A head-mounted equipment field of view measurement system

Abstract

The present invention discloses a head-mounted equipment field of view measurement system, comprising: a control panel for sending, receiving, analyzing and calculating information; a spherical dome, the interior of which is provided with a space for a subject to wear a head-mounted equipment for field of view measurement, and a plurality of light-emitting elements for providing light points required for field of view measurement installed at the intersection of longitude and latitude lines of the inner sphere; the plurality of light-emitting elements are electrically connected to the control panel via cables and are lit or extinguished under the control of the control panel; a feedback transponder, electrically connected to the control panel via wires, is used to feedback the subject's response to the light points on the spherical dome. The light points required for field of view measurement are set on the inner sphere of the spherical dome. Due to the large spherical diameter of the spherical dome, a large number of light points can be arranged on the inner sphere of the spherical dome, and the distribution range of the light points on the inner sphere of the spherical dome is wide, which can expand the field of view measurement range of the head-mounted equipment, improve the stability of the field of view measurement results, and evaluate the field of view design of various types of head-mounted equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of head-mounted equipment detection, and in particular to a head-mounted equipment field of view measurement system. Background Art

[0002] Pilot headgear includes helmets, goggles (glare protection goggles, wind shields), night vision goggles, oxygen masks, gas (biochemical) masks, and other head protection or visual equipment. The field of view of these devices and their combination directly affects the spatial range of the pilot's observation, which in turn affects flight operations.

[0003] Currently, there is no field of view measurement system specifically designed for pilot headgear, nor is there a design evaluation system for pilot headgear. The closest product is a medical perimeter, which operates as follows: ① Adjust a fixed background brightness in the test device; ② Cover one eye of the patient and test the uncovered eye; ③ Fix the subject's head; ④ Have the subject actively gaze at a fixed point; ⑤ The test procedure begins, at which point stimuli of varying brightness appear within the set test range; ⑥ The subject perceives the stimulus and actively responds to it via an indicator; ⑦ After the monocular test is completed, cover the tested eye and begin testing the contralateral eye using the same method; ⑧ Finally, a binocular visual field test report is generated based on the responses from both eyes.

[0004] However, the medical perimeter has a small aperture (a sphere with a diameter of about 0.5m), few light points (about 200 light points), and a small measurement range (less than 90°, i.e. less than half a sphere). It can only be used for naked eye visual field examination and serves the diagnosis of ophthalmic diseases. It cannot be used for visual field (field of view) measurement of head-mounted equipment. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a measurement system that has a large measurement range, multiple light points, and good measurement result stability, which can be applied to the field of view measurement of head-mounted equipment and used to evaluate the field of view design of various types of head-mounted equipment.

[0006] In order to solve the above technical problems, the technical solutions of the present invention are as follows:

[0007] A head-mounted equipment field of view measurement system, comprising:

[0008] Control panel, used for sending, receiving, analyzing and calculating information;

[0009] A spherical dome, wherein a space is provided inside for a subject to wear a head-mounted device for field of view measurement. A plurality of light-emitting elements for providing light points required for field of view measurement are installed at the intersection of longitude and latitude lines of the inner sphere; the plurality of light-emitting elements are electrically connected to the control board via cables and are lit or extinguished under the control of the control board;

[0010] The feedback transponder is electrically connected to the control board through a wire and is used to feed back the response result of the test subject to the light spot on the spherical dome.

[0011] Furthermore, the intervals between the meridians on the spherical dome are 5° to 15°, and the intervals between the latitudes are 2° to 10°.

[0012] Furthermore, the light-emitting component includes a light-emitting diode, a lamp holder embedded in the spherical shell of the spherical dome and used to mount the light-emitting diode, a light driving board fixed on the outer surface of the spherical shell of the spherical dome and electrically connected to the lamp holder, and the light driving board is electrically connected to the control board via a cable.

[0013] Furthermore, the spherical dome is in the shape of a shell of three-quarter sphere, and is formed by splicing six one-eighth spherical shells; the two one-eighth spherical shells missing from the complete spherical shell of the spherical dome are located in the lower half of the complete spherical shell and are connected at different positions.

