Brain-hand physiological information acquisition device

Abstract

The utility model relates to the related technical field of physiological information acquisition devices, and provides a brain-hand physiological information acquisition device which comprises a first measuring column and a second measuring column, and impedance electrodes, fingerprint sensors and frontal print sensors are arranged on the first measuring column and the second measuring column; the first measuring column and the second measuring column are respectively arranged at a first position and a second position of a human head; the device further comprises an excitation source and a common electrode connected with the excitation source, the common electrode is arranged at the third position of the human head, and the common electrode and impedance electrodes arranged on the first measuring column and the second measuring column form a hand and brain impedance measuring loop through the human head and the hand. Signal measuring electrodes can be arranged on the upper surface and the lower surface of the measuring column of the device, and meanwhile, the types of collected data are enriched by combining hand fingerprints and head frontal print information. A single device can realize measurement of a plurality of signals, and the portability is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of physiological information acquisition devices, specifically to a brain-hand physiological information acquisition device. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Synchronous brain-hand physiological information acquisition can be applied in fields such as military, sports, entertainment, and home appliances, including flight training, shooting training, gaming experiences, and identity verification. Physiological information acquisition enables a better understanding of the body's internal mechanisms and changes, providing more personalized and precise medical diagnosis, treatment, and rehabilitation.

[0004] The inventors discovered in their research that current physiological information acquisition devices focus more on physiological signals from a single location, such as collecting EEG signals alone. The signals are singular, and different devices are needed to collect different physiological information. Existing devices have low integration and cannot provide multiple physiological state detections with the same device.

[0005] Different physiological signal acquisition devices typically need to be used separately. For example, to simultaneously acquire EEG and forehead wrinkle signals, users need to wear two separate devices, increasing hardware costs and complexity. Using multiple devices simultaneously takes up more space, increases the user's burden, and reduces user comfort and convenience. Especially in military training, sports competitions, or interactive entertainment, highly portable and comfortable devices are crucial for user operation. However, current low-integration devices struggle to meet these needs. Utility Model Content

[0006] To address the aforementioned problems, this invention proposes a brain-hand physiological information acquisition device that can acquire fingerprint, forehead vein, EEG signals, and brain-hand impedance signals on the same device. The device can acquire multiple signals, improving the comfort and convenience of the user experience.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] One or more embodiments provide a brain-hand physiological information acquisition device, including a first measuring column and a second measuring column, wherein an impedance electrode, a fingerprint sensor and a forehead fingerprint sensor are disposed on the first measuring column and the second measuring column;

[0009] The first and second measuring columns are respectively set at the first and second positions on the human head;

[0010] It also includes an excitation source and a common electrode connected to the excitation source. The common electrode is set at a third position on the human head. The common electrode and the impedance electrode set on the first and second measuring columns form a hand and brain impedance measurement circuit through the human head and hand.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention relates to a device with a first and a second measuring column. Signal measuring electrodes can be installed on both the upper and lower surfaces of the measuring columns. By combining fingerprint and forehead fingerprint information, the types of data collected are enriched. The common electrode further enables impedance measurement between the hand and brain, allowing the introduction of an excitation signal to form a hand-brain impedance measurement circuit. The measuring device has a simple structure, can measure multiple signals with a single device, and offers significantly improved portability.

[0013] The advantages and additional benefits of this utility model will be described in detail in the following specific embodiments. Attached Figure Description

[0014] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute a limitation thereof.

[0015] Figure 1 This is a schematic diagram showing the installation location of the synchronous acquisition device according to an embodiment of the present invention;

[0016] Figure 2(a) is a schematic diagram of the synchronous acquisition device according to an embodiment of the present invention;

[0017] Figure 2(b) is a schematic diagram of the impedance test circuit of the synchronous acquisition device according to an embodiment of the present invention;

[0018] Figure 3 This is a structural block diagram of the data processing section of an embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram showing the relative positions of the fingerprint sensor 1 and the impedance electrode 3 on the first measuring post 9 according to an embodiment of the present invention.

[0020] Figure 5(a) is a first circuit diagram of the filter according to an embodiment of the present invention;

[0021] Figure 5(b) is a second circuit diagram of the filter according to an embodiment of the present invention;

[0022] Figure 6 This is a pinout diagram and peripheral circuit diagram of the ADS1299 chip used in this embodiment of the utility model;

[0023] Figure 7 This is a pinout diagram of the MCU chip and its peripheral circuitry according to an embodiment of this utility model.

