Wearable near-infrared cerebral blood oxygen detection device and system and control method

Abstract

The invention provides a wearable near-infrared cerebral blood oxygen detection device and system and a control method, and belongs to the technical field of cerebral blood oxygen detection. The wearable near-infrared cerebral blood oxygen detection device comprises a detection main body part, the detection main body part comprises a U-shaped support, a plurality of light source emitting probes and a plurality of photoelectric detectors, the light source emitting probes and the photoelectric detectors are installed on the inner ring face of the U-shaped support, and every two light source emitting probes and every two photoelectric detectors are arranged in a staggered mode; each photoelectric detector is used for receiving an optical signal emitted by the light source emission probe which is separated from the photoelectric detector or the light source emission probe; and the driving unit is connected with the U-shaped bracket and is used for driving the detection main body part to rotate around a horizontal axis so as to sequentially carry out blood oxygen detection in the front-back direction of the head. According to the wearable near-infrared cerebral blood oxygen detection device, the sampling density and the spatial resolution can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of cerebral blood oxygen detection, and particularly relates to a wearable near-infrared cerebral blood oxygen detection device, system and control method. Background Art

[0002] Existing head near-infrared cerebral blood oxygen detection devices generally adopt a fixed-point detection method, that is, each probe is fixedly arranged and only detects a fixed position. When it is necessary to expand the detection range, the number of probes needs to be increased accordingly. For example, by setting a headgear covering the head detection area and arranging a plurality of probes on the headgear.

[0003] In order to better detect the blood oxygen information of the subcortical tissue of the head and reflect the changes in deep blood oxygen concentration and neural activity, the distance between the light source probe and the detector probe is 2 - 4 cm. When the distance between the light source probe and the detector probe is 3 cm, the formed sampling channel distance is 3 cm, resulting in a low sampling density; if the distance is further increased, the blood oxygen signal of the test channel between the light source and the detector will be weak.

[0004] Therefore, when the existing fixed-point head near-infrared cerebral blood oxygen detection device performs blood oxygen detection, the distance between each head detection point formed by the corresponding light source probe and detector probe is also 3 cm, and high-density detection cannot be achieved, that is, the existing detection device has the problems of low sampling density and low spatial resolution. Summary of the Invention

[0005] An object of the first aspect of the present invention is to provide a wearable near-infrared cerebral blood oxygen detection device to improve the sampling density and spatial resolution.

[0006] A further object of the present invention is to improve the wearing comfort.

[0007] An object of the second aspect of the present invention is to provide a detection system including the above-mentioned wearable near-infrared cerebral blood oxygen detection device.

[0008] An object of the third aspect of the present invention is to provide a control method for the above-mentioned wearable near-infrared cerebral blood oxygen detection device.

[0009] An embodiment of the present invention provides a wearable near-infrared cerebral blood oxygen detection device, including:

[0010] A detection main body part, including a U-shaped bracket, and a plurality of light source emission probes and a plurality of photodetectors both installed on the inner ring surface of the U-shaped bracket. Every two of the light source emission probes and every two of the photodetectors are arranged alternately, wherein each photodetector is used to receive the optical signal emitted by the light source emission probe that is spaced from it by one photodetector or one light source emission probe.

[0011] The driving unit is connected to the U-shaped bracket and is used to drive the detection body to rotate around the horizontal axis to perform blood oxygen detection in sequence in the front-to-back direction of the head.

[0012] Optionally, the axes of all the light source emitting probes and the axes of all the photoelectric detectors are located in the same plane.

[0013] Optionally, a hair-pushing structure is provided at the rear end of each of the light source emitting probes and each of the photoelectric detectors for pushing aside hair when the U-shaped bracket rotates backward.

[0014] Optionally, the wearable near-infrared cerebral blood oximetry detection device also includes a shell for accommodating the driving unit, the driving unit includes a motor and a transmission mechanism, both of which are arranged in the shell, the transmission mechanism includes an output shaft, the output shaft and the U-shaped bracket are arranged to rotate synchronously, and the driving shaft of the motor is arranged vertically.

[0015] Optionally, the number of the shells is two, which are respectively located at the two bottom ends of the U-shaped bracket, and the two shells are also used to accommodate the control chip of the motor, the light source emission probe and the photodetector.

[0016] Optionally, the bottom of the shell is supported on the fixing component through a bracket.

[0017] Optionally, the top of the shell is also connected to the U-shaped bracket through a drawstring.

