Electroencephalogram sensor performance detection method, device and equipment and storage medium

Abstract

The invention discloses an electroencephalogram sensor performance detection method, device and equipment and a storage medium, and relates to the technical field of sensor detection.The method comprises the steps that after electrodes of an electroencephalogram sensor are connected in a glue-to-glue mode, direct-current electrification is conducted on the electrodes, and direct-current offset voltage, instability peak voltage and two-end change voltage are determined; performing alternating current on the electrode pair, and determining alternating current impedance and polarization electromotive force; and comparing the direct-current offset voltage, the instability peak voltage, the two-end change voltage, the alternating-current impedance and the polarized electromotive force with a preset standard to determine a performance detection result. Due to the fact that direct-current offset voltage, instability peak voltage, two-end change voltage, alternating-current impedance and polarization electromotive force are tested through direct-current power-on and alternating-current power-on, the situation that electroencephalogram signals are deviated due to single-function detection of traditional electrode performance is avoided, and therefore the problems of electrode performance and safety of the electroencephalogram sensor are solved. And the signal quality of the electroencephalogram signal is ensured.

Description

Technical Field

[0001] The present application relates to the field of sensor detection technology, and in particular to a method, device, equipment and storage medium for detecting performance of an electroencephalogram (EEG) sensor. Background Art

[0002] As a vital bioelectric signal, EEG signals play an irreplaceable role in many key fields. In the process of measuring EEG signals, the accuracy and reliability of the ECG monitoring link are crucial. Most of the EEG electrodes currently used in clinical practice are disposable EEG electrode sheets. As key components that directly contact the human body and collect signals, electrodes and lead wires must ensure good performance, so performance testing is required.

[0003] However, traditional performance testing is generally a single function test, and there are problems such as DC offset voltage, compound offset instability, and defibrillator overload during the use of electrodes. These problems will cause deviations or distortions in EEG signals and reduce the safety of using EEG sensor electrodes. Summary of the invention

[0004] The main purpose of this application is to provide an EEG sensor performance detection method, device, equipment and storage medium, aiming to solve the technical problem that due to various problems existing in the use of electrodes, traditional electrode performance detection is generally a single function detection, which will cause deviation or distortion of EEG signals and reduce the safety of the use of EEG sensor electrodes.

[0005] To achieve the above objectives, the present application proposes a method for detecting the performance of an EEG sensor, the method comprising:

[0006] After the electrodes of the EEG sensor are connected to each other, direct current is applied to the electrodes to determine the direct current offset voltage, the instability peak voltage and the voltage variation at both ends during the direct current application process;

[0007] Applying AC power to the electrode pair, and determining AC impedance and polarization electromotive force during the AC power application process;

[0008] The performance test result is determined by comparing the DC offset voltage, the instability peak voltage, the voltage variation at both ends, the AC impedance and the polarization electromotive force with a preset standard.

[0009] In one embodiment, the step of determining a DC offset voltage during a DC power-on process includes:

[0010] After direct current is applied to the electrode pair, the power-on time is recorded;

[0011] When the power-on time reaches a first preset time of a stable period, a DC offset voltage after the first preset time is collected, wherein the DC offset voltage in the preset standard is not greater than the first preset voltage.

[0012] In one embodiment, after the step of recording the power-on time after applying direct current to the electrode pair, the method further comprises:

[0013] When the power-on time reaches a first preset time of a stable period, determining a frequency band during the direct current power-on process;

[0014] In a frequency band within a preset range, an instability peak voltage is collected, wherein the instability peak voltage in the preset standard is not greater than a second preset voltage, and the second preset voltage is less than the first preset voltage.

[0015] In one embodiment, the step of determining the voltage change at both ends during the DC power-on process includes:

[0016] Applying direct current to the electrode pair according to a first preset current;

[0017] The voltage variation between the two ends of the electrode pair within a preset time period is collected, and the voltage variation between the two ends in the preset standard is not greater than the first preset voltage.

[0018] In one embodiment, the step of determining the AC impedance during the AC power-on process includes:

[0019] Applying alternating current to the electrode pair according to a second preset current, and collecting impedance values ​​multiple times;

[0020] The impedance values ​​are averaged to determine the AC impedance, and the AC impedance in the preset standard does not exceed the preset resistance value.

