Testing and evaluation devices and methods for disposable EEG probes

Abstract

In the testing and evaluation device and method for disposable EEG measurement probes, a first coupling component includes multiple electrically coupled parts, each positioned opposite an electrode in an external disposable EEG measurement probe, forming a capacitor-like structure corresponding to each electrode. An excitation signal generation component outputs an excitation signal A to each capacitor-like structure. A signal detection component acquires the detection signal B corresponding to each electrode in the disposable EEG measurement probe. A main control component evaluates the disposable EEG measurement probe based on the excitation signal A output by the excitation signal generation component and the detection signal B acquired by the signal detection component, outputting the evaluation result of the external disposable EEG measurement probe. By testing the conductivity of the EEG sensor without removing the protective film attached to the electrode surface or damaging the conductive gel, and adjusting the frequency and amplitude of the excitation signal as needed, potential faulty products with inadequate transmission characteristics can be identified.

Description

Technical Field

[0001] This application relates to the field of bioelectronics technology, specifically to a testing and evaluation device and method for a disposable electroencephalogram (EEG) probe. Background Technology

[0002] Medical EEG continuous monitoring typically uses disposable probes. To detect electrical signals at multiple points, multiple electrode pads are usually attached to the skin corresponding to the brain tissue. These electrode pads are usually formed by attaching deformable electrode pads or blocks made of soft materials with liquid absorption effects, such as sponges that have absorbed conductive gel or conductive paste, to the corresponding shaped conductive lines formed by bare electrodes on a flexible circuit board. Compared to common metal materials (such as copper, tin, gold, etc.), the conductive properties of conductive gel or conductive paste will change with storage time and environmental influences. Therefore, blister packs or release liner are usually used as protective films to protect them and the adhesive on the probe. When using them, the protective film is peeled off and the electrode pads are directly applied to the skin. The conductivity of the electrode pads determines the quality of the signals they acquire. Since EEG measurements involve simultaneously acquiring signals from multiple electrodes and performing correlation calculations to obtain usable multi-channel signals, which are then integrated for various analytical purposes, each electrode pad must not only be electrically conductive and consistent but also meet certain conductivity characteristics (such as response capability to specific frequency and amplitude signals). Furthermore, the production, assembly, and storage of disposable EEG probes can introduce various potential risks, leading to varying degrees of quality degradation. For example, during circuit board manufacturing, process control errors can cause copper leakage in closely spaced circuit traces, resulting in short circuits or excessively low impedance, leading to severe crosstalk or signal interference. Similarly, during factory assembly, accidental conductive particles may adhere to closely spaced conductive areas on the circuit board, causing short circuits.

[0003] In practical applications, to test the electrical connectivity of a fabricated EEG probe, the protective film on the electrode pads needs to be removed before directly contacting the electrical contacts with the electrode pads for measurement. This increases the possibility of electrode contamination and damage. Because the electrode pads are covered with adhesive, probes that directly contact the electrical contacts with the electrode pads for measurement are essentially unusable. Direct contact measurement is not suitable for scenarios requiring batch testing unless the probe is used immediately after measurement.

[0004] In existing technologies, some ECG probe testing devices can measure the electrical connectivity characteristics of the probe while retaining the protective film. However, such devices are usually designed for single electrode pads. For EEG probes with multiple electrodes, measurements must be performed sequentially, resulting in low efficiency. Moreover, existing devices only perform electrical connectivity tests, checking the continuity of individual circuits, and cannot test specific electrical characteristics. This means that probes that connect but have electrical characteristic issues cannot be identified, easily overlooking potentially faulty products. In highly demanding medical settings, such as disposable EEG probes used for monitoring anesthesia depth during surgery, this could have serious consequences.