[0018] Optionally, the wearable near-infrared cerebral blood oxygen detection device further includes a front strap and a rear strap both connected to the U-shaped bracket, and the front strap and the rear strap are respectively mounted on the chin and the back of the head.

[0019] In particular, the present invention also provides a cerebral blood oximetry detection system, comprising a host computer and any of the wearable near-infrared cerebral blood oximetry detection devices described above, wherein the host computer is used to receive collected data from the wearable near-infrared cerebral blood oximetry detection device.

[0020] In particular, the present invention also provides a control method for the wearable near-infrared cerebral oximetry device, comprising:

[0021] Controlling each probe group to be installed and set in sequence at the initial position so that each probe group emits optical signals of 735nm and 850nm in sequence when working. The probe group includes at least one light source emitting probe, and all the light source emitting probes in the same probe group synchronously emit optical signals of the same wavelength;

[0022] Activating the driving unit to drive the detection body to rotate a preset angle;

[0023] After rotating the preset angle, controlling each of the probe groups to work in sequence according to the set timing;

[0024] The driving unit and the probe groups are controlled to continue working until the target detection range is covered.

[0025] The two light source emitting probes and each two photodetectors of the present invention are arranged in an interlaced manner. The light signal of each light source emitting probe can be received by two photodetectors. Under the premise of ensuring the appropriate spacing between the light source emitting probes and the photodetectors, the spacing between the detection channels is reduced, so that the spacing can be reduced to 1.5 cm. That is, the detection density is effectively improved through a special layout method, and high-density sampling in the horizontal direction of the head is achieved. Furthermore, the entire detection body can rotate around the horizontal axis under the drive unit, thereby achieving high-density sampling in the longitudinal direction of the head, and overall achieving high spatial resolution.

[0026] Furthermore, by arranging the motor vertically and providing a corresponding transmission mechanism, deceleration and a change in the direction of the rotation axis can be achieved. This motor arrangement can make the center of gravity of the entire wearable near-infrared cerebral blood oxygen detection device closer to the center, which is conducive to achieving the stability of the entire structure after being worn on the head.

[0027] Furthermore, the shell is fixedly supported on the fixed component by a bracket, which can transmit the vibration of the motor to the outside on the one hand, and on the other hand does not require the human body to bear the weight of the drive unit, thereby improving the wearing comfort of the human body and improving the rotational stability of the detection body.

[0028] Furthermore, by arranging a hair-moving structure on each light source emitting probe and photoelectric detector, the hair at the corresponding position can be moved away when the detection body rotates, avoiding the light being blocked by the hair during detection, and eliminating the need for manual hair-moving, thereby effectively improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a front view of a wearable near-infrared cerebral blood oxygen detection device according to one embodiment of the present invention;

[0030] Figure 2 for Figure 1 Detection principle diagram of wearable near-infrared cerebral blood oxygen detection device;

[0031] Figure 3 for Figure 1 Schematic diagram of angle adjustment of wearable near-infrared cerebral blood oxygen detection device;

[0032] Figure 4Schematic exploded view of a wearable near-infrared brain blood oxygen detection device according to an embodiment of the present invention;

[0033] Figure 5 Schematic principle diagram of a driving unit of a wearable near-infrared brain blood oxygen detection device according to an embodiment of the present invention;

[0034] Figure 6 Schematic structural diagram of a photodetector of a wearable near-infrared brain blood oxygen detection device according to an embodiment of the present invention;

[0035] Figure 7 Flowchart of a control method according to an embodiment of the present invention;

[0036] Reference numerals:

[0037] 100 - Wearable near-infrared brain blood oxygen detection device, 10 - Detection main body part, 101 - Dialing structure, 11 - U-shaped bracket, 111 - Second mounting hole 111, 112 - Second through hole, 12 - Light source emission probe, 13 - Photodetector, 20 - Housing, 211 - First mounting hole, 212 - First through hole, 213 - Opening, 22 - Motor, 221 - Driving shaft, 23 - Transmission mechanism, 231 - First gear, 232 - Second gear, 233 - Third gear, 234 - Output shaft, 30 - Pulling rope, 40 - Front strap, 50 - Rear strap. Detailed implementation manners

