An adjustable external reference calibration tool for a lawn mower

Abstract

The utility model discloses an adjustable outer reference calibration tool for mower, it includes industrial computer, the upper surface fixed connection of industrial computer has calibration module, the upper top wall fixed connection of calibration module has linear bearing, the upper surface fixed connection of industrial computer has jacking cylinder, the output fixed connection of jacking cylinder has moving plate, the upper surface fixed connection of moving plate has slide, the upper surface fixed connection of industrial computer has frame, the inside surface sliding connection of frame has calibration board, the side surface screw connection of frame has left and right adjustment screw, the inner week of calibration board is pasted with black flannelette. Through above component, through the accurate orientation cooperation of slide and linear bearing, the angle compensation design of left and right adjustment screw, realize the high accuracy calibration of reducing positioning error and angle error, compared with manual operation, the artificial deviation is reduced greatly, and the calibration consistency and reliability are more superior.

Description

Technical Field

[0001] This utility model relates to the field of external parameter calibration technology for lawnmowers, and in particular to an adjustable external parameter calibration fixture for lawnmowers. Background Technology

[0002] In the manufacturing and performance debugging of lawnmowers, external parameter calibration is a crucial step in ensuring their operational accuracy. It directly affects the lawnmower's positioning accuracy in the work area, the rationality of path planning, and the precise control of the mowing range, playing an irreplaceable role in improving the quality and efficiency of lawnmower operations. However, with the increasing demands for operational accuracy in the lawn maintenance industry and the diversification of lawnmower product specifications, traditional external parameter calibration methods have gradually revealed many shortcomings and are no longer sufficient to meet actual production and application needs.

[0003] Traditional lawnmower external parameter calibration relies heavily on manual operation. Operators adjust the position and angle of calibration components based on experience, which is not only labor-intensive and inefficient but also makes it difficult to guarantee the stability of calibration accuracy. Due to human error, the positioning error after calibration typically exceeds 5mm, and the angular error is difficult to control within 0.1 degrees. This directly leads to problems such as missed mowing, double mowing, or irregular edge cutting during lawnmower operation, significantly reducing work quality. Furthermore, manual operation is highly subjective; different operators or even the same operator performing different calibrations can produce significantly different results, resulting in extremely poor calibration consistency and reliability, causing numerous inconveniences for subsequent product quality inspection and mass production. In addition, some special testing scenarios require calibration using specific wavelengths of light, but traditional calibration devices lack effective light control methods. The signal emitted by the calibration board is easily interfered with by external stray light and cannot meet the emission requirements of light invisible to the human eye, leading to unstable calibration signal reception, further affecting calibration accuracy and limiting the application range of the calibration device. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the technical problems existing in the prior art, and to provide an adjustable external parameter calibration fixture for lawnmowers. This fixture solves the problems of large human error, insufficient consistency and reliability in manual calibration, complex modification required for different specifications of lawnmowers, poor versatility and low production efficiency, and the inability of the machine to accurately receive calibration signals due to stray light interference, which limits the application scenarios. High-precision calibration is achieved through the precise guiding cooperation of the slide rod and linear bearing and the angle compensation design of the left and right adjustment screws. At the same time, the adjustable frame structure and the mode switching function of the switch allow for quick fine adjustment of the calibration plate position to adapt to different specifications of lawnmowers. In addition, the calibration plate emits invisible light through the built-in light-emitting module, and the outer light-blocking cloth and inner black velvet cloth isolate stray light, thus comprehensively improving the calibration effect and the practicality of the device.

[0005] This utility model also provides an adjustable external parameter calibration fixture for a lawnmower, comprising: an industrial computer, a calibration module fixedly connected to the upper surface of the industrial computer, a linear bearing fixedly connected to the upper top wall of the calibration module, a lifting cylinder fixedly connected to the upper surface of the industrial computer, a moving plate fixedly connected to the output end of the lifting cylinder, and a sliding rod fixedly connected to the upper surface of the moving plate. A frame is fixedly connected to the upper surface of the industrial computer. A calibration plate is slidably connected to the inner side of the frame. Left and right adjustment screws are threaded onto the side surface of the frame. Black velvet is affixed to the inner circumference of the calibration plate. Through these components, the precise guiding cooperation between the slide rod and the linear bearing, and the angle compensation design of the left and right adjustment screws, high-precision calibration with reduced positioning and angular errors is achieved. Compared with manual operation, human error is significantly reduced, resulting in better calibration consistency and reliability.