[0014] Furthermore, the lower end of the spherical dome is provided with multiple columns for supporting the spherical dome and a connecting ring connected to and arranged around the multiple columns; the lower end of each column is provided with a height adjustment mechanism for adjusting the height of the column.

[0015] Furthermore, the plurality of columns are connected to connecting rings arranged around the plurality of columns, and the connecting rings are connected to at least two universal wheels.

[0016] Furthermore, light guide plates for adjusting the brightness inside the spherical dome are installed on the two pillars located on the left and right sides of the subject.

[0017] Furthermore, the spherical dome is also equipped with a laser electrically connected to the control board for determining the position of the subject's eyeballs. The laser includes a straight-line laser located in front of the subject and a cross-shaped laser located above the subject's head.

[0018] Furthermore, the spherical dome is also equipped with a camera electrically connected to the control panel for monitoring the head posture of the subject, the camera including a first camera located on the spherical dome directly in front of the subject and a second camera located on the left or right side of the subject.

[0019] Furthermore, a mandibular support bracket for fixing the posture of the subject is provided in the spherical dome.

[0020] Furthermore, the mandibular support bracket includes a base, a support rod fixed at one end to the base, a screw rod vertically mounted on the support rod through an adjustment ring, a lower jaw support arranged on the top of the screw rod, and a limit screw mounted on the support rod to prevent the screw rod from loosening.

[0021] Furthermore, the control board is also electrically connected to a display, and the display is used to display the coordinates of the light spots on the spherical dome and the response results of the subjects to the various light spots on the spherical dome.

[0022] Furthermore, the control board is electrically connected to a host computer, and the host computer includes:

[0023] An information display module, configured to display the identity information of the subject and information about the headgear worn by the subject on the display;

[0024] A serial port control module, used for controlling the lighting and extinguishing of the light-emitting elements on the spherical dome through the control panel;

[0025] a response feedback module, configured to receive, through the control board, the response result of the subject to the light spot on the spherical dome fed back by the feedback transponder;

[0026] a response rate calculation module, configured to calculate the response rate based on the response result provided by the response feedback module;

[0027] The data management module is used to store the identity information of the subject, the head-mounted equipment information worn by the subject, and the calculated response rate obtained by the subject's field of view measurement.

[0028] The technical solution of the present invention has the following advantages:

[0029] 1. The field of view measurement system for head-mounted equipment provided by the present invention employs multiple light-emitting elements, each providing the light points required for field of view measurement, positioned at the intersection of longitude and latitude lines on the inner surface of a spherical dome. After a subject wears the head-mounted equipment, field of view measurements are performed within the spherical dome. The subject's responses to the light points on the spherical dome are then fed back to a control panel via a feedback transponder, thereby completing the field of view measurement of the head-mounted equipment. Due to the large diameter of the spherical dome, a large number of light points can be arranged on the inner surface of the spherical dome, and the light points are distributed over a wide range on the inner surface of the spherical dome. This expands the field of view measurement range of the head-mounted equipment and improves the stability of the field of view measurement results, making it suitable for evaluating the field of view design of various types of head-mounted equipment.

[0030] 2. The field of view measurement system for head-mounted equipment provided by the present invention has a spherical dome in the shape of a shell of three-quarter spheres and is spliced ​​together from six one-eighth spherical shells. The interval between the longitude lines on the spherical dome is 5° to 15°, and the interval between the latitude lines is 2° to 10°. A sufficient number of light spots can be arranged at the intersection of the longitude and latitude lines of the three-quarter sphere of the spherical dome, thereby improving the reliability of the field of view measurement results of the head-mounted equipment.

[0031] 3. The head-mounted equipment field of view measurement system provided by the present invention has multiple columns at the lower end of the spherical dome and the height adjustment mechanism on the columns. The height of the spherical dome can be adjusted according to the different sitting heights and eye heights of the subjects, ensuring the reliability of the measurement results obtained by the head-mounted equipment field of view measurement system.

[0032] 4. The head-mounted equipment field of view measurement system provided by the present invention has universal wheels set on the connecting ring between the columns to facilitate the adjustment of the position of the spherical dome, which improves the comfort of the subjects during the test.