[0038] In order to make the above-mentioned objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0039] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of the present application are only for the purpose of illustration and do not represent the only implementation manner.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0042] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0043] Figure 1 It is a front view of a wearable near-infrared cerebral blood oxygen detection device 100 according to an embodiment of the present invention. Figure 2 It is Figure 1 the detection principle diagram of the wearable near-infrared cerebral blood oxygen detection device 100 in Figure 3 It is Figure 1 the schematic diagram of the angle adjustment of the wearable near-infrared cerebral blood oxygen detection device 100 in Figure 1 As shown, in one embodiment, the wearable near-infrared cerebral blood oxygen detection device 100 includes a detection main body part 10 and a driving unit. The detection main body part 10 includes a U-shaped bracket 11 and a plurality of light source emission probes 12 and a plurality of photodetectors 13 that are all installed on the inner ring surface of the U-shaped bracket 11. As Figure 2 shown, Figure 2 the dashed line in Figure 2A detection channel CH1 is formed between the light source emission probe S2 and the photodetector D1, a detection channel CH2 is formed between the light source emission probe S1 and the photodetector D2, a detection channel CH3 is formed between the light source emission probe S2 and the photodetector D3, and a detection channel CH4 is formed between the light source emission probe S3 and the photodetector D2. The principles of the detection channels in other parts are similar and will not be elaborated here. In this layout, when the distance between the light source emission probe 12 and its corresponding photodetector 13 is not less than 3 cm, the distance d between two adjacent probes (two adjacent light source emission probes 12, two adjacent photodetectors 13, or an adjacent light source emission probe 12 and photodetector 13) can be set to not less than 1.5 cm, so that the distance between the detection channels is 1.5 cm. As Figure 3 shown, the driving unit is connected to the U-shaped bracket 11 and is used to drive the detection main body 10 to rotate around the horizontal axis for sequentially performing blood oxygen detection in the front-back direction of the head. In this embodiment, the axes of all the light source emission probes 12 and the axes of all the photodetectors 13 are located in the same plane. In other embodiments, the light source emission probes 12 and the photodetectors 13 can also be arranged staggeredly in the width direction of the U-shaped bracket, that is, staggeredly arranged in the front-back direction of the head, so as to further reduce the distance between the detection points on the head.

[0044] In this embodiment, every two light source emission probes 12 and every two photodetectors 13 are arranged staggeredly, and the optical signal of each light source emission probe 12 can be received by two photodetectors 13. On the premise of ensuring a suitable distance between the light source emission probe 12 and the photodetector 13, the distance between the detection channels is reduced, and the distance can be reduced to 1.5 cm. That is, through a special layout, the detection density is effectively increased, and high-density sampling in the horizontal direction of the head (i.e., Figure 1 the direction a in) is realized. Further, the entire detection main body 10 can rotate around the horizontal axis driven by the driving unit, so high-density sampling in the longitudinal direction of the head (i.e., Figure 3 the direction b in) can be realized, and high resolution in space is achieved.

[0045] Figure 4 FIG. 13 is an exploded structural schematic diagram of a wearable near-infrared cerebral blood oxygen detection device 100 according to an embodiment of the present invention. Figure 5 FIG. 14 is a schematic diagram of the principle of the driving unit of the wearable near-infrared cerebral blood oxygen detection device 100 according to an embodiment of the present invention. In one embodiment, as Figure 1 shown, the wearable near-infrared cerebral blood oxygen detection device 100 includes two housings 20, which are respectively located at the two bottom ends of the U-shaped bracket 11. The driving unit includes a motor 22 and a transmission mechanism 23 (see Figure 5) The motor 22 and the traditional mechanism 23 are both arranged within a housing 20. The transmission mechanism 23 includes an output shaft 234, and the output shaft 234 is set to rotate synchronously with the U-shaped bracket 11, that is, there is at least no relative rotation between the U-shaped bracket 11 and the output shaft. For example, the synchronous rotation connection is achieved through common structures such as splines and pin shafts. In this embodiment, the drive shaft of the motor 22 is arranged vertically. The transmission mechanism includes a first gear 231 adjacent to the motor shaft, a second gear 232 meshing with the first gear 231, a third gear 233 meshing with the second gear 232, and the third gear 233 is connected to the output shaft. Both the first gear 231 and the second gear 232 are spur gears, and the third gear 233 is a bevel gear, thereby achieving the deceleration of the motor 22 and the drive of the U-shaped bracket 11. Of course, in other embodiments not shown, the transmission mechanism can also be other common deceleration mechanisms, and the arrangement direction of the motor 22 can also be other, which is not limited herein. The housing 20 for accommodating the drive unit also houses the control chip of the motor 22. Another housing 20 is used to accommodate the control chips of the light source emission probe 12 and the photodetector 13, so that the two housings 20 and the weights therein are as similar as possible. If not, a counterweight can be provided. Of course, in other embodiments not shown, the number of drive units can also be 2, which are respectively located in two housings 20. The above control chips can be reasonably arranged according to the weight situation, which is not limited herein.

