Brain function imaging device and method, edge computing device and medium

Abstract

The embodiment of the invention provides brain function imaging equipment and method, edge computing equipment and a medium. The brain function imaging equipment comprises a sensor and a control circuit, the sensor comprises a plurality of multi-channel interfaces, different multi-channel interfaces form different detection assemblies, and the different detection assemblies correspond to different detection areas of the brain of a user; the control circuit is used for sending a control signal to the detection assembly; the detection assembly is used for responding to the control signal, collecting a detection signal of a corresponding detection area and outputting the detection signal to the control circuit; the control circuit is also used for generating an fNIRS signal according to the detection signal. According to the brain function imaging device, different detection assemblies can be formed through different multi-channel interfaces, detection signals of different detection areas are detected through the different detection assemblies, the detection assemblies are flexible in layout, signal collection modes are flexible and diversified, and therefore diversified user requirements are met.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of brain imaging technology, and in particular to a brain function imaging device and method, an edge computing device and a medium. Background Art

[0002] Functional near infrared spectrum (fNIRS) technology is a brain function imaging technology used to measure changes in brain hemoglobin concentration to indirectly reflect the degree of brain activity. After being worn on the user's head, the fNIRS-based brain function imaging device can collect light signals used to measure changes in the user's brain hemoglobin concentration.

[0003] In the related art, the probe layout of the brain function imaging device is fixed and the signal acquisition method is single, which makes the signal acquisition of the brain function imaging device inflexible and unable to meet the diverse needs of users. Summary of the invention

[0004] In view of this, the embodiments of the present application provide a brain function imaging device and method, an edge computing device and a medium, which are used to make the layout of detection components flexible and the signal acquisition methods flexible and diverse, so as to meet diverse user needs.

[0005] A first aspect provides a brain function imaging device, comprising: a sensor and a control circuit, wherein the sensor comprises a plurality of multi-channel interfaces, different multi-channel interfaces form different detection components, and different detection components correspond to different detection areas of a user's brain; The control circuit is used to send a control signal to the detection component; The detection component is used to collect a detection signal of a corresponding detection area in response to the control signal, and output the detection signal to the control circuit; The control circuit is further configured to generate an fNIRS signal according to the detection signal.

[0006] In a possible implementation manner, the plurality of multi-channel interfaces include a first multi-channel interface, a second multi-channel interface, a third multi-channel interface, and a fourth multi-channel interface; If the first multi-channel interface forms a detection component, the detection area corresponding to the detection component includes the frontal lobe area; or, If the second multi-channel interface forms a detection component, the detection area corresponding to the detection component includes the occipital lobe area; or, If the third multi-channel interface and the fourth channel interface form a detection component, the detection area corresponding to the detection component includes the parietal lobe area; or, If the first multi-channel interface, the third multi-channel interface and the fourth multi-channel interface form a detection component, the detection area corresponding to the detection component includes the parietal lobe area and the frontal lobe area; or, If the second multi-channel interface, the third multi-channel interface and the fourth multi-channel interface form a detection component, the detection area corresponding to the detection component includes the parietal lobe area and the occipital lobe area; or, If the first multi-channel interface, the second multi-channel interface, the third multi-channel interface and the fourth multi-channel interface form a detection component, the detection area corresponding to the detection component includes a frontal lobe area, a parietal lobe area and an occipital lobe area.

[0007] In a possible implementation, the first multi-channel interface includes a 16-channel interface, the second multi-channel interface includes a 16-channel interface, the third multi-channel interface includes a 12-channel interface, and the fourth multi-channel interface includes a 12-channel interface.

[0008] In a possible implementation, the multi-channel interface includes a plurality of emitting light sources and a plurality of receivers, and each of the emitting light sources corresponds to a plurality of the receivers; The emitting light source is used to light up in sequence according to the control signal to send a first light signal to the detection area; The receiver is used to receive the second optical signal reflected by the detection area, and perform photoelectric conversion on the second optical signal to generate the detection signal.

[0009] In a possible implementation, the control signal includes a power control signal and a lighting control signal, and the control circuit includes: a main control chip, a signal processing module and a control module, the signal processing module is connected between the multi-channel interface and the main control chip, and the control module is connected between the main control chip and the multi-channel interface; The signal processing module is used to receive the detection signal collected by the detection component and generate the fNIRS signal according to the detection signal; The main control chip is used to receive the fNIRS signal transmitted by the signal processing module; The control module is used to receive a power selection signal sent by the host computer, generate a power control signal according to the power selection signal and send the power control signal to the emitting light source; receive a lighting signal sent by the host computer, generate the lighting control signal according to the lighting signal, and output the lighting control signal to the corresponding emitting light source.

[0010] In a possible implementation, the signal processing module includes a first multiplexer, a first conversion module corresponding to each of the receivers, and two second conversion modules, each first conversion module is connected to the corresponding receiver, and the first conversion module is connected to the first multiplexer, and the two second conversion modules are connected between the first multiplexer and the main control chip and are connected to each other; The first conversion module is used to convert the detection signal output by the corresponding receiver into a voltage signal, and output the voltage signal to the first multiplexer; The first multiplexer is used to select two analog voltage signals from the multiple voltage signals, and output the two analog voltage signals to the two second conversion modules respectively; A second conversion module is used to output the analog voltage signal to another second conversion module, and another second conversion module is used to combine two analog voltage signals into an analog output signal and perform analog-to-digital conversion on the analog output signal to generate the fNIRS signal.

[0011] In a possible implementation, the lighting signal includes a first lighting signal and a second lighting signal, and the lighting control signal includes a first lighting control signal and a second lighting control signal; the control module includes: a second multiplexer, a plurality of gear resistors, a third multiplexer and a fourth multiplexer, the second multiplexer is connected between the main control chip and the plurality of gear resistors, the third multiplexer is connected between the plurality of gear resistors and the plurality of emitting light sources, and the fourth multiplexer is connected between the main control chip and the plurality of emitting light sources; The main control chip is used to send a power selection signal to the second multiplexer; The second multiplexer is used to generate a gear selection signal according to the power selection signal, and output a power control signal to the third multiplexer through a gear resistor corresponding to the gear selection signal; The third multiplexer is used to output the power control signal to the multiple emitting light sources, and the power control signal is used to control the power of the multiple emitting light sources; The third multiplexer is used to output the first lighting control signal to the corresponding emitting light source according to the first lighting signal output by the main control chip; The fourth multiplexer is used to output the second lighting control signal to the corresponding emitting light source according to the second lighting signal output by the main control chip.

