Low-frequency Impedance Testing Device and Method for a Textile Structure Electrode

Abstract

The present invention relates to a low-frequency impedance testing device and method for a textile structure electrode. The low-frequency impedance testing device for a textile structure electrode includes a test container, a solution storage member, a pressing plate, a first conductive member, a second conductive member, and a low-frequency impedance meter. The present invention provides a low-frequency impedance testing device and method dedicated to detecting a textile structure electrode. The device connects the textile structure electrode to be tested with the low-frequency impedance meter through a conductive member, and uses the pressing plate and the solution storage member to provide a reasonable and stable wet environment for the textile structure electrode to be tested, thereby ensuring high detection accuracy. Moreover, the device and method are convenient and flexible to operate and have good applicability.

Description

Technical Field

[0001] The present invention relates to a low-frequency impedance testing device and method for textile structure electrodes. Background Art

[0002] With the acceleration of the global population aging process, the enhancement of human health awareness, and the rapid development of science and technology, remote health monitoring has gradually become an important trend in medical monitoring. Wearable bioelectric signal measurement electrodes have received increasing attention from researchers, and textile structure electrodes have emerged as the times require.

[0003] A textile structure electrode is a sensor developed by using textile materials through textile processing technology, which has a textile structure and can sense bioelectric signals on the human body surface. Xu Pengjun of Donghua University disclosed detailed information about textile structure electrodes in his doctoral thesis "Analysis of the Mechanical Interaction between Textile Structure Electrodes and Skin and Research on Dynamic Noise for Body Surface Electrocardiogram Monitoring" in 2012. Compared with traditional disposable adhesive electrocardiogram electrodes, textile structure electrodes have the advantages of softness, comfort, breathability, moisture permeability, and can be used in a dry state. Moreover, they will not cause skin allergies, inflammation and other symptoms in patients, and are suitable for health monitoring intelligent clothing.

[0004] As a sensor, a textile structure electrode should meet certain electrical properties to ensure that the electrode can collect human physiological signals. This requires detecting its electrical properties to judge whether the production quality meets the standards. At present, there is no standard and method that can be relied on for the electrical property evaluation of textile structure electrodes. Many studies refer to the standard of disposable measurement electrodes ANSI / AAMI EC 12-2000 to evaluate the electrical aspects of textile structure electrodes. The domestic standard YY / T 0196-2005 "Disposable Electrocardiogram Electrodes" is also modified by adopting the American standard ANSI / AAMI EC 12-2000, and this standard takes impedance as one of the important indicators for evaluating the electrical properties of textile structure electrodes. However, the detection method of the electrode in this standard is not applicable to the impedance value detection of textile structure electrodes.

[0005] Therefore, it is particularly necessary to provide a detection device and method dedicated to the impedance value of textile structure electrodes. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is, in view of the current situation of the prior art, to provide a low-frequency impedance testing device for textile structure electrodes that can provide a reasonable and stable testing environment for textile structure electrodes so as to ensure the detection accuracy.

[0007] The second technical problem to be solved by the present invention is, in view of the current situation of the prior art, to provide a low-frequency impedance testing device for textile structure electrodes that is convenient and flexible to operate.

[0008] The third technical problem to be solved by the present invention is, in view of the current situation of the prior art, to provide a test method for a low-frequency impedance test device using the above textile structure electrode, which can provide a reasonable and stable test environment for the textile structure electrode and is convenient and flexible to operate.

[0009] The technical solution adopted by the present invention to solve the above technical problems is as follows: A low-frequency impedance test device for a textile structure electrode, characterized in that it includes

[0010] A test container having a hollow inner cavity;

[0011] A solution storage member disposed in the inner cavity of the test container for adsorbing a test solution;

[0012] A pressing plate covering above the solution storage member and forming a gap between the upper surface of the solution storage member for clamping the textile structure electrode to be tested therein;

[0013] A first conductive member disposed on the pressing plate and connected to the first textile structure electrode to be tested;

[0014] A second conductive member disposed on the pressing plate and connected to the second textile structure electrode to be tested, the second conductive member being arranged at an interval from the first conductive member; and

[0015] A low-frequency impedance meter disposed outside the test container and having a positive terminal and a negative terminal respectively extending into the inner cavity of the test container, the positive terminal of the low-frequency impedance meter being connected to the first conductive member, and the negative terminal of the low-frequency impedance meter being connected to the second conductive member.