[0046] In this embodiment, by arranging the motor 22 vertically and setting the corresponding transmission mechanism 23, deceleration and the change of the rotation axis direction can be achieved. This arrangement of the motor 22 can make the center of gravity of the entire wearable near-infrared cerebral blood oxygen detection device 100 closer to the center, which is beneficial to the stability of the entire structure when worn on the head.

[0047] As Figure 4 shown, on one side of the housing 20 facing the U-shaped bracket 11, there are a first mounting hole 211 and a first through hole 212, which are respectively used for mounting the bearing of the output shaft 234 and passing through the wire harnesses of each light source emission probe 12 and each photodetector 13. Correspondingly, at the U-shaped bracket 11, there are also a second mounting hole 111 and a second through hole 112, which are respectively used for mounting the output shaft and passing through the above wire harnesses. The control chips of the light source emission probe 12 and the photodetector 13, and the control chip of the motor 22 can all be arranged within the housing 20. It should be noted that the structures of the two side housings 20 should have as similar weights as possible to achieve gravity balance.

[0048] In one embodiment, the bottom of the housing 20 is supported at a fixed part through a bracket (not shown). Here, the fixed part can be a stable support surface such as a tabletop or the ground. The top of the housing 20 is also connected to the U-shaped bracket 11 through a pull rope 30. Here, the bracket can be vertically telescopic, such as Figure 4As shown, the housing 20 of the drive unit is provided with two openings on one side and the top surface close to the U-shaped bracket 11, for passing the pull rope 30. The other end of the pull rope 30 can be fixed to the U-shaped bracket 11. The number of the pull rope 30 can be multiple and fixed at different heights of the U-shaped bracket 11, such as Figure 1 In the embodiment shown, the pull cord 30 has two suspension levels.

[0049] The shell 20 of this embodiment is fixedly supported on the fixed component by a bracket. On the one hand, it can transmit the vibration of the motor 22 to the outside, and on the other hand, the human body does not need to bear the weight of the drive unit, thereby improving the wearing comfort of the human body and improving the rotation stability of the detection body 10.

[0050] Furthermore, the housing 20 and the U-shaped bracket 11 are connected by the pull rope 30, which can further ensure the stability of the drive unit.

[0051] In a further embodiment, Figure 3 As shown, the wearable near-infrared cerebral blood oxygen detection device 100 also includes a front strap 40 and a rear strap 50 both connected to the U-shaped bracket 11. The front strap 40 and the rear strap 50 are respectively arranged on the chin and the back of the head to stably fix the detection body 10 on the head.

[0052] Figure 6 1 is a schematic structural diagram of the photodetector 13 of the wearable near-infrared cerebral blood oxygen detection device 100 according to an embodiment of the present invention. Figure 6 It can also be seen as a structural diagram of the light source emitting probe 12, and the two are similar or identical in appearance. In one embodiment, the rear end of each light source emitting probe 12 and each photodetector 13 is provided with a hair-pushing structure 101 for pushing away hair when the U-shaped bracket 11 rotates backward. Figure 6 As shown, the trigger structure 101 can be in a shape that gradually shrinks in the direction away from the photodetector 13 , such as a tetrahedron, a cone, etc. The tip of the trigger structure 101 points in the same direction as the movement direction of the detection body 10 .

[0053] This embodiment provides a hair-moving structure 101 on each light source emitting probe 12 and photodetector 13, which can move the hair at the corresponding position when the detection body 10 rotates, avoiding the light being blocked by the hair during detection, eliminating the need for manual hair moving, and effectively improving the detection accuracy.

[0054] An embodiment of the present application further provides a cerebral blood oxygen detection system, including a host computer and the wearable near-infrared cerebral blood oxygen detection device 100 in any of the above embodiments. The host computer is used to receive the acquisition data of the wearable near-infrared cerebral blood oxygen detection device 100. The host computer can be connected to the wearable near-infrared cerebral blood oxygen detection device 100 in a wireless or wired manner and acquire data in an offline or online manner.