[0012] In a possible implementation, the fNIRS imaging device further includes a storage module, and the storage module is connected to the main control chip; The main control chip is also used to record the timestamp of the fNIRS signal and send the fNIRS signal and the timestamp to the storage module; The storage module is used to store the fNIRS signal and timestamp.

[0013] In a possible implementation, the brain function imaging device further includes a read-write interface, the read-write interface is connected to the storage module, and the read-write interface is connected to a host computer via a connecting device; The read / write interface is used to read the fNIRS signal and the timestamp from the storage module, and send the fNIRS signal and the timestamp to the host computer through the connection device; and / or, The main control chip is also used to receive an on-command input by a user, and in response to the on-command, execute the step of recording the timestamp of the fNIRS signal, and sending the fNIRS signal and the timestamp to the storage module.

[0014] A second aspect provides a brain function imaging method, the method is applied to a brain function imaging device, the brain function imaging device comprises: a sensor and a control circuit, the sensor comprises a plurality of multi-channel interfaces, different multi-channel interfaces form different detection components, and different detection components correspond to different detection areas of a user's brain; The method comprises: The control circuit sends a control signal to the detection component, so that the detection component collects a detection signal of a corresponding detection area in response to the control signal; The control circuit generates an fNIRS signal according to the detection signal output by the detection component.

[0015] In a possible implementation, the plurality of multi-channel interfaces include a plurality of emitting light sources and a plurality of receivers, each of the emitting light sources corresponds to a plurality of the receivers, and the control signal includes a power control signal and a lighting control signal; The control circuit sends a control signal to the detection component, including: The control circuit receives a power selection signal sent by the host computer, generates a power control signal according to the power selection signal, and sends the power control signal to the transmitting light source; The control circuit receives a lighting signal sent by a host computer, generates the lighting control signal according to the lighting signal, and outputs the lighting control signal to a corresponding emitting light source.

[0016] In a possible implementation, the control circuit generates an fNIRS signal according to the detection signal output by the detection component, including: Convert the detection signal into a voltage signal, and select two analog voltage signals from a plurality of voltage signals; The two analog voltage signals are combined into an analog output signal and the analog output signal is subjected to analog-to-digital conversion to generate the fNIRS signal.

[0017] In a possible implementation, the lighting signal includes a first lighting signal and a second lighting signal, and the lighting control signal includes a first lighting control signal and a second lighting control signal; The control circuit generates a power control signal according to the power selection signal and sends the power control signal to the detection component, including: Generate a gear selection signal according to the power selection signal, generate a power control signal according to the gear selection signal, and output the power control signal to the multiple emitting light sources, wherein the power control signal is used to control the power of the multiple emitting light sources; The control circuit generates the lighting control signal according to the lighting signal and outputs the lighting control signal to the detection component, including: Outputting the first lighting control signal to the corresponding emitting light source according to the first lighting signal; The second lighting control signal is output to the corresponding emitting light source according to the second lighting signal.

[0018] The third aspect provides an edge computing device, one or more processors; a memory; and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the edge computing device, enable the edge computing device to perform the brain function imaging method in the above-mentioned second aspect or any possible implementation of the second aspect.

[0019] In a possible implementation, the edge computing device also includes: a brain function imaging device in the above-mentioned first aspect or any possible implementation of the first aspect.

[0020] A fourth aspect provides a computer-readable storage medium, which includes a stored program, wherein when the program is run, the brain function imaging device where the computer-readable storage medium is located is controlled to execute the brain function imaging method in the above-mentioned second aspect or any possible implementation of the second aspect.

[0021] In the technical solution provided in the embodiment of the present application, the brain function imaging device includes a sensor and a control circuit. The sensor includes multiple multi-channel interfaces. Different multi-channel interfaces form different detection components. Different detection components correspond to different detection areas of the user's brain. The control circuit sends a control signal to the detection component. The detection component collects the detection signal of the corresponding detection area in response to the control signal and outputs the detection signal to the control circuit. The control circuit generates an fNIRS signal according to the detection signal. In the embodiment of the present application, the brain function imaging device can form different detection components through different multi-channel interfaces, and detect the detection signals of different detection areas through different detection components. The layout of the detection components is flexible, and the signal acquisition method is flexible and diverse, thereby meeting the diverse needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 A schematic diagram of the structure of a brain function imaging device provided in an embodiment of the present application; FIG. 2A to FIG. 2F A schematic diagram of the structure of the detection component provided in the embodiment of the present application; FIG. 3A to FIG. 3F A schematic diagram of a detection area provided in an embodiment of the present application; Figure 4 A schematic diagram of the structure of a control circuit provided in an embodiment of the present application; Figure 5 for Figure 1 Schematic diagram of the detailed structure of the midbrain functional imaging device; Figure 6 A schematic diagram of lighting up an emitting light source provided in an embodiment of the present application; Fig. 7A A flowchart of a brain function imaging method provided in an embodiment of the present application; Figure 7B A flowchart of a control signal processing method provided in an embodiment of the present application; Figure 7C A flowchart of a method for generating an fNIRS signal provided in an embodiment of the present application; Figure 8 A schematic diagram of the structure of an edge computing device provided in an embodiment of the present application; Fig. 9 A schematic diagram of the structure of another edge computing device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0025] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0026] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0027] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0028] Figure 1 A schematic diagram of the structure of a brain function imaging device provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the brain function imaging device includes: a sensor and a control circuit, the sensor includes a plurality of multi-channel interfaces, different multi-channel interfaces form different detection components, and different detection components correspond to different detection areas of the user's brain.

[0029] The control circuit is used to send a control signal to the detection component; the detection component is used to collect the detection signal of the corresponding detection area in response to the control signal, and output the detection signal to the control circuit; the control circuit is also used to generate an fNIRS signal according to the detection signal.

[0030] like Figure 1 As shown, as an optional solution, the multiple multi-channel interfaces include a first multi-channel interface, a second multi-channel interface, a third multi-channel interface and a fourth multi-channel interface, and the sensor may include four multi-channel interfaces, that is, the sensor includes a first multi-channel interface, a second multi-channel interface, a third multi-channel interface and a fourth multi-channel interface. In practical applications, the number of multi-channel interfaces in the sensor can be set as needed, and the embodiments of the present application do not limit this.

[0031] In the embodiment of the present application, different multi-channel interfaces among the plurality of multi-channel interfaces may be combined to form different detection components. FIG. 2A to FIG. 2FA schematic diagram of the structure of the detection component provided in the embodiment of the present application, FIG. 3A to FIG. 3F A schematic diagram of the detection area provided in an embodiment of the present application.

