A multi-frame based seat belt detection apparatus

Abstract

The utility model relates to safety belt detection technical field, concretely is a kind of safety belt detection device based on multiple frames, including screw slide, and screw slide is equipped with sliding seat, and sliding seat is equipped with shooting support, and shooting support is equipped with camera, and screw slide drives sliding seat to carry out reciprocating linear motion.The safety belt detection device based on multiple frames, in the detection range and comprehensiveness, device reciprocating linear motion is driven by screw slide sliding seat and related components, 180 ° angle adjustment is realized along arc track by angle adjusting seat driving camera, forms the three-dimensional detection mode of "linear displacement+multi-angle rotation".This mode can comprehensively cover each operating point of high-altitude work area such as scaffold, tower crane, no matter is the operating personnel of different positions in horizontal direction, or the safety rope wearing condition of operating personnel in standing, climbing, stooping and other different postures, can be accurately captured.

Description

Technical Field

[0001] This utility model relates to the field of seat belt detection technology, and more specifically, to a seat belt detection device based on multiple frames. Background Technology

[0002] With the rapid development of society and the economy, high-altitude operations are increasing in factories, construction sites, and other locations, making the safety of workers at heights a growing concern. Safety ropes, as indispensable protective equipment in high-altitude operations, are crucial for ensuring the safety of workers and are an important aspect of standardized project management. However, in reality, accidents caused by falls account for a high proportion, approximately 17% of all work-related accidents, most of which are related to improper use of safety ropes.

[0003] Currently, the supervision of safety ropes for high-altitude operations mainly relies on manual inspections, but this method has obvious limitations. On the one hand, manual supervision is difficult to achieve real-time full coverage, especially in scenarios such as large construction sites or multiple work points operating simultaneously, which can easily lead to blind spots in supervision; on the other hand, human judgment is easily affected by subjective factors, and may result in inaccurate information due to negligence or judgment errors, making it impossible to detect situations where safety ropes are not worn correctly in a timely manner.

[0004] Some existing automated detection devices, such as the infrared camera-based safety belt detection method and device disclosed in Chinese Patent CN 112132040A, have achieved automation to a certain extent, but their applicability in high-altitude work scenarios is insufficient. This device has a fixed detection angle, making it difficult to handle the complex and varied working postures of high-altitude workers (such as climbing, bending, and turning sideways), and it is prone to missed detections due to shooting angle issues. Furthermore, its single-frame detection mechanism has weak anti-interference capabilities, and it is prone to misjudgments when workers' limbs swing or tools obstruct the view, thus failing to meet the high safety requirements of high-altitude operations.

[0005] Therefore, given the unique characteristics of high-altitude work scenarios, developing a safety rope detection device that can achieve all-round, high-precision, and interference-resistant operation is of great practical significance for timely detection of safety hazards, reduction of fall accidents, protection of workers' lives, and promotion of standardized safety management in engineering projects. Utility Model Content

[0006] The purpose of this invention is to provide a multi-frame-based safety belt detection device to address the insufficient applicability in high-altitude work scenarios mentioned in the background art. This device has a fixed detection angle, making it difficult to handle the complex and varied working postures of high-altitude workers (such as climbing, bending over, and turning sideways), and is prone to missed detections due to shooting angle issues.

[0007] To achieve the above objectives, this utility model provides a seat belt detection device based on multiple frames, including a lead screw slide, a sliding seat mounted on the lead screw slide, a shooting bracket mounted on the sliding seat, and a camera mounted on the shooting bracket. The lead screw slide drives the sliding seat to perform reciprocating linear motion, and the camera moves along an arc track on the shooting bracket through an angle adjustment seat, thereby realizing the change of shooting angle.

[0008] This setup uses a lead screw slide to drive the sliding seat and camera to reciprocate linearly, while the camera moves on the curved track of the shooting bracket with the help of an angle adjustment seat to change the shooting angle.

[0009] Preferably, the angle adjustment seat includes a housing, a drive wheel is installed on the inner side of the housing, the axis of the drive wheel is rotatably connected to the inner wall of the housing via a rotating shaft, a drive motor is installed on the outer wall of the housing, and the rotating shaft is driven to rotate by the drive motor to achieve rolling on the arc track.

[0010] Inside the housing of this angle adjustment mount, a drive motor drives a drive wheel to rotate via a shaft, causing the drive wheel to roll on an arc-shaped track, thereby changing the angle of the camera.

[0011] Preferably, the arc-shaped track is provided with a guide groove near the drive wheel, and the upper part of the drive wheel rolls along the guide groove.

[0012] This feature involves a guide groove on an arc-shaped track that engages with the upper part of the drive wheel, allowing the drive wheel to roll along the guide groove.

