Line casting device and calibration device

Abstract

The invention discloses a demarcation device and a calibration device. The demarcation device comprises a shell; the swinging body is arranged in the shell; the at least one vertical laser module is fixedly connected with the pendulum body and is used for emitting vertical laser; the horizontal laser module is fixedly connected with the pendulum body and is used for emitting horizontal laser; the automatic leveling device is arranged in the pendulum body and used for adjusting balance of the pendulum body, the automatic leveling device comprises a motor, an installation block and a balancing weight which is located in the installation block and installed with the motor in a linkage mode, and the motor rotates to drive the balancing weight to horizontally move in the installation block. According to the demarcation device and the calibration device, the position of the balancing weight is adjusted through the motor, calibration of the demarcation device is automatically achieved, and the calibration efficiency and precision are improved.

Description

Technical Field

[0001] This invention belongs to the field of line projector technology, specifically relating to a line projector and calibration device. Background Technology

[0002] Traditional telescopes may develop accuracy deviations after prolonged use, especially after impacts or drops, requiring counterweight calibration. Manual calibration necessitates disassembling the outer casing to adjust the counterweight screws in the internal mechanism's pendulum. However, disassembly is cumbersome, requiring the removal of multiple components, including the glass cover. Repeated disassembly and reassembly not only easily contaminate the glass window, affecting observation clarity, but also, since the casing is typically secured with self-tapping screws, repeated operations can easily strip the screw holes, rendering the entire casing unusable. Furthermore, the disassembly calibration operation demands a high level of professional skill from the operator and specialized tools; manual calibration can easily compromise accuracy, resulting in low efficiency and significantly increasing calibration difficulty and maintenance costs.

[0003] Therefore, in order to address the aforementioned technical problems, it is necessary to provide a line projector and a calibration device.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a line projector and calibration device that can automatically calibrate the line projector without disassembling the casing, avoiding the tedious operation of manual calibration and greatly improving calibration efficiency and accuracy.

[0006] To achieve the above objectives, a specific embodiment of the present invention provides the following technical solution:

[0007] A line projector, the line projector comprising:

[0008] shell;

[0009] The pendulum body is installed in the outer casing;

[0010] At least one vertical laser module is fixedly connected to the pendulum body for emitting vertical lasers;

[0011] A horizontal laser module is fixedly connected to the pendulum body and is used to emit horizontal lasers;

[0012] An automatic leveling device is installed in the pendulum body to adjust the balance of the pendulum body. The automatic leveling device includes a motor, a mounting block, and a counterweight block located inside the mounting block and installed in conjunction with the motor. The rotation of the motor drives the counterweight block to move horizontally within the mounting block.

[0013] In one or more embodiments of the present invention, the mounting block is disposed opposite to the vertical laser module, the mounting block is provided with mounting holes, the motor is fixedly mounted in the mounting holes, the counterweight is slidably mounted in the mounting holes, the automatic leveling device further includes a transmission component, one end of the transmission component is connected to the output shaft of the motor, and the other end is connected to the counterweight. The rotation of the motor drives the counterweight to move horizontally within the mounting block through gears.

[0014] In one or more embodiments of the present invention, the mounting block is movably connected to the pendulum body, and the mounting block can move horizontally under the action of external force.

[0015] In one or more embodiments of the present invention, a power module and a control module are further provided inside the housing. The power module is electrically connected to the vertical laser module, the horizontal laser module, the control module and the motor respectively. The control module is used to control the motor operation.

[0016] In one or more embodiments of the present invention, a calibration switch is provided on the housing, and the control module receives the trigger command of the calibration switch to control the motor to operate.

[0017] In one or more embodiments of the present invention, a wireless communication module is further provided inside the housing. The wireless communication module is configured to establish a communication connection with an external terminal device to receive calibration control commands from the terminal device. The control module receives the calibration control commands to control the motor operation.

[0018] In one or more embodiments of the present invention, the mounting block includes a mounting portion and a limiting portion disposed in the pendulum body, wherein the outer diameter of the limiting portion is larger than the outer diameter of the mounting portion.

