A testing device for non-destructive testing of wet electrode sheets

Abstract

The application discloses a testing device for nondestructive testing of wet electrode sheets, which comprises a workbench part for placing and fixing the testing electrode sheet, an excitation signal output part for contacting with the release film of the wet electrode sheet to be tested, a response signal input part for connecting with the metal part of the lead-out end of the wet electrode sheet to be tested, and a testing result display and system parameter adjustment part, wherein the excitation signal output part is connected with the response signal input part, and the response signal input part is connected with the testing result display and system parameter adjustment part. The application is simple in operation, fast in testing, does not destruct the electrode sheet, and meets the factory inspection of the wet electrode sheet in the normal production environment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a testing device for non-destructive testing of wet electrode patches. BACKGROUND

[0002] In today's society, cardiovascular disease (CVD) has become the leading cause of death worldwide. According to the China Cardiovascular Disease Report 2018, the number of people with cardiovascular disease in China is 290 million, and cardiovascular disease deaths account for more than 40% of the disease deaths of residents, and the number of people with cardiovascular disease in China will continue to grow rapidly in the next ten years. At the same time, with the acceleration of the aging process of China's population, cardiovascular disease will bring unprecedented pressure to China's population health. Achieving early screening and diagnosis of cardiovascular disease and improving health protection levels has become a major strategic issue for China's social and economic development.

[0003] The electrode patches used by the commonly used portable electrocardiogram equipment in the prior art are all wet electrode patches.

[0004] The common electrocardiogram equipment in the clinic at present includes conventional static electrocardiogram equipment, conventional electrocardiogram monitor and traditional dynamic electrocardiogram equipment, and wet electrode patches are used in a long-term use. The electrode patch of this type is composed of conductive gel and metal conductor part. In the production process, the metal conductor part is more prone to breakage and other production defects. However, due to the special nature of the gel part, the conventional electrode patch factory detection method can only be destructive detection, that is, after testing, the electrode patch is scrapped, so that full inspection cannot be performed at the factory, and only sampling inspection can be performed, which leads to the fact that some faulty electrode patches are found to have problems when used after being put into the market, causing adverse effects. SUMMARY

[0005] In order to overcome the shortcomings of the prior art, the present application provides a testing device for non-destructive testing of wet electrode patches, which is simple to operate, fast to test, does not damage the electrode patch, and meets the production user's factory inspection of wet electrode patches in the normal production environment.

[0006] The technical scheme adopted by the present application to solve its technical problems is:

[0007] A testing device for non-destructive testing of wet electrode patches, comprising a workbench part for placing and fixing the test electrode patch, an excitation signal output part in contact with the release film of the wet electrode patch to be tested, a response signal input part connected with the metal part of the lead-out end of the wet electrode patch to be tested, and a test result display and system parameter adjustment part, the excitation signal output part is connected with the response signal input part, and the response signal input part is connected with the test result display and system parameter adjustment part.

[0008] Further, the excitation signal output part includes a signal generator, a first controllable switch array and metal plates, the signal generator is used to generate a plurality of waveforms, amplitude, frequency adjustable differential excitation signal, the metal plates are configured according to the electrode point number and position of the wet electrode to be measured, connected to the signal generator through the first controllable switch array, and fixed at the specified position of the upper pressing plate, so as to be closest to each gel point of the electrode sheet and have the maximum overlapping area when clamping the electrode sheet, each metal plate corresponds to a gel to form a large capacitor, so that the alternating signal output by the signal generator can be conducted to the corresponding electrode of the wet electrode to be measured, and the first controllable switch array is automatically controlled by software to dynamically configure the differential output of the signal generator to any two metal plates, so as to traverse all electrode point paths of the wet electrode to be measured.

[0009] Preferably, the differential excitation signal includes but is not limited to square wave, sine wave and the like.

