Optical device for two-dimensional angle attitude measurement and measurement method

Abstract

The invention provides an optical device for two-dimensional angle attitude measurement and a measurement method, and belongs to the technical field of optical measurement. The optical device comprises a control system, a box body, a notch, a camera and an optical screen, wherein the notch is formed in the box body and is used for placing an object to be measured; the camera is fixedly arranged on one side, far away from the notch, in the box body and is used for acquiring images; the optical screen is arranged on one side, close to the notch, of the camera and is fixedly connected with the box body; the light source structure is arranged in the box body and close to one side of the notch and is used for emitting a light source; and the thin film interference optical structure is arranged between the light source structure and the optical screen and is used for refracting the light source emitted by the light source structure to an object to be measured and then reflecting the light source to the optical screen. By arranging the camera, the optical screen, the light source structure and the film interference optical structure, stable transmission and reflection of light can be ensured, high-precision measurement of the two-dimensional angle attitude of the to-be-measured object is realized, and an accurate measurement result is provided.

Description

Technical Field

[0001] The present invention belongs to the technical field of optical measurement, and in particular relates to an optical device and a measurement method for two-dimensional angle posture measurement. Background Art

[0002] With the rapid development of modern science and technology, accurate measurement of object angles and postures has become particularly important in many fields such as aerospace, precision manufacturing, and automated control.

[0003] Traditional angle measurement methods, such as mechanical goniometers and contact measuring tools, while able to meet some measurement needs, have limitations in terms of accuracy, ease of use, and impact on the measurement environment. Contact measuring tools, due to direct contact with the object being measured, can generate measuring forces, which can cause slight deformations in the object, thus affecting the accuracy of the measurement results. Furthermore, the accuracy of mechanical goniometers is limited by factors such as the design and manufacturing precision of their mechanical structure, as well as wear and tear during use. Over time, these mechanical components may become loose and worn, leading to a decrease in measurement accuracy. Summary of the Invention

[0004] The purpose of the present invention is to provide an optical device and a measurement method for two-dimensional angular posture measurement in order to overcome the above technical problems, which are used for two-dimensional angular posture measurement and have the advantages of non-contact and high precision.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] An optical device for two-dimensional angular posture measurement, comprising: a box having a slot for placing a plane reflector, a camera for collecting images, a light screen, a light source structure, and a thin-film interference optical structure installed in the box, the camera being installed in the box on a side away from the slot, the light source structure being installed in the box on a side close to the slot, a thin-film interference optical structure being provided between the light source structure and the light screen, the light screen being located between the camera and the thin-film interference optical structure, and the thin-film interference optical structure refracting light emitted by the light source structure onto an object to be measured and then reflecting it onto the light screen.

[0007] Furthermore, the light source structure includes a laser arranged in the box on a side away from the camera and a first adjustment mechanism arranged in the box for adjusting the angle of the laser, and the first adjustment mechanism is connected to the output end of the control system.

[0008] Furthermore, the first adjustment mechanism includes a first bracket fixedly installed in the box, the first bracket is rotatably connected to a first gear, the first gear is connected to a first servo motor, the first servo motor is connected to an output end of the control system, the first servo motor is fixedly installed on one side of the first bracket, the first gear is meshed with a first half gear, a mounting base is fixed on the first half gear, and a laser is installed on the mounting base.

[0009] Furthermore, the thin film interference optical structure includes the plane mirror, a prism is installed below the plane mirror, the prism is installed on a multi-dimensional adjustment mechanism, there is a plane mirror between the prism and the light screen, the plane mirror is installed on a second adjustment mechanism, and the multi-dimensional adjustment mechanism and the second adjustment mechanism are respectively connected to the output end of the control system.

[0010] Furthermore, a sliding groove is provided on the box body at a position corresponding to the multi-dimensional adjustment mechanism.

[0011] Furthermore, the multi-dimensional adjustment mechanism includes a slider installed in the slide groove and moving laterally, a servo electric cylinder is fixedly connected to one side of the inside of the slide groove, the servo electric cylinder is connected to the output end of the control system, the servo electric cylinder is connected to the guide rod, the slider is installed on the guide rod, and the slider is connected to the connecting seat.

