Signal acquisition device and signal acquisition method

Abstract

The invention relates to the field of brain signal acquisition, and discloses a signal acquisition device and a signal acquisition method.The signal acquisition device comprises a fixing support and a signal acquisition assembly, the fixing support comprises a first abutting part, a second abutting part and a first connecting part, and the two ends of the first connecting part are connected with the first abutting part and the second abutting part respectively. Particularly, the first connecting part is configured to move relative to the first abutting part and / or the second abutting part so as to change the relative position of the first abutting part and the second abutting part. When the size of the head part is large, the distance between the first abutting part and the second abutting part can be farther. When the size of the head part is small, the distance between the first abutting part and the second abutting part can be closer. According to the signal acquisition device in the scheme, on one hand, one signal acquisition device can be adapted to heads of various sizes, and an operator does not need to take a plurality of signal acquisition devices of different sizes to match the heads of different sizes, so that the signal acquisition device is more convenient to operate;

Description

Technical Field

[0001] This invention relates to the field of brain signal acquisition, and in particular to a signal acquisition device and a signal acquisition method. Background Technology

[0002] Signal acquisition devices are used to collect brain signals, specifically electroencephalogram (EEG) signals, brain infrared signals, brain magnetic resonance imaging (MEI) signals, brain oxygenation signals, or brain ultrasound signals. To facilitate brain signal acquisition, the device is equipped with a fixed support that fits over the head, thus fixing the relative position of the device and the head, allowing the acquisition unit to collect brain signals from the target location. Because different users have different head sizes, related technologies use multiple signal acquisition devices of different sizes to accommodate various head shapes. However, this process requires time to adapt the device to the head size, making signal acquisition somewhat cumbersome. Summary of the Invention

[0003] The main objective of this invention is to provide a signal acquisition device and method that can improve the convenience of brain signal acquisition.

[0004] To achieve the above objectives, an embodiment of the first aspect of the present invention provides a signal acquisition device, comprising:

[0005] A fixing bracket is suitable for fixing to the head. The fixing bracket includes a first abutment part, a second abutment part, and a first connecting part. Both the first abutment part and the second abutment part are suitable for abutting against the head. One end of the first connecting part is connected to the first abutment part, and the other end is connected to the second abutment part.

[0006] The signal acquisition assembly includes an acquisition unit for acquiring brain signals, the acquisition unit being connected to a fixed support;

[0007] In this configuration, at least one of the first abutting part and the second abutting part is movably connected to the first connecting part, so that the first connecting part can move relative to at least one of the first abutting part and the second abutting part to change the relative position of the first abutting part and the second abutting part.

[0008] In some embodiments, the signal acquisition device further includes a first driving component, which is connected to the first supporting portion and the first connecting portion respectively, and is used to drive the first connecting portion to move relative to the first supporting portion.

[0009] In some embodiments, the first drive assembly includes a first drive motor and a first winding portion, the first connecting portion includes a first end portion away from the second abutting portion, the first end portion is connected to the first winding portion, and the first drive motor is connected to the first winding portion for driving the first winding portion to wind the first end portion.

[0010] In some embodiments, the signal acquisition device further includes a pressure sensor and a controller. The pressure sensor is connected to a fixed bracket and is adapted to acquire the pressure value between the fixed bracket and the head. The pressure sensor and the first drive component are both connected to the controller. The controller is configured to control the first drive component to work according to the pressure value acquired by the pressure sensor, so that the pressure value is adjusted to a preset pressure range.

[0011] In some embodiments, the pressure sensor is connected to the first abutment portion; and / or, the pressure sensor is connected to the second abutment portion; and / or, the pressure sensor is connected to the first connection portion.

[0012] In some embodiments, the first abutment defines an inner cavity, the first drive assembly is disposed in the inner cavity, and the first connection includes a first end portion facing away from the second abutment, the first end portion passing through the inner cavity and connected to the first drive assembly.

[0013] In some embodiments, the first drive assembly includes a first drive motor and a first winding portion, with a first end connected to the first winding portion and the first drive motor connected to the first winding portion for driving the first winding portion to wind the first end.

[0014] The first connecting portion is strip-shaped, and the first connecting portion includes a first intermediate strip located between the first abutting portion and the second abutting portion;

[0015] The width direction of the first intermediate strip is parallel to the rotation axis direction of the first winding part; or the width direction of the first intermediate strip intersects the rotation axis direction of the first winding part.

[0016] In some embodiments, the signal acquisition device further includes a second connecting part and a third supporting part, wherein one end of the second connecting part is connected to the first supporting part and the other end is connected to the third supporting part;

[0017] The signal acquisition device also includes a second driving component, which is connected to the first supporting part and is used to drive the second connecting part to move relative to the first supporting part.

[0018] In some embodiments, the first abutment portion defines an inner cavity, and both the first driving component and the second driving component are disposed in the inner cavity;

[0019] The first drive assembly is located on the side of the inner cavity that is close to or away from the second abutment; and / or, the second drive assembly is located on the side of the inner cavity that is close to or away from the third abutment.

[0020] In some embodiments, the collecting part is connected to the first supporting part and / or the second supporting part.

[0021] In some embodiments, the signal acquisition device includes a third driving component, which is connected to the first supporting portion and the acquisition portion respectively, and the third driving component is configured to drive the acquisition portion to move relative to the first supporting portion.

[0022] In some embodiments, the signal acquisition device further includes a controller, which is connected to the third driving component and the acquisition unit, and controls the third driving component to work based on the brain signals acquired by the acquisition unit.

[0023] In some embodiments, the first abutting portion is adapted to abut against one side of the head and has a clearance hole, the third driving component is at least partially located in the clearance hole, the collecting portion is connected to the end of the third driving component adapted to face the head, and the third driving component is configured to drive the collecting portion to extend or retract through the clearance hole.

[0024] In some embodiments, the clearance hole extends through the first abutment portion, and the third drive component extends out of the clearance hole from the side opposite to the acquisition portion.

[0025] In some embodiments, the acquisition unit includes at least one of an electroencephalogram (EEG) sensor for acquiring EEG signals, an infrared brain sensor for acquiring infrared brain signals, a magnetic brain sensor for acquiring magnetic brain signals, an oxygen brain sensor for acquiring oxygen brain signals, or an ultrasound brain sensor for acquiring ultrasound brain signals.

[0026] In some embodiments, the fixing bracket includes a horizontal band and a vertical band. The horizontal band is adapted to be arranged around the head around the vertical axis, and the vertical band is adapted to be arranged around the upper end of the head around the horizontal axis. The two ends of the vertical band are respectively connected to the horizontal band.

[0027] The transverse band includes a first abutting portion, a second abutting portion, and a first connecting portion; and / or, the vertical band includes a first abutting portion, a second abutting portion, and a first connecting portion.

[0028] In some embodiments, the fixation bracket further includes a chin connecting band, which includes a first band body and a second band body. The first band body and the second band body are respectively connected to opposite sides of the transverse band along the transverse direction. The end of the first band body facing away from the transverse band and the end of the second band body facing away from the transverse band are detachably connected.

[0029] A second aspect of the present invention also provides a signal acquisition method for use with any of the signal acquisition devices described above, the signal acquisition method comprising the following steps:

[0030] Acquire the pressure value between the signal acquisition device and the head;

[0031] When the pressure value is outside the preset pressure range, the relative position between the first supporting part and the second supporting part is changed to change the pressure value and bring the pressure value within the preset pressure range.