[0024] Among them: 1. Fingerprint sensor, 2. Forehead fingerprint sensor, 3. Impedance electrode, 4. EEG electrode, 5. Skin surface, 6. Temple position, 7. Forehead position, 8. Second measuring column, 9. First measuring column, 10. Common electrode, 11. Fourth filter, 12. Third filter, 13. Arm. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] In one or more of the technical solutions disclosed in the embodiments, such as Figures 1 to 6 As shown, a brain-hand physiological information acquisition device includes: a first measuring column 9 and a second measuring column 8, wherein an impedance electrode 3, a fingerprint sensor 1 and a forehead fingerprint sensor 2 are disposed on the first measuring column 9 and the second measuring column 8;

[0029] The first measuring column 9 and the second measuring column 8 are respectively set at the first position and the second position of the human head; it also includes an excitation source and a common electrode 10 connected to the excitation source. The common electrode 10 is set at the third position of the human head. The common electrode 10 and the impedance electrode 3 set on the first measuring column 9 and the second measuring column 8 form a brain-hand impedance measurement circuit through the human head and hand.

[0030] In this embodiment, the brain-hand impedance measurement circuit formed by the common electrode 10 and the impedance electrode 3 is used to measure the impedance signal between the brain and the hand. An excitation source provides a current signal to the common electrode 10. After the current passes through the head and hand to form a circuit, the impedance electrode 3 on the first measuring post 9 and the second measuring post 8 detects the voltage signal and calculates the brain-hand impedance value by combining it with the known current value of the excitation signal from the excitation source. Furthermore, the fingerprint sensor 1 and the forehead fingerprint sensor 2 on the first measuring post 9 and the second measuring post 8 respectively collect texture information from the hand and forehead during pressing, thereby achieving synchronous acquisition of multimodal physiological information between the brain and hand.

[0031] In the above scheme, a first measuring column 9 and a second measuring column 8 are designed. Signal measuring electrodes can be set on both the top and bottom of the measuring columns. Combined with fingerprint and forehead fingerprint information, the types of data collected are enriched. The common electrode 10 further enables impedance measurement between the brain and hand, allowing the introduction of an excitation signal to form a brain-hand impedance measurement circuit, thus realizing brain-hand impedance measurement. The measuring device has a simple structure and significantly improved portability.

[0032] Understandably, the measurement of brain-hand impedance is based on the principle of impedance measurement in electrophysiology. By forming a current loop in the head and hand, the voltage and current through the loop are measured to calculate the impedance value.

[0033] In this embodiment, after setting two measuring columns, an impedance electrode 3 can be set at the upper end of one measuring column for contact with the hand, and an impedance electrode 3 can be set at the lower end of the other measuring column for contact with the human head. Since the measuring column itself is insulated, one impedance electrode 3 contacts the head and is electrically connected to the common electrode 10, and the other impedance electrode 3 contacts the hand. The two impedance electrodes 3 form a measurement path through the human head, hand and the human body part between the head and the hand. When an excitation signal is applied to the third position of the human head, brain-hand impedance measurement from the human head to the hand can be realized.

[0034] Specifically, the common electrode 10 is set at the third position, which is a position that is spaced at a corresponding distance from the first and second positions.

[0035] Figure 2(b) is a simplified diagram of the measurement circuit formation. The human head is the area where the two measuring columns are in contact, represented by a rectangle. The connecting frame between the rectangle and the hand is the arm.

[0036] One feasible implementation method is shown in Figure 2(a), which provides a specific setting: an impedance electrode 3 is set at the upper end of the first measuring column 9, and another impedance electrode 3 is set at the lower end of the second measuring column 8; the two impedance electrodes 3 are respectively connected to the signal acquisition circuit to measure the voltage between the two impedance electrodes 3.

[0037] In the above scheme, after both the first measuring column 9 and the second measuring column 8 are pressed, under the state of the excitation source emitting an excitation signal, the common electrode 10 and the impedance electrode 3 form a closed loop circuit between the hand and the brain, realizing the acquisition of brain-hand impedance signals. The closed loop circuit between the hand and the brain formed by the impedance electrode 3 is shown by the red dotted line in Figure 2(b). The excitation signal passes through the human head, neck, arm 13, fingers, impedance electrode 3 and signal acquisition circuit in sequence to form a closed loop circuit.