[0032] In the embodiment of the present application, the multi-channel interface includes multiple emitting light sources and multiple receivers, and each emitting light source corresponds to multiple receivers. The emitting light sources are used to light up in sequence according to the control signal to send a first light signal to the detection area; the receiver is used to receive the second light signal reflected by the detection area, and perform photoelectric conversion on the second light signal to generate a detection signal. Among them, a channel is formed between the emitting light source and each connected receiver.

[0033] As an alternative, Figure 2A As shown, the first multi-channel interface 11 forms a detection component, and the first multi-channel interface 11 may include multiple emitting light sources a and multiple receivers b, and each emitting light source a corresponds to multiple receivers b. Figure 2A As shown, the first multi-channel interface 11 includes 4 emitting light sources a and 10 receivers b. Each emitting light source a corresponds to 4 receivers b, so a total of 16 channels are formed between the 4 emitting light sources a and the 10 receivers b. Therefore, the first multi-channel interface 11 may include a 16-channel interface. Figure 2A and Figure 3A As shown, the detection area corresponding to the detection component formed by the first multi-channel interface 11 includes the frontal lobe area, and the first multi-channel interface 11 can be used to detect the frontal lobe area. Figure 2A As shown, the number of emitting light sources a is 4, and the number of receivers b is 10.

[0034] As another alternative, Figure 2B As shown, the second multi-channel interface 12 forms a detection component, and the second multi-channel interface 12 may include multiple emitting light sources a and multiple receivers b, and each emitting light source a corresponds to multiple receivers b. Figure 2B As shown, the second multi-channel interface 12 includes 4 emitting light sources a and 10 receivers b. Each emitting light source a corresponds to 4 receivers b, so a total of 16 channels are formed between the 4 emitting light sources a and the 10 receivers b. Therefore, the second multi-channel interface 12 may include a 16-channel interface. Figure 2B and Figure 3B As shown, the detection area corresponding to the detection component formed by the second multi-channel interface 12 includes the occipital lobe area, and the second multi-channel interface 12 can be used to detect the occipital lobe area. Figure 2B As shown, the number of emitting light sources a is 4, and the number of receivers b is 10.

[0035] As another alternative, Figure 2CAs shown, the third multi-channel interface 13 and the fourth channel interface 14 form a detection component, the third multi-channel interface 13 may include multiple emitting light sources a and multiple receivers b, each emitting light source a corresponds to multiple receivers b; the fourth multi-channel interface 14 includes multiple emitting light sources a and multiple receivers b, each emitting light source a corresponds to multiple receivers b. For example, Figure 2C As shown, the third multi-channel interface 13 includes 5 emitting light sources a and 4 receivers b. One emitting light source a located in the middle corresponds to 4 receivers b, and each of the remaining 4 emitting light sources a corresponds to 2 receivers b, so a total of 12 channels are formed between the 5 emitting light sources a and the 4 receivers b. Therefore, the third multi-channel interface 13 may include a 12-channel interface. For example, Figure 2C As shown, the fourth multi-channel interface 14 includes 5 emitting light sources a and 4 receivers b. One emitting light source a located in the middle corresponds to 4 receivers b, and each of the remaining 4 emitting light sources a corresponds to 2 receivers b, so a total of 12 channels are formed between the 5 emitting light sources a and the 4 receivers b. Therefore, the fourth multi-channel interface 14 may include a 12-channel interface. In summary, the detection component formed by the third multi-channel interface 13 and the fourth channel interface 14 includes a 24-channel interface. Figure 2C and Figure 3C As shown, the detection area corresponding to the detection assembly formed by the third multi-channel interface 13 and the fourth multi-channel interface 14 includes the parietal region, and the third multi-channel interface 13 and the fourth multi-channel interface 14 can be used to detect the parietal region. Figure 2C As shown, the number of emitting light sources a is 10 and the number of receivers b is 8.

[0036] As another alternative, Figure 2D As shown, the first multi-channel interface 11, the third multi-channel interface 13 and the fourth multi-channel interface 14 form a detection component. The first multi-channel interface 11 may include a 16-channel interface, the third multi-channel interface 13 may include a 12-channel interface, and the fourth multi-channel interface 14 may include a 12-channel interface. Then, the detection component formed by the first multi-channel interface 11, the third multi-channel interface 13 and the fourth multi-channel interface 14 may include 40 channels, and the detection component may include 40-channel interfaces. Figure 2D and Figure 3D As shown, the detection area corresponding to the detection component formed by the first multi-channel interface 11, the third multi-channel interface 13 and the fourth multi-channel interface 14 includes the frontal lobe area and the parietal lobe area, and the detection component can be used to detect the frontal lobe area and the parietal lobe area. Figure 2D As shown, the number of emitting light sources a is 14, and the number of receivers b is 18.

[0037] As another alternative, Figure 2EAs shown, the second multi-channel interface 12, the third multi-channel interface 13 and the fourth multi-channel interface 14 form a detection component. The second multi-channel interface 12 may include a 16-channel interface, the third multi-channel interface 13 may include a 12-channel interface, and the fourth multi-channel interface 14 may include a 12-channel interface. Then, the detection component formed by the second multi-channel interface 12, the third multi-channel interface 13 and the fourth multi-channel interface 14 may include 40 channels, and the detection component may include 40 channel interfaces. Figure 2E and Figure 3E As shown, the detection area corresponding to the detection component formed by the second multi-channel interface 12, the third multi-channel interface 13 and the fourth multi-channel interface 14 includes the parietal lobe area and the occipital lobe area, and the detection component can be used to detect the parietal lobe area and the occipital lobe area. Figure 2E As shown, the number of emitting light sources a is 14, and the number of receivers b is 18.

[0038] As another alternative, Figure 2F As shown, the first multi-channel interface 11, the second multi-channel interface 12, the third multi-channel interface 13 and the fourth multi-channel interface 14 form a detection component. The first multi-channel interface 11 and the second multi-channel interface 12 can both include 16-channel interfaces, and the third multi-channel interface 13 and the fourth multi-channel interface 14 can both include 12-channel interfaces. Then, the detection component formed by the first multi-channel interface 11, the second multi-channel interface 12, the third multi-channel interface 13 and the fourth multi-channel interface 14 can include 56 channels, and the detection component can include 56-channel interfaces. Figure 2F and Figure 3F As shown, the detection area corresponding to the detection component formed by the first multi-channel interface 11, the second multi-channel interface 12, the third multi-channel interface 13 and the fourth multi-channel interface 14 includes the frontal lobe area, the parietal lobe area and the occipital lobe area, and the detection component can be used to detect the frontal lobe area, the parietal lobe area and the occipital lobe area. Figure 2F As shown, the number of emitting light sources a is 18, and the number of receivers b is 28.