[0032] The acquisition unit is controlled to acquire brain signals.

[0033] In some embodiments, the step of controlling the acquisition unit to acquire brain signals includes:

[0034] Obtain the measured impedance value between the acquisition unit and the head;

[0035] When the measured impedance value is greater than the preset impedance value, the acquisition unit is driven to move towards the head to reduce the measured impedance value to less than or equal to the preset impedance value.

[0036] Brain signals from the head were collected.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] In the technical solution of this invention, the signal acquisition device includes a fixed bracket and a signal acquisition assembly. The fixed bracket includes a first abutment, a second abutment, and a first connecting portion. The two ends of the first connecting portion are respectively connected to the first abutment and the second abutment. Specifically, the first connecting portion is configured to move relative to the first abutment and / or the second abutment to change the relative position of the first abutment and the second abutment. In other words, the relative position of the first abutment and the second abutment can be adjusted by adjusting the relative position of the first connecting portion and the first abutment and / or the second abutment, thereby adapting to heads of different sizes. Specifically, when the head size is large, the distance between the first abutment and the second abutment can be greater; when the head size is small, the distance between the first abutment and the second abutment can be closer. The signal acquisition device in this solution has several advantages. First, one device can be adapted to various head sizes, eliminating the need for operators to use multiple different models to match head shapes, making operation more convenient. Second, the positions of the first and second abutments can be adjusted according to the user's head shape, resulting in a better fit between the fixing device and the user's head shape, thus improving the fixing effect for different head shapes and making the data acquisition of the signal acquisition component more accurate. Third, this solution can adjust the pressure between the signal acquisition device and the head by adjusting the relative positions of the first and second abutments, making the user feel more comfortable. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0040] Figure 1 This is a three-dimensional schematic diagram of a signal acquisition device according to an embodiment of the present invention;

[0041] Figure 2 This is a side view of a combination of a first driving component, a first connecting part, a first supporting part, a pressure sensor, and a third driving component in one embodiment of the present invention.

[0042] Figure 3 This is a side view of the assembly of a pressure sensor, a first supporting part, and a collecting part in one embodiment of the present invention;

[0043] Figure 4 This is a side view of a combination of a first driving component, a first connecting part, a first supporting part, a second driving component, a second connecting part, a pressure sensor, and a data acquisition part in one embodiment of the present invention.

[0044] Figure 5 This is a side view of a combination of a first driving component, a first connecting part, a first supporting part, a second driving component, a second connecting part, a pressure sensor, a data acquisition part, and a third driving component in one embodiment of the present invention.

[0045] Figure 6 This is a cross-sectional schematic diagram of the combination of the first supporting part, the pressure sensor, the third driving component and the acquisition part in one embodiment of the present invention;

[0046] Figure 7 This is a frontal view of a signal acquisition device worn on the head in one embodiment of the present invention;

[0047] Figure 8 This is a side view of a combination of a first driving component, a first connecting part, a first supporting part, a second driving component, a second connecting part, a pressure sensor, and a data acquisition part in another embodiment of the present invention.

[0048] Figure 9 This is a flowchart of a signal acquisition method in one embodiment of the present invention;

[0049] Figure 10 This is a flowchart of a signal acquisition method in another embodiment of the present invention.

[0050] Explanation of icon numbers:

[0051] 10 - Signal acquisition device;

[0052] 100-Fixed bracket; 110-Supporting part; 110a-First support part; 110b-Second support part; 110c-Third support part; 111-Inner cavity; 112-Allowing hole; 120-Connecting part; 120a-First connecting part; 121a-First end; 122a-First intermediate band; 120b-Second connecting part; 121b-Second end; 122b-Second intermediate band; 130-Transverse band; 140-Vertical band; 150-Jaw connecting band; 151-First band body; 152-Second band body; 153-First connecting structure; 154-Second connecting structure;

[0053] 200 - Signal acquisition component; 210 - Acquisition unit; 220 - Controller;

[0054] 300 - First drive assembly; 310 - First drive motor; 320 - First winding section;

[0055] 400 - Second drive assembly; 410 - Second drive motor; 420 - Second winding section;

[0056] 500 - Third drive assembly; 510 - Third drive motor; 520 - Protective housing;

[0057] 600 - Pressure sensor;

[0058] 20 - Head.

[0059] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0061] The signal acquisition device is used to collect brain signals, specifically electroencephalogram (EEG) signals, brain infrared signals, brain magnetic resonance imaging (MEI) signals, brain oxygenation signals, or brain ultrasound signals. To facilitate brain signal acquisition, the device is equipped with a mounting bracket. In related technologies, the bracket can be a semi-enclosed, cap-shaped shell for easy wearing on the head. The bracket is fitted onto the head to fix the relative position of the signal acquisition device to the head, enabling the acquisition unit of the device to collect brain signals from the corresponding target location on the head.

[0062] Because different users have different head sizes, and the fixed support frame has a fixed external dimension, the signal acquisition device can only adapt to a limited range of different head sizes. When it is necessary to collect brain data from multiple users in batches, multiple signal acquisition devices of different sizes need to be set up to adapt to different head sizes. The signal acquisition process is quite complicated as it takes time to adapt the signal acquisition device to the head size.

[0063] In view of this, see Figure 1 - Figure 8 This embodiment provides a signal acquisition device 10, which includes a fixing bracket 100 and a signal acquisition component 200. The signal acquisition component 200 is used to acquire brain signals. Specifically, the signal acquisition component 200 includes an acquisition unit 210, which may include at least one of the following: an electroencephalogram (EEG) sensor for acquiring EEG signals, a brain infrared sensor for acquiring brain infrared signals, a brain magnetic resonance (MER) sensor for acquiring brain magnetic resonance (MMR) signals, a brain oxygen sensor for acquiring brain oxygen signals, or a brain ultrasound sensor for acquiring brain ultrasound signals. This allows the signal acquisition device 10 to acquire at least one of the following signals: EEG signals, brain infrared signals, brain magnetic resonance (MMR) signals, brain oxygen signals, or brain ultrasound signals.

[0064] See Figure 1 The fixing bracket 100 is used to fix the signal acquisition device 10 to the head 20 to prevent excessive relative displacement of the signal acquisition device 10 relative to the head 20 during signal acquisition, which would affect the signal acquisition accuracy. The specific shape of the fixing bracket 100 depends on the actual needs, as long as it can maintain a good fixation to the head 20. Specifically, the fixing bracket 100 can be a hollow frame structure, a semi-enclosed shell structure, or a combination structure of a semi-enclosed shell structure and a hollow frame structure. See [link to relevant documentation] Figure 1 In this embodiment, the fixing bracket 100 has a hollow frame structure that does not completely cover the top of the head 20. On the one hand, this design allows the operator to easily observe the relative position of the signal acquisition component 200 and the head 20 through the hollow part, thereby improving the accuracy of signal acquisition. On the other hand, this design can reduce the overall weight of the signal acquisition device 10 and improve wearing comfort. To improve the sealing of the fixing bracket 100, in some embodiments, a semi-enclosed shell, specifically a transparent shell, can be provided on the outside of the hollow frame; or, a transparent film can be provided in the hollow part of the hollow frame, so as to improve the sealing effect of the fixing bracket 100 without affecting the operator's field of vision to observe the inside of the fixing bracket 100.

