Portable eye tracker auxiliary kit and portable eye tracker having the same

Abstract

The present invention discloses a portable eye tracker auxiliary kit and a portable eye tracker having the same. The auxiliary kit includes an automatically adjustable head support device, a portable eye tracker stand and a control system. A laptop computer or a desktop computer display can be used as a test machine, and different postures are adopted in the two cases. The head support device has a head support component, which can automatically adjust the height. The portable eye tracker stand includes: a stand base assembly, the stand base assembly includes movable legs on both sides, and the movable legs on both sides are respectively provided with a left leg rack and a right leg rack, and a synchronous gear is engaged with the two to realize the synchronization of the two movable legs moving toward / inversely; and a three-joint mechanical arm composed of an upper arm assembly, a lower arm assembly and a wrist assembly sequentially hinged to the stand base assembly, each joint only has the degree of freedom to rotate around its own rotation axis, and each has a driving device, and the overall posture can be adjusted as needed.

Description

Technical Field

[0001] The present invention belongs to the field of diagnosis / surgery / identification, and relates to related equipment for determining or recording eye movements, and in particular to a portable eye tracker auxiliary kit and a portable eye tracker having the same. Background Art

[0002] An eye tracker is a device that can track and measure eye position and eye movement information. It is widely used in the study of visual systems, psychology, and cognitive linguistics.

[0003] See also Fig.15 In the prior art, a portable eye tracker generally includes the following components: a laptop computer 4, a portable host computer (not shown), an eye tracker 3, a laptop stand 5, and response devices such as a key device.

[0004] The laptop computer is used as the test machine to present stimuli, the main test machine is used to run programs and process various types of data, the portable eye tracker is used to record the eye movement trajectory characteristics of the subjects when processing visual information, and independent or laptop integrated buttons, mice and other peripheral devices are used as response devices to obtain the subject's response or confirmation to the stimuli. The above hardware structures are all data connected.

[0005] See also Fig.16 A typical structure of a notebook stand 5 includes a left support leg 51, a right support leg 52, a stand body 53, a stand connector 54 and a clamping knob 55.

[0006] The bracket body 53 is in the shape of a rectangular strip as a whole, with a cavity 534 in the middle for accommodating the main connecting part 541 of the bracket connector 54; grooves 531 are provided at the bottom of both sides of the bracket body 53, and a plurality of positioning grooves 532 are provided in the grooves 531 at the same intervals.

[0007] The left support leg 51 includes a vertical section 511 and a left horizontal section 512 which are perpendicular to each other. The left horizontal section 512 has a hexagonal cross section, which matches the groove 531, and is provided with a notch 514 for the screw 513 to pass through and a groove 516 for accommodating the nut 515. The right support leg 52 is symmetrically arranged with the left support leg, but a protrusion 523 which can match the positioning groove 532 is arranged at the end of the horizontally arranged right horizontal section 522, and a through hole is provided at the connection between the horizontal section 522 and the vertical section 521 for the threaded rod of the clamping knob 55 to pass through. The bracket connector 54 is provided with a screw hole 542, which is fixed to the eye tracker 3 by screws.

[0008] The left side of the main connecting part 541 of the bracket connecting member 54 is connected to the bracket body 53 by a screw 543, and a hole for accommodating the screw 543 is correspondingly provided on the left side of the main connecting part 541. During installation, the main connecting part 541 is arranged behind the cavity 534 of the bracket body 53, and the bracket body 53 is connected to the left side of the main connecting part 541 by the screw 543. The clamping knob 55 has a knob portion 551 and a threaded rod 552, and the threaded rod 552 can pass through the holes on the right supporting foot 52 and the bracket body 53 to be threadedly connected to the right side of the main connecting part 541 of the bracket connecting member 54.

[0009] After the eye tracker 3 is installed, the laptop stand 5 clamps the C-surface of the laptop 4 with the left support leg 51 and the right support leg 52, and the clamping width and the angle of the eye tracker can be adjusted within a certain range. The adjustment method is as follows: for the clamping width, after the protrusion 523 of the right support leg 52 is inserted into the positioning groove 532 at the appropriate position at the bottom of the stand body 53, the screw 513 and the nut 515 on this side are locked. The left horizontal section 512 of the left support leg 51 has no protrusion at the end, and is locked with another screw 513 and nut 515 after sliding horizontally to an appropriate position; for the angle of the portable eye tracker, after the support legs on both sides are locked, the stand connector 54 is adjusted to the required angle, and the screw 543 and the clamping knob 55 are tightened to lock it with the stand body 53.

[0010] See also Fig.17 Another common situation is to use a desktop computer monitor as the test machine, and the eye tracker 3 is installed on a tripod 6. A typical structural example of the tripod 6 is shown in patent document CN204692962U. The tripod disclosed in the document is provided with an attachment element 61 connected to the eye tracker 3, and is provided with a plurality of support legs 62 that can be rotatably opened / closed and can adjust the length, a universal ball joint 63, and a stopper 64 to achieve the adjustment and locking of various heights and XYZ three-way rotation angles.

[0011] See also Fig.17 ,The application of lightweight head support 7 is also common, which can reduce the movement of the subject’s head, and can be applied to various occasions such as a laptop or desktop computer monitor as the subject.

[0012] The common lightweight head support 7 includes a head support 71, a height adjustment assembly 72, a base element 73 and a desktop fixing structure 74. The height adjustment assembly 72 includes a locking piece 721, an annular cone piece 723, a hollow tube 725 and a C-shaped piece 726. The rod body 711 at the lower part of the head support 71 is an optical axis, which can slide up and down in the hollow tube 725, and the outer side is sleeved with an annular cone piece 723 and a C-shaped piece 726 placed on the top of the hollow tube 725. The main body of the locking piece 721 is a hollow cylinder, with a conical mouth 722 at the upper part, an internal thread structure 724 at the inner side of the lower part, and a matching external thread at the upper end of the hollow tube 725. Two threaded rods are arranged at the bottom of the base element 73, and a manual nut 741 and a claw 742 are arranged on each threaded rod.

[0013] The height of the head support member 71 is adjusted by manually loosening the locking member 721, and the locking member 721 is tightened after it is in place, and the C-shaped member 726 is squeezed to shrink through the conical surface of the annular conical member 723 and the conical surface of the constriction 722, so as to lock the rod body 711 and the head support member 71, thereby achieving height fixation. Manually tightening / loosening the manual nut 741 on the desktop fixing structure 74 can achieve the fixation / release of the claw 742 and the test desktop.

[0014] The above kits and previous structures can meet the basic requirements of eye trackers, but there are still some shortcomings in the application scenarios of eye trackers, such as:

[0015] 1. The eye tracker should be horizontally centered relative to the laptop screen or desktop computer monitor. When the laptop stand is adapted to different laptop widths, the minimum adjustment unit of the right support foot 52 is the spacing of the positioning slots 532. The adjustment amount needs to be determined after measuring the overall width of the screen. At the same time, the adjustment requires loosening the screws 513 and nuts 515 first, making the centering adjustment inconvenient. In addition, the spacing adjustment will loosen the connection of the threaded rod 552 of the clamping knob 55, thereby invalidating the locking of the eye tracker angle. After the left and right support feet and the centering adjustment are completed, the portable eye tracker angle needs to be adjusted and locked again.

