Non-invasive bioelectric electrode performance tester

Abstract

The invention discloses a non-invasive bioelectric electrode performance tester which comprises a test host and a liquid circulation system. Wherein the test host mainly comprises a device operation table used for installing a skin simulator and an acquisition module to realize the overall performance test of a tested device; the skin simulator is used for simulating physiological electric signals generated in a human scalp and body skin hot and humid environment; the electrical cabinet is used for installing electrical equipment of the signal acquisition system, the electrochemical acquisition system and the device motion platform control system and has an electromagnetic shielding function; the signal acquisition system is used for generating and acquiring a multi-mode signal; the electrochemical acquisition system is used for acquiring an electrochemical signal in a device test; and the device motion platform simulates the motion states of the device in different motion states of the human body. According to the invention, multi-modal physiological signals generated in a humid and hot environment of human skin can be simulated, and the overall performance test of dynamic / static electric signals and chemical signals of the bioelectric electrode can be realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of non-invasive bioelectric electrode performance detection, and particularly relates to a non-invasive bioelectric electrode performance tester. Background Art

[0002] With the wide application of bioelectric signal detection technology in fields such as medical health and human-computer interaction, the R & D demand for high-performance bioelectric electrodes is becoming increasingly urgent. At present, although electrodes such as electrocardiogram (ECG), electroencephalogram (EEG), and electromyogram (EMG) in the market have formed a commercial product system, there are still technical bottlenecks such as unstable signal quality and significant individual adaptability differences in actual applications. Traditional electrode performance evaluation mostly uses the human body measurement method, which has problems such as long test cycles, uncontrollable environmental interference, and poor repeatability, and it is difficult to establish a standardized quantitative evaluation system.

[0003] In the prior art, Chinese Patent CN108693228A designed a wearable electrocardiogram electrode performance evaluation test platform, which focused on solving the problem of dynamic noise testing of electrocardiogram signals between the electrode and the simulated skin, but did not involve the simulation and evaluation of different bioelectric signal characteristics. Chinese Patent CN117398102A designed a physiological electrode performance test system and method for simulating different human motion states, but the test indicators were limited to electrical signal parameters, lacking the evaluation of the electrochemical parameters and overall performance of the electrode.

[0004] The current technology mainly has the following defects: (1) The test system is mostly designed for a single type of electrode, lacking the ability to simulate multi-modal signals applicable to different frequency bands (ECG 0.05 - 150Hz, EEG 0.5 - 100Hz, EMG 10 - 500Hz); (2) The existing evaluation system does not fully consider the dynamic interference factors in the actual application scenario, including complex working conditions such as skin-electrode interface motion artifacts, temperature changes, and sweat secretion; (3) The degree of automation in the test process is insufficient, lacking the overall evaluation of different performance parameters of the electrode, which affects the test efficiency and objectivity.

[0005] Especially in the context of the rapid development of new flexible electrodes and dry electrodes, the existing test methods are difficult to meet the evaluation requirements of new indicators such as the characteristics of the electrode-skin interface and long-term wearing stability for material innovation. Therefore, there is an urgent need to establish a standardized test system that can simulate the real physiological environment and support automatic multi-dimensional parameter analysis to accelerate the R & D process of high-performance bioelectric electrodes. Summary of the Invention

[0006] The object of the present invention is to overcome the deficiencies of the prior art and provide a non-invasive bioelectric electrode performance tester, which can realize multi-modal physiological signal simulation in a humid and hot skin environment and during exercise, and in particular, a shielding design is carried out for weak signals such as electroencephalogram to realize the overall evaluation of the electrical and chemical signals of non-invasive bioelectric electrodes, and can solve multiple technical problems existing in the prior art.

[0007] The present invention is realized through the following technical solutions:

[0008] A non-invasive bioelectric electrode performance tester, which is composed of a test host and a liquid circulation system. The test host mainly includes:

[0009] A device operation table for installing the skin simulator and the acquisition end of the signal acquisition system to realize the overall performance test of the device under test;

[0010] A skin simulator is installed on the device operation table and connected to the liquid circulation system, and is used to simulate the physiological electrical signals generated by the human skin in a humid and hot environment. It has a module for simulating the humid and hot state of the human skin and a module for simulating the humid and hot state of the head. The skin simulator can be replaced according to different test environments;

[0011] An electrical cabinet is used to install the electrical equipment of the signal acquisition system, the electrochemistry acquisition system and the device motion platform control system, and has an electromagnetic shielding function to prevent signal crosstalk inside the system;

[0012] A signal acquisition system is installed in the electrical cabinet and is used to generate and acquire multi-modal signals in device testing, and can acquire DC signals and AC signals in device testing;

[0013] An electrochemistry acquisition system is installed in the electrical cabinet and is used to acquire electrochemistry signals in device testing;

[0014] A device motion platform is installed in the electrical cabinet and realizes the three-dimensional motion of the device under test through a robotic arm, simulates the activity state of the device under different human motion states, including the acquisition performance analysis in the motion state and the static state, and realizes the systematic evaluation of the device.

