Dynamic focusing obstacle removing laser head

By adopting dynamic focusing technology and stepper motor-controlled optical compensation in the laser head, the problems of large spot, low efficiency and safety hazards of existing laser heads in municipal applications are solved, achieving more efficient obstacle removal and Reduce the risk of accidental injury.

CN222386119UActive Publication Date: 2025-01-24SHENZHEN NEWTON ZENG MATERIAL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202421154273.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-24
Publication Date
2025-01-24
Estimated Expiration
2034-05-24

AI Technical Summary

Technical Problem

In urban applications in the municipal field, the light spot of the beam reaching the obstacle is relatively large, resulting in low efficiency and safety risks when clearing the obstacle.

Method used

It uses a dynamic focusing obstacle clearing laser head to achieve long-distance dynamic focusing through mechanical compensation and optical compensation. It combines a stepper motor to adjust the position of the dynamic focusing zoom lens to control the focus length, thereby achieving dynamic automatic focusing at different positions. .

Benefits of technology

The smaller convergence of the beam in the valid distance, obtaining higher laser density, improving the efficiency of obstacle removal, and reducing the risk of error injury.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the field of dynamically focused obstacle clearing laser heads, in particular to a dynamically focused obstacle clearing laser head. The technical problems that in the process of a dynamic focusing obstacle clearing laser head, due to the fact that two light path structures of a collimated laser beam and a manual / automatic focusing laser beam are mainly designed, when the laser head is applied to the municipal field and cities, an existing laser head light path structure determines that light spots of light beams reaching obstacles are large, the efficiency is low when the obstacles are cleared away, and the laser head is difficult to clean. And potential safety hazards also exist. According to the technical scheme, the dynamic focusing obstacle clearing laser head comprises a QBH interface; the laser further comprises a QBH installation base body and a beam-expanding biconcave lens. According to the optical path system, long-distance dynamic focusing is realized in a mechanical compensation and optical compensation mode, meanwhile, light spot output with a larger light outlet is obtained, the diameter of the light spot output at the output port of the optical path system is 64mm, and dynamic automatic focusing at different positions within 500m is achieved by adjusting the dynamic focusing zoom lens.
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Description

Technical Field

[0001] The utility model relates to the field of dynamically focused obstacle-clearing laser heads, in particular to a dynamically focused obstacle-clearing laser head. Background Art

[0002] Laser obstacle removal technology uses the high energy of laser to burn obstacles within a certain distance. Its application areas have extended from the initial removal of foreign objects such as hanging kites and plastic films in high-voltage transmission networks to the current municipal fields, such as the burning and removal of obstacles such as tree branches. High-voltage transmission networks are generally located in the wild, which is relatively open, and the number of obstacles to be removed is limited. The current laser head design structure can fully meet the use requirements. The existing laser head design mainly uses two optical path structures: collimated laser beam and manual / automatic focusing laser beam. However, in the municipal field and applications within cities, the existing laser head optical path structure determines that the light spot where the light beam reaches the obstacle is relatively large, which is not only inefficient when clearing obstacles, but also poses a safety hazard. Utility Model Content

[0003] In order to overcome the problem of dynamically focusing the obstacle-clearing laser head, the design mainly uses two optical path structures: collimated laser beam and manual / automatic focusing laser beam. However, in the municipal field and applications within cities, the existing laser head optical path structure determines that the light spot where the beam reaches the obstacle is relatively large, which not only leads to low efficiency in clearing obstacles, but also poses a safety hazard.

[0004] The technical solution of the utility model is: a dynamic focusing obstacle-clearing laser head, including a QBH interface; also including a QBH mounting base, a beam expanding biconcave lens, a mounting base, a dynamic focusing zoom lens holder, a dynamic focusing zoom lens, an intermediate connecting piece, a compensating focusing lens, a lens barrel, and a rear fixed focusing lens. The rear end of the QBH interface is connected to the QBH mounting base through an outer circle positioning guide structure, and a heat sink is arranged on the QBH mounting base. The output end of the QBH mounting base is installed with a beam expanding biconcave lens, the rear end of the QBH mounting base is connected with the mounting base with bolt threads, the dynamic focusing zoom lens holder is installed inside the mounting base, and the dynamic focusing zoom lens holder is slidably connected to the mounting base.