[0019] In one or more embodiments of the present invention, one of the mounting block and the counterweight block is provided with a guide groove, and the other is provided with a guide protrusion that cooperates with the guide groove.

[0020] Another specific embodiment of the present invention provides the following technical solution:

[0021] A calibration device, comprising a platform and a base, an optical path extension device, an evaluation device, and a target sequentially disposed on the platform;

[0022] The base is configured for the fixed installation of a line projector as described above;

[0023] The optical path extension device is used to receive the laser emitted by the laser projector and project it onto the target after adjustment by the optical path extension device;

[0024] The evaluation device is used to acquire the laser spot image projected onto the target by the optical path extension device. Based on the laser spot images projected onto the target by the line projector before and after rotating at the first angle, the deviation distance is calculated. Based on the deviation distance, it is determined whether the line projector needs to be calibrated and the calibration amount. The control module controls the motor to rotate according to the calibration amount, which drives the counterweight block to move horizontally within the mounting block to calibrate the line projector.

[0025] In one or more embodiments of the present invention, the evaluation device includes an image recognition device and a controller. When the image recognition device determines that calibration is required, the controller generates a calibration control command based on the deviation distance and sends the calibration control command to the wireless communication module of the line projector so that the control module of the line projector can perform automatic calibration.

[0026] In one or more embodiments of the invention, the base further includes an adjustment device configured to drive the projector to rotate about its own central axis by the first angle in response to an adjustment control command from the evaluation device.

[0027] In one or more embodiments of the present invention, the first angle is 90°, 180° or 270°.

[0028] Compared with the prior art, the line projector and calibration device of the present invention automatically calibrates the pendulum in the line projector by automatically adjusting the position of the counterweight by the motor, avoiding the tedious operation of manual calibration and greatly improving calibration efficiency and accuracy. At the same time, since there is no need to disassemble the casing, it can avoid contamination of the glass window of the casing and also avoid stripping of the self-tapping screws, thus increasing the service life of the line projector. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional structural diagram of the calibration device in one embodiment of the present invention.

[0031] Figure 2 This is a three-dimensional structural diagram of the line projector in one embodiment of the present invention;

[0032] Figure 3 This is a three-dimensional structural diagram of a line projector lacking part of its outer casing in one embodiment of the present invention;

[0033] Figure 4 This is a front view schematic diagram of the projector without a portion of its outer casing in one embodiment of the present invention.

[0034] Figure 5 This is a schematic diagram of the front cross-sectional structure of the projector without a portion of its outer casing in one embodiment of the present invention.

[0035] Figure 6 This is a schematic diagram of the left cross-sectional structure of the projector in one embodiment of the present invention, showing a portion of the outer casing missing.

[0036] Figure 7 This is a three-dimensional structural diagram of the automatic leveling device in one embodiment of the present invention;

[0037] Figure 8 This is a schematic diagram of the right side of the automatic leveling device in one embodiment of the present invention;

[0038] Explanation of key figure labels:

[0039] 100-Line Projector;

[0040] 1-Outer shell;

[0041] 2-Pendulum;

[0042] 3-Vertical laser module;

[0043] 4-Horizontal laser module;

[0044] 5-Automatic leveling device; 51-Mounting block; 510-Mounting hole; 511-Mounting part; 512-Limiting part; 513-Guide groove; 52-Motor; 521-Output shaft; 53-Transmission component; 54-Counterweight; 540-Assembly hole; 541-Main body; 542-Guide protrusion; 5421-Guide surface; 5422-Clearing surface;

[0045] 6-Platform;

[0046] 71-Base; 711-Adjustment device; 72-Optical path extension device; 721-Mounting base; 73-Evaluation device; 731-Mounting rod; 74-Target. Detailed Implementation

[0047] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0048] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0050] To address the technical problem in existing technologies where calibration of a line projector requires disassembling the outer casing to adjust the counterweight screws in the internal mechanism's pendulum, the inventor conceived of a structural design that can receive calibration control commands via a control module to control the motor's start, stop, and / or rotation direction, thereby automatically calibrating the pendulum. This design can automate the calibration of the line projector's accuracy, improve calibration efficiency, and reduce calibration difficulty and maintenance costs.