[0016] 2. In addition to the pitch movement relative to the horizontal edge of the laptop or desktop computer screen, the eye tracker does not require any other rotation in the horizontal or vertical plane. The structure of the laptop stand can prove this point. As a universal stand, the tripod stand has redundant degrees of freedom, which requires the portable eye tracker to take into account the adjustment of the horizontal height and horizontal rotation angle during the height and angle adjustment process, and this adjustment is generally inefficient.

[0017] 3. When using a desktop computer monitor, the subject's eye level should be flush with about one-quarter of the upper part of the monitor. Therefore, the height of the lightweight head support needs to be determined after measuring multiple dimensions such as the height of the vertical monitor screen and the subject's facial length (length from eyes to chin). Only after it is adjusted in place can the subsequent eye tracker position and angle be adjusted;

[0018] 4. Each step in the above structure is manually adjusted and cannot be linked, and the overall efficiency is low, which is particularly obvious when there are many types of subjects and multiple adjustments are required. Summary of the invention

[0019] The present invention provides a portable eye tracker auxiliary kit and a portable eye tracker having the same, aiming to solve at least one of the above-mentioned technical problems.

[0020] The present invention provides a portable eye tracker auxiliary kit and a portable eye tracker having the same, which can quickly and accurately find the best measurement posture no matter a desktop computer display or a notebook computer is used as a test machine.

[0021] In the first aspect, an auxiliary kit for a portable eye tracker includes a head support device, a portable eye tracker stand and a control system, wherein the portable eye tracker stand is used to support the eye tracker in front of a test machine, and the head support device includes: a base that is detachably mounted on an experimental desktop; a head support assembly, the head support assembly is located on the base, the head support assembly includes a chin rest adapted to the shape of the chin and a sliding column connected to the chin rest; a lifting control assembly, the lifting control assembly includes a sliding column lifting motor located in the base for driving the sliding column of the head support assembly to lift and lower; and a desktop locking assembly, the desktop locking assembly includes a locking claw guide rail extending from the bottom of the base and a locking claw located on the locking claw guide rail, the locking claw moves on the locking claw guide rail to achieve locking / relaxation of the head support device and the experimental desktop; a portable eye tracker stand, which includes a stand base assembly and a three-joint mechanical arm consisting of a large arm assembly, a small arm assembly and a wrist assembly, the stand base assembly, the large arm assembly, the small arm assembly, and the wrist assembly. The assembly and the wrist assembly are hinged in sequence, and the bracket base assembly includes a drive device installation part, legs symmetrically arranged along the vertical plane, and a right movable leg and a left movable leg that can freely shrink and adapt to the size of the actual machine along the width direction of the actual machine. The right movable leg is provided with a right leg rack, and the left movable leg is provided with a left leg rack. A synchronous gear meshing with the right leg rack and the left leg rack is arranged between the right leg rack and the left leg rack. When one or both of the left movable leg and the right movable leg are moved, the two are opened and closed synchronously and the moving distances are equal. The rotation axes of the upper arm assembly, the lower arm assembly and the wrist assembly are parallel to each other and are perpendicular to the vertical plane. The upper arm assembly, the lower arm assembly and the wrist assembly only have the degree of freedom to rotate around their respective rotation axes, and each has a drive device; and a control system, which is configured to calculate the target height of the chin rest and the target angles of the upper arm assembly, the lower arm assembly and the wrist assembly, adjust the chin rest to the target height, and adjust the upper arm assembly, the lower arm assembly and the wrist assembly to the target angle.

[0022] In some examples, a locking claw lifting motor disposed in the base drives the locking claw to move on a locking claw guide rail, and two locking claw guide rails are symmetrically disposed about a central symmetry plane of the head support device. A nut seat mounting hole and two guide through holes that slide with the locking claw guide rails are disposed on the locking claw. The nut seat mounting hole is mounted with a nut seat connected to the locking claw lifting motor, and the control system controls the locking claw lifting motor to achieve locking / relaxation of the locking claw and the experimental desktop.

[0023] In some examples, the base includes a hollow tube body, which can accommodate a sliding cylinder connected to the lower side of the chin rest. The outer circumferential surface of the sliding cylinder has a guide groove along the axial direction. A guide locking threaded hole is radially opened on the upper part of the cylindrical surface of the hollow tube body close to the subject. The guide locking piece is threadedly connected to the guide locking threaded hole. After the guide locking piece is screwed into the guide locking threaded hole, the distal end is inserted into the guide groove of the sliding cylinder.

[0024] In some examples, an image recognition device is provided on the outer circumferential surface of the hollow tube on the side close to the test machine, and the control system calculates a combination of one or more of the following information based on the image collected by the image recognition device: the front-to-back distance between the head support device and the portable eye tracker bracket, the front-to-back distance between the head support device and the screen of the test machine, the height of the screen, and the height of the bottom edge of the lower side of the screen from the desktop.

[0025] In some examples, both the right movable foot and the left movable foot are provided with positioning protrusions for clamping the edge of the laptop computer when the laptop computer is used as a test machine, and for entering a storage state when the laptop computer is not used as a test machine.

[0026] In some examples, the right horizontal section of the right movable foot and the left horizontal section of the left movable foot respectively have claws extending toward the back of the screen of the tested machine, and when a desktop computer monitor is used as the tested machine, the claws clamp the base of the monitor.

[0027] In some examples, the drive device mounting portion is U-shaped, and boom support bearings are symmetrically arranged on its two vertical side walls. The boom assembly includes a boom drive device and a boom left rod, a boom right rod and a boom shaping member that are separately arranged; the boom left rod, the boom right rod and the boom shaping member are connected to form an H-shaped structure, a boom left flange is installed on the left boom rod, and a boom right flange is installed on the right boom rod. The boom left flange and the boom right flange respectively cooperate with the inner rings of the boom support bearings installed on the two vertical side walls of the drive device mounting portion to support the H-shaped structure to rotate around the bracket base assembly, and the boom drive device is fixed on one of the vertical side walls of the drive device mounting portion to drive the H-shaped structure to rotate.

[0028] In some examples, the forearm assembly is driven by a forearm driving device to rotate around the hinge axis, and the wrist assembly is driven by a wrist driving motor arranged on the forearm assembly through a transmission chain to perform pitch motion.

[0029] In some examples, a wrist drive motor disposed on the forearm assembly drives the wrist assembly to perform pitch motion via a transmission chain.

[0030] In a second aspect, a portable eye tracker includes an eye tracker and the auxiliary kit.

