Laser assembly for laser weeding

Abstract

The embodiment of the utility model discloses a laser assembly for laser weeding, relates to the technical field of agricultural weeding equipment, and aims to cool a laser and improve the output efficiency of the laser assembly. The laser assembly comprises at least one group of laser modules, and each group of laser modules comprises a shell, a laser and a galvanometer; the laser is arranged in the shell, and the galvanometer is arranged on a line corresponding to the orientation of a laser emitting tube of the laser; each laser module further comprises a cooling pipe, and the cooling pipes are arranged on the laser emitting pipes of the lasers in the same group in a surrounding mode. The laser assembly further comprises a cooling-water machine, and the cooling-water machine is connected with the water inlet and the water outlet of the cooling pipe in each laser module. The weeding device is suitable for mechanical weeding operation.

Description

Technical Field

[0001] This application relates to the field of agricultural weeding equipment technology, and more particularly to a laser component for laser weeding. Background Technology

[0002] Laser weeding is a precise, non-contact mechanical weeding method that is highly efficient and pollution-free. However, the laser component in laser weeding is a device that integrates a laser and optical elements. Traditional laser components tend to generate a lot of heat when operating at high power, which can cause the laser temperature to rise and affect the laser output efficiency. Utility Model Content

[0003] In view of this, embodiments of this application provide a laser component for laser weeding, which can cool the laser and facilitate improving the output efficiency of the laser component.

[0004] In a first aspect, embodiments of this application provide a laser assembly for laser weeding, comprising: at least one set of laser modules, each set of laser modules including a housing, a laser, and a galvanometer; the laser is disposed within the housing, and the galvanometer is disposed on a line corresponding to the orientation of the laser emission tube of the laser; each set of laser modules further includes a cooling pipe, the cooling pipe surrounding the laser emission tube of the laser in the same set; the laser assembly further includes a chiller, the chiller being connected to the inlet and outlet of the cooling pipe in each set of laser modules respectively.

[0005] Optionally, the housing of each laser module includes an end plate, on which a light guide tube is provided; wherein, the end plate is one end facing the laser emission tube of the laser in the same group; the galvanometer of each laser module is located at one end of the light guide tube in the same group.

[0006] Optionally, each laser module may also include a field mirror; the field mirror is disposed on the line corresponding to the light output port of the galvanometer in the same group.

[0007] Optionally, each laser module group also includes a protective mirror; the protective mirror surrounds the field mirrors in the same group.

[0008] Optionally, each laser module may also include a beam expander; the beam expander is disposed on the laser output tube of the laser in the same group.

[0009] Optionally, a fixing plate is also included; the housing of each laser module is disposed on the fixing plate; the fixing plate is provided with light guide holes; the number of light guide holes is equal to the number of laser modules; the light outlet of the galvanometer of each laser module is set one-to-one with each light guide hole on the fixing plate.

[0010] Optionally, it also includes a camera unit; the fixing plate is also provided with a light-transmitting hole; the camera module in the camera unit faces the light-transmitting hole.

[0011] Optionally, it also includes a first fill light and a second fill light; the first fill light and the second fill light are disposed on the fixed plate and located on both sides of the camera unit.

[0012] Optionally, a cleaning device may also be included; the cleaning device is mounted on the fixed plate.

[0013] Optionally, a control card is also included; the control card is connected to the laser, chiller and galvanometer in each laser module respectively.

[0014] The laser assembly for laser weeding provided in the embodiments of this application includes: at least one set of laser modules, each set of laser modules including a housing, a laser, and a galvanometer; the laser is disposed within the housing, and the galvanometer is disposed on a line corresponding to the orientation of the laser emission tube of the laser; each set of laser modules also includes a cooling pipe, the cooling pipe surrounding the laser emission tube of the laser in the same set; the laser assembly also includes a chiller, the chiller being connected to the inlet and outlet of the cooling pipe in each set of laser modules respectively. The chiller's connection to the inlet and outlet of the cooling pipe in each set of laser modules effectively reduces the laser temperature, improves laser output efficiency and stability, thereby increasing the output efficiency of the laser assembly for laser weeding. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a laser module in a laser assembly according to an embodiment of this application;

[0017] Figure 2 This is an exploded view of a laser module in a laser assembly according to an embodiment of this application;

[0018] Figure 3 This is a schematic diagram of a chiller in a laser assembly according to an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of a control card in a laser assembly according to an embodiment of this application;

[0020] Figure 5This is a schematic diagram illustrating the acquisition of crop image data in a target area according to an embodiment of this application; Detailed Implementation

[0021] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0022] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0023] To enable those skilled in the art to better understand the technical concept, implementation scheme and beneficial effects of the embodiments of this application, detailed descriptions are provided below through specific embodiments.

