Multi-mode bioelectricity signal anti-crosstalk acquisition circuit, chip and wearable device

Abstract

The embodiment of the invention provides a multi-mode bio-electricity signal anti-crosstalk acquisition circuit, a chip and wearable equipment, and the circuit comprises a first power module which is electrically connected with a first bio-electricity signal acquisition module, and is used for obtaining a first power signal, and supplying power to the first bio-electricity signal acquisition module; the first grounding end is used for providing a first grounding signal; the second grounding end is used for providing a second grounding signal, and the first bio-electricity signal acquisition module is electrically connected with the first grounding end and is used for acquiring a first bio-electricity signal; the electric signal isolation module is electrically connected with the first power supply module and the second bio-electricity signal acquisition module and is used for converting the first power supply signal into a second power supply signal and sending the second power supply signal to the second bio-electricity signal acquisition module; and the second bio-electricity signal acquisition module is electrically connected with the second grounding end and is used for acquiring a second bio-electricity signal.

Description

Technical Field

[0001] The present application relates to the technical field of biological signal acquisition, and specifically to a multimodal biological electric signal crosstalk prevention acquisition circuit, chip and wearable device. Background Art

[0002] Human bioelectric signals are widely used in human factors engineering and ergonomics, physiological psychology, health care and other fields. Collecting multiple bioelectric signals from subjects and analyzing or evaluating the subjects' physiological, psychological, and behavioral activities can improve the accuracy of the analysis or evaluation results. However, there is currently a lack of effective technical means to simultaneously collect multiple bioelectric signals in the same device. Summary of the invention

[0003] The present application provides a multimodal bioelectric signal crosstalk prevention acquisition circuit, chip and wearable device.

[0004] In a first aspect, an embodiment of the present application provides a multimodal bioelectric signal anti-crosstalk acquisition circuit, comprising: a first bioelectric signal acquisition module, a second bioelectric signal acquisition module, a first power supply module, an electrical signal isolation module, a first ground terminal, and a second ground terminal;

[0005] The first power supply module and the first bioelectric signal acquisition module are electrically connected, and the first power supply module is used to obtain a first power supply signal and provide the first power supply signal to the first bioelectric signal acquisition module to supply power to the first bioelectric signal acquisition module;

[0006] The first ground terminal is used to provide a first ground signal;

[0007] The second ground terminal is used to provide a second ground signal, wherein the second ground signal is different from the first ground signal;

[0008] The first bioelectric signal acquisition module is electrically connected to the first ground terminal, and the first bioelectric signal acquisition module is used to acquire a first bioelectric signal; the first bioelectric signal uses the first ground signal as a reference signal;

[0009] The electrical signal isolation module is electrically connected to the first power supply module and the second bioelectric signal acquisition module; the electrical signal isolation module is used to convert the first power supply signal provided by the first power supply module into a second power supply signal, and provide the second power supply signal to the second bioelectric signal acquisition module to power the second bioelectric signal acquisition module; the first power supply signal is different from the second power supply signal;

[0010] The second bioelectric signal acquisition module is electrically connected to the second ground terminal, and the second bioelectric signal acquisition module is used to acquire a second bioelectric signal, and at least part of the time when the first bioelectric signal acquisition module acquires the first bioelectric signal coincides with at least part of the time when the second bioelectric signal acquisition module acquires the second bioelectric signal; wherein, the second bioelectric signal and the first bioelectric signal are bioelectric signals of different types, and the second bioelectric signal uses the second ground signal as a reference signal; the first ground signal is different from the second ground signal.

[0011] In a possible implementation manner of the first aspect, the method further includes: a processing module;

[0012] The processing module is electrically connected to the first bioelectric signal acquisition module, the first power supply module, the first ground terminal and the electrical signal isolation module;

[0013] The first power supply module is further used to provide a first power supply signal to the processing module;

[0014] The electrical signal isolation module is further used to convert the second bioelectric signal collected by the second bioelectric signal collection module into a third bioelectric signal; the third bioelectric signal is a signal using the first ground signal as a reference;

[0015] The processing module is used to obtain the first bioelectric signal and the third bioelectric signal collected by the first bioelectric signal collection module, and perform corresponding processing on the first bioelectric signal and the third bioelectric signal.

[0016] In a possible implementation of the first aspect, the method further includes: a storage module;

[0017] The storage module is electrically connected to the processing module, and the storage module is used for offline storage of data collected by the signal collection circuit.

[0018] In a possible implementation of the first aspect, the method further includes: a second power supply module;

[0019] The second power supply module is electrically connected to the electrical signal isolation module and the second bioelectric signal acquisition module;

[0020] The second power supply module is used to obtain the second power supply signal output by the electrical signal isolation module, and supply power to the second bioelectric signal acquisition module based on the second power supply signal.

[0021] In a possible implementation of the first aspect, the electrical signal isolation module includes a power isolation submodule and a bioelectrical signal isolation submodule;

[0022] The power isolation submodule includes a first coil and a second coil, the first coil is electrically connected to the first power module, and the second coil is electrically connected to the second power module, wherein the second coil is used to induce a second power signal based on the first power signal transmitted by the first coil, and send the second power signal to the second power module;

[0023] The bioelectric signal isolation submodule includes a first bioelectric signal transmitter, a third coil, a fourth coil and a first bioelectric signal receiver; the first bioelectric signal transmitter is electrically connected to the second bioelectric signal acquisition module and the second ground terminal, the third coil is electrically connected to the first bioelectric signal transmitter, the fourth coil is electrically connected to the first bioelectric signal receiver, and the first bioelectric signal receiver is electrically connected to the processing module and the first ground terminal;

[0024] Wherein, the first bioelectric signal transmitter is used to generate a first analog signal based on the second bioelectric signal collected by the second bioelectric signal collection module;

[0025] The fourth coil is used for inducing a second analog signal based on the first analog signal transmitted by the third coil, and sending the second analog signal to the first bioelectric signal receiver;

[0026] The first bioelectric signal receiver is used to convert the second analog signal into a third bioelectric signal and transmit it to the processing module.

[0027] In a possible implementation manner of the first aspect, the electrical signal isolation module further includes at least one control signal isolation submodule;

[0028] For each control signal isolation submodule, the control signal isolation submodule includes a second bioelectric signal transmitter, a fifth coil, a sixth coil and a second bioelectric signal receiver; the second bioelectric signal transmitter is electrically connected to the processing module and the first ground terminal, the fifth coil is electrically connected to the second bioelectric signal transmitter, the sixth coil is electrically connected to the second bioelectric signal receiver, and the second bioelectric signal receiver is electrically connected to the second bioelectric signal acquisition module and the second ground terminal;

[0029] Wherein, the processing module is further used to send a first control signal for controlling the second bioelectric signal acquisition module to acquire the second bioelectric signal to the second bioelectric signal transmitter;

[0030] The second bioelectric signal transmitter is used to generate a third analog signal based on the first control signal sent by the processing module;

[0031] The sixth coil is used for inducing a fourth analog signal based on the third analog signal transmitted by the fifth coil, and sending the fourth analog signal to the second bioelectric signal receiver;

[0032] The second bioelectric signal receiver is used to convert the fourth analog signal into a second control signal and transmit it to the second bioelectric signal acquisition module, so that the second bioelectric signal acquisition module acquires the second bioelectric signal based on the second control signal.

[0033] In a possible implementation manner of the first aspect, the method further includes: a processing module;

[0034] The processing module is electrically connected to the second bioelectric signal acquisition module, the second ground terminal and the electrical signal isolation module;

[0035] The electrical signal isolation module is further used to transmit the second power supply signal to the processing module, and convert the first bioelectric signal collected by the first bioelectric signal collection module into a fourth bioelectric signal; the fourth bioelectric signal is a signal using the second ground signal as a reference;

[0036] The processing module is used to obtain the second bioelectric signal and the fourth bioelectric signal collected by the second bioelectric signal collection module, and perform corresponding processing on the second bioelectric signal and the fourth bioelectric signal.

[0037] In a possible implementation of the first aspect, a third bioelectric signal acquisition module is also included;

[0038] The third bioelectric signal acquisition module is electrically connected to the electrical signal isolation module and the second grounding terminal;

[0039] The electrical signal isolation module is further used to provide a second power supply signal to the third bioelectric signal acquisition module;

[0040] The third bioelectric signal acquisition module is used to acquire a fifth bioelectric signal; the fifth bioelectric signal is a signal of the same type as the second bioelectric signal and of a different type from the first bioelectric signal.

[0041] In a possible implementation manner of the first aspect, the first bioelectric signal includes an input collection type bioelectric signal; and the second bioelectric signal includes an output collection type bioelectric signal.

[0042] In a possible implementation of the first aspect, the first bioelectric signal includes a skin electrical activity signal (EDA) signal, the second bioelectric signal includes one of an EEG signal, an EMG signal, and an electrocardiogram (ECG) signal; and the fifth bioelectric signal includes another of an EEG signal, an EMG signal, and an ECG signal.

[0043] In a possible implementation of the first aspect, the first bioelectric signal acquisition module includes a signal acquisition terminal, a signal amplifier, and an analog-to-digital signal converter;

[0044] The signal acquisition end is electrically connected to the input end of the signal amplifier, the output end of the signal amplifier is electrically connected to the input end of the analog-to-digital signal converter, and the output end of the analog-to-digital signal converter is electrically connected to the processing module.

[0045] In a second aspect, an embodiment of the present application provides a chip, comprising: a multimodal bioelectric signal anti-crosstalk acquisition circuit as described in any one of the first aspects above.