[0005] The conductive materials on the electrode pads have a limited shelf life, and their electrical connection characteristics change over time. EEG probes with longer storage periods also require testing to prevent probe malfunctions and potential failures caused by denaturation or ineffectiveness of the conductive materials in the electrode pads and the adhesive used for bonding. However, performing pre-use performance testing on all EEG probes during both the production and usage stages, requiring sequential connection and testing of each electrode pad in each probe, is extremely inefficient. Summary of the Invention

[0006] The technical problem to be solved by the technical solution in this application is to propose a test and evaluation device and method for a disposable EEG measurement probe that simultaneously detects multiple electrode sheets based on the topology of the EEG probe. It can complete the detection of the electrical connection relationship of all electrodes in the EEG measurement probe in one connection or one alignment, which greatly improves the test efficiency. Moreover, it can also apply corresponding signal excitation to detect the signal transmission characteristics and screen out potentially faulty products.

[0007] The technical solution of this application to solve the above problems is a testing and evaluation device for a disposable EEG measurement probe, including a first coupling component, an excitation signal generation component, a main control component, and a signal detection component; the signal detection component is used to electrically connect with the conductive connector of an external disposable EEG measurement probe; the first coupling component is used to couple with each electrode in the external disposable EEG measurement probe to form a capacitor-like structure corresponding to each electrode; the first coupling component includes multiple electrical coupling parts, one electrical coupling part and one electrode in the external disposable EEG measurement probe are arranged opposite to each other to form a capacitor-like structure; the first coupling component is electrically connected to the excitation signal generation component, which is used to output an excitation signal A to each capacitor-like structure; the signal detection component is used to acquire the detection signal B corresponding to each electrode in the external disposable EEG measurement probe; the main control component is electrically connected to the excitation signal generation component and the signal detection component respectively, and the main control component evaluates the disposable EEG measurement probe based on the excitation signal A output by the excitation signal generation component and the detection signal B acquired by the signal detection component, and outputs the evaluation result of the external disposable EEG measurement probe.

[0008] The topology formed by multiple electrical coupling parts in the first coupling component corresponds to the topology of the external disposable EEG measurement probe to be tested; any electrical coupling part in the first coupling component includes a conductive electrode sheet or a defined conductive region, and the conductive electrode sheet or the defined conductive region is electrically connected to the excitation signal generation component; the conductive electrode sheet or the defined conductive region is used to be arranged opposite to each electrode in the external disposable EEG measurement probe, and coupled to form a capacitor-like structure.

[0009] Any electrical coupling part in the first coupling assembly includes a protective film, a conductive gel, and a conductive electrode sheet arranged sequentially from bottom to top. The conductive electrode sheet is electrically connected to the excitation signal generating assembly. The conductive electrode sheet is used to be arranged opposite to each electrode in the external disposable EEG measurement probe, and coupled to form a capacitor-like structure.

[0010] The first coupling assembly also includes multiple cables and conductive connectors; each cable is electrically connected to a conductive electrode in each electrical coupling part, the cable is electrically connected to the conductive connector, and the conductive connector is electrically connected to the excitation signal generating assembly.

[0011] The main control component includes an electroencephalogram (EEG) measuring instrument, and the signal detection component is the signal detection component within the EEG measuring instrument.

[0012] The testing and evaluation device for a disposable EEG measurement probe also includes an auxiliary fixing component, which is an auxiliary fixing structure made of non-conductive material, used to fix the disposable EEG probe to be tested on the first coupling component, ensuring that the relative position between the disposable EEG probe to be tested and the first coupling component does not shift during the testing process; it also includes a display module or indicator light module for displaying the testing and evaluation status.

[0013] The excitation signal generating component generates an excitation signal A, which is a set of excitation signals An, and inputs it from the conductive electrodes of the first coupling component to the disposable EEG measurement probe; n represents the nth electrical coupling part in the first coupling component; the value of n corresponds to the number of electrodes in the disposable EEG measurement probe; each electrical coupling part of the first coupling component corresponds to an input excitation signal; the excitation signals input to each electrical coupling part of the first coupling component are different excitation signals; correspondingly, the signal detection component acquires the detection signal B corresponding to each electrode, which is also a set of detection signals Bn; based on the set of detection signals Bn, an evaluation is performed, and the evaluation result of the external disposable EEG measurement probe is output.

[0014] The technical solution of this application to solve the above problems can also be a test and evaluation method for a disposable EEG measurement probe. Based on the test and evaluation device for the disposable EEG measurement probe, the method includes the following steps: S1: The first coupling component is set to correspond to each electrode in the disposable EEG measurement probe to form a capacitor-like structure corresponding to each electrode; S2: The main control component controls the excitation signal generation component to output an excitation signal An to each capacitor-like structure through the first coupling component.

