Eye fatigue detection device and use method

Abstract

The invention relates to an eye fatigue detection device and a use method. The eye fatigue detection device comprises a head-mounted device body and a double-infrared camera shooting assembly, and a double-infrared camera is arranged on the head-mounted device body through a suspension connecting frame and rotationally connected with the suspension connecting frame; the double-infrared camera shooting assembly is symmetrically provided with two infrared cameras; a control box is inserted into the support legs of the head-mounted device main body, and the control box is used for operating and sending a control instruction to the head-mounted device main body. According to the wearable eye fatigue detection device provided by the invention, the double infrared camera assemblies and the suspension connecting frame can be rotationally adjusted, and the adjustable angle reaches 90 degrees, so that the two infrared cameras can be better aligned with the left eye and the right eye of a testee; a user can simply and conveniently carry out various control on the head-mounted device main body and select different detection modes; detection data can be sent to a cloud service or other equipment through WIFI or a cellular network; and remote operation is realized by using a Bluetooth network.

Description

Technical Field

[0001] The present invention relates to the technical field of eye fatigue detection, and in particular to an eye fatigue detection device and a use method thereof. Background Art

[0002] Eye strain, also known as visual fatigue or screen timer syndrome, is a common discomfort symptom after prolonged use of electronic screens such as computers, tablets and smartphones. Taking an eye strain test can help people understand their eye health and take appropriate measures to relieve fatigue.

[0003] By collecting infrared image data of the eye and extracting pupil parameters, various parameters about the pupil can be obtained, such as pupil diameter, pupil fluctuation degree, pupil adaptation speed, etc. The change in pupil diameter may be related to the degree of visual fatigue, and a larger pupil diameter may indicate a higher level of visual fatigue. An increase in pupil fluctuation may be related to the degree of eye fatigue, while a slowdown in pupil adaptation speed may be related to visual fatigue caused by long-term use of electronic devices.

[0004] For example, a pupil data fatigue detection method based on infrared camera proposed in Chinese invention patent publication number CN117173776A obtains infrared image data of the eye of the test subject; uses an image processing algorithm to process the infrared image data of the eye to obtain pupil position data and edge data; obtains a pupil diameter position change data set and a pupil center position change data set within a T time period based on the pupil position data and edge data; compares the pupil diameter position change data set and the pupil center position change data set within the T time period with a fatigue severity visual analog scale to obtain pupil data fatigue detection results, which solves the problems of strong subjectivity, large limitations and low accuracy of detection results in traditional pupil detection methods.

[0005] However, the eye infrared camera of the above technical solution is an independent device and is placed in a fixed position, such as on a table. In addition, since there is a certain distance between the eye infrared camera and the subject's eyes, professional personnel are required to operate and debug to ensure that the infrared camera accurately captures eye image data.

[0006] It can be seen that there is a lack of an easy-to-operate eye fatigue detection device on the market that allows non-professional users to easily use it and perform eye fatigue detection at home.

[0007] The above problems are worth solving. Summary of the invention

[0008] In order to overcome the problems of the prior art, the present invention provides an eye fatigue detection device and a method of use, which provides a simple operation interface. Users can wear it by themselves and easily select different detection modes, adjust parameters, start / pause detection, etc. through a control box, and easily complete the detection.

[0009] The technical solution of the present invention is as follows:

[0010] An eye fatigue detection device, characterized in that it comprises a head-mounted device body and a dual infrared camera assembly, wherein the dual infrared cameras are arranged at the middle and lower part of the head-mounted device body through a suspension connection frame, and the dual infrared cameras are rotatably connected to the suspension connection frame; the dual infrared camera assembly is symmetrically provided with two infrared cameras, and the two infrared cameras correspond to the left and right eyes of the subject respectively;

[0011] The head mounted device body has a built-in working mainboard, the working mainboard integrates a processing chip, and the processing chip is used to receive data from the two infrared cameras;

[0012] A control box is plugged into one of the side legs of the head-mounted device body, and the control box is electrically connected to the head-mounted device body; the control box has a built-in control module, and the control box has a plurality of buttons, and the buttons are used to operate the control module to send control instructions.

[0013] According to the above-mentioned scheme of the present invention, the adjustable angle of the dual infrared camera assembly on the suspension connecting frame is 90°.

[0014] According to the present invention of the above scheme, the working mainboard is integrated with a WiFi module, a 4G / 5G module and a Bluetooth module. The WiFi module is used to upload the detection data to the cloud service through the WiFi network, the 4G / 5G module is used to provide a cellular network connection to transmit data, and the Bluetooth module is used to wirelessly connect to a smart mobile device with a Bluetooth signal.