[0033] 5. The head-mounted equipment field of view measurement system provided by the present invention has light guide plates located on the pillars on opposite sides of the subject, which can adjust the brightness inside the spherical dome, reduce visual errors, and improve the stability of visual field measurement results.

[0034] 6. The head-mounted equipment field of view measurement system provided by the present invention includes a straight-line laser located directly in front of the subject and a cross-shaped laser located above the subject's head. These can be used to determine the subject's eye position before field of view measurement to ensure that the subject's eye position is in the center of the spherical dome, thereby improving the stability of the visual field measurement results.

[0035] 7. The head-mounted equipment field of view measurement system provided by the present invention has cameras installed in front and on the left side of the spherical dome, which can monitor the head posture of the subject and send a control signal to the control panel to stop measurement when the subject's head posture deviates from the posture during the test, thereby ensuring the stability of the field of view measurement results.

[0036] 8. The head-mounted equipment field of view measurement system provided by the present invention has a mandibular support bracket set in the spherical dome, which can support the subject's mandible, ensure the subject's head posture is stable during the test, and improve the stability of the measurement results and the subject's comfort during the test.

[0037] 9. The head-mounted equipment field of view measurement system provided by the present invention has an adjustable vertical height of the chin support bracket, which can adapt to the different eye height adjustment requirements of different subjects.

[0038] 10. The head-mounted equipment field of view measurement system provided by the present invention displays the coordinates of the light points on the spherical dome and the response results of the subject to each light point on the spherical dome on the display, which can more intuitively display the field of view measurement results of the head-mounted equipment.

[0039] 11. The head-mounted equipment field of view measurement system provided by the present invention has a control board that receives instructions from the host computer, accurately controls the light-emitting sequence, duration, time interval, light intensity, and feedback response signal of the light-emitting diodes, and controls the light driver board to implement the above-mentioned instruction information. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 Schematic diagram of the structure of a spherical dome in a head-mounted device field of view measurement system according to an embodiment of the present invention;

[0042] Figure 2 Schematic diagram of the structure of the mandibular support bracket in an embodiment of the present invention;

[0043] Figure 3 This is a control block diagram of a head-mounted device field of view measurement system according to an embodiment of the present invention;

[0044] Figure 4 This is a software system block diagram of the field of view measurement system for head-mounted equipment according to an embodiment of the present invention;

[0045] Figure 5 This is a field of view coordinate diagram of the front hemisphere and a test schematic diagram of the first zone of the head-mounted equipment field of view measurement system in an embodiment of the present invention;

[0046] Figure 6 This is a field of view coordinate diagram of the rear hemisphere of the head-mounted equipment field of view measurement system in an embodiment of the present invention.

[0047] Explanation of Reference Numerals: 1. spherical dome; 2. mandibular support bracket; 21. base; 22. support rod; 23. screw; 24. mandibular support; 25. adjustment ring; 26. limit screw; 3. column; 4. connecting ring; 5. height adjustment mechanism; 6. universal wheel; 7. light guide plate;

[0048] 10. Host computer; 20. Main control board; 30. Control board; 40. Camera; 50. Feedback transponder; 60. Light emitting diode; 70. Light driver board;

[0049] 100, information display module; 200, serial port control module; 300, response feedback module; 400, response rate calculation module; 500, data management module. DETAILED DESCRIPTION

[0050] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0053] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] like Figure 1 A head-mounted equipment field of view measurement system shown in FIG6 includes a mechanical structure system, a measurement control system and a software processing system.

[0055] In this embodiment, the mechanical structure system is used to provide a field of view test environment for the subject wearing the head-mounted equipment, including a spherical dome 1, a mandibular support bracket 2, a light-emitting diode 60 (light spot), a laser, a camera 40, etc.