[0051] Based on the above-mentioned inventive concept, the inventors of this disclosure conceived of designing a line projector and a calibration device.

[0052] The laser projector includes: a housing, a pendulum, at least one vertical laser module, a horizontal laser module, and an automatic leveling device. The pendulum is mounted within the housing; the vertical laser module is fixedly connected to the pendulum and emits a vertical laser; the horizontal laser module is fixedly connected to the pendulum and emits a horizontal laser; the automatic leveling device is located within the pendulum and is used to adjust its balance. The automatic leveling device includes a motor, a mounting block, and a counterweight located within the mounting block and linked to the motor. The motor's rotation causes the counterweight to move horizontally within the mounting block.

[0053] The calibration device includes a platform and a base, an optical path extension device, an evaluation device, and a target sequentially arranged on the platform. The base is configured to fix the projector as described above. The optical path extension device is used to receive the laser emitted by the projector and project it onto the target after adjustment by the optical path extension device. The evaluation device is used to acquire the laser spot image projected onto the target by the optical path extension device. Based on the laser spot images projected onto the target by the projector before and after rotating the first angle, the deviation distance is calculated. Based on the deviation distance, it is determined whether the projector needs to be calibrated and the calibration amount. The control module controls the motor to rotate according to the calibration amount, driving the counterweight to move horizontally within the mounting block to calibrate the projector.

[0054] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0055] Reference Figure 1As shown, the calibration device in this embodiment may include a platform 6 and a base 71, an optical path extension device 72, an evaluation device 73, and a target 74, which can be sequentially disposed on the platform 6. The base 71 is configured to fix the projector 100 in place. The optical path extension device 72 receives the laser emitted by the projector 100 and projects it onto the target 74 after adjustment by the optical path extension device 72. The evaluation device 73 acquires the laser spot image projected onto the target 74 by the optical path extension device 72. Based on the laser spot images projected onto the target 74 by the projector 100 before and after rotating a first angle, the deviation distance is calculated. Based on the deviation distance, it is determined whether the projector 100 needs calibration and the calibration amount. The control module in the projector 100 controls the motor 52 to rotate according to the calibration amount, driving the counterweight 54 to move horizontally within the mounting block 51 to calibrate the projector 100.

[0056] Specifically, the platform 6 is provided with a first position, a second position, a third position, and a fourth position at intervals along its length. A base 71 is provided at the first position, an optical path extension device 72 is provided at the second position, an evaluation device 73 is provided at the third position, and a target 74 is provided at the fourth position. The second position of the platform 6 typically has a mounting base 721 for fixing the optical path extension device 72; the third position typically has a mounting rod 731 for fixing the evaluation device 73.

[0057] Among them, reference Figures 2-8 As shown, the laser projector 100 in this embodiment may include a housing 1, a pendulum 2, at least one vertical laser module 4, a horizontal laser module 3, and an automatic leveling device 5. The pendulum 2 is installed in the housing 1; at least one vertical laser module 4 is fixedly connected to the pendulum 2 for emitting vertical laser lines; the horizontal laser module 3 is fixedly connected to the pendulum 2 for emitting horizontal laser lines; the automatic leveling device 5 is connected to the pendulum 2 for adjusting the balance of the pendulum 2. The automatic leveling device includes a motor 52, a mounting block 51, and a counterweight 54 located within the mounting block 51 and linked to the motor 52. The rotation of the motor 52 drives the counterweight 54 to move horizontally within the mounting block 51.