[0065] See Figure 1The fixing bracket 100 includes multiple abutment portions 110 and multiple connecting portions 120. Each connecting portion 120 is connected to each abutment portion in a corresponding manner. Each abutment portion 110 is adapted to abut against a corresponding position on the head 20, so as to fix the fixing bracket 100 to the head 20. See also Figure 1 In some embodiments, the fixing bracket 100 may include five abutment portions 110 and eight connecting portions 120, the eight connecting portions 120 connecting the five abutment portions 110 together. Four of the abutment portions 110 are used to abut the lateral outer periphery of the head 20 (the front, rear, left, and right sides of the head 20), and the other abutment portion 110 is used to abut the top of the head 20. In other embodiments, the fixing bracket 100 may also include other numbers of abutment portions 110 and connecting portions 120, or include other connection structures besides the abutment portions 110 and connecting portions 120. For ease of description, the following example uses two abutment portions 110 and one connecting portion 120. For easy distinction, the two abutment portions 110 are named first abutment portion 110a and second abutment portion 110b, respectively, and the one connecting portion 120 is named first connecting portion 120a. It should be noted that in some embodiments, the first abutment portion 110a and the second abutment portion 110b are distinguished only by their names, and they are structurally equivalent. For example, if a component is mentioned as being connected to the first abutment portion 110a in one of the embodiments below, it means that in at least one other embodiment, the component may also be connected to the second abutment portion 110b.

[0066] Both the first abutting portion 110a and the second abutting portion 110b are adapted to abut against the head 20, for example, see [link to example]. Figure 1 Taking the first abutment 110a as an example, which abuts against the front of the head 20, and the second abutment 110b as an example, which abuts against the left side of the head 20, the first connecting part 120a is connected at one end to the first abutment 110a and at the other end to the second abutment 110b. The first connecting part 120a is used to connect the first abutment 110a and the second abutment 110b into one unit. When the signal acquisition device 10 is fixed to the head 20, the first connecting part 120a can be arranged at a distance from the head 20, or it can at least partially abut against the head 20. In this embodiment, when the signal acquisition device 10 is fixed to the head 20, the first connecting part 120a is arranged at a distance from the head 20.

[0067] See Figure 1 , Figure 6 - Figure 7The signal acquisition component 200 includes an acquisition unit 210 for acquiring brain signals and a controller 220 connected to the acquisition unit 210. The controller 220 can be electrically connected to the acquisition unit 210 via wires or wirelessly connected. In this embodiment, the controller 220 and the acquisition unit 210 are electrically connected via wires, and the controller 220 is fixed to the fixed bracket 100. In other embodiments, the controller 220 can also be externally mounted via wires, that is, the positions of the controller 220 and the fixed bracket 100 are not fixed, and they are connected by wires or wireless communication. During the brain signal acquisition process, relative displacement can occur between the fixed bracket 100 and the controller 220.

[0068] The acquisition unit 210 is connected to the fixation bracket 100 to acquire brain signals at a target location on the head 20 after the fixation bracket 100 is fixed to the head 20. See also Figure 1 , Figure 2 as well as Figure 6 In some embodiments, the signal acquisition component 200 includes multiple acquisition units 210. These multiple acquisition units 210 can be used to acquire the same brain signal or to acquire different brain signals. For example, all of the multiple acquisition units 210 can be used to acquire one of the following signals: electroencephalogram (EEG) signals, brain infrared signals, brain magnetic resonance imaging (MEI) signals, brain oxygenation signals, or brain ultrasound signals; or, some of the acquisition units 210 can be used to acquire EEG signals, while others can be used to acquire brain infrared signals. In this embodiment, the signal acquisition component 200 includes multiple acquisition units 210, and each of the acquisition units 210 is used to acquire EEG signals.

[0069] The specific fixed position of the acquisition unit 210 on the fixed support 100 depends on actual needs, as long as it can effectively acquire brain signals from the corresponding position of the head 20. The placement and relative position of the acquisition unit 210 to the head 20 vary depending on the type of signal acquired. In this embodiment, when the acquisition unit 210 is used to acquire EEG signals, it needs to abut against the connector 20 during the acquisition process. To facilitate this abutment, the acquisition unit 210 can be connected to the support portion 110 of the fixed support 100. Specifically, the acquisition unit 210 is connected to the first support portion 110a and / or the second support portion 110b. Furthermore, the number of acquisition units 210 can be the same as the number of support portions 110, with each support portion 110 corresponding to one acquisition unit 210. In other embodiments, the acquisition unit 210 can also be connected to the connecting portion 120 or other parts of the fixed support 100, which will not be elaborated here.

[0070] In this embodiment, at least one of the first abutting portion 110a and the second abutting portion 110b is movably connected to the first connecting portion 120a, so that the first connecting portion 120a can move relative to at least one of the first abutting portion 110a and the second abutting portion 110b to change the relative position of the first abutting portion 110a and the second abutting portion 110b. Exemplarily, in some embodiments, the first connecting portion 120a is fixedly connected to the first abutting portion 110a and movably connected to the second abutting portion 110b. When the first connecting portion 120a moves relative to the second abutting portion 110b, the relative position between the first abutting portion 110a and the second abutting portion 110b changes. In some embodiments, the first connecting portion 120a is fixedly connected to the second supporting portion 110b and movably connected to the first supporting portion 110a. When the first connecting portion 120a moves relative to the first supporting portion 110a, the relative position between the first supporting portion 110a and the second supporting portion 110b changes. In still other embodiments, the first connecting portion 120a is movably connected to both the first supporting portion 110a and the second supporting portion 110b. When the first connecting portion 120a moves relative to at least one of the first supporting portion 110a and the second supporting portion 110b, the relative position between the first supporting portion 110a and the second supporting portion 110b changes. For ease of description, the following embodiments will use the movably connected first supporting portion 110a and the first connecting portion 120a as an example.

[0071] In the above embodiments, by adjusting the relative positions of the first connecting portion 120a and the first supporting portion 110a and / or the second supporting portion 110b, the relative positions of the first supporting portion 110a and the second supporting portion 110b can be adjusted, thereby adapting to different sizes of head 20. Specifically, when the head 20 is larger, the distance between the first supporting portion 110a and the second supporting portion 110b can be greater; when the head 20 is smaller, the distance between the first supporting portion 110a and the second supporting portion 110b can be closer. The signal acquisition device 10 in this solution has several advantages. First, one device can be adapted to various head sizes 20, eliminating the need for operators to use multiple acquisition devices of different sizes to match the head size 20, making operation more convenient. Second, the positions of the first abutment 110a and the second abutment 110b can be adjusted according to the shape of the user's head 20, resulting in a better match between the fixing device and the user's head 20 shape, thus providing better fixation for different head shapes and making the data acquisition of the signal acquisition component 200 more accurate. Third, this solution can adjust the pressure between the signal acquisition device 10 and the head 20 by adjusting the relative positions of the first abutment 110a and the second abutment 110b, making the user feel more comfortable.

