A hollow laser beam directional turntable

Abstract

This utility model relates to the fields of photoelectric root search and laser direction finding. A hollow laser beam direction finding turntable includes a base and a rotating platform. The rotating platform is rotatably mounted on the base via an azimuth axis. The rotating platform has a pitch axis, with its two ends connected to a laser emitting unit and a photoelectric functional unit, respectively. The azimuth axis is a hollow structure, allowing the laser beam emitted by a laser located below the base to pass through. The rotating platform is also hollow, housing a first reflecting mirror assembly. The laser emitting unit contains a second reflecting mirror assembly and an emitting lens tube. The laser beam passes through the first and second reflecting mirror assemblies and exits from the emitting lens tube. This utility model, through a reasonable layout of the laser's position and optical path, ensures that the laser does not move with the rotating components, resulting in a relatively small moment of inertia. The device's start-up, stop, and root search / following responses are sensitive, effectively improving the direction finding accuracy of large-diameter laser beams.

Description

Technical Field

[0001] This utility model relates to the fields of photoelectric root search and laser orientation, specifically to a hollow laser beam orientation turntable. Background Technology

[0002] Laser generators with large-diameter, high-power laser beams are generally large in mass and volume. Existing turntables, which carry large-mass, large-volume lasers and rotate with the two-dimensional turntable, have very large moments of inertia in the rotating parts of the equipment. This requires the selection of high-torque motors, and the equipment starts and stops slowly, which can easily lead to overshoot, resulting in a sluggish and insensitive system response and large errors in the directional accuracy of the emitted laser beam. Utility Model Content

[0003] The purpose of this invention is to provide a hollow laser beam directional turntable to solve some problems caused by the large moment of inertia of the rotating parts of the equipment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A hollow laser beam directional turntable includes a base and a rotating platform. The rotating platform is rotatably mounted on the base via an azimuth axis. The rotating platform has a pitch axis, with its two ends connected to a laser emitting unit and a photoelectric functional unit, respectively. The azimuth axis is a hollow structure for allowing a laser beam emitted by a laser located below the base to pass through. The rotating platform is also hollow, and a first reflector assembly is located inside the rotating platform. The laser emitting unit has a second reflector assembly and an emitting lens tube. The laser beam passes through the first and second reflector assemblies and is then emitted from the emitting lens tube.

[0006] Furthermore, the azimuth axis is assembled with the housing of the base via bearings, and a slip ring is sleeved inside the azimuth axis.

[0007] Furthermore, the lower end of the base is connected to the pedestal, and the laser is provided in the pedestal, with the laser beam emission direction coaxial with the azimuth axis.

[0008] Furthermore, the pitch axis includes a left axis segment and a right axis segment that rotate synchronously. The left end of the left axis segment is connected to the laser emitting unit, and the left end of the right axis segment is connected to the photoelectric functional unit.

[0009] Furthermore, the first reflector assembly is inclined relative to the rotation axis of the pitch axis. The first reflector assembly includes a first reflector and a first reflector mounting base. The first reflector mounting base is provided with lugs on both sides, and the lugs are provided with connecting holes. The lugs are connected to the support part in the rotating table by screws. The connecting holes include threaded holes and light holes.

[0010] Furthermore, a left support arm is connected to the right side of the left shaft segment, and a right support arm is connected to the left side of the right shaft segment. The left support arm and the right support arm are connected by a horizontal plate to form a U-shaped structure.

[0011] Furthermore, the first reflector assembly includes a first reflector, and the second reflector assembly includes a second reflector, with the reflector surfaces of the first reflector and the second reflector being arranged in parallel.

[0012] Furthermore, the azimuth axis is driven by an azimuth motor located in the base, and the pitch axis is driven by a pitch motor located in the rotary table. Both the azimuth motor and the pitch motor are frameless motors.

[0013] Furthermore, the rotating platform is sealed with a hatch above the pitch frame, and the outer side of the hatch is an arc-shaped surface.

[0014] Furthermore, an electrical interface is provided on one side of the base, a cover plate is provided on the outside of the electrical interface, and a wiring groove is provided on the side of the base near its inner wall.

[0015] The beneficial effects of this utility model are:

[0016] This invention does not place a large-mass, large-volume laser in the rotating component, i.e., the rotating platform. The large-diameter, high-power laser beam enters from outside the equipment and exits after being reflected by the internal reflector. The rotating component has a relatively small moment of inertia, and the equipment is sensitive in starting, stopping, and root-searching and following, which can effectively improve the directional accuracy of the large-diameter laser beam. Attached Figure Description

[0017] Figure 1 This is an external view of the hollow laser beam directional turntable of this utility model;

[0018] Figure 2 This is a cross-sectional view of the hollow laser beam directional turntable of this utility model;

[0019] Figure 3 This is a structural diagram of the first reflecting mirror assembly;

[0020] Figure 4 This is a top view of the first reflector assembly in its installed state on the rotating platform;

[0021] Figure 5 This is a schematic diagram of the second reflector being installed inside the emission tube;

[0022] Figure 6 This is a structural diagram of the second reflector assembly.