[0013] Preferably, the lower inner wall of the housing is provided with a positioning groove, which cooperates with the lower surface of the drive wheel.

[0014] This feature involves a positioning groove on the lower inner wall of the housing that mates with the lower surface of the drive wheel.

[0015] Preferably, a shaft hole is provided on one side of the housing, one end of the rotating shaft passes through the shaft hole and is connected to the output shaft of the drive motor, and the other end of the rotating shaft is rotatably connected to the inner wall of the housing through a bearing.

[0016] This configuration involves one end of the rotating shaft passing through the shaft hole in the housing and connecting to the output shaft of the drive motor, while the other end is rotatably connected to the inner wall of the housing via a bearing.

[0017] Preferably, the arc track has a semi-circular structure, and the camera moves on the arc track to achieve 180° angle adjustment.

[0018] This feature features a semi-circular curved track, allowing the camera to move within it at a 180° angle.

[0019] Preferably, the two ends of the lead screw slide are horizontally fixed by mounting brackets.

[0020] This setting involves horizontally mounting and fixing the lead screw slide at both ends using mounting brackets.

[0021] Preferably, the camera is equipped with a multi-frame detection module, which detects and analyzes multiple frames of photos. When the results of multiple frames show that the seat belt cannot be detected, an external alarm is triggered.

[0022] This setting uses a multi-frame detection module within the camera to capture and analyze multiple frames of photos. When no seatbelt is detected in any of the frames, it controls an external alarm to sound.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] This multi-frame-based safety belt detection device, in terms of detection range and comprehensiveness, utilizes a screw slide to drive the reciprocating linear motion of the sliding seat and related components. Combined with an angle adjustment seat that allows the camera to adjust its angle 180° along an arc-shaped track, this forms a three-dimensional detection mode of "linear displacement + multi-angle rotation." This mode can comprehensively cover all work points in high-altitude work areas such as scaffolding and tower cranes. Whether it's workers in different horizontal positions or in different postures such as standing, climbing, or bending over, the device can accurately capture the safety rope wearing status. This effectively solves the problem of blind spots in traditional fixed-position detection devices, significantly reduces the missed detection rate, and ensures comprehensive monitoring of the safety rope wearing status of workers at heights.

[0025] The camera's built-in multi-frame detection module plays a crucial role in ensuring detection accuracy and reliability. This module analyzes multiple frames of images, triggering an external alarm only when no safety rope is detected in any of the frames. This mechanism successfully filters out false alarms caused by momentary events such as worker limb movements or tool obstructions, significantly improving the accuracy and reliability of the detection results. This allows managers to promptly and accurately monitor the safety rope wearing status of workers at height, providing strong support for ensuring worker safety.

[0026] The precision design of each component is crucial to the stability of the device's operation. In the angle adjustment unit, the drive wheel, driven by the drive motor and rotating shaft, rolls along the guide groove of the arc-shaped track. Simultaneously, the positioning groove on the lower inner wall of the outer casing engages with the lower surface of the drive wheel, forming a double-limiting structure. This structure effectively prevents the drive wheel from deviating from the track or wobbling during rolling, ensuring the smoothness and accuracy of the angle adjustment process. Furthermore, the connection between the rotating shaft and the outer casing reduces friction and jamming during rotation, ensuring efficient power transmission and smooth camera angle adjustment. This prevents transmission problems from affecting the timeliness of detection and guarantees stable operation of the device in complex environments such as high-altitude vibrations.

[0027] In terms of adaptability and practicality, the lead screw slide table achieves horizontal installation and fixation via a mounting base, allowing for stable installation in various positions such as supports for high-altitude operations and tower crane beams, adapting to the installation requirements of different high-altitude work scenarios. This design not only ensures the stability of the lead screw slide table when driving the sliding seat, avoiding the impact of shaking caused by insecure installation on shooting quality, but also facilitates the installation and fixation of the device, improving its applicability in different high-altitude work environments and reducing the difficulty of installation and operating costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the shooting bracket in this utility model;

[0030] Figure 3 This is a schematic diagram of the angle adjustment seat in this utility model;

[0031] Figure 4 This is a schematic diagram of the outer shell structure in this utility model;

[0032] Figure 5 This is a schematic diagram of the arc-shaped track in this utility model;

[0033] The meanings of the labels in the diagram are as follows:

