An autism eye movement trajectory recognizer

Abstract

The application relates to the technical field of eye movement instruments, and discloses an autism eye movement track recognition instrument, which comprises an instrument base plate, a playing device is fixedly installed at one end of the instrument base plate, a head limiting mechanism is rotationally assembled at the other end of the instrument base plate, the playing device is used for playing materials, and an eye movement tracking camera for collecting the eye picture of a patient when the patient watches the materials is hiddenly installed on the playing device. The autism eye movement track recognition instrument limits the head position of the patient through the swingable head limiting mechanism, the swing of the head of the patient can reduce the uncomfortable feeling, the eye movement tracking camera is driven to move synchronously through a power transmission assembly, the eyes of the patient can be kept facing the camera during the test process, the eyes of the patient are prevented from deviating from the shooting range of the camera, and the eye movement tracking camera is prevented from moving and lagging behind when the head of the patient swings, so that the shooting of the eyes is not delayed, and the accuracy of collecting the eye movement track of the patient is ensured.

Description

Technical Field

[0001] This invention relates to the field of eye tracker technology, specifically to an eye movement trajectory recognition device for autism. Background Technology

[0002] Many human behaviors require visual information to be successfully completed. In order to obtain visual information, the human eye will align the fovea of ​​the eye with the location where the information is needed, and will move three times per second. Therefore, eye movements provide important clues for understanding human behavior for two main reasons: First, the change in the position of eye fixation over time reflects the change in human information needs; second, although the eyes move three to four times per second, humans are mostly unaware of this and are not aware of where the eyes are pointing.

[0003] Therefore, eye tracking provides an ideal and powerful objective indicator in the human process of exploring information needs and cognitive processing, and is widely used in the research and development of visualization systems, as well as in fields such as medicine, psychology, linguistics, and the military. Based on the fact that all the characteristics of autism are ultimately summarized into four subtypes—sensory impairment, social language impairment, social behavioral impairment, and restricted interests—eye trackers can be used to extract the real-time eye movement trajectories of autistic patients. By using meaningful video footage in conjunction with eye trackers, patients can be further subdivided based on their eye movement patterns.

[0004] Currently available desktop eye trackers offer higher accuracy, and the camera's proximity to the patient's eyes prevents distraction during autism diagnosis, making them suitable for autism classification testing. However, these eye trackers typically require a stationary placement in front of a desktop display, limiting the camera's position and thus the shooting range. When analyzing eye movements in autistic patients, they need to sit in front of the display to keep their head within the camera's field of view. However, during testing, head movements due to autism or personal habits can cause relative displacement between the patient's eyes and the camera, sometimes even causing the eyes to move out of the camera's field of view. This necessitates constant camera tracking, leading to incomplete eye movement data acquisition and ultimately affecting test accuracy. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an eye movement trajectory recognition device for autism, which has the advantages of allowing the patient's eyes to remain facing the camera and the patient's head to move freely. This solves the problems of existing technologies where the patient's eyes easily move out of the camera's field of view and the patient easily feels uncomfortable due to prolonged head fixation.

[0007] (II) Technical Solution

[0008] To address the technical problems of existing technologies, such as patients' eyes easily drifting out of the camera's field of view and patients experiencing discomfort due to prolonged head fixation, this invention provides the following technical solution:

[0009] An eye-tracking recognition device for autism includes an instrument chassis, a playback device fixedly mounted at one end of the instrument chassis, and a head-limiting mechanism rotatably mounted at the other end of the instrument chassis.

[0010] The playback device is used to play materials. An eye-tracking camera is hidden on the playback device to capture the patient's eye movements when watching the materials. The eye-tracking camera transmits the collected information to the eye tracker sensor. The eye tracker sensor obtains the patient's eye movement trajectory by combining the video played by the playback device.