[0021] In one embodiment, the step of determining the polarization electromotive force during the AC power-on process includes:

[0022] discharging a capacitor in series with the electrode pair and the resistor, and recording the discharge time;

[0023] When the discharge time reaches a second preset time, the polarization electromotive force of the electrode pair is collected, and the absolute value of the polarization electromotive force in the preset standard does not exceed the first preset voltage.

[0024] In addition, to achieve the above purpose, the present application also proposes an electroencephalogram sensor performance detection device, the device comprising:

[0025] A DC data module is used to apply DC power to the electrode pair after the electrode pair of the EEG sensor is connected to each other, and determine the DC offset voltage, the instability peak voltage and the voltage change at both ends during the DC power-on process;

[0026] An AC data module, used to conduct AC power to the electrode pair and determine the AC impedance and polarization electromotive force during the AC power-on process;

[0027] The performance determination module is used to determine the performance detection result by comparing the DC offset voltage, the instability peak voltage, the voltage variation at both ends, the AC impedance and the polarization electromotive force with a preset standard.

[0028] In addition, to achieve the above-mentioned purpose, the present application also proposes an EEG sensor performance detection device, which includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the EEG sensor performance detection method as described above.

[0029] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by the processor, the steps of the EEG sensor performance detection method described above are implemented.

[0030] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the EEG sensor performance detection method as described above.

[0031] One or more technical solutions proposed in this application have at least the following technical effects: first, after the electrode pair of the EEG sensor is connected to each other by glue, the electrode pair is energized by direct current to determine the DC offset voltage, the instability peak voltage and the voltage change at both ends during the DC energization process; then, the electrode pair is energized by alternating current to determine the AC impedance and polarization electromotive force during the AC energization process; finally, the DC offset voltage, the instability peak voltage, the voltage change at both ends, the AC impedance and the polarization electromotive force are compared with the preset standard to determine the performance test result. Since the present application tests the DC offset voltage, the instability peak voltage, the voltage change at both ends, the AC impedance and the polarization electromotive force by direct current energization and alternating current energization, it avoids the situation where the single function test of the traditional electrode performance test causes the EEG signal to deviate or distort, thereby solving the problem of the performance and safety of the EEG sensor electrode and greatly ensuring the signal quality of the EEG signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0034] Figure 1 A schematic diagram of a flow chart provided for Embodiment 1 of the method for detecting performance of an electroencephalogram sensor of the present application;

[0035] Figure 2 A schematic diagram of a flow chart provided for Embodiment 2 of the method for detecting performance of an electroencephalogram sensor of the present application;

[0036] Figure 3 This is a schematic diagram of the module structure of the EEG sensor performance detection device according to an embodiment of the present application;

[0037] Figure 4 Schematic diagram of the device structure of the hardware operating environment involved in the EEG sensor performance detection method in the embodiment of the present application.

[0038] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0039] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0040] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0041] The present application provides a method for detecting the performance of an EEG sensor, the purpose of which is to solve the performance and safety issues of EEG sensor electrodes, the problems of which are as follows:

[0042] AC impedance: AC impedance simulates the impedance of human skin. The current-limiting resistor may generate a large amount of heat at the contact surface between the skin and the electrode, which will increase the possibility of damage to the patient and electrode failure. Therefore, the AC impedance of the electrode pair needs to be tested for performance.

[0043] DC offset voltage: EEG monitors will cause saturation distortion under the influence of excessively high DC offset voltage, so performance testing of the offset voltage of the electrode pair is required.

[0044] Internal noise: Internal noise is a reinforcement of the offset voltage requirement. The instantaneous change of the offset voltage may exceed the specified limit, so performance testing of the internal noise is required.

[0045] Bias current tolerance: The reactants of the chemical reaction necessary for the EEG electrode to transmit current are depleted at the junction of the electrode or electrolyte, resulting in a significant change in potential when a DC bias current is applied. Therefore, it is necessary to verify whether the EEG electrode is compatible with the DC bias current.

[0046] Defibrillation overload recovery: Unqualified electrodes may cause the patient's death, so it is necessary to test the performance of EEG electrodes to see if they can recover from defibrillation overload.

[0047] In order to accurately and efficiently collect and process EEG signals, it is necessary to test the performance and safety of electrodes as much as possible to improve the quality of input signals. The EEG sensor performance detection method of this application can solve the performance and safety issues of EEG electrodes by testing performance data such as AC impedance, DC offset voltage, composite offset instability and internal noise, bias current tolerance, and defibrillation overload recovery.