[0015] Furthermore, the device operation table includes a skin simulator support, a skin simulator body, a pressure adjustment system, and a signal transfer board. Among them, the skin simulator support is installed on the bottom plate, the skin simulator body is installed on the skin simulator support, and the skin simulator body can be disassembled and installed on the skin simulator support by horizontal sliding. The pressure adjustment system is installed on the sliding seat of the skin simulator support, and the pressure adjustment system can adjust the height and pressure on the skin simulator support by vertical sliding. The signal transfer board is installed on the shielding partition for realizing the transfer of multi-modal signals in the signal acquisition system.

[0016] Furthermore, the pressure adjustment system includes a handwheel adjustment mechanism, a pressure acquisition module, and a device clamping mechanism. The handwheel adjustment mechanism can realize fine adjustment of the Z-axis displacement of the pressure acquisition module. The pressure acquisition module realizes signal acquisition of the pressure between the device and the skin-like interface. The device clamping mechanism realizes the fixation and signal transmission of the device under test. The device clamping mechanism can be replaced according to the sizes of different devices under test.

[0017] Furthermore, the pressure acquisition module includes a pressure sensor, a sliding structure, and a support component. Among them, the pressure sensor is installed in the support component. The force-receiving end of the pressure sensor is connected to the sliding block of the sliding structure. The sliding block is connected to the device clamping mechanism. The sliding block makes a linear reciprocating motion on the slide rail by changing the contact pressure. Different pressure values are generated on the force-receiving end of the pressure sensor during the movement of the sliding block, and the pressure sensor acquires different pressure signals.

[0018] Furthermore, the skin simulator has a skin surface layer module and a skin storage module. The skin surface layer module is encapsulated on the upper and lower end faces of the skin storage module to simulate the upper and lower skin layers of the human body. The skin surface layer module has the functions of simulating human skin sweating and constant temperature. The skin storage module has the function of simulating the internal humid and hot environment of the human body. An interface for connecting the liquid circulation system is left on the outer wall of the skin storage module for realizing the circulating flow function of the internal liquid environment of the skin.

[0019] Furthermore, the skin surface layer module has a replaceable function and can replace the skin surface layer module with different sweating pore diameters according to different test requirements to realize the control of different sweating amounts. The skin simulator has electrode mounting holes for mounting reference electrodes for introducing bioelectric signals.

[0021] Furthermore, the skin surface layer module includes a module for simulating the humid and hot state of human skin and a module for simulating the humid and hot state of the head, and can construct a test environment for head physiological signals and body physiological signals according to different test states.

[0022] Furthermore, the electrical cabinet includes a control electrical module, a signal acquisition system, an electrochemistry acquisition system, and a device movement platform. Among them, the control electrical module is installed on the bottom plate and is enclosed and protected by an electromagnetic shielding cover for the electrical module externally to reduce the electromagnetic interference of the electrical system on physiological signals. The signal acquisition system is installed on the chassis panel far away from the control electrical module, and the output and acquisition ports of the physiological signals are led to the device operation table through a transfer board at the other end. The electrochemistry acquisition system is installed on the bottom plate, and the acquisition cable is led out to the device operation table through a shielding partition. The device movement platform is installed on the bottom plate through a device movement platform bracket, and the Y-axis robotic arm of the device movement platform is led out to the device operation table through a shielding partition.

[0023] Furthermore, the control electrical module includes a PLC module, a driver module, an acquisition card module, and a power supply module. The input end of the PLC module is connected to an external host computer, and the output end of the PLC module is connected to the input end of the driver module to transmit commands to the driver. The output end of the driver is connected to the X-axis motor and the Y-axis motor to control the movement of the robotic arm. The acquisition card module is connected to the pressure regulation system to collect pressure signals during the device test. The power supply module supplies power to the entire test system.

[0024] Furthermore, the signal acquisition system includes a physiological signal generating device and a signal acquisition device. The physiological signal generating device is installed on the right side panel of the chassis. Among them, the control panel of the physiological signal generating device is installed on the outside of the right side panel of the chassis, and the signal interface of the physiological signal generating device is installed on the inside of the right side panel of the chassis. The signal acquisition device is installed on one side of the shielding partition electrical cabinet and is protected externally by a shielding cover to reduce the interference of the internal electromagnetic noise of the chassis on the acquisition accuracy.

[0025] Furthermore, the physiological signal generating device can generate electroencephalogram signals, electrocardiogram signals, electromyogram signals, square wave signals, sine wave signals, and triangular wave signals. The physiological signal generating device has a setting interface for signal amplitude, frequency, and gain.

[0026] Furthermore, the output end of the physiological signal generating device is connected to the input end of the signal transfer board, and the output end of the signal transfer board is connected to the reference electrode in the corresponding skin simulator through a wire.

[0027] Furthermore, the signal acquisition device can realize the acquisition function of DC signals and AC signals. The signal acquisition device has multiple acquisition channels, including a standard signal acquisition channel and a device signal acquisition channel. During the test, the standard signal acquisition channel is connected to the corresponding interface of the physiological signal generating device, and the device signal acquisition channel is connected to the device interface. Finally, the signal acquisition device transmits the signals of each channel to the host computer for processing.

[0028] Furthermore, the electrochemistry acquisition system can acquire the open-circuit voltage, impedance spectrum, cyclic voltammetry curve, and chronoamperometry curve of the device.

