WO2021208340A1 - 一种具有自动调焦功能的激光清障仪准直镜头 - Google Patents

一种具有自动调焦功能的激光清障仪准直镜头 Download PDF

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WO2021208340A1
WO2021208340A1 PCT/CN2020/114358 CN2020114358W WO2021208340A1 WO 2021208340 A1 WO2021208340 A1 WO 2021208340A1 CN 2020114358 W CN2020114358 W CN 2020114358W WO 2021208340 A1 WO2021208340 A1 WO 2021208340A1
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focusing
lens
laser
distance
focusing lens
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PCT/CN2020/114358
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English (en)
French (fr)
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杨浩明
王淳
文程
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上海西邦电气有限公司
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Priority claimed from CN202020539846.3U external-priority patent/CN211955951U/zh
Priority claimed from CN202010288183.7A external-priority patent/CN111290098A/zh
Application filed by 上海西邦电气有限公司 filed Critical 上海西邦电气有限公司
Publication of WO2021208340A1 publication Critical patent/WO2021208340A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
    • B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
    • B23K26/046—Automatically focusing the laser beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/28—Systems for automatic generation of focusing signals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables

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  • the invention relates to a laser obstacle clearer, in particular to a collimating lens of a laser obstacle clearer with an automatic focusing function.
  • the industry has invented a laser obstacle removal device.
  • the Chinese Patent Publication (Publication No. CN104348110A) discloses an overhead high-voltage line laser obstacle removal device. 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 indicating laser, a cutting laser, an indicating focusing lens, and a cutting focusing lens.
  • the indicating laser is set in the cutting On the parallel side of the laser, the indicating laser is a visible light laser within 10w; the power supply is connected to the power switch to supply power to the booster voltage and the indicating laser respectively, and the output terminal of the booster transformer is connected to the voltage input of the driver after a button
  • the end is powered by the cutting laser; a groove parallel to the central axis is opened on the housing, and the cutting laser focusing lens is fixed on the connecting rod.
  • the connecting rod passes through the groove and extends out of the housing. The grooves are matched and the connecting rod can move in the grooves.
  • the above-mentioned laser barrier cleaner usually uses a launching device to focus the laser beam emitted by the fiber laser to increase the energy density of the laser.
  • the above-mentioned laser obstruction remover usually adopts manual focusing method to focus the laser. After the focus is adjusted once, the focus cannot be adjusted during use. Therefore, in the traditional way, the user cannot obtain the best focus distance based on the actual obstacles.
  • the purpose of the present invention is to provide a collimating lens for a laser clearer with automatic focusing function, which mainly solves the technical problems existing in the manual focusing method of the existing laser clearer. Adjust the distance of the actual obstacle to the best focal length to obtain the best obstacle removal effect.
  • a collimating lens of a laser barrier clearer with automatic focusing function which is characterized in that it comprises a focusing lens chamber, and a focusing lens that is driven by an electric focusing device to move back and forth in the focusing lens chamber is arranged in the focusing lens chamber;
  • the rear end of the focusing lens compartment is connected to the front end of the lens barrel, and the rear end of the lens barrel is equipped with a QBH laser collimation head;
  • Distance measurement module for the distance between obstacles and focusing lens.
  • the collimating lens of the laser clearer with automatic focusing function is characterized in that the focusing lens is a convex lens for focusing the laser beam.
  • the collimating lens of the laser obstacle clearer with automatic focusing function is characterized in that: the distance measuring module is a laser distance measuring module or an ultrasonic distance measuring module.
  • 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 rod and a movable part; the screw rod is connected and driven by the motor, and the screw rod is movably connected The movable part is connected with the focusing lens.
  • the distance measurement module sends the measured distance data between the transmitter and the obstacle to the arithmetic processing unit; the arithmetic processing unit obtains the position of the focusing lens that needs to be adjusted for the best focusing effect according to the mathematical algorithm, and controls the electric focusing according to the calculation result The device moves to achieve the best focusing effect;