[0016] Preferably, a humidity detection component capable of detecting the humidity of the textile structure electrode to be tested is provided on the pressing plate, and a humidity adjustment structure for finely adjusting the humidity of the textile structure electrode to be tested is further included. Injecting a certain amount of test solution into the solution storage member can provide a humid environment for the textile structure electrode to be tested, but due to the influence of the material of the solution storage member, there will be significant differences in the actual humidity supplied to the textile structure electrode to be tested. Setting the above structure can finely control the humidity of the textile structure electrode to be tested, which is beneficial to improving the detection accuracy.

[0017] Preferably, the humidity detection component includes a solution transfer film and a humidity-sensitive element capable of detecting humidity, the humidity-sensitive element is disposed on the pressing plate, and the solution transfer film is located below the pressing plate. In the detection state, the solution transfer film is attached to the upper surface of the textile structure electrode to be tested. Adopting this structure facilitates real-time detection of the humidity of the textile structure electrode to be tested.

[0018] Preferably, the pressing plate is partially hollow to form a liquid guide cavity, and both ends of the liquid guide cavity extend at least to the proximal end of the textile structure electrode to be measured. An infusion tube for inputting a test solution into the liquid guide cavity is connected to the top of the pressing plate, and liquid outlet holes for the solution in the liquid guide cavity to fall onto or near the textile structure electrode to be measured are formed on the lower wall surface of the pressing plate. With the above structure, it is convenient to inject the test solution into the textile structure electrode to be measured and maintain the required humidity.

[0019] Preferably, the liquid guide tube has a tubular first part and a second part formed into an inverted V-shaped structure. The second part is located at the central part of the liquid guide cavity and is respectively communicated with the liquid guide cavity at both ends. The first end of the first part is connected to the tip of the second part, and the second end of the first part is located outside the test container. This structure can quickly and controllably transport a small amount of test solution to each electrode to be measured, which is beneficial to improving the accuracy of humidity control.

[0020] In each of the above solutions, the first conductive part and the second conductive part have the same structure, and both include a conductive female buckle and a conductive male buckle. The conductive female buckle is arranged on the pressing plate, and a conductive column extending towards the conductive female buckle is arranged on the side of the body of the conductive male buckle. The conductive column passes through the textile structure electrode to be measured and is detachably inserted and connected with the conductive female buckle. With such a structure, it is convenient to electrically connect the textile structure electrode to be measured with the low-frequency impedance meter.

[0021] Preferably, a temperature control component capable of controlling the temperature of the test solution is arranged on the inner wall of the test container. The temperature control component is arranged corresponding to the solution storage part and includes a temperature sensor for detecting the temperature of the test solution and a heater for heating the test solution. With the above structure, it is convenient to control the temperature of the test solution and provide a more suitable test environment for the textile structure electrode to be measured.

[0022] Preferably, a detector capable of detecting the liquid level of the test solution is arranged in the test container, and the detector is arranged at the upper edge of the solution storage part; the upper part of the test container has a solution injection port, and the lower part is provided with a solution discharge port. This structure is convenient for macroscopically controlling the test humidity of the textile structure electrode to be measured.

[0023] Preferably, the solution storage part is made of a hydrophilic material, and the material is selected from sponge, foam, porous elastic material, non-woven fabric.

[0024] A test method for a low-frequency impedance test device using the above-mentioned textile structure electrode is characterized by including the following steps:

[0025] Inject a sodium chloride solution with a mass fraction of 0.9% into the solution storage part, and the injection amount of the sodium chloride solution is 80% - 90% of the volume of the solution storage part;

[0026] Install the first textile structure electrode to be measured on the pressure plate using the first conductive member, install the second textile structure electrode to be measured on the pressure plate using the second conductive member, then cover the pressure plate on the solution storage member, keep the lower surface of the textile structure electrode to be measured in contact with the upper surface of the solution storage member, connect the positive pole of the low-frequency impedance meter to the first conductive member, and connect the negative pole to the second conductive member;

[0027] Maintain the above state and perform a static test.