[0010] Further, the response signal input part includes contact metal spring needles, a second controllable switch array, a signal conditioning and amplification module and a signal acquisition output module, the contact metal spring needles are fixed to the workbench part, the second controllable switch array is automatically controlled by software to dynamically connect a pair of metal spring needles to the signal conditioning and amplification module until all the contact metal spring needles are traversed, the signal conditioning and amplification module includes a pre-amplification circuit and a filter circuit, the input signal is filtered to remove out-of-band noise and then input to the next stage, and the signal acquisition output module samples and digitizes the output of the front-stage signal conditioning and amplification module and outputs through a communication interface.

[0011] Further, the test result display and system parameter adjustment part includes a display screen and a signal acquisition input module, the signal acquisition input module collects the digital signal of the signal acquisition output module of the response signal input part, compares it with the output original waveform of the signal generator, and displays the test result on the display screen.

[0012] The workbench part includes an upper pressing plate, an electrode groove and a lower top plate, the electrode groove is replaced according to the shape of different wet electrode sheets to be measured, so as to be more convenient to adapt, and the upper pressing plate and the lower top plate can freely move up and down and can form a good clamping on the wet electrode sheet to be measured, so as to obtain more stable test results.

[0013] Preferably, the metal plate of the response signal input part is installed at the position of the upper pressing plate where the electrode of the wet electrode to be measured contacts, the contact metal spring needle is installed at the position of the lower top plate where the metal conductor of the wet electrode to be measured contacts, and the wet electrode to be measured is placed at the electrode groove. The contact metal spring needle is fixed at the specified position of the lower top plate, so as to contact the metal part of the electrode sheet when clamping the wet electrode to be measured.

[0014] The beneficial effects of the present application are mainly reflected in:

[0015] 1. Easy to implement mass production testing;

[0016] 2. Simple operation, only need to be tested wet electrode to the workbench, according to the characteristics of the electrode to be tested set test parameters, start test program, the test device will automatically test process, to display the electrode metal conductor fracture in the form of graph;

[0017] 3. Convenient for a variety of electrode test, only need to change the workbench upper plate, lower plate and electrode groove to adapt to.

[0018] 4. The test device and test method of the present application for testing wet electrode based on nondestructive testing, will not cause any damage to the electrode, especially the gel part. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A kind of nondestructive testing wet electrode test device principle diagram. DETAILED DESCRIPTION

[0020] The present application will be further described below in conjunction with the drawings.

[0021] Referring to Figure 1 A kind of nondestructive testing wet electrode test device 100, including placing and fixed test electrode workbench portion 110, with the wet electrode to be tested release film contact excitation signal output portion 120, with the wet electrode to be tested lead-out end metal part connected signal input portion 130 and test result display and system parameter adjustment portion 140, the workbench portion includes upper plate 111, electrode groove 112 and lower plate 113, the excitation signal output portion includes signal generator module 121, controllable switch array 122 and metal flat plate 123, the response signal input portion includes contact metal spring needle 131, controllable switch array 132, signal conditioning acquisition amplification module 133 and acquisition signal output module 134, the test result display and system parameter adjustment portion includes display screen 141 and acquisition signal input module 142. The metal flat plate 123 is installed at the upper plate 111 and the wet electrode to be tested electrode contact coincident position, the contact metal spring needle 131 is installed at the lower plate 113 and the wet electrode to be tested metal conductor contact position, the wet electrode to be tested is placed at the electrode groove 112.

[0022] The workbench part 110 is composed of an upper pressing plate 111, an electrode groove 112 and a lower top plate 113. The electrode groove 112 can be replaced according to the shape of different wet electrode sheets to be tested, so as to be more convenient to adapt. The upper pressing plate 111 and the lower top plate 113 can move up and down freely and can form a good clamping on the wet electrode sheet to be tested, so as to obtain more stable test results.