[0029] Furthermore, the device motion platform includes a device motion platform bracket, an X-axis robotic arm, a Y-axis robotic arm, an X-axis motor, and a Y-axis motor, and can achieve mechanical motion in a two-dimensional plane. Among them, the X-axis robotic arm is installed on the device motion platform bracket, the X-axis motor realizes the reciprocating motion of the X-axis sliding component through the X-axis transmission mechanism, the Y-axis robotic arm is vertically installed on the sliding component of the X-axis robotic arm, the Y-axis motor is installed at the end of the Y-axis robotic arm, and the Y-axis motor realizes the reciprocating motion of the Y-axis sliding component through the Y-axis transmission mechanism. A Y-axis extended robotic arm is installed on the Y-axis sliding component, and the Y-axis extended robotic arm is led out to the device operation table through the bellows mesh outlet on the shielding partition as the mounting seat of the pressure regulation system. The pressure regulation system realizes motion in the Z-axis direction through the vertical sliding mechanism; the extended robotic arm can realize motion in the X-axis and Y-axis directions through the X-axis transmission mechanism and the Y-axis transmission mechanism.

[0030] Furthermore, the liquid circulation system is used to complete the circulating transportation of liquid substances in the skin simulator and control the skin sweating amount through the skin simulator, and includes an upper liquid storage tank, a lower liquid storage tank, a flow meter, a water pump, a flow rate regulating device, a liquid circulation system controller, and a power supply. Among them, the lower liquid storage tank is installed on the lower layer plane of the liquid circulation system. The lower liquid storage tank is provided with a water inlet and a water outlet. The water inlet realizes the replenishment of liquid substances in the liquid storage tank, and the water outlet is connected to the water inlet of the water pump through a water pipe. The water outlet of the water pump is connected to the water inlet of the flow meter, the water outlet of the flow meter is connected to the water inlet of the upper liquid storage tank, the water outlet of the upper liquid storage tank is connected to the water inlet of the skin simulator through a water pipe passing through the liquid circulation inlet hole, the water outlet of the skin simulator is connected to the water inlet of the flow rate regulating device through a water pipe passing through the liquid circulation outlet hole, and the water outlet of the flow rate regulating device is connected to the lower liquid storage tank through a water pipe. The control and test of liquid circulation are realized through the above connection method.

[0031] Compared with the prior art, the beneficial effects of the non-invasive bioelectric electrode performance tester provided by the present invention include:

[0032] 1. The signal acquisition system realizes the simulation function of multi-modal physiological electrical signals, supports the dynamic simulation of signals in different frequency bands such as electrocardiogram (0.05 - 150 Hz), electroencephalogram (0.5 - 100 Hz), and electromyogram (10 - 500 Hz), and is compatible with the multi-modal test requirements of wet, dry, and flexible electrodes;

[0033] 2. Combining the functions of the skin simulator and the device motion platform, a multi-physical field coupling interference environment is constructed to simulate a more realistic test state of the human skin's humid and hot environment in a moving state;

[0034] 3. The multi-dimensional parameter tests of electrode electrical signals (such as signal-to-noise ratio, noise, signal attenuation amplitude), electrochemical signals (impedance spectrum and open circuit voltage), and pressure signals are realized through the signal acquisition system, electrochemical acquisition system, and pressure acquisition module of the device motion platform, improving the test efficiency and objectivity of the electrode;

[0035] 4. It provides a high-precision and high-efficiency test tool for the research and development and testing of electrodes, and at the same time supports the rapid verification and optimization iteration of new electrode technologies. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and other objects, features, and advantages of the present invention will become more obvious by describing the embodiments of the present invention in more detail in conjunction with the drawings. The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention and do not constitute a limitation to this application. In the drawings, the same reference numerals generally represent the same components or steps.

[0037] Figure 1 is an overall schematic diagram of a non-invasive bioelectric electrode performance tester shown according to an exemplary embodiment;

[0038] Figure 2 is a schematic diagram of the test host of a non-invasive bioelectric electrode performance tester shown according to an exemplary embodiment;

[0039] Figure 3 is a schematic diagram of the internal structure of the test host of a non-invasive bioelectric electrode performance tester shown according to an exemplary embodiment;

[0040] Figure 4 is a schematic diagram of the device operation table of the test host of a non-invasive bioelectric electrode performance tester shown according to an exemplary embodiment;

[0041] Figure 5 is a schematic diagram of the electrical cabinet of the test host of a non-invasive bioelectric electrode performance tester shown according to an exemplary embodiment;

[0042] Figure 6 is a side view schematic diagram of the test host of a non-invasive bioelectric electrode performance tester shown according to an exemplary embodiment;

[0043] Figure 7 is a schematic diagram of the liquid circulation system of a non-invasive bioelectric electrode performance tester shown according to an exemplary embodiment;

