A laser projecting instrument and calibration system convenient for calibration
By creating adjustment holes and guide holes on the outer casing of the laser line projector, and combining them with a robotic arm and calibration components, the problem of complex disassembly during the calibration process of traditional laser line projectors is solved. This achieves an efficient and automated calibration process, protects the internal components of the instrument, and extends its service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NORTHWEST INSTR SHANGHAI
- Filing Date
- 2025-08-27
- Publication Date
- 2026-06-19
AI Technical Summary
Traditional laser line projectors require disassembling the casing during calibration, which makes the disassembly process complex, requires specialized tools, is time-consuming, and can easily damage the casing, affecting calibration efficiency and accuracy.
Adjustment holes are made on the outer casing of the laser line projector, and the counterweight components on the pendulum are adjusted from the outside by a screwing tool without disassembling the outer casing. It is equipped with a removable cover and guide hole section to protect the inside, and automatic calibration is achieved by combining a robotic arm and calibration components.
The counterweight components can be adjusted without disassembling the outer casing, saving calibration time, improving efficiency, protecting the instrument's internal components, extending its service life, and enhancing calibration accuracy and automation.
Smart Images
Figure CN224382488U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of laser line projector technology, and in particular to a laser line projector and calibration system that are easy to calibrate. Background Technology
[0002] A laser line projector (or simply line projector) uses a laser to project one or more highly accurate horizontal or vertical laser lines to replace traditional plumb bobs and chalk lines. It is increasingly being used in interior decoration, equipment installation and other fields.
[0003] Traditional laser line projectors are prone to collisions and drops during use, which can easily lead to accuracy issues. Calibration is typically achieved by controlling the movement of a counterweight screw on the pendulum, which is located inside the projector's casing. Therefore, accuracy calibration requires removing the casing to adjust the pendulum's precision. However, disassembling the casing involves removing many parts, including a transparent glass cover. Repeated disassembly not only soils the glass but also strips the self-tapping screws used to secure the casing, rendering it unusable. Furthermore, disassembling the casing requires specialized skills and tools, significantly increasing calibration time and effort, impacting efficiency, and making maintenance much more difficult. Summary of the Invention
[0004] To address the aforementioned problems, this application provides a laser line projector and calibration system that are easy to calibrate. The design is ingenious, requiring only minor modifications to the existing laser line projector casing. Furthermore, the counterweight components on the pendulum can be adjusted using a screwdriver without disassembling the casing, significantly reducing the time and effort required for instrument accuracy calibration and improving calibration efficiency. The technical solution adopted in this application is as follows:
[0005] A laser line projector for easy calibration includes a housing and a pendulum. The pendulum is installed inside the housing and has a laser module for emitting laser light. Two counterweights are disposed on the pendulum, distributed approximately horizontally and perpendicular to each other. The housing has two adjustment holes, each corresponding to one of the counterweights. External force is applied to the counterweights inside the housing through the adjustment holes to change their position within the pendulum, thereby calibrating the laser line projector.
[0006] In some embodiments, a removable cover is provided outside the adjustment hole, the cover being used to cover the adjustment hole, and the cover being a rubber component.
[0007] In some embodiments, the adjustment hole is a through hole.
[0008] In some embodiments, the through hole is provided with a guide hole section extending axially along the through hole, the guide hole section being located within the housing.
[0009] In some embodiments, the housing includes a lighting module for illuminating the counterweight assembly.
[0010] In some embodiments, the laser module includes a laser module for generating horizontal laser lines and a laser module for generating vertical laser lines, wherein the laser module for generating horizontal laser lines and the laser module for generating vertical laser lines are perpendicular to each other.
[0011] In some embodiments, the laser module for generating a vertical laser line includes laser module I and laser module II, which are perpendicular to each other.
[0012] On the other hand, this application provides a calibration system, including the aforementioned laser line projector, and further including a laser detector for receiving laser emitted by the laser line projector; a robotic arm on which a calibration component is disposed; the robotic arm is configured to drive the calibration component into the adjustment hole and into contact with the counterweight component, the robotic arm rotating to drive the counterweight component to rotate, and the rotation speed and / or time of the robotic arm is determined based on the laser position on the laser detector to calibrate the laser line projector.