[0039] In the embodiment of the present application, the brain function imaging device can realize the switching of multi-channel interfaces. FIG. 2A to FIG. 2FAs shown, the brain function imaging device can switch between 16-channel interface, 24-channel interface, 40-channel interface and 56-channel interface. If the brain function imaging device needs to collect detection signals from the frontal lobe region, the first multi-channel interface 11 can be selected and the first multi-channel interface 11 can be used as a detection component; if the detection signal from the occipital lobe region needs to be collected, the second multi-channel interface 12 can be selected and the second multi-channel interface 12 can be used as a detection component; if the detection signal from the parietal lobe region needs to be collected, the third multi-channel interface 13 and the fourth multi-channel interface 14 can be selected and the third multi-channel interface 13 and the fourth multi-channel interface 14 can be used as detection components; if the detection signals from the frontal lobe region and the parietal lobe region need to be collected, the first multi-channel interface 11, the third multi-channel interface 13 and the fourth multi-channel interface 14 can be selected and the first multi-channel interface 11, The third multi-channel interface 13 and the fourth multi-channel interface 14 are used as detection components; if it is necessary to collect detection signals from the parietal lobe area and the occipital lobe area, the second multi-channel interface 12, the third multi-channel interface 13 and the fourth multi-channel interface 14 can be selected and the second multi-channel interface 12, the third multi-channel interface 13 and the fourth multi-channel interface 14 can be used as detection components; if it is necessary to collect detection signals from the frontal lobe area, the parietal lobe area and the occipital lobe area, the first multi-channel interface 11, the second multi-channel interface 12, the third multi-channel interface 13 and the fourth multi-channel interface 14 can be selected and the first multi-channel interface 11, the second multi-channel interface 12, the third multi-channel interface 13 and the fourth multi-channel interface 14 can be used as detection signals.

[0040] Specifically, in the brain function imaging device, each multi-channel interface has a female port and a male port, and the user can insert a cable into the male port of the selected multi-channel interface to realize the collection of the detection signal. When there is no cable connected to the male port, the brain function imaging device detects that the level of the male port is high, thereby determining that there is no signal connected to the multi-channel interface; when the user inserts the cable into the male port, the brain function imaging device can detect that the level of the male port is low, that is, the level of the male port is in a low state, thereby determining that there is a signal connected to the multi-channel interface.

[0041] After the user inserts the cable into the male port of the selected multi-channel interface, the selection instruction can be input on the host computer, and the brain function imaging device receives the selection instruction sent by the host computer and selects the multi-channel interface according to the selection instruction to form a detection component. For example, the user inserts the cable into the male port of the first multi-channel interface 11, and inputs the selection instruction on the host computer, the brain function imaging device receives the selection instruction sent by the host computer and selects the first multi-channel interface 11 according to the selection instruction to form a detection component, and the detection component can be used to detect the frontal lobe area; for another example, the user inserts the cable into the male ports of the first multi-channel interface 11, the second multi-channel interface 12, the third multi-channel interface 13 and the fourth multi-channel interface 14, and inputs the selection instruction on the host computer, the brain function imaging device receives the selection instruction sent by the host computer and selects the first multi-channel interface 11, the second multi-channel interface 12, the third multi-channel interface 13 and the fourth multi-channel interface 14 according to the selection instruction to form a detection component, and the detection component can be used to detect the frontal lobe area, the parietal lobe area and the occipital lobe area.

[0042] Figure 4 A schematic diagram of a control circuit provided in an embodiment of the present application is shown in FIG. Figure 4 As shown, the control signal includes a power control signal and a lighting control signal, and the control circuit includes: a main control chip, a signal processing module and a control module, the signal processing module is connected between the multi-channel interface and the main control chip, and the control module is connected between the main control chip and the multi-channel interface. The signal processing module is used to receive the detection signal collected by the detection component and generate an fNIRS signal according to the detection signal; the main control chip is used to receive the fNIRS signal transmitted by the signal processing module; the control module is used to receive the power selection signal power control signal sent by the host computer and send the power control signal to the transmitting light source; receive the lighting signal sent by the host computer, generate the lighting control signal according to the lighting signal, and output the lighting control signal to the corresponding transmitting light source.

[0043] Figure 5 for Figure 1 The specific structural diagram of the midbrain functional imaging device is as follows: Figure 4 and Figure 5 As shown, the signal processing module includes a first multiplexer (Multiplexer, MUX), a first conversion module 21 corresponding to each receiver b, and two second conversion modules. Each first conversion module 15 is connected to the corresponding receiver b, and the first conversion module 15 is connected to the first MUX. The two second conversion modules are connected between the first MUX and the main control chip and are connected to each other. Figure 5As shown, the first conversion module 15 is used to convert the detection signal output by the corresponding receiver b into a voltage signal, and output the voltage signal to the first MUX; the first MUX is used to select two analog voltage signals from multiple voltage signals, and output the two analog voltage signals to two second conversion modules respectively; one second conversion module is used to output the analog voltage signal to another second conversion module, and the other second conversion module is used to combine the two analog voltage signals into an analog output signal and perform analog-to-digital conversion on the analog output signal to generate an fNIRS signal. Figure 5 As shown, the number of the first conversion modules 15 may be the same as the number of the receivers b. For example, the number of the receivers b may be 10, 18 or 28.

[0044] like Figure 4 and Figure 5 As shown, the lighting signal includes a first lighting signal and a second lighting signal, the lighting control signal includes a first lighting control signal and a second lighting control signal, and the control module includes: a second MUX, a plurality of gear resistors, a third MUX and a fourth MUX, the second MUX is connected between the main control chip and the plurality of gear resistors, the third MUX is connected between the plurality of gear resistors and the plurality of emission light sources a, and the fourth MUX is connected between the main control chip and the plurality of emission light sources a. Figure 5 As shown, the main control chip is used to send a power selection signal to the second MUX; the second MUX is used to generate a gear selection signal according to the power selection signal, and output a power control signal to the third MUX through the gear resistor corresponding to the gear selection signal; the third MUX is used to output the power control signal to multiple transmitting power supplies a, and the power control signal is used to control the power of multiple transmitting light sources; the third MUX is used to output a first lighting control signal to the corresponding transmitting power supply a according to the first lighting signal output by the main control chip; the fourth MUX is used to output a second lighting control signal to the corresponding transmitting light source a according to the second lighting signal output by the main control chip. For example, the number of gear resistors can be four, and the multiple gear resistors can include gear resistor L0, gear resistor L1, gear resistor L2 and gear resistor L3.