[0006] According to the present invention, an adjustable external parameter calibration fixture for a lawnmower includes two symmetrically distributed frame plates fixedly connected to the side surface of the calibration module. The frame plates support the lawnmower tires before calibration.

[0007] According to the present invention, an adjustable external parameter calibration fixture for a lawnmower includes two symmetrically distributed start buttons on the side surface of the industrial computer. Both buttons must be pressed simultaneously to trigger the action, preventing accidental operation and ensuring accurate transmission of start and stop commands.

[0008] According to the present invention, an adjustable external parameter calibration fixture for a lawnmower includes a movable plate whose side surface is slidably connected to a calibration module, and a sliding rod whose side surface is slidably connected to a linear bearing. This sliding engagement with the linear bearing further restricts the lateral displacement of the movable plate, ensuring the verticality and stability of the lifting action.

[0009] According to the present invention, an adjustable external parameter calibration fixture for a lawnmower includes a three-piece assembly on the side surface of the industrial control computer and an indicator light on the upper surface of the industrial control computer. The compressed air for the pneumatic system is filtered and depressurized to provide a clean and stable air source for the lifting cylinder, ensuring its smooth operation.

[0010] According to the present invention, an adjustable external parameter calibration fixture for a lawnmower includes an anti-static wrist strap and a selector switch on the side surface of the industrial control computer. This allows for the release of static electricity from the operator's body, preventing electrostatic discharge from damaging electronic components or interfering with calibration signals.

[0011] According to the present invention, an adjustable external parameter calibration fixture for a lawnmower includes a bracket fixedly connected to the side surface of the industrial control computer, a display fixedly connected to the side surface of the bracket, and a mouse and keyboard mounted on the surface of the bracket. This design ensures a reasonable and user-friendly layout of the operating terminal. The display shows the calibration progress, parameters, and fault prompts in real time, while the mouse and keyboard are used for parameter settings, program startup, and data export operations on the industrial control computer.

[0012] According to the present invention, an adjustable external parameter calibration fixture for a lawnmower includes four casters on the lower surface of the industrial control computer, distributed at the four corners of the computer. These casters can support the overall weight of the fixture, enabling flexible movement and positioning locking, and adapting to different production station layouts.

[0013] Beneficial effects: This technical solution is used for adjustable external parameter calibration fixtures for lawnmowers. Through precise guidance and coordination between the sliding rod and linear bearing, and angle compensation design of the left and right adjustment screws, it achieves high-precision calibration with a positioning error of <2mm and an angular error of <0.05 degrees. Compared to manual operation, this significantly reduces human error, resulting in superior calibration consistency and reliability. Utilizing the adjustable frame structure and mode switching function of the changeover switch, the calibration plate position can be quickly fine-tuned to adapt to different specifications of lawnmowers. Changeover production can be completed without complex modifications, improving equipment versatility and production efficiency. The calibration plate has a built-in light-emitting module, combined with an outer light-blocking cloth and an inner black velvet cloth, which emits invisible light to meet special testing requirements while isolating stray light interference, ensuring the machine accurately receives the calibration signal, thus broadening the device's application scenarios and adaptability. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a front view of the overall structure of the adjustable external parameter calibration fixture for a lawnmower according to this utility model; Figure 2 This is a rear view of the overall structure of the adjustable external parameter calibration fixture for a lawnmower according to this utility model. Figure 3 This is a structural diagram of the movable plate of the adjustable external parameter calibration fixture for a lawnmower according to this utility model; Figure 4 This is a structural diagram of the calibration plate of the adjustable external parameter calibration fixture for lawnmowers according to this utility model.

[0015] Legend: 1. Industrial computer; 2. Fuma wheel; 3. Triple unit; 4. Calibration module; 5. Stand; 6. Start button; 7. Moving board; 8. Monitor; 9. Mouse and keyboard; 10. Frame; 11. Indicator light; 12. Anti-static wrist strap; 13. Bracket; 14. Lifting cylinder; 15. Slide rod; 16. Linear bearing; 17. Calibration board; 18. Left and right adjustment screws; 19. Changeover switch. Detailed Implementation