[0058] Specifically, in this embodiment, the housing 1 of the laser projector 100 contains a control module and a power module. The control module is used to control the operation of the motor 52. Specifically, the control module is electrically connected to the motor 52 and is configured to control the start, stop, and / or rotation direction of the motor 52. To facilitate power supply to the motor 52, the vertical laser module 4, the horizontal laser module 3, and the control module, the power module in this embodiment can be a storage battery.

[0059] Furthermore, the projector 100 in this embodiment also includes a calibration switch, which is disposed on the housing. The calibration switch is electrically connected to the control module, and the control module can receive a trigger command from the calibration switch to control the start or stop of the motor 52. Under normal circumstances, the calibration switch and the control module are in a disconnected mode. When calibration is required, the user can trigger the calibration switch to connect the calibration switch and the control module, and the calibration switch controls the start of the motor 52.

[0060] Preferably, the housing 1 of this embodiment also includes a wireless communication module. This wireless communication module is configured to establish a communication connection with an external terminal device or evaluation device 73 to receive calibration control commands transmitted from the terminal device or evaluation device 73. The control module is configured to control the start, stop, and / or rotation direction of the motor 52 according to the calibration control commands received via the wireless communication module. To facilitate receiving calibration control commands issued by the evaluation device 73, the wireless communication module in this embodiment is one of a Bluetooth module, a Wi-Fi module, and an infrared module.

[0061] Based on this design, the accuracy calibration of the laser projector 100 can be automatically achieved by controlling the position of the counterweight 54 within the projector 100 via the motor 52. This reduces deviations in the laser line emitted by the projector 100, avoids the tedious manual calibration process, significantly improves calibration efficiency and accuracy, and reduces calibration difficulty and maintenance costs. Simultaneously, since disassembly is unnecessary, contamination of the glass window of the outer casing 1 is avoided, as is stripping of the self-tapping screws, thus increasing the service life of the projector 100. This automatic leveling device is also used to adjust the angle of the pendulum 2.

[0062] Specifically, refer to Figures 2-8 As shown, the line projector 100 in this embodiment includes two horizontally arranged vertical laser modules 4 and one horizontal laser module 3. The angle between the two vertical laser modules 4 is approximately right-angled, and the angle between the horizontal laser module 3 and each of the two vertical laser modules 4 is approximately right-angled. Two automatic leveling devices 5 are provided, each positioned opposite to its corresponding vertical laser module 4. Of course, this application is not limited to this; in other embodiments, the line projector 100 may have three (four, five, etc.) vertical laser modules 4, with each pair of adjacent vertical laser modules 4 arranged at an angle, such as 30°, 60°, or 120°, all of which fall within the protection scope of this application and are understood and accepted by those skilled in the art.

[0063] Reference Figures 5-8As shown, in this embodiment, the mounting block 51 is positioned opposite to the vertical laser module 4. The mounting block 51 has a mounting hole 510, in which the motor 52 is fixedly mounted, and the counterweight 54 is slidably mounted. The automatic leveling device 5 may also include a transmission component 53. One end of the transmission component 53 is connected to the output shaft of the motor 52, and the other end is connected to the counterweight 54. Specifically, the counterweight 54 in this embodiment may have an assembly hole 540, with an internal thread on the hole wall. The outer wall of the transmission component 53 has an external thread that mates with the internal thread, allowing the transmission component 53 to be helically mounted in the counterweight 54. The transmission component 53 may be a stud, screw, bolt, or helical gear, or any other structure that can be helically mounted in the counterweight 54. Since the motor 52 is fixedly installed in the mounting hole 510, when the transmission component 53 rotates with the output shaft 521 of the motor 52, the rotation of the transmission component 53 can be converted into the linear reciprocating sliding motion of the counterweight 54 in the horizontal direction under the cooperation of the internal and external threads. The position of the counterweight 54 in the mounting block 51 is adjusted by the motor 52 to calibrate the pendulum 2.