[0045] Combine the following Figure 4 and Figure 5 , the working process of the brain function imaging device of the embodiment of the present application is described in detail.

[0046] At present, in order to make the cap of the brain function imaging device fit different head circumferences when the user wears the brain function imaging device, two caps of different models and sizes are set, and the distances between the transmitting light source and the receiver corresponding to different caps are different. In order to prevent the signal acquisition depth from being insufficient at a long distance, a power switching function is added to the control circuit, so that the control circuit has multiple power levels. For example, the control circuit has 4 power levels, and the 4 power levels may include high power, relatively high power, medium power and low power. When the distance between the transmitting light source and the receiver is far, the control circuit can set the power of the transmitting light source to high power or relatively high power; when the distance between the transmitting light source and the receiver is moderate, the power of the transmitting light source can be set to medium power or low power, thereby reducing the transmitting power, saving power consumption and extending the use time. For example, the power of the transmitting light source can be determined according to the distance between the transmitting light source and the receiver, and the 4 power levels correspond to 4 gear resistors respectively, with high power corresponding to gear resistor L0, relatively high power corresponding to gear resistor L1, medium power corresponding to gear resistor L2, and low power corresponding to gear resistor L3. For example, if the distance between the transmitting light source and the receiver is 30 mm, the power of the transmitting light source can be set to high power or relatively high power; if the distance between the transmitting light source and the receiver is 25 mm, the power of the transmitting light source can be set to medium power or low power.

[0047] The user inputs a power selection signal to the host computer. For example, if the user selects high power, the user inputs a high-power power selection signal to the host computer; the host computer sends the power selection signal to the main control chip, and the main control chip sends the power selection signal to the second MUX. The second MUX generates a gear selection signal according to the power selection signal. For example, if the power selection signal is a high-power selection signal, the gear selection signal can be 1000. At this time, the gear selection signal 1000 corresponds to the gear resistor L0, and the second MUX is electrically connected to the third MUX through the gear resistor L0. The power control current flows to the third MUX through the gear resistor L0, so that the second MUX can output the power control signal to the third MUX through the gear resistor L0; for another example, if the power selection signal is a higher-power selection signal, the gear selection signal can be 0100. At this time, the gear selection signal 1000 corresponds to the gear resistor L1, and the second MUX is electrically connected to the third MUX through the gear resistor L1. The power control current flows to the third MUX through the gear resistor L1, so that the second MUX can output the power control signal to the third MUX through the gear resistor L0. For example, if the power selection signal is a medium power selection signal, the gear selection signal can be 0010. At this time, the gear selection signal 0010 corresponds to the gear resistor L2, the second MUX is electrically connected to the third MUX through the gear resistor L2, and the power control current flows to the third MUX through the gear resistor L2, so that the second MUX can output the power control signal through the gear resistor L2; for example, if the power selection signal is a low power selection signal, the gear selection signal can be 0001. At this time, the gear selection signal 0001 corresponds to the gear resistor L3, the second MUX is electrically connected to the third MUX through the gear resistor L3, and the power control current flows to the third MUX through the gear resistor L3, so that the second MUX can output the power control signal through the gear resistor L3. Due to the different resistance values ​​of different gear resistors, the magnitude of the control current flowing through different gear resistors is different, so that the magnitude of the power control signal sent by the second MUX to the third MUX is also different, so that the second MUX can control the switching of different powers through the user's selection on the host computer.

[0048] The third MUX is used to output a power control signal to multiple emitting light sources a, and the power control signal can be used to control the power of multiple emitting light sources a. The main control chip outputs a first lighting signal to the third MUX, and the third MUX outputs a first lighting control signal to the corresponding emitting light source a according to the first lighting signal; the main control chip outputs a second lighting signal to the fourth MUX, and the fourth MUX outputs a second lighting control signal to the corresponding emitting light source a according to the second lighting signal. Each emitting light source a includes a red light source and an infrared light source, and the red light source and the infrared light source of each emitting light source a are lit in sequence according to the first lighting control signal and the second lighting control signal.

[0049] Figure 6 A schematic diagram of lighting up a light source provided in an embodiment of the present application is shown in FIG. Figure 6 As shown, the third MUX includes a first switch K1, the fourth MUX includes a second switch K2, and the main control chip outputs a first lighting signal to the third MUX through pins A0 to A3 and outputs a second lighting signal to the fourth MUX through pins A0 to A3. In addition, the main control chip also outputs an enable signal to the pins EN of the third MUX and the fourth MUX to start the third MUX and the fourth MUX. The first switch K1 connects the infrared ray (IR) light source to the low voltage end under the control of the first lighting signal, for example, the low voltage end is the ground end, so that the first lighting control signal output by the third MUX to the infrared light source is a low level, at this time, the level of the infrared light source is pulled down, and the infrared light source is lit under the control of the low level; the second switch K2 connects the red light source to the high voltage end Vdd under the control of the second lighting signal, so that the second lighting control signal output by the fourth MUX to the red light source is a high level, at this time, the level of the red light source is pulled up, and the red light source is extinguished under the control of the high level. Then, the first switch K1 connects the red light source to the low voltage terminal under the control of the first lighting signal, so that the first lighting control signal output by the third MUX to the red light source is low level, at this time, the level of the red light source is pulled down, and the red light source is lit under the control of the low level; the second switch K2 connects the infrared light source to the high voltage terminal Vdd under the control of the second lighting signal, so that the second lighting control signal output by the fourth MUX to the infrared light source is high level, at this time, the level of the infrared light source is pulled up, and the infrared light source is extinguished under the control of the high level. It can be seen that when the infrared light source is lit, the level of the red light source is pulled up to ensure that the red light source is completely turned off; when the red light source is lit, the level of the infrared light source is pulled up to ensure that the infrared light source is completely turned off. Using the above method, the red light source and the infrared light source of each emitting light source a are lit in turn, and in the process of switching the light source, the level of the previous light source is pulled up, thereby preventing the previous light source from emitting light due to leakage current.

[0050] The third MUX controls the red light and infrared light of the transmitting light source to light up in sequence to send a first light signal to the detection area, and the receiver receives the second light signal reflected by the detection area and performs photoelectric conversion on the second light signal to generate a detection signal, wherein the detection signal is an electrical signal, and the electrical signal is a current signal. The first conversion module 22 can be a transimpedance amplifier, and the first conversion module 22 converts the current signal into a voltage signal, and outputs the voltage signal to the first MUX. The first MUX is used to select two analog voltage signals from a plurality of voltage signals, and output the two analog voltage signals to two second conversion modules respectively; the two second conversion modules are connected by a daisy chain, the second conversion module can be an ADC, one second conversion module is used to output the analog voltage signal to another second conversion module, and the other second conversion module is used to combine the two analog voltage signals into an analog output signal and perform analog-to-digital conversion on the analog output signal to generate an fNIRS signal, wherein the fNIRS signal is a digital signal; the second conversion module transmits the fNIRS signal to the main control chip through the SPI protocol, for example, the main control chip can be a microcontroller unit (MCU).