[0005] Preferably, the laser head uses a four-piece functional lens combination full transmission light path to avoid the influence of reflection and combined beam light path on the focusing effect of the final focused light beam, so that the light beam converges smaller within the effective distance, and a higher laser density can be obtained, which is conducive to the efficient removal of obstacles and the removal of moving objects. Beyond a certain distance, the light beam quickly becomes larger, which greatly reduces the power density, thereby reducing the risk of accidental injury from the laser.

[0006] Preferably, a dynamic focus and magnification changer is provided at the light input end of the dynamic focus and magnification changer lens holder, an intermediate connecting piece is connected to the rear end of the mounting base, a compensating focusing lens is provided at the light input end of the intermediate connecting piece, a lens barrel is threadedly connected to the rear end of the intermediate connecting piece, a spacer is provided at the rear end of the lens barrel, a rear fixed focusing lens is provided between the lens barrel and the spacer, an extended length is designed on the pressure ring of the output window lens, a dust cover is installed on the extended length, a heat dissipation structure is designed on the outside of the lens barrel, and the overall weight is reduced.

[0007] Preferably, a pressure ring is connected to the rear end of the lens barrel, an output window mirror is arranged between the spacer ring and the pressure ring, a dust cover is arranged on the outer side of the pressure ring, a cross roller guide is arranged between the mounting base and the dynamic focus and magnification lens seat, a ball screw nut is arranged at the top of the dynamic focus and magnification lens seat, a nut connector is threadedly connected between the dynamic focus and magnification lens seat and the ball screw nut, the position of the dynamic focus and magnification lens seat is adjusted by controlling the movement of the stepper motor, that is, the position of the dynamic focus and magnification lens seat is controlled to achieve control of the focal length, and a circular hole for installing a miniature proximity switch is designed on the mounting base as a reference point for movement.

[0008] Preferably, a stepping motor with a ball screw is arranged in the middle position of the rear end of the ball screw nut, a sealing cover is arranged at the top of the ball screw nut, a motor seat is arranged between the sealing cover and the ball screw nut, and a miniature proximity switch is arranged on the mounting base.

[0009] Preferably, a 42x super-telephoto optical lens of a zoom camera is provided on one side of the mounting base, a laser ranging sensor is provided on the other side of the mounting base, a control board is provided between the 42x super-telephoto optical lens of the zoom camera and the laser ranging sensor, and an electric pan / tilt is provided at the bottom of the control board.

[0010] Preferably, the beam expanding biconcave lens is made of Corning 7980, with a diameter of 15mm, R1=20.02mm, R2=18.19mm, and an anti-reflection film layer of 1070nm±10nm. The dynamic focus zoom lens is made of Corning 7980, with a diameter of 40mm, R1=60mm, R2=45.83mm, and an anti-reflection film layer of 1070nm±10nm. The beam expanding biconcave lens facilitates the expansion of the divergent light beam, and the dynamic focus zoom lens has a dynamic adjustment function of focusing the focal length.

[0011] Preferably, the compensating focusing mirror is made of Corning 7980, with a diameter of 65mm, R1=224.30mm, R2=89.98mm, and an anti-reflection film layer of 1070nm±10nm; the rear fixed focusing mirror is made of Corning 7980, with a diameter of 70mm, R1=1111.13mm, R2=185.13mm, and an anti-reflection film layer of 1070nm±10nm; the output window mirror is made of Corning 7980, with a diameter of 70mm, a thickness of 4mm, and an anti-reflection film layer of 1070nm±10n.