[0015] According to the present invention of the above scheme, the head mounted device body is further provided with a TOF sensor, and the detection direction of the TOF sensor is toward the front of the head mounted device body.

[0016] According to the present invention of the above scheme, the dual infrared camera assembly is also symmetrically provided with two infrared fill light lamps, one infrared fill light corresponds to one infrared camera; the infrared fill light is electrically connected to the working mainboard.

[0017] According to the present invention of the above scheme, the control instructions include a power-on control instruction, a power-off control instruction, a start detection instruction, a pause / resume detection instruction, a parameter setting instruction and a mode selection instruction.

[0018] According to the above-mentioned solution of the present invention, the lower surface of the head-mounted device body is provided with photo sensors corresponding to the two infrared cameras respectively, and the photo sensors are used to detect the infrared light of the infrared cameras on the same side.

[0019] The present invention also provides a method for using the eye fatigue detection device, which is implemented by the eye fatigue detection device described in the above scheme, and includes the following steps:

[0020] Step 1: plug the control box into the head mounted device.

[0021] Step 2: Wear the head-mounted device and start it up through the control box;

[0022] Step 3: Adjust the angle of the dual infrared camera assembly;

[0023] Step 4: Select the required detection mode through the control box and wait for the detection to be completed;

[0024] Step 5: Send data to other devices via the control box.

[0025] According to the present invention of the above scheme, step 3 specifically includes: adjusting the angle of the dual infrared camera assembly until the photo sensor outputs a signal to complete the angle adjustment.

[0026] Furthermore, in step 3, the angle of the dual infrared camera assembly is adjusted by the forward rotation key and the reverse rotation key of the control box. When the sensing value of the light sensor is equal to the preset value, a signal is output and the dual infrared camera assembly stops rotating.

[0027] The present invention according to the above scheme has the following beneficial effects:

[0028] The present invention provides a wearable eye fatigue detection device, wherein a dual infrared camera assembly is arranged at the middle and lower part of a head-mounted device body through a suspension connection frame. When worn on the forehead of a subject, the suspension connection frame provides an angle for installing the dual infrared camera assembly without interfering with the field of vision.

[0029] The dual infrared camera assembly and the suspension connection frame can be rotated and adjusted to adjust the angle of the dual infrared camera assembly on the suspension connection frame. The adjustable angle can reach 90°, so that the two infrared cameras can better aim at the left and right eyes of the subject;

[0030] Furthermore, the head-mounted device body is also equipped with a control box, and the user can easily perform various controls on the head-mounted device body by operating the control box, including the selection of the detection mode, etc.;

[0031] Furthermore, the head-mounted device has built-in various types of networking modules, which can send detection data to cloud services or other devices using WIFI or cellular networks; and realize remote operation using Bluetooth networks. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a diagram of the use state of the device of the present invention;

[0033] Figure 2 It is a structural schematic diagram of the device of the present invention;

[0034] Figure 3 It is a partial schematic diagram of the back side of the device of the present invention;

[0035] Figure 4 It is a structural exploded view of the suspension connecting frame in the device of the present invention;

[0036] Figure 5 for Figure 4 A magnified view of part A;

[0037] Figure 6 It is a schematic diagram of the installation of the suspension connecting frame and the elastic nose pad;

[0038] Figure 7 It is an exploded view of the housing structure of the device of the present invention;

[0039] Figure 8 It is a flowchart of the method of the present invention.

[0040] In the figure,

[0041] 1. Head-mounted device body;

[0042] 11. Core functional part; 12. Support foot; 121. Ring; 13. TF card slot; 14. TOF sensor; 15. Elastic band; 16. Light sensor; 101. Functional part shell; 1011. Plate rib; 102. Support foot shell; 103. Left support foot back plate; 104. Middle back plate; 1041. Rubber pad; 105. Right support foot back plate;

[0043] 2. Suspension connecting frame;

[0044] 21. front housing of connecting frame; 22. back plate of connecting frame; 221. nose pad mounting groove; 23. rotating shaft; 231. first abutting surface; 232. second abutting surface; 233. rotating opening; 234. gap; 24. fastening bolt; 25. polygonal nut;

[0045] 3. Dual infrared camera components;

[0046] 31. Support rod; 32. Connecting rod; 321. Axle groove; 3211. Groove edge; 33. Infrared camera; 34. Infrared fill light;

[0047] 4. Elastic nose pads;

[0048] 41. Connecting and fixing part; 42. Strip hole; 43. Supporting nose bridge part;

[0049] 5. Control box. DETAILED DESCRIPTION

[0050] In order to better understand the purpose, technical scheme and technical effect of the present invention, the present invention is further explained in conjunction with the accompanying drawings and embodiments. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, it is stated that the embodiments described below are only used to explain the present invention and are not used to limit the present invention.