  • S The maximum adjustment distance of the focus lens, the maximum adjustment distance depends on the length of the focus lens compartment;
  • M The shortest focusing distance, that is: the distance between the laser focal point 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.
  • the collimating lens of the laser clearer with automatic focusing function of the present invention by controlling the position of the focusing lens in the launching device, in actual use, the user adjusts to the best according to the distance of the actual obstacle Focus to get the best obstacle removal effect.
  • Figure 1 is a schematic diagram of the structure of the present invention.
  • Fig. 2 is a schematic diagram of the structure of the electric focusing device of the present invention.
  • Figure 3 is a schematic diagram of the electrical structure of the present invention.
  • FIG. 1 it is a schematic structural diagram of a collimating lens of a laser obstacle clearer with automatic focusing function of the present invention. As shown in the figure: it is composed of 7 parts: electric focusing device 1, focusing lens 2, focusing lens compartment 3, lens barrel 4, QBH laser collimation head 5, distance measuring module 6, budget processing unit 7 and so on.
  • the focusing lens compartment 3 is provided with a focusing lens 2 driven by the electric focusing device 1 to move back and forth in the focusing lens compartment 3; the rear end of the focusing lens compartment 3 is connected to the front end of the lens barrel 4, The rear end of the barrel 4 is equipped with a QBH laser collimation head 5; the electric focusing device 1 is connected and controlled by an arithmetic processing unit 7, and the arithmetic processing unit 7 is further connected to measure the distance between the obstacle to be removed and the focusing lens 2 Ranging module 6.
  • 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 may be a device capable of measuring distances, such as a laser distance measuring module or an ultrasonic distance measuring module. Models such as: Beixing Laser's TF03 Lidar long-distance sensor.
  • the focusing lens 2 is a convex lens for focusing the laser beam.
  • the electric focusing device 1 is used to adjust the front and rear positions of the focusing lens 2. By adjusting the position of the focusing lens 2 to achieve different laser focusing effects. The closer the focusing lens 2 is to the lens barrel 4, the closer the focal point of the focused laser light is to the transmitter, and vice versa.
  • the structure of the electric focusing device 1 can be composed of a motor 9, a screw 8 and a movable part 10.
  • the screw 8 is connected and driven by the motor 9, and the screw 8 is movably connected to the movable part 10.
  • the movable part 10 is connected to the focusing lens 2.
  • the motor 9 is controlled by the budget processing unit 7 to rotate the screw 8 to drive the movable part 10 connected to the focusing lens 2 to move forward and backward, and then to control the forward and backward movement of the focusing lens 2 to achieve dynamic focusing.
  • the focus lens compartment 3 is the position position of the focus lens 2, and the focus lens 2 can be adjusted left and right in the focus lens compartment 3 under the action of the electric focusing device 1.
  • the lens barrel 4 is a connecting device between the focusing lens 2 and the QBH laser collimation head 5.
  • the QBH laser collimator 5 is a universal connector in the laser industry, which serves as a physical connection between the focusing lens 2 and the fiber laser.
  • the arithmetic processing unit 7 performs the calculation of the moving distance of the focusing lens 2 and the control of the electric focusing device 1 according to the measured distance.
  • the arithmetic processing unit 7 may be a control circuit board having a microcontroller (MCU) with a model of STM32F103.
  • MCU microcontroller
  • the distance measurement module 6 sends the measured distance data between the transmitter and the obstacle to the arithmetic processing unit 7.
  • the arithmetic 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. And according to the calculation result, the action of the electric focusing device 1 is controlled. By achieving the best focusing effect, better cutting and foreign body removal performance can be achieved.
  • S The maximum adjustment distance of the focus lens 2, and the maximum adjustment distance depends on the length of the focus lens compartment 3.
  • M The shortest focusing distance, that is: the distance between the laser focus and the transmitter 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 by a spot analyzer, the distance between the laser and the emitter at the smallest spot in the transmission path is the M value.
  • N The curvature of the focusing lens 2.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Laser Surgery Devices (AREA)