[0015] S3: Signal detection component, acquires the detection signal Bn corresponding to each electrode in the external disposable EEG measurement probe under the excitation signal A; S4: The main control component evaluates based on the acquired detection signal Bn and outputs the evaluation result of the external disposable EEG measurement probe.

[0016] The excitation signal generating component generates an excitation signal A, which is a set of excitation signals An, and inputs it from the conductive electrodes of the first coupling component to the disposable EEG measurement probe; n represents the nth electrical coupling part in the first coupling component; the value of n corresponds to the number of electrodes in the disposable EEG measurement probe; each electrical coupling part of the first coupling component corresponds to an input excitation signal; the excitation signals input to each electrical coupling part of the first coupling component are different excitation signals; correspondingly, the signal detection component acquires the detection signal B corresponding to each electrode, which is also a set of detection signals Bn; based on the set of detection signals Bn, an evaluation is performed, and the evaluation result of the external disposable EEG measurement probe is output.

[0017] The testing and evaluation method for the disposable EEG measurement probe includes any one of the following technical features: Feature 1: The excitation signal A is a set of excitation signals An; the excitation signal An includes n signals with different frequencies; the connection status of each electrode and corresponding cable of the disposable EEG measurement probe is evaluated based on the signal frequency characteristics of a set of detection signals Bn; Feature 2: The excitation signal A is a set of excitation signals An; the excitation signal An includes n signals with different signal amplitudes; the connection status of each electrode and corresponding cable of the disposable EEG measurement probe is evaluated based on the signal amplitude characteristics of a set of detection signals Bn.

[0018] Compared with the prior art, one of the advantages of this application is that it can test the conductivity of the EEG sensor by capacitive coupling without removing the protective film, i.e., the blister pack or release film, attached to the electrode surface, or damaging the state of the electrode sheet and the adhesiveness of the probe.

[0019] Compared with existing technologies, one of the advantages of this application is the provision of an independent signal excitation component. This allows for adjustment of the frequency and amplitude of the excitation signal according to the situation, resulting in a better match between the test excitation signal and test conditions, and more accurate test results. In existing technologies, conventional capacitive coupling test methods, such as using the capacitance setting on a multimeter, focus on measuring the electrical characteristics of the capacitor itself. However, in this application, the characteristics of the capacitor itself are not the primary focus. The goal is to test the signal transmission capability of each cable in the entire disposable EEG measurement probe. Whether it is connected is only the first step; more importantly, it is to test the signal transmission capability after connection, such as signal attenuation on the cable. This test method can transmit periodic signals of different frequencies and amplitudes to the EEG sensor input channel via capacitive coupling. This test is closer to real-world application scenarios, enabling the screening of potentially faulty products that, although connected, have inadequate transmission characteristics. This improves test efficiency and facilitates subsequent processing by amplification and indication circuits.

[0020] Compared with the prior art, one of the beneficial effects of this application is that the excitation signal generation component can simulate mV-level or even uV-level EEG signals within a certain frequency band as coupling input signals through frequency-adjustable signal generation circuit and attenuation circuit, which is more in line with the signal conditions of real application scenarios and enhances the effectiveness of testing.

[0021] Compared with the prior art, one of the beneficial effects of this application is that the topology formed by the multiple electrical coupling parts in the first coupling component corresponds to the topology of the external disposable EEG measurement probe to be tested, thereby improving the efficiency of the test.

[0022] Compared with the prior art, one of the advantages of this application is that the first coupling component can be tested using the electrodes in the disposable EEG measurement probe, eliminating the workload of redesigning the test components.

[0023] Compared with the prior art, one of the advantages of this application is that the disposable EEG measurement probe is integrated as part of the test and evaluation device, which reduces the design workload of the test and evaluation device for disposable EEG measurement probes. The test can be completed simply by connecting the excitation signal generation component and a disposable EEG measurement probe.