[0028] Compared with the prior art, the advantages of the present invention are as follows: The present invention provides a low-frequency impedance test device and method dedicated to detecting textile structure electrodes. It connects the textile structure electrode to be measured with the low-frequency impedance meter through a conductive member, and uses a pressure plate and a solution storage member to provide a reasonable and stable wet environment for the textile structure electrode to be measured, thereby ensuring high detection accuracy. Moreover, the device and method are convenient and flexible to operate and have good applicability. Description of the Drawings

[0029] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0030] Figure 2 is Figure 1 a partially enlarged structural view;

[0031] Figure 3 is a schematic structural diagram of the pressure plate in an embodiment of the present invention. Detailed Embodiments

[0032] The following further describes the present invention in detail with reference to the embodiments of the drawings.

[0033] As Figures 1 to 3 shown, the low-frequency impedance test device for the textile structure electrode in this embodiment includes a test container 1, a solution storage member 2, a pressure plate 3, a first conductive member 4, a second conductive member 5, and a low-frequency impedance meter 6.

[0034] As Figure 1 shown, the test container 1 has a hollow inner cavity 11. The solution storage member 2 is arranged at the lower part of the inner cavity 11 of the test container and is used for adsorbing the test solution. The solution storage member 2 is made of a material with good hydrophilicity, and this material is selected from sponge, foam, porous elastic material, and non-woven fabric. The solution storage member 2 has a substantially horizontal upper surface for placing the textile structure electrode M to be measured. A detector 10 capable of detecting the liquid level of the test solution is arranged in the test container 1, and this detector 10 is arranged at the upper edge of the solution storage member 2. The upper part of the test container 1 has a solution injection port 12, and the lower part is provided with a solution discharge port 13. This structure facilitates macroscopically controlling the test humidity of the textile structure electrode M.

[0035] The above pressing plate 3 covers above the solution storage member 2, and a gap 30 capable of clamping the textile structure electrode M to be measured therein is formed between the pressing plate 3 and the upper surface of the solution storage member 2. The first conductive member 4 is provided at the first end of the pressing plate 3 and is connected to the first textile structure electrode M to be measured. The second conductive member 5 is provided at the second end of the pressing plate 3 and is connected to the second textile structure electrode M to be measured. The low-frequency impedance meter 6 is provided outside the test container 1 and has a positive electrode end 61 and a negative electrode end 62 that respectively extend into the inner cavity 11 of the test container 1. The positive electrode end 61 of the low-frequency impedance meter 6 is connected to the first conductive member 4, and the negative electrode end 62 of the low-frequency impedance meter 6 is connected to the second conductive member 5. The first conductive member 4 and the second conductive member 5 in this embodiment have the same structure, and both include a conductive female buckle 41 and a conductive male buckle 42. The conductive female buckle 41 is provided on the pressing plate 3, and a socket 31 that is inserted and connected to the conductive female buckle 41 is formed on the pressing plate 3. A conductive column 421 extending towards the conductive female buckle 42 is provided on the side of the body of the conductive male buckle 42, and the conductive column 421 passes through the textile structure electrode M to be measured and is detachably inserted and connected to the conductive female buckle 42. With such a structure, it is convenient to electrically connect the textile structure electrode M to be measured to the low-frequency impedance meter 6.

[0036] In this embodiment, a humidity detection component 7 capable of detecting the humidity of the textile structure electrode M to be measured is provided on the pressing plate 3, and a humidity adjustment structure 8 capable of finely adjusting the humidity of the textile structure electrode M to be measured is further included. Injecting a certain amount of test solution into the solution storage member 2 can provide a humid environment for the textile structure electrode M to be measured. However, due to the influence of the material of the solution storage member 2, there will be significant differences in the actual humidity supplied to the textile structure electrode M to be measured. Setting the above structure can finely control the humidity of the textile structure electrode M to be measured, which is beneficial to improving the detection accuracy.