[0038] The principle behind the formation of the closed-loop circuit between the hand and brain formed by impedance electrode 3 is as follows:

[0039] Treating the human body as a conductor, the area between the two impedance electrodes 3 located on the head is the human body area for measuring impedance, as shown by the red dotted line in Figure 2(b). The common electrode 10, through which the excitation signal is passed, is equivalent to the power supply terminal. The impedance electrode 3 located at the lower end of the second measuring column 8 is directly connected to the common electrode 10, serving as one end L1 for impedance signal acquisition. The excitation signal passes sequentially through the human head, neck, arm 13, fingers, and the impedance electrode 3 located at the upper end of the first measuring column 9, serving as the other end L2 for impedance signal acquisition. The voltage between L1 and L2 can be acquired by the impedance signal acquisition circuit.

[0040] Another possible implementation is that an impedance electrode 3 is provided at the lower end of the first measuring column 9 and another impedance electrode 3 is provided at the upper end of the second measuring column 8.

[0041] By setting up impedance electrodes 3, one impedance electrode 3 is in direct contact with the hand and the other impedance electrode 3 is in direct contact with the head, the measurement of brain-hand impedance signals can be realized. Both of the above methods can form a brain-hand measurement circuit.

[0042] Specifically, in this embodiment, the first measuring column 9 and the second measuring column 8 serve to fix the measuring sensor in place, pressing and fixing the measuring sensor onto the skin surface 5 at the measurement location on the human body. The positions of the measuring columns can be as follows: Figure 1 As shown, the first measuring column 9 is set at the first position on the human head, which can be the temple position 6; the second measuring column 8 is set at the second position on the human head, which can be the forehead position 7.

[0043] Yes, it is possible. The forehead fingerprint sensor 2 is used to measure forehead fingerprints. It is only necessary to make the measuring surface contact the head position. It can be set on the lower end surface of the first measuring post 9 or the second measuring post 8.

[0044] Yes, it is possible. The fingerprint sensor 2 is used to measure fingerprints and can be set on the pressing surface of the finger. It can be set on the upper surface of the first measuring post 9 or the second measuring post 8.

[0045] In one specific implementation, multiple measuring sensors can be set on the first measuring post 9 at the same time to share a power supply; as shown in Figure 2(a), a fingerprint sensor 1 is set at the upper end of the first measuring post 9 and a forehead fingerprint sensor 2 is set at the lower end. Pressing the first measuring post 9 can simultaneously measure fingerprint data and forehead fingerprint data.

[0046] Optionally, the fingerprint sensor can be an optical fingerprint sensor or a semiconductor fingerprint sensor, and the model can be a capacitive fingerprint recognition sensor SEN0542;

[0047] Optional, a forehead fingerprint sensor is located at the temple, specifically a capacitive fingerprint sensor SEN0542;

[0048] One possible implementation is that one impedance electrode 3 is disposed on the upper end face of the first measuring post 9, and another impedance electrode 3 is disposed on the lower end face of the second measuring post 8; the impedance electrode 3 is disposed on the edge of the fingerprint sensor 1 on the first measuring post 9.

[0049] In the above embodiment, the sensor of the fingerprint sensor 1 is disposed on the upper surface of the first measuring post 9; the impedance electrode 3 is a patch electrode disposed on the edge of the fingerprint sensor 1; the size of the impedance electrode 3 is only at the millimeter level in diameter to achieve circuit connection, such as setting the electrode contact surface of the impedance electrode 3 to have a diameter of 1 mm. Figure 4 As shown, the fingerprint sensor 1 has a 1mm origin point covering its upper surface, which is located at the edge and will not affect the accuracy of fingerprint measurement.

[0050] Another feasible technical solution is that one impedance electrode 3 is set on the upper end face of the second measuring post 8 and the other impedance electrode 3 is set on the lower end face of the second measuring post 8. Since the second measuring post 8 is insulated, the two impedance electrodes 3 are not directly connected, but form an impedance measurement circuit through the arm 13 on the other side (the right side of the figure in Figure 2(b)). In this setting method, the fingerprint sensor 1 is set on the upper surface of the first measuring post 9, and the fingerprint sensor 1 and the impedance electrode 3 can be set separately.

[0051] Optionally, the impedance electrode 3 is specifically an Ag / AgCl sintered electrode, and the impedance electrode 3 is connected to a wire, which is connected to the fourth filter 11 of the signal acquisition device.

[0052] In this embodiment, an impedance electrode 3 is provided, with its two ends positioned via two measuring posts. Based on electrode plates placed at different locations on the human head, an excitation source is introduced to construct a closed-loop circuit between the hand and brain, enabling the measurement of brain-hand impedance. Simultaneously, a fingerprint sensor 1 and a forehead fingerprint sensor 2 are provided on the first measuring post 9 and the second measuring post 8. When the first measuring post 9 and the second measuring post 8 are pressed simultaneously, fingerprint, forehead fingerprint, and brain-hand impedance signals can be measured simultaneously.

