Field of view measurement device and method

Abstract

This invention relates to the field of testing technology for operational machinery, and provides a field of view measurement device and method. The field of view measurement device includes: a bottom support device, configured with adjustable height; a rotating base, rotatably connected to the bottom support device, the rotation axis of the rotating base being perpendicular to the height direction of the bottom support device; a pair of laser emitting devices, each rotatably connected to the rotating base, the rotation axis of the laser emitting devices being perpendicular to the rotation axis of the rotating base; and a distance measuring device disposed on the rotating base, used to detect the distance from the emission point of the laser emitting device to an obstruction. Thus, the field of view measurement device of this invention can measure the field of view based on the laser emitting device, thereby reducing the influence of external light on the field of view measurement device, and making the laser emitting device more convenient to use, not limited to nighttime or dark rooms.

Description

Technical Field

[0001] This invention relates to the field of testing technology for operational machinery, and in particular to a field of view measurement device and method. Background Technology

[0002] For operational machinery, cab visibility is a crucial indicator of vehicle safety. Current technology typically uses a light bulb as the light source, measuring visibility by observing the shadows cast by obstructions in the field of vision. This method requires measurement at night or in a dark room, making it highly inconvenient. Summary of the Invention

[0003] This invention provides a field of view measurement device and method to solve the shortcomings of existing field of view measurement devices that require measurement at night or in a dark room, thereby reducing the influence of external light on the field of view measurement device.

[0004] This invention provides a field of view measurement device, comprising:

[0005] The bottom support device is height-adjustable.

[0006] A rotating base is rotatably connected to the bottom support device, and the rotation axis of the rotating base is perpendicular to the height direction of the bottom support device;

[0007] A pair of laser emitting devices are provided, each of which is rotatably connected to the rotating base, and the rotation axis of the laser emitting device is perpendicular to the rotation axis of the rotating base.

[0008] A ranging device is disposed on the rotating base, and the ranging device is used to detect the distance from the emission point of the laser emitting device to the obstruction.

[0009] According to a field of view measuring device provided by the present invention, the bottom support device includes a base, a support seat, and a telescopic component that can extend and retract.

[0010] The two ends of the telescopic component are respectively connected to the base and the support.

[0011] The rotating seat is rotatably connected to the supporting seat.

[0012] According to a field of view measuring device provided by the present invention, the telescopic component is rotatably connected to the base, and the rotation axis of the telescopic component extends along the height direction of the bottom support device.

[0013] According to the field of view measuring device provided by the present invention, a rotation damping structure is further included, wherein the rotation damping structure is disposed between the telescopic component and the base, and is used to provide damping for the relative rotation of the telescopic component and the base.

[0014] According to the present invention, a field of view measuring device further includes a first sliding seat and a turntable, wherein the first sliding seat corresponds one-to-one with the turntable and the turntable corresponds one-to-one with the laser emitting device;

[0015] The first sliding seat is slidably connected to the rotating seat, and the displacement direction of the first sliding seat is perpendicular to the height direction of the bottom support device;

[0016] The turntable is rotatably connected to the first sliding seat, and the laser emitting device is connected to the turntable.

[0017] According to the present invention, a field of view measuring device further includes a first scale corresponding to the first sliding seat, the first scale being disposed on the first sliding seat and coaxially disposed with the turntable.

[0018] According to the present invention, a field of view measuring device further includes a second sliding seat, which is slidably connected to the rotating seat, and the displacement direction of the second sliding seat is perpendicular to the height direction of the bottom support device, and the ranging device is disposed on the second sliding seat.

[0019] According to the present invention, a field of view measuring device further includes a support rod, which is connected to the bottom support device, and the rotating seat is rotatably fitted onto the support rod.

[0020] A field-of-view measuring device according to the present invention further includes a second scale.

[0021] The bottom support device and / or the rotating seat are provided with a second scale, and the second scale is coaxial with the rotation axis of the rotating seat.

[0022] The present invention also provides a method for measuring field of view, implemented based on the aforementioned field of view measuring device, comprising:

[0023] The height of the bottom support device is adjusted based on the SIP point, and the illumination pitch angle of the laser emitting device is adjusted by rotating the rotating seat.

