Eye tracker system

Abstract

The invention relates to an eye tracker system. The system comprises a positioning mounting assembly, a horizontal adjusting assembly, a vertical adjusting assembly, a spacing adjusting assembly and an eye movement detection device. The positioning installation assembly comprises an installation plate and an adjusting seat connected with the installation plate. A horizontal adjusting groove is formed in the adjusting seat, and a horizontal lead screw is connected into the horizontal adjusting groove. The horizontal adjusting assembly comprises a first moving seat movably connected to the horizontal lead screw. The vertical adjusting assembly comprises a vertical lead screw, a second moving seat movably connected to the vertical lead screw, a bottom plate and a sliding frame movably connected to the adjusting seat, and the first moving seat is connected with the sliding frame; the two ends of the vertical lead screw are rotationally connected to the sliding frame and the bottom plate correspondingly. The spacing adjusting assembly comprises a spacing adjusting seat fixed above the second moving seat, a bidirectional screw rod is arranged in the spacing adjusting seat, and a third moving seat arranged on the bidirectional screw rod; the two third moving seats can get close to each other and get away from each other along the two-way screw rod; the third moving seat is used for installing an eye movement detection device.

Description

Technical Field

[0001] This application relates to the technical field of eye tracker devices, and particularly to an eye tracker system. Background Art

[0002] Wearing a head-mounted eye tracker for a long time can cause fatigue and discomfort in the head. For example, when a train driver wears an eye tracker, the wearer needs to sit for a long time in a closed and limited space cab, with highly concentrated attention, and is extremely likely to cause railway safety hazards due to fatigue driving. As an important device for monitoring the fatigue state of the driver, the eye tracker can judge the degree of fatigue by capturing indicators such as blink frequency and fixation stability, and issue an alarm in a timely manner. In the prior art, although the head-mounted eye tracker disclosed in Chinese Patent Publication No. CN219782514U reduces facial occlusion through designs such as a telescopic housing and an ear hook structure, it needs to be directly worn on the head. When a train driver works continuously for several hours, the head-mounted structure will continuously press on parts such as the head and auricle, resulting in discomfort and even affecting normal operation. In addition, the existing device relies on the head fixation method and cannot flexibly adjust the detection position according to the individual differences of the driver, resulting in detection blind spots or limitations of contact monitoring. There is an urgent need to improve the non-contact installation scheme to enhance comfort and detection accuracy. Summary of the Invention

[0003] Based on this, it is necessary to provide an eye tracker system for the problem of discomfort in wearing the existing eye tracker.

[0004] An eye tracker system includes:

[0005] A positioning and installation component, including a mounting plate and an adjustment seat connected to the mounting plate;

[0006] The adjustment seat is provided with a horizontal adjustment groove, and a horizontal lead screw is rotatably connected in the horizontal adjustment groove;

[0007] A horizontal adjustment component, including a first moving seat, and the first moving seat is movably connected to the horizontal lead screw;

[0008] A vertical adjustment component, including a second moving seat, a vertical lead screw, a sliding frame and a bottom plate; the sliding frame is movably connected to the adjustment seat, and the first moving seat is connected to the sliding frame; the two ends of the vertical lead screw are respectively rotatably connected to the sliding frame and the bottom plate;

[0009] The second moving seat is movably connected to the vertical lead screw;

[0010] A spacing adjustment component, including a spacing adjustment seat and a third moving seat; the spacing adjustment seat is connected to the second moving seat. A bidirectional lead screw is arranged in the spacing adjustment seat, and two third moving seats are symmetrically arranged on the bidirectional lead screw, and the two third moving seats can approach and move away from each other along the bidirectional lead screw; the third moving seat is used for installing an eye movement detection device.

[0011] In one embodiment, a first motor is provided on the adjusting seat; the output end of the first motor is connected to a horizontal lead screw;

[0012] A second motor is provided on the bottom plate, and the output end of the second motor is connected to the end of a vertical lead screw;

[0013] A third motor is provided on the spacing adjustment seat, and the output end of the third motor is connected to the end of a bidirectional screw.

[0014] In one embodiment, a guiding slide bar is connected between the sliding frame and the bottom plate, and the second moving seat is provided with a sliding through hole adapted to the guiding slide bar.