[0011] The head limiting mechanism is used to limit the position of the patient's head so that the patient's head and the eye-tracking camera remain relatively stationary. When the patient's head swings, the patient's head drives the head limiting mechanism to move synchronously with it so that the head limiting mechanism and the patient's head remain relatively stationary. At the same time, the head limiting mechanism drives the eye-tracking camera to move synchronously through the power transmission component to keep the patient's head and the eye-tracking camera relatively stationary.

[0012] Preferably, the playback device includes a display screen and a device housing disposed outside the display screen. The upper part of the device housing has a receiving cavity, the eye-tracking camera is disposed inside the receiving cavity, and a detachable cover is provided on the side of the receiving cavity near the head limiting mechanism. A one-way mirror is provided on the detachable cover.

[0013] The instrument chassis includes a base and a wall panel fixedly installed at one end of the base. The support legs at the bottom of the device housing are disposed on the upper surface of the base, and the back side of the device housing is fixedly assembled on the wall panel.

[0014] Preferably, the head limiting mechanism includes a mandibular support plate, a forehead limiting plate, a connecting rod, and a support column. The mandibular support plate has a mandibular limiting groove. The mandibular support plate and the forehead limiting plate are connected at both ends by the connecting rod. The mandibular support plate supports the patient's mandibular jaw, and the forehead limiting plate limits the patient's forehead, so that the patient's eyes are perpendicular to the surface of the display screen. The support column is fixedly connected to the lower surface of the mandibular support plate, and the support column is rotatably mounted on the base.

[0015] Preferably, the power transmission assembly includes a sleeve, a connecting arm, and a slider. Flanges are provided at both ends of the sleeve. The flanges at both ends of the sleeve are fixedly assembled to the connecting arm and the lower end of the support column by screws. The slider is fixedly connected to the upper end of the connecting arm, and the eye-tracking camera is fixedly mounted on the slider.

[0016] Preferably, the upper surface of the base has a mounting groove in the middle, and the two ends of the mounting groove have a first receiving groove and a second receiving groove respectively. The lower ends of the connecting arm and the support column are rotatably assembled inside the first receiving groove and the second receiving groove respectively. A fixed shaft is fixedly installed between the first receiving groove and the second receiving groove. The lower ends of the connecting arm, the lower ends of the support column and the sleeve are all rotatably assembled on the fixed shaft.

[0017] Preferably, an arc-shaped guide groove is provided on the side of the receiving cavity away from the head limiting mechanism, the slider is slidably assembled in the arc-shaped guide groove, and a limiting cavity is provided on the surface of the wall panel to accommodate the connecting arm. The shapes of the arc-shaped guide groove and the limiting cavity correspond to the movement trajectories of the slider and the connecting arm, respectively.

[0018] Preferably, the inner walls on both sides of the upper opening of the first and second receiving grooves are both set in an outwardly flared inclined shape to limit the rotation range of the connecting arm and the support column, and torsion springs are respectively provided between the inner wall of the first receiving groove and the two sides of the connecting arm, and between the inner wall of the second receiving groove and the two sides of the support column.

[0019] Preferably, the device housing has a cable port for connecting a mouse and keyboard, and a pull-out box is provided on one side of the base for storing the mouse and keyboard.

[0020] Preferably, a method of using an eye movement tracking device for autism includes the following steps:

[0021] S1: Video footage is played on the display screen, and the patient's head is limited by the head restraint mechanism;

[0022] S2: An eye-tracking camera captures images of the patient's eyes as they watch the footage, and the patient's eye movement trajectory is analyzed by combining the images from the playback footage with the eye-tracking sensor.

[0023] S3: Compare the patient's eye movement trajectory with that of a normal child to identify the patient's area of ​​interest and determine the type of autism.

[0024] S4: Develop an rTMS treatment plan based on the patient's autism type, and use an autism eye-tracking recognition device during treatment to record and analyze the specific visual manifestations of the improvement in social visual impairment in autism patients.