[0024] The distance between the launch point and the obstruction is detected using a ranging device;

[0025] Rotate the two laser emitting devices so that the light emitted by the two laser emitting devices coincides with the boundary of the corresponding side of the obstruction;

[0026] The distance between the two sides of the obstruction is calculated based on the distance between the emission point and the obstruction, the distance between the two laser emission devices, and the rotation angle of the two laser emission devices respectively.

[0027] The blind spot width is calculated based on the distance between the emission point and the obstruction, the distance between the two laser emission devices, and the distance between the two sides of the obstruction.

[0028] The field-of-view measurement device provided by this invention, through a height-adjustable bottom support device, allows adjustment of the height of the laser emitting device based on the SIP point of the vehicle under test. A rotating base allows simultaneous adjustment of the illumination pitch angle of both laser emitting devices, thereby simulating the actual pitch angle of a driver's head rotation. A ranging device detects the distance from the emission point to an obstruction. By rotating the two laser emitting devices respectively, aligning the emitted light rays with the corresponding boundaries of the obstruction, the blind spot range can be determined. Finally, using the distance between the two laser emitting devices, the distance between the emission point and the obstruction, and the rotation angles of the two laser emitting devices, the blind spot width can be calculated, thus completing the field-of-view measurement process.

[0029] With this configuration, the field of view measurement device provided by the present invention can measure the field of view based on the laser emitting device, thereby reducing the influence of external light on the field of view measurement device, and thus making the laser emitting device not limited to use at night or in dark rooms, making it more convenient to use.

[0030] Simultaneously rotating the two laser emitters from the rotating base simulates the actual pitch angle of a driver's line of sight, resulting in measurements closer to reality. By rotating each laser emitter separately, aligning their emitted beams with the corresponding boundary of the obstruction, the driver's field of vision can be simulated, thus determining the blind spot. A ranging device can then detect the distance from the emission point to the obstruction.

[0031] Furthermore, the field of view measurement method provided by the present invention is implemented based on the field of view measurement device provided by the present invention, and thus includes all the advantages of the field of view measurement device mentioned above. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0033] Figure 1This is a schematic diagram of the field of view measurement device in the embodiments provided by the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of the rotating seat and the bottom support device in the embodiment provided by the present invention;

[0035] Figure 3 yes Figure 2 Exploded view of the view shown;

[0036] Figure 4 This is a schematic diagram of the rotating seat in an embodiment provided by the present invention;

[0037] Figure 5 This is a schematic diagram of the test state of the field of view measurement device in the embodiments provided by the present invention;

[0038] Figure 6 This invention provides an embodiment of a field of view measurement method, which is a schematic diagram of the detection principle.

[0039] Figure label:

[0040] 1. Rotating seat; 2. Laser emitting device; 3. Range measuring device; 4. Support seat; 5. Telescopic assembly; 6. First sliding seat; 7. Turntable; 8. First dial; 9. Second sliding seat; 10. Support rod; 11. Second dial; 12. Tripod; 13. Bracket; 14. Guide groove; 15. Weight reduction hole; 16. Obstruction. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0042] The following is combined Figures 1 to 6 Describe the field of view measurement device provided in the embodiments of the present invention.

[0043] Specifically, the field of view measuring device includes a bottom support device, a rotating base 1, a laser emitting device 2, and a ranging device 3.

[0044] The bottom support device is height-adjustable. The height of the bottom support device refers to the direction of the field of view measurement device, such as... Figure 1 When placed in the posture shown, Figure 1 The vertical direction in the middle.

[0045] The rotating base 1 is rotatably connected to the bottom support device, and the rotation axis of the rotating base 1 is perpendicular to the height direction of the bottom support device.

[0046] The number of laser emitting devices 2 is set to a pair. Each pair of laser emitting devices 2 is rotatably connected to the rotating base 1, and the rotation axis of the laser emitting device 2 is perpendicular to the rotation axis of the rotating base 1. Optionally, the emission direction of the laser emitting device 2 is perpendicular to its rotation axis. Optionally, the laser emitting device 2 can be configured as a laser emitter.

[0047] A ranging device 3 is mounted on the rotating base 1. The ranging device 3 is used to detect the distance from the emission point of the laser emitting device 2 to the obstruction 16. The ranging device 3 can be configured as a laser rangefinder. Further, the laser rangefinder is positioned at the midpoint between the two laser emitters. Thus, when the laser rangefinder is aligned with the center of the obstruction 16 in the width direction, the two laser emitters are located on opposite sides of the obstruction 16, resulting in more accurate laser emitter positioning and consequently more accurate measurement results. Further, the laser rangefinder is flush with the laser emitters.