[0044] In the figure: 1 is a test host; 11 is a chassis cover; 12 is an electromagnetic shielding film; 13 is a base plate; 14 is a chassis panel; 1401 is a liquid circulation inlet hole; 1402 is a liquid circulation outlet hole; 1403 is a heat dissipation air inlet; 1404 is a communication plug board; 15 is a fan outlet; 16 is a physiological signal generating device; 17 is a device operation table; 1701 is a skin simulator support 1; 1702 is a skin simulator support 2; 1703 is a sliding seat of the skin simulator support; 1704 is a pressure acquisition module 1; 1705 is a pressure acquisition module 2; 1706 is a pressure acquisition module 3; 1707 is a device clamping mechanism 1; 1708 is a device clamping mechanism 2; 1709 is a device clamping mechanism 3; 1710 is a module for simulating the humid and hot state of the head; 1711 is a module for simulating the humid and hot state of the human skin; 1712 is a reference electrode; 1713 is a skin surface layer module; 1714 is a signal transfer board; 1715 is a handwheel adjustment structure; 1716 is a skin simulator mounting seat; 18 is a shielding partition; 19 is an electrical cabinet; 1901 is a device movement platform support; 1902 is an electromagnetic shielding cover for the electrical module; 1903 is an electrochemical acquisition system; 1904 is a storage layer; 1905 is a device movement platform installation layer; 1906 is an X-axis motor; 1907 is an X-axis robotic arm; 1908 is a Y-axis transmission mechanism; 1909 is a Y-axis robotic arm; 1910 is a Y-axis extended robotic arm; 1911 is an accordion net outlet; 1912 is a signal acquisition device; 1913 is a wire trough; 2 is a liquid circulation system; 21 is a base plate of the liquid circulation system; 22 is a flow meter; 23 is a water pump; 24 is a flow rate adjustment device; 25 is a scale; 2601 is a lower liquid storage tank; 2602 is an upper liquid storage tank; 27 is a connecting pipe; 28 is a power supply; 29 is a fan. Detailed implementation manners

[0045] The embodiments of the present invention will be described in detail below. The exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments of the present invention. It should be understood that the present invention is not limited by the exemplary embodiments described herein.

[0046] As Figure 1 、 Figure 2 and Figure 3As shown in the figure, the non-invasive bioelectric electrode performance tester of the present invention comprises a test mainframe 1 and a liquid circulation system 2. The test mainframe is composed of a chassis cover 11, an electromagnetic shielding film 12, a bottom plate 13, a chassis panel 14, a fan outlet 15, a physiological signal generating device 16, a device operation table 17, a shielding partition 18 and an electrical cabinet 19. The device operation table 17 is used to install the skin simulator and the acquisition end of the signal acquisition system to realize the overall performance test of the device under test. The skin simulator is installed on the device operation table 17 and connected to the liquid circulation system 2. It is used to simulate the physiological electrical signals generated by the human skin in a humid and hot environment, and has a module 1711 for simulating the humid and hot state of the human skin and a module 1710 for simulating the humid and hot state of the head. The skin simulator can be replaced according to different test environments. The electrical cabinet 19 is used to install the electrical equipment of the signal acquisition system, the electrochemistry acquisition system 1903 and the device motion platform control system, and has an electromagnetic shielding function to prevent signal crosstalk inside the system. The signal acquisition system is installed in the electrical cabinet 19 and is used to generate and acquire multi-modal signals in device testing, and can acquire DC signals and AC signals in device testing. The electrochemistry acquisition system 1903 is installed in the electrical cabinet 19 and is used to acquire electrochemistry signals in device testing. The device motion platform is installed in the electrical cabinet 19 and realizes the three-dimensional motion of the device under test through a robotic arm, simulating the activity state of the device under different human motion states, including the acquisition performance analysis in the motion state and the static state, and realizing the systematic evaluation of the device. The liquid circulation system 2 includes a liquid circulation system bottom plate 21, a flow meter 22 and a water pump 23, which are used to complete the cyclic transportation of liquid substances in the skin simulator and control the skin sweating amount through the skin simulator.

[0047] As Figure 4 shown, the device operation table 17 includes a skin simulator support 11701, a skin simulator support 21705, a skin simulator body, a pressure adjustment system and a signal transfer board 1714. Among them, the skin simulator supports 1701 and 1702 are installed on the bottom plate 13, and the skin simulator body is installed on the tops of the skin simulator supports 1701 and 1702 by means of a sliding slot. The skin simulator body can be disassembled and installed on the skin simulator supports 1701 and 1702 by horizontal sliding. The pressure adjustment system is installed on the skin simulator support sliding seat 1703, and the pressure adjustment system can adjust the vertical height and pressure on the skin simulator supports 1701 and 1702 through the skin simulator support sliding seat 1703. This adjustment method is used for large-range vertical movement adjustment to facilitate providing space for the installation of the skin simulator body. The signal transfer board 1714 is installed on the shielding partition 18 and is used to realize the transfer of different physiological signals in the signal acquisition system.

[0048] In this embodiment, the pressure regulation system includes a handwheel adjustment structure 1715, a pressure acquisition module 1704, and a device clamping mechanism 1707. The handwheel adjustment structure 1715 can achieve fine adjustment of the Z-axis displacement of the pressure acquisition module 1704. After the sliding seat 1703 of the skin simulator bracket moves a large range to the interface adjacent to the skin, the handwheel adjustment structure 1715 is finely adjusted to achieve accurate acquisition of the pressure signal. The pressure acquisition module 1704 can continuously acquire the pressure signals of the device and the skin-mimicking interface, and the device clamping mechanism 1707 fixes the device under test.