[0056] like Figure 1As shown, the spherical dome 1 is in the shape of a shell of three-quarter sphere, and is composed of six one-eighth spherical shells; the two one-eighth spherical shells that are missing from the complete spherical shell of the spherical dome 1 are located in the lower half of the complete spherical shell and are connected. The interior of the spherical dome 1 is provided with a space for the subject to wear a head-mounted device to perform field of view measurement. The subject can enter the spherical dome 1 through the missing part of the lower half of the spherical dome 1. The lower end of the spherical dome 1 is provided with four columns 3 for supporting the spherical dome 1. The four columns 3 are placed vertically and are evenly arranged around the outer circumference of the spherical dome 1. A connecting ring 4 with a diameter of 2m is connected to the bottom of the four columns 3. The connecting ring 4 is a special metal ring connector used to connect the four columns 3 together to improve the stability of the overall structure. A height adjustment mechanism 5 is installed at the bottom of each column 3 to adjust the height of the column 3. This mechanism adjusts the height of the spherical dome 1 according to the subject's varying sitting and eye heights, ensuring the reliability of the measurement results obtained by the head-mounted device's field of view measurement system. Three universal wheels 6 are mounted on the connecting ring 4. When moving, the height adjustment mechanisms 5 on the four columns 3 are retracted, allowing the universal wheels 6 to touch the ground. The universal wheels 6 facilitate adjustment of the position of the spherical dome 1, ensuring greater comfort for the subject during the test.

[0057] In this embodiment, the inner surface of the spherical dome 1 is divided into longitude and latitude lines, with longitude lines spaced at 15° intervals and latitude lines spaced at 10° (first zone, third zone) and 5° (second zone). There are 505 intersections of these lines. These intersections are used to mount light-emitting components that provide the light points required for field of view measurement. The light-emitting components are electrically connected to the control board 30 via cables and are turned on or off by the control board 30. Specifically, the light-emitting components include a light-emitting diode 60, a lamp holder embedded in the spherical shell of the spherical dome 1 and used to mount the light-emitting diode 60, and a light driving board 70 fixed to the outer surface of the spherical shell of the spherical dome 1 and electrically connected to the lamp holder. The light driving board 70 is electrically connected to the control board 30 via cables, and the control board 30 is further electrically connected to the main control board 20 of the host computer 10. The light-emitting diode 60 can be a 3mm red and blue light-emitting diode 60.

[0058] This head-mounted equipment field of view measurement system has a spherical dome 1 in the shape of a three-quarter spherical shell and is composed of six one-eighth spherical shells. The spherical dome 1 has a large spherical diameter, and a large number of light spots can be arranged on the inner spherical surface of the spherical dome 1. The light spots are distributed over a wide range on the inner spherical surface of the spherical dome 1. This can expand the measurement range of the subject's field of view wearing a head-mounted equipment within the spherical dome 1, improve the stability of the field of view measurement results, and can be used to evaluate the field of view design of various types of head-mounted equipment.

[0059] In this embodiment, the spherical dome is also equipped with lasers electrically connected to the main control board 20 for determining the subject's eye position. These lasers include a straight-line laser positioned directly in front of the subject and a cross-shaped laser positioned above the subject's head. The straight-line and cross-shaped lasers coordinately determine the subject's eye position before field of view measurement, ensuring that the subject's eye is centered within the spherical dome 1, thereby improving the stability of visual field measurement results.

[0060] In this embodiment, the spherical dome is also equipped with cameras 40, electrically connected to the main control board 20, for monitoring the subject's head posture. The cameras 40 include a first camera 40 located on the spherical dome directly in front of the subject and a second camera 40 located on the spherical dome to the left or right of the subject. The cameras 40, mounted in front of, on the left or right side of the spherical dome, monitor the subject's head posture and, if the subject's head posture deviates from the posture used during the test, send a control signal to the measurement control system to stop measurement, thereby ensuring the stability of the visual field measurement results.

[0061] In this embodiment, light guide plates 7 are provided on the pillars 3 located on the left and right sides of the subject, and the light guide plates 7 can adjust the internal brightness of the spherical dome.