[0031] Thus, the present invention can achieve the following beneficial effects:

[0032] 1. The centering adjustment of the portable eye tracker stand is simple: the moving distance of the left and right movable legs is the same, which can achieve synchronization of opposite / reverse movement; the setting of the left and right leg claws makes it easy to achieve centering when using a desktop computer monitor as the test machine;

[0033] 2. The portable eye tracker stand does not have any extra rotational freedom, and the centering adjustment is independent of the height and pitch angle adjustment of the eye tracker, with high overall adjustment efficiency;

[0034] 3. The portable eye tracker stand realizes the integration of different stands in two modes: laptop and desktop computer monitor, which reduces the number of parts carried by the user and reduces the difficulty of assembly;

[0035] 4. The head support device and the portable eye tracker bracket are linked through a control system, and the posture can be adjusted automatically or manually by the user, which is efficient and convenient when making multiple adjustments. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the overall structure of the present invention when applied to a notebook computer;

[0037] Figure 2 It is a schematic diagram of the overall structure of the present invention when applied to a desktop computer display;

[0038] Figure 3 is a structural exploded view of the head support device of the present invention;

[0039] Figure 4 It is a schematic diagram of the overall structure of the portable eye tracker stand of the present invention;

[0040] Figure 5 is an exploded view of the base assembly of the portable eye tracker stand of the present invention;

[0041] Figure 6 It is a schematic diagram of the adjustment range of the base assembly of the portable eye tracker stand of the present invention;

[0042] Figure 7 is an exploded view of the upper arm assembly of the portable eye tracker stand of the present invention;

[0043] Figure 8 The present invention Figure 7 Middle AA rotated section view;

[0044] Fig. 9 It is an exploded view of the forearm assembly and the wrist assembly of the portable eye tracker stand of the present invention;

[0045] Fig.10 The present invention Fig. 9 Middle BB section view;

[0046] Fig.11 It is a schematic diagram of the structure of the wrist transmission pinion of the portable eye tracker stand of the present invention;

[0047] Fig.12 The present invention Fig.10 Schematic diagram of the middle C direction;

[0048] Fig.13 Schematic diagram of two postures of the portable eye tracker stand of the present invention;

[0049] Fig.14 is a schematic diagram of a target posture of a portable eye tracker auxiliary kit of the present invention;

[0050] Fig.15 It is a schematic diagram of the overall structure of a portable eye tracker kit in the prior art;

[0051] Fig.16 It is a schematic diagram of the overall structure of a notebook stand in the prior art;

[0052] Fig.17 It is a schematic diagram of the overall structure of a tripod and a lightweight head support in the prior art. DETAILED DESCRIPTION

[0053] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. "First", "second" and similar words do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. The coordinate system indicating the orientation is given in the drawings of the specification.

[0054] See also Figure 1 , Figure 2 The auxiliary kit of the portable eye tracker of the present invention includes an automatically adjustable head support device 1, a portable eye tracker bracket 2 and a control system (not shown). A laptop computer or a desktop computer monitor can be used as a test machine, and the portable eye tracker bracket 2 adopts different postures in two cases.

[0055] like Figure 3 As shown, the head support device 1 comprises a head support component 11 , a base 12 , a lifting control component 13 and a desktop locking component 14 .

[0056] The head support assembly 11 has a chin rest 111 adapted to the shape of the human chin, and the chin rest 111 is connected to a sliding cylinder 113 through a connecting element 112. The connecting element can be a threaded structure or a snap-on structure. The main body of the sliding cylinder 113 is a hollow cylinder, and the outer cylindrical surface has a guide groove 114 along the generatrix direction; the internal cavity can accommodate and position the protruding structure of the nut seat 115, the outer diameter of the sliding cylinder 113 is not less than the outer diameter of the nut seat, and the bottom is provided with a mounting hole for connecting the screw on the nut seat 115.

[0057] The base 12 includes a hollow tube 121 and a base 122 for accommodating the sliding column 113 to move up and down.

[0058] The hollow tube 121 has a threaded hole 123 on the cylindrical surface near the subject. The guide locking member 124 is a screw with a handle, which is inserted into the guide groove 114 of the sliding cylinder 113 when screwed into the threaded hole 123. When the screwing depth is shallow, the end of the screw does not squeeze the guide groove 114, thereby guiding the sliding cylinder 113 to rise and fall. After the sliding cylinder 113 is lifted and lowered into place, the guide locking member 124 is tightened so that its end face is in close contact with the guide groove 114, thereby locking the position of the sliding cylinder 113. In some embodiments, structures such as staggered teeth, protrusions and grooves can be provided on the end face of the guide locking member 124 and the guide groove 114 to enhance the locking effect; or the guide locking member 124 is a latch, and a plurality of slots are provided at intervals on the sliding cylinder 113, and the latch is inserted into the slot to lock the position of the sliding cylinder 113.

[0059] In some embodiments, an image recognition device 125 is provided on the cylindrical surface of the hollow tube 121 close to the side of the tested machine, which can obtain parameters such as the distance between the head support assembly 11 and the tested machine screen, the horizontal height relative to the top of the screen, the inclination angle of the screen, etc. through image recognition. The image recognition device 125 can be a camera. Camera distance measurement and angle measurement (detection of parameters such as the distance between the head support assembly 11 and the tested machine screen, the horizontal height relative to the top of the screen, the inclination angle of the screen, etc.) are conventional technologies.

[0060] The base 122 is fixedly connected to the hollow tube 121, and has a cavity 127 inside for accommodating the sliding column lifting motor 131 of the lifting control assembly 13 and the locking claw lifting motor 141 of the desktop locking assembly 14. The connecting portion between the hollow tube 121 and the base 122 is provided with an installation positioning structure 126 of the sliding column lifting motor 131 and corresponding screw holes.

[0061] The lifting control assembly 13 includes a sliding column lifting motor 131, which adopts a ball screw stepping motor.

[0062] The desktop locking assembly 14 includes a locking claw lifting motor 141, a base bottom cover 142, a locking claw guide rail 144, and a locking claw 145. The locking claw lifting motor 141 adopts a ball screw stepper motor. The base bottom cover 142 is provided with an opening and a screw hole for the locking claw lifting motor 141 to be installed and positioned, and a guide rail mounting threaded hole 143 for the end of the locking claw guide rail 144 to be installed. A plurality of screw holes for connecting with the base 122 are arranged around the base bottom cover 142. The upper end of the locking claw guide rail 144 is provided with a thread, and the lower end is an optical axis. The locking claw is a J-shaped structure as a whole, and a locking claw lifting motor nut seat mounting hole 146 and a corresponding threaded hole are arranged on the front side, and two guide through holes 147 that cooperate with the lower optical axis of the locking claw guide rail 144 are arranged in the middle. The connecting line of the locking claw lifting motor nut seat mounting hole 146 and the axes of the two guide through holes 147 in the horizontal section forms an isosceles triangle, so that when the two locking claw guide rails 144 are close to the edge of the desktop, the head support device 1 can be ensured to be oriented in a direction perpendicular to the desktop.

[0063] In some embodiments, the sliding column lifting motor 131 and the locking claw lifting motor 141 may also be a combination of a stepping motor, a coupling, and a ball screw; whether the locking claw 145 is in place may be determined by the motor current, the moving distance, etc. The desktop locking assembly 14 may also be a manual form in the background art, in which case the base 122 structure may be designed to be more compact.

[0064] Figure 4 Schematic diagram of the overall structure of the portable eye tracker bracket 2 of the present invention. Figure 4 As shown, the main body of the portable eye tracker stand 2 is a three-joint mechanical arm, including a stand base assembly 21, a large arm assembly 22, a small arm assembly 23 and a wrist assembly 24.