[0015] In one embodiment, the spacing adjustment seat is fixedly connected to the second moving seat through a fixing rod.

[0016] In one embodiment, both ends of the horizontal lead screw are respectively mounted on both sides of the horizontal adjustment groove through bearings;

[0017] Both ends of the vertical lead screw are respectively connected to the sliding frame and the bottom plate through bearings;

[0018] Both ends of the bidirectional screw are respectively mounted on both sides of the inner cavity of the spacing adjustment seat through bearings.

[0019] In one embodiment, the first moving seat is slidably engaged with the inner wall of the horizontal adjustment groove;

[0020] A sliding track is provided on the adjusting seat, and the sliding frame is movably engaged with the sliding track;

[0021] The third moving seat is movably engaged with the inner wall of the spacing adjustment seat.

[0022] In one embodiment, the eye movement detection device includes: two groups of adjusting rods, two groups of first connecting rods, two groups of second connecting rods and two groups of mounting rods;

[0023] The adjusting rod is fixedly connected to the third moving seat correspondingly. The bottom of the adjusting rod is rotationally engaged with one end of the first connecting rod. The other end of the first connecting rod is rotationally connected to one end of the second connecting rod. The other end of the second connecting rod is rotatably mounted with a mounting rod. The other end of the mounting rod is fixedly mounted with a first camera, and the top surface of the first connecting rod is fixedly mounted with a second camera.

[0024] In one embodiment, the adjusting rod is fixedly connected to the third moving seat through a bolt. A rotating shaft is provided at the bottom of the adjusting rod, and a rotating hole adapted to the rotating shaft is provided at one end of the first connecting rod.

[0025] In one embodiment, the first connecting rod and the second connecting rod are connected through a rotating shaft and a rotating hole, and a locking nut is provided on the rotating shaft.

[0026] In one embodiment, the mounting rod is rotatably connected to the second connecting rod through a universal joint, and the universal joint allows the mounting rod to rotate in the horizontal and vertical directions.

[0027] The above-mentioned eye tracker system includes a positioning and mounting assembly, a horizontal adjustment assembly, a vertical adjustment assembly, a spacing adjustment assembly, and an eye movement detection device. The positioning and mounting assembly includes a mounting plate and an adjustment base connecting the mounting plate. The adjustment base is provided with a horizontal adjustment groove, and a horizontal lead screw is rotatably connected in the horizontal adjustment groove. The horizontal adjustment assembly includes a first moving seat, and the first moving seat is movably connected to the horizontal lead screw; the first moving seat is matched with the horizontal lead screw through a threaded hole, and when the horizontal lead screw rotates, the first moving seat moves along the axial direction of the lead screw. The vertical adjustment assembly includes a second moving seat, a vertical lead screw, a sliding frame, and a bottom plate; the sliding frame is movably connected to the adjustment base, and the first moving seat is connected to the sliding frame; both ends of the vertical lead screw are respectively rotatably connected to the sliding frame and the bottom plate. The second moving seat is movably connected to the vertical lead screw. The spacing adjustment assembly includes a spacing adjustment seat and a third moving seat; the spacing adjustment seat is fixed above the second moving seat, a bidirectional lead screw is arranged in the spacing adjustment seat, and two third moving seats are symmetrically arranged on the bidirectional lead screw, and the two third moving seats can approach and move away from each other along the bidirectional lead screw; the third moving seat is used for mounting the eye movement detection device. The eye tracker system can flexibly adjust the detection position according to individual differences, effectively improving the accuracy and reliability of eye movement detection, and solving the limitation problem of contact monitoring in the prior art. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the eye tracker system provided by the embodiment of the present application.

[0029] Figure 2 It is a bottom view of the positioning and mounting assembly provided by the embodiment of the present application.

[0030] Figure 3 It is an assembly schematic diagram of the eye movement detection device and the spacing adjustment assembly provided by the embodiment of the present application.

[0031] Figure 4 It is a partial cross-sectional view of the spacing adjustment assembly provided by the embodiment of the present application.

