Multifunctional directional broadcast alarm device for high-altitude operation
By controlling the directional broadcasting device with lidar and a rotating mechanism, the problems of noise pollution and inaccurate propagation in high-altitude operations have been solved, achieving accurate sound propagation and noise reduction, thus improving the safety and health protection of high-altitude operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-03
AI Technical Summary
Existing high-altitude work alarm devices cause serious noise pollution and inaccurate sound propagation, which can easily disturb workers and the environment. Furthermore, the noise propagation of tower cranes affects workers, and existing technologies cannot effectively solve the problem of inaccurate sound wave propagation. The sound diffusion of high-volume loudspeakers in existing technologies leads to noise pollution and inaccurate propagation, affecting the health and safety of workers.
The device uses lidar to scan and identify moving objects below, and controls the directional propagation of sound through directional broadcasting, longitudinal and horizontal rotation mechanisms. Combined with sound-blocking plates to reduce noise diffusion, the device uses guide rail components and traction components to achieve synchronous movement, ensuring accurate sound delivery.
It achieves precise sound transmission, reduces noise pollution, and improves the safety of high-altitude operations and the health protection of workers.
Smart Images
Figure CN224082055U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a high-altitude work alarm device, and in particular to a multi-functional directional broadcast alarm device for high-altitude work. Background Technology
[0002] When working at heights, personnel at the bottom of the crane must evacuate to prevent falling objects from injuring them and causing accidents. The current practice involves installing a loudspeaker on the tower crane; when the crane is in operation, the loudspeaker emits a piercing alarm sound downwards to warn and scare people away.
[0003] However, it's important to know that high-volume loudspeakers installed on tower cranes often have high sound intensity to effectively transmit the sound to the ground. This high-voltage sound can frequently disturb the tower crane workers closest to the loudspeakers, and over time, may even lead to hearing damage. Furthermore, the sound from these loudspeakers also spreads in all directions, causing significant environmental pollution.
[0004] Furthermore, it should be noted that the existing loudspeakers are fixed in a certain position on the tower crane. This means that when the horizontal position of the hoisted object changes, the intensity of the alarm sound that personnel below the object can receive is determined by the distance between them and the high-voltage loudspeaker. When the high-voltage loudspeaker is far from the object, the sound intensity emitted by the loudspeaker may not be enough for the personnel below the object to notice. In this case, if a falling object occurs, a safety accident is very likely to occur.
[0005] Therefore, it is essential to design an alarm device that can reduce noise pollution and accurately project sound onto the area below the hoisted object. Utility Model Content
[0006] The purpose of this invention is to provide a multi-functional directional broadcast alarm device for high-altitude operations, so as to improve sound propagation efficiency and reduce noise pollution.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A multi-functional directional broadcast alarm device for high-altitude operations, comprising:
[0009] Targeted broadcasting;
[0010] A lidar, mounted on a directional broadcast system, is used to scan for moving objects below. The lidar is connected to the directional broadcast system via electrical signals.
[0011] A longitudinal rotation mechanism is connected to the upper end of the directional broadcast to drive the directional broadcast to reciprocate in the vertical plane;
[0012] A horizontal rotation mechanism is connected to the upper end of the vertical rotation mechanism to drive the directional broadcast to rotate horizontally.
[0013] Preferably, a sound-damping plate is fixedly connected below the horizontal rotation mechanism.
[0014] Preferably, the horizontal rotation mechanism is provided with a slider at its upper end and also includes a guide rail assembly laid on the tower. The slider is slidably mounted on the guide rail assembly. Pulling components are provided at both ends of the guide rail assembly, and the pulling components are drivenly connected to the slider.
[0015] Preferably, the guide rail assembly includes several guide rails connected end to end. The cross-section of the guide rail is T-shaped. An adjusting block is slidably provided on the guide rail to adjust its position. The adjusting block has a slot extending along the width direction of the guide rail. Two L-shaped lifting plates are inserted into the slot. The two lifting plates are arranged opposite each other to form a U-shaped structure with the adjusting plate. The two lifting plates have mounting holes, and a bolt assembly passes through the mounting holes.
[0016] Preferably, the mounting hole is an oblong hole.
[0017] Preferably, friction ridges are evenly distributed on the contact surface of the hoisting plate.
[0018] Preferably, the traction assembly includes brackets arranged at both ends of the guide rail assembly, a take-up roller is rotatably mounted on the bracket, a traction rope is wound on the take-up tube, and a motor is driven to one end of the take-up roller.