[0064] In one embodiment of the present invention, the mounting block 51 is movably connected to the pendulum body 2. The mounting block 51 can move horizontally under the action of an external force, thereby achieving a coarse adjustment of the counterweight's center of gravity. It should be noted that, to prevent the mounting block 51 from accidentally sliding out of the pendulum body 2 during the calibration process, and to ensure the accuracy of the calibration and the smooth, unobstructed movement of the counterweight block 54, the frictional resistance between the mounting block 51 and the pendulum body 2 needs to be greater than the frictional resistance between the mounting block 51 and the counterweight block 54. Specifically, in this embodiment, the mounting block 51 and the pendulum body 2 can be an interference fit, while the counterweight block 54 and the mounting block 51 can be a clearance fit or a small interference fit.

[0065] To prevent the transmission component 53 from causing the counterweight 54 to rotate when the motor 52 rotates, refer to... Figures 7-8 As shown, in this embodiment, the mounting block 51 is provided with a guide groove 513, which is axially arranged along the mounting hole 510 and disposed on the hole wall of the mounting hole 510. The counterweight block 54 is provided with a guide protrusion 542 that cooperates with the guide groove 513. When the transmission member 53 rotates, the frictional resistance between the transmission member 53 and the counterweight block 54 is transmitted to the counterweight block 54. When the guide protrusion 542 extends into the guide groove 513 to cooperate with each other, the counterweight block 54 can be prevented from rotating in the mounting hole 510. Of course, this application is not limited to this. In other embodiments, the mounting block 51 is provided with a guide protrusion 542, and the counterweight block 54 is provided with a guide groove 513 that cooperates with the guide protrusion 542, which also falls within the protection scope of this application, and this is something that those skilled in the art can understand and accept.

[0066] Specifically, refer to Figure 8As shown, the counterweight 54 in this embodiment may include a main body 541 and a guide protrusion 542 disposed on the main body 541. For structural stability and reliability, two guide protrusions 542 are provided in this embodiment and are disposed opposite to each other on both sides of the main body 541. The outer wall of the main body 541 abuts against the wall of the mounting hole 510, a portion of the outer wall of the guide protrusion 542 abuts against the wall of the guide groove 513, and the other portion of the outer wall of the guide protrusion 542 is separate from the wall of the guide groove 513. The outer wall of the guide protrusion 542 may include two oppositely disposed guide surfaces 5421 and a clearance surface 5422 connecting the two guide surfaces 5421. By abutting the two guide surfaces 5421 and the groove wall of the guide groove 513, and separating the clearance surface 5422 from the groove wall of the guide groove 513 to form a gap between them, the counterweight 54 is prevented from rotating circumferentially within the mounting block 51. Simultaneously, the separation of the clearance surface 5422 from the groove wall of the guide groove 513 reduces the contact area between the guide protrusion 542 and the guide groove 513, thereby reducing the contact area between the counterweight 54 and the mounting block 51 and decreasing the frictional resistance between them. Of course, this application is not limited to this; in other embodiments, one, three, or four guide protrusions 542 may be provided, which is understandable and acceptable to those skilled in the art.

[0067] Specifically, in this embodiment, the mounting block 51 includes a mounting portion 511 and a limiting portion 512 disposed in the pendulum body 2. For ease of handling during coarse adjustment, the outer diameter of the limiting portion 512 is larger than the outer diameter of the mounting portion 511. The pendulum body 2 has a through hole, in which the mounting portion 511 is installed. The outer diameter of the mounting portion 511 is smaller than the diameter of the through hole, and the diameter of the through hole is smaller than the outer diameter of the limiting portion 512. In this embodiment, the mounting hole 510 penetrates both the mounting portion 511 and the limiting portion 512. The motor 52 is mounted in the mounting portion 511, and its output shaft 521 is approximately aligned with the central axis of the mounting block 51. When the motor 52 drives the transmission component 53 to rotate, and the transmission component 53 drives the counterweight 54 to rotate, thereby causing the counterweight 54 to slide within the mounting block 51, the position of the counterweight 54 within the mounting block 51 can be changed, thus calibrating the projector 100.