[0051] It should be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may also be a central element, and when an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time.

[0052] The indicated orientation or position relationship is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when used, or the orientation or position relationship commonly understood by technical personnel in this field, or the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0053] The terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0054] like Figure 1 and Figure 2 As shown, an eye fatigue detection device includes a head-mounted device body 1 and a dual infrared camera assembly 3, wherein the dual infrared cameras 33 are arranged at the lower middle of the head-mounted device body 1 through a suspension connecting frame 2, and the dual infrared cameras 33 are rotatably connected to the suspension connecting frame 2; the dual infrared camera assembly 3 is symmetrically provided with two infrared cameras 33, and the two infrared cameras 33 correspond to the left and right eyes of the subject respectively.

[0055] The head-mounted device body 1 can be detachably worn on the forehead of the subject, and the suspension connection frame 2 provides an angle for installing the dual infrared camera assembly 3 without interfering with the field of vision. Users can perform eye fatigue detection anytime and anywhere without relying on a specific environment or professional settings; after the device is worn, the suspension connection frame 2 places the two camera lenses of the dual infrared camera assembly 3 in front of the subject's eyes, and the distance is very close, so that the lens can be aligned with the eyes and detection can be started without complicated alignment and debugging processes, which greatly simplifies the operation process; because the dual infrared cameras 33 are fixed at a stable position below the eyes, and the eyes are photographed from bottom to top, the subject's field of vision in front will not be blocked, and daily activities can be continued during the use of this device.

[0056] The head-mounted device body 1 includes a core functional part 11 located in the middle and legs 12 located on both sides. The core functional part 11 has a built-in working mainboard, and the working mainboard integrates a processing chip. The processing chip is used to receive data from the two infrared cameras and perform data processing, data storage and data transmission on the pictures obtained by the infrared camera. Specifically, the size of the core functional part 11 is larger than the size of the legs 12 on both sides. The core functional part 11 has a larger accommodating chamber and a built-in working mainboard. The working mainboard integrates at least a processing chip, a memory, and a flash memory. The processing chip is used to process the data collected from the dual infrared camera components 3 and execute related computing tasks such as image processing algorithms; the memory is used to temporarily store running data and programs; the flash memory is used to store firmware parameters, configuration file parameters and preset parameters.

[0057] The core function unit 11 is also provided with a TF card slot 13, which is used to insert a TF card (i.e., a memory card) for storing detection data, images, and other related information. The TF card slot 13 supports hot plugging, which is convenient for users to replace or read data.

[0058] The working motherboard also integrates a WiFi module, a 4G / 5G module and a Bluetooth module. The WiFi module is used to upload the detection data to the cloud service via the WiFi network; the 4G / 5G module is used to provide cellular network connection so that data can be transmitted even without WiFi; the Bluetooth module is used for short-range wireless communication with smartphones or other mobile devices, which is convenient for real-time viewing of data or device settings.

[0059] The core function unit 11 is also provided with a TOF sensor 14. The detection direction of the TOF sensor 14 is in front of the head-mounted device body 1, that is, the direction of the wearer's vision, and is used to monitor the environment in front of the device, provide distance and depth information, and help the system better understand the user's position, thereby optimizing the working performance of the infrared camera component. For example, when the user lowers his head to read a book, the TOF sensor 14 detects that there is an obstacle approaching in front, and the system can trigger a pause detection and remind the user to raise his head to avoid false detection and obtain more accurate detection results.

[0060] A TYPE-C interface is provided at the end of one side leg 12 of the head-mounted device body 1, and a control box 5 is connected through the TYPE-C interface. The control box 5 not only provides a built-in rechargeable battery and has a power management function, but also allows the user to perform various controls on the head-mounted device body 1, including:

[0061] Power on control: start the head mounted device body 1 by operating the buttons on the control box 5 or the touch screen;

[0062] Power off control: turn off the head mounted device body 1 through the buttons on the control box 5 or the touch screen operation;

[0063] Start detection - start eye fatigue detection through the button on the control box 5 or the application interface;

[0064] Pause / Continue Testing - During the testing process, the user can choose to pause the test and continue when needed;