[0032] Reference Numerals in the Drawings:

[0033] 1. Mounting plate; 2. Adjusting base; 3. Horizontal adjusting groove; 4. First moving seat; 5. Horizontal lead screw; 6. Second moving seat; 7. Vertical lead screw; 8. Third moving seat; 9. Bidirectional screw; 10. First motor; 11. Sliding frame; 12. Base plate; 13. Second motor; 14. Guide slide bar; 15. Spacing adjusting seat; 16. Third motor; 17. Adjusting rod; 18. First connecting rod; 19. Second connecting rod; 20. Mounting rod; 21. First camera; 22. Second camera; 23. Fixed rod. Detailed implementation manners

[0034] To make the above objects, features, and advantages of the present application more apparent 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 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.

[0035] In the description of the present application, it should be understood that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0036] In addition, if these terms "first" and "second" appear, these terms are only used for descriptive purposes and cannot 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 of such features. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In this application, unless otherwise clearly stipulated or defined, if terms such as "installed", "connected", "joined", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] In this application, unless otherwise clearly stipulated or defined, if there is a description such as a first feature being "on" or "under" a second feature, its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower horizontal level than the second feature.

[0039] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation manner.

[0040] Refer to Figure 1 and Figure 2 as shown in Figure 1 is a schematic structural view of the eye tracker system provided by an embodiment of this application. Figure 2 is a bottom view of the positioning and installation component provided by an embodiment of this application. As shown in an eye tracker system, it includes a positioning and installation component, a horizontal adjustment component, a vertical adjustment component, a spacing adjustment component, and an eye movement detection device.

[0041] The positioning and installation component includes a mounting plate 1 and an adjustment base 2 connected to the mounting plate 1. The adjustment base 2 is provided with a horizontal adjustment groove 3, and a horizontal lead screw 5 is rotatably connected in the horizontal adjustment groove 3. The mounting plate 1 serves as the outermost mounting carrier and is used to be fixed on external devices (such as a desktop, a bracket, etc.). The adjustment base 2 is fixed to the mounting plate 1 by bolts or buckles.

[0042] The horizontal adjustment assembly includes a first moving seat 4, and the first moving seat 4 is movably connected to the horizontal lead screw 5; the first moving seat 4 is matched with the horizontal lead screw 5 through a threaded hole, and when the horizontal lead screw 5 rotates, the first moving seat 4 moves along the axial direction of the lead screw.

[0043] The vertical adjustment assembly includes a second moving seat 6, a vertical lead screw 7, a sliding frame 11 and a bottom plate 12; the sliding frame 11 is movably connected to the adjustment seat 2, and the first moving seat 4 is connected to the sliding frame 11; both ends of the vertical lead screw 7 are respectively rotatably connected to the sliding frame 11 and the bottom plate 12. The second moving seat 6 is movably connected to the vertical lead screw 7. The sliding frame 11 is connected to the adjustment seat 2 through a guide rail and is fixed to the first moving seat 4 at the bottom. The second moving seat 6 is screwed into the vertical lead screw 7 and is matched with the guide rail of the sliding frame 11 to ensure no deviation during vertical movement.

[0044] The spacing adjustment assembly includes a spacing adjustment seat 15 and a third moving seat 8; the spacing adjustment seat 15 is fixed above the second moving seat 6, and a bidirectional lead screw is arranged in the spacing adjustment seat 15. The two third moving seats 8 are symmetrically arranged on the bidirectional lead screw, and the two third moving seats 8 can approach and move away from each other along the bidirectional lead screw; the third moving seat 8 is used to install the eye movement detection device. The two third moving seats 8 are symmetrically installed on the bidirectional lead screw through reverse threads to ensure synchronous approach or separation during rotation.

[0045] The mounting plate 1 and the adjustment seat 2 form a pre-positioning guide through the contour matching of the limiting boss and the groove, and then are fastened by bolts to achieve the effects of rapid alignment and rigid connection, avoid the deviation that may occur in a single bolt connection, ensure the stability and reliability of the installation reference of the entire adjustment system, and are applicable to scenarios that require frequent disassembly and assembly.

[0046] The horizontal lead screw 5 is connected to the first moving seat 4 through a thread pair. When the lead screw rotates, the first moving seat 4 slides smoothly along the axis. With the lateral constraint of the guide rail on the inner wall of the horizontal adjustment groove 3 on the first moving seat 4, the horizontal linear fine adjustment of the eye movement detection device is realized, which can flexibly adapt to different face widths, avoid the detection position deviation caused by fixed installation, and improve the compatibility of the system with diverse users.