[0072] It should be noted that the signal acquisition device 10 has other supporting parts 110 besides the first supporting part 110a and the second supporting part 110b, and also has other connecting parts 120 besides the first connecting part 120a. The connection relationships between the other connecting parts 120 and the other supporting parts 110 of the signal acquisition device 10 may be the same as or different from those between the first supporting part 110a, the second supporting part 110b, and the first connecting part 120a. Specifically, see [link to documentation]. Figure 1 , Figure 2 as well as Figure 6 In some embodiments, the five supporting parts 110 of the signal acquisition device 10 are connected by a total of eight connecting parts 120. Each connecting part 120 has two ends movably connected to the supporting parts 110 connected to it, thereby enabling relative positional changes among the five supporting parts 110. In other embodiments, only the first supporting part 110a and the second supporting part 110b can move relative to each other (i.e., only two supporting parts 110 in the signal acquisition device 10 can move relative to each other), while the other supporting parts 110 cannot move relative to each other.

[0073] When the first connecting part 120a and the first supporting part 110a are movably connected, they can be manually driven to generate relative movement, or they can be automatically driven by a driving component to generate relative movement. Specifically, see [link to relevant documentation]. Figure 1 , Figure 2 as well as Figure 6 In some embodiments, the signal acquisition device 10 further includes a first driving component 300, which is connected to the first supporting portion 110a and the first connecting portion 120a respectively (in this case, the first connecting portion 120a is indirectly connected to the first supporting portion 110a through the first driving component 300). The first driving component 300 is used to drive the first connecting portion 120a to move relative to the first supporting portion 110a. Compared with the manual driving method, using the first driving component 300 to drive the first connecting portion 120a to move relative to the first supporting portion 110a is more convenient to operate and has higher adaptation efficiency.

[0074] See Figure 1 , Figure 2 as well as Figure 5In some embodiments, the first driving assembly 300 includes a first driving motor 310 and a first winding portion 320. The first driving motor 310 is connected to the first winding portion 320 and drives the first winding portion 320 to rotate about a rotation axis. The first connecting portion 120a includes a first end portion 121a that is away from the second abutting portion 110b. The first end portion 121a of the first connecting portion 120a is connected to the first winding portion 320. When the first driving motor 310 drives the first winding portion 320 to rotate, it drives the first winding portion 320 to wind the first end portion 121a. Specifically, during the rotation of the first winding portion 320 around the rotation axis, driven by the first drive motor 310, the first end 121a of the first connecting portion 120a gradually winds around the outer periphery of the first winding portion 320. This causes the end of the first connecting portion 120a that is away from the second supporting portion 110b to gradually move towards the first supporting portion 110a, thereby reducing the distance between the first supporting portion 110a and the second supporting portion 110b to accommodate smaller head shapes. If, during the adjustment process, it is found that the size of the fixing bracket 100 is adjusted too small and the user's head 20 feels pressure, the first drive motor 310 can drive the first winding portion 320 to rotate in the opposite direction. The rotation of the first winding portion 320 in the opposite direction can gradually release the originally wound first end 121a, thereby gradually increasing the distance between the first supporting portion 110a and the second supporting portion 110b under the pressure of the head 20, thus reducing the pressure on the head 20. In this design, the distance between the first abutment 110a and the second abutment 110b is adjusted by winding the first connecting portion 120a. Compared to other structures (such as those where the first end portion 121a is slidably connected to the first abutment portion), this design avoids the formation of a useless protruding segment from the first abutment portion 110a during the movement of the first connecting portion 120a relative to the first abutment portion 110a. This results in a more compact and regular structure for the fixing bracket 100. In other embodiments, the first drive motor 310 can be removed, allowing the first winding portion 320 to have a handheld end. This allows the user to manually rotate the handheld end of the first winding portion 320 to wind the first end portion 121a. In another embodiment, the first winding portion 320 can be replaced by a first hobbing tooth that, together with the first abutment portion 110a, presses against the first end portion 121a. The first hobbing tooth rotates to drive the first end portion 121a to slide relative to the first abutment portion 110a, thereby adjusting the distance between the first abutment portion 110a and the second abutment portion 110b.

[0075] See Figure 1 , Figure 2 as well as Figure 6In some embodiments, the signal acquisition device 10 further includes a pressure sensor 600 and a controller 220. The pressure sensor 600 is connected to the fixed bracket 100 and is adapted to acquire the pressure value between the fixed bracket 100 and the head 20. Both the pressure sensor 600 and the first drive assembly 300 are connected to the controller 220; specifically, the pressure sensor 600 and the first drive assembly 300 are electrically connected to the controller 220 via conductive wires. The controller 220 is configured to control the operation of the first drive assembly 300 based on the pressure value acquired by the pressure sensor 600, so that the pressure value is adjusted to a preset pressure range. In this scheme, the operation of the first drive motor 310 can be adjusted based on the pressure value sensed by the pressure sensor 600. Specifically, when the operator controls the first drive motor 310 to start and rotate forward, the pressure between the fixed bracket 100 and the head 20 detected by the pressure sensor 600 gradually increases. When the pressure value is less than the preset pressure range, the controller 220 controls the first drive motor 310 to continue rotating forward to increase the winding amount of the first winding part 320, thereby increasing the pressure of the fixed bracket 100 on the head 20. When the pressure value is within the preset pressure range, the controller 220 controls the first drive motor 310 to stop working. When the winding amount of the first winding part 320 and the pressure value sensed by the pressure sensor 600 are greater than the preset pressure range, the controller 220 controls the first drive motor 310 to reverse to reduce the winding amount of the first winding part 320 until the pressure value is reduced to within the preset pressure range. In this embodiment, on the one hand, the pressure value between the fixed bracket 100 and the head 20 is ultimately adjusted to a suitable pressure range, ensuring the user's wearing comfort; on the other hand, the controller 220 uses the pressure value sensed by the pressure sensor 600 to provide feedback and adjust the operation of the first drive motor 310, which is more efficient than manually controlling the operation of the first drive motor 310. In other embodiments, the operation of the first drive motor 310 can also be completely manually controlled by the operator. For example, the operator can manually turn on the first drive motor 310 and observe the fit between the first abutment part 110a and the second abutment part 110b and the head 20 during the operation of the first drive motor 310. When the fit meets the requirements, the first drive motor 310 is manually turned off; when the fit is loose, the first drive motor 310 is manually controlled to rotate forward; when the fit is tight, the first drive motor 310 is manually driven to rotate in reverse until the fit is suitable.

[0076] The signal acquisition device 10 may include a plurality of first driving components 300, for example, see [link to example]. Figure 1 - Figure 6In some embodiments, the signal acquisition device 10 may include five first driving components 300, each abutment 110 is connected to a first driving component 300, each first driving component 300 is used to drive the corresponding connection part 120, and all first driving components 300 are connected to the controller 220, so that at least five connection parts 120 can be controlled by the controller 220 at the same time.

[0077] The specific arrangement of the pressure sensor 600 depends on actual requirements. In some embodiments, the pressure sensor 600 is connected to the first supporting portion 110a; in other embodiments, the pressure sensor 600 is connected to the second supporting portion 110b; and in still other embodiments, the pressure sensor 600 is connected to the first connecting portion 120a. See also Figure 1 , Figure 2 as well as Figure 6 In this embodiment, the pressure sensor 600 is connected to the first abutment portion 110a, specifically to the side of the first abutment portion 110a facing the head 20. In this case, the first abutment portion 110a indirectly abuts against the head 20 through the pressure sensor 600. This structural arrangement of the pressure sensor 600 improves the accuracy of pressure sensing. Furthermore, in this embodiment, each abutment portion 110 has a pressure sensor 600 on the side facing the head 20, thereby ensuring accurate sensing of the pressure between each abutment portion 110 and the head 20. Moreover, the pressure sensor 600 connected to each abutment portion 110 is only used to provide feedback to the drive assembly connected to that abutment portion 110, thus ensuring that the pressure between each abutment portion 110 and the head 20 is within a suitable range. Of course, in other embodiments, one pressure sensor 600 can also be used to provide feedback to all drive assemblies, which will not be elaborated here.