Abstract

一种具有自动调焦功能的激光清障仪准直镜头，包括聚焦镜片仓（3），聚焦镜片仓（3）内设置一由电动调焦装置（1）驱动在聚焦镜片（3）仓内前后移动的聚焦镜片（2）；聚焦镜片仓（3）的后端连接镜筒（4）的前端，镜筒（4）的后端安装QBH激光准直头（5）；电动调焦装置（1）由运算处理单元（7）连接控制，运算处理单元（7）进一步连接用于测量需要清除的障碍物与调焦镜片（2）的距离的测距模块（6）。在实际使用过程中，用户根据实际障碍物的距离，调整到最佳焦距，以获得最佳的障碍物清除效果。

Description

一种具有自动调焦功能的激光清障仪准直镜头 技术领域
本发明涉及激光清障仪，尤其涉及一种具有自动调焦功能的激光清障仪准直镜头。
背景技术
架空的高压以及低压输电线路，在日常生活中随处可见，时常有塑料薄膜、风筝线、气球线缠绕在输电线路上，威胁着供电安全。
目前通常供电的情况下人工清理，工人带电在高空作业，具有较高的危险性，清理时间长而效果并不理想。也有通过可操控的机器人或自动化装置来清障的，但这些装置均具有结构复杂、故障率高、须多人配合协作的问题，在使用前需要先把装置挂在架空的输电线路上，安全隐患依然存在，完成清障需要很长的时间，效率较低。
为解决上述问题，业者发明了激光清障仪，如中国发明专利公开说明书(公开号CN104348110A)公开了一种架空高压线激光清障仪器。它包括电源、升压变压器、电源开关、壳体、切割激光启动按钮，其中，所述壳体内设有驱动器、指示激光器、切割激光器、指示聚焦透镜和切割聚焦透镜，所述指示激光器设在切割激光器的平行侧面，所述指示激光器为10w以内的可见光激光器；所述电源连接电源开关后分别为升压电压器和指示激光器供电，所述升压变压器的输出端经过按钮后连接驱动器的电压输入端为切割激光器供电；所述壳体上开有和中心轴平行的凹槽，所述切割激光聚焦透镜固定在连杆上，所述连杆穿过凹槽伸出壳体外部，连杆与凹槽配合且连杆可在凹槽内移 动。使用时，发现架空输电线路上有异物时，用钥匙接通电源开关，并使指示激光束对准切割位置，按下按钮，切割激光器发射激光束，经切割聚焦透镜，在异物处汇聚，再根据异物宽度摆动，将异物切割，切割后的异物在重力作用下落到地面，关闭电源开关切断电源，完成清障任务。
上述激光清障仪为了使得激光在切割远距离异物时有良好的切割效果，通常利用发射装置对光纤激光器发出的激光束进行聚焦，提高激光的能量密度。
上述的激光清障仪对激光的聚焦通常采用手动调焦的方式对激光进行聚焦，在一次调焦完之后，使用过程中无法调焦。因此，在传统方式下，用户无法根据实际障碍物的远近情况获得最佳的焦距。
发明内容
本发明的目的在于提供一种具有自动调焦功能的激光清障仪准直镜头，主要解决上述现有激光清障仪的手动调焦方式所存在的技术问题，在实际使用过程中，用户根据实际障碍物的距离，调整到最佳焦距，以获得最佳的障碍物清除效果。
为了实现上述目的，本发明采用了如下技术方案：
一种具有自动调焦功能的激光清障仪准直镜头，其特征在于：它包括聚焦镜片仓，该聚焦镜片仓内设置一由电动调焦装置驱动在聚焦镜片仓内前后移动的聚焦镜片；该聚焦镜片仓的后端连接镜筒的前端，该镜筒的后端安装QBH激光准直头；该电动调焦装置由运算处理单元连接控制，该运算处理单元进一步连接用于测量需要清除的障碍物与 调焦镜片的距离的测距模块。
所述的具有自动调焦功能的激光清障仪准直镜头，其特征在于：该聚焦镜片是用于对激光束进行聚焦的凸透镜。
所述的具有自动调焦功能的激光清障仪准直镜头，其特征在于：该测距模块是激光测距模块或超声波测距模块。
所述的具有自动调焦功能的激光清障仪准直镜头，其特征在于：该电动调焦装置由电机、丝杆和活动件构成；该丝杆由电机连接驱动，该丝杆上活动连接活动件，该活动件连接调焦镜片。
所述的具有自动调焦功能的激光清障仪准直镜头，其特征在于：其自动调焦功能的工作流程是：
测距模块将测量到的发射器与障碍物之间的距离数据发送给运算处理单元；运算处理单元按照数学算法得出最佳聚焦效果需要调节的聚焦镜片位置，并依据计算结果控制电动调焦装置动作，通过取得最佳的聚焦效果；