[0025] (III) Beneficial Effects

[0026] Compared with the prior art, the present invention provides an eye movement trajectory recognition device for autism, which has the following beneficial effects:

[0027] 1. This autism eye-tracking trajectory recognition device uses a head-limiting mechanism to drive the eye-tracking camera to move synchronously through a power transmission component, keeping the patient's head relatively stationary with respect to the eye-tracking camera. This avoids changes in displacement or angle between the eye-tracking camera and the patient's eyes, effectively preventing the eye-tracking camera from needing to re-lock and recognize the patient's eyes after changes in displacement or angle between the patient's eyes and the eye-tracking camera, which would result in incomplete eye-tracking trajectory recognition and affect the judgment of the patient's disease type.

[0028] 2. In this autism eye-tracking trajectory recognition device, the head limiting mechanism drives the eye-tracking camera to move synchronously through the power transmission component to keep the patient's head relatively still with respect to the eye-tracking camera. This allows the eye-tracking camera to move in real time with the patient's head position, ensuring that the patient's eyes remain relatively still with respect to the eye-tracking camera during the test. This prevents the eye-tracking camera from lagging behind when the patient's head moves, which would lead to untimely eye-tracking and recognition and affect the accuracy of collecting the patient's eye-tracking trajectory.

[0029] 3. This autism eye-tracking recognition device limits the patient's head position by setting a swingable head limiting mechanism, so that the patient can keep the distance between the eyes and the display screen in a moderate manner during the test. The patient can also swing his head, which effectively prevents the patient from feeling uncomfortable due to the head being fixed for a long time and avoids the patient from having negative emotions and not cooperating with the test.

[0030] 4. This autism eye-tracking recognition device uses an eye-tracking camera hidden inside the device housing to capture images of the patient's eyes while watching materials. The eye-tracking camera can capture images of the patient's eyes in real time through a one-way mirror, without the patient seeing the camera. This avoids the patient's attention being drawn to the eye-tracking camera during material playback, thus improving the objectivity of the test results.

[0031] 5. This autism eye-tracking recognition device uses a head-limiting mechanism to restrict the patient's head position, keeping the patient's head relatively still with the eye-tracking camera. This ensures that the patient's eyes remain facing the camera during the test, allowing the camera to capture the patient's eye movement trajectory throughout the test. When the patient's head moves, the head-limiting mechanism moves synchronously with it, maintaining a relatively still position. This synchronous movement of the head-limiting mechanism driven by the patient's head prevents negative emotions caused by prolonged head fixation. During the movement, the patient's head will not leave the limit of the head-limiting mechanism, thus improving the patient's comfort during the test and preventing the patient's head from leaving the eye-tracking camera's capture and recognition range. Attached Figure Description

[0032] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0033] Figure 2 This is a schematic diagram of the head restraint mechanism, eye-tracking camera, and power transmission component of the present invention.

[0034] Figure 3 This is a schematic diagram of the instrument chassis structure of the present invention;

[0035] Figure 4 This is one of the partial cross-sectional structural schematic diagrams of the present invention;

[0036] Figure 5 This is a second partial cross-sectional structural schematic diagram of the present invention;

[0037] Figure 6 This is a schematic diagram of the head limiting mechanism of the present invention;

[0038] Figure 7 This is an exploded view of the power transmission component of the present invention;

[0039] Figure 8 This is a schematic diagram of the playback device structure of the present invention.

[0040] In the diagram: 1. Instrument chassis; 11. Base; 111. Mounting slot; 112. First receiving slot; 113. Second receiving slot; 114. Pull-out box; 12. Wall panel; 121. Limiting cavity; 13. Fixed shaft; 2. Playback device; 21. Display screen; 22. Device housing; 221. Receiving cavity; 222. One-way mirror; 223. Arc-shaped guide groove; 224. Cable insertion port; 3. Head limiting mechanism; 31. Jaw support plate; 32. Forehead limiting plate; 33. Connecting rod; 34. Support column; 4. Eye-tracking camera; 5. Power transmission assembly; 51. Sleeve; 52. Connecting arm; 53. Slider; 6. Torsion spring. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] Please see Figure 1 , Figure 2 An autism eye movement trajectory recognition device includes an instrument chassis 1, a playback device 2 fixedly installed at one end of the instrument chassis 1, and a head limiting mechanism 3 rotatably mounted at the other end of the instrument chassis 1.