[0068] Preferably, the evaluation device 73 in this embodiment includes an image recognition device and a controller. The image recognition device is used to acquire the laser spot image projected onto the target 74 by the optical path extension device 72. Based on the laser spot images projected onto the target 74 by the line projector 100 before and after rotating a first angle, the deviation distance is calculated, and the deviation distance is used to determine whether the line projector 100 needs to be calibrated. When the image recognition device in this embodiment determines that calibration is required, the controller generates a calibration control command based on the deviation distance and sends the calibration control command to the wireless communication module of the line projector 100 so that the control module of the line projector can perform automatic calibration. That is, the control module can control the motor 52 to rotate and drive the counterweight 54 to move horizontally within the mounting block 51 to calibrate the line projector 100 according to the calibration amount.

[0069] Reference Figure 1 As shown, the base 71 in this embodiment may also include an adjustment device 711. The adjustment device 711 may be located, for example, directly below the projector 100 or inside the base 71, for adjusting the base 71 to rotate by a certain angle or raise by a certain height. Specifically, the adjustment device 711 is configured to drive the projector 100 to rotate around its own central axis by a first angle in response to an adjustment control command from the evaluation device (i.e., the controller). This allows for more precise control of the rotation angle of the projector 100. The first angle may be one of 180 degrees, 90 degrees, or 270 degrees. It should be understood by those skilled in the art that these three angles are merely exemplary and not limiting; they are simply convenient for calculating calibration parameters. Other angles can also achieve the calibration purpose, and therefore, technical solutions with other angles are also included within the scope of the technical solutions claimed in the independent claims of this disclosure. Additionally, it should be noted that the adjustment device can also be configured to drive the projector 100 to slide vertically in response to an adjustment control command from the evaluation device (i.e., the controller) to adjust the height of the projector 100, which is understandable and acceptable to those skilled in the art.

[0070] It should be noted that the motor 52 in this application can be a DC motor 52, an AC asynchronous motor 52, an AC synchronous motor 52, or other rotary drive structures with rotary drive function. The structures and working principles of the motor 52, optical path extension device 72, evaluation device 73, etc., which are not described in detail in this application, can all adopt existing solutions in the prior art, which can be understood and accepted by those skilled in the art, and therefore will not be elaborated further.

[0071] In summary, this disclosure uses the following method to calibrate the line projector 100:

[0072] Step 1: Preparation: Place the laser beam projector 100 on the base 71, and fix the evaluation device 73 (such as a mobile phone, tablet, or smart camera) in the third position, ensuring that its camera can clearly capture the entire target panel 74. Simultaneously, ensure that the interior of the calibration device remains relatively dark to guarantee that the evaluation device 73 can clearly capture the laser beam.

[0073] Step 2, Initial position measurement: Rotate the projector 100 to the initial position (e.g., 0°). This position serves as the reference for subsequent calculation of the rotation angle. The laser spot image projected by the projector 100 onto the target 74 is processed by the evaluation device 73 and its internal image recognition system, such as the OpenCV library, to obtain the center pixel coordinates (m, n) of the laser spot image at the initial position.

[0074] Step 3: Position measurement after rotation: The projector 100 is precisely rotated by a first angle (e.g., 180°) using the adjustment device 711. The laser spot image projected by the projector 100 onto the target 74 after rotation is processed by the evaluation device 73 and its internal image recognition system, such as the OpenCV library, to obtain the center pixel coordinates (m', n') of the laser spot image at the initial position.

[0075] Step 4: Calculation and Judgment: By comparing the height difference ∆H between n and n', if ∆H is within the allowable error range, the horizontal accuracy of the projector is deemed qualified and no calibration is required; if ∆H exceeds the allowable error range, calibration is required.

[0076] Step 5: Perform calibration: The evaluation device 73 calculates the calibration amount based on the measured height difference ∆H, generates a calibration control command, and sends the calibration control command to the wireless communication module. The control module controls the motor 52 to rotate in the corresponding direction and number of revolutions based on the calibration control command received via the wireless communication module, thereby adjusting the position of the counterweight 54 to adjust the pendulum 2.