[0065] Figure 5 The exploded view of the base assembly 21 of the portable eye tracker stand 2 is Figure 4 The direction of looking up. Figure 5 The bracket base assembly 21 includes a bracket base 2101, and the bracket base 2101 includes a drive device mounting portion 2102, a support foot portion 2103, a right movable support foot 2104, a synchronous gear 2105, a left movable support foot 2106 and a base cover 2107.

[0066] The main body of the drive device installation part 2102 is U-shaped in the front view reference plane, and its two vertical side walls are symmetrically provided with positioning holes 2108, drive device output shaft through holes 2109, drive device installation holes 2110 and arm support bearing installation holes 2111 for installation of the small arm drive device 2139 and the large arm drive device 2140. Both the small arm drive device 2139 and the large arm drive device 2140 use stepper motors with integrated reducers. There are four drive device installation holes 2110 evenly distributed along the circumference. Figure 5 , Figure 7 and Fig.13 The two vertical side walls of the drive device mounting portion 2102 are tilted downward toward the rear side as a whole, so that the wrist assembly 24 has a larger angle adjustment space when it is in a low position after the eye tracker 3 is assembled.

[0067] The support leg portion 2103 is in an inverted U shape in the reference plane (horizontal plane) viewed from above, and has two symmetrically arranged support legs 2112 and a horizontal section 2113 connecting the two support legs 2112. The two support legs 2112 are in an elongated strip shape and extend forward in a direction perpendicular to the horizontal section 2113. The horizontal section 2113 rises relative to the support legs 2112, so that the base cover 2107 covers the horizontal section 2113, and the cover 2107 is flush with the support legs 2112. The middle part of the horizontal section 2113 has a main groove 2114, which can accommodate the main parts of the right movable leg 2104 and the left movable leg 2106; the rear edge has two symmetrically arranged claw grooves 2115; the center has a first stepped hole 2116 for mounting and positioning the synchronous gear 2105; the left rear corner (towards one end of the left movable leg 2106) is provided with a buffer mounting boss 2119 and an avoidance groove 2117 for mounting the leg buffer 2118, the outer periphery of the leg buffer 2118 is fully threaded, and can be adjusted through the threaded holes provided in the buffer mounting boss 2119 The front side wall of the buffer mounting boss 2119 and the front side wall of the main groove 2114 guide the main body of the left movable leg 2106; a guide boss 2120 is provided at the right front corner (the part close to the leg 2112 on one end facing the right movable leg 2104), and the guide boss 2120 and the rear side wall of the main groove 2114 guide the main body of the right movable leg 2104; semi-cylindrical protrusions 2121 are provided on both the left and right sides of the main groove 2114, serving as guides and limit stops inside the right movable leg 2104 and the left movable leg 2106. The horizontal section 2113 is provided with a threaded hole for installing a spring fixing screw 2122 between the guide boss 2120 and the front side wall of the main groove 2114.

[0068] The right movable leg 2104 and the left movable leg 2106 are both L-shaped as a whole. The right movable leg 2104 has a right leg vertical section 2123 and a right leg horizontal section 2124, and the left movable leg 2106 has a left leg vertical section 2134 and a left leg horizontal section 2132. The bottom surfaces of the right leg vertical section 2123 and the left leg vertical section 2134 are flush with the bottom surface of the leg 2112, so that the bottom surfaces are at the same level, and the bottom surfaces of the right leg vertical section 2123 and the left leg vertical section 2134 are both provided with a plurality of positioning protrusions 2125, which are used to clamp the edge of the laptop computer when the laptop computer is used as a test machine, and can enter the storage state when the laptop computer is not used as a test machine so as not to affect the level of the bottom surface of the bracket base assembly 21. In some embodiments, the positioning lug 2125 is hinged with the right leg vertical section 2123 and the left leg vertical section 2134 along the axis of the front-back direction, and can be flipped to a vertical state when in use, and can be positioned by relying on the step surface on the hinge side, and flipped into the accommodating groove in the storage state; in other embodiments, the upper part of the positioning lug 2125 can also be provided with a structure such as a push-type ballpoint pen head to achieve a method of pressing and protruding when in use and returning in the storage state; in other embodiments, a through groove can be provided in the right leg vertical section 2123 and the left leg vertical section 2134, and the positioning lug 2125 can be provided as an independent insert matching the through groove, which can be inserted in use and taken out in the storage state. In short, the connection method between the positioning lug 2125 and the right leg vertical section 2123 and the left leg vertical section 2134 can adopt any existing technology.

[0069] The right support leg horizontal section 2124 of the right movable support leg 2104 has a right support leg sliding notch 2126, the middle part of which protrudes backward to form a right support leg claw 2127, and the left side has a right support leg rack 2128. The left support leg horizontal section 2132 of the left movable support leg 2106 has a left support leg sliding notch 2133, the middle part of which protrudes backward to form a left support leg claw 2130, and the right side has a left support leg rack 2129. The left support leg claw 2130 is also provided with a rack avoidance groove 2131 for avoiding the right support leg rack 2128, and its size is set so that the left movable support leg 2106 can pass through the buffer mounting boss 2119 when sliding to the left limit position. The right supporting leg claw 2127 and the left supporting leg claw 2130 can slide in the claw grooves 2115 on both sides of the horizontal section 2113 respectively. Gaskets are provided on the bottom surfaces of the ends of the two claws to make them flush with the bottom surface of the supporting leg 2112.

[0070] One end of the support leg reset spring 2135 is connected to the spring fixing screw 2122, and the other end is connected to the right end of the left support leg rack 2129 (the end facing the right support leg vertical section 2123), so that the right movable support leg 2104 and the left movable support leg 2106 maintain a tendency to move toward each other. The support leg buffer 2118 can contact the end surface of the right support leg rack 2128 (the end surface facing the left support leg vertical section 2134) when the two support legs are reset, so as to achieve motion buffering at the end of the stroke to avoid damage caused by collision impact.

[0071] The synchronous gear 2105 comprises a spur gear, and a stepped shaft and a rotating shaft are arranged on the upper and lower sides.

[0072] The right support leg rack 2128, the synchronous gear 2105, and the left support leg rack 2129 are meshed together. When one or both sides of the support leg are stretched, the movement distance of both sides is the same, and the synchronization of the two racks moving toward / against each other can be achieved. This feature makes it unnecessary to set the support leg return spring 2135 and the support leg buffer 2118 on the same support leg side, making the overall layout more reasonable, and at the same time it can also stably ensure the centering of the bracket when in use.

[0073] In addition, the monitor of a desktop computer usually has a base, a support frame and other structural arrangements that are symmetrically arranged about the central axis. Therefore, when using the desktop computer monitor as the test machine, the right leg claw 2127, the left leg claw 2130 and the outer side wall of the horizontal section 2113 of the leg part 2103 are used to clamp the edge of the above-mentioned symmetrical structure, so that the auxiliary kit of the portable eye tracker of the present invention can also achieve the convenience of centering in this application.