[0055] Figure 7 It is a flowchart of a control method according to an embodiment of the present invention. As Figure 7 shown, an embodiment of the present application further provides a control method for the wearable near-infrared cerebral blood oxygen detection device 100 in any of the above embodiments, including:

[0056] Step S100, controlling each probe group to work in sequence according to the installed setting timing. When each probe group works, it emits optical signals of 735 nm and 850 nm in sequence. The probe group includes at least one light source emission probe 12. All the light source emission probes 12 in the same probe group synchronously emit optical signals of the same wavelength;

[0057] Step S200, starting the driving unit to drive the detection main body 10 to rotate a preset angle;

[0058] Step S300, judging whether the angle of the detection main body 10 is a preset angle threshold. If so, end the process; otherwise, return to step S100.

[0059] In one embodiment, taking Figure 2 as an example, the setting timing and probe group in step S100 are shown in Table 1 below. For example, in the first cycle, first control the probe group including S1 and S5 to simultaneously emit optical signals of 735 nm, and then synchronously emit optical signals of 850 nm. The signal received by D2 corresponding to S1 in this probe group, and the signals received by D4 and D6 corresponding to S5 in this probe group. The principles of other cycles are the same as those of the first cycle, and the detection positions cover all head detection points.

[0060] Table 1

[0061]

[0062] The size of the preset angle in step S200 determines the sampling density in the longitudinal direction of the head. By the cooperation of the motor 22 and the transmission mechanism, various sampling density settings can be realized. The angle threshold in step S300 is the angle value corresponding to the end of detection, which can be set in advance according to the detection range.

[0063] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A wearable near-infrared brain blood oxygen detection device, characterized in that, include: The detection body includes a U-shaped bracket, and a plurality of light source emitting probes and a plurality of photodetectors, all mounted on the inner annular surface of the U-shaped bracket, wherein every two light source emitting probes and every two photodetectors are arranged alternately, wherein each photodetector is used to receive the light signal emitted by the light source emitting probe that is separated from it by one photodetector or one light source emitting probe; The driving unit is connected to the U-shaped bracket and is used to drive the detection body to rotate around the horizontal axis to perform blood oxygen detection in sequence in the front-to-back direction of the head.

2. The wearable near-infrared brain blood oxygen detection device according to claim 1, wherein The axes of all the light source emitting probes and the axes of all the photoelectric detectors are located in the same plane.

3. The wearable near-infrared cerebral blood oxygen detection device according to claim 1, wherein, The rear ends of each of the light source emitting probes and each of the photoelectric detectors are provided with a hair-pushing structure for pushing away hair when the U-shaped bracket rotates backward.

4. The wearable near-infrared brain blood oxygen detection device according to claim 1, characterized in that It also includes a shell for accommodating the drive unit, the drive unit includes a motor and a transmission mechanism, both of which are arranged in the shell, the transmission mechanism includes an output shaft, the output shaft and the U-shaped bracket are arranged to rotate synchronously, and the drive shaft of the motor is arranged vertically.

5. The wearable near-infrared brain blood oxygen detection device according to claim 4, wherein The number of the shells is 2, which are respectively located at the two bottom ends of the U-shaped bracket. The two shells are also used to accommodate the control chip of the motor, the light source emission probe and the photodetector.

6. The wearable near-infrared cerebral blood oxygen detection device according to claim 4 or 5, characterized in that The bottom of the shell is supported on the fixing component through a bracket.

7. The wearable near-infrared cerebral blood oxygen detection device according to claim 6, wherein The top of the shell is also connected to the U-shaped bracket through a drawstring.

8. The wearable near-infrared cerebral blood oxygen detection device according to claim 7, characterized in that, It also includes a front strap and a rear strap both connected to the U-shaped bracket, and the front strap and the rear strap are respectively sleeved on the chin and the back of the head.

9. A cerebral blood oxygen detection system, characterized in that, The device comprises a host computer and the wearable near-infrared cerebral blood oximetry device according to any one of claims 1 to 8, wherein the host computer is used to receive collected data from the wearable near-infrared cerebral blood oximetry device.

10. A control method for the wearable near-infrared brain blood oxygen detection device according to any one of claims 1-8, characterized in that, include: Controlling each probe group to be installed and set in sequence at the initial position so that each probe group emits optical signals of 735nm and 850nm in sequence when working. The probe group includes at least one light source emitting probe, and all the light source emitting probes in the same probe group synchronously emit optical signals of the same wavelength; Activating the driving unit to drive the detection body to rotate a preset angle; After rotating the preset angle, controlling each of the probe groups to work in sequence according to the set timing; The driving unit and the probe groups are controlled to continue working until the target detection range is covered.

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