[0043] Playback device 2 is used to play materials. An eye-tracking camera 4 is hidden on playback device 2 to capture the patient's eye movements when watching the materials. The eye-tracking camera 4 transmits the collected information to the eye tracker sensor. The eye tracker sensor is electrically connected to the controller of playback device 2 so that the eye tracker sensor can obtain data information from the playback device. Thus, the eye tracker sensor can obtain the patient's eye movement trajectory by combining the video played by playback device 2. Therefore, the eye-tracking camera 4 can capture the patient's eye movement trajectory in real time without interfering with the patient's attention, thereby improving the accuracy of the test of the patient's eye movement trajectory.

[0044] The head limiting mechanism 3 is used to limit the position of the patient's head so that the patient's head and the eye-tracking camera 4 remain relatively still. This ensures that the patient's eyes are facing the camera during the test, and that the camera can capture the patient's eye movement trajectory throughout the test. When the patient's head swings, the patient's head drives the head limiting mechanism 3 to move synchronously with it, so that the head limiting mechanism 3 and the patient's head remain relatively still. This synchronous swinging of the head limiting mechanism 3 driven by the patient's head prevents the patient from developing negative emotions due to prolonged head fixation. During the swinging process, the patient's head will not leave the limit of the head limiting mechanism 3, thereby improving the patient's comfort during the test and preventing the patient's head from leaving the shooting and recognition range of the eye-tracking camera.

[0045] When a traditional eye-tracking camera 4 moves to follow the movement of the eyes, the eye-tracking camera 4 needs to analyze the movement trend of the eyes using a recognition and analysis system before it can follow the movement. This method requires a certain amount of time to analyze the movement trend of the eyes, which causes the eye-tracking camera 4 to move slowly and thus not capture or recognize the eyes in a timely manner, affecting the accuracy of collecting the patient's eye movement trajectory.

[0046] The head limiting mechanism 3 of the present invention drives the eye-tracking camera 4 to move synchronously through the power transmission component 5 to keep the patient's head and the eye-tracking camera 4 relatively stationary. This allows the eye-tracking camera 4 to move in real time with the position of the patient's head, ensuring that the patient's eyes remain relatively stationary with the eye-tracking camera 4 during the test. This prevents the eye-tracking camera 4 from moving too slowly when the patient's head moves, which would result in untimely eye capture and recognition and affect the accuracy of collecting the patient's eye movement trajectory.

[0047] At the same time, the head limiting mechanism 3 drives the eye-tracking camera 4 to move synchronously through the power transmission component 5 to keep the patient's head and the eye-tracking camera 4 relatively still. This avoids changes in displacement or angle between the eye-tracking camera 4 and the patient's eyes, effectively preventing the eye-tracking camera 4 from needing to re-lock and recognize the patient's eyes after changes in displacement or angle between the patient's eyes and the eye-tracking camera 4, which would result in incomplete eye movement trajectory recognition and affect the judgment of the patient's disease type.

[0048] In use, the instrument base 1 is placed on a table, and the patient sits in front of the table. The head is restricted by the head limiting mechanism 3. Material is played on the playback device 2, and the patient's eyes are captured by a hidden eye-tracking camera 4 while watching the material. During the viewing process, the patient's head can move, and the head limiting mechanism 3 moves synchronously with it. The head limiting mechanism 3 drives the eye-tracking camera 4 to move synchronously through the power transmission component 5, so that the patient's eyes can remain facing the camera during the test. After the material is viewed, the eye-tracking camera 4 transmits the collected information to the eye tracker sensor. The eye tracker sensor, combined with the video played by the playback device 2, can calculate the patient's eye movement trajectory during the viewing of the material.

