arranged at the bottom of the lower pressing ring 1. The accuracy of the detection data can be further ensured by the two first detection modules 4. And in this embodiment, the sensing parts of the two first detection modules 4 and the second detection module 5 are all arranged upwards. The oxygen transmission rate detector 8 is mainly composed of a base 8a and an end cover 8b. A lower chamber 8a1 is formed at the middle position of the top of the base 8a, and an upper chamber 8b1 is formed at the middle position of the bottom of the end cover 8b. During the actual use of the oxygen transmission rate detector 8, high-purity oxygen is introduced into the upper chamber 8b1, and high-purity nitrogen is introduced into the lower chamber 8a1. Oxygen passes through the film to be detected and enters the lower chamber 8a1. The detection module inside the lower chamber 8a1 detects the oxygen content in the flowing nitrogen to measure the oxygen transmission rate of the film. And the sensing parts of the first detection module 4 and the second detection module 5 being arranged upwards is more convenient for detection and ensures the accuracy of the detection data.

[0035] Example 2:

[0036] As Figure 6 shown, a detection method implemented based on the detection device of the oxygen transmission rate detector introduced in Example 1 includes the following steps:

[0037] Step 1: Place the standard film 3 inside the annular sunk platform 1a, and cover it with the upper pressing ring 2 to ensure that the conductance rod 2a is clamped inside the conductive component 7.

[0038] Step 2: Place the assembled detection device in Step 1 on the base 8a of the oxygen transmission rate detector 8, and ensure that the first detection module 4, the second detection module 5, and the standard film 3 are directly above the lower chamber 8a1. Cover the end cover 8b to ensure that the lower chamber 8a1 and the upper chamber 8b1 are arranged opposite to each other.

[0039] Step 3: Set the initial temperature of the oxygen transmission rate detector 8, introduce high-purity oxygen into the upper chamber 8b1, and introduce high-purity nitrogen into the lower chamber 8a1. In this embodiment, the initial temperature is preferably 23 °C.

[0040] Step 4: Then regularly and intermittently record the data detected by the first detection module 4 and the second detection module 5. In this embodiment, after the temperature of the oxygen transmission rate detector 8 is stable, continuously measure for 60 min, and record a data every 10 min.

[0041] Step 5: Finally, convert the data recorded in Step 4 into calibration data and compare it with the data detected by the oxygen transmission rate detector 8 itself, ultimately achieving the purpose of detecting the accuracy of the oxygen transmission rate detector 8.

[0042] In this embodiment, the calibration data described in Step 5 specifically includes four items: the indication error of the temperature setting value, the temperature stability, the indication error of the transmission rate, and the indication repeatability of the transmission rate. Among them, the indication error of the temperature setting value is converted by the following formula:

[0043]

[0044] In the formula, Δt is the temperature setting value error, with the unit of °C, is the average value of the temperature measurement, with the unit of °C, and t0 is the set temperature value, with the unit of °C.

[0045] The temperature stability is converted by the following formula:

[0046]

[0047] In the formula, Δt’ is the temperature stability, with the unit of %, t max is the maximum value of the temperature measurement, with the unit of °C, tmin is the minimum value of temperature measurement, in °C, is the average value of temperature measurement, in °C.

[0048] For the indication error of the transmittance, the oxygen permeability detector 8 needs to be turned on, and the assembled detection device in the first step is placed in the upper chamber 8b1 and the lower chamber 8a1 respectively for three separate detections, and the conversion is carried out through the following formula:

[0049]

[0050] where δ is the indication error, in cm 3 / (m 2 ·24h), is the average value of the three measurements, in cm 3 / (m 2 ·24h), is the standard value of the standard film 3, in cm 3 / (m 2 ·24h).

[0051] For the repeatability of the transmittance indication, based on the measurement method of the transmittance indication error, the conversion is carried out through the following formula:

[0052]

[0053] where s is the repeatability of oxygen permeability measurement, is the maximum value of the transmittance value in the measurement, in cm 3 / (m 2 ·24h), is the minimum value of the transmittance value in the measurement, in cm 3 / (m 2 ·24h), is the average value of the measurement, in cm 3 / (m 2 ·24h).