[0048] The field-of-view measurement device provided in this embodiment of the invention, through a height-adjustable bottom support device, can adjust the height of the laser emitting device 2 based on the SIP point (seat index point) of the vehicle under test. The rotating base 1 allows simultaneous adjustment of the illumination pitch angle of both laser emitting devices 2, thereby simulating the actual pitch angle of the driver's head rotation. The ranging device 3 can detect the distance from the emission point of the laser emitting device to the obstruction 16. By rotating the two laser emitting devices 2 respectively, so that the light emitted by the two laser emitting devices 2 coincides with the boundary of the corresponding side of the obstruction 16, the blind spot range can be determined. Finally, using the distance between the two laser emitting devices 2, the distance between the emission point and the obstruction 16, and the rotation angle of each laser emitting device 2, the width of the blind spot can be calculated, thus completing the field-of-view measurement process.

[0049] With this configuration, the field of view measurement device provided by the present invention can measure the field of view based on the laser emitting device 2, thereby reducing the influence of external light on the field of view measurement device, and thus making the laser emitting device 2 not limited to use at night or in a dark room, making it more convenient to use.

[0050] Simultaneously, rotating the two laser emitters 2 by rotating the base 1 simulates the actual pitch angle of a driver's line of sight, resulting in more accurate measurements. By rotating the two laser emitters 2 separately, aligning the light emitted by each emitter with the corresponding boundary of the obstruction 16, the driver's field of vision can be simulated, thus determining the blind spot range. The distance from the emission point to the obstruction 16 can be detected by the ranging device 3.

[0051] In some embodiments provided by the present invention, the bottom support device includes a base, a support seat 4, and a telescopic component 5 that can extend and retract.

[0052] The two ends of the telescopic component 5 are connected to the base and the support 4, respectively.

[0053] Rotary seat 1 is rotatably connected to support seat 4.

[0054] This design simplifies the structure of the bottom support device.

[0055] Optionally, the telescopic assembly 5 may include an outer rod and an inner rod. For example, the inner rod may slidably extend into the outer rod, and the two may be interference-fitted to ensure relative fixation when no external force is applied, preventing free sliding. Alternatively, the outer rod and inner rod may be threaded together, allowing relative axial displacement by rotating them relative to each other.

[0056] Optionally, the base includes a tripod 12 and a support 13. The two ends of the support 13 are connected to the tripod 12 and the telescopic assembly, respectively. The tripod is designed to be foldable, and the support 13 is detachably connected to the tripod 12 via threaded fasteners. The tripod 12 provides stable support, and after measurement, the tripod 12 and support 13 can be disassembled for easy storage and space saving.

[0057] In some embodiments provided by the present invention, the telescopic component 5 is rotatably connected to the base, and the rotation axis of the telescopic component 5 extends along the height direction of the bottom support device.

[0058] With this setup, during the measurement process, by rotating the telescopic component 5, the distance measuring device 3 can be aligned with the center of the obstruction 16 in the width direction, making it more convenient and faster to use.

[0059] In some embodiments provided by the present invention, the field of view measuring device further includes a rotation damping structure, which is disposed between the telescopic component 5 and the base to provide damping for the relative rotation of the telescopic component 5 and the base.

[0060] This configuration prevents the telescopic component 5 from rotating relative to the base, causing the distance measuring device 3 to deviate from the obstruction 16, once the center of the distance measuring device 3 is aligned with the center of the obstruction 16 in the width direction.

[0061] Optionally, the base is provided with a pivot, and the telescopic assembly 5 is provided with a connecting hole for the pivot to extend into. Furthermore, the outer circumferential surface of the pivot is provided with a groove, and the rotation damping structure may include a rubber block or spring plate disposed within the groove. By abutting against the wall of the connecting hole, friction is increased, thereby hindering the relative rotation of the telescopic assembly 5 and the base. This configuration results in a simple rotation damping structure.

[0062] refer to Figure 2 , Figure 3 As shown, in some embodiments provided by the present invention, the field of view measuring device further includes a first sliding seat 6 and a turntable 7, wherein the first sliding seat 6 and the turntable 7 correspond one-to-one, and the turntable 7 corresponds one-to-one with the laser emitting device 2.