[0062] In this embodiment, a mandibular support bracket 2 for fixing the posture of the subject is provided in the spherical dome 1. Specifically, the mandibular support bracket 2 includes a base 21, a support rod 22 with one end fixed to the base 21 and adjustable in height, and a mandibular support 24 connected to the end of the support rod 22 opposite to the base 21; the support rod 22 includes at least two hollow support rods that are sequentially sleeved and a locking member for locking two adjacent hollow support rods. Specifically, the locking member is a locking screw. The provision of the mandibular support bracket 2 in the spherical dome 1 can support the mandible of the subject, ensure the stability of the subject's head posture during the test, improve the stability of the measurement results and the subject's comfort during the test. The vertical height of the mandibular support bracket 2 is adjustable, which can adapt to the adjustment requirements of different eye heights of different subjects.

[0063] The measurement and control system includes a lighting randomization control module and a signal feedback response module. The lighting randomization control module is mounted on a control board 30, and the signal feedback response module is mounted on a main control board 20. The control board 30 is connected to the main control board 20 via wires, which are in turn electrically connected to a feedback transponder 50 via wires. The feedback transponder 50 is used to transmit the subject's response to the light-emitting diodes 60 (light spots) on the spherical dome to the main control board 20. The main control board 20 sends instructions to the control board 30, which responds by controlling the light-emitting sequence, duration, time interval, and intensity of the light-emitting diodes 60 (light spots) on the spherical dome 1. Specifically, the control board 30 also serves as a power supply, providing power to the laser, camera 40, and light guide plate 7.

[0064] The software processing system is installed on a PC platform, which provides a human-computer interface. The software processing system includes an information display module 100, a serial port control module, a response feedback module 300, a response rate calculation module 400, and a data management module 500. The head-mounted equipment field of view measurement system sets the measurement time and location, participant information, subject information, and head-mounted equipment information. These are entered and stored in the information query and storage module and can be displayed on the human-computer interface. The serial port control module controls the light spot on the spherical dome through the main control board 20 and the control board 30. The response feedback module 300 is used to display the response results and calculate the response boundary value on the human-computer interface. The response rate calculation module 400 is used to calculate the response rate of different subjects to the head-mounted equipment. The data management module 500 is used to store various information in a database and can call, view, and modify the data in the database according to instructions.

[0065] In the field of view measurement system of this head-mounted equipment, during the measurement process, the subject enters the spherical dome, sits on a chair in the spherical dome, and supports the mandibular support 24 on the mandibular support 24 bracket. The height of the mandibular support 24 bracket is adjusted to make the subject's head posture in a relatively comfortable position. Then, the brightness inside the spherical dome is adjusted by the light guide plate 7, and the height of the subject's eye position is determined by a pair of lasers. Then, the height adjustment mechanism 5 on the column 3 is adjusted to adjust the height of the spherical dome so that the subject's eye position is located in the center of the spherical dome. Then, the random light control module controls the light spots on the spherical dome to light up randomly through the control panel 30. After seeing the light spots light up, the subject presses the button of the feedback transponder 50 to make a mark on the light spot coordinate diagram, such as Figure 5As shown. Before it lights up, it's marked as a "black circle." If it lights up and a response is made, the "black circle" changes to a "hollow circle with a + sign inside." If it lights up but no response is made, the "black circle" changes to a "hollow circle." Each time the light comes on, it responds only once (including the sound emitted when pressing or releasing the transponder); multiple presses are ineffective. If the light isn't on and you press it, there's no response. If you don't respond when the light is on (you don't see the timeout for not pressing the key), it's marked as a "hollow circle" until the next light comes on.

[0066] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A head-mounted equipment field of view measurement system, characterized in that: include: Control panel (30), used for sending, receiving, analyzing and calculating information; A spherical dome (1) is provided with a space inside for a subject to wear a head-mounted device for visual field measurement, and a plurality of light-emitting elements for providing light points required for visual field measurement are installed at the intersection of longitude and latitude lines of the inner sphere; the plurality of light-emitting elements are electrically connected to the control board (30) via cables and are lit or extinguished under the control of the control board (30); the interval between the longitude lines on the spherical dome (1) is 5° to 15°, and the interval between the latitude lines is 2° to 10°; A feedback transponder (50) is electrically connected to the control board (30) via a wire and is used to feed back the subject's response result to the light spot on the spherical dome; the feedback transponder (50) includes a key, and the response result includes a visible response result of the light spot when the subject presses the key after the light spot is lit, and an invisible response result of the light spot when the subject does not press the key after the light spot is lit.