[0046] In the third aspect, an embodiment of the present application provides a wearable device, comprising a shell, and a multimodal bioelectric signal anti-crosstalk acquisition circuit as described in any one of the first aspect or the chip as described in the second aspect, a first bioelectric signal sensor, and a second bioelectric signal sensor arranged in the shell; wherein the first bioelectric signal sensor is used to collect the first bioelectric signal of the subject and transmit it to the first bioelectric signal acquisition module in the multimodal bioelectric signal anti-crosstalk acquisition circuit as described in any one of the first aspect or the chip as described in the second aspect; the second bioelectric signal sensor is used to collect the second bioelectric signal of the subject and transmit it to the second bioelectric signal acquisition module in the multimodal bioelectric signal anti-crosstalk acquisition circuit as described in any one of the first aspect or the chip as described in the second aspect.

[0047] Using the solution provided in the embodiment of the present application, the multimodal bioelectric signal anti-crosstalk acquisition circuit includes a first bioelectric signal acquisition module, a second bioelectric signal acquisition module, a first power supply module, an electrical signal isolation module, a first ground terminal and a second ground terminal; the first power supply module is electrically connected to the first bioelectric signal acquisition module, the first power supply module is used to obtain a first power supply signal, and provide the first power supply signal to the first bioelectric signal acquisition module to power the first bioelectric signal acquisition module; the first ground terminal is used to provide a first ground signal; the second ground terminal is used to provide a second ground signal; the first bioelectric signal acquisition module is electrically connected to the first ground terminal, the first bioelectric signal acquisition module is used to collect the first bioelectric signal; the first bioelectric signal uses the first ground signal as a reference signal; the electrical signal isolation module is electrically connected to the first power supply module and the second bioelectric signal acquisition module, the electrical signal isolation module is used to convert the first power supply signal provided by the first power supply module into a second power supply signal, and provide the second power supply signal to the second bioelectric signal acquisition module to power the second bioelectric signal acquisition module. The first power signal is different from the second power signal; the second bioelectric signal acquisition module is electrically connected to the second ground terminal, the second bioelectric signal acquisition module is used to acquire the second bioelectric signal, and at least part of the time when the second bioelectric signal acquisition module acquires the second bioelectric signal coincides with at least part of the time when the first bioelectric signal acquisition module acquires the first bioelectric signal. Among them, the second bioelectric signal and the first bioelectric signal are different types of bioelectric signals, and the second bioelectric signal uses the second ground signal as a reference signal; the first ground signal is different from the second ground signal. In this way, in the embodiment of the present application, the multimodal bioelectric signal anti-crosstalk acquisition circuit includes not only the first bioelectric signal acquisition module, but also the second bioelectric signal acquisition module, so that the first bioelectric signal and the second bioelectric signal can be acquired at the same time, and different ground signals and power signals can be provided for the first bioelectric signal acquisition module and the second bioelectric signal acquisition module in the signal acquisition circuit, so that the first bioelectric signal acquisition module and the second bioelectric signal acquisition module will not interfere with each other when they acquire the first bioelectric signal and the second bioelectric signal at the same time due to the difference in power signals and ground signals. That is, when the multimodal bioelectric signal anti-crosstalk acquisition circuit provided in the embodiment of the present application simultaneously acquires the first bioelectric signal and the second bioelectric signal, due to the isolation between the power signal and the ground signal between the first bioelectric signal acquisition module and the second bioelectric signal acquisition module, the first bioelectric signal and the second bioelectric signal will not cause crosstalk, thereby reducing the complexity of acquiring the first bioelectric signal and the second bioelectric signal by the multimodal bioelectric signal anti-crosstalk acquisition circuit, solving the crosstalk problem when simultaneously acquiring multiple bioelectric signals in the same device or the same circuit, thereby achieving the simultaneous acquisition of multiple bioelectric signals in the same circuit or the same device, thereby improving the efficiency and accuracy of bioelectric signal acquisition. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0049] Figure 1 A schematic diagram of the structure of a multimodal bioelectric signal crosstalk prevention acquisition circuit provided in an embodiment of the present application;

[0050] Figure 2 A schematic diagram of the structure of another multimodal bioelectric signal crosstalk prevention acquisition circuit provided in an embodiment of the present application;

[0051] Figure 3 A schematic diagram of the structure of another multimodal bioelectric signal crosstalk prevention acquisition circuit provided in an embodiment of the present application;

[0052] Figure 4 A schematic diagram of the structure of another multimodal bioelectric signal crosstalk prevention acquisition circuit provided in an embodiment of the present application;

[0053] Figure 5 A schematic diagram of the structure of another multimodal bioelectric signal crosstalk prevention acquisition circuit provided in an embodiment of the present application;

[0054] Figure 6a A schematic diagram of the structure of another multimodal bioelectric signal crosstalk prevention acquisition circuit provided in an embodiment of the present application;

[0055] Figure 6b A schematic diagram of the structure of another multimodal bioelectric signal crosstalk prevention acquisition circuit provided in an embodiment of the present application;

[0056] Figure 7 A schematic diagram of the structure of another multimodal bioelectric signal crosstalk prevention acquisition circuit provided in an embodiment of the present application;

[0057] Figure 8 A schematic diagram of the structure of another multimodal bioelectric signal crosstalk prevention acquisition circuit provided in an embodiment of the present application;

[0058] Fig. 9 A schematic diagram of the structure of another multimodal bioelectric signal crosstalk prevention acquisition circuit provided in an embodiment of the present application;

[0059] Fig.10 A schematic diagram of the structure of another multimodal bioelectric signal crosstalk prevention acquisition circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0060] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0061] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0062] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0063] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0064] Compared with other biological signals of the human body, bioelectric signals have the characteristics of weak signal, strong noise, and narrow frequency range. These characteristics bring higher requirements to the collection and processing of bioelectric signals to ensure the accuracy of bioelectric signals. In the embodiment of the present application, different types of bioelectric signals are also called different modal bioelectric signals; collecting multiple bioelectric signals means collecting multimodal bioelectric signals. Bioelectric signals may include but are not limited to EEG (Electroencepha lography, electroencephalography) signals, EDA (Electroderma l Activity, electrical skin activity) signals, EMG (Electromyography, electromyography), or ECG (Electrocardiogram, electrocardiogram) signals.

[0065] In order to improve the test accuracy of the subject's physiological state and activity behavior, a variety of bioelectric signals can be collected for comprehensive analysis and evaluation. In an optional application example, the galvanic skin response is one of the most sensitive emotional feedbacks, which comes from the autonomous activation of the skin sweat glands. It is closely related to emotions, arousal, and attention, and is the most widely used type of measurement indicator in the physiological response system. The galvanic skin response can be used as a good indicator for evaluating individual physiological arousal, cognitive load, effort, emotional response, and stress resistance. Therefore, when collecting bioelectric signals, EDA signals and other bioelectric signals, such as EEG signals, are usually collected. The inventor found in the process of implementing the embodiment of the present application that the galvanic skin response is caused by the changes in the dilation and contraction of blood vessels in the skin and the secretion of sweat glands when the body is stimulated by external factors or the emotional state changes, thereby causing changes in skin resistance. When collecting EDA signals, a pair of electrodes can be placed on the skin surface and a small constant power signal is applied to the skin, so that the current flowing through the skin is proportional to the skin conductance. After the current-voltage conversion, the skin conductance change signal will be recorded to obtain the EDA signal. Since it is necessary to apply a tiny constant power signal to the skin surface when collecting EDA signals, and the skin is conductive, if other bioelectric signals are collected at the same time when collecting EDA signals, such as collecting EEG signals at the same time, the tiny power signal applied to the skin surface will be conducted to the EEG signal collection point, causing certain interference to the collection of EEG signals, resulting in inaccurate collection of EEG signals. In order to improve the collection accuracy of multiple bioelectric signals, different bioelectric signals can be collected by different devices. Alternatively, multiple bioelectric signals can also be collected in the same device. At this time, in order to reduce the interference problem when collecting bioelectric signals, different bioelectric signals need to be collected in time. That is, only one bioelectric signal can be collected at the same time, resulting in low efficiency and high complexity in the collection of multiple bioelectric signals. In addition, it is impossible to collect multiple bioelectric signals of the subject at the same time.