[0048] It should be noted that the execution subject of this embodiment can be a computing service device with DC detection, AC detection and performance detection functions, such as an EEG monitor, an EEG tester, etc., or an electronic device that can realize the above functions, an EEG sensor performance detection device (detection device) that executes the EEG sensor performance detection method of this application, etc., and this embodiment does not limit this. The following takes the detection device as an example to illustrate this embodiment and the following embodiments.

[0049] Based on this, the present application embodiment provides a method for detecting the performance of an electroencephalogram sensor. Figure 1 , Figure 1 A schematic diagram of the flow chart provided for Embodiment 1 of the method for detecting performance of an electroencephalogram sensor of the present application.

[0050] In this embodiment, the EEG sensor performance detection method includes steps S10 to S30:

[0051] Step S10: After the electrode pairs of the EEG sensor are connected to each other, direct current is energized to the electrode pairs to determine the direct current offset voltage, the instability peak voltage and the voltage variation at both ends during the direct current energization process.

[0052] It should be noted that EEG sensors are devices used to detect and collect electrical signals generated by brain activity. They consist of multiple electrodes that can be placed at specific locations on the scalp surface and sense the weak electrophysiological signals generated by brain neuron activity by contacting the scalp.

[0053] It should be noted that glue-to-glue connection means that the electrode and related components are connected and fixed by glue. This connection method helps to ensure the stability and good contact of the electrode during use.

[0054] It should be noted that the DC offset voltage is a fixed DC voltage deviation between the electrode pairs of the EEG sensor.

[0055] DC offset voltage will have a certain impact on the measurement of EEG signals. If the DC offset voltage is too large, it may interfere with the accurate acquisition and analysis of real EEG activity signals, so it needs to be detected.

[0056] It should be noted that the instability peak voltage is the voltage peak value of the instantaneous change of the offset voltage at both ends of the electrode pair within a specific time period, which reflects the internal noise of the offset voltage.

[0057] It should be noted that the changing voltage at both ends is the dynamic change of the voltage at both ends of the electrode pair, which reflects the voltage fluctuations and changes caused by brain activity or other factors.

[0058] In one embodiment, after the electrode pairs of the EEG sensor are connected rubber to rubber, the detection device can first apply direct current to the electrode pairs to determine the DC voltage deviation (i.e., DC offset voltage) between the electrode pairs during the DC power-on process, the voltage peak value of the instantaneous change of the offset voltage at both ends of the electrode pair (i.e., instability peak voltage), and the dynamic change of the voltage at both ends of the electrode pair (i.e., the changing voltage at both ends).

[0059] Step S20: applying AC power to the electrode pair to determine the AC impedance and polarization electromotive force during the AC power application process.

[0060] It should be noted that AC impedance refers to the ability of the EEG sensor electrode pair to hinder the passage of current under the action of AC signals.

[0061] AC impedance reflects the resistance characteristics between the electrode and the skin or other contact interface as well as some characteristics of the electrode itself. AC impedance affects the quality and measurement accuracy of EEG signals, so it needs to be tested.

[0062] It should be noted that the polarization electromotive force is a stable potential difference generated on the electrode surface due to the electrochemical reaction between the electrode material and the solution when the electrode pair of the EEG sensor contacts the electrolyte solution.

[0063] Polarization electromotive force will cause certain interference to the measurement of EEG signals, so the EEG sensor needs to be tested in this aspect to minimize its impact.

[0064] In one embodiment, after the DC power-on test, the detection device can also perform AC power-on on the electrode pair to determine the ability of the electrode pair to hinder the passage of current (i.e., AC impedance) and the stable potential difference (i.e., polarization electromotive force) generated on the electrode surface during the AC power-on process.

[0065] Step S30: Determine a performance test result by comparing the DC offset voltage, the instability peak voltage, the voltage variation at both ends, the AC impedance and the polarization electromotive force with a preset standard.

[0066] It should be noted that the preset standard refers to a specific numerical standard that is preset before the performance test of the electrode pair of the EEG sensor is performed to determine whether the EEG sensor meets the requirements.