[0016] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0017] Reference Figure 1-4 This utility model provides an adjustable external parameter calibration fixture for a lawnmower, comprising: an industrial computer 1, a calibration module 4 fixedly connected to the upper surface of the industrial computer 1, a frame plate 5 fixedly connected to the side surface of the calibration module 4, two frame plates 5 symmetrically distributed, a linear bearing 16 fixedly connected to the upper top wall of the calibration module 4, a lifting cylinder 14 fixedly connected to the upper surface of the industrial computer 1, a moving plate 7 fixedly connected to the output end of the lifting cylinder 14, a side surface of the moving plate 7 slidably connected to the calibration module 4, a slide rod 15 fixedly connected to the upper surface of the moving plate 7, and a side surface of the slide rod 15 slidably connected to the linear bearing 16; Specifically, the industrial control computer 1, as the core control center of the entire calibration fixture, is responsible for running the calibration algorithm, receiving feedback signals from various components, and synchronously controlling the entire process, providing a stable installation foundation and control support for each component; the calibration module 4 is fixedly connected to the upper surface of the industrial control computer 1, providing an installation carrier for the support plate 5 and linear bearing 16, and also has built-in auxiliary structures to facilitate the accurate execution of subsequent calibration operations; two symmetrically distributed support plates 5 are fixed to the side surface of the calibration module 4 to support the lawnmower tires before calibration, initially defining the placement position of the lawnmower and preventing tire offset from causing deviations in subsequent positioning; the linear bearing 16 is fixed to the top wall of the calibration module 4, cooperating with the slide rod 15 to achieve precise linear guidance and reduce friction and offset during the sliding process; the lifting cylinder 14... As a core execution component, it is fixed to the upper surface of the industrial control computer 1. After receiving control commands, it can push the moving plate 7 to achieve smooth lifting and lowering, thereby driving the lawnmower to reach the target positioning or reset. The moving plate 7 is connected to the output end of the lifting cylinder 14 and is used to support the lawnmower to be calibrated. Its side surface is slidably connected to the calibration module 4 to ensure horizontal stability during the lifting process. The slide rod 15 fixed on the upper surface slides and cooperates with the linear bearing 16 to further limit the lateral displacement of the moving plate 7, ensuring the verticality and stability of the lifting action, and together meeting the accuracy requirement that the positioning error of the machine under test is less than 2mm. When in use, a light-shielding cloth can be placed around the industrial control computer 1 to block the external ambient light (such as workshop lights and natural light) and create a stable calibration light environment to avoid stray light interfering with the calibration board signal recognition.

[0018] The upper surface of the industrial computer 1 is fixedly connected to a frame 10, the inner side of the frame 10 is slidably connected to a calibration plate 17, the side surface of the frame 10 is threadedly connected to left and right adjustment screws 18, and the inner circumference of the calibration plate 17 is covered with black velvet.

[0019] Specifically, the frame 10 serves as the mounting and adjustment carrier for the calibration plate 17, providing stable support and ensuring smooth sliding adjustment. The left and right adjustment screws 18 can be rotated to finely adjust the horizontal position and angle of the calibration plate 17, thereby compensating for minor deviations during installation or use and meeting the accuracy requirement of tooling angle error of less than 0.05 degrees. As the core reference component for external parameter calibration, the calibration plate 17 has a built-in light-emitting module that can emit light invisible to the human eye to adapt to special test scenarios. The black velvet cloth attached to the inner circumference can absorb reflected light, reduce stray light interference, improve the contrast between the calibration target point and the background, and ensure the accuracy of lawnmower calibration signal reception.

[0020] The industrial computer 1 has two start buttons 6 on its side surface, which are symmetrically distributed. The industrial computer 1 also has a three-piece assembly 3 on its side surface. The industrial computer 1 has an indicator light 11 on its upper surface. The industrial computer 1 has an electrostatic wrist strap 12 on its side surface. The industrial computer 1 has a changeover switch 19 on its side surface. The industrial computer 1 has a bracket 13 fixedly connected to its side surface. The bracket 13 has a monitor 8 fixedly connected to its side surface. The bracket 13 has a mouse and keyboard 9 on its surface. The industrial computer 1 has four fuma wheels 2 on its lower surface, which are distributed at the four corners of the industrial computer 1.