[0066] The embodiment of the present application provides a multimodal bioelectric signal anti-crosstalk acquisition circuit, chip and wearable device, the multimodal bioelectric signal anti-crosstalk acquisition circuit includes a first bioelectric signal acquisition module, a second bioelectric signal acquisition module, a first power module, an electrical signal isolation module, a first ground terminal and a second ground terminal; the first power module is electrically connected to the first bioelectric signal acquisition module, the first power module is used to obtain a first power signal, and provide the first power signal to the first bioelectric signal acquisition module to power the first bioelectric signal; the first ground terminal is used to provide a first ground signal; the second ground terminal is used to provide a second ground signal; the first bioelectric signal acquisition module is electrically connected to the first ground terminal, the first bioelectric signal acquisition module is used to collect the first bioelectric signal; the first bioelectric signal uses the first ground signal as a reference signal; the electrical signal isolation module is electrically connected to the first power module and the second bioelectric signal acquisition module, the electrical signal isolation module is used to convert the first power signal provided by the first power module into a second power signal, and provide the second power signal to the second bioelectric signal acquisition module to power the second bioelectric signal acquisition module. The first power signal is different from the second power signal. The second bioelectric signal acquisition module is electrically connected to the second ground terminal, and is used to acquire the second bioelectric signal, and at least part of the time when the second bioelectric signal acquisition module acquires the second bioelectric signal coincides with at least part of the time when the first bioelectric signal acquisition module acquires the first bioelectric signal. The second bioelectric signal and the first bioelectric signal are different bioelectric signals, and the second bioelectric signal uses the second ground signal as a reference signal; the first ground signal is different from the second ground signal. Thus, in the embodiment of the present application, the multimodal bioelectric signal anti-crosstalk acquisition circuit includes not only the first bioelectric signal acquisition module, but also the second bioelectric signal acquisition module, so the first bioelectric signal and the second bioelectric signal can be collected at the same time. In order to reduce the crosstalk between the first bioelectric signal and the second bioelectric signal, in the multimodal bioelectric signal anti-crosstalk acquisition circuit, the first power supply module can provide the first bioelectric signal acquisition module with a first power supply signal, and the first ground terminal provides the first ground signal for the first bioelectric signal acquisition module, the electrical signal isolation module provides the second power supply signal for the second bioelectric signal acquisition module, and the second ground terminal provides the second ground signal for the second bioelectric signal acquisition module, so that the power supply signal and the ground signal between the first bioelectric signal acquisition module and the second bioelectric signal acquisition module are different, that is, the first bioelectric signal acquisition module and the second bioelectric signal acquisition module work in different power supply systems. Therefore, the first bioelectric signal acquisition module cannot recognize the second bioelectric signal, and the second bioelectric signal acquisition module cannot recognize the first bioelectric signal. Based on this, when the first bioelectric signal acquisition module acquires the first bioelectric signal, and the second bioelectric signal acquisition module acquires the second bioelectric signal, no crosstalk will be caused between them.Therefore, the multimodal bioelectric signal anti-crosstalk acquisition circuit provided in the embodiment of the present application can simultaneously acquire the first bioelectric signal and the second bioelectric signal, and the first bioelectric signal and the second bioelectric signal will not cause crosstalk, thereby reducing the complexity of the multimodal bioelectric signal anti-crosstalk acquisition circuit in acquiring the first bioelectric signal and the second bioelectric signal, and improving the efficiency of bioelectric signal acquisition. In other words, the embodiment of the present application solves the problem of crosstalk between multiple bioelectric signals when multiple bioelectric signals are simultaneously acquired in the same device or the same circuit in the related art, making it possible to simultaneously acquire multiple bioelectric signals in the same circuit or the same device, reducing the complexity of bioelectric signal acquisition. Moreover, in the embodiment of the present application, different bioelectric signals of the subject can be acquired simultaneously at the same time, thereby improving the accuracy of the test of the subject's physiological state and activity behavior. The following is a detailed description.

[0067] See also Figure 1 , is a schematic diagram of the structure of a multi-modal bioelectric signal crosstalk prevention acquisition circuit provided in an embodiment of the present application. Figure 1 As shown, the multimodal bioelectric signal crosstalk prevention acquisition circuit includes:

[0068] A first bioelectric signal acquisition module 11 , a second bioelectric signal acquisition module 12 , a first power supply module 13 , an electrical signal isolation module 14 , a first ground terminal 15 and a second ground terminal 16 .

[0069] The first power supply module 13 is electrically connected to the first bioelectric signal acquisition module 11 . The first power supply module 13 is used to obtain a first power supply signal and to increase the first power supply signal to the first bioelectric signal acquisition module 11 so as to supply power to the first bioelectric signal acquisition module 11 .

[0070] The first ground terminal 15 is used to provide a first ground signal.

[0071] The second ground terminal 16 is used to provide a second ground signal.

[0072] The first bioelectric signal acquisition module 11 is electrically connected to the first ground terminal 15. The first bioelectric signal acquisition module 11 is used to acquire a first bioelectric signal, wherein the first bioelectric signal uses the first ground signal as a reference signal.

[0073] The electrical signal isolation module 14 is electrically connected to the first power module 13 and the second bioelectric signal acquisition module 12. The electrical signal isolation module 14 is used to convert the first power signal provided by the first power module 13 into a second power signal, and provide the second power signal to the second bioelectric signal acquisition module 12 to power the second bioelectric signal acquisition module. The first power signal is different from the second power signal.

[0074] The second bioelectric signal acquisition module 12 is electrically connected to the second grounding module 16. The second bioelectric signal acquisition module 12 is used to acquire a second bioelectric signal, and at least part of the time when the second bioelectric signal acquisition module 12 acquires the second bioelectric signal coincides with at least part of the time when the first bioelectric signal acquisition module 11 acquires the first bioelectric signal.

[0075] The second bioelectric signal uses the second ground signal as a reference electrical signal.

[0076] In an embodiment of the present application, a multimodal bioelectric signal crosstalk prevention acquisition circuit includes a first bioelectric signal acquisition module 11, a second bioelectric signal acquisition module 12, a first power module 13, an electrical signal isolation module 14, a first ground terminal 15 and a second ground terminal 16. Among them, the first receiving terminal 15 and the second ground terminal 16 are different ground terminals, and the first ground signal provided by the first ground terminal 15 is different from the second ground signal provided by the second ground terminal 16. In this way, the module electrically connected to the first ground terminal 15 and the module electrically connected to the second ground terminal 16 in the multimodal bioelectric signal crosstalk prevention acquisition circuit do not share a common ground. The first power module 13 can be electrically connected to the first bioelectric signal acquisition module 11, so that the first power module 13 can be externally connected to the first power signal and supply power to the first bioelectric signal acquisition module 11 through the first power signal. That is, the first power module 13 can provide the first power signal to the first bioelectric signal acquisition module 11 and supply power to the first bioelectric signal acquisition module 11 through the first power signal.

[0077] The first bioelectric signal acquisition module 11 is electrically connected to the first ground terminal 15, and the first bioelectric signal acquisition module 11 acquires the first bioelectric signal. That is, the signal acquired by the first bioelectric signal acquisition module 11 is a reference signal to obtain the first bioelectric signal. The electrical signal isolation module 14 is electrically connected to the first power module 13 and the second bioelectric signal acquisition module 12. In this way, the electrical signal isolation module 14 can convert the first power signal provided by the first power module 13 into a second power signal, transmit the second power signal to the second bioelectric signal acquisition module 12 as the power signal of the second bioelectric signal acquisition module 12, and supply power to the second bioelectric signal acquisition module 12. That is, the second bioelectric signal acquisition module 12 uses the second power signal as the power signal, and the first bioelectric signal acquisition module 11 uses the first power signal as the power signal. In this way, in the embodiment of the present application, the power signals between the first bioelectric signal acquisition module 11 and the second bioelectric signal acquisition module 12 are different.

[0078] The second bioelectric signal acquisition module 12 is electrically connected to the second ground terminal 16, and the second bioelectric signal acquisition module 12 is used to acquire the second bioelectric signal. In this way, the second bioelectric signal acquired by the second bioelectric signal acquisition module 12 uses the second ground signal provided by the second ground terminal 16 as a reference signal. That is to say, in the multimodal bioelectric signal crosstalk prevention acquisition circuit, the first bioelectric signal acquisition module 11 is powered by the first power supply module 13, and the first bioelectric signal acquisition module 11 is electrically connected to the first ground terminal 15, and the second bioelectric signal acquisition module 12 converts the first power supply signal into the second power supply signal through the electrical signal isolation module 14, and uses the second power supply signal as the power supply signal. The second bioelectric signal acquisition module 12 is electrically connected to the second ground terminal 16. The power supply and ground terminal of the first bioelectric signal acquisition module 11 and the second bioelectric signal acquisition module 12 in the signal acquisition circuit are different, that is, in the multimodal bioelectric signal anti-crosstalk acquisition circuit, the power supply between the first bioelectric signal acquisition module 11 and the second bioelectric signal acquisition module 12 can be isolated by the electrical signal isolation module 14, and the ground terminal isolation is achieved by electrically connecting the first bioelectric signal acquisition module 11 and the second bioelectric signal acquisition module 12 to different ground terminals respectively. In this way, the first bioelectric signal acquisition module 11 and the second bioelectric signal acquisition module 12 are modules working in different power supply systems in the multimodal bioelectric signal anti-crosstalk acquisition circuit. Therefore, the first bioelectric signal acquired by the first bioelectric signal acquisition module 11 will not interfere with the second bioelectric signal acquired by the second bioelectric signal acquisition module 12. Similarly, the second bioelectric signal acquired by the second bioelectric signal acquisition module 12 will not interfere with the first bioelectric signal acquired by the first bioelectric signal acquisition module 11. That is, the first bioelectric signal and the second bioelectric signal will not interfere with each other.

[0079] In some embodiments, the first bioelectric signal may be a skin electrical signal, and the second bioelectric signal may be a bioelectric signal other than the skin electrical signal. Since a tiny power signal needs to be input into the skin when collecting skin electrical signals, in the related art, if EDA and EEG are integrated into one circuit and collected at the same time, the power signal input when collecting EDA will interfere with the collection of EEG. In the multimodal bioelectric signal crosstalk prevention acquisition circuit provided in the embodiment of the present application, the power supply terminal and the ground terminal of the EDA are isolated, so that the power supply signal input when collecting the EDA signal is different from the reference signal of the EEG, and the second bioelectric signal acquisition module 12 will not collect the signal, and thus will not interfere with the EEG.