[0024] One embodiment of this application provides a laser assembly for laser weeding that can cool the laser, thereby improving the output efficiency of the laser assembly.

[0025] Figure 1 This is a schematic diagram of the structure of a laser module in a laser assembly according to an embodiment of this application. Figure 2 This is an exploded view of the laser module in a laser assembly according to an embodiment of this application. Figure 3 This is a schematic diagram of a chiller in a laser assembly according to an embodiment of this application, as shown below. Figure 1 , Figure 2 , Figure 3 As shown, the laser assembly for laser weeding in this embodiment includes: at least one set of laser modules 1, each set of laser modules including a housing 10, a laser 11 and a galvanometer 12; the laser 11 is disposed inside the housing 10, and the galvanometer 12 is disposed on the line corresponding to the direction of the laser emission tube 11a of the laser 11; each set of laser modules 1 also includes a cooling pipe 13, the cooling pipe 13 surrounding the laser emission tube 11a of the laser 11 in the same set; the laser assembly also includes a chiller 2, the chiller 2 being connected to the inlet and outlet of the cooling pipe 13 in each set of laser modules 1 respectively.

[0026] like Figure 1 , Figure 2 and Figure 3As shown, in one embodiment of this application, the laser module 1 includes a housing 10, a laser 11, a galvanometer 12, and a cooling pipe 13. The laser module 1 can consist of one, two, three, or more units, and can be adjusted according to actual needs. The housing 10 can be made of aluminum alloy, which is lightweight, high-strength, and has good heat dissipation performance. The laser 11 can be a glass tube laser, a radio frequency laser, a semiconductor fiber laser, or any other type of laser. The laser 11 is housed within the housing 10. The galvanometer 12 is positioned on the path corresponding to the orientation of the laser emission tube 11a of the laser 11. The cooling pipe 13 surrounds the laser emission tube 11a. The galvanometer 12 is a two-dimensional galvanometer, capable of reflecting and deflecting the laser beam, and precisely adjusting the laser beam in the horizontal and vertical directions. The cooling pipe 13 has a ring structure, tightly fitting the laser emission tube 11a to improve cooling efficiency. The orientation of the laser emission tube 11a corresponds to the path the laser travels after the laser 11 emits the laser during operation. The laser assembly of this application also includes a chiller 2, which is connected to the inlet and outlet of the cooling pipe 13 in each laser module. The chiller 2 has temperature control and flow control functions, and can control the temperature to be constant within a certain range according to the working status of the laser system. It also alarms when there is an abnormality, ensuring that the entire system can work within a suitable temperature range during weeding operations.

[0027] The laser assembly for laser weeding provided in the embodiments of this application includes: at least one set of laser modules, each set of laser modules including a housing, a laser, and a galvanometer; the laser is disposed within the housing, and the galvanometer is disposed on a line corresponding to the orientation of the laser emission tube of the laser; each set of laser modules also includes a cooling pipe, the cooling pipe surrounding the laser emission tube of the laser in the same set; the laser assembly also includes a chiller, the chiller being connected to the inlet and outlet of the cooling pipe in each set of laser modules respectively. The chiller's connection to the inlet and outlet of the cooling pipe in each set of laser modules effectively reduces the laser temperature, improves laser output efficiency and stability, thereby increasing the output efficiency of the laser assembly for laser weeding.

[0028] See Figure 1 and Figure 2 In one embodiment of this application, the housing 10 of each laser module of the laser assembly includes an end plate 10a, on which a light guide tube 14 is provided; wherein, the end plate 10a is one end facing the laser emission tube 11a of the laser 11 in the same group; the galvanometer 12 of each laser module is disposed at one end of the light guide tube 14 in the same group.

[0029] In one embodiment of this application, each of the at least one set of laser modules includes a housing 10, a laser 11, a galvanometer 12, and a light guide tube 14. After the laser 11 emits laser light, it passes through the laser emission tube 11a and the light guide tube 14 of the end plate 10a, and is reflected and deflected from the galvanometer 12 of each set of laser modules.

[0030] Optionally, each laser module also includes a field mirror 15; the field mirror 15 is disposed on the line corresponding to the light output port of the galvanometer 12 in the same group.

[0031] In one embodiment of this application, the laser module 1 is further provided with a field lens 15. The field lens 15 is set at the light outlet of the galvanometer 12 of the same group of laser modules. The field lens 15 is a plano-convex lens or an aspherical lens, which has high light transmittance and good focusing performance. When the laser is reflected and deflected by the galvanometer 12, the field lens 15 focuses the deflected laser beam to achieve the effect of energy focusing.