[0053] In a further technical solution, in order to realize the measurement of EEG, an EEG electrode 4 is also provided. One EEG electrode 4 is provided at the lower end of the first measuring column 9, or / and another EEG electrode 4 is provided at the lower end of the second measuring column 8.

[0054] When the second measuring column 8 and the first measuring column 9 are pressed, the two EEG electrodes 4 simultaneously contact different positions on the forehead. One EEG electrode 4 and the common electrode 10 form a measurement circuit for one EEG, thereby realizing the measurement of two EEG signals.

[0055] Specifically, when the first measuring column 8 and the second measuring column 9 are pressed, after the impedance information is collected, and the common electrode 10 stops emitting the excitation signal, the common electrode 10 and the EEG electrode 4 form a circuit. The potential difference between the common electrode 10 and the EEG electrode 4 is the EEG signal, and the EEG signal is collected. When the common electrode 10 emits the excitation signal, the hand-brain impedance signal is measured. When the common electrode 10 stops emitting the excitation signal, the EEG signal can be measured, thus realizing the time-division multiplexing of the common electrode 10.

[0056] In use, two fingers are pressed simultaneously on the second measuring post 8 and the first measuring post 9 to fix the device at the temple position 6 and the forehead position 7, ensuring close contact with the skin. At the same time, the fingerprint sensor 1 collects fingerprint information, and the forehead pattern sensor 2 collects forehead patterns. An excitation signal is emitted, causing the impedance electrode 3 and the common electrode 10 to form a brain-hand closed loop circuit, collecting brain-hand impedance signals. After pressing for a set time, the excitation signal is stopped, causing the EEG electrode 4 and the common electrode 10 to form a circuit, collecting EEG signals.

[0057] In this embodiment, pressing the first measuring post 9 and the second measuring post 8 simultaneously acquires fingerprint and forehead crease data, providing information for identifying the person being measured. Simultaneous acquisition of these two types of identity information improves the accuracy of identification. Furthermore, after pressing the first measuring post 9 and the second measuring post 8 once, the electrode pads can measure impedance signals and electroencephalogram (EEG) signals, allowing a single device to measure multiple signals.

[0058] Understandable, such as Figure 3As shown, the acquisition device also includes a signal acquisition circuit and a main controller MCU connected in sequence; the signal acquisition circuit includes a filter and an amplifier connected in sequence.

[0059] For different sensor signals, the acquisition circuit is set up with multiple channels, including fingerprint signal acquisition circuit, forehead vein signal acquisition circuit, impedance acquisition circuit, and EEG acquisition circuit.

[0060] Optionally, the fingerprint signal acquisition circuit includes a first filter and a first amplifier connected in sequence, the first amplifier being connected to the main controller MCU, and the fingerprint sensor 1 being connected to the first filter;

[0061] Optionally, the forehead swivel signal acquisition circuit includes a second filter and a second amplifier connected in sequence, the second amplifier being connected to the main controller MCU, and the forehead swivel sensor 2 being connected to the second filter;

[0062] Optionally, the EEG acquisition circuit includes a third filter 12 and a third amplifier connected in sequence, the third amplifier being connected to the main controller MCU, and the EEG electrodes 4 being connected to the third filter 12.

[0063] Optionally, the impedance acquisition circuit includes a fourth filter and a fourth amplifier connected in sequence, the fourth amplifier being connected to the main controller MCU, and the impedance electrode 3 being connected to the fourth filter;

[0064] Furthermore, in order to upload data, the acquisition device also includes a host computer, which is connected to the main controller MCU. The communication connection can be wired or wireless.

[0065] Among them, wireless communication methods can include WiFi wireless communication, Bluetooth wireless communication, etc.

[0066] It is configurable and also has a power supply, which provides power to the various sensors, electrode plates, signal acquisition circuits and main controller.

[0067] One possible implementation is that the excitation source is connected to the main controller MCU, and the main controller MCU controls the excitation source to provide an excitation current signal;

[0068] Figure 3 The first filter, second filter, third filter 12 and fourth filter 11 in the filter circuit can use the same filter circuit, as shown in Figures 5(a) and 5(b), which includes an input filter circuit, a diode and an output filter circuit.

[0069] The input filter circuit uses an RC filter network, and the output filter circuit also uses an RC filter network.