[0067] For example, a numerical limit can be set for DC offset voltage, unstable peak voltage, voltage variation at both ends, AC impedance and polarization electromotive force. When the actual detected value is compared with these preset standard values, if it is within the range, it means it is normal or qualified, and if it is out of the range, it means there is an abnormality or it does not meet the standard. This ensures the accuracy and consistency of EEG sensor detection.

[0068] It should be noted that the performance test results are the conclusions obtained after testing and evaluating the performance indicators of the electrodes in the EEG sensor. For example, when the actual test values ​​of the above tests are compared with these preset standard values, if they are within the range, they are qualified, and if they are out of the range, they do not meet the standards.

[0069] This embodiment provides a method for detecting the performance of an EEG sensor. After the electrodes of the EEG sensor are connected to each other, the detection device can first apply direct current to the electrode pairs to determine the DC voltage deviation (i.e., DC offset voltage) between the electrode pairs during the DC power-on process, the voltage peak value of the instantaneous change of the offset voltage at both ends of the electrode pairs (i.e., the instability peak voltage), and the dynamic change of the voltage at both ends of the electrode pairs (i.e., the changing voltage at both ends). After the DC power-on detection, the detection device can also apply alternating current to the electrode pairs to determine the ability of the electrode pairs to hinder the passage of current (i.e., AC impedance) and the stable potential difference (i.e., polarization electromotive force) generated on the electrode surface during the AC power-on process. Finally, the performance test results are determined by comparing the above-mentioned measured data with the preset standards. When the actual detected values ​​are compared with these preset standard values, if they are within the range, it means that they are qualified, and if they are out of the range, it means that they do not meet the standards. Since this embodiment uses DC and AC power to test DC offset voltage, unstable peak voltage, voltage change at both ends, AC impedance and polarization electromotive force, it avoids the situation where the traditional single function detection of electrode performance causes deviation or distortion of EEG signals, thereby solving the problem of EEG sensor electrode performance and safety, and greatly ensuring the signal quality of EEG signals.

[0070] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can be referred to the above introduction, and will not be repeated in the following. Figure 1 and Figure 2 , Figure 2 A schematic diagram of the flow chart provided for Embodiment 2 of the method for detecting performance of an electroencephalogram sensor of the present application.

[0071] In this example, step S10 includes steps S11 to S12:

[0072] Step S11: After direct current is applied to the electrode pair, the power-on time is recorded.

[0073] It should be noted that the power-on time is the time from the start of power-on to the end of power-on after a direct current is applied to the electrode pair of the EEG sensor.

[0074] Step S12: when the power-on time reaches a first preset time of a stable period, collecting a DC offset voltage after the first preset time, wherein the DC offset voltage in the preset standard is not greater than the first preset voltage.

[0075] It should be noted that the first preset time is the time that the EEG sensor electrode pair maintains a relatively static state and is not disturbed by other factors (ie, a stable period) after being connected by glue to glue.

[0076] Exemplarily, the first preset time may be 1 minute or 2 minutes, which is determined according to actual conditions and is not limited in this embodiment.

[0077] It should be noted that the first preset voltage is a limiting voltage at which the DC offset voltage measured by the EEG sensor electrode pair after a stabilization period is within the qualified standard.

[0078] Exemplarily, the first preset voltage may be 100 mV or 200 mV, which is determined according to actual conditions and is not limited in this embodiment.

[0079] In this embodiment, for ease of understanding, for example, the DC offset voltage in the preset standard can be limited to 100mV, and the DC offset voltage of a pair of disposable EEG sensor electrodes connected by glue to glue after a stabilization period of 1 minute should not be greater than 100mV. This can prevent the EEG monitor from causing saturation distortion under the influence of excessively high DC offset voltage.

[0080] In a feasible implementation, after step S11 of this embodiment, the step of: determining the frequency band during the DC power-on process when the power-on time reaches the first preset time of the stable period; collecting the instability peak voltage in the frequency band within a preset range, wherein the instability peak voltage in the preset standard is not greater than the second preset voltage, and the second preset voltage is less than the first preset voltage.

[0081] It should be noted that the frequency band is a frequency range. The preset range is the preset frequency range within which the EEG sensor responds to electrical signals and can generate corresponding voltage outputs.

[0082] Exemplarily, the frequency band of the preset range may be set to 0.15 Hz to 100 Hz or 1 Hz to 90 Hz, which may be determined according to actual conditions, and this embodiment does not impose any limitation on this.