[0034] 1. Lead screw slide; 11. Mounting base; 2. Sliding base; 3. Shooting bracket; 31. Arc track; 311. Guide groove; 4. Camera; 5. Angle adjustment base; 51. Housing; 511. Positioning groove; 512. Shaft hole; 52. Drive wheel; 53. Rotating shaft; 54. Drive motor. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] This invention provides a seatbelt detection device based on multiple frames, such as... Figure 1 As shown, the system includes a lead screw slide 1, a sliding seat 2 mounted on the lead screw slide 1, a shooting bracket 3 mounted on the sliding seat 2, and a camera 4 mounted on the shooting bracket 3. The lead screw slide 1 drives the sliding seat 2 to perform reciprocating linear motion. The camera 4 moves along an arc-shaped track 31 on the shooting bracket 3 via an angle adjustment seat 5, thereby achieving changes in the shooting angle. The lead screw slide 1 includes a lead screw component, which is driven to rotate by a lead screw motor, causing the lead screw slider to move linearly, which in turn moves the sliding seat 2.

[0037] The lead screw slide 1 drives the sliding seat 2, the shooting bracket 3, and the camera 4 to perform reciprocating linear motion. Simultaneously, the camera 4 moves along the arc-shaped track 31 of the shooting bracket 3 with the aid of the angle adjustment seat 5, thereby changing the shooting angle. In high-altitude work scenarios, this design allows the camera 4 to cover different work locations such as scaffolding and tower cranes, capturing the safety rope status of workers in different postures, such as standing or climbing, whether at different horizontal work points. This significantly expands the detection range, ensuring comprehensive monitoring of multiple workers within the high-altitude work area and preventing the omission of safety rope wearing at certain work points or in different postures due to fixed-position shooting.

[0038] In this embodiment, as Figure 2 As shown, the angle adjustment seat 5 includes a housing 51, a drive wheel 52 is installed on the inner side of the housing 51, the axis of the drive wheel 52 is rotatably connected to the inner wall of the housing 51 through a rotating shaft 53, and a drive motor 54 is installed on the outer wall of the housing 51. The rotating shaft 53 is driven to rotate by the drive motor 54 to achieve rolling on the arc track 31.

[0039] Inside the housing 51 of the angle adjustment seat 5, the drive motor 54 drives the drive wheel 52 to rotate via the rotating shaft 53, causing the drive wheel 52 to roll on the arc-shaped track 31, thereby changing the angle of the camera 4. During high-altitude operations, the angle of the camera 4 can be adjusted promptly according to the movement and posture changes of the worker. This provides stable power for the angle adjustment of the camera 4, ensuring smooth rotation of the drive wheel 52 and precise control of the camera 4's angle. This guarantees clear imaging of the details of the worker's safety rope attire even in complex high-altitude environments, improving the reliability and accuracy of angle adjustment and ensuring that angle issues do not affect the detection of the safety rope.

[0040] Specifically, such as Figure 4 As shown, the arc-shaped track 31 is provided with a guide groove 311 near the drive wheel 52, and the upper part of the drive wheel 52 rolls along the guide groove 311.

[0041] The guide groove 311 of the arc-shaped track 31 engages with the upper part of the drive wheel 52, allowing the drive wheel 52 to roll along the guide groove 311. In the vibration environment common in high-altitude operations, this guide groove helps to guide the rolling of the drive wheel 52. This prevents the drive wheel 52 from deviating from the track during rolling, ensuring the stability and accuracy of the angle adjustment seat 5's movement, reducing shooting angle errors caused by factors such as high-altitude vibration, and ensuring that the camera 4 is always pointed at the critical part of the worker's safety rope.

[0042] Furthermore, such as Figure 3 As shown, a positioning groove 511 is provided on the lower inner wall of the outer casing 51, and the positioning groove 511 cooperates with the lower surface of the drive wheel 52.

[0043] The positioning groove 511 on the lower inner wall of the outer casing 51 mates with the lower surface of the drive wheel 52. This further limits the movement of the drive wheel 52 in the swaying environment of high-altitude operations. The effect is to enhance the stability of the drive wheel 52 during rolling, preventing it from wobbling up and down during vibrations and swaying in high-altitude operations, making the angle adjustment process smoother, improving the overall robustness of the angle adjustment seat 5 structure in high-altitude environments, and ensuring the stability of the camera 4's shooting.

[0044] Furthermore, such as Figure 3 As shown, a shaft hole 512 is provided on one side of the housing 51. One end of the rotating shaft 53 passes through the shaft hole 512 and is connected to the output shaft of the drive motor 54. The other end of the rotating shaft 53 is rotatably connected to the inner wall of the housing 51 through a bearing.