[0051] In an embodiment of the present application, the brain function imaging device can also realize an offline storage function. The brain function imaging device can also include a storage module, and the storage module is connected to the main control chip. The main control chip is also used to record the timestamp of the fNIRS signal, and send the fNIRS signal and the timestamp to the storage module; the storage module is used to store the fNIRS signal and the timestamp.

[0052] As an optional solution, the brain function imaging device can have an offline storage function collected simultaneously with the host computer. In this case, the brain function imaging device also includes a read-write interface, which is connected to the storage module, and the read-write interface is connected to the host computer through a connecting device. The read-write interface is used to read the fNIRS signal and timestamp from the storage module, and send the fNIRS signal and timestamp to the host computer through the connecting device, so that the host computer obtains the fNIRS signal and timestamp from the brain function imaging device. For example, the connecting device can be a USB data cable, and the read-write interface is a USB interface.

[0053] Specifically, when the host computer starts recording, the offline recording function of the brain function imaging device is turned on by default, and the user does not need to perform the offline recording function activation operation separately. The brain function imaging device can record offline data. After the recording of offline data is completed, the user can manually shut down the brain function imaging device. Among them, the offline data may include fNIRS signals and timestamps. Thereafter, if the host computer needs to obtain the stored offline data from the brain function imaging device, the user can connect the connecting device to the read-write interface. For example, if the connecting device is a USB cable, the user can insert the USB interface of the USB cable into the read-write interface. The host computer reads the fNIRS signal and timestamp from the storage module through the connecting device and the read-write interface. The host computer can obtain the fNIRS signals and timestamps of different brain function imaging devices, and then can perform time alignment of the fNIRS signals of different brain function imaging devices or the fNIRS signals of the same brain function imaging device based on the timestamp.

[0054] As another optional solution, the brain function imaging device can realize an offline storage function separated from the host computer. The main control chip is also used to receive an opening instruction input by the user, and execute the step of recording the timestamp of the fNIRS signal in response to the opening instruction.

[0055] Disconnection from the host computer means that the host computer and the brain function imaging device are not in communication connection. In this case, there is no wired communication connection and no wireless communication connection between the host computer and the brain function imaging device. For example, the user presses the power key of the brain function imaging device twice in succession to input a power-on instruction to the brain function imaging device. At this time, the Bluetooth indicator light corresponding to the power key turns green and flashes, indicating that offline data collection has started. The main control chip responds to the power-on instruction, records the timestamp of the fNIRS signal, and sends the fNIRS signal and timestamp to the storage module; the storage module stores the fNIRS signal and timestamp.

[0056] In the technical solution provided in the embodiment of the present application, the brain function imaging device includes a sensor and a control circuit. The sensor includes multiple multi-channel interfaces. Different multi-channel interfaces form different detection components. Different detection components correspond to different detection areas of the user's brain. The control circuit sends a control signal to the detection component. The detection component collects the detection signal of the corresponding detection area in response to the control signal and outputs the detection signal to the control circuit. The control circuit generates an fNIRS signal according to the detection signal. In the embodiment of the present application, the brain function imaging device can form different detection components through different multi-channel interfaces, and detect the detection signals of different detection areas through different detection components. The layout of the detection components is flexible, and the signal acquisition method is flexible and diverse, thereby meeting the diverse needs of users.

[0057] In the embodiment of the present application, different detection components can detect detection signals in different detection areas, thereby improving the flexibility of multi-area signal monitoring.

[0058] In an embodiment of the present application, the main control chip sends a power selection signal to the second multiplexer, the second multiplexer generates a gear selection signal according to the power selection signal, outputs a power control signal to the third multiplexer through the gear resistor corresponding to the gear selection signal, and the third multiplexer outputs the power control signal to multiple emitting light sources, thereby realizing the control of the power of the emitting light source through the power control signal.

[0059] In the embodiment of the present application, by raising the level of the previous light source, it is ensured that when the current light source is lit, the previous light source is completely turned off, thereby preventing crosstalk, ensuring that only a single light source is lit, and preventing the previous light source from emitting light inadvertently due to leakage current.

[0060] In an embodiment of the present application, the brain function imaging device also includes a storage module, which is connected to the main control chip. The main control chip records the timestamp of the fNIRS signal and sends the fNIRS signal and the timestamp to the storage module. The storage module stores the fNIRS signal and the timestamp, thereby enabling the brain function imaging device to achieve offline data storage.

[0061] Fig. 7A A flowchart of a brain function imaging method provided in an embodiment of the present application, the method is applied to a brain function imaging device, the brain function imaging device includes: a sensor and a control circuit, the sensor includes a plurality of multi-channel interfaces, different multi-channel interfaces form different detection components, and different detection components correspond to different detection areas of the user's brain. Fig. 7A As shown, the method includes: Step 102: The control circuit sends a control signal to the detection component, so that the detection component collects a detection signal of the corresponding detection area in response to the control signal.

[0062] Step 104: The control circuit generates an fNIRS signal according to the detection signal output by the detection component.

[0063] As an optional solution, the multiple multi-channel interfaces include multiple light sources and multiple receivers, and each of the light sources corresponds to multiple receivers. The detection component responds to the control signal, collects the detection signal of the corresponding detection area, and outputs the detection signal to the control circuit, which may specifically include: the light sources are sequentially lit according to the control signal to send a first light signal to the detection area; the receiver receives the second light signal reflected by the detection area, and performs photoelectric conversion on the second light signal to generate a detection signal.

[0064] As an optional solution, the control signal includes a power control signal and a lighting control signal. Figure 7B A flow chart of a control signal processing method provided in an embodiment of the present application, such as Figure 7B As shown, step 102 may specifically include: Step 1022: The control circuit receives the power selection signal sent by the host computer, generates a power control signal according to the power selection signal, and sends the power control signal to the transmitting light source.

[0065] Step 1024: The control circuit receives the lighting signal sent by the host computer, generates a lighting control signal according to the lighting signal, and outputs the lighting control signal to the corresponding emitting light source.