[0037] Specifically, the humidity detection component 7 includes a solution transfer film 71 and a humidity-sensitive element 72 capable of detecting humidity. The humidity-sensitive element 72 is provided on the pressing plate 3, and an installation opening 32 for installing the humidity-sensitive element 72 is formed on the pressing plate 3. The solution transfer film 71 can be made of the same material as the solution storage member 2. The solution transfer film 71 is located below the pressing plate 3, and in the detection state, the solution transfer film 71 is attached to the upper surface of the textile structure electrode M to be measured. With such a structure, it is convenient to detect the humidity of the textile structure electrode M to be measured in real time.

[0038] The middle part of the above-mentioned pressing plate 3 is hollow to form a liquid guiding cavity 33. Both ends of the liquid guiding cavity 33 extend to the textile structure electrode M to be measured. A liquid infusion pipe 81 for inputting a test solution into the liquid guiding cavity 33 is connected to the top of the pressing plate 3. An outlet hole 34 for the solution in the liquid guiding cavity 33 to fall onto or near the textile structure electrode M to be measured is formed on the lower wall surface of the pressing plate 3. The outlet hole 34, the liquid guiding cavity 33 and the liquid infusion pipe 81 together constitute a humidity adjustment structure 8, so as to inject the test solution into the textile structure electrode M to be measured and maintain the required humidity. The liquid guiding pipe 81 has a tubular first part 811 and a second part 812 formed into an inverted V-shaped structure. The second part 812 is located at the central part of the liquid guiding cavity 33 and both ends are respectively communicated with the liquid guiding cavity 33. The first end of the first part 811 is connected to the tip of the second part 812, and the second end of the first part 811 is located outside the test container 1. This structure can quickly and controllably transport a small amount of test solution to each electrode to be measured, which is beneficial to improving the accuracy of humidity control.

[0039] In this embodiment, a temperature control component 9 capable of controlling the temperature of the test solution is arranged on the inner wall of the test container 1. The temperature control component 9 is arranged corresponding to the solution storage member 2 and includes a temperature sensor for detecting the temperature of the test solution and a heater capable of heating the test solution. With the above structure, it is convenient to control the temperature of the test solution and provide a more suitable test environment for the textile structure electrode.

[0040] The pressing plate 3 of this embodiment can also be provided with a position detection sensor and a pressure regulator to control the contact force between the textile structure electrode M to be measured and the solution storage member 2. A display screen 30 capable of displaying the detection structures of each component is arranged on the outer wall of the test container 1. The tester can observe the adjustment conditions of humidity and temperature through the display screen 30 and make control according to the actual situation.

[0041] The test method of the low-frequency impedance test device using the above-mentioned textile structure electrode is as follows:

[0042] Inject a sodium chloride solution with a mass fraction of 0.9% into the solution storage member 2 through the injection port 12, and the injection amount of the sodium chloride solution is 80% - 90% of the volume of the solution storage member 2;

[0043] Use the first conductive member 4 to install the first textile structure electrode M to be measured on the first end of the pressing plate 3, use the second conductive member 5 to install the second textile structure electrode M to be measured on the second end of the pressing plate 3, and then cover the pressing plate 3 on the solution storage member 2 so that the lower surface of the textile structure electrode M to be measured is in contact with the upper surface of the solution storage member 2; adjust the humidity and temperature of the test solution through the humidity adjustment structure 8 and the temperature control component 9. After adjusting to the set value, connect the positive pole of the low-frequency impedance meter 6 to the first conductive member 4 and the negative pole to the second conductive member 5;

[0044] Keep the above test container 1 closed and conduct a static test;

[0045] After the test, drain the test solution through the solution outlet 13.