[0074] In some embodiments, the two legs 2112, the right leg vertical section 2123, and the left leg vertical section 2134 may also extend backward or forward and backward at the same time. The left-right spacing and the total length of the front-back dimensions of the two legs 2112, the right leg vertical section 2123, the left leg vertical section 2134, the right leg claw 2127, and the left leg claw 2130 are set to cover the range of variation of the center of gravity of the portable eye tracker stand 2 in the normal setting activity space, so that the whole is stable in use.

[0075] The base cover plate 2107 is rectangular in shape as a whole, and the left and right sides are provided with first sliding positioning protrusions 2136 matching the right support leg horizontal section 2124, the left support leg horizontal section 2132 and the semi-cylindrical protrusion 2121, which press the left and right support leg horizontal sections in the up-down direction; the middle part is provided with a second sliding positioning protrusion 2137, which can be inserted into the main groove 2114 in the front-back direction, and press the right support leg rack 2128 and the left support leg rack 2129 in the up-down direction; the center of the second sliding positioning protrusion 2137 is provided with a bottom side stepped hole, which cooperates with the first stepped hole 2116 to realize the installation and positioning of the synchronous gear 2105. Screw holes and screw structures are arranged around the first sliding positioning protrusion 2136 and the second sliding positioning protrusion 2137 to realize the fixation of the base cover plate 2107 and the support leg horizontal section 2113, while taking into account the pressing and holding of the sliding. A mounting positioning protrusion 2138 is also provided on the front side of the middle portion of the base cover 2107 to achieve positioning when fixed with the horizontal section 2113 of the support leg.

[0076] Figure 6 The schematic diagram of the adjustment range of the base assembly of the portable eye tracker stand of the present invention is shown, and the base cover plate 2107 has been hidden. The lower solid line view is a retracted state, the leg return spring 2135 and the leg buffer 2118 are in a retracted state, and the right leg claw 2127 and the left leg claw 2130 are respectively close to the side of the two claw grooves 2115 close to the center line; the upper dotted line view is a stretched state, the leg return spring 2135 and the leg buffer 2118 are in an extended state, the right leg claw 2127 and the left leg claw 2130 are respectively close to the side of the two claw grooves 2115 away from the center line, and the right leg sliding notch 2126 and the left leg sliding notch 2133 are respectively in contact with the semi-cylindrical protrusion 2121.

[0077] Figure 7 This is an exploded view of the upper arm assembly of the portable eye tracker stand of the present invention. In order to make the structure more clearly displayed, some parts have been made transparent. Figure 8 yes Figure 7 AA rotated section view.

[0078] like Figure 7-8 As shown, the boom assembly 22 includes a boom left rod 2202, a boom left flange 2203, a forearm drive member 2204, a forearm drive connecting shaft 2205, a forearm keyless bushing 2206, a forearm connecting rod 2207, a boom shaping member 2210, a boom right flange 2212 and a boom right rod 2213.

[0079] As mentioned above, both vertical side walls of the drive device mounting portion 2102 of the bracket base 2101 are provided with upper arm support bearing mounting holes 2111, and one upper arm support bearing 2201 is installed on each side.

[0080] The main body of the left arm rod 2202 is a flat long rod. The side connected to the arm support bearing 2201 is provided with a second stepped hole 2214 to accommodate the mounting surface of the left arm flange 2203. The side connected to the small arm assembly 23 is provided with a third stepped hole 2215. The third stepped hole 2215 is used to mount the small arm connecting left bearing 2216. The left arm flange 2203 is a "convex" shaped part. The center is provided with a small arm output shaft through hole 2218, whose inner diameter is larger than the output shaft diameter of the small arm drive device 2139. Figure 8 After being fixedly connected to the left arm member 2202 with screws, the protruding portion 2217 of the left flange of the arm passes through the second stepped hole 2214 and cooperates with the inner ring of the arm support bearing 2201 on that side.

[0081] The arm driving member 2204 is a short connecting rod, one end of which is provided with an arm driving shaft hole 2219, and the arm keyless bushing 2206 is installed in the hole to expand and lock the output shaft of the arm driving device 2139 and the arm driving member 2204; the other end of the arm driving member 2204 is provided with an arm driving connecting shaft through hole 2220. The arm connecting rod 2207 is a slender rod-shaped connecting member, and each end is provided with a connecting through hole 2221, and the distance between the axes of the two connecting through holes 2221 is equal to the distance between the axes of the second stepped hole 2214 and the third stepped hole 2215 of the left arm rod 2202. The arm driving connecting shaft 2205 is a stepped shaft, which passes through the arm driving connecting shaft through hole 2220 and cooperates with the inner ring of the arm connecting rod bearing 2208 provided in the connecting through hole 2221 at one end of the arm connecting rod 2207, and a thread is provided at its end. The arm drive connecting shaft cover 2209 is threadedly connected to the end and axially locks the arm connecting rod bearing 2208.

[0082] The main body of the right arm member 2213 is a flat long rod, with circular bosses at both ends. The boss connected to the side of the boom drive device 2140 is provided with a fourth step hole 2223, which can accommodate the keyless bushing 2211 of the boom and the right flange 2212 of the boom. The boss connected to the side of the small arm assembly 23 is provided with a fifth step hole 2224, and the five-step hole 2224 is used to install the right bearing 2225 of the small arm connection. The distance between the fourth step hole 2223 and the fifth step hole 2224 is equal to the distance between the second step hole 2214 and the third step hole 2215 of the left arm member 2202. The right flange 2212 of the boom has the same structure as the left flange 2203 of the boom, and its inner diameter is larger than the output shaft diameter of the boom drive device 2140. See Figure 8 After being fixedly connected to the right arm member 2213 with screws, the protruding portion of the right arm flange 2212 passes through the fourth stepped hole 2223 and cooperates with the inner ring of the arm support bearing 2201 on this side. The keyless arm bushing 2211 is installed in the fourth stepped hole 2223, and the right arm member 2213 and the output shaft of the arm drive device 2140 are locked by expansion.

[0083] A big arm shaping member 2210 is also provided between the big arm left rod 2202 and the big arm right rod 2213. Two cylindrical protrusions 2222 are respectively provided at both ends of the big arm shaping member 2210, which are matched with the holes provided on the big arm left rod 2202 and the big arm right rod 2213, respectively, and are locked by fasteners such as screws, spring washers, and gaskets.

[0084] The left arm rod 2202, the right arm rod 2213 and the arm shaping member 2210 in the arm assembly 22 form an H-shaped structure as a whole, and the left arm flange 2203, the right arm flange 2212 and the arm support bearing 2201 form the axis of rotation of the H-shaped structure around the support base assembly 21. The above combination arrangement allows the weight of the arm assembly 22 and the small arm assembly 23, the wrist assembly 24 and the eye tracker connected thereto to act directly on the support base assembly 21, so that the arm drive device 2140 can only output torque to drive the H-shaped structure to swing, avoiding it from being subjected to radial bending moment during driving. At the same time, see Figure 7 As shown in the exploded view, the split setting of the H-shaped structure ensures the convenience of assembling the big arm assembly 22.

[0085] Fig. 9 It is an exploded view of the forearm assembly 23 and the wrist assembly 24 of the portable eye tracker stand of the present invention. Fig.10 yes Fig. 9 Middle BB section view.