[0047] The vertical adjustment assembly quickly adjusts the height of the eye movement detection device. The spacing adjustment assembly uses a bidirectional lead screw to synchronously drive the two detection devices to automatically adapt to different pupil distances. The sliding frame 11 is movably connected to the adjustment seat 2 through a guide rail. Combined with the limit of the second moving seat 6 by the guide slide bar 14, a three-dimensional guiding structure of double rails plus double rods is formed to ensure no deviation and no shaking during vertical adjustment, enable the eye movement detection device to maintain a stable posture during lifting, avoid the detection angle error caused by mechanical vibration, and improve the smoothness of vertical adjustment.

[0048] The above eye tracker system is fixed to an external device through a positioning and mounting component, without the need to be worn on the head, avoiding the head and auricle compression fatigue and discomfort caused by long-term wearing of head-mounted eye trackers. It is especially suitable for scenarios where users need to maintain a sitting posture for a long time, such as train drivers. In the horizontal adjustment component, the first moving seat 4 in the horizontal adjustment component is matched with the horizontal lead screw 5 through a threaded hole. When the horizontal lead screw 5 rotates, the first moving seat 4 moves along the axial direction of the lead screw, and the horizontal position of the eye movement detection device can be flexibly adjusted to adapt to different face widths and ensure accurate detection positions. In the vertical adjustment component, the sliding frame 11 is movably connected to the adjustment seat 2, the first moving seat is connected to the sliding frame 11, both ends of the vertical lead screw 7 are rotatably connected to the sliding frame 11 and the bottom plate 12, and the second moving seat 6 is movably connected to the vertical lead screw 7, which can realize the vertical height adjustment of the eye movement detection device to meet the detection requirements of different heights or sitting postures and expand the applicable range of the system. In the spacing adjustment component, the spacing adjustment seat 15 is fixed above the second moving seat 6, and the bidirectional screw 9 inside it drives two symmetrically arranged third moving seats 8 to approach or move away from each other along the screw, which can automatically adapt to the pupil distances of different users. Compared with the traditional manual adjustment method, it improves the adjustment efficiency and accuracy. Moreover, the third moving seat 8 is used to install the eye movement detection device, enabling the two groups of detection components to synchronously and accurately adjust the spacing and reduce the detection blind area. Through the multi-dimensional adjustment design of the overall structure, non-contact installation is achieved. While improving user comfort, the detection position can be flexibly adjusted according to individual differences, effectively improving the accuracy and reliability of eye movement detection and solving the limitation problems of contact monitoring in the prior art.

[0049] In some embodiments of the present application, refer to the attached Figure 3 and attached Figure 4 , Figure 3 which is the assembly schematic diagram of the eye movement detection device and the spacing adjustment component provided by the embodiment of the present application, Figure 4 and which is the partial cross-sectional view of the spacing adjustment component provided by the embodiment of the present application. As shown above, the first motor 10 is provided on the above-mentioned adjustment seat 2; the output end of the above-mentioned first motor 10 is connected to the above-mentioned horizontal lead screw 5; the first motor 10 is fixed on the side or end of the adjustment seat 2 to ensure that the motor output shaft is coaxial with the horizontal lead screw 5. The motor output shaft and the end of the horizontal lead screw 5 are rigidly connected through a coupling (such as an elastic coupling) to ensure effective torque transmission; if the motor is equipped with a reducer, the reduction ratio needs to be calculated to match the required adjustment accuracy.

[0050] The second motor 13 is provided on the above-mentioned bottom plate 12, and the output end of the above-mentioned second motor 13 is connected to the end of the above-mentioned vertical lead screw 7; the second motor 13 is fixed at the bottom of the bottom plate 12, and the output shaft passes upward through a bearing seat and is connected to the vertical lead screw 7. A right-angle reducer (such as a worm and worm gear reducer) is used to convert the horizontal output of the motor into the rotational movement of the vertical lead screw 7 to save space.

[0051] The bottom of the vertical lead screw 7 is connected to the output shaft of the reducer through a coupling, and the top is fixed on the sliding carriage 11 through deep groove ball bearings.