[0024] Compared with the prior art, one of the beneficial effects of this application is that by using the EEG measuring instrument as the main control component and sharing the signal detection component, the design workload of the test and evaluation device for disposable EEG measuring probes is further reduced, and the test efficiency is higher, and the test scenario is closer to the signal detection conditions in the real application environment.

[0025] Compared with the prior art, one of the beneficial effects of this application is that the display module or indicator module can display the test evaluation status in a timely manner. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the topology of a disposable EEG measurement probe;

[0027] Figure 2 This is a schematic diagram of the electrical connections of the electrodes and EEG plug of a disposable EEG measurement probe;

[0028] Figure 3 This is one of the schematic diagrams of a disposable EEG measurement probe testing and evaluation device;

[0029] Figure 4 This is the second schematic diagram of a disposable EEG measurement probe testing and evaluation device;

[0030] Figure 5 This is the third schematic diagram of a disposable EEG measurement probe testing and evaluation device;

[0031] Figure 6 This is the fourth schematic diagram of a disposable EEG measurement probe testing and evaluation device;

[0032] Figure 7 This is the fifth schematic diagram of a disposable EEG measurement probe testing and evaluation device. Detailed Implementation

[0033] The contents of this application will be further described in detail below with reference to the accompanying drawings.

[0034] It should be noted that the following description of preferred embodiments of this application does not constitute any limitation on this application. The description of preferred embodiments is merely an illustration of the general principles of this application. The embodiments described in this application are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or component 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 on this application. Furthermore, the terms "first," "second," and technical features numbered with Arabic numerals 1, 2, 3, etc., and designations such as "A" and "B," are used for descriptive purposes only, for ease of explanation, and do not represent a temporal or spatial order; they should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first," "second," and numbered with Arabic numerals 1, 2, 3, etc., may explicitly or implicitly include one or more of that feature. In the description of this application, "several" means two or more, unless otherwise expressly and specifically defined.

[0036] like Figure 3 In an embodiment of a test and evaluation device for a disposable EEG probe, a first coupling component, an excitation signal generation component, a main control component, and a signal detection component are included. The signal detection component is used to electrically connect to the conductive connector of an external disposable EEG probe. The first coupling component is used to couple with each electrode in the external disposable EEG probe to form a capacitor-like structure corresponding to each electrode. The first coupling component includes multiple electrical coupling parts, one of which is positioned opposite to one electrode in the external disposable EEG probe to couple and form a capacitor-like structure. The first coupling component is electrically connected to the excitation signal generation component, which is used to output an excitation signal A to each capacitor-like structure. The signal detection component is used to acquire the detection signal B corresponding to each electrode in the external disposable EEG probe. The main control component is electrically connected to the excitation signal generation component and the signal detection component, respectively. The main control component evaluates the disposable EEG probe based on the excitation signal A output by the excitation signal generation component and the detection signal B acquired by the signal detection component, and outputs the evaluation result of the external disposable EEG probe.

[0037] like Figure 1The schematic diagram of the topology of the disposable EEG measurement probe illustrates the topology formed by the electrodes in the probe. This topology is only a representation of a spatial structure; the actual topology can be various specific structures. The specific topology of the first coupling component in this application needs to correspond to the topology of the actual disposable EEG measurement probe to be tested. The topology formed by the multiple electrical coupling parts in the first coupling component corresponds to the topology of the external disposable EEG measurement probe to be tested. Any electrical coupling part in the first coupling component includes a conductive electrode sheet or a defined conductive region, which is electrically connected to the excitation signal generating component. The conductive electrode sheet or defined conductive region is used to be positioned opposite to the electrodes in the external disposable EEG measurement probe, coupling to form a capacitor-like structure. Figure 1 and Figure 2 The plug in the middle is the conductive connector of the disposable EEG measurement probe, used to connect the disposable EEG measurement probe to external devices such as the monitor host.