[0080] In this way, in the embodiment of the present application, the multimodal bioelectric signal anti-crosstalk acquisition circuit can collect the first bioelectric signal through the first bioelectric signal acquisition module 11 and the second bioelectric signal through the second bioelectric signal acquisition module 12. Since the power supply signal and the ground signal between the first bioelectric signal acquisition module 11 and the second bioelectric signal acquisition module 12 are completely different, the first bioelectric signal collected by the first bioelectric signal acquisition module 11 and the second bioelectric signal collected by the second bioelectric signal acquisition module 12 will not be correlated and cause interference. Therefore, in the implementation of the present application, the first bioelectric signal and the second bioelectric signal can be collected simultaneously by the first bioelectric signal acquisition module 11 and the second bioelectric signal acquisition module 12, thereby realizing the simultaneous collection of different signals, and there will be no interference between different signals, thereby improving the efficiency of signal acquisition and reducing the complexity of signal acquisition.

[0081] As a possible implementation, the above signal acquisition circuit, such as Figure 2 As shown, it also includes: a processing module 17.

[0082] The processing module 17 is electrically connected to the first bioelectric signal acquisition module 11 , the first power supply module 13 , the first ground terminal 15 and the electrical signal isolation module 14 .

[0083] The first power module 13 is further configured to provide a first power signal to the processing module 17 .

[0084] The electrical signal isolation module 14 is further used to convert the second bioelectric signal collected by the second bioelectric signal collection module 12 into a third bioelectric signal.

[0085] The third bioelectric signal uses the first ground signal as a reference signal.

[0086] The processing module 17 is used to obtain the first bioelectric signal and the third bioelectric signal collected by the first bioelectric signal collection module 11, and perform corresponding processing on the first bioelectric signal and the third bioelectric signal.

[0087] In the embodiment of the present application, after the first bioelectric signal acquisition module 11 acquires the first bioelectric signal and the second bioelectric signal acquisition module 12 acquires the second bioelectric signal, it is necessary to process the first bioelectric signal and the second bioelectric signal in order to obtain the required information. At this time, the multimodal bioelectric signal anti-crosstalk acquisition circuit also includes a processing module 17, and the processing module 17 is electrically connected to the first bioelectric signal acquisition module 11, the first power module 13, the first ground terminal 15 and the electrical signal isolation module 14. In this way, the first bioelectric signal acquisition module 11 can directly transmit the first bioelectric signal it acquires to the processing module 17. Since the processing module 17 is electrically connected to the first power module 13 and the first ground terminal 15, the power supply signal and the ground signal between the processing module 17 and the first bioelectric signal acquisition module 11 are the same, that is, the power supply terminal of the processing module 17 and the first bioelectric signal acquisition module 11 is the same and shares the same ground. The processing module 17 can identify the first bioelectric signal acquired by the first bioelectric signal acquisition module 11, and the processing module 17 can directly receive the first power supply signal. However, the power supply terminal and the ground terminal between the second bioelectric signal acquisition module 12 and the processing module 17 are different, so the processing module 17 cannot directly identify the second bioelectric signal collected by the second bioelectric signal acquisition module 12, and the electrical signal isolation module 14 is required to convert the second bioelectric signal into a third bioelectric signal that can be recognized by the processing module 17. At this time, the electrical signal isolation module 14 is electrically connected to the second bioelectric signal acquisition module 12, and the second bioelectric signal acquisition module 12 can transmit the second bioelectric signal it collects to the electrical signal isolation module 14, and the electrical signal isolation module 14 converts the second bioelectric signal into a third bioelectric signal with the first ground signal as a reference signal. The electrical signal isolation module 14 transmits the third bioelectric signal to the processing module 17, so that the processing module 17 can perform corresponding processing on the first bioelectric signal and the third bioelectric signal.

[0088] The processing module 17 can share the power supply terminal and the ground terminal with the first bioelectric signal acquisition module 11, and can also share the power supply terminal and the ground terminal with the second bioelectric signal acquisition module 12. That is, as another possible implementation, Figure 3 As shown, the multimodal bioelectric signal crosstalk prevention acquisition circuit also includes: a processing module 17.

[0089] The processing module 17 is electrically connected to the second bioelectric signal acquisition module 12 , the second ground terminal 16 and the electrical signal isolation module 14 .

[0090] The electrical signal isolation module 14 is further used to transmit the second power supply signal to the processing module 17, and convert the first bioelectric signal collected by the first bioelectric signal collection module 11 into a fourth bioelectric signal. The fourth bioelectric signal uses the second ground signal as a reference signal.

[0091] The processing module 17 is used to obtain the second bioelectric signal and the fourth bioelectric signal collected by the second bioelectric signal collection module 12, and perform corresponding processing on the second bioelectric signal and the fourth bioelectric signal.

[0092] In the embodiment of the present application, after the first bioelectric signal acquisition module 11 acquires the first bioelectric signal and the second bioelectric signal acquisition module 12 acquires the second bioelectric signal, the first bioelectric signal and the second bioelectric signal need to be processed in order to obtain the required information. At this time, the multimodal bioelectric signal anti-crosstalk acquisition circuit also includes a processing module 17, and the processing module 17 is electrically connected to the second bioelectric signal acquisition module 12, the second ground terminal 16 and the electrical signal isolation module 14. In this way, the second bioelectric signal acquisition module 12 can directly transmit the second bioelectric signal it acquires to the processing module 17. Since the processing module 17 is electrically connected to the electrical signal isolation module 14 and the second ground terminal 16, the power supply signal and the ground signal between the processing module 17 and the second bioelectric signal acquisition module 12 are the same, that is, the power supply terminal of the processing module 17 and the second bioelectric signal acquisition module 12 is the same and shares the same ground. Therefore, the processing module 17 can identify the second bioelectric signal acquired by the second bioelectric signal acquisition module 12, and the processing module 17 can directly receive the second power supply signal. However, the power supply terminal and the ground terminal between the first bioelectric signal acquisition module 11 and the first processing module 17 are different, so the processing module 17 cannot directly identify the first bioelectric signal collected by the first bioelectric signal acquisition module 11, and the electrical signal isolation module 14 is required to convert the first bioelectric signal into a fourth bioelectric signal that can be recognized by the processing module 17. At this time, the electrical signal isolation module 14 is electrically connected to the first bioelectric signal acquisition module 11, and the first bioelectric signal acquisition module 11 can transmit the first bioelectric signal it collects to the electrical signal isolation module 14, and the electrical signal isolation module 14 converts the first bioelectric signal into a fourth bioelectric signal with the second ground signal as a reference signal, and the electrical signal isolation module 14 transmits the fourth bioelectric signal to the processing module 17, so that the processing module 17 can perform corresponding processing on the second bioelectric signal and the fourth bioelectric signal.

[0093] For the convenience of description, the following description is made by taking the example that the power supply terminal and the ground terminal of the processing module 17 and the first bioelectric signal acquisition module 11 are the same.

[0094] refer to Figure 4 As shown, the above signal acquisition circuit also includes: a storage module 18.

[0095] The storage module 18 is electrically connected to the processing module 17. The storage module 18 is used to store the data collected by the signal collection circuit offline.

[0096] That is, in order to prevent data loss, the data collected by the signal acquisition circuit can be stored offline through the storage module 18, that is, the data collected by the signal acquisition circuit is stored at a backup level, so that when the data is lost, the data collected by the signal acquisition circuit can be restored through the data stored in the storage module 18. The data stored in the storage module 18 can be transmitted to the storage module 18 through the processing module 17. That is, the data stored in the storage module 18 is controlled by the processing module 17. After acquiring the first bioelectric signal and the third bioelectric signal, the processing module 17 can transmit the first bioelectric signal and the third bioelectric signal to the storage module 18 for storage. In some embodiments, the storage module 18 can store the data collected by the signal acquisition circuit offline when the network is abnormal. When the network is normal, the data collected by the signal acquisition circuit can be uploaded to the host computer so that the host computer can obtain relevant data.

[0097] For ease of implementation, the storage module 18 is electrically connected to the first power module 13 and the first ground terminal 15 .

[0098] In some embodiments, the storage module 18 can be a built-in storage chip or an expandable storage medium, such as a memory card or flash memory. Through the storage module 18, the user can easily save and transmit the collected data for subsequent analysis and processing. Compared with wireless real-time transmission of data, by further transmitting the storage module 18, the collected signal data can be stably stored, avoiding data loss or transmission errors that may occur during real-time transmission. This is very important for applications that require long-term recording and preservation of signal data. Further transmitting the storage module 18 can ensure that the collected data is completely saved, including all details and features. In wireless real-time transmission, due to network instability or transmission delays, data packets may be lost or incomplete. Through the storage module 18, it can be ensured that each collected data is completely saved for subsequent analysis and processing. The storage module 18 allows data to be stored offline, which can provide higher data security than wireless transmission. Especially in the processing and transmission of sensitive data, the use of the storage module 18 can better protect the privacy and confidentiality of the data. Through the storage module 18, the user can independently choose the time and method of data transmission. Not limited by network conditions and real-time transmission speed, users can choose the appropriate time to transmit data to the host computer or other devices according to their needs and convenience.

[0099] As a possible implementation, Figure 5 As shown, the multimodal bioelectric signal anti-crosstalk acquisition circuit further includes: a second power supply module 19.

[0100] The second power supply module 19 is electrically connected to the electrical signal isolation module 14 and the second bioelectrical signal acquisition module 12 .

[0101] The second power supply module 19 is used to obtain the second power supply signal output by the electrical signal isolation module 14 and supply power to the second bioelectric signal acquisition module 12 based on the second power supply signal.