[0012] Furthermore, a rotating shaft is installed on the connecting seat, a clamping seat is installed on the upper end of the rotating shaft, the lower end of the rotating shaft is connected to the worm wheel, the worm wheel is engaged with the worm, the worm is connected to the drive motor, and the drive motor is connected to the output end of the control system.

[0013] Furthermore, the second adjustment mechanism includes a second bracket, the second bracket is rotatably connected to a second gear, the second gear is connected to a second servo motor, the second servo motor is connected to the output end of the control system, the second gear is engaged with a second half gear, the second half gear is connected to a fixed seat, and the plane mirror is mounted on the fixed seat.

[0014] The present invention also includes:

[0015] A method for measuring an optical device for two-dimensional angle posture measurement, comprising the following steps:

[0016] When in use, the object to be measured is fixed on the plane reflector, and the plane reflector is placed in the notch, and the control system is started. At this time, the control system will first send a corresponding signal to start the multi-dimensional adjustment mechanism to adjust the prism to be parallel to the plane reflector on the object to be measured;

[0017] After the adjustment is completed, the control system will send a corresponding signal to start the first adjustment mechanism, adjust the angle of the laser, and ensure that the light source can illuminate the appropriate position. At the same time, the control system will operate the multi-dimensional adjustment mechanism to adjust the angle of the prism to ensure that the light emitted by the laser can be refracted by the prism and accurately illuminate the plane reflector of the object to be measured. In the process of the prism refracting the light, the control system will start the second adjustment mechanism to adjust the angle of the plane mirror to ensure that the light reflected by the prism can be refracted onto the light screen. When the light screen receives the light reflected from the plane mirror, the camera will automatically capture the image refracted on the light screen. Finally, the image captured by the camera can be used for subsequent analysis and processing.

[0018] The beneficial effects of the present invention are:

[0019] The optical device of the present invention can ensure the stable transmission and reflection of light by arranging a camera, a light screen, a light source structure and a thin film interference optical structure, realize high-precision measurement of the two-dimensional angular posture of the object to be measured, and provide accurate measurement results.

[0020] The optical device of the present invention can effectively avoid external interference and light reflection interference by setting up a box, providing a stable measurement environment. At the same time, key components such as the camera, light source structure, light screen and thin-film interference optical structure are integrated into a box, making the entire system compact and easy to deploy.

[0021] The optical device of the present invention can realize automatic and precise adjustment of the angles of the laser, prism and plane mirror by providing a first adjustment mechanism, a multi-dimensional adjustment mechanism and a second adjustment mechanism to meet different measurement requirements.

[0022] The present invention uses a camera, a light screen, a light source structure and a thin-film interference optical structure to ensure the stable transmission and reflection of light, achieve high-precision measurement of the two-dimensional angular posture of the object to be measured, and provide accurate measurement results. The design of the box can effectively avoid external interference and light reflection interference, providing a stable measurement environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Attachment Figure 1 It is a structural schematic diagram of the present invention.

[0024] Attachment Figure 2 This is the appearance diagram of the present invention from the first angle.

[0025] Attachment Figure 3 This is the appearance diagram of the present invention from the second angle.

[0026] Attachment Figure 4 It is a structural schematic diagram of the light source structure of the present invention.

[0027] Attachment Figure 5It is a structural schematic diagram of the prism and multi-dimensional adjustment mechanism of the present invention.

[0028] Attachment Figure 6 It is a structural schematic diagram of the multi-dimensional adjustment mechanism of the present invention.

[0029] Attachment Figure 7 It is a structural schematic diagram of the plane mirror and the second adjustment mechanism of the present invention.

[0030] Attachment Figure 8 It is a flow chart of the control system of the present invention.