[0023] The excitation signal output part 120 includes a signal generator 121, a first controllable switch array 122 and a metal plate 123. The signal generator 121 is a differential output and is connected with the first controllable switch array 122. The first controllable switch array 122 is automatically controlled by software to switch and dynamically excite the excitation signal to one pair of the metal plate 123 until all the metal plates are excited. The dwell time of each switching is determined by the frequency of the excitation signal to ensure that the excitation signal is captured by the response signal input part 130 for a sufficient time. The number and position of the metal plate 123 are determined according to the number and position of the electrodes of the wet electrode sheet to be tested. All the metal plates are connected with the first controllable switch array 122 and are arranged in pairs in parallel with the electrode points of the wet electrode sheet to be tested.

[0024] The response signal input part 130 includes contact metal spring needles 131, a second controllable switch array 132, a signal conditioning and amplification module 133 and an output module 134 for collecting signals. The number of the contact metal spring needles 131 is determined by the number of the metal conductor lead points of the wet electrode sheet to be tested and is fixed at a specified position of the lower top plate 113 so as to be in direct contact with the metal conductor lead points of the wet electrode sheet to be tested when the wet electrode sheet is clamped. The second controllable switch array 132 is automatically controlled by software to switch and dynamically connect the pair of metal spring needles with the excitation signal with the signal conditioning and amplification module 133 according to the gating condition of the controllable switch array 122 of the excitation signal output part 120 until all the metal spring needles are traversed. The signal conditioning and amplification module 133 includes a pre-amplification and filtering part to filter out the out-of-band noise of the input excitation signal and amplify the signal to input the next stage. The output module 134 for collecting signals samples and digitizes the output of the signal conditioning and amplification module of the previous stage and outputs through a communication interface.

[0025] The test result display and system parameter adjustment part 140 includes a display screen 141 and a signal collection input module 142. The signal collection input module 142 receives the digital signal of the signal collection output module 134 and compares the frequency, amplitude and other characteristics of the excitation original waveform output by the signal generator 121, and displays the test results on the display screen.

[0026] In this example, the metal plate 123 and the conductive gel of the wet electrode to be tested form a flat plate capacitor with the release film as the insulating medium. The flat plate capacitor has less attenuation to high frequency signals, so it can allow high frequency signals to pass through, thereby converting the conventional DC signal test of conductor continuity into a high frequency signal test of conductor continuity. In this way, the non-destructive testing of the metal conductor of the wet electrode can be realized.

[0027] The signal generator 121 can output excitation signals of different frequencies and amplitudes to adapt to capacitors of various capacitances caused by different gel materials, areas, and release film thicknesses, ensuring that the attenuation of the capacitor to the excitation signal is minimal, thereby minimizing errors.

[0028] The first controllable switch array 122 and the second controllable switch array 132 select a pair of signal paths in the same time period, i.e., route the excitation signal output from the signal generator 121 to the signal conditioning and amplification module 133. This ensures that the response signal input part 130 collects the correct signal. At the same time, the first controllable switch array 122 and the second controllable switch array 132 select all the wet electrode paths to be tested with the least number of times. For example, if there are 6 electrode points in the wet electrode to be tested, the first controllable switch array 122 and the second controllable switch array 132 only need to pass through all 6 electrode paths 3 times, i.e., the first time selects 1 and 2, the second time selects 3 and 4, and the third time selects 5 and 6. In this way, the continuity of the metal conductor in all 6 electrode paths can be tested. If there is a conductor break in the three times, there are two processing conditions, one is to directly scrap the problem wet electrode, and the other is to form a new pair of signals by combining the two electrode paths with other normal electrode paths, and then continue testing, for example, if 3 and 4 are problematic and the others are normal, then 3, 1 and 4, 1 are combined to form two new signal paths for testing to find the problematic electrode path.

[0029] The collected signal input module 142 compares the received signal with the original excitation signal output by the signal generator 121 at this time to determine the continuity of the conductor. For example, if the excitation signal of the signal generator 121 is a 5Hz sine wave, and the collected signal input module 142 collects a 5Hz sine wave with an amplitude within the error range, which is determined by the characteristics of the wet electrode to be tested, then the pair of paths is normal. If it cannot be collected, there is a break in the pair of paths.