[0049] Please see Figure 3-5 Furthermore, the playback device 2 includes a display screen 21 and a device housing 22 disposed outside the display screen 21. The upper part of the device housing 22 has a receiving cavity 221. The eye-tracking camera 4 is disposed inside the receiving cavity 221. A detachable cover is provided on the side of the receiving cavity 221 near the head limiting mechanism 3. A one-way mirror 222 is provided on the detachable cover. Thus, the eye-tracking camera 4 can take real-time pictures of the patient's eyes outside through the one-way mirror 222, while the patient will not see the eye-tracking camera 4. This avoids the patient's attention being attracted by the eye-tracking camera 4 during the playback of the material, thereby improving the objectivity of the test results.

[0050] The instrument chassis 1 includes a base 11 and a wall panel 12 fixedly installed at one end of the base 11. The support feet at the bottom of the equipment housing 22 are set on the upper surface of the base 11 and the back side of the equipment housing 22 is fixedly assembled on the wall panel 12.

[0051] Please see Figure 4-6 Furthermore, the head limiting mechanism 3 includes a mandibular support plate 31, a forehead limiting plate 32, a connecting rod 33, and a support column 34. The mandibular support plate 31 has a mandibular limiting groove. The mandibular support plate 31 and the forehead limiting plate 32 are connected by the connecting rod 33. The mandibular support plate 31 supports the patient's mandibular jaw and the forehead limiting plate 32 limits the patient's forehead, so that the patient's eyes are perpendicular to the surface of the display screen 21. The support column 34 is fixedly connected to the lower surface of the mandibular support plate 31 and is rotatably mounted on the base 11.

[0052] This design effectively limits the patient's head position, ensuring a proper distance between the patient's eyes and the display screen 21 during the test. The patient's head can drive the entire head-limiting mechanism 3 to swing synchronously during the test, preventing negative emotions and non-cooperation from caused by prolonged head immobilization, thus ensuring the test is completed successfully. Specifically, the mandibular support plate 31 and the forehead limiting plate 32 are padded on one side of the patient's head.

[0053] Please see Figure 6 , Figure 7 Furthermore, the power transmission assembly 5 includes a sleeve 51, a connecting arm 52, and a slider 53. Both ends of the sleeve 51 are provided with flanges. The flanges at both ends of the sleeve 51 are respectively fixedly assembled with the connecting arm 52 and the lower end of the support column 34 by screws. The upper end of the connecting arm 52 is fixedly connected to the slider 53, and the eye-tracking camera 4 is fixedly installed on the slider 53.

[0054] When the patient's head swings, the head limiting mechanism 3 swings synchronously, the support column 34 can drive the sleeve 51 to rotate. The sleeve 51 drives the eye-tracking camera 4 to rotate synchronously through the connecting arm 52 and the slider 53, thereby ensuring that the patient's eyes can remain facing the eye-tracking camera 4 during the test, and the connecting arm 52, sleeve 51 and support column 34 are easy to disassemble and install.

[0055] Please see Figure 3-5 Furthermore, a mounting groove 111 is provided in the middle of the upper surface of the base 11, and a first receiving groove 112 and a second receiving groove 113 are provided at both ends of the mounting groove 111. The lower ends of the connecting arm 52 and the support column 34 are rotatably assembled inside the first receiving groove 112 and the second receiving groove 113, respectively. A fixed shaft 13 is fixedly installed between the first receiving groove 112 and the second receiving groove 113. The lower ends of the connecting arm 52, the lower ends of the support column 34, and the sleeve 51 are all rotatably assembled on the fixed shaft 13. The fixed shaft 13 serves as the central axis for the rotation of the connecting arm 52, the support column 34, and the sleeve 51.

[0056] Please see Figure 3-5Furthermore, an arc-shaped guide groove 223 is provided on the side of the receiving cavity 221 away from the head limiting mechanism 3. The slider 53 is slidably assembled in the arc-shaped guide groove 223. A limiting cavity 121 is provided on the surface of the wall panel 12. The limiting cavity 121 is used to accommodate the connecting arm 52. The shapes of the arc-shaped guide groove 223 and the limiting cavity 121 correspond to the movement trajectories of the slider 53 and the connecting arm 52, respectively. Thus, when the head limiting mechanism 3 drives the eye-tracking camera 4 to move synchronously through the power transmission component 5, the slider 53 slides along the arc-shaped guide groove 223 and the connecting arm 52 slides in the limiting cavity 121, thereby limiting the swing amplitude of the eye-tracking camera 4.