[0031] In the accompanying drawings: 1, box body; 11, notch; 12, slide;

[0032] 2. Light source structure; 21. Laser; 22. First adjustment mechanism; 221. First bracket; 222. First gear; 223. First servo motor; 224. First half gear; 225. Mounting base;

[0033] 3. Thin-film interference optical structure; 31. Prism; 32. Multi-dimensional adjustment mechanism; 321. Slider; 322. Guide rod; 323. Servo cylinder; 324. Connecting seat; 325. Clamping seat; 326. Rotating shaft; 327. Worm gear; 328. Worm; 329. Drive motor; 33. Plane mirror; 34. Second adjustment mechanism; 341. Second bracket; 342. Second gear; 343. Second servo motor; 344. Second half gear; 345. Fixing seat; 35. Plane mirror;

[0034] 4. Light screen;

[0035] 5. Camera;

[0036] 6. Object to be measured. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings.

[0038] The present invention provides an optical device for two-dimensional angle posture measurement, as shown in the attached Figure 1-2 As shown, the optical device includes a control system, a box 1, a slot 11 provided on the box 1 for placing an object to be measured, a camera 5 fixedly arranged in the box 1 on a side away from the slot 11 for capturing images, a light screen 4 arranged on a side of the camera 5 close to the slot 11 and fixedly connected to the box 1, a light source structure 2 arranged in the box 1 close to the slot 11 for emitting light, and a thin film interference optical structure 3 arranged between the light source structure 2 and the light screen 4 for refracting the light emitted by the light source structure 2 onto the object to be measured and then reflecting it onto the light screen 4.

[0039] In this embodiment, by using a camera, a light screen, a light source structure and a thin-film interference optical structure, stable transmission and reflection of light can be ensured, high-precision measurement of the two-dimensional angular posture of the object to be measured can be achieved, and accurate measurement results can be provided. The design of the box can effectively avoid external interference and light reflection interference, providing a stable measurement environment. At the same time, key components such as the camera, light source structure, light screen and thin-film interference optical structure are integrated inside a box, making the entire system compact and easy to deploy.

[0040] As attached Figure 4 As shown, the light source structure 2 includes a laser 21 arranged in the box 1 on a side away from the camera 5 and a first adjustment mechanism 22 arranged in the box 1 for adjusting the angle of the laser 21. The first adjustment mechanism 22 is connected to the output end of the control system.

[0041] Specifically, the first adjustment mechanism 22 includes a first bracket 221 fixedly installed in the box 1 at a position corresponding to the bottom of the laser 21, a first gear 222 rotatably connected to the first bracket 221, a first half gear 224 rotatably connected to the first bracket 221 at a position corresponding to the top of the first gear 222 and engaged with the first gear 222, a mounting base 225 fixedly installed on the side of the first half gear 224 away from the first gear 222 and fixedly connected to the laser 21, and a first servo motor 223 fixedly installed on one side of the first bracket 221 for driving the first gear 222 to rotate, and the first servo motor 223 is connected to the output end of the control system.

[0042] In this embodiment, the first adjustment mechanism realizes the adjustability of the light source angle. The design of the first adjustment mechanism allows the angle of the laser to be precisely adjusted to adapt to objects to be measured of different shapes, sizes and positions, and ensures that the light is irradiated onto the object to be measured in the best manner, thereby optimizing image acquisition and subsequent processing and analysis.

[0043] As attached Figure 1 、 5 As shown, the thin film interference optical structure 3 includes a prism 31 arranged at a position corresponding to the notch 11 in the box 1, a multi-dimensional adjustment mechanism 32 arranged on the box 1 for adjusting the angle and horizontal position of the prism 31, a plane mirror 33 arranged between the prism 31 and the light screen 4, and a second adjustment mechanism 34 arranged in the box 1 for adjusting the angle of the plane mirror 33. The multi-dimensional adjustment mechanism 32 and the second adjustment mechanism 34 are both connected to the output end of the control system, and the plane reflector 35 is fixed on the object to be measured.

[0044] In this embodiment, the multi-dimensional adjustment mechanism 32 and the second adjustment mechanism 34 enable the prism and the plane mirror to be precisely adjusted to control the incident angle and reflection path of the light, thereby improving the accuracy and reliability of the measurement, while also being able to adapt to different measurement requirements.