[0063] The first sliding seat 6 is slidably connected to the rotating seat 1, and the displacement direction of the first sliding seat 6 is perpendicular to the height direction of the bottom support device.

[0064] The turntable 7 is rotatably connected to the first sliding seat 6, and the rotation axis of the turntable 7 is perpendicular to the rotation axis of the turntable 1. The laser emitting device 2 is connected to the turntable 7, and the emission direction of the laser emitting device 2 is perpendicular to the rotation axis of the turntable 7.

[0065] This configuration allows for stepless adjustment of the distance between the two laser emitting devices 2 by sliding the first sliding seat 6 along the rotating seat 1, thereby enabling the simulation of various eye distances, making it more convenient to use, and broadening the applicability of the field of view measurement device.

[0066] Furthermore, graduation lines are distributed on the rotating base 1 along the displacement path of the first sliding base 6. In this way, the distance between the two laser emitting devices 2 can be easily and quickly determined when the first sliding base 6 is moved.

[0067] refer to Figure 2 , Figure 3 As shown, in some embodiments provided by the present invention, the field of view measuring device further includes a first scale 8 corresponding to the first sliding seat 6. The first scale 8 is disposed on the first sliding seat 6 and is coaxially disposed with the turntable 7.

[0068] With this configuration, the rotation angle of the laser emitting device 2 can be read directly from the first dial 8 when the laser emitting device 2 is rotated, thus enabling convenient and quick reading of the rotation angle of the laser emitting device 2.

[0069] In some embodiments provided by the present invention, the field of view measuring device further includes a second sliding seat 9, which is slidably connected to the rotating seat 1, and the displacement direction of the second sliding seat 9 is perpendicular to the height direction of the bottom support device. The ranging device 3 is disposed on the second sliding seat 9.

[0070] refer to Figure 3 , Figure 4As shown, optionally, the rotating seat 1 is provided with a guide groove 14, and the first sliding seat 6 and the second sliding seat 9 are both disposed in the guide groove 14, with the two first sliding seats 6 respectively disposed on both sides of the second sliding seat 9. Furthermore, in order to prevent the second sliding seat 9 from sliding freely and causing positional movement, the second sliding seat 9 can be interference-fitted with the guide groove 14.

[0071] Furthermore, the rotating seat 1 is provided with a weight-reducing hole 15 whose extension direction is parallel to the extension direction of the guide groove 14.

[0072] Furthermore, the cross-section of the rotating base 1 perpendicular to the length direction is set as a fan-shaped structure, thereby reducing the weight of the rotating base and achieving the effect of making the field of view measurement device lightweight.

[0073] refer to Figure 3 As shown, in some embodiments of the present invention, the field of view measuring device further includes a support rod 10, which is connected to a bottom support device, and a rotating seat 1 is rotatably fitted onto the support rod 10. For example, both ends of the support rod 10 are threaded, both ends of the support rod 10 are rotatably connected to the support seat 4, and both ends of the support rod 10 are fitted with nuts.

[0074] This design simplifies the connection between the rotating base 1 and the support base 4, making disassembly and assembly easier, and thus facilitating the disassembly and storage of the field of view measuring device. When it is necessary to adjust the angle of the rotating base 1, the nut on the support rod 10 can be loosened first, and after adjustment, the nut on the support rod 10 can be tightened to prevent the rotating base 1 from rotating.

[0075] refer to Figure 2 , Figure 3 As shown, in some embodiments provided by the present invention, the field of view measuring device further includes a second dial 11.

[0076] The bottom support device and / or rotating base 1 is provided with a second scale 11, which is coaxial with the rotation axis of the rotating base 1. With this configuration, when the rotating base 1 is driven to rotate, the rotation angle of the rotating base 1 can be conveniently and quickly read through the second scale 11.

[0077] In some embodiments of the present invention, the field of view measuring device further includes a level disposed on the bottom support device. For example, the level can be disposed on the support base 4. By setting the level, the two laser emitting devices 2 can be placed on the same horizontal plane, thereby meeting the measurement requirements.

[0078] This invention also provides a method for measuring field of view.

[0079] Specifically, the field of view measurement method is implemented based on the field of view measurement device, and the method includes: steps 100 to 500.

[0080] Step 100: Adjust the height of the bottom support device based on the SIP point, and adjust the irradiation pitch angle of the laser emitting device 2 by rotating the rotating seat 1.