[0021] Specifically, four casters 2 distributed at the four corners of the industrial control computer 1 can support the overall weight of the tooling, enabling flexible movement and positioning of the tooling, and adapting to different production station layouts. The bracket 13 is used to fix and support the monitor 8 and mouse and keyboard 9, ensuring that the operation terminal layout is reasonable and easy to use. The monitor 8 displays the calibration progress, parameters and fault prompts in real time. The mouse and keyboard 9 are used for parameter setting, program start and data export of the industrial control computer 1. The two symmetrically distributed start buttons 6 require both hands to press simultaneously to trigger the action, which not only prevents misoperation but also accurately transmits start and stop commands. The triple unit 3 filters and depressurizes the compressed air of the pneumatic system, providing a clean and stable air source for the lifting cylinder 14 to ensure its smooth operation. The electrostatic wrist strap 12 can release the static electricity of the operator's body to avoid static electricity from damaging electronic components or interfering with the calibration signal. The selector switch 19 is used to switch the tooling working mode (such as manual / automatic). The indicator light 11 indicates the calibration process in progress, completed or faulty through different statuses, making it convenient for the operator to keep track of the process progress.

[0022] Working principle: After the operator puts on the electrostatic wrist strap 12, the lawnmower to be calibrated is placed on the frame plate 5 for initial positioning. Then, the operator presses the start button 6 with both hands simultaneously. After receiving the instruction, the industrial control computer 1 starts the lifting cylinder 14 through the PLC. The lifting cylinder 14 pushes the moving plate 7 upward. The moving plate 7 slides along the calibration module 4, and the slide rod 15 is smoothly guided along the linear bearing 16, which together lifts the lawnmower to the calibration position. At the same time, the PLC controls the relay to activate and feed the signal back to the industrial control computer 1 to start the calibration program. The calibration module 4 assists the calibration plate 17 in emitting calibration signals. The lawnmower receives the signals and completes the external parameter calibration. During the calibration process, the display 8 shows the progress in real time. When it is completed, the indicator light 11 lights up to indicate that the operator has pressed the start button 6 again. The lifting cylinder 14 drives the moving plate 7 and the lawnmower back down. The operator takes the product away to complete one calibration. If it is necessary to change the model, the position of the calibration plate 17 can be finely adjusted by adjusting the left and right screws 18. The adaptation mode can be switched by switching the conversion switch 19 to achieve quick model change.

[0023] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An adjustable external parameter calibration fixture for a lawnmower, characterized in that, include: An industrial computer (1) is provided with a calibration module (4) fixedly connected to its upper surface. A linear bearing (16) is fixedly connected to the upper top wall of the calibration module (4). A lifting cylinder (14) is fixedly connected to the upper surface of the industrial computer (1). A moving plate (7) is fixedly connected to the output end of the lifting cylinder (14). A slide rod (15) is fixedly connected to the upper surface of the moving plate (7). The upper surface of the industrial computer (1) is fixedly connected to a frame (10), the inner side of the frame (10) is slidably connected to a calibration plate (17), the side surface of the frame (10) is threaded with left and right adjustment screws (18), and the inner circumference of the calibration plate (17) is covered with black velvet.

2. The adjustable external parameter calibration fixture for a lawnmower according to claim 1, characterized in that, The calibration module (4) has a frame plate (5) fixedly connected to its side surface. There are two frame plates (5) that are symmetrically distributed.

3. The adjustable external parameter calibration fixture for a lawnmower according to claim 1, characterized in that, The industrial computer (1) has two start buttons (6) on its side surface. The start buttons (6) are symmetrically distributed.

4. The adjustable external parameter calibration fixture for a lawnmower according to claim 1, characterized in that, The side surface of the movable plate (7) is slidably connected to the calibration module (4), and the side surface of the slide rod (15) is slidably connected to the linear bearing (16).

5. The adjustable external parameter calibration fixture for a lawnmower according to claim 1, characterized in that, The industrial computer (1) has a three-piece assembly (3) on its side surface and an indicator light (11) on its upper surface.

6. The adjustable external parameter calibration fixture for a lawnmower according to claim 1, characterized in that, An electrostatic wrist strap (12) is provided on the side surface of the industrial computer (1), and a changeover switch (19) is provided on the side surface of the industrial computer (1).

7. The adjustable external parameter calibration fixture for a lawnmower according to claim 1, characterized in that, The industrial computer (1) has a bracket (13) fixedly connected to its side surface, and a display (8) is fixedly connected to the side surface of the bracket (13). A mouse and keyboard (9) are provided on the surface of the bracket (13).

8. The adjustable external parameter calibration fixture for a lawnmower according to claim 1, characterized in that, The lower surface of the industrial computer (1) is provided with four fusible wheels (2) distributed at the four corners of the industrial computer (1).

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