[0057] Please see Figure 4 , Figure 5 Furthermore, the inner walls on both sides of the upper opening of the first receiving groove 112 and the second receiving groove 113 are both set to be outwardly sloping to limit the rotation range of the connecting arm 52 and the support column 34. Torsion springs 6 are respectively provided between the inner wall of the first receiving groove 112 and the two sides of the connecting arm 52, and between the inner wall of the second receiving groove 113 and the two sides of the support column 34. Thus, the torsion springs 6 can buffer the swing speed of the support column 34 when the patient's head drives the head limiting mechanism 3 to swing synchronously, so as to avoid the patient's head swinging sharply and prevent the patient from being injured.

[0058] Please see Figure 8 Furthermore, the device housing 22 is provided with a cable port 224, through which a mouse and keyboard are connected. A pull-out box 114 is provided on one side of the base 11, which is used to place the mouse and keyboard, so that the display screen 21 can be operated by the mouse and keyboard, and the mouse and keyboard are easy to store.

[0059] In use, the instrument base 1 is placed on a table, and the patient sits in front of the table with their chin resting on the mandibular support plate 31. Simultaneously, the patient's forehead rests on the forehead limiting plate 32, thus limiting the patient's head position. The required test materials are played on the display screen 21 by operating the mouse and keyboard. An eye-tracking camera 4, installed inside the receiving cavity 221, captures real-time images of the patient's eyes through a one-way mirror 222. The patient can move their head while viewing the materials, and this head movement drives the head limiting mechanism 3 to move synchronously. This mechanism is located between the inner wall of the first receiving groove 112 and both sides of the connecting arm 52, and the second... The torsion springs 6 between the inner wall of the receiving groove 113 and both sides of the support column 34 can buffer the swing speed of the support column 34 to prevent injury to the patient. When the head limiting mechanism 3 swings, the support column 34 rotates around the fixed axis 13 and drives the eye-tracking camera 4 to rotate synchronously around the fixed axis 13 through the sleeve 51, connecting arm 52, and slider 53 in sequence, so that the patient's eyes are facing the eye-tracking camera 4. After the material is viewed, the eye-tracking camera 4 transmits the collected information to the eye tracker sensor. The eye tracker sensor, combined with the video played on the display screen 21, can calculate the patient's eye movement trajectory during the viewing of the material.

[0060] Furthermore, a method for using an eye-tracking recognition device for autism includes the following steps:

[0061] S1: Video footage is played on the display screen, and the patient's head is limited by the head restraint mechanism;

[0062] S2: An eye-tracking camera captures images of the patient's eyes as they watch the footage, and the patient's eye movement trajectory is analyzed by combining the images from the playback footage with the eye-tracking sensor.

[0063] S3: Compare the patient's eye movement trajectory with that of a normal child to identify the patient's area of ​​interest and determine the type of autism.

[0064] S4: Develop an rTMS treatment plan based on the patient's autism type, and use an autism eye-tracking recognition device during treatment to record and analyze the specific visual manifestations of the improvement in social visual impairment in autism patients.