[0052] A third motor 16 is provided on the above-mentioned spacing adjustment seat 15, and the output end of the third motor 16 is connected to the end of the above-mentioned bidirectional screw. The third motor 16 is installed at the end of the spacing adjustment seat 15, and the output shaft is directly connected to the bidirectional screw. Both ends of the bidirectional screw are fixed in the adjustment seat 2 through thrust bearings to bear the axial force. The motor output shaft and the bidirectional screw are connected through a keyway or a set screw to ensure synchronous rotation; the micro-stepping control of a stepper motor or a servo motor can achieve micron-level positioning.

[0053] In some embodiments of the present application, a guiding slide bar 14 is connected between the above-mentioned sliding carriage 11 and the above-mentioned bottom plate 12, and the above-mentioned second moving seat 6 is provided with a sliding through hole adapted to the above-mentioned guiding slide bar 14.

[0054] The guiding slide bar 14 and the sliding through hole of the second moving seat 6 form a low-friction sliding pair through a linear bearing or a sliding bearing. Usually, two parallel guiding slide bars 14 are configured to form a triangular stable structure with the vertical lead screw 7 to prevent the second moving seat 6 from rotating around the axis of the lead screw. The guiding slide bar 14 only provides a guiding function, and the vertical driving force is transmitted by the vertical lead screw 7 to ensure that the second moving seat 6 moves precisely along the direction of the slide bar. The guiding slide bar 14 restricts the second moving seat 6 to move only in a straight line, avoids the spiral effect generated when the lead screw rotates, and reduces the vertical displacement of the eye movement detection device.

[0055] In some embodiments of the present application, the above-mentioned spacing adjustment seat 15 is fixedly connected to the above-mentioned second moving seat 6 through a fixing rod 23. The spacing adjustment seat 15 and the second moving seat 6 are rigidly connected through at least two parallel fixing rods 23 to ensure no relative displacement. Both ends of the fixing rod 23 are fixed to the bottom of the spacing adjustment seat 15 and the top of the second moving seat 6 respectively by means of threads, bolts or welding, so that the two become an integral motion unit. The fixing rod 23 ensures that the spacing adjustment seat 15 rises and falls synchronously with the second moving seat 6, avoids measurement deviation caused by loosening of the connection, and improves the positioning accuracy in the vertical direction.

[0056] In some embodiments of the present application, both ends of the above-mentioned horizontal lead screw 5 are respectively installed on both sides of the above-mentioned horizontal adjustment groove 3 through bearings; both ends of the above-mentioned vertical lead screw 7 are respectively connected to the above-mentioned sliding carriage 11 and the above-mentioned bottom plate 12 through bearings; both ends of the above-mentioned bidirectional screw 9 are respectively installed on both sides of the inner cavity of the above-mentioned spacing adjustment seat 15 through bearings.

[0057] In some embodiments of the present application, the first moving seat 4 is slidably engaged with the inner wall of the horizontal adjustment groove 3; the inner wall of the horizontal adjustment groove 3 is machined with a dovetail groove or a rectangular guide rail, and a matching slider is designed at the bottom of the first moving seat 4 to form a sliding pair. The inner wall of the horizontal adjustment groove 3 is designed as a guiding structure (such as a groove rail or a plane) matching the outer shape of the first moving seat 4, and the first moving seat 4 is embedded in the groove by means of contour fitting, and is only allowed to slide along the axial direction of the horizontal lead screw 5 (limiting up-and-down shaking and left-and-right shaking).

[0058] A sliding track is provided on the adjusting seat 2, and the sliding frame 11 is movably engaged with the sliding track; a linear guide rail is installed on the side of the adjusting seat 2, and the sliding frame 11 is connected thereto through a slider. A sliding track (such as a linear track or a convex track) matching the bottom or side of the sliding frame 11 is provided on the adjusting seat 2, and the sliding frame 11 is arranged on the track by means of contour fitting, and is only allowed to slide in the vertical direction (limiting horizontal deflection or inclination).

[0059] The third moving seat 8 is movably engaged with the inner wall of the spacing adjustment seat 15. The inner wall of the spacing adjustment seat 15 is designed as a guiding structure (such as a groove rail or a plane) matching the outer shape of the third moving seat 8, and the third moving seat 8 is embedded in the inner cavity by means of contour fitting, and is only allowed to slide along the axial direction of the bidirectional screw (limiting rotation or lateral offset).