[0066] As an alternative, Figure 7C A flowchart of a method for generating fNIRS signals provided in an embodiment of the present application is shown in FIG. Figure 7C As shown, step 104 may specifically include: Step 1042: The control circuit converts the detection signal into a voltage signal, and selects two analog voltage signals from the multiple voltage signals.

[0067] Specifically, Figure 4 As shown, the first conversion module converts the detection signal output by the corresponding receiver into a voltage signal, and outputs the voltage signal to the first multiplexer; the first multiplexer selects two analog voltage signals from multiple voltage signals, and outputs the two analog voltage signals to two second conversion modules respectively.

[0068] Step 1044: The control circuit combines the two analog voltage signals into an analog output signal and performs analog-to-digital conversion on the analog output signal to generate an fNIRS signal.

[0069] Specifically, Figure 4 As shown, a second conversion module is used to output the analog voltage signal to another second conversion module, and another second conversion module is used to combine two analog voltage signals into an analog output signal and perform analog-to-digital conversion on the analog output signal to generate the fNIRS signal.

[0070] As an optional solution, the lighting signal includes a first lighting signal and a second lighting signal, and the lighting control signal includes a first lighting control signal and a second lighting control signal.

[0071] In step 1022, a power control signal is generated according to the power selection signal and the power control signal is sent to the emitting light source, which may specifically include: generating a gear selection signal according to the power selection signal, generating a power control signal according to the gear selection signal, and outputting the power control signal to the multiple emitting light sources, wherein the power control signal is used to control the power of the multiple emitting light sources.

[0072] In step 1024, a lighting control signal is generated according to the lighting signal and the lighting control signal is output to the corresponding emitting light source, which may specifically include: outputting the first lighting control signal to the corresponding emitting light source according to the first lighting signal; outputting the second lighting control signal to the corresponding emitting light source according to the second lighting signal.

[0073] In the technical solution provided in the embodiment of the present application, the brain function imaging device includes a sensor and a control circuit. The sensor includes multiple multi-channel interfaces. Different multi-channel interfaces form different detection components. Different detection components correspond to different detection areas of the user's brain. The control circuit sends a control signal to the detection component. The detection component collects the detection signal of the corresponding detection area in response to the control signal and outputs the detection signal to the control circuit. The control circuit generates an fNIRS signal according to the detection signal. In the embodiment of the present application, the brain function imaging device can form different detection components through different multi-channel interfaces, and detect the detection signals of different detection areas through different detection components. The layout of the detection components is flexible, and the signal acquisition method is flexible and diverse, thereby meeting the diverse needs of users.

[0074] An embodiment of the present application provides a computer-readable storage medium, which includes a stored program, wherein when the program is run, the edge computing device where the storage medium is located is controlled to execute the embodiment of the above-mentioned brain function imaging method.

[0075] An embodiment of the present application provides an edge computing device, comprising: one or more processors; a memory; and one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the edge computing device, enable the edge computing device to perform the above-mentioned brain function imaging method.

[0076] Figure 8 A schematic diagram of the structure of an edge computing device provided in an embodiment of the present application is shown in FIG. Figure 8 As shown, the edge computing device 20 includes: a processor 21, a memory 22, and a computer program 23 stored in the memory 22 and executable on the processor 21. When the computer program 23 is executed by the processor 21, the method for brain function imaging in the embodiment is implemented. To avoid repetition, they are not described one by one here.

[0077] The edge computing device 20 includes, but is not limited to, a processor 21 and a memory 22. Those skilled in the art will appreciate that Figure 8 This is only an example of the edge computing device 20 and does not constitute a limitation of the edge computing device 20. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the edge computing device may also include input and output devices, network access devices, buses, etc.

[0078] The processor 21 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0079] The memory 22 may be an internal storage unit of the edge computing device 20, such as a hard disk or memory of the edge computing device 20. The memory 22 may also be an external storage device of the edge computing device 20, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the edge computing device 20. Furthermore, the memory 22 may also include both an internal storage unit of the edge computing device 20 and an external storage device. The memory 22 is used to store computer programs and other programs and data required by the edge computing device 20. The memory 22 may also be used to temporarily store data that has been output or is to be output.

[0080] Fig. 9 A schematic diagram of the structure of another edge computing device provided in an embodiment of the present application, such as Fig. 9 As shown, in Figure 8 Based on the embodiment shown, the edge computing device 20 may further include a brain function imaging device 24, which is connected to the processor 21. The brain function imaging device 24 may be a Figures 1 to 6 The brain functional imaging equipment shown will not be described in detail here.

[0081] As an alternative, the edge computing device 20 may include a head-mounted wearable device.

[0082] As another optional solution, the edge computing device 20 may also include but is not limited to mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. The edge computing device 20 shown is only an example and should not impose any limitations on the functions and occupancy range of the embodiments of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here.

[0083] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0084] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0085] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0086] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform some steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0087] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A brain function imaging device, characterized in that: include: A sensor and control circuit, wherein the sensor includes a plurality of multi-channel interfaces, different multi-channel interfaces form different detection components, and different detection components correspond to different detection areas of the user's brain; The control circuit is used to send a control signal to the detection component; The detection component is used to collect a detection signal of a corresponding detection area in response to the control signal, and output the detection signal to the control circuit; The control circuit is further configured to generate an fNIRS signal according to the detection signal.

2. The device according to claim 1, characterized in that The plurality of multi-channel interfaces include a first multi-channel interface, a second multi-channel interface, a third multi-channel interface and a fourth multi-channel interface; If the first multi-channel interface forms a detection component, the detection area corresponding to the detection component includes the frontal lobe area; or, If the second multi-channel interface forms a detection component, the detection area corresponding to the detection component includes the occipital lobe area; or, If the third multi-channel interface and the fourth channel interface form a detection component, the detection area corresponding to the detection component includes the parietal lobe area; or, If the first multi-channel interface, the third multi-channel interface and the fourth multi-channel interface form a detection component, the detection area corresponding to the detection component includes the parietal lobe area and the frontal lobe area; or, If the second multi-channel interface, the third multi-channel interface and the fourth multi-channel interface form a detection component, the detection area corresponding to the detection component includes the parietal lobe area and the occipital lobe area; or, If the first multi-channel interface, the second multi-channel interface, the third multi-channel interface and the fourth multi-channel interface form a detection component, the detection area corresponding to the detection component includes a frontal lobe area, a parietal lobe area and an occipital lobe area.

3. The device according to claim 2, characterized in that The first multi-channel interface includes a 16-channel interface, the second multi-channel interface includes a 16-channel interface, the third multi-channel interface includes a 12-channel interface, and the fourth multi-channel interface includes a 12-channel interface.