[0012] 1. Realize long-distance dynamic focusing through mechanical compensation and optical compensation, and obtain a larger spot output at the light outlet. According to the divergence angle of 130mrad of the commonly used 1000W fiber laser single-mode fiber in the market, the output spot diameter of the optical path system at the output port is 64mm. By adjusting the dynamic focus zoom lens, dynamic automatic focusing at different positions within 500 meters can be achieved;

[0013] 2. The position of the dynamic focus zoom lens holder is adjusted by controlling the movement of the stepper motor, that is, the position of the dynamic focus zoom lens is controlled to achieve control of the focal length. A circular hole for installing a micro proximity switch is designed on the mounting base as a reference point for movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure shows the overall structure of the dynamic focusing obstacle removal laser head of the utility model;

[0015] Figure 2 The schematic diagram of the installation of the three-dimensional structure of the dynamic focusing obstacle removal laser head dynamic focusing variable magnification lens holder of the utility model is shown;

[0016] Figure 3 The schematic diagram of the three-dimensional structure of the installation base of the dynamic focusing obstacle removal laser head of the utility model is shown;

[0017] Figure 4 The schematic diagram of the three-dimensional structure of the electric pan-tilt platform and the laser head installation of the dynamic focusing obstacle removal laser head of the utility model is shown;

[0018] Figure 5The following is a schematic diagram of the optical path structure of the dynamic focusing obstacle removal laser head of the utility model. Explanation of the reference numerals: 1. QBH interface; 2. QBH mounting base; 3. Beam expanding biconcave lens; 4. Mounting base; 5. Dynamic focus zoom lens holder; 6. Dynamic focus zoom lens; 7. Intermediate connector; 8. Compensation focusing lens; 9. Lens barrel; 10. Rear fixed focusing lens; 11. Spacer; 12. Output window lens; 13. Pressing ring; 14. Dust cover; 15. Cross roller guide; 16. Nut connector; 17. Stepping motor with ball screw; 18. Ball screw nut; 19. Motor seat; 20. Sealing cover; 21. Micro proximity switch; 22. 42x super telephoto optical lens of zoom camera; 23. Control panel; 24. Laser ranging sensor; 25. Electric pan / tilt. DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] See also Figure 1-2 The utility model provides an embodiment: a dynamic focusing obstacle-clearing laser head, including a QBH interface 1; also including a QBH mounting base 2, a beam expanding biconcave lens 3, a mounting base 4, a dynamic focus variable lens holder 5, a dynamic focus variable lens 6, an intermediate connecting piece 7, a compensating focusing lens 8, a lens barrel 9, and a rear fixed focusing lens 10. The rear end of the QBH interface 1 is connected to the QBH mounting base 2 through an outer circle positioning guide structure, and a heat sink is arranged on the QBH mounting base 2. The output end of the QBH mounting base 2 is installed with a beam expanding biconcave lens 3. The rear end of the QBH mounting base 2 is connected to the mounting base 4 with bolts, and the internal installation of the mounting base 4 There is a dynamic focus and magnification changer lens base 5, and the dynamic focus and magnification changer lens base 5 is slidably connected to the mounting base 4; a stepping motor 17 with a ball screw is arranged in the middle position of the rear end of the ball screw nut 18, a sealing cover 20 is arranged at the top of the ball screw nut 18, and a motor base 19 is arranged between the sealing cover 20 and the ball screw nut 18. A micro proximity switch 21 is arranged on the mounting base 4, and the position of the dynamic focus and magnification changer lens base 5 is adjusted by controlling the movement of the stepping motor, that is, the position of the dynamic focus and magnification changer 6 is controlled to realize the control of the focal length. A circular hole for installing the micro proximity switch 21 is designed on the mounting base 4 as a reference point for movement reference.