[0060] In some embodiments of the present application, the eye movement detection device includes: two groups of adjustment rods 17, two groups of first connecting rods 18, two groups of second connecting rods 19, and two groups of mounting rods 20; the adjustment rods 17 are fixedly connected to the third movable seat 8, the bottom of the adjustment rod 17 is rotationally engaged with one end of the first connecting rod 18, the other end of the first connecting rod 18 is rotationally connected to one end of the second connecting rod 19, the other end of the second connecting rod 19 is rotationally mounted with the mounting rod 20, the other end of the mounting rod 20 is fixedly mounted with a first camera 21, and the top surface of the first connecting rod 18 is fixedly mounted with a second camera 22. The adjustment rod 17 is vertically fixed to the top surface of the third movable seat 8, and moves synchronously with the third movable seat 8 along the inner wall of the spacing adjustment seat 15 (driven by the bidirectional screw 9), thereby realizing the horizontal spacing adjustment of the two groups of detection components (corresponding to pupil distance adaptation). The bottom of adjustment rod 17 is hinged to one end of first connecting rod 18 via a pin, allowing first connecting rod 18 to rotate about a horizontal axis (perpendicular to the spacing adjustment direction) to adjust the pitch angle of the detection assembly (for example, adjusting the tilt of the camera to the eye). The other end of first connecting rod 18 is hinged to second connecting rod 19 via a pin, allowing second connecting rod 19 to rotate about the horizontal axis, further expanding the pitch angle adjustment range or enabling fine-tuning of the horizontal deflection of the detection assembly (for example, to adjust the angle of the side face). The end of second connecting rod 19 is rotatably connected to mounting rod 20 via a universal joint or ball joint, allowing mounting rod 20 to freely adjust its direction in three-dimensional space, enabling fine-tuning of the spatial posture of first camera 21 (for example, to align pupils at different heights or offsets).

[0061] The first camera 21 is adjusted along with the posture of the mounting rod 20 and is directed directly at the subject's eyes to capture the pupil center position and the horizontal / vertical eye movement trajectory.

[0062] The second camera 22 is arranged vertically upward or tilted to assist in monitoring eyelid movement, iris edge features, etc., forming multi-view fusion detection with the first camera 21 to improve the integrity of eye movement data (such as distinguishing eye movement from head shaking).

[0063] In some embodiments of the present application, the adjustment rod 17 is fixedly connected to the third movable base 8 via bolts. A rotational axis is provided at the bottom of the adjustment rod 17, and a rotation hole is defined at one end of the first connecting rod 18 to accommodate the rotational axis. A horizontally extending mounting lug is provided at the bottom of the adjustment rod 17, with two to four through-holes (diameters matching the bolt diameters) defined therein. The top surface of the third movable base 8 is pre-machined with corresponding threaded holes, which match the bolt specifications.

[0064] During installation, fit the ear plate of the adjusting rod 17 to the top surface of the third movable seat 8, pass the bolt through the ear plate through hole and screw it into the threaded hole of the third movable seat 8, and tighten it evenly (make sure there is no gap).

[0065] In some embodiments of the present application, the first connecting rod 18 and the second connecting rod 19 are connected by a rotating shaft and a rotating hole, and a locking nut is provided on the rotating shaft. The bottom of the adjusting rod 17 extends downward to form a cylindrical rotating shaft, and the length of the cylindrical rotating shaft is slightly greater than the thickness of the first connecting rod 18; a circular hole is opened at one end of the first connecting rod 18 to form a clearance fit with the rotating shaft. The adjusting rod 17 and the first connecting rod 18 are hinged by the rotating shaft, allowing the pitch angle of the detection assembly to be adjusted; the first connecting rod 18 and the second connecting rod 19 form an angle amplification structure through a lockable rotating connection; the mounting rod 20 and the second connecting rod 19 are connected by a universal joint to realize rotation in the horizontal and vertical directions. The multi-stage adjustment mechanism enables the camera to be aligned with the eye at multiple angles, and even if the head is slightly tilted or offset, a stable detection angle can still be maintained.

[0066] In some embodiments of the present application, the mounting rod 20 and the second connecting rod 19 are rotationally connected by a universal joint, and the universal joint allows the mounting rod 20 to rotate in the horizontal and vertical directions. Coaxial circular holes are opened at the connecting ends of the first connecting rod 18 and the second connecting rod 19; a cylindrical rotating shaft passes through the two holes, and external threads are processed at one end of the shaft.