[0083] It should be noted that the second preset voltage is a limiting voltage within a qualified range for the voltage peak value of the instantaneous change of the offset voltage at both ends of the EEG sensor electrode pair after the stabilization period.

[0084] Exemplarily, the second preset voltage may be 150 μV or 100 μV, which may be determined according to actual conditions, and is not limited in this embodiment.

[0085] In this embodiment, for ease of understanding, for example, the instability peak voltage in the preset standard can be limited to 150μV. After a one-minute stabilization period, the instability peak voltage generated in a pair of disposable EEG sensor electrodes connected by glue to glue in a frequency band of 0.15Hz to 100Hz (first-order frequency response) should not be greater than 150μV (peak-to-peak) in the following 5 minutes. This can avoid the generation of internal noise caused by instantaneous changes in offset voltage.

[0086] In another feasible implementation, in step S10 of this embodiment, the step of determining the changing voltage at both ends during the DC power-on process includes: applying DC power to the electrode pair according to a first preset current; collecting the changing voltage at both ends of the electrode pair within a preset time period, and the changing voltage at both ends in the preset standard is not greater than the first preset voltage.

[0087] It should be noted that the first preset current is a current set for collecting the voltage variation at both ends, for example, 200nA or 300nA, which can be determined according to actual conditions, and this embodiment does not limit this.

[0088] It should be noted that the preset time period is a time period set for accurately collecting the voltage changes at both ends. For example, the continuous collection time is 8 hours or 12 hours, which is not limited in this embodiment.

[0089] In this embodiment, for example, the first preset current can be limited to 200nA, and after applying a 200nA DC current to the disposable EEG sensor electrode pair connected by glue to glue, the duration is 8 hours. During the entire duration, the voltage change at both ends of the disposable EEG sensor electrode pair should not be greater than 100mV. Thus, through this bias current process, the compatibility tolerance of the EEG sensor electrode and the DC bias current can be tested to improve the safety of the EEG sensor.

[0090] In another feasible implementation manner, in step S20 of this embodiment, the step of determining the AC impedance during the AC power-on process includes:

[0091] Applying alternating current to the electrode pair according to a second preset current, and collecting impedance values ​​multiple times;

[0092] The impedance values ​​are averaged to determine the AC impedance, and the AC impedance in the preset standard does not exceed the preset resistance value.

[0093] It should be noted that the second preset current is a current set for collecting AC impedance, for example, 100 μA or 50 μA, which can be determined according to actual conditions and is not limited in this embodiment.

[0094] It should be noted that the impedance value is a measure of the resistance that the EEG sensor electrode pair presents to the alternating current under the action of the alternating current signal.

[0095] It should be noted that the preset resistance is the limited resistance of the EEG sensor electrode under the applied current, which is measured to prevent the AC signal from being within the qualified range, such as 1.5KΩ or 2KΩ, which can be determined according to actual conditions and is not limited in this embodiment.

[0096] In this embodiment, for example, the second preset current can be limited to 100μA, and the impedance average value of a pair of disposable EEG sensor electrodes connected by glue to glue should not exceed 1.5KΩ at 10Hz and an external current not exceeding 100μA (peak-to-peak). And the impedance of each individual disposable EEG sensor electrode pair connected by glue to glue should not exceed 2KΩ. Therefore, by limiting the impedance standard of the EEG sensor electrode pair, it is avoided that the current limiting resistor generates a lot of heat at the contact surface between the skin and the electrode, which may cause personal injury, and the safety detection of the EEG sensor electrode pair is improved.

[0097] In another feasible implementation, in step S20 of this embodiment, the step of determining the polarization electromotive force during the AC power-on process includes: discharging the capacitor in series with the electrode pair and the resistor, and recording the discharge time; when the discharge time reaches a second preset time, collecting the polarization electromotive force of the electrode pair, and the absolute value of the polarization electromotive force in the preset standard does not exceed the first preset voltage.

[0098] It should be noted that a capacitor is an electronic component that stores electric charge. Before discharging, the capacitor can be charged to 200V, and the specification of the capacitor can be a 10μF capacitor, which is not limited in this embodiment.

[0099] It should be noted that the discharge time is the time it takes for a capacitor to be discharged from the beginning to the end of the discharge process.

[0100] It should be noted that the second preset time is the time it takes for the capacitor to maintain a stable discharge state after it starts to discharge.