2. The head-mounted equipment field of view measurement system according to claim 1, characterized in that: The light-emitting element comprises a light-emitting diode (60), a lamp holder embedded in the spherical shell of the spherical dome (1) and used to mount the light-emitting diode (60), and a light driving board (70) fixed on the outer surface of the spherical shell of the spherical dome (1) and electrically connected to the lamp holder, wherein the light driving board (70) is electrically connected to the control board (30) via a cable.

3. The head-mounted equipment field of view measurement system according to claim 1, characterized in that: The spherical dome (1) is in the shape of a shell of three-quarter sphere and is formed by splicing together six one-eighth spherical shells; the two one-eighth spherical shells missing from the complete spherical shell of the spherical dome (1) are located in the lower half of the complete spherical shell and are connected at the same position.

4. The head-mounted equipment field of view measurement system according to claim 1, characterized in that: The lower end of the spherical dome (1) is provided with a plurality of columns (3) for supporting the spherical dome (1) and a connecting ring (4) connected to the plurality of columns (3) and arranged around the plurality of columns (3); the lower end of each column (3) is provided with a height adjustment mechanism (5) for adjusting the height of the column (3).

5. The head-mounted equipment field of view measurement system according to claim 4, characterized in that: The plurality of upright posts (3) are connected to a connecting ring (4) arranged around the plurality of upright posts (3), and the connecting ring (4) is connected to at least two universal wheels (6).

6. The head-mounted equipment field of view measurement system according to claim 4, characterized in that: Light guide plates (7) for adjusting the brightness inside the spherical dome are installed on the two upright posts (3) located on the left and right sides of the test object.

7. The head-mounted equipment field of view measurement system according to any one of claims 1 to 5, characterized in that: The spherical dome is also equipped with a laser electrically connected to the control board (30) for determining the eyeball position of the subject. The laser includes a straight-line laser located in front of the subject and a cross-shaped laser located on the top of the subject's head.

8. The head-mounted equipment field of view measurement system according to any one of claims 1 to 5, characterized in that: The spherical dome is also equipped with a camera (40) electrically connected to the control panel (30) for monitoring the head posture of the subject. The camera (40) includes a first camera (40) located on the spherical dome in the front direction of the subject and a second camera (40) located on the spherical dome on the left or right side of the subject.

9. The head-mounted equipment field of view measurement system according to any one of claims 1 to 5, characterized in that: A mandibular support bracket (2) for fixing the posture of the subject is provided in the spherical dome (1).

10. The head-mounted equipment field of view measurement system according to claim 9, characterized in that: The mandibular support bracket (2) comprises a base (21), a support rod (22) with one end fixed to the base (21), a screw rod (23) vertically movably mounted on the support rod (22) via an adjustment ring (25), a lower jaw support (24) arranged on the top of the screw rod (23), and a limit screw (26) mounted on the support rod (22) for preventing the screw rod (23) from loosening.

11. The head-mounted equipment field of view measurement system according to any one of claims 1 to 5, characterized in that: The control panel (30) is also electrically connected to a display, and the display is used to display the coordinates of the light spots on the spherical dome and the response results of the subjects to the various light spots on the spherical dome.

12. The head-mounted equipment field of view measurement system according to claim 11, characterized in that: The control board (30) is electrically connected to a host computer (10), and the host computer (10) includes: An information display module (100) is used to display the identity information of the subject and the head-mounted equipment information worn by the subject on the display; A serial port control module (200) is used to control the lighting and extinguishing of the light-emitting element on the spherical dome through the control panel (30); a response feedback module (300) for receiving, via the control panel (30), the response result of the test subject to the light spot on the spherical dome fed back by the feedback transponder (50); A response rate calculation module (400), configured to calculate the response rate based on the response result provided by the response feedback module (300); The data management module (500) is used to store the identity information of the subject, the head-mounted equipment information worn by the subject, and the calculated response rate obtained by the subject's field of view measurement.

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