[0065] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An eye-tracking recognition device for autism, comprising an instrument chassis (1), wherein a playback device (2) is fixedly mounted at one end of the instrument chassis (1), and a head limiting mechanism (3) is rotatably mounted at the other end of the instrument chassis (1), characterized in that: The playback device (2) is used to play materials. An eye-tracking camera (4) is hidden on the playback device (2) to capture the patient's eye movements when watching the materials. The eye-tracking camera (4) transmits the collected information to the eye tracker sensor. The eye tracker sensor obtains the patient's eye movement trajectory by combining the video played by the playback device (2). The head limiting mechanism (3) is used to limit the position of the patient's head so that the patient's head and the eye-tracking camera (4) remain relatively stationary. When the patient's head swings, the patient's head drives the head limiting mechanism (3) to move synchronously with it so that the head limiting mechanism (3) and the patient's head remain relatively stationary. At the same time, the head limiting mechanism (3) drives the eye-tracking camera (4) to move synchronously through the power transmission component (5) so as to keep the patient's head and the eye-tracking camera (4) relatively stationary. The playback device (2) includes a display screen (21) and a device housing (22) disposed outside the display screen (21). The upper part of the device housing (22) is provided with a receiving cavity (221). The eye-tracking camera (4) is disposed inside the receiving cavity (221). A detachable cover is provided on the side of the receiving cavity (221) near the head limiting mechanism (3). A one-way mirror (222) is provided on the detachable cover. The instrument chassis (1) includes a base (11) and a wall panel (12) fixedly installed at one end of the base (11). The support feet at the bottom of the equipment housing (22) are provided on the upper surface of the base (11) and the back side of the equipment housing (22) is fixedly mounted on the wall panel (12). The head limiting mechanism (3) includes a support column (34); The power transmission assembly (5) includes a sleeve (51), a connecting arm (52), and a slider (53). Both ends of the sleeve (51) are provided with flanges. The flanges at both ends of the sleeve (51) are fixedly assembled with the connecting arm (52) and the lower end of the support column (34) by screws. The upper end of the connecting arm (52) is fixedly connected to the slider (53). The eye-tracking camera (4) is fixedly installed on the slider (53). The base (11) has an installation groove (111) in the middle of its upper surface. The installation groove (111) has a first receiving groove (112) and a second receiving groove (113) at both ends. The lower ends of the connecting arm (52) and the support column (34) are rotatably assembled inside the first receiving groove (112) and the second receiving groove (113), respectively. A fixed shaft (13) is fixedly installed between the first receiving groove (112) and the second receiving groove (113). The lower ends of the connecting arm (52), the lower ends of the support column (34), and the sleeve (51) are all rotatably assembled on the fixed shaft (13). The inner walls on both sides of the upper opening of the first receiving groove (112) and the second receiving groove (113) are both set to be inclined outward to limit the rotation range of the connecting arm (52) and the support (34). Torsion springs (6) are respectively provided between the inner wall of the first receiving groove (112) and the two sides of the connecting arm (52), and between the inner wall of the second receiving groove (113) and the two sides of the support (34).

2. The autism eye movement trajectory recognition device according to claim 1, characterized in that: The head limiting mechanism (3) also includes a mandibular support plate (31), a forehead limiting plate (32), and a connecting rod (33). The mandibular support plate (31) has a mandibular limiting groove. The mandibular support plate (31) and the forehead limiting plate (32) are connected at both ends by the connecting rod (33). The mandibular support plate (31) supports the patient's mandibular jaw and the forehead limiting plate (32) limits the patient's forehead, so that the patient's eyes are perpendicular to the surface of the display screen (21). The lower surface of the mandibular support plate (31) is fixedly connected to the support column (34), and the support column (34) is rotatably mounted on the base (11).

3. The autism eye movement trajectory recognition device according to claim 1, characterized in that: An arc-shaped guide groove (223) is provided on the side of the receiving cavity (221) away from the head limiting mechanism (3). The slider (53) is slidably assembled in the arc-shaped guide groove (223). A limiting cavity (121) is provided on the surface of the wall panel (12). The limiting cavity (121) is used to accommodate the connecting arm (52). The shapes of the arc-shaped guide groove (223) and the limiting cavity (121) correspond to the movement trajectories of the slider (53) and the connecting arm (52), respectively.

4. The autism eye movement trajectory recognition device according to claim 1, characterized in that: The device housing (22) has a cable port (224) for connecting the mouse and keyboard. A pull-out box (114) is provided on one side of the base (11) for placing the mouse and keyboard.

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