[0065] Parameter setting - adjust the detection parameters, such as detection time, data sampling frequency, etc.;

[0066] Mode selection - provides different detection modes, such as standard mode, rapid detection mode or long-term monitoring mode;

[0067] Among them, the standard detection mode is suitable for routine eye fatigue detection, and continuous detection is performed according to a preset time period (such as 5 minutes, 10 minutes, etc.). The indicators include average pupil diameter, pupil fluctuation degree, pupil adaptation speed, eye closure percentage, blinking parameters (blinking time and number); the rapid detection mode is suitable for rapid assessment of eye fatigue status in a short period of time, usually completed within 1-3 minutes, and mainly focuses on key indicators such as average pupil diameter, blinking frequency and eye closure percentage; the long-term monitoring mode is suitable for fatigue monitoring after long-term work or study, which lasts for several hours. All parameters are recorded in the long-term monitoring mode, and a report is generated at intervals.

[0068] The control functions provided by the control box 5 also include:

[0069] Data transmission - automatically upload detection data to cloud services via WiFi or cellular networks for remote access and backup; save data locally to TF card;

[0070] Data synchronization - Sync data to other devices such as smartphones via Bluetooth or TYPE-C.

[0071] In other optional embodiments, a USB interface is provided at the end of one side support leg 12 of the head-mounted device body 1, and data is synchronized to a computer via the USB interface.

[0072] like Figure 4 and Figure 5 As shown, in the present invention, the dual infrared camera assembly is adjustable on the suspension connecting frame, and the adjustable angle of the dual infrared camera assembly on the suspension connecting frame is 90°. The dual infrared camera assembly 3 includes a hollow support rod portion 31 and a connecting rod portion 32, the connecting rod portion 32 is vertically arranged at the middle position of the support rod portion 31, the connecting rod portion 32 is connected to the bottom end of the suspension connecting frame 2, the support rod portion 31 is vertically connected to the connecting rod portion 32 and is horizontally arranged, the support rod portion 31 is a symmetrical structure, and a camera fixing seat is respectively provided at both ends, and the center distance between the two camera fixing seats is 54 mm to 74 mm, and each camera fixing seat is installed with an infrared camera 33, and the two infrared cameras 33 respectively shoot the left and right eyes of the subject.

[0073] The other end of the connecting rod 32 is hinged to the bottom end of the suspension connecting frame 2, and a fastening bolt 24 is provided at the hinge. The dual infrared camera assembly 3 can fine-tune the shooting angle through the hinge structure of its connecting rod 32 and the suspension connecting frame 2. The connecting rod 32 is rotated to change the shooting angle of the infrared cameras 33 on both sides of the support rod 31, and a better shooting angle is required to be taken, and finally a more accurate detection result can be obtained. After adjusting the rotation angle of the dual infrared camera assembly 3, the fastening bolt 24 is tightened to fix the connecting rod 32 to the suspension connecting frame 2. It should be noted that since the infrared camera 33 is close to the eye, the eye image data can be captured. The angle adjustment here is just a fine-tuning operation on this basis to further optimize the shooting effect.

[0074] In an optional embodiment, the two infrared cameras 33 work independently to capture only one eye of the subject.

[0075] like Figure 5As shown, in this embodiment, the connecting rod portion 32 is a flat rectangular body, and the interior is hollow, and an axis groove 321 is provided at its end, and the axis groove 321 is communicated with the inner cavity of the connecting rod portion 32. A rotating shaft 23 is provided at the bottom of the suspension connecting frame 2, and the shape of the rotating shaft 23 matches the axis groove 321. The rotating shaft 23 is provided with a through hole, and the rotating shaft 23 is placed in the axis groove 321. The fastening bolt 24 passes through the side wall of the axis groove 321 and the through hole of the rotating shaft 23, so that the rotating shaft 23 is rotatably connected with the axis groove 321. The rotating shaft 23 is a cylinder, and a fan ring structure is cut out from the side of the cylinder, so that a fan ring groove is formed on the side of the cylindrical rotating shaft 23, which serves as a rotating opening 233 on the side of the rotating shaft 23. The rotating opening 233 has a first abutting surface 231 and a second abutting surface 232. The first abutting surface 231 and the second abutting surface 232 are parallel to the axis of the rotating shaft 23, and the groove edge 3211 parallel to the axial direction on the shaft groove 321 includes a first groove edge and a second groove edge. The first groove edge and the second groove edge correspond to the first abutting surface 231 and the second abutting surface 232 respectively. As the rotating shaft 23 rotates in the shaft groove 321, when the first groove edge contacts the first abutting surface 231, the connecting rod portion 32 rotates around the bottom end of the suspension connecting frame 2 to the first extreme position; when the second groove edge contacts the second abutting surface 232, the connecting rod portion 32 rotates around the bottom end of the suspension connecting frame 2 to the second extreme position, and the rotation angle of the connecting rod portion 32 between the first extreme position and the second extreme position is an adjustable angle.