[0013] In some embodiments, the calibration system further includes a base platform, a level, and an evaluation device. The base platform supports the laser line projector and the laser detector. The level is positioned on the base platform between the laser line projector and the laser detector. The evaluation device is electrically connected to a robotic arm.
[0014] The laser line projector and calibration system provided in this application have at least one of the following beneficial effects:
[0015] 1. This application provides a laser line projector that is easy to calibrate. By providing adjustment holes on the outer casing of the laser line projector, the counterweight component on the pendulum can be adjusted without disassembling the casing. Instead, a screwing tool can be directly inserted into the casing from the outside through the adjustment holes to screw the counterweight component, thereby adjusting the center of gravity of the pendulum and ultimately calibrating the accuracy of the laser line projector. This application allows adjustment of the counterweight component on the pendulum without disassembling the casing, greatly saving time and effort required for instrument accuracy calibration and improving instrument calibration efficiency. On the other hand, for existing laser line projectors, it is only necessary to replace the outer casing of the existing laser line projector (without adjustment holes) with the outer casing of this application that has adjustment holes, or to add adjustment holes to the outer casing of the existing laser line projector (without adjustment holes), to modify the existing laser line projector into the laser line projector of this application. This modification is easy to implement and has low modification costs.
[0016] 2. The laser line projector provided in this application is easy to calibrate. By setting a detachable cover, the cover is opened when the counterweight component needs to be turned, and the adjustment hole is closed when the counterweight component does not need to be turned. This prevents moisture, dust and other debris from entering the laser line projector through the adjustment hole, ensuring that the inside of the laser line projector is not contaminated and extending the service life of the laser line projector.
[0017] 3. This application provides a laser line projector that is easy to calibrate. By setting a guide hole section, the guide hole section guides the direction in which the screwing tool extends into the housing, allowing the screwing tool to smoothly connect with the counterweight component inside the housing for screwing. The presence of the guide hole section greatly reduces the difficulty of connecting the screwing tool and the counterweight component, and improves the accuracy of the connection.
[0018] 4. The laser line projector provided in this application is easy to calibrate. By setting an illumination module inside the housing, the illumination module can illuminate the counterweight component, providing a reference for determining the position of the counterweight component. It is easy to determine the position of the counterweight component from outside the housing by adjusting the hole position, so that the screwing tool can be smoothly connected with the counterweight component inside the housing.
[0019] 5. The calibration system provided in this application, by setting up a robotic arm and calibration components, can automatically calibrate the accuracy of a laser line projector, thereby improving the efficiency and accuracy of calibration. Attached Figure Description
[0020] The preferred embodiments will be described below in a clear and easy-to-understand manner, with reference to the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of a laser line projector and calibration system that are easy to calibrate:
[0021] Figure 1 This is a schematic diagram of the overall structure of the laser line projector of this application;
[0022] Figure 2 yes Figure 1 A schematic diagram of the structure after the upper shell has been removed in the embodiment;
[0023] Figure 3 This is a schematic diagram of the external structure of the upper shell;
[0024] Figure 4 This is a schematic diagram of the internal structure of the upper shell;
[0025] Figure 5 yes Figure 1 Cross-sectional view after cutting along plane B in the embodiment;
[0026] Figure 6 yes Figure 1 A cross-sectional view taken along surface A in the embodiment.
[0027] Explanation of icon numbers:
[0028] Laser line projector 01, outer shell 1, upper shell 1-1, lower shell 1-2, pendulum body 2, laser module 3, counterweight assembly 4, adjustment hole 5, through hole 5-1, guide hole section 5-2, cover 6, laser module 7, laser module I 7-1, laser module II 7-2, screwing tool 11. Detailed Implementation
[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.
[0030] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."
[0031] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0032] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0033] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0034] refer to Figures 1-6 This application provides a laser line projector that is easy to calibrate, including a housing 1 and a pendulum 2. The pendulum 2 is installed inside the housing 1 and a laser module is installed on the pendulum 2. The pendulum 2 is also provided with two counterweight components 4. The two counterweight components 4 are distributed in a roughly horizontal direction and are perpendicular to each other. The housing 1 has two adjustment holes 5, and the positions of the two adjustment holes 5 correspond to the two counterweight components 4 respectively. External force is applied to the counterweight components 4 inside the housing 1 through the adjustment holes 5 to change the position of the counterweight components 4 in the pendulum 2 and calibrate the laser line projector 01.