[0070] Diodes U1 and U3 are model number TPD4E1B06DRLR. These diodes are used to protect circuits from electrostatic discharge (ESD) damage. When a high-voltage ESD event occurs at the circuit input, the diodes conduct, diverting the electrostatic current to ground (GNDA), thus preventing damage to chips or sensitive components due to high voltage.

[0071] In this embodiment, two diodes, U1 and U3, can be used to form a filter circuit for four sensors, as follows:

[0072] 1) 1P and IN1P are one input, and the corresponding output is IN4P. IN4P is connected to the input terminal IN4P of ADS1299. The input filter circuit includes resistor R1 and capacitor C1, and the output filter circuit includes resistor R5 and capacitor C5.

[0073] 2) IN2P and IN2P are one input, and the corresponding output is IN3P. IN3P is connected to the input terminal IN3P of ADS1299. The input filter circuit includes resistor R2 and capacitor C2, and the output filter circuit includes resistor R6 and capacitor C6.

[0074] 3) 5P and IN5P are one input, and the corresponding output is IN8P. IN8P is connected to the input terminal IN8P of ADS1299. The input filter circuit includes resistor R3 and capacitor C3, and the output filter circuit includes resistor R8 and capacitor C8.

[0075] 4) 6P and IN6P are one input, and the corresponding output is IN7P. IN7P is connected to the input terminal IN7P of ADS1299. The input filter circuit includes resistor R4 and capacitor C4, and the output filter circuit includes resistor R9 and capacitor C9.

[0076] Figure 3 The first, second, third, and fourth amplifiers in the circuit, along with the four-channel amplification and conversion, can be implemented using a single analog-to-digital converter (ADS1299), which integrates a programmable gain amplifier. Figure 6 The figure shows the pin diagram of the ADS1299 analog-to-digital converter and its peripheral circuitry.

[0077] The following describes the peripheral circuitry of the ADS1299 analog-to-digital converter, including:

[0078] 1) Power supply circuit, pins include AVDD, DVDD, GNDA, DGND; AVDD and DVDD are analog and digital power inputs respectively, and GNDA and DGND are ground;

[0079] The power supply pins are connected to ground through parallel filter capacitors for power supply decoupling, reducing the impact of power supply ripple on the chip; for example, the power supply of the AVDD pin is grounded through parallel capacitors C12 and C13; the power supply of the DVDD pin is grounded through parallel capacitors C25 and C26; the other power supply pins are the same and will not be described in detail.

[0080] DVDD supplies power to the digital circuitry, while AVDD supplies power to the analog circuitry. This design separates the analog and digital power supplies to avoid mutual interference.

[0081] 2) Reference voltage section: The connection pins are VREFP and VREFN;

[0082] Used to provide a high-precision reference voltage for analog-to-digital conversion, ensuring the accuracy of ADC conversion.

[0083] The VREFP and VREFN pins are filtered by external filter capacitors C10 and C11. The external reference voltage AVSS can be a high-precision reference source or a regulator.

[0084] 3) The bias circuit, through the combination of external filter capacitors and internal circuitry, generates a stable bias voltage to provide a reference for the internal analog circuitry of the chip. The three pins BIASOUT, BIASIN, and BIASINV form the chip's internal bias network. BIASINV is connected to BIASOUT through a parallel resistor R16 and capacitor C27, and BIASIN is connected to BIASOUT through a resistor R15.

[0085] 4) The DRDY pin is usually directly connected to the GPIO pin of the main control chip MCU and is used as an interrupt signal or a trigger signal for data reading;

[0086] 5) CS (Chip Select) The CS pin is connected to the main control chip MCU through a pull-up resistor R19 and R18 to control the enable state of U4;

[0087] 6) The input pins include IN1P, IN2P, IN3P, IN4P, IN5P, IN6P, IN7P, and IN8P; connect to the filter circuits in Figure 5(a) and Figure 5(b);

[0088] The main controller MCU U7 can be an ESP32 microcontroller with built-in Bluetooth and WiFi wireless connectivity modules; for example... Figure 7 The diagram shows the pinout of the ESP32 microcontroller and its peripheral circuitry, including 34 GPIO ports for data input and output.

[0089] The connection interface between the main controller MCU and the ADS1299 is labeled on the corresponding pins. For example, pin IO21 of ESP32 is labeled 1299-MISO, where 1299 indicates... Figure 6 The ADS1299 chip is connected to pin 43, corresponding to the DOUT pin. The connections for the other key interfaces are shown in Table 1. In Table 1, pins in the same row are connected together.