[0102] In the embodiment of the present application, after the electrical signal isolation module 14 converts the first power signal into the second power signal, in some embodiments, the second power signal needs to be adjusted before it can be transmitted to the second bioelectric signal acquisition module 12. At this time, the signal acquisition circuit also includes a second power module 19. The second power module 19 is electrically connected to the electrical signal isolation module 14 and the second bioelectric signal acquisition module 12, so that after the electrical signal isolation module 14 converts the first power signal into the second power signal, it can convert the second power signal into a power signal of the size required by the second bioelectric signal acquisition module 12 to power the second bioelectric signal acquisition module 12.

[0103] As a possible implementation, Figure 6a As shown, the electrical signal isolation module 14 includes a power isolation submodule 141 and a bioelectrical signal isolation submodule 142 .

[0104] The power isolation submodule 141 includes a first coil 1411 and a second coil 1412 . The first coil 1411 is electrically connected to the first power module 13 , and the second coil 1412 is electrically connected to the second power module 19 .

[0105] The second coil 1412 is used to induce a second power signal based on the first power signal transmitted by the first coil 1411 , and send the second power signal to the second power module 19 .

[0106] The bioelectric signal isolation submodule 142 includes a first bioelectric signal transmitter 1421, a third coil 1422, a fourth coil 1423 and a first bioelectric signal receiver 1424. The first bioelectric signal transmitter 1421 is electrically connected to the second bioelectric signal acquisition module 12 and the second ground terminal 16, the third coil 1422 is electrically connected to the first bioelectric signal transmitter 1421, the fourth coil 1423 is electrically connected to the first bioelectric signal receiver 1424, and the first bioelectric signal receiver 1424 is electrically connected to the processing module 17 and the first ground terminal 15.

[0107] The first bioelectric signal transmitter 1421 is used to generate a first analog signal based on the second bioelectric signal collected by the second bioelectric signal collection module 12 .

[0108] The fourth coil 1423 is used to induce a second analog signal based on the first analog signal transmitted by the third coil 1422 , and send the second analog signal to the first bioelectric signal receiver 1424 .

[0109] The first bioelectric signal receiver 1424 is used to convert the second analog signal into a third bioelectric signal and transmit it to the processing module 17 .

[0110] That is, the electrical signal isolation module 14 not only needs to convert the first power signal into the second power signal, but also needs to convert the second bioelectric signal into the third bioelectric signal. Based on this, the electrical signal isolation module 14 includes a power isolation submodule 141 capable of isolating the power signal, and a bioelectric signal isolation submodule 142 capable of isolating the bioelectric signal. Among them, the power isolation submodule 141 induces the first power signal to generate the second power signal by electromagnetic coupling. The power isolation submodule 141 includes a first coil 1411 and a second coil 1412. The first coil 1411 is electrically connected to the first power module 13, so that the first power module 13 transmits the first power signal to the first coil, the first coil generates a changing magnetic field based on the first power signal, and the second coil 1412 induces the second power signal in the changing magnetic field. The second coil transmits the second power signal to the second power module 19. In this way, the second power signal and the first power signal are different electrical signals.

[0111] It should be understood that in the above process, the first power signal should be an AC signal. If the first power signal output by the first power module 13 is not an AC signal, then in some embodiments, Figure 6b As shown, the power isolation submodule 141 also includes a first conversion module 1413. One end of the first conversion module 1413 is electrically connected to the first power module 13, and the other end is electrically connected to the first coil 1411. In this way, the first conversion module 1413 can convert the first power signal into an alternating current signal, and transmit the alternating current signal to the first coil 1411.

[0112] In some embodiments, reference Figure 6b As shown, since the induced electric signal generated by the second coil 1412 is also an AC signal, when the second power signal acquired by the second power module 19 is a DC signal, the power isolation submodule 141 may further include a second conversion module 1414, one end of the second conversion module 1414 is electrically connected to the second coil 1412, and the other end is electrically connected to the second power module 19. In this way, the second conversion module 1414 can convert the AC signal induced by the second coil 1412 into a DC second power signal, and transmit the second power signal to the second power module 19.

[0113] The above-mentioned bioelectric signal isolation submodule 142 includes a first bioelectric signal transmitter 1421, a third coil 1422, a fourth coil 1423 and a first bioelectric signal receiver 1424. Since the processing module 17 cannot identify the second bioelectric signal collected by the second bioelectric signal acquisition module 12, it is necessary to convert the second bioelectric signal into a third bioelectric signal with the first ground signal as a reference signal, so that the processing module 17 can identify the bioelectric signal. Therefore, the electrical signal isolation module 14 includes a bioelectric signal isolation submodule 142. The bioelectric signal isolation submodule 142 includes a first bioelectric signal transmitter 1421, a third coil 1422, a fourth coil 1423 and a first bioelectric signal receiver 1424. The first bioelectric signal transmitter 1421 is electrically connected to the second bioelectric signal acquisition module 12, so that the second bioelectric signal acquisition module 12 can transmit the second bioelectric signal collected by it to the first bioelectric signal transmitter 1421. In some embodiments, the second bioelectric signal output by the second bioelectric signal acquisition module 12 is a digital signal, and the first bioelectric signal transmitter 1421 can generate a first analog signal of a first frequency based on the received second bioelectric signal, and output the first analog signal to the third coil 1422. In other embodiments, the second bioelectric signal collected by the second bioelectric signal acquisition module 12 may also be an analog signal. In this case, the first bioelectric signal transmitter 1421 can convert the received second bioelectric signal into a first analog signal of a first frequency, and transmit the first analog signal to the third coil 1422. After receiving the first analog signal, the third coil 1422 can generate a changing magnetic field based on the first analog signal, so that the part of the fourth coil 1423 located in the changing magnetic field can induce the generation of a second analog signal, and transmit the second analog signal to the first bioelectric signal receiver 1424. After receiving the second analog signal, the first bioelectric signal receiver 1424 can convert the second analog signal into a third bioelectric signal with the first ground signal as a reference signal, and transmit the third bioelectric signal to the processing module 17.

[0114] That is to say, the electrical signal isolation module 14 can generate signals by induction through electromagnetic coupling, thereby achieving signal isolation.

[0115] Normally, the communication between the second signal acquisition module 12 and the processing module 17 can be carried out in the form of SPI. At this time, when the second bioelectric signal acquisition module 12 transmits the collected second bioelectric signal to the processing module 17, the processing module 17 needs to send a corresponding control signal to the second bioelectric signal acquisition module 12, and the second bioelectric signal acquisition module 12 outputs the second bioelectric signal under the control of the control signal.

[0116] Based on this, in the embodiments of the present application, Figure 7As shown, the electrical signal isolation module 14 further includes at least one control signal isolation submodule 143 .

[0117] For each control signal isolation submodule 143, the control signal isolation submodule 143 includes a second bioelectric signal transmitter 1431, a fifth coil 1432, a sixth coil 1433 and a second bioelectric signal receiver 1434; the second bioelectric signal transmitter 1431 is electrically connected to the processing module 17 and the first ground terminal 15, the fifth coil 1432 is electrically connected to the second bioelectric signal transmitter 1431, the sixth coil 1433 is electrically connected to the second bioelectric signal receiver 1434, and the second bioelectric signal receiver is electrically connected to the second bioelectric signal acquisition module 12 and the second ground terminal 16.

[0118] The processing module 17 is further used to send a first control signal to the second bioelectric signal transmitter 1431 for controlling the second bioelectric signal acquisition module 12 to acquire the second bioelectric signal.

[0119] The second bioelectric signal transmitter 1431 is used to generate a third analog signal based on the first control signal sent by the processing module 17 .

[0120] The sixth coil 1433 is used to induce a fourth analog signal based on the third analog signal transmitted by the fifth coil 1432 , and send the fourth analog signal to the second bioelectric signal receiver 1434 .

[0121] The second bioelectric signal receiver 1434 is used to convert the fourth analog signal into a second control signal and transmit it to the second bioelectric signal acquisition module 12, so that the second bioelectric signal acquisition module 12 acquires the second bioelectric signal based on the second control signal.

[0122] In the embodiment of the present application, since the processing module 17 needs to send a control signal to the second bioelectric signal acquisition module 12 to control the second bioelectric signal acquisition module 12 to perform signal acquisition. Since the power supply terminal and the ground terminal between the processing module 17 and the second bioelectric signal acquisition module 12 are different, the first control signal output by the processing module 17 cannot be recognized by the second bioelectric signal acquisition module 12, and the first control signal needs to be converted into a second control signal with the second ground signal as the reference signal. Since the processing module 17 may send at least one control signal to the second bioelectric signal acquisition module 12, the electrical signal isolation module 14 includes at least one control signal isolation submodule 143. At least one control signal isolation submodule 143 is used to transmit at least one control signal, and different control signal isolation submodules 143 transmit different control signals. For example, when the communication between the second signal acquisition module 12 and the processing module 17 can be carried out via SPI, the control signal includes a clock signal, a chip select signal, a data signal output by the processing module 17, and a data ready signal. The electrical signal isolation module 14 includes four control signal isolation sub-modules 143, which are respectively used to transmit the clock signal, the chip select signal, the data signal output by the processing module 17, and the data ready signal.