[0038] like Figure 2 This diagram illustrates the electrical connections of the electrodes and plugs in a disposable EEG probe. In reality, each electrode in a disposable EEG probe corresponds to an independent electrical connection wire. These connection wires can be separate cables covered with insulating material, or multiple connection wires, each covered with insulating material, can be fixed within a single cable. The testing and evaluation device for the disposable EEG probe is used to check the electrical connection characteristics of each connection wire. One end of each connection wire in the disposable EEG probe is electrically connected to the conductive electrode pad, and the other end is electrically connected to the corresponding electrical connection post of the conductive connector or plug. Conventional probe measurements of this type typically test the connection characteristics of each connection wire individually, usually only testing whether it can conduct and transmit signals. Further testing of its specific connection characteristics is not possible, nor can further evaluation be performed to check for short circuits or other issues between multiple connection wires.

[0039] The topology formed by the multiple electrical coupling parts in the first coupling component corresponds to the topology of the external disposable EEG measurement probe under test, which greatly improves the testing efficiency. Multiple electrodes and cables in the disposable EEG measurement probe can be tested in one test connection, avoiding the need to connect and test one by one, thus improving the testing efficiency.

[0040] The first coupling component is a specially manufactured first coupling component. It can use a more stable conductive material than the conductive material (conductive gel, conductive paste, etc.) on disposable EEG electrodes, such as tin, copper, gold sheets, or conductive areas with specific conductive elements prepared through specific processes. It has better resistance to corrosion caused by environmental changes. At the same time, it can be corrected by periodically calibrating and correcting it, thereby ensuring the stability and standardization of the first coupling component as a reference point.

[0041] like Figure 4 In an embodiment of the test and evaluation device for a disposable EEG measurement probe, the capacitor-like structure includes conductive electrode pads, conductive gel, and a protective film in the electrical coupling section, as well as a protective film, conductive gel, and conductive electrode pads in the external disposable EEG measurement probe. The structure of the first coupling component is completely identical to the structure of the front part of the disposable EEG measurement probe, and the structure of the front part of the disposable EEG measurement probe can be directly used as the first coupling component, saving manufacturing costs. It can also be used as a test and evaluation device for disposable EEG measurement probes in certain emergency or clinical settings. Any electrical coupling section in the first coupling component includes a protective film, conductive gel, and conductive electrode pads arranged sequentially from bottom to top. The conductive electrode pads are electrically connected to the excitation signal generating component. The conductive electrode pads are arranged opposite to the electrodes in the external disposable EEG measurement probe, coupling to form a capacitor-like structure. The structure of the protective film, conductive gel, and conductive electrode pads arranged sequentially from bottom to top in the electrical coupling section is completely identical to the electrode arrangement in the external disposable EEG measurement probe. Therefore, the first coupling component can be tested using the electrodes in the disposable EEG measurement probe, eliminating the workload of redesigning the test components. Furthermore, this completely symmetrical structure for coupling ensures higher consistency in capacitive coupling, avoiding inconsistencies caused by design flaws in the electrical coupling section. In the event of a test or evaluation device malfunction, complete replacement is also extremely convenient and efficient.

[0042] In the dedicated testing phase of production, Figure 3 The solution in this case is more durable, and Figure 4 Compared to the scheme that uses another disposable EEG electrode as the first coupling component, Figure 3 The proposed solution is the preferred option for the dedicated testing phase of production.

[0043] like Figure 5 In one embodiment of the test and evaluation device for a disposable EEG measurement probe, the first coupling assembly further includes multiple cables and conductive connectors; each cable is electrically connected to a conductive electrode in each electrical coupling part, the cable and the conductive connector are electrically connected, and the conductive connector is electrically connected to the excitation signal generating component. Integrating the disposable EEG measurement probe as a whole into the test and evaluation device reduces the design workload of the device; testing can be completed simply by connecting the excitation signal generating component and a disposable EEG measurement probe.

[0044] like Figure 6In one embodiment of the test and evaluation device for a disposable EEG probe, the main control component includes an EEG meter, and the signal detection component is the signal detection component within the EEG meter. Using the EEG meter as the main control component and sharing the signal detection component further reduces the design workload of the test and evaluation device for the disposable EEG probe, while also increasing testing efficiency and allowing the test scenario to more closely resemble the signal detection conditions in real-world application environments.