[0049] It should be noted that the device clamping mechanism 1707 in this embodiment can be replaced according to the sizes of different devices under test. When testing button electrocardiogram electrodes, the device clamping mechanism 1707 is a mounting base with a button female buckle; when testing gel electroencephalogram electrodes, the device clamping mechanism 1707 can be a mounting base with a three-jaw fixing seat.

[0050] In this embodiment, the pressure acquisition module 1704 includes a pressure sensor, a sliding structure, and a support component. The pressure sensor is installed in the support component. The force-receiving end of the pressure sensor is connected to the sliding block of the sliding structure. The sliding block is connected to the device clamping mechanism. The sliding block makes a linear reciprocating motion on the slide rail due to the change of the interface pressure. Different pressure values are generated on the force-receiving end of the pressure sensor during the movement of the sliding block. The range of the pressure sensor is greater than 500 cN, and the resolution is 1 cN.

[0051] In this embodiment, the above-mentioned skin simulator body includes a module 1710 for simulating the hot and humid state of the head, a module 1711 for simulating the hot and humid state of the human skin, and a reference electrode 1712. The module 1710 for simulating the hot and humid state of the head is used to simulate the hot and humid skin state of the human head with hair. A heating component and a liquid evaporation component are arranged inside it. The internally evaporated hot and humid gas is conducted to the surface of the test scalp through the skin surface module 1713. The module 1711 for simulating the hot and humid state of the human skin is used to simulate the hot and humid state of the human skin. A heating component and a liquid evaporation component are arranged inside it. The internally evaporated hot and humid gas is conducted to the surface of the test skin through the skin surface module 1713.

[0052] In this embodiment, the simulator bodies of the above-mentioned simulated head humid and hot state module 1710 and simulated human skin humid and hot state module 1711 are both composed of a skin surface layer module 1713 and a skin storage module. The skin surface layer module is encapsulated on the upper and lower end faces of the skin storage module to simulate the upper and lower skin layers of the human body. The skin surface layer module 1713 has the functions of simulating human skin sweating and constant temperature. The skin surface layer module can select PVDF permeable membranes with pore sizes of 0.1, 0.8, or 1.2 μm, and the skin surface layer module 1713 with different sweating holes can be replaced according to different test requirements to simulate the changes in different skin sweating amounts. The skin storage module has the function of simulating the internal humid and hot environment of the human body. An interface for connecting the liquid circulation system 2 is provided on the outer wall of the skin storage module to realize the circulating flow function of the internal liquid environment of the skin. The skin simulator has an electrode mounting hole for mounting the reference electrode 1712 for introducing bioelectric signals, and the reference electrode 1712 selects an Ag / AgCl reference electrode.

[0053] It should be noted that the above-mentioned skin surface layer module 1713 includes a simulated human skin humid and hot state module 1711 and a simulated head humid and hot state module 1710, which can create a test environment for head physiological signals and body physiological signals according to different test states, and can also replace other skin simulators of the same form according to specific test requirements.

[0054] In this embodiment, the above-mentioned signal transfer board 1714 includes a physiological signal transfer area and a signal acquisition area. The physiological signal transfer area is provided with transfer interfaces for electroencephalogram signals, electrocardiogram signals, electromyogram signals, square wave signals, sine wave signals, and triangular wave signals. The signal acquisition area includes transfer interfaces for CH1, CH2, CH3, CH4, CH5, CH6, CH7, and CH8 acquisition channels.

[0055] As Figure 3 and Figure 5 shown, the electrical cabinet 19 includes a control electrical module, a signal acquisition system, an electrochemistry acquisition system 1903, and a device movement platform. Among them, the control electrical module is installed on the lower layer on the left side of the bottom plate 13, and is enclosed and protected by an electrical module electromagnetic shielding cover 1902 externally to reduce the electromagnetic interference of the electrical system on physiological signals. The signal acquisition system is installed in the upper left corner of the shielding partition 18 far away from the control electrical module. The output ports and acquisition ports of physiological signals are led to the front panel of the signal transfer board 1714 of the device operation table 17 through the signal transfer board 1714 at the front end. The electrochemistry acquisition system 1903 is installed on the lower layer on the right side of the bottom plate 13, and the acquisition cable is led out to the device operation table 17 through the shielding partition 18. The device movement platform is installed on the bottom plate 13 through a device movement platform bracket 1901, and the Y-axis robotic arm 1909 of the device movement platform is led out to the device operation table 17 through the shielding partition 18.