[0023] 1. Base; 11. Azimuth pivot; 12. Azimuth motor; 13. Base; 13. Wiring channel; 14. Slip ring; 2. Rotating table; 21. Pitch pivot; 211. Left axis section; 212. Right axis section; 213. Left support arm; 214. Horizontal plate; 215. Right support arm; 23. First reflector assembly; 231. First reflector; 232. Base; 233. Hanging lug; 234. First reflector cover; 24. Pitch motor; 25. Pitch frame; 251. Hood; 252. Support; 3. Laser emitting unit; 31. Emitting lens tube; 32. Second reflector assembly; 321. Second reflector; 322. Second reflector cover; 33. Light emission window; 4. Photoelectric functional unit. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0025] Embodiments of this utility model:

[0026] like Figures 1-6 As shown, a hollow laser beam orientation turntable includes a base 1 and a rotating platform 2. The rotating platform 2 is rotatably mounted on the base 1 via an azimuth axis. The rotating platform 2 is provided with a pitch axis 21. The rotating platform 2 can rotate around the azimuth axis and can also perform pitching motions on the pitch axis 21, forming a two-dimensional turntable.

[0027] like Figure 2 As shown, the azimuth axis is assembled to the housing of the base 1 via bearings. The azimuth axis has a hollow structure, and a slip ring 14 is fitted inside it. The azimuth axis is driven by an azimuth motor 12 located in the base 1. The azimuth motor 12 is a frameless motor, and the two are coaxially assembled, making the structure compact. The slip ring 14 forms a relatively large vertical through space inside, which is used to allow the laser beam emitted by the laser located below the base 1 to pass upward.

[0028] The base 1 is a cylindrical structure, with its lower end used for connection to the base via a flange. The laser is housed within the base, and the laser beam's emission direction is coaxial with the azimuth axis. In this invention, the laser is not housed within the rotating platform 2, thereby effectively reducing the rotational inertia of the rotating platform 2 during its operation and facilitating start-stop control.

[0029] like Figure 2As shown, the two ends of the pitch axis 21 are connected to the laser emitting unit 3 and the photoelectric functional unit 4, respectively. The pitch axis 21 includes a left axis segment 211 and a right axis segment 212. The left end of the left axis segment 211 is connected to the laser emitting unit 3, and the left end of the right axis segment 212 is connected to the photoelectric functional unit 4. The right side of the left axis segment 211 is connected to the left support arm 213, and the left side of the right axis segment 212 is connected to the right support arm 215. The left support arm 213 and the right support arm 215 are connected by a horizontal plate 214 to form a U-shaped structure. The pitch frame 25 is a U-shaped structure, and the length of the right support arm 215 is greater than the length of the left support arm 213. Both the left axis segment 211 and the right axis segment 212 are cylindrical structures with hollow interiors. The inner diameter of the left axis segment 211 is larger than the inner diameter of the right axis segment 212 because the inner hole of the left axis segment 211 is to pass through the laser beam, thus accommodating a large-diameter laser beam.

[0030] The pitch axis 21 is driven by the pitch motor 24 located on the right side of the rotary table 2. The pitch motor 24 is also a frameless motor. The rotor part of the pitch motor 24 is connected to the right shaft section 212. The left shaft section 211 and the right shaft section 212 are respectively assembled in the rotary table 2 through corresponding bearings. The left shaft section 211 and the right shaft section 212 can rotate synchronously.

[0031] like Figures 3-4 As shown, the rotating platform 2 has a hollow structure, and a first reflector assembly 23 is installed inside the rotating platform 2. The first reflector assembly 23 is located on the pitch frame 25 of the rotating platform 2, which is the main shell part of the rotating platform 2. The first reflector assembly 23 includes a first reflector 231 and a first reflector mounting base. The first reflector is inclined relative to the rotation axis of the pitch axis 21, preferably at a 45-degree angle. The first reflector mounting base includes a base body 232 and a first reflector cover 234. The first reflector 231 is installed in the groove of the base body 232, and two first reflector covers 234 are connected to both sides of the base body 232 by screws to press the first reflector 231. The front and rear sides of the base body 232 are provided with lugs 233, and the lugs 233 are provided with connecting holes. The lugs 233 are connected to the support part 252 on the pitch frame 25 by screws. Each side of the connection hole includes a threaded hole and a smooth hole. The screw that mates with the threaded hole is used to tighten the hole. The smooth hole can be a blind hole. One end of the screw is pressed against the base 232. The screw that mates with the threaded hole and the screw that mates with the smooth hole are used to finely adjust the angle of the first reflector 231.

[0032] The laser emitting unit 3 is provided with a second reflector assembly 32 and an emitting lens tube 31. The laser beam is emitted from the emitting lens tube 31 after passing through the first reflector assembly 23 and the second reflector assembly 32.