[0076] In other optional embodiments, the adjustable angle of the dual infrared camera assembly 3 on the suspension connecting frame 2 is 40°, 60° or 120°.

[0077] The outer side surfaces of the two side walls of the shaft groove 321 are respectively provided with a circular groove and a polygonal groove. The fastening bolt 24 is inserted into the shaft groove 321 from the circular groove side, then passes through the through hole of the rotating shaft 23, and finally passes out from the polygonal groove side, and is tightened with the polygonal nut 25 to complete the tightening. At this time, the polygonal nut 25 is placed in the polygonal groove, and the bolt head of the fastening bolt 24 is placed in the circular groove.

[0078] In this embodiment, a gap 234 is formed between the first abutting surface 231 of the rotating opening 233 of the rotating shaft 23 and the front housing 21 of the connecting frame, and the connecting wire of the dual infrared camera assembly 3 passes through the hollow supporting rod portion 31 and the connecting rod portion 32, and then passes through the gap 234 into the cavity of the suspension connecting frame 2. The first groove edge of the shaft groove 321 is a rounded edge, which can reduce the sharpness of the first groove edge, thereby ensuring that the connecting wire will not be cut during the rotation of the rotating shaft 23 and the shaft groove 321.

[0079] In a preferred embodiment, an infrared fill light 34 is provided beside each camera mount to provide additional lighting in a low-light or completely dark environment so that the infrared camera 33 can capture the cleaned eye image. The light emitted by the infrared fill light 34 is infrared light that is invisible to the human eye, but can be captured by the infrared camera 33. Specifically, the infrared fill light 34 is located between the connecting rod 32 and the camera mount on the same side.

[0080] In the present invention, the dual infrared camera assembly can be a manual rotating structure or an electrically controlled rotating structure. When the electrically controlled rotating structure is adopted, the rotating shaft 23 is rotationally connected to the shaft groove 321, and the rotating shaft 23 is controlled by a servo motor (also called a rotating steering gear). The servo motor can be arranged inside the suspension connecting frame 2, or the size of the connecting rod portion 32 can be increased to install the servo motor. The connecting line of the servo motor passes through the inner cavity of the suspension connecting frame 2 and then enters the head-mounted device body 1 to connect with the working main board. For the dual infrared camera assembly 3 with an electrically controlled rotating structure, there is no need to use fastening bolts at the rotating shaft, and it can be fixed by the control of the servo motor.

[0081] like Figure 3 As shown, in a preferred embodiment, the lower surface of the head-mounted device body 1 is provided with a photo sensor 16 corresponding to the two infrared cameras 33. Each photo sensor 16 is used to sense the infrared light of the infrared camera 33 on the same side. It has a built-in infrared photosensitive diode and an infrared photosensitive resistor. The resistance value changes with the change of the infrared light intensity. The photo sensor 16 outputs different current signals. When adjusting the angle of the dual infrared camera assembly 3, the elevation angle of the infrared camera 33 changes, and the infrared light intensity sensed by the photo sensor 16 becomes larger and larger. When it reaches the preset value, a signal is sent to the working main board, indicating that the elevation angle of the infrared camera 33 at this time is appropriate, and the adjustment of the dual infrared camera assembly 3 is stopped. As can be seen from the above, if the device is equipped with a manually rotating dual infrared camera assembly 3, the device system can remind the user to stop rotating through a prompt light or a prompt sound; if the device is equipped with an electrically controlled rotating dual infrared camera assembly 3, the device system directly controls the servo motor to stop moving through signal feedback.

[0082] At this time, the control box 5 has the function of controlling the rotation adjustment of the dual infrared camera assembly 3. Specifically, the control box 5 is provided with a positive rotation key and a reverse rotation key. When the user presses the positive rotation key, the connecting rod portion 32 of the dual infrared camera assembly 3 rotates downward with the bottom end of the suspension connecting frame 2 as the center, and the shooting elevation angle of the infrared camera 33 increases; when the user presses the negative rotation key, the dual infrared camera assembly 3 rotates in the opposite direction, and the shooting elevation angle of the infrared camera 33 decreases.