[0078] See Figure 1 - Figure 6 In some embodiments, the first abutment portion 110a is hollow and defines an inner cavity 111. The first drive assembly 300 is disposed within the inner cavity 111 of the first abutment portion 110a. The first connecting portion 120a includes a first end portion 121a facing away from the second abutment portion 110b. The first end portion 121a passes through the inner cavity 111 and is connected to the first drive assembly 300. In this design, the first drive assembly 300 can be protected by the first abutment portion 110a, and external foreign objects are less likely to be wound into the gap between the first winding portion 320 and the first end portion 121a, thereby improving the service life of the first drive assembly 300. In other embodiments, the first drive assembly 300 can also be connected to the outside of the first abutment portion 110a. Specifically, the first drive assembly 300 can be connected to the side of the first abutment portion 110a facing away from the head 20.

[0079] See Figure 1- Figure 6 In some embodiments, when the first driving assembly 300 is used to wind the first connecting portion 120a, the first connecting portion 120a may be strip-shaped. In other words, the dimension of the first connecting portion 120a in one direction (width direction) is at least three times or more the dimension in the other direction (thickness direction). When the first connecting portion 120a is strip-shaped, it is easier for the first winding portion 320 to wind while ensuring the structural strength of the first connecting portion 120a. Further, when the first abutting portion 110a defines the inner cavity 111, and the first driving assembly 300 is located in the inner cavity 111 of the first abutting portion 110a, one end of the first connecting portion 120a can adjust the relative position of the first abutting portion 110a and the second abutting portion 110b by extending into or out of the inner cavity 111 of the first abutting portion 110a. For ease of description, the portion of the first connecting portion 120a located between the first supporting portion 110a and the second supporting portion 110b is defined as the first intermediate band 122a. Since the first connecting portion 120a can extend into or out of the first supporting portion 110a, the structural boundary of the first intermediate band 122a is dynamically changing. Specifically, when the length of the portion of the first connecting portion 120a extending into the first supporting portion 110a increases, the length of the first intermediate band 122a decreases; when the length of the portion of the first connecting portion 120a extending into the first supporting portion 110a decreases, the length of the first intermediate band 122a increases.

[0080] See Figure 8 In some embodiments, when the first connecting portion 120a is strip-shaped, and one end of the first connecting portion 120a extends into the inner cavity of the first supporting portion 110a and is wound by the first winding portion 320, the rotation axis direction of the first winding portion 320 can be parallel to the width direction of the first intermediate strip 122a of the first connecting portion 120a. In this solution, the first winding portion 320 is more convenient for winding the first connecting portion 120a, and the thickness of the first supporting portion 110a can be reduced. See also Figure 4 as well as Figure 5 In other embodiments, the width direction of the first intermediate strip 122a may intersect the rotation axis direction of the first winding portion 320, specifically, they may be perpendicular to each other. Compared to a structure where the rotation axis direction of the first winding portion 320 is parallel to the width direction of the first intermediate strip 122a, in this embodiment, the first winding portion 320 and the first end portion 121a can easily avoid other components within the inner cavity 111, improving the space utilization of the inner cavity 111. For example, Figure 4 as well as Figure 5 When the third drive assembly 500 is provided in the inner cavity 111, the first winding portion 320 and the first end portion 121a can easily avoid the third drive assembly 500.

[0081] It should be noted that when the width direction of the first intermediate strip 122a intersects the rotation axis direction of the first winding portion 320, the first end 121a of the first connecting portion 120a needs to be twisted by a corresponding angle after entering the inner cavity 111 of the first supporting portion 110a before being wound around the first winding portion 320. For example, when the width direction of the first intermediate strip 122a is perpendicular to the rotation axis direction of the first winding portion 320, the first end 121a of the first connecting portion 120a needs to be twisted by 90° after entering the inner cavity 111 of the first supporting portion 110a before being wound around the first winding portion 320. In some embodiments, when the thickness of the first connecting portion 120a is relatively thin, the single-layer first end portion 121a located outside the first supporting portion 110a can be extended into the inner cavity 111 and gradually folded into a double layer before being wound around the first winding portion 320. This solution can further save space in the inner cavity 111, improve the space utilization of the inner cavity 111, and also reduce the thickness dimension of the first supporting portion 110a along the rotation axis direction of the first winding portion 320.

[0082] See Figure 8 In some embodiments, the first winding portion 320 may be located within the inner cavity 111 on the side near the second abutment portion 110b, thereby allowing the first end portion 121a of the first connecting portion 120a extending into the inner cavity 111 to be immediately wound around the first winding portion 320, resulting in a smaller space occupation by the first end portion 121a within the inner cavity 111. See also Figure 1 - Figure 6 In other embodiments, the first drive assembly 300 may be located on the side of the inner cavity 111 opposite to the second abutment portion 110b. This arrangement provides a sufficiently large torsional space for the first end portion 121a, thereby ensuring smooth winding of the first winding portion 320 around the first end portion 121a. For example, when the first drive assembly 300 is located in the inner cavity 111 of the first abutment portion 110a, and the first end portion 121a is wound around the first winding portion 320 after being twisted 90°, since the first winding portion 320 maintains a certain distance from the port on the first abutment portion 110a through which the first end portion 121a passes, the first end portion 121a can have sufficient torsional conversion space, thereby making it less likely for irreversible torsional deformation or wrinkling to occur during the 90° torsional process of the first end portion 121a.

[0083] See Figure 1 - Figure 6In some embodiments, the signal acquisition device 10 further includes a second connecting portion 120b and a third supporting portion 110c. One end of the second connecting portion 120b is connected to the first supporting portion 110a, and the other end is connected to the third supporting portion 110c. Specifically, at least one of the first supporting portion 110a and the third supporting portion 110c is movably connected to the first connecting portion 120a, so that the second connecting portion 120b can move relative to at least one of the first supporting portion 110a and the third supporting portion 110c to change the relative position of the first supporting portion 110a and the third supporting portion 110c. The signal acquisition device 10 also includes a second driving assembly 400, which is connected to the first supporting portion 110a and is used to drive the second connecting portion 120b to move relative to the first supporting portion 110a. In this scheme, the first supporting part 110a is connected to two driving components (i.e., the first driving component 300 and the second driving component 400), and the two connecting parts 120 (i.e., the first connecting part 120a and the second connecting part 120b) can move relative to the first supporting part 110a. On the one hand, the installation space of the first supporting part 110a can be fully utilized. In a further embodiment, a pressure sensor 600 connected to the first supporting part 110a can be used to provide feedback to the two driving components simultaneously, thereby improving control efficiency.

[0084] The first connecting portion 120a and the second connecting portion 120b can be connected to the same side, adjacent side, or opposite side of the first supporting portion 110a. See also Figure 1 - Figure 6 In some embodiments, the third abutment 110c is used to abut the right side of the head 20. The first connecting part 120a and the second connecting part 120b are respectively connected to the opposite sides of the first abutment 110a. This allows the pulling force of the first connecting part 120a on the first abutment 110a and the pulling force of the second connecting part 120b on the first abutment 110a to partially cancel each other out when the first driving component 300 and the second driving component 400 are driven simultaneously. This effectively prevents the position of the first abutment 110a from deviating and improves the positioning accuracy of the acquisition unit 210 on the head 20.