[0101] Exemplarily, the second preset time may be 5 seconds or 10 seconds, which is determined according to actual conditions and is not limited in this embodiment.

[0102] In this embodiment, for example, a 10μF capacitor charged to 200V can be used to discharge through a series circuit of a disposable EEG sensor electrode pair and a 100Ω resistor. At 5 seconds after the capacitor begins to discharge, the absolute value of the polarization electromotive force of the disposable EEG sensor electrode pair connected by glue to glue should not exceed 100mV. This can ensure the performance of the EEG sensor electrode defibrillation overload recovery.

[0103] Furthermore, within 30 seconds after discharge, the rate of change of the residual polarization electromotive force should not be greater than plus or minus 1mV / s. After conducting the above experiment according to this requirement, the 10Hz AC impedance of the disposable EEG sensor electrode pair should not be greater than 2KΩ. This can further ensure the performance of the EEG sensor electrode defibrillation overload recovery.

[0104] In this embodiment, for example, the DC offset voltage in the preset standard can be limited to 100mV. After a stabilization period of 1 minute for a pair of disposable EEG sensor electrodes connected by glue to glue, the DC offset voltage that appears should not be greater than 100mV. This can avoid the situation where the EEG monitor will cause saturation distortion under the influence of excessive DC offset voltage. Further, for example, the instability peak voltage in the preset standard can be limited to 150μV. After a stabilization period of 1 minute for a pair of disposable EEG sensor electrodes connected by glue to glue, the instability peak voltage generated in the frequency band of 0.15Hz to 100Hz (first-order frequency response) should not be greater than 150μV (peak-to-peak) within the next 5 minutes. This can avoid the generation of internal noise caused by instantaneous changes in the offset voltage. Further, for example, the first preset current can be limited to 200nA. After a DC current of 200nA is applied to the disposable EEG sensor electrode pair connected by glue to glue, the duration is 8 hours. The voltage change at both ends of the disposable EEG sensor electrode pair observed during the entire duration should not be greater than 100mV. Therefore, through this bias current process, the compatibility tolerance test of the EEG sensor electrode with the DC bias current can be achieved to improve the safety of the EEG sensor. Further, for example, the second preset current can be limited to 100μA, and the impedance average value of a pair of disposable EEG sensor electrodes connected by glue to glue should not exceed 1.5KΩ at 10Hz and an external current not exceeding 100μA (peak-to-peak). And the impedance of each individual glue-to-glue disposable EEG sensor electrode pair should not exceed 2KΩ. Therefore, by limiting the impedance standard of the EEG sensor electrode pair, it is avoided that the current limiting resistor generates a lot of heat at the contact surface between the skin and the electrode, causing personal injury, and improving the safety detection of the EEG sensor electrode pair. Furthermore, for example, a 10μF capacitor charged to 200V can be used to discharge through a series circuit of a disposable EEG sensor electrode pair and a 100Ω resistor. At 5 seconds after the capacitor begins to discharge, the absolute value of the polarization electromotive force of the disposable EEG sensor electrode pair connected by glue to glue should not exceed 100mV. This can ensure the performance of EEG sensor electrode defibrillation overload recovery. Thus, the above-mentioned AC impedance, DC offset voltage, composite offset instability and internal noise, bias current tolerance and defibrillation overload recovery are used to ensure the safety and performance of the EEG sensor.

[0105] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the EEG sensor performance detection method of the present application. More simple transformations based on this technical concept are all within the scope of protection of the present application.

[0106] This application also provides a device for detecting the performance of an electroencephalogram sensor. Figure 3 , Figure 3This is a schematic diagram of the module structure of the EEG sensor performance detection device according to the embodiment of the present application; the EEG sensor performance detection device comprises:

[0107] A DC data module 301 is used to apply DC power to the electrode pair after the electrode pair of the EEG sensor is connected to each other, and determine the DC offset voltage, the instability peak voltage and the voltage change at both ends during the DC power-on process;

[0108] The AC data module 302 is used to perform AC power supply to the electrode pair and determine the AC impedance and polarization electromotive force during the AC power supply process;

[0109] The performance determination module 303 is used to determine the performance detection result by comparing the DC offset voltage, the instability peak voltage, the voltage variation at both ends, the AC impedance and the polarization electromotive force with a preset standard.