[0045] When the angle of the light source emitted by the laser 21 needs to be adjusted, the control system will send a corresponding signal to the first servo motor 223. At this time, the first servo motor 223 will drive the first gear 222 connected to it to rotate a certain angle or number of turns. Since the first half gear 224 is engaged with the first servo motor 223 and the first half gear 224 is fixedly connected to the laser 21 through the mounting base 225, when the first gear 222 rotates a certain angle or number of turns, the first half gear 224 can synchronously drive the laser 21 to rotate a certain angle, thereby realizing automatic adjustment of the angle of the laser 21 to meet different measurement requirements.

[0046] In this embodiment, the combined design of the first bracket, the first servo motor, the first gear, the first half gear and the mounting base enables the angle adjustment of the laser to be extremely accurate without the need for manual intervention, thereby improving the efficiency and accuracy of the measurement.

[0047] As attached Figure 3 As shown, in order to facilitate the installation and use of the multi-dimensional adjustment mechanism 32, a slide groove 12 is opened at the position of the box 1 corresponding to the multi-dimensional adjustment mechanism 32; the slide groove 12 provides the multi-dimensional adjustment mechanism 32 with precise installation position and direction guidance, making the installation process simpler and faster.

[0048] As attached Figure 6 As shown, the multi-dimensional adjustment mechanism 32 includes a slider 321 that moves laterally in the slide 12, a servo electric cylinder 323 fixedly connected to one side of the slide 12 for driving the slider 321 to move, a guide rod 322 fixedly installed in the slide 12 and passing through the slider 321, a connecting seat 324 set in the box 1 and fixedly connected to the slider 321, and a clamping seat 325 set in the box 1 at a position above the corresponding connecting seat 324 and fixedly connected to the bottom side of the prism 31. The slider 321 is slidably sleeved on the guide rod 322, and the servo electric cylinder 323 is fixedly installed in the slide 12 and passes through the slider 321. Connected to the output end of the control system, the multi-dimensional adjustment mechanism 32 also includes a rotating shaft 326 that longitudinally passes through the connecting seat 324 and is rotatably connected to the connecting seat 324, a worm gear 327 is arranged in the connecting seat 324 and fixedly sleeved on the rotating shaft 326, a worm 328 is rotatably connected in the connecting seat 324 and meshed with the worm gear 327, and a drive motor 329 fixedly installed on one side of the connecting seat 324 for driving the worm 328 to rotate. The top of the rotating shaft 326 is fixedly connected to the bottom of the card seat 325, and the drive motor 329 is connected to the output end of the control system.

[0049] In this embodiment, the combined design of the servo electric cylinder, guide rod, slider, connecting seat and clamping seat enables the lateral movement of the slider in the slide groove to have high precision, thereby ensuring the precise position control of the prism in the horizontal direction and meeting the optical measurement system's demand for high-precision angle adjustment.

[0050] When the refraction angle of the prism 31 needs to be adjusted, the control system will send corresponding signals to the servo cylinder 323 and the drive motor 329. Among them, the servo cylinder 323 will be able to stably drive the slider 321 to move horizontally in the slide groove 12 under the guidance of the guide rod 322. Since the slider 321 is connected to the connecting seat 324, and the connecting seat 324 is connected to the clamping seat 325 through the rotating shaft 326, and the clamping seat 325 is fixedly connected to one side of the prism 31, therefore, as the slider 321 moves horizontally, the prism 31 can move stably, thereby realizing automatic adjustment of the horizontal direction of the prism 31. In addition, the drive motor 329 will drive the worm 328 to rotate. Since the worm 328 is engaged with the worm wheel 327 connected to the rotating shaft 326, therefore, when the drive motor 329 drives the worm 328 to rotate a certain number of circles or angles, the rotating shaft 326 can drive the prism 31 to rotate a certain angle, thereby realizing automatic adjustment of the vertical angle of the prism 31.