[0085] When the second drive assembly 400 is located within the inner cavity 111 of the first abutment portion 110a, and the second end portion 121b is twisted 90° and wound around the second winding portion 420, in order to provide sufficient transition space for the second end portion 121b, the second winding portion 420 and the port on the first abutment portion 110a through which the second end portion 121b passes need to maintain a certain distance, so that irreversible torsional deformation or wrinkling does not easily occur during the 90° twisting of the second end portion 121b. To meet the above requirements, see [reference needed]. Figure 1 - Figure 5In some embodiments, the second drive assembly 400 is located on the side of the inner cavity 111 opposite to the third abutment portion 110c. This arrangement provides sufficient torsional space for the second end portion 121b, thereby ensuring smooth winding of the second winding portion 420 around the second end portion 121b. In other embodiments, see... Figure 8 After the second end portion 121b extends into the first supporting portion 110a, it can be directly wound around the second winding portion 420 without twisting. Specifically, the second connecting portion 120b includes a second intermediate strip 122b located between the third supporting portion 110c and the first supporting portion 110a, and the rotation axis of the second winding portion 420 is parallel to the width direction of the second intermediate strip 122b of the second connecting portion 120b. At this time, the second winding portion 420 can also be disposed on the side of the first supporting portion 110a closer to the third supporting portion 110c, thereby reducing the space occupied by the second end portion 121b in the first supporting portion 110a and making it easier to wind the second end portion 121b.

[0086] In whole-brain signal testing, the quality of the acquired brain signal data directly affects whether the signal acquisition device 10 is worn properly and whether the acquisition unit 210 on the signal acquisition device 10 makes good contact with the scalp. The assessment of the wearing status relies on the impedance information at each acquisition unit 210. Actual brain signal testing can only be performed when the contact impedance values ​​at all acquisition units 210 are adjusted to within the preset impedance values. Adjusting the impedance values ​​at the acquisition units 210 requires a significant amount of time. Therefore, see [link to relevant documentation]. Figure 1 - Figure 6 In some embodiments, the signal acquisition device 10 includes a third driving component 500. The third driving component 500 is connected to the first supporting part 110a and the acquisition part 210, respectively. The third driving component 500 is configured to drive the acquisition part 210 to move relative to the first supporting part 110a, specifically, it can drive the acquisition part 210 to move towards or away from the head 20. Since the impedance value between the acquisition part 210 and the scalp can be changed by changing the contact relationship between the acquisition part 210 and the scalp, in this embodiment, by adding the third driving component 500 to drive the acquisition part 210 to move, the relative position of the acquisition part 210 and the scalp can be adjusted after the fixing bracket 100 and the head 20 are fixed, thereby adjusting the impedance value between the acquisition part 210 and the scalp, thus improving the signal acquisition efficiency. In this solution, compared to the solution of adjusting the impedance value of the acquisition unit 210 by adjusting the fixed position and fixed pressure of the fixed bracket 100, the adjustment of the fixed comfort of the fixed bracket 100 and the adjustment of the impedance value between the acquisition unit 210 and the scalp do not interfere with each other. Therefore, the fixed comfort and impedance value are easier to adjust in this solution.

[0087] The position adjustment between the acquisition unit 210 and the scalp can be manual or automatic. In some embodiments, the signal acquisition device 10 further includes a controller 220, which is connected to the third driving component 500 and the acquisition unit 210. The controller 220 controls the operation of the third driving component 500 based on the brain signals acquired by the acquisition unit 210. For example, when the acquisition unit 210 is used to acquire EEG signals, if the impedance value between the acquisition unit 210 and the head 20 received by the controller 220 is greater than a preset impedance value, the controller 220 controls the third driving component 500 to drive the acquisition unit 210 to move closer to the head 20, thereby increasing the contact area between the acquisition unit 210 and the scalp and reducing the impedance value between the acquisition unit 210 and the head 20. If the impedance value between the acquisition unit 210 and the head 20 received by the controller 220 is less than or equal to the preset impedance value, it is considered that the impedance value has been adjusted to a suitable range, and the controller 220 controls the third driving component 500 to stop driving. If the pressure values ​​between each support part 110 and the head are within the preset pressure range, then the detection of EEG signals can begin. In this scheme, the impedance value between the acquisition part 210 and the scalp can automatically provide feedback to the third drive component 500, which is more efficient than the scheme where the operator observes the impedance value on the screen and manually adjusts the position of the acquisition part 210. It should be noted that the pressure adjustment process and the impedance value adjustment process can be performed sequentially or simultaneously. When both are performed simultaneously, the brain signal detection is performed only if both the pressure value and the impedance value meet the requirements; when they are performed sequentially, the pressure value can be adjusted first and then the impedance value, or vice versa. When the pressure regulation process and the impedance value regulation process are sequential, both the pressure value and the impedance value must meet the requirements simultaneously before subsequent brain signal detection can proceed. For example, if the pressure value is adjusted first and then the impedance value is adjusted, and after the impedance value is adjusted to a suitable value, if the adjustment of the impedance value affects the pressure value and causes the pressure value to be outside the preset pressure range, then the above steps need to be repeated until both the pressure value and the impedance value meet the requirements before brain signal detection can proceed.

[0088] See Figure 1 - Figure 6In some embodiments, the first abutment portion 110a is adapted to abut against one side of the head 20 and has a clearance hole 112, with the third drive assembly 500 at least partially located within the clearance hole 112. The collection portion 210 is connected to the end of the third drive assembly 500 adapted to face the head 20, and the third drive assembly 500 is configured to drive the collection portion 210 to extend or retract beyond the clearance hole 112. In this design, on the one hand, the collection portion 210, the third drive assembly 500, and the first abutment portion 110a do not interfere with each other in position, and the collection portion 210 can be more easily positioned in the middle of the first abutment portion 110a, facilitating good contact between the collection portion 210 and the scalp; on the other hand, it reduces the space occupied by the collection portion 210, the third drive assembly 500, and the first abutment portion 110a, resulting in a more compact structure. In the above embodiments, the first abutment portion 110a may or may not have an inner cavity 111. When the first abutment portion 110a has an inner cavity 111, and the first drive assembly 300 and the second drive assembly 400 are both disposed in the inner cavity 111, the clearance hole 112 can communicate with the inner cavity 111, and the first end portion 121a and the second end portion 121b are respectively located on the same side or opposite sides of the third drive assembly 500.

[0089] The clearance hole 112 can be a blind hole or a through hole. When the clearance hole 112 is a blind hole, the third drive assembly 500 is completely located within the first abutment portion 110a, and the first abutment portion 110a provides better protection for the third drive assembly 500. See also Figure 1 - Figure 6 In some embodiments, the clearance hole 112 penetrates the first abutment portion 110a, and the third drive assembly 500 extends out of the clearance hole 112 on the side opposite to the collection portion 210. In this design, the arrangement of the third drive assembly 500 is not limited by the thickness of the first abutment portion 110a, thus allowing the third drive assembly 500 to have a larger volume while the first abutment portion 110a can have a smaller volume. Furthermore, the third drive assembly 500 may include a protective shell 520, which may have one end inserted into the clearance hole 112 of the first abutment portion 110a and one end extending out of the abutment portion 110a. The protective shell 520 covers the end of the drive motor of the third drive assembly 500 opposite to the collection portion 210, thereby preventing external foreign objects from entering the first abutment portion 110a through the clearance hole 112.