[0045] In some embodiments of the test and evaluation device for disposable EEG probes not shown in the accompanying drawings, an auxiliary fixing component is also included. The auxiliary fixing component is an auxiliary fixing structure made of non-conductive material, used to fix the disposable EEG probe to be tested on the first coupling component, ensuring that the relative position between the disposable EEG probe to be tested and the first coupling component does not shift during the testing process; a display module or indicator light module is also included to display the test and evaluation status.

[0046] like Figure 7 In an embodiment of the test and evaluation device for a disposable EEG measurement probe, the excitation signal generating component generates an excitation signal A, which is a set of excitation signals An, and inputs it to the disposable EEG measurement probe from the conductive electrodes of the first coupling component; n represents the nth electrical coupling part in the first coupling component; the value of n corresponds to the number of electrodes in the disposable EEG measurement probe; each electrical coupling part of the first coupling component corresponds to an input excitation signal; the excitation signals input to each electrical coupling part of the first coupling component are different excitation signals; correspondingly, the signal detection component acquires a set of detection signals B corresponding to each electrode, which is also a set of detection signals Bn; evaluation is performed based on a set of detection signals Bn, and the evaluation result of the external disposable EEG measurement probe is output.

[0047] In an embodiment of the testing and evaluation method for a disposable EEG probe, the testing and evaluation device based on the aforementioned disposable EEG probe includes the following steps: S1: The first coupling component is configured to correspond to each electrode in the disposable EEG probe, forming a capacitor-like structure corresponding to each electrode; S2: The main control component controls the excitation signal generation component to output an excitation signal An to each capacitor-like structure via the first coupling component; S3: The signal detection component acquires the detection signal Bn corresponding to each electrode in the external disposable EEG probe under the excitation signal A; S4: The main control component evaluates based on the acquired detection signal Bn and outputs the evaluation result of the external disposable EEG probe. n is a natural number greater than or equal to 1.

[0048] In some embodiments, when the characteristics of the circuit under test formed by the electrodes and related conductive connecting lines and conductive connecting posts in the disposable EEG measurement probe are highly consistent, the excitation signal output to each capacitive structure can be the same signal, and the consistency of the acquired detection signal Bn can be used to determine whether the disposable EEG measurement probe is normal.

[0049] In some embodiments, when the characteristics of the circuit under test formed by the electrodes and related conductive wires and conductive posts in a disposable EEG probe are not highly consistent, the excitation signals output to each capacitive structure can be input into the corresponding electrical connection paths using a set of signals matched to the characteristics of the circuit under test. For example... Figure 7 As shown, the excitation signal generating component generates an excitation signal A, which is a set of excitation signals An, input from the conductive electrodes of the first coupling component to the disposable EEG measurement probe; n represents the nth electrical coupling unit in the first coupling component. Figure 7 In this context, n is 5; the value of n corresponds to the number of electrodes in the disposable EEG measurement probe; each electrical coupling part of the first coupling component corresponds to an input excitation signal; the excitation signals input to each electrical coupling part of the first coupling component are different excitation signals; correspondingly, the signal detection component acquires a set of detection signals B corresponding to each electrode, which is also a set of detection signals Bn; based on a set of detection signals Bn, an evaluation is performed, and the evaluation result of the external disposable EEG measurement probe is output.

[0050] In some embodiments, the excitation signal A is a set of excitation signals An; the excitation signal An includes n signals with different frequencies; the connection status of each electrode and corresponding cable of a disposable EEG measurement probe is evaluated based on the signal frequency characteristics of a set of detection signals Bn.

[0051] In some embodiments, the excitation signal A is a set of excitation signals An; the excitation signal An includes n signals with different signal amplitudes; the connection status of each electrode and corresponding cable of a disposable EEG measurement probe is evaluated based on the signal amplitude characteristics of a set of detection signals Bn.

[0052] like Figure 7 In this system, excitation signals A1 to A5 can be excitation signals of different frequencies or amplitudes. If all electrical connections in the disposable EEG probe are normal, the frequency characteristics or amplitude of the detected signals B1 to B5 should meet normal expectations. If the frequency characteristics or amplitude characteristics of the detected signals B1 to B5 do not meet expectations, the disposable EEG probe is abnormal. Not only can it detect abnormalities, but it can also identify and determine the specific fault type of the disposable EEG probe by analyzing the correspondence between excitation signals A1 to A5 and detected signals B1 to B5.