[0090] Table 1. Pin Connections Between ADS1299 and MCU

[0091]

[0092] When using it, press two fingers on the second measuring post 8 and the first measuring post 9 to fix the measuring posts at the temple position 6 and the forehead position 7, respectively.

[0093] When the first measuring column 9 is pressed, the fingerprint sensor 1 in Figure 2(a) collects fingerprint information. The collected fingerprint information is then processed... Figure 3 After being filtered by the first filter, the signal is sent to the first amplifier, and after being amplified by the first amplifier, it is sent to the MCU.

[0094] In Figure 2(a), the forehead fingerprint sensor 2 collects forehead fingerprint information. The collected information is then processed... Figure 3 After being filtered by the second filter, the signal is sent to the second amplifier, amplified by the second amplifier, and then sent to the MCU.

[0095] When the second measuring column 8 and the first measuring column 9 are pressed, impedance information can be acquired. The MCU controls the power module to emit an excitation source through the common electrode 10, so that the impedance electrode 3 forms a closed loop between the hand and the brain. At this time, the brain-hand impedance signal is acquired, and the acquired information is processed... Figure 3 After being filtered by the fourth filter, the signal is sent to the fourth amplifier, and after being amplified by the fourth amplifier, it is sent to the MCU.

[0096] When the second measuring column 8 and the first measuring column 9 are pressed, if impedance information is acquired, the common electrode 10 stops emitting the excitation source. At this time, the common electrode 10 and the EEG electrode 4 form a circuit, and the potential difference between the common electrode 10 and the EEG electrode 4 is the EEG signal. The EEG signal is acquired and processed... Figure 3 After being filtered by the third filter 12, the signal is sent to the third amplifier, and after being amplified by the third amplifier, it is sent to the MCU.

[0097] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0098] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A brain-hand physiological information acquisition device, characterized in that: It includes a first measuring post and a second measuring post, and impedance electrodes, a fingerprint sensor, and a forehead fingerprint sensor are provided on the first measuring post and the second measuring post; The first and second measuring columns are respectively set at the first and second positions on the human head; It also includes an excitation source and a common electrode connected to the excitation source. The common electrode is set at a third position on the human head. The common electrode and the impedance electrode set on the first and second measuring columns form a hand and brain impedance measurement circuit through the human head and hand.

2. The brain-hand physiological information acquisition device as described in claim 1, characterized in that, An impedance electrode is set at the upper end of the first measuring column, and another impedance electrode is set at the lower end of the second measuring column. The common electrode is supplied with an excitation signal, which is equivalent to a power source. The excitation signal passes through the head, neck, arm, fingers, and two impedance electrodes in sequence to form a hand and brain impedance measurement circuit.

3. The brain-hand physiological information acquisition device as described in claim 1, characterized in that: An impedance electrode is installed at the lower end of the first measuring column, and another impedance electrode is installed at the upper end of the second measuring column.

4. The brain-hand physiological information acquisition device as described in claim 1, characterized in that: The first measuring post is placed at the temple of the person's head; the second measuring post is placed at the forehead of the person's head.

5. The brain-hand physiological information acquisition device as described in claim 1, characterized in that: The fingerprint sensor is located on the upper surface of the first or second measuring post.

6. The brain-hand physiological information acquisition device as described in claim 5, characterized in that: The fingerprint sensor can be either an optical fingerprint sensor or a semiconductor fingerprint sensor.

7. The brain-hand physiological information acquisition device as described in claim 1, characterized in that: A forehead fingerprint sensor is installed at the lower end of either the first or the second measuring column.

8. The brain-hand physiological information acquisition device as described in claim 1, characterized in that: The acquisition device is also equipped with EEG electrodes. One EEG electrode is installed at the lower end of the first measuring column, and another EEG electrode is installed at the lower end of the second measuring column. When the common electrode does not emit an excitation signal, the common electrode and the EEG electrode form a circuit, and the potential difference between the common electrode and the EEG electrode is the EEG signal.

9. The brain-hand physiological information acquisition device as described in claim 1, characterized in that: The acquisition device is also equipped with a signal acquisition circuit and a main controller MCU connected in sequence; the signal acquisition circuit includes a filter and an amplifier connected in sequence.

10. The brain-hand physiological information acquisition device as described in claim 9, characterized in that: The filter circuit includes an input filter circuit, diodes, and an output filter circuit; the input filter circuit and the output filter circuit each use RC filter networks.

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