[0090] See Figure 1 as well as Figure 7In some embodiments, when the fixing bracket 100 is a hollow frame, it can be constructed from multiple straps. Specifically, the fixing bracket 100 includes a horizontal strap 130 and a vertical strap 140. The horizontal strap 130 is adapted to be arranged around the head 20 around the vertical axis, and the vertical strap 140 is adapted to be arranged around the upper end of the head 20 around the horizontal axis. The two ends of the vertical strap 140 are respectively connected to the horizontal strap 130. The fixing bracket 100 may include one or more horizontal straps 130 and one or more vertical straps 140. In this embodiment, the fixing bracket 100 includes one horizontal strap 130 and two vertical straps 140, which are arranged crosswise. In some embodiments, the transverse band 130 includes a first abutment portion 110a, a second abutment portion 110b, a third abutment portion 110c, a first connecting portion 120a, and a second connecting portion 120b; in other embodiments, the vertical band 140 includes a first abutment portion 110a, a second abutment portion 110b, a third abutment portion 110c, a first connecting portion 120a, and a second connecting portion 120b. In this design, the fixed support 100 can be constructed using multiple bands, resulting in a simpler structure and lower processing costs compared to a fixed support 100 with a hemispherical shell.

[0091] See Figure 1 as well as Figure 7 In some embodiments, the fixation brace 100 further includes a chin connecting strap 150, which includes a first strap body 151 and a second strap body 152. The first strap body 151 and the second strap body 152 are respectively connected to opposite sides of the transverse strap 130. The end of the first strap body 151 facing away from the transverse strap 130 is provided with a first connecting structure 153, and the end of the second strap body 152 facing away from the transverse strap 130 is provided with a second connecting structure 154. The first connecting structure 153 and the second connecting structure 154 are detachably connected. This design makes it easier to wear and remove the fixation brace 100.

[0092] See Figure 9 - Figure 10 A second aspect of the present invention also provides a signal acquisition method, which can be used in the signal acquisition device 10 of any of the above embodiments. See details. Figure 9 The signal acquisition method includes the following steps:

[0093] S102: Acquire the pressure value between the signal acquisition device 10 and the head 20;

[0094] S104: When the pressure value is outside the preset pressure range, change the relative position between the first supporting part 110a and the second supporting part 110b to change the pressure value and bring the pressure value within the preset pressure range.

[0095] S106: The control acquisition unit 210 acquires brain signals.

[0096] The method for acquiring the pressure value between the signal acquisition device 10 and the head 20 can be determined according to actual needs. The pressure value can be a quantified value or an estimated value. For example, in some embodiments, the signal acquisition device 10 may include a pressure sensor 600, where the pressure value is a quantified value, specifically the value sensed by the pressure sensor 600. When the specific value sensed by the pressure sensor 600 is outside a preset pressure range, the relative positions of the first abutment 110a and the second abutment 110b can be changed (this can be done manually or automatically by the first drive assembly 300 and / or the second drive assembly 400). When the relative positions of the first abutment 110a and the second abutment 110b change, the pressure between the fixed bracket 100 and the head 20 changes, i.e., the pressure value sensed by the pressure sensor 600 changes. This is repeated until the pressure value is within the preset pressure range. In other embodiments, the pressure value can be an estimate. In this case, the operator estimates the pressure value based on the pressure state of the fixed bracket 100 and the head 20. When the pressure state is ideal, the pressure value is considered to be within the preset pressure range. When the pressure state is not ideal, the relative positions of the first supporting part 110a and the second supporting part 110b are manually adjusted until the pressure state is ideal.

[0097] In some embodiments, after changing the relative position between the first abutment 110a and the second abutment 110b to change the pressure value and bring it within the preset pressure range when the pressure value is outside the preset pressure range, the method further includes the following step: controlling the acquisition unit 210 to acquire brain signals. In other words, in this embodiment, the wearing state of the fixation bracket 100 is adjusted first, and then brain signals are acquired to improve the accuracy of brain signal acquisition. The adjustment method of the fixation bracket 100 has been described above and will not be repeated here.

[0098] In some embodiments, the step of the control acquisition unit 210 acquiring brain signals includes:

[0099] Acquire the measured impedance value between the acquisition unit 210 and the head 20;

[0100] When the measured impedance value is greater than the preset impedance value, the acquisition unit 210 is driven to move towards the head 20 to reduce the measured impedance value to less than or equal to the preset impedance value.

[0101] Brain signals were collected from 20 brain regions.

[0102] Before acquiring brain signals, the impedance between the acquisition unit 210 and the head 20 must be less than or equal to a preset impedance value. Specifically, the measured impedance value is used to control the third drive assembly 500 to move the acquisition unit 210 relative to the head 20, adjusting the impedance value to be less than or equal to the preset impedance value. When the measured impedance value is higher than the preset impedance value, it is considered that the contact area between the acquisition unit 210 and the head 20 is too small, and the acquisition unit 210 needs to be moved closer to the head 20 to increase the contact area between the acquisition unit 210 and the head 20, thereby reducing the impedance value between the acquisition unit 210 and the head 20. When the measured impedance value is less than or equal to the preset impedance value, it is considered that the impedance value has been adjusted to a suitable range, and the controller 220 controls the third drive assembly 500 to stop driving. At this time, if the pressure value between each support part 110 and the head 20 is also within the preset pressure range, brain signal detection can begin.

[0103] The acquisition unit 210 is used to acquire brain signals, specifically one or more of the following: electroencephalogram (EEG) signals, brain infrared signals, brain magnetic resonance (MER) signals, brain oxygenation signals, or brain ultrasound signals. When the acquisition unit 210 acquires EEG signals, the impedance value between the acquisition unit 210 and the head 20 directly affects the quality of EEG signal acquisition. When the acquisition unit 210 acquires other signals, the wearing comfort of the signal acquisition device 10 can also be adjusted by adjusting the impedance between the acquisition unit 210 and the head 20.

[0104] See Figure 10 The following is a signal acquisition method in a specific embodiment, which is used for, for example Figure 1 - Figure 8 The signal acquisition device 10 shown:

[0105] S201: Fix the fixing bracket 100 to the head 20;

[0106] S202: Controller 220 acquires the pressure value sensed by pressure sensor 600;

[0107] S203: Compare the pressure value with the preset pressure range; when the pressure value sensed by the pressure sensor 600 is less than the preset pressure range, execute step S204; when the pressure value sensed by the pressure sensor 600 is greater than the preset pressure range, execute step S205; when the pressure value sensed by the pressure sensor 600 is within the preset pressure range, execute step S206.

[0108] S204: Drive the first winding part 320 and the second winding part 420 to rotate forward to wind the first end 121a and the second end 121b respectively, and return to the execution step S202;

[0109] S205: Drive the first winding portion 320 and the second winding portion 420 to reverse, so as to release portions of the first end 121a and the second end 121b respectively, and return to the execution step S202;

[0110] S206: The controller 220 acquires the measured impedance value between the acquisition unit 210 and the head 20;

[0111] S207: Compare the measured impedance value with the preset impedance value. If the measured impedance value is greater than the preset impedance value, proceed to step S208; if the measured impedance value is less than or equal to the preset impedance value, proceed to step S209.