[0053] The signal detection component acquires the detection signal Bn of each electrode in the disposable EEG probe under test for signal An. If Bn reaches a certain amplitude, frequency, and waveform characteristic range, the disposable EEG probe is judged to be qualified. Furthermore, it allows for more refined grading and evaluation of the disposable EEG probe, going beyond simply labeling it as qualified or unqualified. This is significant for the incoming quality inspection and evaluation of the probe's conductive materials during production, as well as for the subsequent quality assessment and expiration time prediction during warehousing. Waveform characteristics include slope, inflection point position, and other features after specific mathematical transformations.

[0054] In addition, during the entire production process of disposable EEG probes, various problems can cause poor independence of the circuits between the electrodes. For example, two lines that should be run independently may be too close together, or the process error control during the production of the circuit board may not meet the standards, resulting in short circuits or low impedance between the two lines. This can lead to mutual interference and short circuits between two or more electrodes. By measuring with multiple electrodes simultaneously, it is also possible to detect whether there are crosstalk, short circuits or other problems between the electrodes. By sending different specified trigger signals (excitation signals) to the conductive areas on the first coupling components corresponding to different electrodes, the signals received by different probes on the disposable probe can be analyzed to identify short circuits or crosstalk.

[0055] If the amplitude of some of the detection signals B1 to B5 is too low or approaches zero, it indicates that there is an open circuit or excessive impedance in the electrical connection path corresponding to the signal; if some of the detection signals B1 to B5 experience crosstalk, it indicates that there is crosstalk or short circuit in the electrical connection path corresponding to the signal.

[0056] A testing and evaluation device for a disposable EEG probe includes a first coupling component comprising multiple electrically coupled parts, each positioned opposite an electrode from an external disposable EEG probe to form a capacitor-like structure corresponding to each electrode. An excitation signal generation component outputs an excitation signal A to each capacitor-like structure. A signal detection component acquires the detection signal B corresponding to each electrode in the disposable EEG probe. A main control component evaluates the disposable EEG probe based on the excitation signal A output by the excitation signal generation component and the detection signal B acquired by the signal detection component, outputting the evaluation result of the external disposable EEG probe. Without removing the protective film attached to the electrode surface or damaging the electrode pads, the device tests the conductivity of the EEG sensor and adjusts the frequency and amplitude of the excitation signal as needed, enabling the detection of potentially faulty products with inadequate transmission characteristics.

[0057] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of the application specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A testing and evaluation device for a disposable electroencephalogram (EEG) probe, characterized in that, It includes a first coupling component, an excitation signal generation component, a main control component, and a signal detection component; the signal detection component is used for electrical connection with the conductive connector of an external disposable EEG measurement probe; The first coupling component is used to couple with each electrode in the external disposable EEG measurement probe to form a capacitor-like structure corresponding to each electrode. The first coupling component includes multiple electrical coupling parts, one of which is positioned opposite to an electrode in an external disposable EEG measurement probe, and is coupled to form a capacitor-like structure. The first coupling component and the excitation signal generation component are electrically connected. The excitation signal generation component is used to output excitation signal A to each capacitive structure. The signal detection component is used to acquire the detection signal B corresponding to each electrode in the external disposable EEG measurement probe. The main control component is electrically connected to the excitation signal generation component and the signal detection component respectively. The main control component evaluates the detection signal B obtained by the signal detection component based on the excitation signal A output by the excitation signal generation component using a disposable EEG probe, and outputs the evaluation result of the external disposable EEG probe. The topology formed by the multiple electrical coupling parts in the first coupling component corresponds to the topology of the external disposable EEG measurement probe to be tested. Any electrical coupling part in the first coupling assembly includes a conductive electrode sheet or a defined conductive region, and the conductive electrode sheet or the defined conductive region is electrically connected to the excitation signal generating assembly. The conductive electrode pads or defined conductive areas are used to be positioned opposite to the electrodes in the external disposable EEG measurement probe, coupling to form a capacitor-like structure.