[0081] refer to Figure 5 As shown, specifically, since each type of cab has its own corresponding SIP point, once the cab is determined, the SIP point is also determined accordingly, and the distance H1 from the SIP point to the cab floor can also be determined. Adjust the length of the telescopic component 5 so that the distance between the laser emitting device 2 and the cab floor is H1+c, for example, c can be set to 680mm.

[0082] Furthermore, the distance H2 from the cab floor to the reference horizontal plane can be obtained through measurement. The reference horizontal plane refers to the ground supporting the cab. Meanwhile, the radius r of the visibility test circle is usually a known quantity set manually. For example, r can be set to 12000 mm. Based on the formula A1 = arctan{r / (H1+H2+c)}, the required illumination pitch angle of the laser emitting device 2 can be calculated to ensure that the light emitted by the laser emitting device 2 falls on the visibility test circle. Finally, the angle of the rotating seat 1 can be adjusted according to A1. This setting allows for accurate calculation of the emission pitch angle of the laser emitting device 2 based on the cab type, resulting in more accurate measurement results.

[0083] Step 200: Use the ranging device 3 to detect the distance between the launch point and the obstruction 16.

[0084] Specifically, the telescopic component 5 can be rotated to align the ranging device 3 with the center of the obstruction 16 in the width direction, and the ranging device 3 can be used to measure the distance value a between the launching point and the obstruction 16.

[0085] Step 300: Rotate the two laser emitting devices 2 and make the light emitted by the two laser emitting devices 2 coincide with the boundary of the corresponding side of the obstruction 16.

[0086] Specifically, refer to Figure 6 As shown, the laser emitting device 2 on the left coincides with the left boundary of the obstruction 16, and the laser emitting device 2 on the right coincides with the right boundary of the obstruction 16. The distance between the illumination points of the two laser emitting devices 2 falling on the visibility test circle is defined as the blind zone width x.

[0087] Step 400: Calculate the distance between the two sides of the obstruction 16 based on the distance between the emission point and the obstruction 16, the distance between the two laser emission devices 2, and the rotation angle of the two laser emission devices 2 respectively.

[0088] Specifically, refer to Figure 6As shown, the distance between the emission point and the obstruction 16 is value a. The distance between the two laser emitting devices 2 is value s, which is essentially the eye distance and can be set according to the experimental requirements. The rotation angles of the two laser emitting devices 2 are A2 and A3, respectively. The distance value b between the two sides of the obstruction 16 can be calculated based on the formula b = a(tanA2 + tanA3) + s.

[0089] Step 500: Calculate the blind spot width based on the distance between the emission point and the obstruction 16, the distance between the two laser emission devices 2, and the distance between the two sides of the obstruction 16.

[0090] Specifically, refer to Figure 6 As shown, the distance between the emission point and the obstruction 16 is 'a'. The distance between the two laser emission devices 2 is 's'. The distance between the two sides of the obstruction 16 is 'b'. The blind zone width 'x' can be calculated based on the formula x = {(bs) / a}r + s.

[0091] The field-of-view measurement method provided in this embodiment of the invention allows for adjustment of the height of the laser emitting device 2 based on the SIP point of the vehicle under test via a height-adjustable bottom support device. The tilt angle of the two laser emitting devices 2 can be adjusted simultaneously via the rotating base 1, thereby simulating the tilt angle of the driver's gaze when their head rotates. The distance from the emission point to the obstruction 16 can be detected via the ranging device 3. By rotating the two laser emitting devices 2 respectively, so that the light emitted by the two laser emitting devices 2 coincides with the boundary of the corresponding side of the obstruction 16, the blind spot range can be determined. Finally, the blind spot width can be calculated using the distance between the two laser emitting devices 2, the distance between the emission point and the obstruction 16, and the rotation angle of the two laser emitting devices 2, thus completing the field-of-view measurement process.

[0092] With this configuration, the field of view measurement method provided by the present invention can measure the field of view based on the laser emitting device 2, thereby reducing the influence of external light on the field of view measurement device, and thus making the laser emitting device 2 not limited to use at night or in a dark room, making it more convenient to use.