[0112] S208: Drive the acquisition unit 210 to move towards the head 20 and return to execute step S206;

[0113] S209: When the pressure value sensed by the pressure sensor 600 is within the preset pressure range and the measured impedance value is less than or equal to the preset impedance value, step S210 is executed; wherein, steps S206, S207, and S208 can be executed simultaneously with steps S201, S202, S203, S204, and S205.

[0114] S210: Collect brain signals.

[0115] It should be noted that if directional indications (such as up, down, left, right, front, back, etc.) are involved in the embodiments of the present invention, these directional indications are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. When a direction reference is introduced in a specific embodiment, unless the direction is specifically limited to unidirectional, the direction can be unidirectional or bidirectional (two parallel and opposite directions). Whether it is unidirectional or bidirectional depends on what those skilled in the art can achieve. When the direction reference is bidirectional, it should be considered that two parallel and different embodiments have been introduced simultaneously.

[0116] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or," "and / or," or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0117] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of patent protection of the present invention.

Claims

1. A signal acquisition device, characterized in that, include: A fixing bracket is adapted to be fixed to the head. The fixing bracket includes a first abutting part, a second abutting part, and a first connecting part. The first abutting part and the second abutting part are both adapted to abut against the head. One end of the first connecting part is connected to the first abutting part, and the other end is connected to the second abutting part. A signal acquisition assembly includes an acquisition unit for acquiring brain signals, the acquisition unit being connected to the fixed bracket; In this configuration, at least one of the first abutting portion and the second abutting portion is movably connected to the first connecting portion, and the first connecting portion is movable relative to at least one of the first abutting portion and the second abutting portion to change the relative position of the first abutting portion and the second abutting portion.

2. The signal acquisition device as described in claim 1, characterized in that, The signal acquisition device further includes a first driving component, which is connected to the first supporting part and the first connecting part respectively. The first driving component is used to drive the first connecting part to move relative to the first supporting part.

3. The signal acquisition device as described in claim 2, characterized in that, The first drive assembly includes a first drive motor and a first winding portion. The first connecting portion includes a first end facing away from the second abutting portion. The first end is connected to the first winding portion. The first drive motor is connected to the first winding portion to drive the first winding portion to wind the first end.

4. The signal acquisition device as described in claim 2, characterized in that, The signal acquisition device further includes a pressure sensor and a controller. The pressure sensor is connected to the fixed bracket and is adapted to acquire the pressure value between the fixed bracket and the head. The pressure sensor and the first drive component are both connected to the controller. The controller is configured to control the first drive component to work according to the pressure value acquired by the pressure sensor, so that the pressure value is adjusted to a preset pressure range.

5. The signal acquisition device as described in claim 4, characterized in that, The pressure sensor is connected to the first abutment portion; and / or, the pressure sensor is connected to the second abutment portion; and / or, the pressure sensor is connected to the first connection portion.

6. The signal acquisition device as described in claim 2, characterized in that, The first abutment portion defines an inner cavity, the first drive assembly is disposed in the inner cavity, and the first connecting portion includes a first end portion facing away from the second abutment portion, the first end portion passing through the inner cavity and connected to the first drive assembly.

7. The signal acquisition device as described in claim 6, characterized in that, The first drive assembly includes a first drive motor and a first winding portion. The first end is connected to the first winding portion, and the first drive motor is connected to the first winding portion to drive the first winding portion to wind the first end. The first connecting portion is strip-shaped, and the first connecting portion includes a first intermediate strip located between the first abutting portion and the second abutting portion; The width direction of the first intermediate strip is parallel to the rotation axis direction of the first winding portion; or the width direction of the first intermediate strip intersects the rotation axis direction of the first winding portion.

8. The signal acquisition device as described in claim 2, characterized in that, The signal acquisition device further includes a second connecting part and a third supporting part, wherein one end of the second connecting part is connected to the first supporting part and the other end is connected to the third supporting part; The signal acquisition device further includes a second driving component, which is connected to the first supporting portion and is used to drive the second connecting portion to move relative to the first supporting portion.

9. The signal acquisition device as described in claim 8, characterized in that, The first abutting portion defines an inner cavity, and both the first driving component and the second driving component are disposed in the inner cavity; The first driving component is located on the side of the inner cavity that is close to or away from the second abutment; and / or, the second driving component is located on the side of the inner cavity that is close to or away from the third abutment.

10. The signal acquisition device as described in claim 1, characterized in that, The collecting part is connected to the first supporting part and / or the second supporting part.

11. The signal acquisition device as described in claim 1, characterized in that, The signal acquisition device includes a third driving component, which is connected to the first supporting part and the acquisition part respectively. The third driving component is configured to drive the acquisition part to move relative to the first supporting part.

12. The signal acquisition device as described in claim 11, characterized in that, The signal acquisition device further includes a controller, which is connected to the third driving component and the acquisition unit. The controller controls the third driving component to work based on the brain signals acquired by the acquisition unit.

13. The signal acquisition device as described in claim 11, characterized in that, The first abutting part is adapted to abut against one side of the head and has a clearance hole. The third driving component is at least partially located in the clearance hole. The collecting part is connected to the end of the third driving component adapted to face the head. The third driving component is configured to drive the collecting part to extend or retract from the clearance hole.

14. The signal acquisition device as described in claim 13, characterized in that, The clearance hole penetrates the first abutment portion, and the third drive component extends out of the clearance hole from the side opposite to the acquisition portion.

15. The signal acquisition device as described in claim 1 or 11, characterized in that, The acquisition unit includes at least one of the following: an electroencephalogram (EEG) sensor for acquiring EEG signals, an infrared brain sensor for acquiring infrared brain signals, a magnetic brain sensor for acquiring magnetic brain signals, an oxygen brain sensor for acquiring oxygen brain signals, or an ultrasound brain sensor for acquiring ultrasound brain signals.

16. The signal acquisition device as described in claim 1, characterized in that, The fixing bracket includes a horizontal band and a vertical band. The horizontal band is adapted to be arranged around the head around the vertical axis, and the vertical band is adapted to be arranged around the upper end of the head around the horizontal axis. The two ends of the vertical band are respectively connected to the horizontal band. The transverse band includes the first abutting portion, the second abutting portion, and the first connecting portion; and / or, the vertical band includes the first abutting portion, the second abutting portion, and the first connecting portion.

17. The signal acquisition device as described in claim 16, characterized in that, The fixation bracket also includes a mandibular connecting band, which includes a first band body and a second band body. The first band body and the second band body are respectively connected to opposite sides of the transverse band along the transverse direction. The end of the first band body facing away from the transverse band and the end of the second band body facing away from the transverse band are detachably connected.

18. A signal acquisition method, used in the signal acquisition device according to any one of claims 1-17, characterized in that, The signal acquisition method includes the following steps: Acquire the pressure value between the signal acquisition device and the head; When the pressure value is outside the preset pressure range, the relative position between the first supporting part and the second supporting part is changed to change the pressure value and cause the pressure value to be within the preset pressure range; The acquisition unit is controlled to acquire brain signals.

19. The signal acquisition method as described in claim 18, characterized in that, The steps for controlling the acquisition unit to acquire brain signals include: Obtain the measured impedance value between the acquisition unit and the head; When the measured impedance value is greater than the preset impedance value, the acquisition unit is driven to move towards the head to reduce the measured impedance value to less than or equal to the preset impedance value. Brain signals from the head were collected.

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