[0035] Specifically, the outer casing 1 can be a single unit, or it can be composed of an upper casing 1-1 and a lower casing 1-2, or it can be composed of a left casing and a right casing, or a front casing and a rear casing. This application does not impose any limitations on the specific form of the outer casing 1. This application only uses the outer casing 1 composed of the upper casing 1-1 and the lower casing 1-2 as an example to describe the laser line projector 01 protected by this application. (Reference) Figure 1 , Figure 3 , Figure 4 The adjusting hole 5 is located on the upper shell 1-1. Specifically, the counterweight assembly 4 can be a screw or other component capable of moving relative to the pendulum 2. (See reference) Figure 1 The counterweight assembly 4 can be screwed on using the screwing tool 11 to adjust its position relative to the pendulum 2.
[0036] Another point to note is that the specific form of the adjustment hole 5 can be a window, a square hole, a round hole, etc., opened in the outer shell 1, as long as the screwing tool 11 can be inserted into the outer shell 1 and screwed on the counterweight component 4 without opening the outer shell 1.
[0037] It is understandable that by providing adjustment holes 5 on the outer casing 1 of the laser projector 01, the outer casing 1 can be adjusted without disassembling it when turning the counterweight component 4 on the pendulum 2. Instead, a turning tool 11 can be used to directly enter the outer casing 1 from the outside through the adjustment holes 5 to turn the counterweight component 4, thereby adjusting its movement and thus adjusting the center of gravity of the pendulum 2, ultimately achieving the calibration of the laser projector 01's accuracy. This application allows adjustment of the counterweight component 4 on the pendulum 2 using a turning tool 11 without disassembling the outer casing 1, greatly saving time and effort required for instrument accuracy calibration and improving instrument calibration efficiency. On the other hand, for existing laser projectors, simply replacing the outer casing 1 (without adjustment holes 5) of the existing laser projector with the outer casing 1 of this application that has adjustment holes 5, or providing adjustment holes 5 on the outer casing 1 (without adjustment holes 5) of the existing laser projector, can transform the existing laser projector into the laser projector 01 of this application. This transformation is easy to implement and has low cost.
[0038] refer to Figure 1 In one embodiment, the adjustment hole 5 is provided with a removable cover 6, which is used to cover the adjustment hole 5.
[0039] Specifically, the form of the cap 6 can be adjusted according to the form of the adjustment hole 5. The cap 6 can be a plug or a patch, as long as it can cover the adjustment hole 5. Preferably, the cap 6 is a rubber part, which is durable and inexpensive to obtain. In addition, when the cap 6 is a plug, the rubber part is elastic and easy to insert into the adjustment hole 5; when the cap 6 covers the adjustment hole 5 by adhesive, the rubber part is easier to adhere than metal materials.
[0040] It is easy to understand that by setting a detachable cover 6, the cover 6 is opened when the counterweight component 4 needs to be turned, and the adjustment hole 5 is closed when the counterweight component 4 does not need to be turned, so as to prevent moisture, dust and other debris from entering the laser line projector 01 through the adjustment hole 5, ensuring that the inside of the laser line projector 01 is not contaminated and extending the service life of the laser line projector 01.
[0041] refer to Figure 1 , Figures 3-6 In one embodiment, the adjustment hole 5 is a through hole 5-1. Preferably, the size of the through hole 5-1 is adapted to the screwing tool 11. While ensuring that the screwing tool 11 can be inserted into the housing 1, the size of the through hole 5-1 is kept as small as possible. In this way, the risk of debris entering the housing 1 can be reduced when the cover 6 is not provided.
[0042] refer to Figures 3-6In one embodiment, the through hole 5-1 is provided with a guide hole segment 5-2 extending axially along the through hole 5-1. It is important to note that by providing the guide hole segment 5-2, the guide hole segment 5-2 guides the direction in which the tightening tool 11 extends into the housing 1, allowing the tightening tool 11 to smoothly engage with the counterweight component 4 inside the housing 1 for tightening the counterweight component 4. The presence of the guide hole segment 5-2 significantly reduces the difficulty of engaging the tightening tool 11 with the counterweight component 4 and improves the accuracy of the engagement.