[0030] The test result display and system parameter adjustment part 140 can manually adjust system parameters such as the type, frequency, and amplitude of the excitation signal, the number of metal plates 123, and the number of contact metal springs 131 according to the characteristics of the wet electrode to be tested.

[0031] The embodiments of the present specification are merely illustrative of the implementation forms of the inventive concept, and are only used for the purpose of description. The protection scope of the present application should not be regarded as being limited to the specific forms shown in the embodiments, and the protection scope of the present application also includes the equivalent technical means that can be thought of by those skilled in the art according to the inventive concept.

Claims

1. A testing device for non-destructive testing of a wet electrode sheet, characterized by The test device comprises a workbench part for placing and fixing the test electrode sheet, an excitation signal output part for contacting the wet electrode sheet to be tested, a response signal input part for connecting with the metal part of the lead-out end of the wet electrode sheet to be tested, and a test result display and system parameter adjustment part, the excitation signal output part is connected with the response signal input part, and the response signal input part is connected with the test result display and system parameter adjustment part; The excitation signal output part comprises a signal generator, a first controllable switch array and a metal plate, the signal generator is used for generating a differential excitation signal with adjustable waveforms, amplitudes and frequencies, the metal plate is configured according to the number and position of the electrode points of the wet electrode sheet to be tested, is connected to the signal generator through the first controllable switch array, and is fixed at a specified position of the upper pressing plate, so as to be closest to each gel point of the electrode sheet and have the maximum overlapping area when the electrode sheet is clamped, each metal plate corresponds to a gel to form a large capacitor, so that the alternating signal output by the signal generator can be conducted to the corresponding electrode of the wet electrode sheet to be tested, and the first controllable switch array is automatically controlled by software to dynamically configure the differential output of the signal generator to any two metal plates to traverse all electrode point paths of the wet electrode to be tested. The response signal input part comprises a contact metal spring needle, a second controllable switch array, a signal conditioning and amplification module and an output module for collecting signals, the contact metal spring needle is fixed to the workbench part, the second controllable switch array is automatically controlled by software to dynamically connect a pair of metal spring needles with the signal conditioning and amplification module until all the contact metal spring needles are traversed, the signal conditioning and amplification module comprises a pre-amplification circuit and a filter circuit, the input signal is filtered to remove out-of-band noise and then input to the next stage, and the output module for collecting signals samples and digitizes the output of the front-stage signal conditioning and amplification module and outputs through a communication interface.

2. The test device for non-destructive testing of a wet electrode sheet according to claim 1, wherein The differential excitation signal is a square wave or a sine wave.

3. A test device for non-destructive testing of a wet electrode sheet according to claim 1 or 2, characterized in that The test result display and system parameter adjustment part comprises a display screen and a signal collection input module, the signal collection input module collects the digital signal of the signal collection output module of the response signal input part, compares the output original waveform of the signal generator, and displays the test result on the display screen.

4. A testing device for non-destructive testing of a wet electrode sheet according to claim 1 or 2, characterized in that The workbench part comprises an upper pressing plate, an electrode groove and a lower top plate, the electrode groove is replaced according to the shapes of different wet electrode sheets to be tested to facilitate the adaptation, and the upper pressing plate and the lower top plate can freely move up and down and can form a good clamping on the wet electrode sheet to be tested to obtain more stable test results.

5. A test device for non-destructive testing of a wet electrode sheet as defined in claim 4, characterized in that The metal plate of the response signal input part is installed at the position of the upper pressing plate where the electrode of the wet electrode sheet to be tested is in contact and coincides, the contact metal spring needle is installed at the position of the lower top plate where the metal conductor of the wet electrode sheet to be tested is in contact, and the wet electrode sheet to be tested is placed at the electrode groove.

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