[0032] Optionally, each laser module group also includes a protective mirror 16; the protective mirror 16 is disposed on the field mirror 15 in the same group.

[0033] To prevent external dust, rainwater, flying insects and other contaminants from getting on the field lens 15 and causing damage, a protective lens 16 is installed on the field lens 15 in the laser module 1. The protective lens 16 is made of a material with high light transmittance to reduce the energy loss of the laser beam, and is resistant to high temperature to withstand the high temperature of the laser beam. It has an anti-reflective coating to reduce the reflection of the laser beam and improve optical efficiency, and has high hardness to prevent scratches and mechanical damage.

[0034] like Figure 2 As shown, optionally, each group of laser modules in the laser assembly in one embodiment of this application further includes a beam expander 17; the beam expander 17 is disposed on the laser emission tube 11a of the laser 11 in the same group.

[0035] In laser module 1, a beam expander 17 can be installed on the laser output tube 11a of laser 11 according to actual needs. The beam expander 17 increases the diameter of the laser beam and reduces beam divergence. In some cases, other laser shaping devices can also be installed in laser module 1.

[0036] See Figure 2 Optionally, in one embodiment of this application, the laser assembly further includes a fixing plate 3; the housing 10 of each group of laser modules is disposed on the fixing plate 3; the fixing plate 3 is provided with light guide holes 31; the number of light guide holes 31 is equal to the number of groups of laser modules 1; the light outlet of the galvanometer 12 of each group of laser modules is correspondingly set with each light guide hole on the fixing plate 3.

[0037] In one embodiment of this application, the housing 10 and galvanometer 12 of the laser module 1 are both mounted on the fixing plate 3. The fixing plate 3 includes light guide holes 31, which correspond one-to-one with the light outlets of the galvanometers 12 of each laser module, ensuring that the laser beams of multiple laser modules are output in a coordinated manner. The number of light guide holes 31 is equal to the number of laser modules 1. By fixing multiple laser modules 1 on the fixing plate 3, the structure of the laser module is simplified and the manufacturing cost is reduced. By integrating all functional modules on one fixing plate, the integrated structure reduces the size and floor space of the device, making it suitable for applications with limited space.

[0038] like Figure 1 and Figure 2 As shown, optionally, in one embodiment of this application, the laser component further includes a camera unit 4; the fixing plate 3 is also provided with a light-transmitting hole 32; the camera module in the camera unit 4 faces the light-transmitting hole 32.

[0039] A camera unit 4 is also installed on the mounting plate 3. The camera unit 4 can be a binocular camera, a monocular camera, or other types of cameras, or it can be a visible light camera, a camera of other wavelengths, radar, or a combination of the above. When the laser component of this application is fixed on the mobile carrier for weeding operations, the camera module of the camera unit 4 acquires images of the ground crops in the target area through the light-transmitting hole 32, obtains the original image data of the ground crops in the target area, performs image processing on the original image data to obtain the location of the weeds, and sends the weed location to the control system of the mobile carrier. Based on the location information, the laser 11 emits a laser to eliminate the target weeds.

[0040] See Figure 2 Optionally, it also includes a first fill light 51 and a second fill light 52; the first fill light 51 and the second fill light 52 are disposed on the fixed plate 3 and are located on both sides of the camera unit 4.

[0041] The first supplementary light 51 and the second supplementary light 52 can be visible light, infrared light, or other invisible light supplementary lights, used to provide supplementary lighting for the camera unit 4, facilitating weeding operations at night or on cloudy days, and improving the operational accuracy and effect in low-light environments.

[0042] See Figure 2 Optionally, it also includes a cleaning device 6; the cleaning device 6 is disposed on the fixed plate 3.

[0043] The cleaning device 6 can clean the bottom of the entire laser system, and can be water cleaning, gas cleaning or other cleaning methods that meet the requirements. In one embodiment of this application, compressed air is placed in the cleaning device 6. When the laser component of this application is fixed on the mobile carrier for weeding operations, the control host of the mobile carrier controls the cleaning device 6 to work through a solenoid valve.

[0044] Figure 4 This is a schematic diagram of a control card in a laser assembly according to an embodiment of this application, as shown below. Figure 4 As shown, a laser assembly in one embodiment of this application further includes a control card 7; the control card 7 is connected to the laser 11, chiller 2 and galvanometer 12 in each laser module respectively.

[0045] During weeding operations, camera unit 4 collects crop information for the target area. Figure 5 This is a schematic diagram illustrating the acquisition of crop image data in a target area according to an embodiment of this application. Figure 5 The image data is processed to identify weeds and send the weed location information to the control system of the mobile carrier. The control system sends instructions to the control card 7, which adjusts the deflection angle of the galvanometer 12 and then controls the laser 11 to emit laser light.

