A collimating lens for laser obstacle remover with automatic focusing function

Abstract

The present invention relates to a collimating lens of a laser obstacle remover with an automatic focusing function. It comprises a focusing lens chamber, in which a focusing lens driven by an electric focusing device to move forward and backward in the focusing lens chamber is arranged; the rear end of the focusing lens chamber is connected to the front end of a lens barrel, and a QBH laser collimating head is installed at the rear end of the lens barrel; the electric focusing device is connected and controlled by an operation processing unit, and the operation processing unit is further connected to a distance measuring module for measuring the distance between an obstacle to be removed and the focusing lens. In actual use, the user adjusts to the optimal focal length according to the actual distance of the obstacle to obtain the best obstacle removal effect.

Description

Technical Field

[0001] The invention relates to a laser obstacle remover, and in particular to a collimating lens of a laser obstacle remover with an automatic focusing function. Background Art

[0002] Overhead high-voltage and low-voltage transmission lines can be seen everywhere in daily life. Plastic films, kite strings, and balloon strings are often entangled in the transmission lines, threatening power supply safety.

[0003] At present, manual cleaning is usually carried out under power supply, and workers work at high altitudes with power on, which is highly dangerous, takes a long time to clean, and the effect is not ideal. There are also controllable robots or automated devices for clearing obstacles, but these devices have complex structures, high failure rates, and require the cooperation of multiple people. Before use, the device needs to be hung on the overhead transmission line, and safety hazards still exist. It takes a long time to complete the clearance, and the efficiency is low.

[0004] To solve the above problems, the industry has invented a laser obstacle removal instrument. For example, the Chinese invention patent disclosure specification (publication number CN104348110A) discloses an overhead high-voltage line laser obstacle removal instrument. It includes a power supply, a step-up transformer, a power switch, a housing, and a cutting laser start button. The housing is provided with a driver, an indicator laser, a cutting laser, an indicator focusing lens, and a cutting focusing lens. The indicator laser is arranged on the parallel side of the cutting laser. The indicator laser is a visible light laser within 10w. After the power supply is connected to the power switch, it supplies power to the step-up voltage device and the indicator laser respectively. After the output end of the step-up transformer passes through the button, it is connected to the voltage input end of the driver to supply power to the cutting laser. The housing is provided with a groove parallel to the central axis. The cutting laser focusing lens is fixed on a connecting rod. The connecting rod passes through the groove and extends out of the housing. The connecting rod cooperates with the groove and the connecting rod can move in the groove. During use, if foreign objects are found on the overhead transmission line, turn on the power switch with the key, align the indicating laser beam with the cutting position, press the button, the cutting laser emits the laser beam, which passes through the cutting focusing lens and converges at the foreign object. It then swings according to the width of the foreign object to cut the foreign object. The cut foreign object falls to the ground under the action of gravity. Turn off the power switch to cut off the power supply to complete the obstacle removal task.

[0005] In order to achieve a good cutting effect when cutting foreign objects at a long distance, the above-mentioned laser obstacle remover usually uses a transmitting device to focus the laser beam emitted by the fiber laser to increase the energy density of the laser.

[0006] The laser obstacle remover mentioned above usually focuses the laser by manual focusing, and after focusing once, the focus cannot be adjusted during use. Therefore, in the traditional way, the user cannot obtain the best focal length according to the actual distance of the obstacle. Summary of the invention

[0007] The purpose of the present invention is to provide a laser obstacle remover collimating lens with automatic focusing function, which mainly solves the technical problems existing in the manual focusing method of the above-mentioned existing laser obstacle removers. In actual use, the user adjusts to the optimal focal length according to the actual distance of the obstacle to obtain the best obstacle removal effect.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A collimating lens for a laser obstacle clearer with an automatic focusing function, characterized in that: it comprises a focusing lens chamber, in which a focusing lens is arranged, which is driven by an electric focusing device to move back and forth in the focusing lens chamber; the rear end of the focusing lens chamber is connected to the front end of a lens barrel, and a QBH laser collimating head is installed at the rear end of the lens barrel; the electric focusing device is connected and controlled by a calculation processing unit, and the calculation processing unit is further connected to a distance measuring module for measuring the distance between an obstacle to be cleared and the focusing lens.