4. The device according to claim 1, characterized in that The multi-channel interface comprises a plurality of emitting light sources and a plurality of receivers, each of the emitting light sources corresponds to a plurality of the receivers; The emitting light source is used to light up in sequence according to the control signal to send a first light signal to the detection area; The receiver is used to receive the second optical signal reflected by the detection area, and perform photoelectric conversion on the second optical signal to generate the detection signal.

5. The device according to claim 4, characterized in that The control signal includes a power control signal and a lighting control signal, and the control circuit includes: a main control chip, a signal processing module and a control module, the signal processing module is connected between the multi-channel interface and the main control chip, and the control module is connected between the main control chip and the multi-channel interface; The signal processing module is used to receive the detection signal collected by the detection component and generate the fNIRS signal according to the detection signal; The main control chip is used to receive the fNIRS signal transmitted by the signal processing module; The control module is used to receive a power selection signal sent by the host computer, generate a power control signal according to the power selection signal and send the power control signal to the emitting light source; receive a lighting signal sent by the host computer, generate the lighting control signal according to the lighting signal and output the lighting control signal to the corresponding emitting light source.

6. The device according to claim 5, characterized in that The signal processing module includes a first multiplexer, a first conversion module corresponding to each of the receivers, and two second conversion modules, each first conversion module is connected to the corresponding receiver, and the first conversion module is connected to the first multiplexer, and the two second conversion modules are connected between the first multiplexer and the main control chip and are connected to each other; The first conversion module is used to convert the detection signal output by the corresponding receiver into a voltage signal, and output the voltage signal to the first multiplexer; The first multiplexer is used to select two analog voltage signals from the multiple voltage signals, and output the two analog voltage signals to the two second conversion modules respectively; A second conversion module is used to output the analog voltage signal to another second conversion module, and another second conversion module is used to combine two analog voltage signals into an analog output signal and perform analog-to-digital conversion on the analog output signal to generate the fNIRS signal.

7. The device according to claim 5, characterized in that The lighting signal includes a first lighting signal and a second lighting signal, and the lighting control signal includes a first lighting control signal and a second lighting control signal; the control module includes: a second multiplexer, a plurality of gear resistors, a third multiplexer and a fourth multiplexer, the second multiplexer is connected between the main control chip and the plurality of gear resistors, the third multiplexer is connected between the plurality of gear resistors and the plurality of emitting light sources, and the fourth multiplexer is connected between the main control chip and the plurality of emitting light sources; The main control chip is used to send a power selection signal to the second multiplexer; The second multiplexer is used to generate a gear selection signal according to the power selection signal, and output a power control signal to the third multiplexer through a gear resistor corresponding to the gear selection signal; The third multiplexer is used to output the power control signal to the multiple emitting light sources, and the power control signal is used to control the power of the multiple emitting light sources; The third multiplexer is used to output the first lighting control signal to the corresponding emitting light source according to the first lighting signal output by the main control chip; The fourth multiplexer is used to output the second lighting control signal to the corresponding emitting light source according to the second lighting signal output by the main control chip.

8. The device according to claim 5, characterized in that The device further comprises a storage module, wherein the storage module is connected to the main control chip; The main control chip is also used to record the timestamp of the fNIRS signal and send the fNIRS signal and the timestamp to the storage module; The storage module is used to store the fNIRS signal and timestamp.

9. The device according to claim 8, characterized in that The device also includes a read-write interface, the read-write interface is connected to the storage module, and the read-write interface is connected to the host computer through a connecting device; The read / write interface is used to read the fNIRS signal and the timestamp from the storage module, and send the fNIRS signal and the timestamp to the host computer through the connection device; and / or, The main control chip is also used to receive an opening instruction input by a user, and execute the step of recording the timestamp of the fNIRS signal in response to the opening instruction, and sending the fNIRS signal and the timestamp to the storage module.

10. A method for brain function imaging, characterized in that: The method is applied to a brain function imaging device, the brain function imaging device comprising: a sensor and a control circuit, the sensor comprising a plurality of multi-channel interfaces, different multi-channel interfaces forming different detection components, and different detection components corresponding to different detection areas of the user's brain; The method comprises: The control circuit sends a control signal to the detection component, so that the detection component collects a detection signal of a corresponding detection area in response to the control signal; The control circuit generates an fNIRS signal according to the detection signal output by the detection component.

11. The method according to claim 10, characterized in that The plurality of multi-channel interfaces include a plurality of emitting light sources and a plurality of receivers, each of the emitting light sources corresponds to a plurality of the receivers, and the control signal includes a power control signal and a lighting control signal; The control circuit sends a control signal to the detection component, including: The control circuit receives a power selection signal sent by the host computer, generates a power control signal according to the power selection signal, and sends the power control signal to the transmitting light source; The control circuit receives a lighting signal sent by a host computer, generates the lighting control signal according to the lighting signal, and outputs the lighting control signal to a corresponding emitting light source.

12. The method according to claim 11, characterized in that The control circuit generates an fNIRS signal according to the detection signal output by the detection component, including: Convert the detection signal into a voltage signal, and select two analog voltage signals from a plurality of voltage signals; The two analog voltage signals are combined into an analog output signal and the analog output signal is subjected to analog-to-digital conversion to generate the fNIRS signal.

13. The method according to claim 11, characterized in that The lighting signal includes a first lighting signal and a second lighting signal, and the lighting control signal includes a first lighting control signal and a second lighting control signal; The control circuit generates a power control signal according to the power selection signal and sends the power control signal to the detection component, including: Generate a gear selection signal according to the power selection signal, generate a power control signal according to the gear selection signal, and output the power control signal to the multiple emitting light sources, wherein the power control signal is used to control the power of the multiple emitting light sources; The control circuit generates the lighting control signal according to the lighting signal and outputs the lighting control signal to the detection component, including: Outputting the first lighting control signal to the corresponding emitting light source according to the first lighting signal; The second lighting control signal is output to the corresponding emitting light source according to the second lighting signal.

14. An edge computing device, characterized in that: include: one or more processors; Memory; And one or more computer programs, wherein the one or more computer programs are stored in the memory, and the one or more computer programs include instructions, which, when executed by the edge computing device, enable the edge computing device to perform the brain functional imaging method described in any one of claims 10 to 13.

15. The edge computing device according to claim 14, characterized in that: The edge computing device also includes: a brain function imaging device as described in any one of claims 1 to 9.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes a stored program, wherein when the program is executed, the edge computing device where the computer-readable storage medium is located is controlled to execute the brain function imaging method according to any one of claims 10 to 13.

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