[0056] In this embodiment, the above-mentioned device moving platform includes a device moving platform bracket 1901, an X-axis robotic arm 1907, a Y-axis robotic arm 1909, an X-axis motor 1906 and a Y-axis motor, which can achieve mechanical movement in a two-dimensional plane. Among them, the X-axis robotic arm 1907 is installed on the device moving platform bracket 1901, and the X-axis motor 1906 realizes the reciprocating movement of the X-axis sliding assembly through the X-axis transmission mechanism. The movement stroke of the X-axis robotic arm 1907 is 300 mm. The Y-axis robotic arm 1909 is vertically installed on the sliding assembly of the X-axis robotic arm 1907. A Y-axis motor is installed at the end of the Y-axis robotic arm 1909. The Y-axis motor realizes the reciprocating movement of the Y-axis sliding assembly through the Y-axis transmission mechanism 1908. The movement stroke of the Y-axis robotic arm 1909 is 300 mm. A Y-axis extended robotic arm 1910 is installed on the Y-axis sliding assembly. The Y-axis extended robotic arm 1910 is led out to the device operation table 17 through the bellows net outlet 1911 on the shielding partition 18 and serves as the mounting base of the pressure regulating system. The pressure regulating system realizes movement in the Z-axis direction through the vertical sliding mechanism. At the same time, the pressure regulating system installed on the Y-axis extended robotic arm 1910 can realize motion control in a three-dimensional space through the X-axis transmission mechanism, the Y-axis transmission mechanism 1908 and the Z-axis slide rail.

[0057] In this embodiment, a PLC module, a driver module, a data acquisition card module and a power supply module are installed in the above-mentioned control electrical module. The input end of the PLC module is connected to an external host computer. The external host computer controls the PLC through instructions. The output end of the PLC module is connected to the input end of the driver module to transmit instructions to the driver. The output end of the driver is connected to the X-axis motor 1906 and the Y-axis motor to control the movement of the robotic arm. Thus, by changing the movement speed, time and trajectory through the host computer software, automatic movement control of the device moving platform can be realized, and movement forms such as linear reciprocating movement, circular arc movement and irregular curve movement can be realized on the simulated skin surface.

[0058] In this embodiment, the above-mentioned data acquisition card module is connected to the pressure regulating system and is used to collect the pressure change signal during the device test. A certain amount of pressure value can be pre-applied to the test electrode through the handwheel adjustment structure 1715, and the performance parameters of the electrode under different basic pressures can be measured.

[0059] In this embodiment, the above-mentioned signal acquisition system includes a physiological signal generating device 16 and a signal acquisition device 1912. The physiological signal generating device 16 is installed on the right side panel of the chassis. The control panel of the physiological signal generating device 16 is installed on the outside of the right side panel of the chassis, and the signal interface of the physiological signal generating device 16 is installed on the inside of the right side panel of the chassis. The signal acquisition device 1912 is installed on one side of the electrical cabinet of the shielding partition 18 and is protected by a shielding cover externally to further reduce the influence of the electromagnetic noise inside the chassis on the acquisition accuracy.

[0060] In this embodiment, the physiological signal generating device 16 can generate electroencephalogram signals, electrocardiogram signals, electromyogram signals, square wave signals, sine wave signals, and triangular wave signals; the physiological signal generating device 16 is provided with a setting interface for signal amplitude, frequency, and gain.

[0061] In this embodiment, the output end of the physiological signal generating device 16 is connected to the input end of the signal transfer board 1714, and the output end of the signal transfer board 1714 is connected to the corresponding skin simulator reference electrode 1712 through a wire.

[0062] In this embodiment, the signal acquisition device 1912 can implement the acquisition function of DC signals and AC signals. The signal acquisition device 1912 is provided with CH1, CH2, CH3, CH4, CH5, CH6, CH7, and CH8 acquisition channels. Among them, CH1 and CH2 are standard signal acquisition channels, and these channels are directly connected to the output end of the signal generating device for acquiring standard test signals; CH3, CH4, CH5, CH6, CH7, and CH8 are device signal acquisition channels. The device signal acquisition channels are connected to the measured electrode interface. Finally, the signal acquisition device 1912 transmits the signals of each channel to the host computer for processing.

[0063] In this embodiment, the electrochemistry acquisition system 1903 can implement the acquisition of the open circuit voltage, impedance spectrum, cyclic voltammogram curve, and time-current curve of the device.

[0064] As Figure 1 and Figure 7 shown, the liquid circulation system 2 is used to complete the circulating transportation of liquid substances in the skin simulator and control the skin sweating amount through the skin simulator, and includes a liquid circulation system bottom plate 21, a flow meter 22, a water pump 23, a flow rate adjusting device 24, a scale 25, an upper liquid storage tank 2602, a lower liquid storage tank 2601, a connecting pipe 27, a fan 29, a liquid circulation system controller, and a power supply 28; among them, the lower liquid storage tank 2601 is installed on the lower plane of the liquid circulation system. The lower liquid storage tank 2601 is provided with a water inlet and a water outlet. The water inlet realizes the replenishment of liquid substances in the liquid storage tank, and the water outlet is connected to the water inlet of the water pump 23 through a water pipe. The water outlet of the water pump 23 is connected to the water inlet of the flow meter 22. The water outlet of the flow meter 22 is connected to the water inlet of the upper liquid storage tank 2602. The water outlet of the upper liquid storage tank 2602 is connected to the water inlet of the skin simulator through a water pipe passing through the liquid circulation inlet hole. The water outlet of the skin simulator is connected to the water inlet of the flow rate adjusting device 24 through a water pipe passing through the liquid circulation outlet hole. The water outlet of the flow rate adjusting device 24 is connected to the lower liquid storage tank 2601 through a water pipe. Through the above connection method, the control and test of liquid circulation are realized.