2. The testing and evaluation device for a disposable EEG measurement probe according to claim 1, characterized in that, Any electrical coupling part in the first coupling assembly includes a protective film, a conductive gel and a conductive electrode sheet arranged sequentially from bottom to top, and the conductive electrode sheet is electrically connected to the excitation signal generating assembly. The conductive electrode pads are used to be positioned opposite to the electrodes in the external disposable EEG measurement probe, coupling to form a capacitor-like structure.

3. The testing and evaluation device for a disposable EEG measurement probe according to claim 2, characterized in that, The first coupling assembly also includes multiple cables and conductive connectors; each cable is electrically connected to a conductive electrode in each electrical coupling part, the cable is electrically connected to the conductive connector, and the conductive connector is electrically connected to the excitation signal generating assembly.

4. The testing and evaluation device for a disposable EEG measurement probe according to claim 3, characterized in that, The main control component includes an electroencephalogram (EEG) measuring instrument, and the signal detection component is the signal detection component within the EEG measuring instrument.

5. The testing and evaluation device for a disposable EEG measurement probe according to claim 1, characterized in that, It also includes an auxiliary fixation component, which is an auxiliary fixation structure made of non-conductive material, used to fix the disposable EEG probe to be tested onto the first coupling component; It also includes a display module or indicator module for displaying the test evaluation status.

6. The testing and evaluation device for a disposable EEG measurement probe according to claim 1, characterized in that, The excitation signal generating component generates an excitation signal A, which is a set of excitation signals An, which is input from the conductive electrodes of the first coupling component to the disposable EEG measurement probe; n represents the nth electrical coupling part in the first coupling component; the value of n corresponds to the number of electrodes in the disposable EEG measurement probe; Each electrical coupling part of the first coupling component corresponds to an input excitation signal; the input excitation signals of each electrical coupling part of the first coupling component are different excitation signals; Correspondingly, the signal detection component acquires a set of detection signals B corresponding to each electrode, which is also a set of detection signals Bn; it evaluates based on a set of detection signals Bn and outputs the evaluation results of the external disposable EEG measurement probe.

7. A testing and evaluation method for a disposable electroencephalogram (EEG) probe, characterized in that, The testing and evaluation device based on the disposable EEG measurement probe according to any one of claims 1 to 6 includes the following steps: S1: The first coupling component is set up in correspondence with each electrode in the disposable EEG measurement probe to form a capacitor-like structure corresponding to each electrode; S2: The main control component controls the excitation signal generation component, and outputs excitation signal An to each capacitor-like structure through the first coupling component; S3: Signal detection component, which acquires the detection signals Bn corresponding to each electrode in the external disposable EEG probe under the condition of excitation signal A; S4: The main control component evaluates the acquired detection signal Bn and outputs the evaluation results from the external disposable EEG measurement probe.

8. The testing and evaluation method for the disposable EEG measurement probe according to claim 7, characterized in that, The excitation signal generating component generates an excitation signal A, which is a set of excitation signals An, which is input from the conductive electrodes of the first coupling component to the disposable EEG measurement probe; n represents the nth electrical coupling part in the first coupling component; the value of n corresponds to the number of electrodes in the disposable EEG measurement probe; Each electrical coupling part of the first coupling component corresponds to an input excitation signal; the input excitation signals of each electrical coupling part of the first coupling component are different excitation signals; Correspondingly, the signal detection component acquires a set of detection signals B corresponding to each electrode, which is also a set of detection signals Bn; it evaluates based on a set of detection signals Bn and outputs the evaluation results of the external disposable EEG measurement probe.

9. The testing and evaluation method for the disposable EEG measurement probe according to claim 7, characterized in that, Includes any one of the following technical features: Feature 1: Excitation signal A is a set of excitation signals An; excitation signal An includes n signals with different frequencies; the connection status of each electrode and corresponding cable of a disposable EEG measurement probe is evaluated based on the signal frequency characteristics of a set of detection signals Bn. Feature 2: Excitation signal A is a set of excitation signals An; excitation signal An includes n signals with different amplitudes; the connection status of each electrode and corresponding cable of a disposable EEG measurement probe is evaluated based on the amplitude characteristics of a set of detection signals Bn.

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