Claims

1. A low-frequency impedance testing device for a textile structure electrode, characterized in that: including a test container having a hollow inner cavity; a temperature control component for controlling the temperature of the test solution is provided on the inner wall of the test container; a solution storage member disposed in the inner cavity of the test container for adsorbing the test solution; a pressing plate covering above the solution storage member and forming a gap for clamping the textile structure electrode to be tested between the upper surface of the solution storage member; a first conductive member disposed on the pressing plate and connected to the first textile structure electrode to be tested; a second conductive member disposed on the pressing plate and connected to the second textile structure electrode to be tested, the second conductive member being arranged at an interval from the first conductive member; the first conductive member and the second conductive member have the same structure; and a low-frequency impedance meter disposed outside the test container and having a positive electrode and a negative electrode respectively extending into the inner cavity of the test container, the positive electrode of the low-frequency impedance meter being connected to the first conductive member, and the negative electrode of the low-frequency impedance meter being connected to the second conductive member.

2. The low-frequency impedance testing device for the textile structure electrode according to claim 1, wherein: a humidity detection component for detecting the humidity of the textile structure electrode to be tested is provided on the pressing plate, and a humidity adjustment structure for finely adjusting the humidity of the textile structure electrode to be tested is further included.

3. The low-frequency impedance testing device for the textile structure electrode according to claim 2, characterized in that: The humidity detection component includes a solution transfer film and a humidity-sensitive element for detecting humidity, the humidity-sensitive element is disposed on the pressing plate, the solution transfer film is located below the pressing plate, and in the detection state, the solution transfer film is attached to the upper surface of the textile structure electrode to be tested.

4. The low-frequency impedance testing device for the textile structure electrode according to claim 2, characterized in that: The pressing plate is partially hollow to form a liquid guide cavity, and both ends of the liquid guide cavity at least extend to the proximal end of the textile structure electrode to be tested. An infusion tube for inputting the test solution into the liquid guide cavity is connected to the top of the pressing plate, and liquid outlet holes for the solution in the liquid guide cavity to fall onto or near the textile structure electrode to be tested are formed on the lower wall surface of the pressing plate.

5. The low-frequency impedance testing device for the textile structure electrode according to claim 4, characterized in that: The infusion tube has a tubular first part and a second part formed in an inverted V-shaped structure. The second part is located at the central part of the liquid guide cavity and both ends are respectively communicated with the liquid guide cavity. The first end of the first part is connected to the tip of the second part, and the second end of the first part is located outside the test container.

6. The low-frequency impedance testing device for the textile structure electrode according to any one of claims 1 to 5, characterized in that: Both the first conductive member and the second conductive member include a conductive female buckle and a conductive male buckle. The conductive female buckle is disposed on the pressing plate. A conductive column extending towards the conductive female buckle is provided on the side of the body of the conductive male buckle, and the conductive column passes through the textile structure electrode to be tested and is detachably inserted and connected with the conductive female buckle.

7. The low-frequency impedance testing device for the textile structure electrode according to any one of claims 1 to 5, characterized in that: The temperature control component is arranged corresponding to the solution storage member and includes a temperature sensor for detecting the temperature of the test solution and a heater for heating the test solution.

8. The low-frequency impedance testing device for the textile structure electrode according to any one of claims 1 to 5, characterized in that: A detector for detecting the liquid level of the test solution is provided in the test container, and the detector is disposed at the upper edge of the solution storage member; the upper part of the test container has a solution injection port, and the lower part is provided with a solution discharge port.

9. The low-frequency impedance testing device for the textile structure electrode according to any one of claims 1 to 5, characterized in that: The solution storage member is made of a hydrophilic material selected from sponge, foam, porous elastic material, and non-woven fabric.

10. A method for testing the low-frequency impedance of a textile-structured electrode, characterized in that: A low-frequency impedance test device for a textile structure electrode according to any one of claims 1 to 9, comprising the following steps: Inject a 0.9% sodium chloride solution into the solution storage member, and the injection amount of the sodium chloride solution is 80% - 90% of the volume of the solution storage member; Mount the first textile structure electrode to be measured on the pressing plate using a first conductive member, mount the second textile structure electrode to be measured on the pressing plate using a second conductive member, then cover the pressing plate on the solution storage member, keep the lower surface of the textile structure electrode to be measured in contact with the upper surface of the solution storage member, connect the positive electrode of the low-frequency impedance meter to the first conductive member, and connect the negative electrode to the second conductive member; Static test.

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