[0043] Specifically, the guide hole section 5-2 can extend outward from the outer shell 1 or into the outer shell 1. This application preferably allows the guide hole section 5-2 to extend into the outer shell 1. In other words, the guide hole section 5-2 is located inside the outer shell 1. This allows control over the external dimensions of the laser line projector 01, preventing it from being too large and affecting storage, transportation, and aesthetics.
[0044] In one embodiment, a lighting module (not shown) is provided inside the housing 1 to illuminate the counterweight component 4. It is understood that by providing a lighting module inside the housing 1, the lighting module can illuminate the counterweight component 4, providing a reference for determining the position of the counterweight component 4, and facilitating the determination of the position of the counterweight component 4 from outside the housing 1 by adjusting the hole 5, so that the screwing tool 11 can smoothly dock with the counterweight component 4 inside the housing 1.
[0045] refer to Figure 2 , Figure 5 , Figure 6 In one embodiment, the laser module includes a laser module 3 for generating horizontal laser lines and a laser module 7 for generating vertical laser lines, wherein the laser module 3 for generating horizontal laser lines and the laser module 7 for generating vertical laser lines are perpendicular to each other. By setting two types of laser modules, the functionality of the laser line projector 01 is improved, enabling the laser line projector 01 to generate not only horizontal laser lines but also vertical laser lines, thereby enhancing the practicality of the laser line projector 01.
[0046] Specifically, the laser module 7 used to generate vertical laser lines can be a single laser module or two laser modules. This application preferably uses two laser modules, namely laser module I 7-1 and laser module II 7-2. Both laser module I 7-1 and laser module II 7-2 are used to generate vertical laser lines, and laser module I 7-1 and laser module II 7-2 are perpendicular to each other.
[0047] On the other hand, this application provides a calibration system, including the aforementioned laser projector, and further including: a laser detector for receiving laser emitted by the laser projector; a robotic arm with a calibration component; the robotic arm is configured to drive the calibration component into the adjustment hole position to contact the counterweight component, the rotation of the robotic arm drives the counterweight component to rotate, and the rotation speed and / or time of the robotic arm are determined based on the laser position on the laser detector to calibrate the laser projector.
[0048] Specifically, the specific structure of the laser line projector can be referred to the aforementioned embodiment. The calibration component is a screwdriver bit, which is adapted to the counterweight component. For example, when the counterweight component is a hexagonal screw, the calibration component is the corresponding screwdriver bit. The screwdriver bit is installed at the execution end of the robotic arm, and the robotic arm can drive the screwdriver bit to move synchronously when it moves. Preferably, a calibration system is equipped with only one robotic arm, which can carry the calibration component into the two adjustment holes on the laser line projector by adjusting its posture. The rotation of the robotic arm can drive the screwdriver bit to rotate, and when the screwdriver bit rotates, it can tighten the counterweight component, thereby adjusting the position of the counterweight component relative to the pendulum. It can be understood that when the speed at which the robotic arm drives the calibration component to rotate is determined, only the rotation time needs to be controlled to control the amount of tightening of the counterweight component; when the rotation time of the robotic arm driving the calibration component is set, only the rotation speed needs to be controlled to control the amount of tightening of the counterweight component. When both the rotation speed and time of the robotic arm are preset, both need to be controlled simultaneously to control the amount of tightening of the counterweight component. The robotic arm observes whether the horizontal laser line generated by the laser module is horizontal during rotation. When the laser line emitted by the laser module that generates the horizontal laser line is horizontal, the line projector completes the calibration.
[0049] Understandably, by setting up a robotic arm and calibration components, the accuracy of the laser line projector can be automatically calibrated, thereby improving the efficiency and accuracy of calibration.
[0050] In one embodiment, the calibration system further includes a base platform, a level, and an evaluation device. The base platform supports the laser line projector and the laser detector. The level is mounted on the base platform and positioned between the laser line projector and the laser detector. The evaluation device is electrically connected to a robotic arm.