[0067] A flat gasket is sleeved on the end of the rotating shaft passing through, and a locking nut is screwed in; when the nut is not tightened, the first and second connecting rods 19 can rotate freely around the rotating shaft; after the nut is tightened, the two rods lock the angle through friction.

[0068] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope recorded in this specification.

[0069] The above embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. An eye tracker system, characterized in that, The eye tracker system includes: A positioning and mounting component, including a mounting plate and an adjustment seat connected to the mounting plate; The adjustment seat is provided with a horizontal adjustment groove, and a horizontal lead screw is rotatably connected in the horizontal adjustment groove; A horizontal adjustment component, including a first moving seat, and the first moving seat is movably connected to the horizontal lead screw; A vertical adjustment component, including a second moving seat, a vertical lead screw, a sliding frame and a bottom plate; the sliding frame is movably connected to the adjustment seat, and the first moving seat is connected to the sliding frame; both ends of the vertical lead screw are respectively rotatably connected to the sliding frame and the bottom plate; The second moving seat is movably connected to the vertical lead screw; A spacing adjustment component, including a spacing adjustment seat and a third moving seat; the spacing adjustment seat is connected to the second moving seat; a bidirectional lead screw is arranged in the spacing adjustment seat, and the two third moving seats are symmetrically arranged on the bidirectional lead screw, and the two third moving seats can approach and move away from each other along the bidirectional lead screw; the third moving seat is used for mounting an eye movement detection device.

2. The eye movement measurement system according to claim 1, characterized in that A first motor is arranged on the adjustment seat; the output end of the first motor is connected to the horizontal lead screw; A second motor is arranged on the bottom plate, and the output end of the second motor is connected to the end of the vertical lead screw; A third motor is arranged on the spacing adjustment seat, and the output end of the third motor is connected to the end of the bidirectional lead screw.

3. The eye movement measurement system according to claim 1, wherein A guiding slide bar is connected between the sliding frame and the bottom plate, and the second moving seat is provided with a sliding through hole adapted to the guiding slide bar.

4. The eye movement measurement system according to claim 1, wherein The spacing adjustment seat is fixedly connected to the second moving seat through a fixing rod.

5. The eye movement measurement system according to claim 1, characterized in that, Both ends of the horizontal lead screw are respectively installed on both sides of the horizontal adjustment groove through bearings; Both ends of the vertical lead screw are respectively connected to the sliding frame and the bottom plate through bearings; Both ends of the bidirectional lead screw are respectively installed on both sides of the inner cavity of the spacing adjustment seat through bearings.

6. The eye movement measurement system according to claim 1, characterized in that, The first moving seat is slidably matched with the inner wall of the horizontal adjustment groove; A sliding track is arranged on the adjustment seat, and the sliding frame is movably matched with the sliding track; The third moving seat is movably matched with the inner wall of the spacing adjustment seat.

7. The eye movement measurement system according to claim 1, wherein, The eye movement detection device includes: two groups of adjusting rods, two groups of first connecting rods, two groups of second connecting rods and two groups of mounting rods; The adjusting rod is fixedly connected to the corresponding third moving seat, the bottom of the adjusting rod is rotationally matched with one end of the first connecting rod, the other end of the first connecting rod is rotationally connected to one end of the second connecting rod, the other end of the second connecting rod is rotatably installed with the mounting rod, a first camera is fixedly installed at the other end of the mounting rod, and a second camera is fixedly installed on the top surface of the first connecting rod.

8. The eye movement measurement system according to claim 7, characterized in that, The adjusting rod is fixedly connected to the third moving seat through a bolt, a rotating shaft is arranged at the bottom of the adjusting rod, and a rotating hole adapted to the rotating shaft is opened at one end of the first connecting rod.

9. The eye movement measurement system according to claim 8, characterized in that, The first connecting rod and the second connecting rod are connected through a rotating shaft and a rotating hole, and a locking nut is arranged on the rotating shaft.

10. The eye movement measurement system according to claim 9, characterized in that, The mounting rod and the second connecting rod are rotatably connected through a universal joint, and the universal joint allows the mounting rod to rotate in the horizontal and vertical directions.

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