[0051] In this embodiment, precise angle adjustment of the prism can be achieved through the driving of the driving motor and the meshing transmission of the worm gear and the worm, thereby improving the accuracy of measurement.

[0052] As attached Figure 7 As shown, the second adjustment mechanism 34 includes a second bracket 341 fixedly installed in the box 1 and between the prism 31 and the light screen 4, a second gear 342 rotatably connected to the second bracket 341, a second half gear 344 rotatably connected to the second bracket 341 at a position above the second gear 342 and engaged with the second gear 342, a fixing base 345 fixedly installed on the side of the second half gear 344 away from the second gear 342 and fixedly connected to the plane mirror 33, and a second servo motor 343 fixedly installed on one side of the second bracket 341 for driving the second gear 342 to rotate, and the second servo motor 343 is connected to the output end of the control system.

[0053] When the reflection angle of the plane mirror 33 needs to be adjusted, the control system will send a corresponding signal to the second servo motor 343. At this time, the second servo motor 343 will drive the second gear 342 connected to it to rotate. Since the second gear 342 is engaged with the second half gear 344, and the second half gear 344 is fixedly connected to the plane mirror 33 through the fixing seat 345, when the second servo motor 343 drives the second gear 342 to rotate a certain angle or number of turns, the second half gear 344 can drive the plane mirror 33 to rotate a certain angle, thereby realizing automatic adjustment of the angle of the plane mirror 33.

[0054] In this embodiment, the combined design of the second bracket, the second gear, the second half gear, the second servo motor and the fixed seat enables the angle adjustment of the plane mirror to be extremely accurate without the need for manual intervention, thereby improving the efficiency and accuracy of the measurement.

[0055] As attached Figure 8 As shown, the control system in this embodiment controls the first adjustment mechanism, the second adjustment mechanism and the XY axis adjustment mechanism.

[0056] This embodiment also includes:

[0057] A method for measuring an optical device for two-dimensional angle posture measurement, comprising the following steps:

[0058] During use, the object to be measured 6 is fixed on the plane reflector 3, and the plane reflector 3 is placed at the slot 11, and the control system is started. At this time, the control system will first send a corresponding signal to start the multi-dimensional adjustment mechanism 32, so that the adjustment prism 31 is parallel to the plane reflector 35 on the object to be measured. After the adjustment is completed, the control system will send a corresponding signal to start the first adjustment mechanism 22 to adjust the angle of the laser 21 to ensure that the light source can illuminate the appropriate position. At the same time, the control system will operate the multi-dimensional adjustment mechanism 32 to adjust the angle of the prism 31 to ensure that the light emitted by the laser 21 can be refracted by the prism 31 and accurately illuminate the plane reflector 35 of the object to be measured. In the process of refracting the light by the prism 31, the control system will start the second adjustment mechanism 34 to adjust the angle of the plane mirror 33 to ensure that the light reflected by the prism 31 can be refracted onto the light screen 4. When the light screen 4 receives the light reflected from the plane mirror 33, the camera 5 will automatically capture the image refracted on the light screen 4. Finally, the image captured by the camera 5 can be subsequently analyzed and processed.

[0059] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An optical device for two-dimensional angle posture measurement, characterized in that: include: A box (1) is provided with a slot (11) for placing a plane reflector (35); a camera (5) for collecting images, a light screen (4), a light source structure (2), and a thin film interference optical structure (3) are installed in the box (1); the camera (5) is installed in the box (1) on a side away from the slot (11); the light source structure (2) is installed in the box (1) on a side close to the slot (11); a thin film interference optical structure (3) is provided between the light source structure (2) and the light screen (4); the light screen (4) is located between the camera (5) and the thin film interference optical structure (3); the thin film interference optical structure (3) refracts the light emitted by the light source structure (2) onto the object to be measured and then reflects it onto the light screen (4).

2. The optical device for two-dimensional angle posture measurement according to claim 1, characterized in that: The light source structure (2) comprises a laser (21) arranged in the housing (1) on a side away from the camera (5), and a first adjustment mechanism (22) arranged in the housing (1) for adjusting the angle of the laser (21), wherein the first adjustment mechanism (22) is connected to the output end of the control system.