该调焦距离计算公式
L＝(D÷M)*L*N。
D：障碍物与发射器之间的距离，即测距模块测量的需要清除的障碍物与调焦镜片的距离；
S：聚焦镜片的最大调节距离，其最大调节距离取决于聚焦镜片仓的长度；
L：聚焦镜片的最佳位置；
M：最短聚焦距离，即：聚焦镜片在最靠近镜筒位置时，激光焦 点与发射器的距离；M由实际测量得出；
N：聚焦镜片的曲率。
藉由上述技术方案，本发明具有自动调焦功能的激光清障仪准直镜头，通过控制发射装置内聚焦镜片的位置，在实际使用过程中，用户根据实际障碍物的距离，调整到最佳焦距，以获得最佳的障碍物清除效果。
附图说明
图1为本发明的结构示意图。
图2为本发明中电动调焦装置的结构示意图。
图3为本发明中的电气结构原理图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。
如图1所示，它是本发明一种具有自动调焦功能的激光清障仪准直镜头的结构示意图。如图所示：它由电动调焦装置1、聚焦镜片2、聚焦镜片仓3、镜筒4、QBH激光准直头5、测距模块6、预算处理单元7等7个部分组成。具体的构造是：该聚焦镜片仓3内设置一由电动调焦装置1驱动在聚焦镜片仓3内前后移动的聚焦镜片2；该聚焦镜片仓3的后端连接镜筒4的前端，该镜筒4的后端安装QBH激光准直头5；该电动调焦装置1由运算处理单元7连接控制，该运算处理单元7进一步连接用于测量需要清除的障碍物与调焦镜片2的距离的 测距模块6。
测距模块6，用于测量需要清除的障碍物与调焦镜片2的距离。测距模块6可以是激光测距模块、超声波测距模块等可以测量距离的装置。型号如：北醒激光的TF03激光雷达长距离传感器。
聚焦镜片2为一块凸透镜，用于对激光束进行聚焦。
电动调焦装置1用于调节聚焦镜片2的前后位置。通过调节聚焦镜片2的位置以实现不同的激光聚焦效果。聚焦镜片2距离镜筒4越近，聚焦后激光的焦点距离发射器越近，反之则越远。
如图2所示，该电动调焦装置1的结构可以是由电机9、丝杆8和活动件10构成；该丝杆8由电机9连接驱动，该丝杆8上活动连接活动件10，该活动件10连接调焦镜片2。使用时，电机9由预算处理单元7控制丝杆8转动，进而带动连接调焦镜片2的活动件10进行前后移动，进而控制调焦镜片2的前后运动，以实现动态调焦。
聚焦镜片仓3是聚焦镜片2的位置仓位，聚焦镜片2可在电动调焦装置1的作用在聚焦镜片仓3内左右调节位置。
镜筒4为聚焦镜片2与QBH激光准直头5之间的连接装置。
QBH激光准直头5为一种激光行业通用型的接头，起到调焦镜片2与光纤激光器物理连接的作用。
运算处理单元7根据测量的距离进行聚焦镜片2移动距离计算及电动调焦装置1的控制。运算处理单元7可以是具有型号为STM32F103的微控制器(MCU)的控制电路板。
本发明具有自动调焦功能的激光清障仪准直镜头的工作流程如 下：
测距模块6将测量到的发射器与障碍物之间的距离数据发送给运算处理单元7。运算处理单元7按照数学算法得出最佳聚焦效果需要调节的聚焦镜片2位置。并依据计算结果控制电动调焦装置1动作。通过取得最佳的聚焦效果，从而达到更加良好的切割、异物清除性能。
该调焦距离计算公式
(1)几个重要的参数：
D：障碍物与发射器之间的距离，即测距模块6测量的需要清除的障碍物与调焦镜片2的距离。
S：聚焦镜片2的最大调节距离，其最大调节距离取决于聚焦镜片仓3的长度。
L：聚焦镜片2的最佳位置。
M：最短聚焦距离，即：聚焦镜片2在最靠近镜筒4位置时，激光焦点与发射器的距离。M由实际测量得出；测量方式是：通过光斑分析仪测量聚焦镜片2在最靠近镜筒4位置时，激光在传输路径下最小光斑处距离发射器的距离值即为M值。
N：聚焦镜片2的曲率。
(2)计算公式
L＝(D÷M)*L*N。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都 应涵盖在本发明的保护范围之内。