[0010] The collimating lens of the laser obstacle remover with automatic focusing function is characterized in that the focusing lens is a convex lens for focusing the laser beam.

[0011] The collimating lens of the laser obstacle remover with automatic focusing function is characterized in that the distance measuring module is a laser distance measuring module or an ultrasonic distance measuring module.

[0012] The collimating lens of the laser obstacle clearer with automatic focusing function is characterized in that: the electric focusing device is composed of a motor, a screw and a movable part; the screw is connected and driven by the motor, the screw is movably connected to the movable part, and the movable part is connected to the focusing lens.

[0013] The collimating lens of the laser obstacle remover with automatic focusing function is characterized in that the working process of the automatic focusing function is:

[0014] The distance measurement module sends the measured distance data between the transmitter and the obstacle to the calculation processing unit; the calculation processing unit obtains the focus lens position that needs to be adjusted for the best focusing effect according to the mathematical algorithm, and controls the action of the electric focusing device according to the calculation result to obtain the best focusing effect;

[0015] The focusing distance calculation formula

[0016] L=(D÷M)*L*N.

[0017] D: The distance between the obstacle and the transmitter, that is, the distance between the obstacle to be cleared and the focusing lens measured by the ranging module;

[0018] S: The maximum adjustment distance of the focusing lens, which depends on the length of the focusing lens chamber;

[0019] L: The best position of the focusing lens;

[0020] M: shortest focusing distance, that is, the distance between the laser focus and the transmitter when the focusing lens is closest to the lens barrel; M is obtained by actual measurement;

[0021] N: The curvature of the focusing lens.

[0022] By means of the above technical solution, the collimating lens of the laser obstacle clearer with automatic focusing function of the present invention controls the position of the focusing lens in the transmitting device. During actual use, the user can adjust to the optimal focal length according to the actual distance of the obstacle to obtain the best obstacle removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 It is a schematic diagram of the structure of the electric focusing device in the present invention.

[0025] Figure 3 This is a schematic diagram of the electrical structure of the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] like Figure 1 As shown, it is a structural schematic diagram of a collimating lens of a laser obstacle remover with an automatic focusing function of the present invention. As shown in the figure: it is composed of 7 parts, including an electric focusing device 1, a focusing lens 2, a focusing lens chamber 3, a lens barrel 4, a QBH laser collimating head 5, a distance measuring module 6, and a budget processing unit 7. The specific structure is: a focusing lens 2 driven by the electric focusing device 1 to move back and forth in the focusing lens chamber 3 is arranged in the focusing lens chamber 3; the rear end of the focusing lens chamber 3 is connected to the front end of the lens barrel 4, and the rear end of the lens barrel 4 is installed with a QBH laser collimating head 5; the electric focusing device 1 is connected and controlled by the calculation processing unit 7, and the calculation processing unit 7 is further connected to the distance measuring module 6 for measuring the distance between the obstacle to be cleared and the focusing lens 2.

[0028] The distance measuring module 6 is used to measure the distance between the obstacle to be cleared and the focusing lens 2. The distance measuring module 6 can be a device that can measure distance, such as a laser distance measuring module, an ultrasonic distance measuring module, etc. The model is, for example, the TF03 laser radar long-distance sensor of Benewake Laser.

[0029] The focusing lens 2 is a convex lens used to focus the laser beam.

[0030] The electric focusing device 1 is used to adjust the front and rear positions of the focusing lens 2. Different laser focusing effects can be achieved by adjusting the position of the focusing lens 2. The closer the focusing lens 2 is to the lens barrel 4, the closer the focus of the laser is to the emitter after focusing, and vice versa.

[0031] like Figure 2 As shown, the structure of the electric focusing device 1 can be composed of a motor 9, a lead screw 8 and a movable part 10; the lead screw 8 is connected and driven by the motor 9, and the movable part 10 is movably connected to the lead screw 8, and the movable part 10 is connected to the focusing lens 2. When in use, the motor 9 is controlled by the budget processing unit 7 to rotate the lead screw 8, thereby driving the movable part 10 connected to the focusing lens 2 to move forward and backward, thereby controlling the forward and backward movement of the focusing lens 2 to achieve dynamic focusing.