[0065] In this embodiment, the above liquid circulation system 2 determines the circulation speed of the liquid inside the skin simulator during the current test by observing the reading of the flowmeter. When the water flow speed is too high, the flow rate adjusting device is moved upward to reduce the flow rate of the liquid in the upper liquid storage tank 2602 flowing into the skin simulator; when the water flow speed is too low, the flow rate adjusting device is moved downward to increase the flow rate of the liquid in the upper liquid storage tank 2602 flowing into the skin simulator.

[0066] Those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include known common knowledge or conventional technical means in the technical field not disclosed in this disclosure. The specification and embodiments are only to be considered exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0067] It should be understood that the present invention is not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. A non-invasive bioelectric electrode performance tester, characterized in that The non-invasive bioelectric electrode performance tester is composed of a test host and a liquid circulation system. The test host mainly includes: A device operation table, which is used to install the skin simulator and the acquisition end of the signal acquisition system to achieve the overall performance test of the device under test; A skin simulator, installed on the device operation table and connected to the liquid circulation system, is used to simulate the physiological electrical signals generated by the human skin in a humid and hot environment. It has a module for simulating the humid and hot state of the human skin and a module for simulating the humid and hot state of the head. The skin simulator can be replaced according to different test environments; An electrical cabinet, which is used to install the electrical equipment of the signal acquisition system, the electrochemistry acquisition system and the device motion platform control system, and has an electromagnetic shielding function to prevent signal crosstalk inside the system; A signal acquisition system, installed in the electrical cabinet, is used to generate and acquire multi-modal signals in device testing, and can acquire DC signals and AC signals in device testing; An electrochemistry acquisition system, installed in the electrical cabinet, is used to acquire electrochemistry signals in device testing; A device motion platform, installed in the electrical cabinet, realizes the three-dimensional movement of the device under test through a robotic arm, simulates the activity state of the device under different human motion states, including the acquisition performance analysis in the motion state and the static state, and realizes the systematic evaluation of the device.

2. The non-invasive bioelectric electrode performance tester according to claim 1, wherein, The device operation table includes a skin simulator bracket, a skin simulator body, a pressure adjustment system and a signal transfer board. Among them, the skin simulator bracket is installed on the bottom plate, the skin simulator body is installed on the skin simulator bracket, and the skin simulator body can be disassembled and installed on the skin simulator bracket by horizontal sliding; the pressure adjustment system is installed on the sliding seat of the skin simulator bracket, and the pressure adjustment system can adjust the height and pressure on the skin simulator bracket by vertical sliding; the signal transfer board is installed on the shielding partition board and is used to realize the transfer of multi-modal signals in the signal acquisition system.

3. The non-invasive bioelectric electrode performance tester according to claim 2, wherein The pressure adjustment system includes a handwheel adjustment mechanism, a pressure acquisition module and a device clamping mechanism. The handwheel adjustment mechanism can realize the fine adjustment of the Z-axis direction displacement of the pressure acquisition module. The pressure acquisition module realizes the signal acquisition of the pressure between the device and the skin-like interface. The device clamping mechanism realizes the fixation and signal transmission of the device under test; the device clamping mechanism can be replaced according to the sizes of different devices under test.

4. The non-invasive bioelectric electrode performance tester according to claim 3, characterized in that, The pressure acquisition module includes a pressure sensor, a sliding structure and a support component. Among them, the pressure sensor is installed in the support component. The force receiving end of the pressure sensor is connected to the sliding block of the sliding structure. The sliding block is connected to the device clamping mechanism. The sliding block makes a linear reciprocating motion on the slide rail by changing the contact pressure. Different pressure values are generated on the force receiving end of the pressure sensor during the movement of the sliding block, and the pressure sensor acquires different pressure signals.

5. The non-invasive bioelectric electrode performance tester according to claim 1, characterized in that, The skin simulator is equipped with a skin surface module and a skin storage module. The skin surface module is encapsulated on the upper and lower end faces of the skin storage module to simulate the upper and lower skin layers of the human body. The skin surface module has the functions of simulating human skin sweating and constant temperature, and the skin storage module has the function of simulating the internal humid and hot environment of the human body. There are interfaces for connecting the liquid circulation system on the outer wall of the skin storage module to realize the circulating flow function of the internal liquid environment of the skin.

6. The non-invasive bioelectric electrode performance tester according to claim 5, characterized in that, The skin surface module has a replaceable function, and different skin surface modules with different sweating pore diameters can be replaced according to different test requirements to achieve the control of different sweating amounts. The skin simulator has electrode mounting holes for mounting reference electrodes for introducing bioelectric signals.

7. The non-invasive bioelectric electrode performance tester according to claim 5, characterized in that, The skin surface module includes a module for simulating the humid and hot state of human skin and a module for simulating the humid and hot state of the head, and can construct test environments for head physiological signals and body physiological signals according to different test states.

8. The non-invasive bioelectric electrode performance tester according to claim 1, characterized in that, The electrical cabinet includes a control electrical module, a signal acquisition system, an electrochemical acquisition system, and a device motion platform. Among them, the control electrical module is installed on the bottom plate, and the outside is enclosed and protected by an electromagnetic shielding cover for the electrical module to reduce the electromagnetic interference of the electrical system on physiological signals. The signal acquisition system is installed on the shielding partition away from the control electrical module, and the output and acquisition ports of physiological signals are led to the device operation table through the adapter plate at the other end. The electrochemical acquisition system is installed on the bottom plate, and the acquisition cable is led out to the device operation table through the shielding partition. The device motion platform is installed on the bottom plate through the device motion platform bracket, and the Y-axis robotic arm of the device motion platform is led out to the device operation table through the shielding partition.