3. The optical device for two-dimensional angle posture measurement according to claim 2, characterized in that: The first adjustment mechanism (22) comprises a first bracket (221) fixedly mounted in the housing (1); a first gear (222) is rotatably connected to the first bracket (221); the first gear (222) is connected to a first servo motor (223); the first servo motor (223) is connected to an output end of the control system; the first servo motor (223) is fixedly mounted on one side of the first bracket (221); the first gear (222) is meshed with a first half gear (224); a mounting seat (225) is fixed on the first half gear (224); and a laser (21) is mounted on the mounting seat (225).

4. The optical device for two-dimensional angle posture measurement according to claim 1, characterized in that: The thin film interference optical structure (3) includes the plane reflector (35), a prism (31) is installed below the plane reflector (35), the prism (31) is installed on a multi-dimensional adjustment mechanism (32), a plane mirror (33) is provided between the prism (31) and the light screen (4), the plane mirror (33) is installed on a second adjustment mechanism (34), and the multi-dimensional adjustment mechanism (32) and the second adjustment mechanism (34) are respectively connected to the output end of the control system.

5. The optical device for two-dimensional angle posture measurement according to claim 4, characterized in that: The box body (1) is provided with a sliding groove (12) at a position corresponding to the multi-dimensional adjustment mechanism (32).

6. The optical device for two-dimensional angle posture measurement according to claim 3, characterized in that: The multi-dimensional adjustment mechanism (32) includes a slider (321) installed in the slide groove (12) and capable of transverse movement. A servo electric cylinder (323) is fixedly connected to one side of the interior of the slide groove (12). The servo electric cylinder (323) is connected to the output end of the control system. The servo electric cylinder (323) is connected to a guide rod (322). The slider (321) is installed on the guide rod (322). The slider (321) is connected to a connecting seat (324).

7. The optical device for two-dimensional angle posture measurement according to claim 6, characterized in that: A rotating shaft (326) is mounted on the connecting seat (324), a clamping seat (325) is mounted on the upper end of the rotating shaft (326), a lower end of the rotating shaft (326) is connected to a worm gear (327), the worm gear (327) is engaged with a worm (328), the worm (328) is connected to a driving motor (329), and the driving motor (329) is connected to the output end of the control system.

8. The optical device for two-dimensional angle posture measurement according to claim 4, characterized in that: The second adjustment mechanism (34) includes a second bracket (341), a second gear (342) is rotatably connected to the second bracket (341), the second gear (342) is connected to a second servo motor (343), the second servo motor (343) is connected to the output end of the control system, the second gear (342) is meshed with a second half gear (344), the second half gear (344) is connected to a fixed seat (345), and the plane mirror (33) is installed on the fixed seat (345).

9. A method for measuring an optical device for two-dimensional angle posture measurement according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: When in use, the object to be measured (6) is fixed on the plane reflector (3), and the plane reflector (3) is placed at the notch (11), and the control system is started. At this time, the control system first sends a corresponding signal to start the multi-dimensional adjustment mechanism (32), so that the adjustment prism (31) and the plane reflector (35) on the object to be measured are in a parallel state; After the adjustment is completed, the control system will send a corresponding signal to start the first adjustment mechanism (22) to adjust the angle of the laser (21) to ensure that the light source can illuminate the appropriate position. At the same time, the control system will operate the multi-dimensional adjustment mechanism (32) to adjust the angle of the prism (31) to ensure that the light emitted by the laser (21) can be accurately irradiated onto the plane reflector (35) of the object to be measured through the refraction of the prism (31). In the process of the prism (31) refracting the light, the control system will start the second adjustment mechanism (34) to adjust the angle of the plane mirror (33) to ensure that the light reflected by the prism (31) can be refracted onto the light screen (4). When the light screen (4) receives the light reflected from the plane mirror (33), the camera (5) will automatically collect the image refracted on the light screen (4). Finally, the image collected by the camera (5) can be subsequently analyzed and processed.

Images