[0051] It is worth noting that, by using a level, the physical distance between the laser projector and the laser detector can be optically magnified and extended. This allows for the simulation of an amplified optical path distance between the laser projector and the laser detector while maintaining the physical distance between them (i.e., both being on the same base platform). This amplified optical path distance enables calibration of the laser projector 1, improving calibration accuracy. For example, even with a distance of only 30 centimeters between the laser projector and the laser detector, it can simulate a distance of 6 meters. This allows for calibration accuracy achievable at a distance of 6 meters without increasing the actual physical distance or imposing space requirements on calibration. For those skilled in the art, a level is a common optical adjustment device; therefore, this application does not describe the specific structure of the level. The optical path extension factor of the level can be 32 times, 26 times, or a factor selected according to actual needs.
[0052] The evaluation device is configured to acquire the laser position on the laser detector, determine the calibration value of the laser projector based on the deviation distance of the horizontal laser line emitted by the laser projector on the laser detector before and after rotation of a first angle, and calculate the rotational speed and / or time of the robotic arm based on the calibration value. Preferably, the first angle is one of 180 degrees, 90 degrees, or 270 degrees.
[0053] In one embodiment, the evaluation apparatus includes an image recognition device and a control unit. The image recognition device is configured to acquire an image of a laser projected onto a laser detector and, based on image recognition technology, determine the deviation distance of the horizontal laser line emitted by the laser projector on the laser detector before and after rotation by a first angle. The control unit is configured to receive the deviation distance transmitted by the image recognition device, and, based on the deviation distance, the optical path extension factor of the level, the position of the laser projector, the position of the laser detector, and the first angle, determine whether the laser projector needs calibration and by how much, and calculate the rotational speed and / or time of the robotic arm based on the calibration amount. The image recognition device includes a smartphone, tablet, and / or a camera.
[0054] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.
Claims
1. A laser line projector for easy calibration, comprising a housing and a pendulum, the pendulum being installed within the housing, a laser module for emitting laser light being mounted on the pendulum, and two counterweight components being disposed on the pendulum, the two counterweight components being distributed approximately horizontally and perpendicular to each other, characterized in that, The outer casing has two adjustment holes, the positions of which correspond to the two counterweight components. External force is applied to the counterweight components inside the outer casing through the adjustment holes to change the position of the counterweight components in the pendulum body and calibrate the laser projector.
2. The laser line projector for easy calibration according to claim 1, characterized in that, The adjustment hole is provided with a detachable cover, which is used to cover the adjustment hole and is made of rubber.
3. The laser line projector for easy calibration according to claim 1, characterized in that, The adjustment hole is a through hole.
4. A laser line projector for easy calibration according to claim 3, characterized in that, The through hole is provided with a guide hole section extending along the axial direction of the through hole, and the guide hole section is located inside the housing.
5. A laser line projector for easy calibration according to claim 1, characterized in that, The housing contains a lighting module for illuminating the counterweight assembly.
6. A laser line projector for easy calibration according to any one of claims 1-5, characterized in that, The laser module includes a laser module for generating horizontal laser lines and a laser module for generating vertical laser lines, with the laser module for generating horizontal laser lines and the laser module for generating vertical laser lines being perpendicular to each other.
7. A laser line projector for easy calibration according to claim 6, characterized in that, The laser module for generating vertical laser lines includes laser module I and laser module II, which are perpendicular to each other.
8. A calibration system, characterized in that, The laser line projector according to any one of claims 1-7 further includes: A laser detector, used to receive the laser emitted by the laser line projector; A robotic arm, on which a calibration component is provided; the robotic arm is configured to drive the calibration component into the adjustment hole and into contact with the counterweight component; the rotation of the robotic arm drives the counterweight component to rotate; and the rotation speed and / or time of the robotic arm are determined based on the laser position on the laser detector to calibrate the laser projector.
9. A calibration system according to claim 8, characterized in that, It also includes a base platform, a level, and an evaluation device. The base platform supports the laser line projector and the laser detector. The level is mounted on the base platform and between the laser line projector and the laser detector. The evaluation device is electrically connected to a robotic arm.