[0032] The focusing lens chamber 3 is a position chamber for the focusing lens 2 , and the focusing lens 2 can be adjusted left and right in the focusing lens chamber 3 under the action of the electric focusing device 1 .

[0033] The lens barrel 4 is a connecting device between the focusing lens 2 and the QBH laser collimation head 5 .

[0034] The QBH laser collimator 5 is a universal connector in the laser industry, which serves to physically connect the focusing lens 2 with the fiber laser.

[0035] The calculation processing unit 7 calculates the moving distance of the focusing lens 2 and controls the electric focusing device 1 according to the measured distance. The calculation processing unit 7 may be a control circuit board having a microcontroller (MCU) of the model STM32F103.

[0036] The working process of the collimating lens of the laser obstacle remover with automatic focusing function of the present invention is as follows:

[0037] The distance measuring module 6 sends the measured distance data between the transmitter and the obstacle to the calculation processing unit 7. The calculation processing unit 7 obtains the position of the focusing lens 2 that needs to be adjusted for the best focusing effect according to the mathematical algorithm. The electric focusing device 1 is controlled to operate according to the calculation result. By obtaining the best focusing effect, better cutting and foreign matter removal performance can be achieved.

[0038] The focusing distance calculation formula

[0039] (1) Several important parameters:

[0040] D: the distance between the obstacle and the transmitter, that is, the distance between the obstacle to be cleared and the focusing lens 2 measured by the distance measuring module 6 .

[0041] S: The maximum adjustment distance of the focusing lens 2, which depends on the length of the focusing lens chamber 3.

[0042] L: The best position of focusing lens 2.

[0043] M: shortest focusing distance, i.e., the distance between the laser focus and the emitter when the focusing lens 2 is closest to the lens barrel 4. M is obtained by actual measurement; the measurement method is: when the focusing lens 2 is closest to the lens barrel 4, the distance between the laser and the emitter at the minimum spot in the transmission path is measured by a spot analyzer, which is the M value.

[0044] N: curvature of focusing lens 2.

[0045] (2) Calculation formula

[0046] L=(D÷M)*L*N.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A collimating lens for a laser obstacle remover with an automatic focusing function, characterized in that: It comprises a focusing lens chamber (3), in which a focusing lens (2) is arranged, which is driven by an electric focusing device (1) to move forward and backward in the focusing lens chamber (3); the rear end of the focusing lens chamber (3) is connected to the front end of a lens barrel (4), and a QBH laser collimator (5) is installed at the rear end of the lens barrel (4); the electric focusing device (1) is connected and controlled by an operation processing unit (7), and the operation processing unit (7) is further connected to a distance measurement module (6) for measuring the distance between an obstacle to be cleared and the focusing lens (2); the focusing lens (2) is a convex lens for focusing a laser beam; The distance measuring module (6) is a laser distance measuring module or an ultrasonic distance measuring module; The electric focusing device (1) is composed of a motor (9), a screw rod (8) and a movable part (10); the screw rod (8) is connected and driven by the motor (9), the screw rod (8) is movably connected to the movable part (10), and the movable part (10) is connected to the focusing lens (2); The workflow of its autofocus function is: The distance measurement module sends the measured distance data between the transmitter and the obstacle to the calculation processing unit; the calculation processing unit obtains the focus lens position that needs to be adjusted for the best focusing effect according to the mathematical algorithm, and controls the action of the electric focusing device according to the calculation result to obtain the best focusing effect; Among them, the focusing distance calculation formula is: L=(D÷M)*S*N in: D: The distance between the obstacle and the transmitter, that is, the distance between the obstacle to be cleared and the focusing lens measured by the ranging module; S: The maximum adjustment distance of the focusing lens, which depends on the length of the focusing lens chamber; L: The best position of the focusing lens; M: shortest focusing distance, that is, the distance between the laser focus and the transmitter when the focusing lens is closest to the lens barrel; M is obtained by actual measurement; N: The curvature of the focusing lens.

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