[0110] In this embodiment, the DC data module 301 is also used to record the power-on time after the electrode pair is powered on by DC; when the power-on time reaches a first preset time of a stable period, the DC offset voltage after the first preset time is collected, wherein the DC offset voltage in the preset standard is not greater than the first preset voltage.

[0111] Furthermore, the DC data module 301 is also used to determine the frequency band in the DC power-on process when the power-on time reaches a first preset time of the stable period; in the frequency band within a preset range, collect the instability peak voltage, wherein the instability peak voltage in the preset standard is not greater than a second preset voltage, and the second preset voltage is less than the first preset voltage.

[0112] Furthermore, the DC data module 301 is also used to apply DC power to the electrode pair according to a first preset current; collect the voltage change at both ends of the electrode pair within a preset time period, and the voltage change at both ends in the preset standard is not greater than the first preset voltage.

[0113] Furthermore, the AC data module 302 is also used to conduct AC power to the electrode pair according to a second preset current, collect impedance values ​​multiple times, average the impedance values, and determine the AC impedance. The AC impedance in the preset standard does not exceed the preset resistance value.

[0114] Furthermore, the AC data module 302 is also used to discharge the capacitor in series with the electrode pair and the resistor, and record the discharge time; when the discharge time reaches a second preset time, the polarization electromotive force of the electrode pair is collected, and the absolute value of the polarization electromotive force in the preset standard does not exceed the first preset voltage.

[0115] Other embodiments or specific implementations of the EEG sensor performance detection device of the present application can refer to the above-mentioned method embodiments and will not be described in detail here.

[0116] The EEG sensor performance detection device provided by the present application adopts the EEG sensor performance detection method in the above-mentioned embodiment, which can solve the technical problems that the traditional electrode performance detection is generally a single function detection, which will cause the EEG signal to deviate or distort, and also reduce the safety of the use of EEG sensor electrodes due to various problems in the use of electrodes. Compared with the prior art, the beneficial effects of the EEG sensor performance detection device provided by the present application are the same as the beneficial effects of the EEG sensor performance detection method provided by the above-mentioned embodiment, and the other technical features in the EEG sensor performance detection device are the same as the features disclosed in the above-mentioned embodiment method, which will not be repeated here.

[0117] The present application provides an EEG sensor performance detection device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the EEG sensor performance detection method in the above-mentioned embodiment one.

[0118] Reference below Figure 4 , Figure 4 The device structure diagram of the hardware operating environment involved in the EEG sensor performance detection method in the embodiment of the present application shows a schematic diagram of the structure of the EEG sensor performance detection device suitable for implementing the embodiment of the present application. The EEG sensor performance detection device in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 4 The EEG sensor performance detection device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0119] like Figure 4As shown, the EEG sensor performance detection device may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. Various programs and data required for the operation of the EEG sensor performance detection device are also stored in RAM1004. The processing device 1001, ROM1002 and RAM1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 can allow the EEG sensor performance detection device to communicate with other devices wirelessly or by wire to exchange data. Although the figure shows an EEG sensor performance detection device with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have instead.

[0120] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0121] The EEG sensor performance detection device provided by the present application adopts the EEG sensor performance detection method in the above embodiment, which can solve the technical problems that the traditional electrode performance detection is generally a single function detection, which will cause EEG signals to deviate or distort, and reduce the safety of the use of EEG sensor electrodes due to various problems in the use of electrodes. Compared with the prior art, the beneficial effects of the EEG sensor performance detection device provided by the present application are the same as the beneficial effects of the EEG sensor performance detection method provided by the above embodiment, and the other technical features of the EEG sensor performance detection device are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0122] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0123] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0124] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, and the computer-readable program instructions are used to execute the EEG sensor performance detection method in the above-mentioned embodiment.

[0125] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0126] The above-mentioned computer-readable storage medium may be included in the EEG sensor performance detection device; or it may exist independently without being assembled into the EEG sensor performance detection device.

[0127] The above-mentioned computer-readable storage medium carries one or more programs. When the above-mentioned one or more programs are executed by the EEG sensor performance detection device, the EEG sensor performance detection device enables: after the electrode pairs of the EEG sensor are connected to each other by glue, to apply direct current to the electrode pairs, and determine the DC offset voltage, instability peak voltage and voltage variation at both ends during the DC power-on process; to apply alternating current to the electrode pairs, and determine the AC impedance and polarization electromotive force during the AC power-on process; to compare the DC offset voltage, the instability peak voltage, the voltage variation at both ends, the AC impedance and the polarization electromotive force with preset standards to determine the performance detection result.