[0083] In a specific embodiment, a loop 121 is provided at the end of the foot 12 of the head mounted device body 1, and the loops 121 of the two feet 12 are respectively connected to the two ends of the elastic band 15. The elastic band 15 is provided with an adjustment ring, and the length of the elastic band 15 can be adjusted through the adjustment ring, thereby adjusting the wearing size of the head mounted device body 1 to adapt to users with different head circumference sizes, ensuring wearing comfort and stability.

[0084] like Figure 7 As shown, in a specific embodiment, the housing of the eye fatigue detection device includes a front shell and a back plate, which are snap-fitted and fixed by screws. A snap-fitting protrusion is provided near the edge of the inner wall of the front shell, and a snap-fitting hole is provided at the edge of the back plate. The snap-fitting protrusion and the snap-fitting hole are snap-fitted and connected in a detachable manner. A plurality of sets of screw seats are provided on the inner wall of the front shell, and a plurality of screw holes are provided on the back plate corresponding to the screw seats, and the screws are inserted into the screw seats through the screw holes for fastening.

[0085] The front shell includes an integrally formed functional part shell 101 and a foot shell 102 located on both sides, and a connecting frame front shell 21 is integrally formed in the middle and lower part of the functional part shell 101. The back plate includes a left foot back plate 103, a middle back plate 104, a right foot back plate 105 and a connecting frame back plate 22, the left foot back plate 103 and the right foot back plate 105 correspond to the two foot shells 102 respectively, the middle back plate 104 corresponds to the functional part shell 101, and the connecting frame back plate 22 corresponds to the connecting frame front shell 21. The functional part shell 101 is composed of a top plate, a front plate and a bottom plate, forming a C-shaped accommodating cavity with one side open, the top plate is provided with a plurality of heat dissipation holes and a card slot, the middle of the front plate is provided with a sensor sensing hollow opening, the front plate is also provided with a plurality of heat dissipation holes on both sides of the sensor sensing hollow opening, the middle of the bottom plate is provided with a notch, the connecting frame front shell 21 is connected to the notch, and the bottom plate is also provided with a plurality of heat dissipation holes on both sides of the notch. The above-mentioned several heat dissipation holes provide air flow channels for the C-type accommodating cavity, and are arranged around the core electronic components, ensuring that air can enter and flow out of the C-type accommodating cavity from different directions, thereby improving the heat dissipation efficiency of the core electronic components. The above-mentioned sensor sensing hollow opening serves as a sensing window for the TOF sensor 14, ensuring that the TOF sensor 14 can accurately sense the environment ahead. The notch in the above-mentioned bottom plate provides a threading port for the connecting wire of the dual infrared camera assembly 3. The connecting wire of the dual infrared camera assembly 3 is first routed through the cavity inside the suspension connecting frame 2, and then introduced into the C-type accommodating cavity through the notch, and finally connected to the working mainboard.

[0086] The foot housing 102 connected to the foot 12 of the control box 5 has a flexible circuit board on the inner side of its top wall, and the flexible circuit board connects the working main board and the interface board, and the interface board is a TYPE-C interface board or a USB interface board. The functional housing 101 is provided with a buried wire groove on one side close to the foot 12 connected to the power supply box or the control box 5, and the connection line between the flexible circuit board and the working main board is arranged in the buried wire groove. The buried wire groove is formed by the gap between a number of parallel plate ribs 1011, which can not only provide multiple parallel orderly wiring paths to reduce signal transmission interference between each other, but also enhance the structural strength of the front shell and improve the rigidity and durability of the device.

[0087] The connection between the functional part shell 101 and the support foot shell 102 has an arc transition shell section, which is used to disperse stress and reduce stress concentration caused by hard corners, thereby improving the overall structural strength; the smooth arc transition also helps to make the appearance of the entire device more integrated and beautiful.

[0088] The middle back plate 104, the left instep plate 103 and the right instep plate 105 are all arc-shaped, and the two ends of the middle back plate 104 extend to the junction of the functional part shell 101 and the foot shell 102, while the left instep plate 103 and the right instep plate 105 only cover the foot shell 102 on the corresponding side. The arc transition reduces the pressure of the hard corner on the user's forehead and improves the wearing comfort. The material of the back plate is preferably thermoplastic polyurethane, which has good elasticity and flexibility, strong wear resistance and long service life. The surface of the middle back plate 104 is provided with a number of rubber pads 1041 or silicone pads to provide higher elasticity and further improve the wearing comfort of the device.