[0093] Simultaneously, rotating the two laser emitters 2 by rotating the base 1 simulates the actual pitch angle of a driver's line of sight, resulting in more accurate measurements. By rotating the two laser emitters 2 separately, aligning the light emitted by each emitter with the corresponding boundary of the obstruction 16, the driver's field of vision can be simulated for both sides, thus determining the blind spot range. The distance from the emission point to the obstruction 16 can be detected using the ranging device 3.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A visual field measuring device, characterized in that, The utility model relates to a kind of laser visibility test device, including: Bottom support device, set as height adjustable; Rotary seat, rotatably connected with the bottom support device, the rotary axis of the rotary seat is perpendicular to the height direction of the bottom support device, the rotary seat is provided with guide slot; Laser emission device, set as a pair, a pair of laser emission device is rotatably connected with the rotary seat, the rotary axis of the laser emission device is perpendicular to the rotary axis of the rotary seat; Distance measuring device, set in the rotary seat, the distance measuring device is used to detect the distance from the emission point of the laser emission device to the shelter; First sliding seat and rotary table, the first sliding seat is corresponding with the rotary table, the rotary table is corresponding with the laser emission device, the first sliding seat is set in the guide slot, the first sliding seat is slidably connected with the rotary seat, and the displacement direction of the first sliding seat is perpendicular to the height direction of the bottom support device, the rotary table is rotatably connected with the first sliding seat, the rotary axis of the rotary table is perpendicular to the rotary axis of the rotary seat, the laser emission device is connected with the rotary table, and the emission direction of the laser emission device is perpendicular to the direction of the rotary axis of the rotary table, scale line is distributed on the rotary seat along the displacement path of the first sliding seat to determine the interval of two laser emission devices; Wherein, based on the distance value from the emission point to the shelter, the interval value of two laser emission devices and the rotary angle value of two laser emission devices respectively, the interval value on both sides of the shelter is calculated;Based on the distance value from the emission point to the shelter, the interval value of two laser emission devices and the interval value on both sides of the shelter, the width of the visual blind area is calculated by formula x={(b-s) / a}r+s, wherein a is the distance value from the emission point to the shelter, s is the interval value of two laser emission devices, A2 and A3 are the rotary angle values of two laser emission devices, b is the interval value on both sides of the shelter, x is the width of the visual blind area, r is the visibility test circle, and is a known quantity artificially set.

2. The field of view measurement device of claim 1, wherein, The bottom support device includes a base, a support seat, and an extendable telescopic component. The two ends of the telescopic component are respectively connected with the base and the support seat. The rotary seat is rotatably connected with the support seat.

3. The field of view measurement device of claim 2, wherein, The telescopic component is rotatably connected with the base, and the rotary axis of the telescopic component extends along the height direction of the bottom support device.

4. The field of view measurement device of claim 3, wherein, A rotary damping structure is provided between the telescopic component and the base to provide damping for the relative rotation of the telescopic component and the base.

5. The field of view measurement device of claim 1, wherein, A first scale disc corresponding to the first sliding seat is provided on the first sliding seat coaxially with the rotary table.

6. The field of view measurement device of claim 1, wherein, A second sliding seat is slidably connected with the rotary seat, and the displacement direction of the second sliding seat is perpendicular to the height direction of the bottom support device. The distance measuring device is provided on the second sliding seat.

7. The field of view measurement device of claim 1, wherein, The support rod is connected with the bottom support device, and the rotating seat is rotatably sleeved on the support rod.

8. The field of view measurement device of claim 2, wherein, The second scale dial is further included. The bottom support device and / or the rotating seat is provided with the second scale dial, and the second scale dial is coaxial with the rotating axis of the rotating seat.

9. A method of measuring visual field, characterized by, The field measurement device is implemented based on any one of claims 1-8, comprising: The height of the bottom support device is adjusted based on the SIP point, and the irradiation pitch angle of the laser emitting device is adjusted by rotating the rotating seat; The distance value between the emitting point and the shelter is detected by using the distance measuring device; The two laser emitting devices are rotated, and the light emitted by the two laser emitting devices respectively coincides with the boundary of the corresponding side of the shelter; The interval value of the two sides of the shelter is calculated based on the distance value between the emitting point and the shelter, the interval value of the two laser emitting devices, and the rotating angle value of the two laser emitting devices respectively; The field of view blind area width is calculated based on the distance value between the emitting point and the shelter, the interval value of the two laser emitting devices, and the interval value of the two sides of the shelter.

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