[0086] like Figure 9-10 As shown, the forearm assembly 23 includes a forearm housing 2301, a wrist drive motor 2302, a wrist transmission pinion 2303, a wrist transmission gearwheel 2304, a wrist keyless bushing 2305, a forearm housing cover 2306, a wrist motor reducer 2307, a connecting seat 2308, a coupling 2309, a wrist drive shaft 2310, a wrist drive shaft bearing 2311, a bearing support cylinder 2312, a wrist first bevel gear 2313, a forearm sleeve 2314 and a wrist housing 2315.

[0087] The forearm box 2301 is a hollow rectangular box as a whole, and the partition 2316 divides it into a gear chamber 2317 and a drive device installation chamber 2318. The wrist drive motor 2302 and the wrist motor reducer 2307 are adjacent and are both installed on the partition 2316 by screws. The output shaft of the wrist drive motor 2302 passes through the partition 2316 and is locked and connected with the wrist transmission pinion 2303. The input shaft of the wrist motor reducer 2307 passes through the partition 2316 and is tightly connected with the wrist transmission gear 2304 through the wrist keyless bushing 2305. The wrist transmission pinion 2303 is meshed with the wrist transmission gear 2304 for transmission, and the torque output by the wrist drive motor 2302 is transmitted to the wrist motor reducer 2307.

[0088] See also Fig.11 The wrist transmission pinion 2303 has a C-shaped boss 2322 on the side, and a 1 / 4 circular cutting groove 2323 is set at the root to form a cantilever part 2324. The cantilever part is relatively buckled by a screw thread fastening structure, thereby achieving a fastening connection with the output shaft of the wrist drive motor 2302. Correspondingly, the upper and lower sides of the small arm box 2301 are respectively provided with operating holes 2325 for tightening the screws.

[0089] A stepped shaft-shaped right connecting boss 2319 is arranged on the right side of the forearm housing 2301, and a stepped shaft-shaped left connecting boss 2320 and a forearm connecting boss 2321 are arranged on the left side. The right connecting boss 2319 cooperates with the inner ring of the forearm connecting right bearing 2225; the axis of the left connecting boss 2320 coincides with the axis of the right connecting boss 2319, and cooperates with the inner ring of the forearm connecting left bearing 2216; the forearm connecting boss 2321 cooperates with the inner ring of the forearm connecting rod bearing 2208, and a thread is arranged at the end, and the axial locking of the forearm connecting rod bearing 2208 is realized through the forearm connecting boss cover 2326. The step size of the right connecting boss 2319 and the left connecting boss 2320 is set so that the center line of the reducer is located on the symmetrical plane in the left and right directions of the portable eye tracker bracket 2, so as to ensure that the eye tracker is centered after final installation. At the same time, the arm transmission chain including the arm connecting rod 2207 and the wrist drive motor 2302 are located on both sides of the center line, respectively, and the layout and weight distribution are more balanced. In addition, the distance between the axis of the left and right connecting bosses 2320, 2319 and the arm connecting boss 2321 is equal to the distance between the axis of the aforementioned arm drive shaft hole 2219 and the arm drive connecting shaft through hole 2220. Therefore, the connecting line of the intersection of the above four axes and the right viewing reference plane forms a parallelogram, so that the rotation of the arm drive member 2204 can be converted into the swing of the arm assembly 23 (see Figure 4 , Fig.13 ).

[0090] In some embodiments, the forearm driving member 2204, the forearm connecting rod 2207, the forearm connecting boss 2321 and related accessories such as bearings can be omitted, and the forearm driving device 2139 is set on the rotation axis of the forearm assembly 23 to directly drive the forearm assembly 23 to rotate.

[0091] The output shaft of the wrist motor reducer 2307 is connected to the wrist drive shaft 2310 through the coupling 2309, and the torque is transmitted to the wrist first bevel gear 2313 connected to the front end of the wrist drive shaft. The forearm sleeve 2314 is fixedly connected to the wrist motor reducer 2307 through the connecting seat 2308. In some embodiments, a positioning structure additional to the connecting seat 2308 and the forearm housing 2301 can also be provided. A cavity for accommodating the coupling 2309 is provided on the rear side of the forearm sleeve 2314, and a stepped hole for accommodating two relatively arranged wrist drive shaft bearings 2311 is provided in the middle. The shaft diameter of the wrist drive shaft 2310 is gradually reduced from the back to the front, and a bearing support cylinder 2312 is also provided on the outside of the shaft section passing through the two wrist drive shaft bearings 2311 to support the inner rings of the two wrist drive shaft bearings 2311. See Fig.12 A rectangular section 2327 is provided at the front end of the wrist driving shaft 2310 to cooperate with the first bevel gear 2313 of the wrist to transmit torque, and an annular groove 2328 is provided to install a retaining spring to achieve axial positioning of the first bevel gear 2313 of the wrist.

[0092] The wrist assembly 24 includes a wrist frame 2401 , a wrist bearing 2402 , a wrist second bevel gear 2403 , a wrist balancing shaft 2404 and a fixing knob 2405 .

[0093] The front part of the wrist housing 2315 is hollow cylindrical, which can accommodate the meshing first bevel gear 2313 and the second bevel gear 2403 of the wrist. A stepped hole is provided on each of the left and right sides to install the wrist bearing 2402. The rear part is hollow rectangular, and the left and right sides of the rear part are connected to the front part of the forearm sleeve 2314 through screws and locating pin structures (not shown in the figure).

[0094] The wrist frame 2401 is H-shaped, and the boss of the second bevel gear 2403 of the wrist passes through the wrist bearing 2402 on one side of the wrist housing 2315 and is fixedly connected to the rear part of the wrist frame 2401 on that side by screws and pins; the wrist balance shaft 2404 is inserted into the rear part of the wrist frame 2401 on that side from the other side, and is fixedly connected to the wrist frame 2401 by screws, and cooperates with the inner ring of the wrist bearing 2402 on that side of the wrist housing 2315. The above arrangement supports both sides of the wrist rotation axis. During assembly, the wrist housing 2315 and the wrist bearings on both sides can be assembled first, and then the second bevel gear 2403 of the wrist, the wrist frame 2401, and the wrist balance shaft 2404 can be assembled in sequence, and then the subassembly and the forearm subassembly are assembled.

[0095] The fixing knob 2405 can be connected and positioned with the connection hole below the eye tracker 3. A corresponding positioning structure is provided on the mating surface on the front side of the wrist assembly 24.

[0096] By means of the above structure, the upper arm driving device 2140 can drive the upper arm assembly 22 to rotate around the axis of its output shaft, and the lower arm driving device 2139 can drive the lower arm driving member 2204 to rotate around the output axis, thereby pushing the lower arm connecting rod 2207 and the lower arm connecting boss 2321, so that the lower arm assembly 23 rotates around the axis of the left connecting boss 2320 and the right connecting boss 2319, and the wrist driving motor 2302 can drive the wrist assembly 24 to rotate around the axis of the second wrist bevel gear 2403 through the transmission chain formed by the wrist transmission pinion 2303, the wrist transmission gear 2304, the wrist motor reducer 2307, the wrist driving shaft 2310, the wrist first bevel gear 2313 and the wrist second bevel gear 2403, so as to complete the pitch angle adjustment of the eye tracker 3 connected thereto.