[0089] In a preferred embodiment, one end of the suspension connecting frame 2 is disposed in the middle position below the head-mounted device body 1, and the other end is inclined downwardly extending away from the subject and exceeding the subject's eyes, so that the suspension connecting frame 2 is inclined outwardly disposed below the head-mounted device body 1. The vertical distance L from the top back of the suspension connecting frame 2 to the back plate of the head-mounted device body 1 is 5 to 10 mm, and the inclination angle a of the back of the suspension connecting frame 2 is 10° to 15°, so that there is enough space from the top back of the suspension connecting frame 2 to the subject's brow bone to accommodate the frame of myopic glasses, and at the same time, the suspension connecting frame 2 is inclined on the basis of its top being away from the subject at a certain distance, so as to ensure that the suspension connecting frame 2 will not bump against the subject's nose bridge even at a small inclination angle.

[0090] As can be seen from the foregoing, the housing of the suspension connecting frame 2 includes a connecting frame front housing 21 and a connecting frame back plate 22, and the connecting frame front housing 21 and the connecting frame back plate 22 are assembled into a hollow internal suspension connecting frame 2. The connecting frame back plate 22 is provided with a nose pad mounting groove 221, and a removable elastic nose pad 4 is mounted on the nose pad mounting groove 221. The suspension connecting frame 2 is supported on the nose bridge of the subject by the elastic nose pad 4, which is beneficial to the stability of the device when worn, and the elastic nose pad 4 is soft and can improve the comfort of wearing.

[0091] like Figure 6 As shown, the elastic nose pad 4 includes an integrally formed connection and fixing portion 41 and a nose bridge supporting portion 43, the nose bridge supporting portion 43 being formed by folding and extending the end of the connection and fixing portion 41 and being perpendicular to the connection and fixing portion 41. The connection and fixing portion 41 is provided with a strip hole 42, a plurality of screw holes are provided in the nose pad mounting groove 221, a circular hole is provided at the position corresponding to the screw hole of the strip hole 42, a plurality of circular holes are provided along the length direction of the strip hole 42, and the width of the circular hole is greater than the width of the strip hole 42. A plurality of screws are sequentially passed through the corresponding circular holes and screw holes and tightened, the strip hole 42 is deformed under the squeezing force of the screws, so that the squeezing force is released at the strip hole 42 and will not be transmitted to the outside of the connection and fixing portion 41, so that the connection and fixing portion 41 of the elastic nose pad 4 will not be deformed or displaced during the installation process, and the nose bridge supporting portions 43 on both sides are symmetrically and stably supported on the nose bridge of the subject.

[0092] The end of the supporting nose bridge portion 43 extends to below the nose pads of the subject's glasses, and the supporting nose bridge portion 43 is turned outward so that the outer side surfaces of the supporting nose bridge portion 43 respectively abut against the two frames of the glasses. When the subject wears the portable eye fatigue detection device with infrared camera of this embodiment while wearing glasses, the nose pads of the glasses and the supporting nose bridge portion 43 of the elastic nose pad 4 are in contact with the subject's nose bridge. In this way, the weight of the device is transferred to the nose bridge through its elastic nose pad 4, instead of the weight of the device and the weight of the glasses being transferred through the nose pads of the glasses. Therefore, the supporting nose bridge portion 43 of this embodiment increases the contact area between the device and the subject's nose bridge, reduces the pressure, and avoids the discomfort of wearing.

[0093] like Figure 8 As shown, the present invention also provides a method for using the eye fatigue detection device, which is implemented by the eye fatigue detection device described in the above scheme, including the following steps:

[0094] Step 1: plug the control box into the head mounted device.

[0095] Step 2: Wear the head-mounted device and start it up through the control box;

[0096] Step 3: Adjust the angle of the dual infrared camera assembly;

[0097] Step 4: Select the required detection mode through the control box and wait for the detection to be completed;

[0098] Step 5: Send data to other devices via the control box.

[0099] In the above step 2, when wearing the head-mounted device, the elastic nose pad on the back of the suspension connection frame is correctly placed on the bridge of the nose. Specifically, the two supporting nose bridge parts 43 are respectively located on the left and right sides of the bridge of the nose; if wearing myopic glasses, the supporting nose bridge part 43 needs to be located under the nose pads of the glasses. The specific operation is: first slightly lift the glasses, place the supporting nose bridge part 43, and then put down the glasses. Adjust the elastic band of the head-mounted device main body support foot to adapt to the size of the head, and ensure that the device is neither too tight to cause discomfort nor too loose to slide easily.