9. The non-invasive bioelectric electrode performance tester according to claim 8, wherein The control electrical module includes a PLC module, a driver module, an acquisition card module, and a power supply module. The input end of the PLC module is connected to an external host computer, and the output end of the PLC module is connected to the input end of the driver module to transmit instructions to the driver. The output end of the driver is connected to the X-axis motor and the Y-axis motor to control the movement of the robotic arm. The acquisition card module is connected to the pressure regulation system to collect pressure signals during the device test. The power supply module realizes the power supply for the entire test system.

10. The non-invasive bioelectric electrode performance tester according to claim 1, characterized in that, The signal acquisition system includes a physiological signal generating device and a signal acquisition device. The physiological signal generating device is installed on the right side panel of the chassis. Among them, the control panel of the physiological signal generating device is installed on the outside of the right side panel of the chassis, and the signal interface of the physiological signal generating device is installed on the inside of the right side panel of the chassis. The signal acquisition device is installed on one side of the shielding partition of the electrical cabinet, and the outside is protected by a shielding cover to reduce the interference of the internal electromagnetic noise of the chassis on the acquisition accuracy.

11. The non-invasive bioelectric electrode performance tester according to claim 10, wherein, The physiological signal generating device can generate electroencephalogram signals, electrocardiogram signals, electromyogram signals, square wave signals, sine wave signals, and triangular wave signals. The physiological signal generating device has a setting interface for signal amplitude, frequency, and gain.

12. The non-invasive bioelectric electrode performance tester according to claim 10, characterized in that, The output end of the physiological signal generating device is connected to the input end of the signal adapter plate, and the output end of the signal adapter plate is connected to the reference electrode in the corresponding skin simulator through a wire.

13. The non-invasive bioelectric electrode performance tester according to claim 10, wherein The signal acquisition device can realize the acquisition functions of DC signals and AC signals. The signal acquisition device has multiple acquisition channels, including a standard signal acquisition channel and a device signal acquisition channel. During the test, the standard signal acquisition channel is connected to the corresponding interface of the physiological signal generator, and the device signal acquisition channel is connected to the device interface. Finally, the signal acquisition device transmits the signals of each channel to the host computer for processing.

14. The non-invasive bioelectric electrode performance tester according to claim 1, characterized in that, The electrochemical acquisition system can realize the acquisition of the open circuit voltage, impedance spectrum, cyclic voltammetry curve, and chronoamperometry curve of the device.

15. The non-invasive bioelectric electrode performance tester according to claim 1, characterized in that, The device motion platform includes a device motion platform bracket, an X-axis robotic arm, a Y-axis robotic arm, an X-axis motor, and a Y-axis motor, and can realize mechanical motion in a two-dimensional plane. Among them, the X-axis robotic arm is installed on the device motion platform bracket, and the X-axis motor realizes the reciprocating motion of the X-axis sliding component through the X-axis transmission mechanism. The Y-axis robotic arm is vertically installed on the sliding component of the X-axis robotic arm, and the Y-axis motor is installed at the end of the Y-axis robotic arm. The Y-axis motor realizes the reciprocating motion of the Y-axis sliding component through the Y-axis transmission mechanism. A Y-axis extended robotic arm is installed on the Y-axis sliding component, and the Y-axis extended robotic arm is led out to the device operation table through the bellows net outlet on the shielding partition and serves as the mounting seat of the pressure regulation system. The pressure regulation system realizes motion in the Z-axis direction through the vertical sliding mechanism. The extended robotic arm can realize motion in the X-axis and Y-axis directions through the X-axis transmission mechanism and the Y-axis transmission mechanism.

16. The non-invasive bioelectric electrode performance tester according to claim 1, characterized in that, The liquid circulation system is used to complete the circulation and transportation of liquid substances in the skin simulator and to control the skin sweating volume through the skin simulator. It includes an upper liquid storage tank, a lower liquid storage tank, a flow meter, a water pump, a flow rate regulating device, a liquid circulation system controller, and a power supply. Among them, the lower liquid storage tank is installed on the lower plane of the liquid circulation system. The lower liquid storage tank has a water inlet and a water outlet. The water inlet realizes the replenishment of liquid substances in the liquid storage tank, and the water outlet is connected to the water inlet of the water pump through a water pipe. The water outlet of the water pump is connected to the water inlet of the flow meter. The water outlet of the flow meter is connected to the water inlet of the upper liquid storage tank. The water outlet of the upper liquid storage tank is connected to the water inlet of the skin simulator through a water pipe passing through the liquid circulation inlet hole. The water outlet of the skin simulator is connected to the water inlet of the flow rate regulating device through a water pipe passing through the liquid circulation outlet hole. The water outlet of the flow rate regulating device is connected to the lower liquid storage tank through a water pipe. Through the above connection method, the control and test of liquid circulation are realized.

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