[0077] Step 6: Determine if secondary calibration is needed: Repeat steps 2 to 4. If ∆H' is within the allowable error range, the horizontal accuracy of the projector is deemed qualified and no calibration is required; if ∆H' exceeds the allowable error range, secondary calibration is required.

[0078] In the description of the embodiments of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0079] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0080] In the description of the embodiments of the present invention, it should also be noted that the terms "first," "second," etc., used herein do not specifically refer to any order or sequence, nor are they intended to limit the present case; they are merely used to distinguish components or operations described using the same technical terms.

[0081] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0082] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A line projector, characterized in that, The line projector includes: shell; The pendulum body is installed in the outer casing; At least one vertical laser module is fixedly connected to the pendulum body for emitting vertical lasers; A horizontal laser module is fixedly connected to the pendulum body and is used to emit horizontal lasers; An automatic leveling device is installed in the pendulum body to adjust the balance of the pendulum body. The automatic leveling device includes a motor, a mounting block, and a counterweight block located inside the mounting block and installed in conjunction with the motor. The rotation of the motor drives the counterweight block to move horizontally within the mounting block.

2. The line projector according to claim 1, characterized in that, The mounting block is positioned opposite to the vertical laser module. The mounting block has mounting holes, the motor is fixedly mounted in the mounting holes, and the counterweight is slidably mounted in the mounting holes. The automatic leveling device also includes a transmission component. One end of the transmission component is connected to the output shaft of the motor, and the other end is connected to the counterweight. The rotation of the motor drives the counterweight to move horizontally within the mounting block via gears.

3. The line projector according to claim 1, characterized in that, The mounting block is movably connected to the pendulum body, and the mounting block can move horizontally under the action of external force.

4. The line projector according to claim 1, characterized in that, The housing also includes a power module and a control module. The power module is electrically connected to the vertical laser module, the horizontal laser module, the control module, and the motor. The control module is used to control the motor's operation.

5. The line projector according to claim 4, characterized in that, A calibration switch is provided on the housing, and the control module receives the trigger command from the calibration switch to control the motor to operate.

6. The line projector according to claim 4, characterized in that, The housing also includes a wireless communication module configured to establish a communication connection with an external terminal device to receive calibration control commands from the terminal device. The control module receives the calibration control commands to control the motor's operation.

7. The line projector according to claim 3, characterized in that, The mounting block includes a mounting portion and a limiting portion disposed in the pendulum body, wherein the outer diameter of the limiting portion is larger than the outer diameter of the mounting portion.

8. The line projector according to claim 1, characterized in that, One of the mounting block and the counterweight block is provided with a guide groove, and the other is provided with a guide protrusion that cooperates with the guide groove.

9. A calibration device, characterized in that, The calibration device includes a platform and a base, an optical path extension device, an evaluation device, and a target, which are sequentially arranged on the platform. The base is configured for fixing and mounting the line projector as described in any one of claims 1 to 8; The optical path extension device is used to receive the laser emitted by the laser projector and project it onto the target after adjustment by the optical path extension device; The evaluation device is used to acquire the laser spot image projected onto the target by the optical path extension device. Based on the laser spot images projected onto the target by the line projector before and after rotating at the first angle, the deviation distance is calculated. Based on the deviation distance, it is determined whether the line projector needs to be calibrated and the calibration amount. The control module controls the motor to rotate according to the calibration amount, which drives the counterweight block to move horizontally within the mounting block to calibrate the line projector.

10. The calibration apparatus according to claim 9, characterized in that, The evaluation device includes an image recognition device and a controller. When the image recognition device determines that calibration is required, the controller generates a calibration control command based on the deviation distance and sends the calibration control command to the wireless communication module of the line projector so that the control module of the line projector can perform automatic calibration.

11. The calibration apparatus according to claim 9, characterized in that, The base also includes an adjustment device configured to drive the projector to rotate about its own central axis by the first angle in response to an adjustment control command from the evaluation device.

Images