[0046] The chiller 2 is connected to the control card 7 via a wire and sends an abnormal alarm signal to the control card 7 so that the control card 7 can control the laser 11 to stop working.

[0047] In one specific embodiment, the weeding operation is carried out as follows:

[0048] The laser module 1 of one embodiment of this application is encapsulated in a cavity with a light outlet. This cavity and the chiller 2 are fixed to a mobile carrier, such as a tractor or other mobile vehicle. After power-on, the camera unit 4 of the laser module 1 acquires image data of crops in the target area. The image processing module built into the camera unit 4 processes this image data, identifies weeds, and sends the weed location information to a module that can interact with an external control system. After receiving the weed location information, the control system sends a command to the control card 7, adjusting the deflection angle of the galvanometer 12 according to the weed location. The control card 7 controls the deflection of the galvanometer 12, then controls multiple lasers to emit laser beams. The beam expander 17 enlarges the diameter of the laser beam, the reflector of the galvanometer 12 changes the direction of the light path, and the field lens 15 focuses the deflected laser beam to eliminate different target weeds. Simultaneously, the chiller 2 starts to maintain the laser module 1 within a certain temperature range. In case of an abnormality, it outputs a signal to the control card 7, which then controls the laser 11 to stop working. The supplementary lighting, integrating visible light, infrared, or other invisible light sources, improves operational accuracy and effectiveness in various environments. Furthermore, the mobile carrier control unit controls the cleaning equipment via solenoid valves.

[0049] The camera unit 4 in the laser assembly can identify weeds in the budding stage and perform data analysis. It can also target and remove overly dense crops, or, based on data analysis, monitor plants with different growth stages and perform targeted thinning on those plants. Simultaneously, the laser beam is adjusted using optical devices such as the galvanometer 12. The laser 11 can be placed horizontally or vertically, achieving efficient space utilization. Through machine vision and artificial intelligence technologies, crops and weeds are classified and identified after being photographed. Precise positioning via laser, without mechanical damage, allows for accurate removal of weeds around crops, significantly improving the efficiency and accuracy of weed control in agricultural production. This helps mitigate soil pollution, increase agricultural income, reduce farmers' labor intensity, and improve the level of agricultural automation.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0051] The various embodiments in this specification are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0052] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A laser assembly for laser weed control, characterized in that, include: At least one set of laser modules, each set of laser modules including a housing, a laser and a galvanometer; the laser is disposed inside the housing, and the galvanometer is disposed on the line corresponding to the orientation of the laser output tube of the laser; Each laser module also includes a cooling tube, which surrounds the laser emission tube of the laser in the same group; The laser assembly also includes a chiller, which is connected to the inlet and outlet of the cooling pipe in each laser module.

2. The laser assembly according to claim 1, characterized in that, Each laser module housing includes an end plate, on which a light guide tube is provided; wherein, the end plate is one end facing the laser emission tube of the laser in the same group; The galvanometer of each laser module is located at one end of the light guide tube in the same group.

3. The laser assembly according to claim 2, characterized in that, Each laser module also includes a field lens; The field lens is positioned on the line corresponding to the light output port of the galvanometer in the same group.

4. The laser assembly according to claim 3, characterized in that, Each laser module also includes a protective mirror; The protective mirror is positioned around the field mirrors in the same group.

5. The laser assembly according to claim 1, characterized in that, Each laser module also includes a beam expander; The beam expander is mounted on the laser output tube of the laser in the same group.

6. The laser assembly according to claim 1, characterized in that, It also includes a fixing plate; the housing of each laser module is disposed on the fixing plate; the fixing plate is provided with light guide holes; the number of light guide holes is equal to the number of laser modules; the light outlet of the galvanometer of each laser module is set one-to-one with each light guide hole on the fixing plate.

7. The laser assembly according to claim 6, characterized in that, It also includes a camera unit; the fixing plate is also provided with a light-transmitting hole; the camera module in the camera unit faces the light-transmitting hole.

8. The laser assembly according to claim 7, characterized in that, It also includes a first fill light and a second fill light; The first fill light and the second fill light are mounted on the fixed plate and are located on both sides of the camera unit.

9. The laser assembly according to claim 6, characterized in that, It also includes cleaning equipment; the cleaning equipment is mounted on the fixed plate.

10. The laser assembly according to claim 1, characterized in that, It also includes a control card; the control card is connected to the laser, chiller and galvanometer in each laser module respectively.

Images