[0100] In the above step 3, it specifically includes:

[0101] Step 301: initial positioning;

[0102] Loosen the fastening bolts and rotate the dual infrared camera assembly to the top. At this time, the shooting elevation angle of the dual infrared camera assembly is the smallest.

[0103] Step 302: fine-tuning;

[0104] Gently rotate the dual infrared camera assembly to gradually increase its shooting elevation angle;

[0105] Step 303, complete the adjustment;

[0106] When the infrared light intensity sensed by the light sensor 16 reaches a preset value, a signal is sent to the working mainboard, and the user manually stops adjusting or the working mainboard actively controls the dual infrared camera components to stop rotating, thereby completing the angle adjustment.

[0107] In an optional embodiment, the dual infrared camera assembly is an eye fatigue detection device with a manual rotating structure, and the working main board sends a prompt signal (sound or indicator light flashing) to prompt the completion of adjustment.

[0108] In another optional embodiment, the dual infrared camera assembly is an eye fatigue detection device with an electrically controlled rotating structure. The user can adjust the angle of the dual infrared camera assembly through the forward rotation key and the reverse rotation key of the control box. When the user presses the forward rotation key, the shooting elevation angle of the dual infrared camera assembly 3 increases. When the user presses the negative rotation key, the shooting elevation angle of the dual infrared camera assembly 3 decreases. The working main board recognizes the position of the eyes through the infrared camera, and sends a control command to stop the rotation of the servo motor to complete the adjustment.

[0109] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0110] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An eye fatigue detection device, characterized in that: The device comprises a head-mounted device body and a dual infrared camera assembly, wherein the dual infrared cameras are arranged at the middle and lower part of the head-mounted device body through a suspension connection frame, and the dual infrared cameras are rotatably connected to the suspension connection frame; the dual infrared camera assembly is symmetrically provided with two infrared cameras, and the two infrared cameras correspond to the left and right eyes of the subject respectively; The head mounted device body has a built-in working mainboard, the working mainboard integrates a processing chip, and the processing chip is used to receive data from the two infrared cameras; A control box is plugged into one of the side legs of the head-mounted device body, and the control box is electrically connected to the head-mounted device body; the control box has a built-in control module, and the control box has a plurality of buttons, and the buttons are used to operate the control module to send control instructions.

2. The eye fatigue detection device according to claim 1, characterized in that: The adjustable angle of the dual infrared camera assembly on the suspension connecting frame is 90°.

3. The eye fatigue detection device according to claim 1, characterized in that: The working mainboard integrates a WiFi module, a 4G / 5G module and a Bluetooth module. The WiFi module is used to upload the detection data to the cloud service via the WiFi network, the 4G / 5G module is used to provide a cellular network connection to transmit data, and the Bluetooth module is used to wirelessly connect to a smart mobile device with a Bluetooth signal.

4. The eye fatigue detection device according to claim 1, characterized in that: The head-mounted device body is also provided with a TOF sensor, and the detection direction of the TOF sensor is toward the front of the head-mounted device body.

5. The eye fatigue detection device according to claim 1, characterized in that: The dual infrared camera assembly is also symmetrically provided with two infrared fill light lamps, one infrared fill light corresponds to one infrared camera; the infrared fill light lamp is electrically connected to the working mainboard.

6. The eye fatigue detection device according to claim 1, characterized in that: The control instructions include a power-on control instruction, a power-off control instruction, a start detection instruction, a pause / resume detection instruction, a parameter setting instruction and a mode selection instruction.

7. The eye fatigue detection device according to claim 1, characterized in that: The lower surface of the head-mounted device body is provided with light sensors corresponding to the two infrared cameras, respectively, and the light sensors are used to detect the infrared light of the infrared cameras on the same side.

8. A method for using the eye fatigue detection device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: plug the control box into the head mounted device. Step 2: Wear the head-mounted device and start it up through the control box; Step 3: Adjust the angle of the dual infrared camera assembly; Step 4: Select the required detection mode through the control box and wait for the detection to be completed; Step 5: Send data to other devices via the control box.

9. The method for using the eye fatigue detection device according to claim 8, characterized in that: The step 3 specifically includes: adjusting the angle of the dual infrared camera assembly until the photo sensor outputs a signal, thereby completing the angle adjustment.

10. The method for using the eye fatigue detection device according to claim 9, characterized in that: In step 3, the angle of the dual infrared camera assembly is adjusted by the forward rotation key and the reverse rotation key of the control box. When the sensing value of the light sensor is equal to the preset value, a signal is output and the dual infrared camera assembly stops rotating.

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