[0123] At this time, for each control signal isolation submodule 143, the control signal isolation submodule 143 includes a second bioelectric signal transmitter 1431, a fifth coil 1432, a sixth coil 1433 and a second bioelectric signal receiver 1434. The second bioelectric signal transmitter 1431 is electrically connected to the processing module 17 and the first ground terminal 15. The second bioelectric signal transmitter 1431 receives the first control signal output by the processing module 17. In the communication case, the first control signal is a digital signal. The second bioelectric signal transmitter 1431 is electrically connected to the first ground terminal 15, can identify the first control signal, and convert the first control signal from a digital signal to a third analog signal. The third analog signal is transmitted to the fifth coil 1432. After the fifth coil 1432 receives the third analog signal, a changing magnetic field can be generated according to the third analog signal. The sixth coil 1433 generates a fourth analog signal by partial induction of the changing magnetic field. The sixth coil 1433 can transmit the fourth analog signal to the second bioelectric signal receiver 1434. The second bioelectric signal receiver 1434 can use the second ground signal as a reference signal to convert the fourth analog signal into a second control signal, and transmit the second control signal to the second bioelectric signal acquisition module 12. The second bioelectric signal acquisition module 12 can collect the second bioelectric signal according to the second control signal, and transmit the second bioelectric signal to the processing module 17 through the electrical signal isolation module 14.

[0124] In some embodiments, the power isolation submodule 141, the bioelectric signal isolation submodule 142, and at least one control signal isolation submodule 143 in the electrical signal isolation module 14 can be integrated into one chip. In other embodiments, due to the limited number of pins of a single chip, the power isolation submodule 141, the bioelectric signal isolation submodule 142, and part of the control signal isolation submodule 143 in the electrical signal isolation module 14 are integrated into one chip, and the other part of the control signal isolation submodule 143 is integrated into another chip.

[0125] As a possible implementation method, the above multi-modal bioelectric signal crosstalk prevention acquisition circuit is as follows: Figure 8 As shown, it also includes: a third bioelectric signal acquisition module 20.

[0126] The third bioelectric signal acquisition module 20 is electrically connected to the electrical signal isolation module 14 and the second ground terminal 16 .

[0127] The electrical signal isolation module 14 is further used to provide a second power supply signal to the third bioelectric signal acquisition module 20 .

[0128] The third bioelectric signal acquisition module 20 is used to acquire the fifth bioelectric signal.

[0129] The fifth bioelectric signal is a bioelectric signal other than the first bioelectric signal and the second bioelectric signal.

[0130] In an embodiment of the present application, the multimodal bioelectric signal anti-crosstalk acquisition circuit may also include acquisition modules for other bioelectric signals, for example, a third bioelectric signal acquisition module 20. The fifth bioelectric signal acquired by the third bioelectric signal acquisition module 20 may be a signal of the same type as the second bioelectric signal and of a different type from the first bioelectric signal, that is, the fifth bioelectric signal and the second bioelectric signal are both output signals, and the first bioelectric signal is an input signal. That is, the fifth bioelectric signal and the second bioelectric signal are both signals directly obtained by collecting the subject, without the need to input an electrical signal to the subject. The first bioelectric signal requires a tiny power signal to be input to the subject before the first bioelectric signal can be collected. Therefore, there will be no crosstalk between the fifth bioelectric signal and the second bioelectric signal. At this time, the second bioelectric signal acquisition module 12 and the third bioelectric signal acquisition module 20 can share the power supply terminal and the ground terminal. That is to say, the third bioelectric signal acquisition module 20 is electrically connected to the electrical signal isolation module 14 and the second ground terminal 16, so that the electrical signal isolation module 14 can transmit the second power supply signal to the third bioelectric signal acquisition module 20 to power the third bioelectric signal acquisition module 20. The third bioelectric signal acquisition module 20 can use the second ground signal as a reference signal to acquire the fifth bioelectric signal.

[0131] In some embodiments, the third bioelectric signal acquisition module 20 can be electrically connected to the processing module 17 via the electrical signal isolation module 14. In this way, the third bioelectric signal acquisition module 20 can convert the fifth bioelectric signal it collects into a sixth bioelectric signal with the first ground signal as a reference signal through the electrical signal isolation module 14, and the processing module 17 can obtain the sixth bioelectric signal and perform corresponding processing according to the first bioelectric signal, the third bioelectric signal and the sixth bioelectric signal.

[0132] The third bioelectric signal acquisition module 20 can be electrically connected to the processing module 17 through the electrical signal isolation module 14, and the process of signal transmission can refer to the above-mentioned second bioelectric signal acquisition module 20 can be electrically connected to the processing module 17 through the electrical signal isolation module 14, and the process of signal transmission will not be repeated here.

[0133] As a possible implementation, the first bioelectric signal includes a skin electrical signal; the second bioelectric signal includes other bioelectric signals except the skin electrical signal. That is, the first bioelectric signal is an input-type collected bioelectric signal. The second bioelectric signal is an output-type collected bioelectric signal. Among them, the input-type collected bioelectric signal refers to a bioelectric signal that can only be collected after a tiny power signal is input to the subject when the bioelectric signal is collected. The output-type collected bioelectric signal refers to a bioelectric signal that can be collected without inputting a tiny power signal to the subject when the bioelectric signal is collected.

[0134] As a possible implementation method, the first bioelectric signal includes an EDA signal, the second bioelectric signal includes one of an EEG signal, an EMG (Electromyography), and an ECG (Electrocardiogram) signal; the fifth bioelectric signal includes another of an EEG signal, an EMG signal, and an ECG signal.

[0135] As a possible implementation, the above signal acquisition circuit, such as Fig. 9 As shown, it also includes: a first voltage conversion module 21.

[0136] One end of the first voltage conversion module 21 is electrically connected to the first power supply module 13 , and the other end of the first voltage conversion module 21 is electrically connected to the first bioelectric signal acquisition module 11 .

[0137] The first voltage conversion module 21 is used for converting the first power supply signal into a first target electrical signal, and transmitting the first target electrical signal to the first bioelectric signal acquisition module 11 to supply power to the first bioelectric signal acquisition module 11 .

[0138] In some embodiments, the first power signal acquired by the first power module 13 is not the electrical signal required by the first bioelectric signal acquisition module 11. In this case, the first voltage conversion module 21 can convert the first power signal into the electrical signal required by the first bioelectric signal acquisition module 11. That is, one end of the first voltage conversion module 21 is electrically connected to the first power module 13, so that the first power module 13 can transmit the first power signal to the first voltage conversion module 21. The first voltage conversion module 21 can convert the first power signal into the first target electrical signal required by the first bioelectric signal acquisition module 11. The other end of the first voltage conversion module 21 is electrically connected to the first bioelectric signal acquisition module 11, so that the first voltage conversion module 21 can transmit the first target electrical signal to the first bioelectric signal acquisition module 11 to power the first bioelectric signal acquisition module 11.

[0139] It should be understood that parameter information of the first target electrical signal may be pre-set in the first voltage conversion module 21, so that the first voltage conversion module 21 may convert the first power signal into the first target electrical signal according to the parameter information of the first target electrical signal.

[0140] As a possible implementation, Fig.10 As shown, the first bioelectric signal acquisition module 11 includes a signal acquisition terminal 111 , a signal amplifier 112 and an analog-to-digital signal converter 113 .

[0141] The signal acquisition terminal 111 is electrically connected to the input terminal of the signal amplifier 112 , the output terminal of the signal amplifier 112 is electrically connected to the input terminal of the analog-to-digital signal converter 113 , and the output terminal of the analog-to-digital signal converter 113 is electrically connected to the processing module 17 .

[0142] That is, the first bioelectric signal acquisition module 11 includes a signal acquisition terminal 111, a signal amplifier 112 and an analog-to-digital signal converter 113. The signal acquisition terminal 111 can acquire the first bioelectric signal, and the signal acquisition terminal 111 is electrically connected to the input terminal of the signal amplifier 112. In this way, the signal acquisition terminal 111 can transmit the acquired first bioelectric signal to the signal amplifier 112. The signal amplifier 112 amplifies the first bioelectric signal. The output terminal of the signal amplifier 112 is electrically connected to the input terminal of the analog-to-digital signal converter 113. In this way, the signal amplifier 112 transmits the amplified first bioelectric signal to the analog-to-digital signal converter 113. Since the first bioelectric signal acquired by the signal acquisition terminal is an analog signal, and the processing module 17 needs to obtain a digital signal. Therefore, the analog-to-digital signal converter 113 can convert the amplified first bioelectric signal from an analog signal to a digital signal. The output terminal of the analog-to-digital signal converter 113 is electrically connected to the processing module 17, so the analog-to-digital signal converter 113 can transmit the first bioelectric signal converted into a digital signal to the processing module 17.

[0143] In the embodiment of the present application, the multimodal bioelectric signal anti-crosstalk acquisition circuit includes not only the first bioelectric signal acquisition module, but also the second bioelectric signal acquisition module, so that the first bioelectric signal and the second bioelectric signal can be acquired simultaneously, and different ground signals and power signals can be provided for the first bioelectric signal acquisition module and the second bioelectric signal acquisition module in the signal acquisition circuit, so that the first bioelectric signal acquisition module and the second bioelectric signal acquisition module will not interfere with each other due to the difference in power signal and ground signal when they are acquiring the first bioelectric signal and the second bioelectric signal at the same time. That is, the multimodal bioelectric signal anti-crosstalk acquisition circuit provided in the embodiment of the present application, when acquiring the first bioelectric signal and the second bioelectric signal at the same time, will not cause crosstalk due to the isolation between the power signal and the ground signal between the first bioelectric signal acquisition module and the second bioelectric signal acquisition module, thereby reducing the complexity of the multimodal bioelectric signal anti-crosstalk acquisition circuit in acquiring the first bioelectric signal and the second bioelectric signal, and improving the efficiency and accuracy of bioelectric signal acquisition.

[0144] Corresponding to the above-mentioned embodiments, the present application also provides a chip, which includes the multimodal bioelectric signal anti-crosstalk acquisition circuit described in the above-mentioned embodiments.