[0021] See also Figure 3-5In this embodiment, a dynamic focus variable lens 6 is provided at the light inlet end of the dynamic focus variable lens holder 5, an intermediate connecting piece 7 is connected to the rear end of the mounting base 4, a compensating focusing lens 8 is provided at the light inlet end of the intermediate connecting piece 7, a lens barrel 9 is threadedly connected to the rear end of the intermediate connecting piece 7, a spacer ring 11 is provided at the rear end of the lens barrel 9, a rear fixed focusing lens 10 is provided between the lens barrel 9 and the spacer ring 11; a pressing ring 13 is connected to the rear end of the lens barrel 9, an output window lens 12 is provided between the spacer ring 11 and the pressing ring 13, a dust cover 14 is provided on the outer side of the pressing ring 13, and a dust cover 14 is provided between the mounting base 4 and the dynamic focus variable lens holder 5. The cross roller guide 15 is arranged, and a ball screw nut 18 is arranged at the top of the dynamic focus zoom lens holder 5, and a nut connector 16 is threadedly connected between the dynamic focus zoom lens holder 5 and the ball screw nut 18; a zoom camera 42x super telephoto optical lens 22 is arranged on one side of the mounting base 4, and a laser ranging sensor 24 is arranged on the other side of the mounting base 4, and a control board 23 is arranged between the zoom camera 42x super telephoto optical lens 22 and the laser ranging sensor 24, and an electric pan / tilt 25 is arranged at the bottom of the control board 23; the beam expanding biconcave lens 3 is made of Corning 7980, diameter 15mm, R1 = 20.02mm, R2 = 18.19mm, anti-reflection film layer 1070nm ± 10nm, dynamic focus zoom lens 6 is made of Corning 7980, diameter 40mm, R1 = 60mm, R2 = 45.83mm, anti-reflection film layer 1070nm ± 10nm; compensation focusing lens 8 is made of Corning 7980, diameter 65mm, R1 = 224.30mm, R2 = 89.98mm, anti-reflection film layer 1070nm ± 10nm, rear fixed focusing lens 10 is made of Corning 7980, diameter 70mm, R1 = 1111.13mm, R2 = 185.13mm, anti-reflection film layer 1070nm ± 10nm, output window lens 12 is made of Corning 7980, diameter 70mm, thickness 4mm, anti-reflection film layer 1070nm±10n, by adjusting the dynamic focus zoom lens 6 to achieve dynamic automatic focusing at different positions within 500 meters, when converging at close distances, the converged light spot will diverge quickly, greatly reducing the power density, thereby avoiding accidental injury due to excessive energy density.

[0022] When working, by moving the stepper motor to drive the dynamic focus zoom lens 6 to the reference point L0, the best focus state of 15mm diameter focus spot is achieved at the 500m position. The positioning of the reference point LO can be ensured by the micro proximity switch 21 each time. As shown in the table, when the dynamic focus zoom lens 6 moves 0.05mm from the reference point L0 to the L1 direction, the best focus state of 11mm diameter focus spot is achieved at 400mm. When the dynamic focus zoom lens 6 moves 5.79mm from L0 to L1, the best focus state of 0.38mm diameter focus spot is achieved at the position of 10mm from the light outlet. Especially when converging at a close distance, the converged light spot will diverge quickly, greatly reducing the power density, thereby avoiding accidental injury due to excessive energy density; the zoom data achieved by adjusting the position of the dynamic focus zoom lens 6 is as shown in the following table:

[0023]

[0024] Through the above steps, for the removal of static obstacles, the position of the obstacle to be removed can be determined in the image through target detection, and the obstacle to be removed can be located on the optical axis of the laser by controlling the angle of the pan-tilt head 25. The distance to the obstacle can be measured by the laser ranging sensor, and then the stepping motor can be used to drive the dynamic focus variable lens to control the focus to remove the obstacle. For the removal of dynamic obstacles, the target can also be detected - the position in the image can be determined relative to the angle of the camera - the pan-tilt head 25 can be controlled to place the target in the middle of the image and close to it, and the distance can be measured in real time - dynamic removal can be initiated when the target reaches the clearable range.