[0033] like Figures 5-6As shown, the second reflector assembly 32 includes a second reflector 321, and the reflective surfaces of the first reflector 231 and the second reflector 321 are arranged parallel to each other. One side of the reflective surface of the first reflector 231 faces the base 1. The second reflector 321 is installed in the groove of the emitting mirror tube 31 and is pressed tightly by the second reflector cover 322. The laser beam emission direction is coaxial with the azimuth rotation axis 11. After being reflected by the first reflector 231, the laser beam is incident on the mirror surface of the second reflector 321 for a second reflection and is emitted through the light exit window 33. The laser beam is reflected twice inside the hollow turntable, and the directional emission of a large-diameter laser beam is achieved by controlling the rotation of the two-dimensional axis system of the turntable.

[0034] The optoelectronic functional unit 4, the structure and principle of which are not innovative points of this utility model, is a conventional setting of this type of product, and its specific composition is not limited in this utility model. It mainly includes a visible light camera, an infrared thermal imager, and a lidar; the visible light camera is used to capture visible light images and provide clear visual information during the day; the infrared thermal imager generates a thermal image by receiving the infrared energy radiated by the target, and realizes target identification at night or in bad weather; the lidar is used for ranging, positioning and dynamic tracking of high-speed targets (such as drones), and works with the radar to achieve all-round monitoring, and can output target coordinates or azimuth / pitch guidance information.

[0035] like Figure 2 As shown, the rotating platform 2 is sealed with a hatch 251 above the pitch frame 25. The outer side of the hatch 251 is an arc-shaped surface, which does not produce water accumulation and is conducive to the sealing of the inside of the pitch frame 25.

[0036] An electrical interface is located on one side of the base 1, and a cover plate is provided on the outside of the electrical interface, which can be connected by screws. After removing and pulling out the cover plate, the internal aviation connector can be plugged in, unplugged, and locked. A wiring groove 13 is provided on the side of the base 1 near its inner wall, allowing external power supply and communication to enter from the bottom of the device. The wiring groove 13 is located on the hollow outer side of the base 1, avoiding the optical passage space of the laser beam. A cable reel is provided at the bottom of the base 1, with redundant wires loosely coiled on the cable reel, which ensures sufficient cable redundancy when the cover plate is pulled out, effectively preventing the wires from falling off the aviation connector due to gravity.

[0037] Features of this utility model:

[0038] The large-diameter, high-power laser beam enters from outside the equipment. The rotating parts of the equipment do not contain large-mass, large-volume lasers. The rotational inertia of the rotating parts is relatively small. The equipment is sensitive in starting, stopping, and root-searching and following, which can effectively improve the directional accuracy of the large-diameter laser beam.

Claims

1. A hollow laser beam directional turntable, characterized in that: The device includes a base and a rotating platform. The rotating platform is rotatably mounted on the base via an azimuth axis. The rotating platform has a pitch axis, with its two ends connected to a laser emitting unit and a photoelectric functional unit, respectively. The azimuth axis is a hollow structure, allowing the laser beam emitted by the laser located below the base to pass through. The rotating platform is also a hollow structure, and a first reflector assembly is located inside the rotating platform. The laser emitting unit has a second reflector assembly and an emitting lens tube. The laser beam passes through the first and second reflector assemblies and is then emitted from the emitting lens tube.

2. The hollow laser beam directional turntable according to claim 1, characterized in that: The azimuth axis is assembled to the housing of the base via bearings, and a slip ring is fitted inside the azimuth axis.

3. The hollow laser beam directional turntable according to claim 1, characterized in that: The lower end of the base is connected to the pedestal, and the laser is provided in the pedestal. The laser beam emission direction is coaxial with the azimuth axis.

4. The hollow laser beam directional turntable according to claim 1, characterized in that: The pitch axis includes a left axis segment and a right axis segment that rotate synchronously. The left end of the left axis segment is connected to the laser emitting unit, and the left end of the right axis segment is connected to the photoelectric functional unit.

5. The hollow laser beam directional turntable according to claim 4, characterized in that: The first reflector assembly is inclined relative to the rotation axis of the pitch axis. The first reflector assembly includes a first reflector and a first reflector mounting base. The first reflector mounting base has lugs on both sides and connecting holes on the lugs. The lugs are connected to the support part in the rotating table by screws. The connecting holes include threaded holes and light holes.

6. The hollow laser beam directional turntable according to claim 4, characterized in that: The left support arm is connected to the right side of the left shaft segment, and the right support arm is connected to the left side of the right shaft segment. The left and right support arms are connected by a horizontal plate to form a U-shaped structure.

7. The hollow laser beam directional turntable according to claim 1, characterized in that: The first reflector assembly includes a first reflector, and the second reflector assembly includes a second reflector. The reflector surfaces of the first reflector and the second reflector are arranged in parallel.

8. The hollow laser beam directional turntable according to claim 1, characterized in that: The azimuth axis is driven by an azimuth motor located in the base, and the pitch axis is driven by a pitch motor located in the rotary table. Both the azimuth motor and the pitch motor are frameless motors.

9. The hollow laser beam directional turntable according to claim 4, characterized in that: The rotating platform is sealed with a hatch above the pitch frame, and the outer side of the hatch is an arc-shaped surface.

10. The hollow laser beam directional turntable according to claim 1, characterized in that: An electrical interface is provided on one side of the base, and a cover plate is provided on the outside of the electrical interface. A wiring groove is provided on the side of the base near its inner wall.

Images