Claims (5)

  1. 一种具有自动调焦功能的激光清障仪准直镜头，其特征在于：它包括聚焦镜片仓(3)，该聚焦镜片仓(3)内设置一由电动调焦装置(1)驱动在聚焦镜片仓(3)内前后移动的聚焦镜片(2)；该聚焦镜片仓(3)的后端连接镜筒(4)的前端，该镜筒(4)的后端安装QBH激光准直头(5)；该电动调焦装置(1)由运算处理单元(7)连接控制，该运算处理单元(7)进一步连接用于测量需要清除的障碍物与调焦镜片(2)的距离的测距模块(6)。
  2. 根据权利要求1所述的具有自动调焦功能的激光清障仪准直镜头，其特征在于：该聚焦镜片(2)是用于对激光束进行聚焦的凸透镜。
  3. 根据权利要求1所述的具有自动调焦功能的激光清障仪准直镜头，其特征在于：该测距模块(6)是激光测距模块或超声波测距模块。
  4. 根据权利要求1所述的具有自动调焦功能的激光清障仪准直镜头，其特征在于：该电动调焦装置(1)由电机(9)、丝杆(8)和活动件(10)构成；该丝杆(8)由电机(9)连接驱动，该丝杆(8)上活动连接活动件(10)，该活动件(10)连接调焦镜片(2)。
  5. 根据权利要求1或2或3或4所述的具有自动调焦功能的激光清障仪准直镜头，其特征在于：其自动调焦功能的工作流程是：
    测距模块(6)将测量到的发射器与障碍物之间的距离数据发送给运算处理单元(7)；运算处理单元(7)按照数学算法得出最佳聚 焦效果需要调节的聚焦镜片(2)位置，并依据计算结果控制电动调焦装置(1)动作，通过取得最佳的聚焦效果；
    该调焦距离计算公式
    L＝(D÷M)*L*N。
    D：障碍物与发射器之间的距离，即测距模块(6)测量的需要清除的障碍物与调焦镜片(2)的距离；
    S：聚焦镜片(2)的最大调节距离，其最大调节距离取决于聚焦镜片仓(3)的长度；
    L：聚焦镜片(2)的最佳位置；
    M：最短聚焦距离，即：聚焦镜片(2)在最靠近镜筒(4)位置时，激光焦点与发射器的距离；M由实际测量得出；
    N：聚焦镜片(2)的曲率。
PCT/CN2020/114358 2020-04-14 2020-09-10 一种具有自动调焦功能的激光清障仪准直镜头 WO2021208340A1 (zh)

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