[0097] The purpose of setting the drive device installation cavity 2318 of the wrist transmission pinion 2303, the wrist transmission gear 2304 and the small arm box 2301 is to make the front-to-back dimensions of the portable eye tracker bracket 2 compact. In some embodiments, a stepper motor or servo motor with or without a reducer can be used directly as the drive device of the wrist drive shaft 2310.

[0098] Fig.13 The diagram is a schematic diagram of two postures of the portable eye tracker stand of the present invention. The left side is a schematic diagram of the posture when the tested machine is a laptop computer, and the right side is a schematic diagram of the posture when the tested machine is a desktop computer monitor. When corresponding to monitors of different heights, the posture of the portable eye tracker stand can be adjusted.

[0099] The auxiliary kit of the portable eye tracker of the present invention also has a control system (not shown). The control system includes: a controller; and a driving circuit for driving the motors of the head support device 1 and the portable eye tracker bracket 2 .

[0100] The control system can obtain and control the height of the head support component 11 and the desktop locking component 14, the rotation angle of the upper arm component 22, the lower arm driving component 2204, and the wrist frame 2401, and can adopt open-loop or closed-loop control. Under open-loop control, each component can be initialized by returning to zero point and then moving to the set position. Under closed-loop control, the height and rotation angle are obtained by using existing technologies. For example, the height can be measured by a displacement sensor, a grating ruler, a reflection ranging sensor, etc., and the rotation angle can be measured by an absolute encoder, an angle sensor, a circular grating, etc. The control system also has an input device, and the user can input the type of the subject, such as adults and children, the type of screen, such as a laptop computer, a desktop computer display, and its height, and the forward and reverse rotation angle or number of turns of each motor of the portable eye tracker bracket 2. In some embodiments, the control device can also automatically determine the type of the subject, the screen height, the distance and other information based on the picture obtained by the image recognition device 125. In some embodiments, the control system includes a software system configured on a computer, and the input device is an input peripheral of the computer, such as a keyboard, a mouse, etc. The input peripheral is used to input the above information into the software system, and the software system controls the motors of the head support device 1 and the portable eye tracker stand 2 through the drive circuit based on the information input by the user. It should be noted that the input device can also be an independent configuration of the auxiliary kit of the portable eye tracker of the present invention, such as a terminal with a display screen, and the controller and the drive circuit can also be integrated in the terminal, and the head support device 1 and the portable eye tracker stand 2 are controlled by the terminal.

[0101] See also Fig.14 The following is an explanation of the specific usage of the auxiliary kit of the portable eye tracker of the present invention using a desktop computer display screen as the test machine:

[0102] Step 1: Preparation: adjust the locking claw 145 of the head support device 1 to a position that can clamp the experimental desktop, make the locking claw guide 144 of the head support device 1 close to the edge of the experimental desktop, make the chin support 111 symmetrical about the vertical symmetry plane of the test machine screen in the left and right directions, and determine the front-to-back distance L1 between the head support device 1 and the test machine screen, and lock the locking claw 145; assemble the portable eye tracker bracket 2 and the eye tracker 3, adjust the front-to-back direction of the portable eye tracker bracket 2 to a suitable position, determine the front-to-back distance L2 between the head support device 1 and the rotation axis of the upper arm of the bracket 2, and use the bracket base assembly 21 of the portable eye tracker bracket 2 to adjust the left-to-right direction position of the eye tracker 3, so that the eye tracker 3 is symmetrical about the vertical symmetry plane of the test machine screen in the left-to-right direction;

[0103] Step 2: Obtain the current posture information of the head support device 1 and the portable eye tracker bracket 2: including the height dimension of the current position of the chin rest 111, and the current angles of the upper arm component 22, the lower arm component 23 and the wrist component 24;

[0104] Step 3: Calculate the target posture: In the target posture, the subject's eyes should be level with the upper edge of the display screen, about one-quarter of the height below. The eye tracker should face the subject's eyeballs, maintaining an appropriate distance d, and its vertical position should be as high as possible without affecting the subject's line of sight.

[0105] In this step, the control system (controller or computer software system, the same applies below) can obtain the necessary information for solving the target posture: the type of subject, such as adults and children. The control system can store the corresponding data of the morphological face length g of different subject types, and the data can also be input by the user through the input device; the screen type, such as laptop computer and desktop computer display, the height H1 of the bottom edge of the screen point C from the desktop, and the distance between the bottom edge of the screen point C and the top edge point D, that is, the screen height H2;

[0106] The distances L1, L2, heights H1, H2 are input by the user, or calculated by the control system based on the image acquired by the image recognition device 125, or acquired by correspondingly arranged sensors;

[0107] Step 4: Solving and adjusting: The target posture is Fig.14 The geometric expression in is:

[0108] (1) The subject's eye level should be about one-quarter the height of the upper part of the display: the subject's eyeball is point A, the viewpoint on the screen is E, the subject's horizontal line of sight AE is horizontal; the distance DE is about 0.25×H2; therefore:

[0109] H3=H1+0.75×H2-g;

[0110] (2) The eye tracker is facing the subject's eyeball: the center point of the front plane of the eye tracker is G, the vertex of the upper edge of the front plane is F, and the line AG is perpendicular to the line GF;

[0111] Keep an appropriate distance d between the eye tracker and the subject's eyeball: in normal mode (relative to the remote mode of the eye tracker), d is about 45cm;

[0112] The eye tracker is positioned as high as possible without affecting the subject's line of sight: point F is no higher than the line connecting points A and C.

[0113] At the same time, the control system stores the following parameters determined based on the hardware structure of the portable eye tracker and the bracket 2: the height e from the rotation axis of the upper arm assembly 22 to the test tabletop, the distance from the rotation axis of the upper arm assembly 22 to the rotation axis of the lower arm assembly 23, that is, the upper arm length a, the distance from the rotation axis of the lower arm assembly 23 to the rotation axis of the wrist assembly 24, that is, the lower arm length b, the distance h from the rotation axis of the wrist assembly 24 to the top surface of the eye tracker, and the distance w from the rotation axis of the wrist assembly 24 to the front plane of the eye tracker.

[0114] The control system solves the target height H3 of the head support device 1 and the rotation angle θ1 of the upper arm assembly 22, the rotation angle θ2 of the lower arm assembly 23, and the rotation angle θ3 of the wrist assembly 24 of the portable eye tracker bracket 2 based on the above information, and further calculates the conversion steps from the current posture to the target posture, and controls the corresponding drive device to adjust into place.

[0115] When the subject or the type of machine being tested is adjusted during the experiment, steps 2-4 can be repeated. The posture of each joint can also be adjusted manually by the user.