[0054] Based on the above method, by setting the first detection module 4 and the second detection module 5 to separately measure the indication error of the temperature setting value, temperature stability, transmittance indication error, and transmittance indication repeatability of the standard film 3, it can form a sharp contrast with the data detected by the oxygen permeability detector 8 itself, and then facilitate the detection of the accuracy of the oxygen permeability detector 8.

[0055] Finally, it should be noted that the above description is only the preferred embodiment of the present utility model. Those of ordinary skill in the art can make various similar representations under the inspiration of the present utility model without violating the purpose and claims of the present utility model. Such transformations all fall within the protection scope of the present utility model.

Claims

1. An oxygen transmission rate detector detection device, characterized in that: It includes a lower pressing ring (1) and an upper pressing ring (2). Both the lower pressing ring (1) and the upper pressing ring (2) are used to be placed inside an oxygen transmission rate detector (8). In the central area of the upper part of the lower pressing ring (1), there is an annular sunk platform (1a), and the annular sunk platform (1a) is used to support and place a standard film (3). The upper pressing ring (2) is detachably installed in the annular sunk platform (1a) so that the standard film (3) is pressed between the upper pressing ring (2) and the lower pressing ring (1). At the bottom of the lower pressing ring (1), there is a first detection module (4) extending inwardly. The upper pressing ring (2) is provided with a second detection module (5) extending inwardly. Both the first detection module (4) and the second detection module (5) are used to detect temperature and air pressure values.

2. The oxygen transmission rate detector according to claim 1, wherein: At one end of the lower pressing ring (1), there is an extended platform (1e) protruding radially outward. A data acquisition module (6) is embedded in the extended platform (1e). Both the first detection module (4) and the second detection module (5) are internally provided with a temperature sensor (9) and a pressure sensor (10). Each temperature sensor (9) and pressure sensor (10) is electrically connected to the data acquisition module (6).

3. The oxygen transmission rate detector according to claim 2, wherein: The data acquisition module (6) is internally provided with a wireless receiving element.

4. The oxygen transmission rate detector according to claim 2, wherein: The upper pressing ring (2) has a central through-hole, and on the side wall of the central through-hole, there is an extended platform (2b) protruding inwardly. The temperature sensor (9) and the pressure sensor (10) of the second detection module (5) are both installed on the extended platform (2b). On the outer side of the upper pressing ring (2) at the position corresponding to the extended platform (2b), there are two conductance rods (2a). Both of the two conductance rods (2a) extend outwardly. The inner ends of the conductance rods (2a) are electrically connected to the temperature sensor (9) and the pressure sensor (10) of the second detection module (5). There are two groups of strip-shaped through-grooves (1b) opened between the annular sunk platform (1a) and the data acquisition module (6). The two conductance rods (2a) can be correspondingly installed in the two groups of strip-shaped through-grooves (1b) so that the conductance rods (2a) can be electrically connected to the data acquisition module (6).

5. The oxygen transmission rate detector according to claim 4, wherein: The strip-shaped through-groove (1b) is a rectangular groove, and a conductive component (7) is embedded therein. The conductive component (7) has a bottom plate (7a) and elastic pieces (7b) extending upward from both sides of the bottom plate (7a). The upper part of the elastic piece (7b) is provided with an inwardly protruding arc-shaped structure. One end of the conductive component (7) is electrically connected to the data acquisition module (6), and the conductance rod (2a) can be clamped between the two elastic pieces (7b) of the conductive component (7).

6. The oxygen transmission rate detector according to claim 2, wherein: At the bottom of the lower pressing ring (1), there is a wiring groove (1c). One end of the wiring groove (1c) extends to the position of the installation groove (1d), and the other end extends to the position of the first detection module (4). Wires are arranged in the wiring groove (1c), and the wires are connected between the first detection module (4) and the data acquisition module (6).

7. The oxygen transmission rate detector according to claim 1, wherein: Two first detection modules (4) are symmetrically arranged at the bottom of the lower pressing ring (1), and the sensing parts of the two first detection modules (4) and the second detection module (5) are all arranged upward.

8. The oxygen transmission rate detector according to claim 4, wherein: The upper surface of the extension table (1e) is provided with a mounting groove (1d), the data acquisition module (6) is arranged inside the mounting groove (1d), and the strip-shaped through groove (1b) communicates the mounting groove (1d) with the annular sunk platform (1a).

Images