[0025] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A dynamic focusing obstacle removal laser head, comprising a QBH interface (1); characterized in that: The invention also comprises a QBH mounting base (2), a beam expanding biconcave lens (3), a mounting base (4), a dynamic focus variable lens base (5), a dynamic focus variable lens (6), an intermediate connecting piece (7), a compensating focusing lens (8), a lens barrel (9), and a rear fixed focusing lens (10); the rear end of the QBH interface (1) is connected to the QBH mounting base (2) via an outer circle positioning guide structure, and a heat sink is arranged on the QBH mounting base (2); the output end of the QBH mounting base (2) is installed with a beam expanding biconcave lens (3); the rear end of the QBH mounting base (2) is bolted to the mounting base (4); the dynamic focus variable lens base (5) is installed inside the mounting base (4), and the dynamic focus variable lens base (5) is slidably connected to the mounting base (4).

2. The dynamic focusing obstacle removal laser head according to claim 1, characterized in that: A dynamic focus variable magnification lens (6) is arranged at the light-inlet end of the dynamic focus variable magnification lens holder (5); an intermediate connecting member (7) is connected to the rear end of the mounting base (4); a compensating focusing lens (8) is arranged at the light-inlet end of the intermediate connecting member (7); a lens barrel (9) is threadedly connected to the rear end of the intermediate connecting member (7); a spacer (11) is arranged at the rear end of the lens barrel (9); and a rear fixed focusing lens (10) is arranged between the lens barrel (9) and the spacer (11).

3. The dynamic focusing obstacle removal laser head according to claim 2, characterized in that: The rear end of the lens barrel (9) is connected to a pressing ring (13), an output window mirror (12) is arranged between the spacer ring (11) and the pressing ring (13), a dust cover (14) is arranged on the outer side of the pressing ring (13), a cross roller guide rail (15) is arranged between the mounting base (4) and the dynamic focus and magnification changer lens seat (5), a ball screw nut (18) is arranged at the top end of the dynamic focus and magnification changer lens seat (5), and a nut connector (16) is threadedly connected between the dynamic focus and magnification changer lens seat (5) and the ball screw nut (18).

4. The dynamic focusing obstacle removal laser head according to claim 3, characterized in that: A stepping motor (17) with a ball screw is arranged at the middle position of the rear end of the ball screw nut (18), a sealing cover (20) is arranged at the top end of the ball screw nut (18), a motor seat (19) is arranged between the sealing cover (20) and the ball screw nut (18), and a micro proximity switch (21) is arranged on the mounting base (4).

5. The dynamic focusing obstacle removal laser head according to claim 1, characterized in that: A 42x super-telephoto optical lens (22) of a zoom camera is arranged on one side of the mounting base (4), a laser distance measuring sensor (24) is arranged on the other side of the mounting base (4), a control panel (23) is arranged between the 42x super-telephoto optical lens (22) of the zoom camera and the laser distance measuring sensor (24), and an electric pan / tilt platform (25) is arranged at the bottom end of the control panel (23).

6. The dynamic focusing obstacle removal laser head according to claim 1, characterized in that: The beam expanding biconcave lens (3) is made of Corning 7980, with a diameter of 15 mm, R1=20.02 mm, R2=18.19 mm, and an anti-reflection film layer of 1070 nm±10 nm. The dynamic focus zoom lens (6) is made of Corning 7980, with a diameter of 40 mm, R1=60 mm, R2=45.83 mm, and an anti-reflection film layer of 1070 nm±10 nm.

7. The dynamic focusing obstacle removal laser head according to claim 2, characterized in that: The compensating focusing mirror (8) is made of Corning 7980, with a diameter of 65 mm, R1=224.30 mm, R2=89.98 mm, and an anti-reflection film layer of 1070 nm±10 nm. The rear fixed focusing mirror (10) is made of Corning 7980, with a diameter of 70 mm, R1=1111.13 mm, R2=185.13 mm, and an anti-reflection film layer of 1070 nm±10 nm. The output window mirror (12) is made of Corning 7980, with a diameter of 70 mm, a thickness of 4 mm, and an anti-reflection film layer of 1070 nm±10 nm.