[0145] Corresponding to the above-mentioned embodiments, the present application also provides a wearable multi-device, which includes a shell, a multimodal bioelectric signal anti-crosstalk acquisition circuit or chip described in the above-mentioned embodiments arranged in the shell, a first bioelectric signal sensor, and a second bioelectric signal sensor. Among them, the first bioelectric signal sensor is used to contact with the subject to collect the first bioelectric signal of the subject, and transmit the first bioelectric signal to the first bioelectric signal acquisition module in the multimodal bioelectric signal anti-crosstalk acquisition circuit or chip. The second bioelectric signal sensor is used to contact with the subject to collect the second bioelectric signal of the subject, and transmit the second bioelectric signal to the second bioelectric signal acquisition module in the multimodal bioelectric signal anti-crosstalk acquisition circuit or chip.

[0146] The following description is given by taking the case where the second bioelectric signal is an EEG signal, the first bioelectric signal is an EDA signal, and the wearable device includes the multimodal bioelectric signal anti-crosstalk acquisition circuit described in the above embodiment as an example.

[0147] The embodiment of the present application provides a wearable device. The wearable device includes a housing, an integrated main body arranged in the housing, an EEG signal electrode, an electrical signal isolation module, a first GND (Ground) electrode, a second GND electrode, an EDA signal electrode, etc. arranged on the inner side of the main body.

[0148] In the above embodiment, the main cable is buried inside the device, which can reduce the interference and influence of external cables, and at the same time is more convenient to use and more comfortable. The cable is buried inside the device, which can reduce the signal quality loss and noise interference during the transmission process, thereby improving the precision and accuracy of data collection, and further improving the efficiency of data processing and analysis. The integrated design can make the device lighter, more compact, easy to carry and use, and suitable for data collection needs in various occasions.

[0149] Furthermore, the EEG signal electrode corresponds to at least one brain region of the subject's frontal lobe, parietal lobe, temporal lobe and occipital lobe, and includes a plurality of guide electrodes for collecting EEG signals to reflect the neuronal discharge state and functional activity of the subject's brain.

[0150] The frontal lobe, parietal lobe, temporal lobe and occipital lobe are four important brain regions of the human brain, which play a key role in human cognition, perception, emotion and language. The frontal lobe is located in the front of the brain and is one of the largest lobes. It is involved in human advanced cognitive functions such as decision-making, planning, thinking, reasoning and problem solving. The frontal lobe is also related to human personality, behavior control and social interaction. In addition, the frontal lobe controls the execution of movement, including muscle coordination, posture control and voluntary movement. The parietal lobe is located in the middle part of the brain and is mainly responsible for processing sensory information and spatial cognition. It is related to the reception and processing of sensory signals such as touch, temperature, pressure and pain. In addition, the parietal lobe is also involved in functions such as spatial orientation, motor control and hand-eye coordination. The temporal lobe is located on the side of the brain and is involved in functions such as hearing, memory, language comprehension, emotion and facial recognition. The main structure of the temporal lobe is the hippocampus, which plays an important role in memory formation and storage. In addition, the temporal lobe is also closely related to the regulation of emotions, auditory processing and language comprehension. The occipital lobe is located in the back of the brain and is mainly responsible for the processing and perception of visual information. It receives visual signals from the eyes and converts them into the images we see. The occipital lobe is also involved in functions such as visual memory, color perception, and spatial orientation. It is important to note that the functions of these brain regions are interrelated and interactive, and the brain's cognitive processes often involve the coordinated work of multiple brain regions. In addition, the brain structure and function may vary from person to person, so the specific functional details may vary.

[0151] The EEG signal electrodes of the wearable device in the embodiment of the present application correspond to at least one of the above-mentioned brain regions. By placing corresponding electrodes in these brain regions, signals such as electrical activity, blood oxygenation level or magnetic field in different brain regions can be obtained, so as to study brain function and cognitive process, which is of great significance for understanding the working principle of the brain and developing applications such as brain-computer interface.

[0152] The main body is in a ring structure, so that several dry electrodes of the EEG signal electrode can correspond to the two brain areas of the frontal lobe and the occipital lobe to check the EEG signals of these two lobe areas, but it is not limited to this. For example, the main body can also be in a helmet-shaped structure or a triangular arc edge (adding an arc edge between the ring structures) to detect EEG signals in more areas. The EEG signal electrode is used to collect electroencephalogram (EEG) signals in the frontal lobe, parietal lobe, temporal lobe and occipital lobe of the subject. These dry electrodes are installed in specific positions to record the discharge activity and functional activity of brain neurons. By collecting and analyzing these EEG signals, we can understand the activity patterns of the brain under different tasks, states and stimuli, and then study the functions and processes of cognition, emotion, sleep and other aspects.

[0153] Furthermore, the wearable device includes an energy storage module, which is used to store the electrical energy required for the wearable device to collect and operate. The energy storage module can be a built-in battery or a rechargeable battery, which is used to power the device. Through the energy storage module, the device can be disconnected from an external power source, providing portability and flexibility.

[0154] It should be understood that the wearable device may also include a power plug electrically connected to an external power source. In this case, the wearable device can obtain the electrical energy required for the wearable device to collect and operate through the power plug, and the embodiments of the present application are not limited to this.

[0155] For the convenience of description, the following description is given by taking a wearable device including an energy storage module as an example.

[0156] The power signal required for the operation of the wearable device that can be obtained by the energy storage module is the first bioelectric signal. The electrical signal isolation module can obtain the second power signal through electromagnetic coupling according to the first power signal, and power the EEG signal electrode through the second power signal.

[0157] Furthermore, the EDA signal electrode includes at least one EDA electrode for collecting the subject's skin electrical response signal to reflect the activity state of the autonomic nervous system. Skin electrical response is an indicator of autonomic nervous system activity, also known as electrical activity or skin conductance, which reflects the human body's emotional and cognitive response to external stimuli. The wearable device can power the EDA signal electrode through the first power signal.

[0158] Compared with the EDA signal electrodes in the prior art, which are usually placed on the skin surface of the subject's fingers, palms or wrists, the EDA signal electrodes in the embodiment of the present application are integrated on the main body 1 and can be located in the forehead area without hair cover to record the skin electrical response signal. These EDA signal electrodes can sense the changes in skin conductance caused by sweat secretion. When the human body faces emotional arousal, stress, anxiety or other emotional states, the activity of the autonomic nervous system can cause changes in sweat secretion, thereby affecting skin conductance. By collecting and analyzing EDA signals, researchers can infer the emotional state, cognitive load, stress level, etc. of the subjects, which is very useful for psychological research, emotion recognition, human-computer interaction and other fields. It should be noted that the correct placement and use of EDA signal electrodes is crucial to data quality and result interpretation. Ensure that the electrodes are in close contact with the skin and avoid external factors that interfere with the signal, such as movement or electromagnetic interference, to obtain accurate and reliable EDA signals. Optionally, two or more EDA signal electrodes may be provided.

[0159] Furthermore, the wearable device includes a first GND electrode (Ground) and a second GND electrode. The second GND electrode is located at the center of the forehead arc segment. The first GND electrode is a first ground electrode, which is used to provide a reference potential for the EDA signal electrode and reduce external interference. The second GND electrode is a second ground electrode, which is used to provide a reference potential for the EEG signal electrode and reduce external interference.

[0160] The first GND electrode provides a first reference potential for measuring the potential difference recorded by the other EDA signal electrodes.

[0161] The second GND electrode provides a reference potential for measuring the potential difference recorded by other EEG signal electrodes. Placing the second GND electrode in the center of the forehead arc segment 11 can serve as a good reference point to provide a stable reference potential. One of the functions of the second GND electrode is to reduce the impact of external environmental interference on EEG signals. Placing the second GND electrode in the center of the forehead arc segment can minimize noise and interference from the surrounding environment and improve the purity of the signal. Placing the second GND electrode in the center of the forehead arc segment can achieve better wearing balance and stability, making the user feel more comfortable during wearing.

[0162] In this way, the power signal of the EEG signal electrode in the wearable device is provided by the electrical signal isolation module, and the ground signal is provided by the second GND electrode. The power signal of the EDA signal electrode is provided by the energy storage module, and the ground signal is provided by the first GND electrode. The power supply terminal and the grounding terminal of the EEG signal electrode and the EDA signal electrode in the wearable device are different, that is, the wearable device isolates the power supply terminal and the grounding terminal of the EEG signal electrode from the EDA signal electrode. In this way, when the EDA signal electrode performs signal acquisition, a tiny power signal is input to the subject, which will not be collected by the EEG signal electrode. When the wearable device simultaneously collects EEG signals and EDA signals, the EEG signals and the EDA signals are isolated from each other and will not cause interference with each other, so that the signals collected simultaneously by the wearable device are more accurate.

[0163] The above embodiments are for illustration only, and the number and layout of the stem electrodes can be selected according to the research needs and experimental design. It should be noted that EEG signals in different brain regions have different characteristics and meanings, so it is very important to choose the appropriate stem electrode position in the study. Depending on the purpose of the study, other specific brain regions may be selected to observe the corresponding EEG activity and further analyze its association with specific behaviors, cognitive functions or disease states.

[0164] In some embodiments, the wearable device further includes a processor. The processor is electrically connected to the energy storage module, the energy storage module can power the processor, and the processor can be electrically connected to the first GND electrode. In other words, the processor can have the same power supply terminal and ground terminal as the EDA signal electrode. At this time, the processor can be directly electrically connected to the EDA signal electrode, and the EDA signal electrode can send the collected EDA signal to the processor.