[0116] In some embodiments, only one of the head support device 1 and the portable eye tracker stand 2 of the present invention may be used, and at the same time, the control system obtains the corresponding required data: for example, when only the head support device 1 is used, the height dimension of the current position of the chin rest 111, the type of subject and corresponding data, the screen type, such as a laptop computer, a desktop computer monitor, and its height, distance and other information can be obtained; the image recognition device 125 can also be used to determine whether the centering / angle / height of, for example, the tripod stand 6 in the prior art meets the requirements, and a prompt can be issued in a timely manner; if only the portable eye tracker stand 2 is used, the target rotation angle of the upper arm assembly 22, the lower arm assembly 23 and the wrist assembly 24 can be solved according to the obtained eyeball / pupil position of the subject, or the rotation angle of the upper arm assembly 22, the lower arm assembly 23 and the wrist assembly 24 can be adjusted in response to the change in the eyeball / pupil position of the subject.

[0117] The above descriptions are only some embodiments of the present invention, and do not limit the present invention in any form. The various features / elements / components in the embodiments of the present invention can be implemented in any combination without conflict.

[0118] Although the present invention has been disclosed as above in terms of preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the present invention can use the above-mentioned technical contents to make some changes or modifications to equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. An auxiliary kit for a portable eye tracker, comprising: A head support device (1), a portable eye tracker support (2) and a control system, wherein the portable eye tracker support (2) is used to support the eye tracker in front of a test subject, and is characterized in that the head support device (1) comprises: A base (12) is detachably mounted on the experimental table; A head support assembly (11), the head support assembly (11) being located on the base (12), the head support assembly (11) comprising a chin support (111) adapted to the shape of the chin and a sliding column (113) connected to the chin support (111); A lifting control assembly (13), the lifting control assembly (13) comprising a sliding column lifting motor (131) located in the base (12) and used for driving the sliding column (113) of the head support assembly (11) to lift and lower; and A desktop locking assembly (14), the desktop locking assembly (14) comprising a locking claw guide rail (144) extending from the bottom of the base (12) and a locking claw (145) located on the locking claw guide rail (144), the locking claw (145) moving on the locking claw guide rail (144) to achieve locking / relaxation of the head support device (1) and the experimental desktop; The portable eye tracker stand (2) comprises a stand base assembly (21) and a three-joint mechanical arm consisting of a large arm assembly (22), a small arm assembly (23) and a wrist assembly (24); the stand base assembly (21), the large arm assembly (22), the small arm assembly (23) and the wrist assembly (24) are hinged in sequence; the rotation axes of the large arm assembly (22), the small arm assembly (23) and the wrist assembly (24) are parallel to each other and perpendicular to a vertical plane; the large arm assembly (22), the small arm assembly (23) and the wrist assembly (24) have only a degree of freedom of rotation about their respective rotation axes and are provided with a driving device; The support base assembly (21) comprises a drive device installation part (2102), a support foot (2112) symmetrically arranged along a vertical plane, and a right movable support foot (2104) and a left movable support foot (2106) that can be freely extended and retracted along the width direction of the test machine to adapt to the size of the test machine. When one or both of the left movable support foot (2106) and the right movable support foot (2104) are moved, the two move synchronously and move the same distance. The drive device installation part (2102) is U-shaped, and its two vertical side walls are symmetrically provided with a large arm support bearing (2201). The large arm assembly (22) comprises a large arm drive device (2140) and a large arm left rod (2202), a large arm right rod (2213) and a large arm shaping member that are separately arranged. The upper arm left rod (2202), the upper arm right rod (2213) and the upper arm shaping member (2210) are connected to form an H-shaped structure; the upper arm left flange (2203) is mounted on the upper arm left rod (2202), and the upper arm right flange (2212) is mounted on the upper arm right rod (2213); the upper arm left flange (2203) and the upper arm right flange (2212) are respectively matched with the inner rings of the upper arm support bearings (2201) mounted on the two vertical side walls of the drive device mounting part (2102), so as to support the H-shaped structure to rotate around the bracket base assembly (21); the upper arm drive device (2140) is fixed on one of the vertical side walls of the drive device mounting part (2102), so as to drive the H-shaped structure to rotate; The control system is configured to calculate a target height of the chin rest (111) and target angles of the upper arm assembly (22), the lower arm assembly (23) and the wrist assembly (24), and to adjust the chin rest (111) to the target height and the upper arm assembly (22), the lower arm assembly (23) and the wrist assembly (24) to the target angles.

2. The auxiliary kit according to claim 1, characterized in that: The locking claw (145) is driven to move on the locking claw guide rail (144) by a locking claw lifting motor (141) arranged in the base (12); the two locking claw guide rails (144) are symmetrically arranged about the central symmetry plane of the head support device (1); a nut seat mounting hole (146) and two guide through holes (147) slidably matched with the locking claw guide rails (144) are arranged on the locking claw (145); a nut seat connected to the locking claw lifting motor (141) is installed in the nut seat mounting hole (146); and the control system controls the locking claw lifting motor (141) to achieve locking / relaxation of the locking claw (145) and the experimental tabletop.

3. The auxiliary kit according to claim 1, characterized in that: The base (12) comprises a hollow tube body (121), the hollow tube body (121) being capable of accommodating a sliding cylinder (113) connected to the lower side of the chin support (111), the outer circumferential surface of the sliding cylinder (113) being provided with a guide groove (114) along the axial direction, the hollow tube body (121) being provided with a guide locking threaded hole (123) radially on the upper part of the cylindrical surface close to the subject, the guide locking member (124) being threadedly connected to the guide locking threaded hole (123), and the guide locking member (124) being screwed into the guide locking threaded hole (123) and then having its rear end inserted into the guide groove (114) of the sliding cylinder (113).

4. The auxiliary kit according to claim 3, characterized in that: An image recognition device (125) is provided on the outer circumferential surface of the side of the hollow tube (121) close to the tested machine, and the control system calculates a combination of one or more of the following information based on the image collected by the image recognition device (125): the distance in the front-to-back direction between the head support device (1) and the portable eye tracker bracket (2), the distance in the front-to-back direction between the head support device (1) and the screen of the tested machine, the height of the screen, and the height of the bottom edge of the lower side of the screen from the desktop.

5. The auxiliary kit according to claim 1, characterized in that: The right movable support foot (2104) is provided with a right support foot rack (2128), the left movable support foot (2106) is provided with a left support foot rack (2129), and a synchronous gear (2105) meshing with the right support foot rack (2128) and the left support foot rack (2129) is provided between the right support foot rack (2128) and the left support foot rack (2129).

6. The auxiliary kit according to claim 1, characterized in that: Both the right movable support foot (2104) and the left movable support foot (2106) are provided with positioning protrusions (2125) for clamping the edge of the laptop computer when the laptop computer is used as a tested machine, and for entering a storage state when the laptop computer is not used as a tested machine.

7. The auxiliary kit according to claim 1, characterized in that: The right support foot horizontal section (2124) of the right movable support foot (2104) and the left support foot horizontal section (2132) of the left movable support foot (2106) respectively have a claw extending towards the back of the screen of the tested machine.

8. The auxiliary kit according to claim 1, characterized in that: The forearm assembly (23) is driven by the forearm driving device (2139) to rotate around the hinge axis, and the wrist assembly (24) is driven by the wrist driving motor (2302) arranged on the forearm assembly (23) through a transmission chain to perform pitching motion.

9. A portable eye tracker, characterized in that: The invention comprises an eye tracker and an auxiliary kit as described in any one of claims 1 to 8.

Images