[0019] Compared with existing technologies, the beneficial effects of this utility model are: through the above structure, the area below the work zone is scanned during hoisting, and a directional sound alarm is emitted simultaneously to ensure the safety of the work zone. It should be noted that the alarm sound emitted by this solution is a directional sound, which has the advantages of concentrated sound propagation area and precise alarm location. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is an exploded view of this utility model;
[0022] Figure 3 This is a schematic diagram of the tensioning assembly.
[0023] Reference numerals: 1. Directional broadcast; 2. LiDAR; 3. Longitudinal rotation mechanism; 4. Horizontal rotation mechanism; 5. Sound baffle; 6. Slider; 7. Pull assembly; 71. Take-up roller; 72. Motor; 73. Bracket; 74. Traction rope; 8. Guide rail assembly; 81. Guide rail; 82. Adjusting block; 83. Lifting plate; 831. Friction protrusion; 84. Bolt assembly. Detailed Implementation
[0024] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical 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 this utility model based on the specific circumstances.
[0027] like Figures 1-3 The diagram illustrates a multi-functional directional broadcast alarm device for high-altitude operations, comprising a directional broadcast system 1 capable of emitting highly concentrated and directional sound waves. A lidar 2 is mounted on the directional broadcast system 1, capable of scanning and identifying moving targets (moving targets higher than 1m). The lidar 2 is electrically connected to the directional broadcast system 1; when the lidar scans and identifies a moving target below, it drives the electrically connected directional broadcast system to emit a directional alarm sound downwards.
[0028] It's important to understand that, to reduce the blind spots of the LiDAR 2 and improve the accuracy of the sound propagation of the directional broadcast 1, a vertical rotation mechanism 3 is fixedly connected to the top of the directional broadcast 1. This mechanism consists of a dual-axis rotary cylinder and a set of forks. The forks are fixed to the top of the directional broadcast 1, and the dual-axis rotary cylinder is driven by the forks, causing the directional broadcast 1 to reciprocate back and forth in the vertical plane. The swing amplitude of the dual-axis rotary cylinder is matched to the moving object scanned by the LiDAR, ensuring that the sound direction of the directional broadcast is directly facing the moving object. Above the vertical rotation mechanism 3, a horizontal rotation mechanism 4 is also installed. This mechanism can be a horizontal rotary cylinder or a servo motor. The shaft of the horizontal rotary cylinder or servo motor is connected to the dual-axis rotary cylinder of the vertical rotation mechanism 3, causing the directional broadcast 1 connected to the vertical rotation mechanism to rotate horizontally.
[0029] It's important to know that when the lidar 2 detects a moving object (person or vehicle) below the work area, it sends a drive signal to the directional broadcast system, causing it to emit an alarm sound. It's also important to know that the lidar is electrically connected to a longitudinal rotation mechanism and a horizontal rotation mechanism. When a moving object is detected, these mechanisms rotate at a certain angle, directing the directional broadcast sound towards the moving target.
[0030] It should be noted that, in the above scheme, although the sound emitted by the directional broadcast has a high directional propagation characteristic, there is still some diffusion, especially in the tower crane operator's cab, which is close to the directional broadcast. To reduce noise harm to tower crane workers, a sound-damping plate 5 is fixedly connected below the horizontal rotation mechanism 4. This sound-damping plate blocks the directional broadcast 1 from above, reducing the upward transmission of sound waves.
[0031] It should be noted that, in order to further improve the accuracy of the device in identifying the work area during high-altitude operations, the directional broadcast in this solution can move synchronously with objects moving on the tower crane boom.
[0032] Specifically, a slider 6 is provided at the upper end of the horizontal rotation mechanism 4, and a T-shaped groove is provided on the slider. At the same time, a guide rail assembly 8 is provided on the boom of the tower crane, and the slider 6 is slidably mounted on the guide rail assembly 8. A traction assembly 7 is provided at both ends of the guide rail assembly 8. The traction assembly is connected to the slider 7 to drive the directional broadcast 1 connected to the slider 6 to move horizontally in sync with the moving object on the tower crane.
[0033] It should be noted that in the above scheme, the guide rail assembly 8 includes several guide rails 81 connected end to end. The cross-section of the guide rail is approximately T-shaped, and two adjusting blocks 82 are slidably fitted on the guide rails 81. Meanwhile, as... Figure 2 As shown, a slot is also provided in the upper part of the adjusting block, which extends along the width of the guide rail and remains continuous. Figure 1 As shown, two L-shaped lifting plates 83 are inserted into the slot. These two lifting plates 83 are arranged opposite each other so as to form a U-shaped fork structure with the adjusting block.