[0165] Since the power supply terminal and the ground terminal between the processor and the EEG signal electrode are different, the processor cannot recognize the EEG signal collected by the EEG signal electrode. In order to send the EEG signal collected by the EEG signal electrode to the processor, the EEG signal electrode can convert the EEG signal into an EEG signal with the first reference potential as the reference signal through the electrical signal isolation module, and send the converted EEG signal to the processor so that the processor can perform corresponding processing based on the EEG signal and the EDA signal, so as to fully reflect the physiological state and activity behavior of the subject.

[0166] In the above embodiments, the wearable device can be an integrated structure, such as a helmet or head cap with a head-mounted structure, with small disturbance error and good stability during signal transmission; and the device can simultaneously collect EEG signals and EDA signals, and the EEG signals and EDA signals are isolated from each other and do not crosstalk with each other. The EEG signals and EDA signals collected by the wearable device are relatively accurate and can fully reflect the physiological state and activity behavior of the subject.

[0167] Those skilled in the art can clearly understand that the technology in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on this understanding, the technical solution in the embodiments of the present invention is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a disk, an optical disk, etc., and includes a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention or some parts of the embodiments.

[0168] In this specification, the same or similar parts between the various embodiments can be referred to each other. In particular, for the device embodiment and the terminal embodiment, since they are basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description in the method embodiment.

Claims

1. A multimodal bioelectric signal crosstalk prevention acquisition circuit, characterized in that: include: A first bioelectric signal acquisition module, a second bioelectric signal acquisition module, a first power supply module, an electrical signal isolation module, a first ground terminal, and a second ground terminal; The first power supply module and the first bioelectric signal acquisition module are electrically connected, and the first power supply module is used to obtain a first power supply signal and provide the first power supply signal to the first bioelectric signal acquisition module to supply power to the first bioelectric signal acquisition module; The first ground terminal is used to provide a first ground signal; The second ground terminal is used to provide a second ground signal, wherein the second ground signal is different from the first ground signal; The first bioelectric signal acquisition module is electrically connected to the first ground terminal, and the first bioelectric signal acquisition module is used to acquire a first bioelectric signal; the first bioelectric signal uses the first ground signal as a reference signal; The electrical signal isolation module is electrically connected to the first power supply module and the second bioelectric signal acquisition module; the electrical signal isolation module is used to convert the first power supply signal provided by the first power supply module into a second power supply signal, and provide the second power supply signal to the second bioelectric signal acquisition module to power the second bioelectric signal acquisition module; the first power supply signal is different from the second power supply signal; The second bioelectric signal acquisition module is electrically connected to the second ground terminal, and the second bioelectric signal acquisition module is used to acquire a second bioelectric signal, and at least part of the time when the first bioelectric signal acquisition module acquires the first bioelectric signal coincides with at least part of the time when the second bioelectric signal acquisition module acquires the second bioelectric signal; wherein, the second bioelectric signal and the first bioelectric signal are bioelectric signals of different types, and the second bioelectric signal uses the second ground signal as a reference signal; the first ground signal is different from the second ground signal.

2. The circuit according to claim 1, characterized in that Also includes: Processing module; The processing module is electrically connected to the first bioelectric signal acquisition module, the first power supply module, the first ground terminal and the electrical signal isolation module; The first power supply module is further used to provide a first power supply signal to the processing module; The electrical signal isolation module is further used to convert the second bioelectric signal collected by the second bioelectric signal collection module into a third bioelectric signal; the third bioelectric signal uses the first ground signal as a reference signal; The processing module is used to obtain the first bioelectric signal and the third bioelectric signal collected by the first bioelectric signal collection module, and perform corresponding processing on the first bioelectric signal and the third bioelectric signal.

3. The circuit according to claim 2, characterized in that Also includes: Storage module; The storage module is electrically connected to the processing module, and the storage module is used to store the data collected by the signal collection circuit offline.

4. The circuit according to claim 2, characterized in that Also includes: A second power supply module; The second power supply module is electrically connected to the electrical signal isolation module and the second bioelectric signal acquisition module; The second power supply module is used to obtain the second power supply signal output by the electrical signal isolation module, and supply power to the second bioelectric signal acquisition module based on the second power supply signal.

5. The circuit according to claim 4, characterized in that The electrical signal isolation module includes a power isolation submodule and a bioelectrical signal isolation submodule; The power isolation submodule includes a first coil and a second coil, the first coil is electrically connected to the first power module, and the second coil is electrically connected to the second power module, wherein the second coil is used to induce a second power signal based on the first power signal transmitted by the first coil, and send the second power signal to the second power module; The bioelectric signal isolation submodule includes a first bioelectric signal transmitter, a third coil, a fourth coil and a first bioelectric signal receiver; the first bioelectric signal transmitter is electrically connected to the second bioelectric signal acquisition module and the second ground terminal, the third coil is electrically connected to the first bioelectric signal transmitter, the fourth coil is electrically connected to the first bioelectric signal receiver, and the first bioelectric signal receiver is electrically connected to the processing module and the first ground terminal; Wherein, the first bioelectric signal transmitter is used to generate a first analog signal based on the second bioelectric signal collected by the second bioelectric signal collection module; The fourth coil is used for inducing a second analog signal based on the first analog signal transmitted by the third coil, and sending the second analog signal to the first bioelectric signal receiver; The first bioelectric signal receiver is used to convert the second analog signal into a third bioelectric signal and transmit it to the processing module.

6. The circuit according to claim 5, characterized in that The electrical signal isolation module also includes at least one control signal isolation submodule; For each control signal isolation submodule, the control signal isolation submodule includes a second bioelectric signal transmitter, a fifth coil, a sixth coil and a second bioelectric signal receiver; the second bioelectric signal transmitter is electrically connected to the processing module and the first ground terminal, the fifth coil is electrically connected to the second bioelectric signal transmitter, the sixth coil is electrically connected to the second bioelectric signal receiver, and the second bioelectric signal receiver is electrically connected to the second bioelectric signal acquisition module and the second ground terminal; Wherein, the processing module is further used to send a first control signal for controlling the second bioelectric signal acquisition module to acquire the second bioelectric signal to the second bioelectric signal transmitter; The second bioelectric signal transmitter is used to generate a third analog signal based on the first control signal sent by the processing module; The sixth coil is used for inducing a fourth analog signal based on the third analog signal transmitted by the fifth coil, and sending the fourth analog signal to the second bioelectric signal receiver; The second bioelectric signal receiver is used to convert the fourth analog signal into a second control signal and transmit it to the second bioelectric signal acquisition module, so that the second bioelectric signal acquisition module acquires the second bioelectric signal based on the second control signal.

7. The circuit according to claim 1, characterized in that Also includes: Processing module; The processing module is electrically connected to the second bioelectric signal acquisition module, the second ground terminal and the electrical signal isolation module; The electrical signal isolation module is further used to transmit the second power supply signal to the processing module, and convert the first bioelectric signal collected by the first bioelectric signal collection module into a fourth bioelectric signal; the fourth bioelectric signal uses the second ground signal as a reference signal; The processing module is used to obtain the second bioelectric signal and the fourth bioelectric signal collected by the second bioelectric signal collection module, and perform corresponding processing on the second bioelectric signal and the fourth bioelectric signal.

8. The circuit according to claim 1, characterized in that Also includes a third bioelectric signal acquisition module; The third bioelectric signal acquisition module is electrically connected to the electrical signal isolation module and the second grounding terminal; The electrical signal isolation module is further used to provide a second power supply signal to the third bioelectric signal acquisition module; The third bioelectric signal acquisition module is used to acquire a fifth bioelectric signal; the fifth bioelectric signal is a signal of the same type as the second bioelectric signal and of a different type from the first bioelectric signal.

9. The circuit according to any one of claims 1 to 8, characterized in that: The first bioelectric signal includes an input acquisition type bioelectric signal; the second bioelectric signal includes an output acquisition type bioelectric signal.

10. The circuit according to claim 9, characterized in that The first bioelectric signal includes an electrical skin activity signal (EDA) signal, the second bioelectric signal includes one of an EEG signal, an EMG signal, and an ECG signal; the fifth bioelectric signal includes another of an EEG signal, an EMG signal, and an ECG signal.

11. The circuit according to any one of claims 1 to 8, characterized in that: The first bioelectric signal acquisition module includes a signal acquisition terminal, a signal amplifier and an analog-to-digital signal converter; The signal acquisition end is electrically connected to the input end of the signal amplifier, the output end of the signal amplifier is electrically connected to the input end of the analog-to-digital signal converter, and the output end of the analog-to-digital signal converter is electrically connected to the processing module.

12. A chip, characterized in that: It comprises the multimodal bioelectric signal crosstalk prevention acquisition circuit as described in any one of claims 1-11.

13. A wearable device, characterized in that: It includes a shell, and a multimodal bioelectric signal anti-crosstalk acquisition circuit as described in any one of claims 1 to 11 arranged in the shell, or includes a chip as described in claim 12, a first bioelectric signal sensor, and a second bioelectric signal sensor; wherein the first bioelectric signal sensor is used to collect the first bioelectric signal of the subject and transmit it to the circuit as described in any one of claims 1 to 11 or the first bioelectric signal acquisition module in the chip as described in claim 12; the second bioelectric signal sensor is used to collect the second bioelectric signal of the subject and transmit it to the circuit as described in any one of claims 1 to 11 or the second bioelectric signal acquisition module in the chip as described in claim 12.

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