[0128] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0129] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0130] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0131] The readable storage medium provided by the present application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned EEG sensor performance detection method, and can solve the technical problems that the traditional electrode performance detection is generally a single function detection, which will cause EEG signals to deviate or distort, and also reduce the safety of the use of EEG sensor electrodes due to various problems in the use of electrodes. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided by the present application are the same as the beneficial effects of the EEG sensor performance detection method provided by the above-mentioned embodiment, and will not be repeated here.

[0132] The present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned EEG sensor performance detection method when executed by a processor.

[0133] The computer program product provided by the present application can solve the technical problem that due to various problems in the use of electrodes, the traditional electrode performance detection is generally a single function detection, which will cause deviation or distortion of EEG signals and reduce the safety of the use of EEG sensor electrodes. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the EEG sensor performance detection method provided in the above embodiment, which will not be repeated here.

[0134] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A method for detecting performance of an electroencephalogram sensor, characterized in that: The method includes: After the electrodes of the EEG sensor are connected to each other, direct current is applied to the electrodes to determine the direct current offset voltage, the instability peak voltage and the voltage variation at both ends during the direct current application process; Applying AC power to the electrode pair, and determining AC impedance and polarization electromotive force during the AC power application process; The performance test result is determined by comparing the DC offset voltage, the instability peak voltage, the voltage variation at both ends, the AC impedance and the polarization electromotive force with a preset standard.

2. The method according to claim 1, characterized in that The step of determining the DC offset voltage during the DC power-on process includes: After direct current is applied to the electrode pair, the power-on time is recorded; When the power-on time reaches a first preset time of a stable period, a DC offset voltage after the first preset time is collected, wherein the DC offset voltage in the preset standard is not greater than the first preset voltage.

3. The method according to claim 2, characterized in that After the step of recording the power-on time after the electrode pair is powered by direct current, the method further comprises: When the power-on time reaches a first preset time of a stable period, determining a frequency band during the direct current power-on process; In a frequency band within a preset range, an instability peak voltage is collected, wherein the instability peak voltage in the preset standard is not greater than a second preset voltage, and the second preset voltage is less than the first preset voltage.

4. The method according to claim 2, characterized in that The steps for determining the voltage change at both ends during the DC power-on process include: Applying direct current to the electrode pair according to a first preset current; The voltage variation between the two ends of the electrode pair within a preset time period is collected, and the voltage variation between the two ends in the preset standard is not greater than the first preset voltage.

5. The method according to any one of claims 1 to 4, characterized in that The step of determining the AC impedance during the AC power-on process includes: Applying alternating current to the electrode pair according to a second preset current, and collecting impedance values ​​multiple times; The impedance values ​​are averaged to determine the AC impedance, and the AC impedance in the preset standard does not exceed the preset resistance value.

6. The method according to any one of claims 2 to 4, characterized in that The steps to determine the polarization electromotive force during AC power flow include: discharging a capacitor in series with the electrode pair and the resistor, and recording the discharge time; When the discharge time reaches a second preset time, the polarization electromotive force of the electrode pair is collected, and the absolute value of the polarization electromotive force in the preset standard does not exceed the first preset voltage.

7. An electroencephalogram sensor performance detection device, characterized in that: The device comprises: A DC data module is used to apply DC power to the electrode pair after the electrode pair of the EEG sensor is connected to each other, and determine the DC offset voltage, the instability peak voltage and the voltage change at both ends during the DC power-on process; An AC data module, used to conduct AC power to the electrode pair and determine the AC impedance and polarization electromotive force during the AC power-on process; The performance determination module is used to determine the performance detection result by comparing the DC offset voltage, the instability peak voltage, the voltage variation at both ends, the AC impedance and the polarization electromotive force with a preset standard.

8. An electroencephalogram sensor performance detection device, characterized in that: The device comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the method for detecting performance of an electroencephalogram sensor according to any one of claims 1 to 6.

9. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the EEG sensor performance detection method according to any one of claims 1 to 6 are implemented.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the method for detecting performance of an electroencephalogram sensor according to any one of claims 1 to 6 are implemented.

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