[0034] In addition, a mounting hole is provided on the lifting plate 83, into which a bolt assembly 84 is inserted. This bolt assembly secures the two lifting plates to the steel sections of the boom after they are mounted on either side. It's important to understand that the adjustable block 82 can move primarily because there are numerous connecting bolts at the joints of the steel sections on the boom, and their uneven surfaces inevitably affect the stability of the connections. By adjusting the position of the adjustable block, these connecting bolts and areas where the bolt assembly cannot pass can be effectively avoided.
[0035] It's also important to know that, in order to improve compatibility and ensure that the guide rail assembly in this solution can be fixed on various models, the mounting holes on the lifting plate 83 are oblong holes.
[0036] Furthermore, it should be noted that friction ridges 831 are evenly distributed on the contact surface of the lifting plate 83. This friction feature can increase the friction between the lifting plate and each contacting component, and prevent relative sliding between the two lifting plates, the lifting plate and the bolt assembly, and the lifting plate and the adjusting block.
[0037] like Figure 2 , Figure 3 As shown, in this scheme, the traction assembly 7 specifically includes brackets 73 arranged at both ends of the guide rail assembly 8. The brackets 73 can be fixed to both ends of the boom by bolts or welding. It should be noted that both brackets are located at both ends of the laid guide rail. A take-up roller 71 is rotatably mounted on the bracket 73. At least one traction rope 74 is wound on the take-up roller, and the traction rope is fixedly connected to the slider. When the take-up roller rotates, the traction rope pulls the slider to slide on the guide rail. Figure 3 As shown, a motor 72 is coaxially connected to one end of the take-up roller 71. Driven by the motor, the take-up roller can rotate in both directions.
[0038] In addition, it should be noted that the motor in the traction assembly 7 moves synchronously with the translation vehicle on the boom in this solution, so as to ensure that the directional broadcast 1 can move synchronously with the moving translation vehicle.
[0039] Working principle: When high-altitude operations are required, the lidar system is activated simultaneously with the tower crane. The lidar dynamically scans the area below the tower crane. Any moving objects (people, vehicles) will be detected by the lidar. Once the lidar identifies a moving object, it activates a directional alarm to deter workers below.
[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A multi-functional directional broadcast alarm device for high-altitude operations, characterized in that: include Targeted broadcasting (1); A lidar (2) is mounted on a directional broadcast (1) to scan moving objects below, and the lidar (2) is electrically connected to the directional broadcast (1). A longitudinal rotation mechanism (3) is connected to the upper end of the directional broadcast (1) to drive the directional broadcast (1) to swing back and forth in the vertical plane; A horizontal rotation mechanism (4) is connected to the upper end of the longitudinal rotation mechanism (3) to drive the directional broadcast (1) to rotate horizontally.
2. The multi-functional directional broadcast alarm device for high-altitude operations as described in claim 1, characterized in that: A sound-absorbing plate (5) is fixedly connected below the horizontal rotating mechanism (4).
3. The multi-functional directional broadcast alarm device for high-altitude operations as described in claim 2, characterized in that: The horizontal rotation mechanism (4) is provided with a slider (6) at its upper end and also includes a guide rail assembly (8) laid on the gantry. The slider (6) is slidably mounted on the guide rail assembly (8). The guide rail assembly (8) is provided with traction assemblies (7) at both ends. The traction assemblies (7) are driven to connect with the slider (6).
4. A multi-functional directional broadcast alarm device for high-altitude operations as described in claim 3, characterized in that: The guide rail assembly (8) includes several guide rails (81) connected end to end. The cross-section of the guide rail (81) is T-shaped. An adjusting block (82) is slidably provided on the guide rail (81) to adjust its position. The adjusting block (82) has a slot extending along the width direction of the guide rail (81). Two L-shaped lifting plates (83) are inserted into the slot. The two lifting plates (83) are arranged opposite each other to form a U-shaped structure with the adjusting block (82). The two lifting plates (83) have mounting holes. A bolt assembly (84) passes through the mounting holes.
5. A multi-functional directional broadcast alarm device for high-altitude operations as described in claim 4, characterized in that: The mounting hole is an oblong hole.
6. A multi-functional directional broadcast alarm device for high-altitude operations as described in claim 5, characterized in that: The contact surface of the lifting plate (83) is evenly distributed with friction ridges (831).
7. A multi-functional directional broadcast alarm device for high-altitude operations as described in claim 6, characterized in that: The traction assembly (7) includes brackets (73) arranged at both ends of the guide rail assembly (8). A take-up roller (71) is rotatably mounted on the brackets (73). A traction rope (74) is wound on the take-up roller (71). One end of the take-up roller (71) is driven and connected to a motor (72).