[0045] One end of the rotating shaft 53 passes through the shaft hole 512 of the housing 51 and is connected to the output shaft of the drive motor 54, while the other end is rotatably connected to the inner wall of the housing 51 via a bearing. This connection method allows the rotating shaft 53 to rotate flexibly under the drive of the drive motor 54. In high-altitude working environments, this reduces friction and jamming during the rotation of the rotating shaft 53. The effect is to ensure the flexibility and stability of the rotating shaft 53, improve transmission efficiency, and enable the power of the drive motor 54 to be efficiently transmitted to the drive wheel 52, ensuring the smoothness of the camera's angle adjustment in high-altitude working scenarios and preventing transmission problems from affecting the timeliness of detection.

[0046] Furthermore, such as Figure 1 As shown, the arc track 31 has a semi-circular structure, and the camera 4 moves on the arc track 31 to achieve 180° angle adjustment.

[0047] The arc-shaped track 31 has a semi-circular structure, and the camera 4 can be adjusted 180° on it. During high-altitude operations, it can capture the safety rope wearing status of workers from all directions. This significantly expands the shooting angle range of the camera 4, clearly capturing the safety rope wearing status regardless of whether the worker is facing forward, to the side, or from other angles, further improving the comprehensiveness and accuracy of detection under complex high-altitude working postures.

[0048] Furthermore, such as Figure 1 As shown, the two ends of the lead screw slide 1 are horizontally fixed by the mounting base 11.

[0049] The lead screw slide 1 is horizontally fixed at both ends by mounting bases 11. This ensures the stability of the lead screw slide 1 at installation locations such as supports and tower crane beams used in high-altitude operations. The effect is to ensure stable installation of the lead screw slide 1 in high-altitude environments, preventing wobbling when driving the sliding seat 2 due to insecure installation, thus ensuring the image quality of the camera 4 during linear movement. It also facilitates installation and fixation of the device in different high-altitude operation scenarios, improving the device's applicability.

[0050] Furthermore, the camera 4 is equipped with a multi-frame detection module, which captures and analyzes multiple frames of photos. When the results of multiple frames show that the seat belt cannot be detected, an external alarm is triggered.

[0051] The multi-frame detection module within camera 4 captures and analyzes multiple frames of images. When no safety rope is detected in any of the frames, it triggers an external alarm. In high-altitude operations, this avoids misjudgments caused by momentary events such as worker limb movements or tool obstructions. The effect is that multi-frame detection filters out transient interference; an alarm is only triggered when multiple detection results are consistent, improving detection accuracy and reliability, reducing the probability of false alarms, and making alarms more reliable. This allows for timely reminders to management to monitor the safety rope wearing status of workers at height, ensuring worker safety.

[0052] When in use, the multi-frame safety belt detection device of this utility model relies on the horizontal linear motion of the screw slide 1 and the 180° rotation of the angle adjustment seat 5 along the arc track 31 to construct a three-dimensional monitoring network that is suitable for high-altitude work areas such as scaffolding, tower cranes, and high-altitude platforms. It can cover key parts of the safety rope, such as waist buckles and shoulder connection points, in various postures of workers, such as standing, climbing, and bending over.

[0053] Anti-interference transmission principle: Through the enhanced power transmission of drive motor 54-rotating shaft 53-drive wheel 52, combined with the sealed limit of guide groove 311 and positioning groove 511, the angle adjustment is kept within ±1° accuracy in the dusty and vibrating environment of the construction site, avoiding recognition deviation caused by mechanical vibration.

[0054] Dynamic verification principle: Based on the multi-frame detection module of camera 4, the "continuous multi-frame feature tracking" logic is used to detect the dynamic movements of high-altitude workers, such as limb swings and tool obstruction. An alarm is triggered only when the safety rope is not detected for 8-12 consecutive frames, which can be adjusted according to the intensity of the work, thus filtering out instantaneous interference.

[0055] Work process

[0056] Scene adaptation and deployment: The device is fixed to the support, tower crane beam and other positions around the high-altitude operation area by the mounting seat 11 of the screw slide table 1. During initialization, the sliding seat 2 drives the shooting bracket 3 to move to the reference position in front of the work surface. The camera 4 is calibrated to the initial angle of the core area of ​​the operator's activity by the angle adjustment seat 5.

[0057] Monitoring range adjustment:

[0058] Horizontal scanning phase: The lead screw slide 1 drives the sliding seat 2 to move back and forth along the horizontal direction of the working surface, covering the working points within different spans of the scaffolding and different slewing radii of the tower crane, ensuring that multiple high-altitude workers are monitored at the same time.

[0059] Angle tracking stage: When the worker moves or changes posture, the drive motor 54 starts, the rotating shaft 53 drives the drive wheel 52 to roll along the guide groove 311 of the arc track 31, the outer shell 51 rotates synchronously with the drive wheel, and the positioning groove 511 fits against the lower part of the drive wheel to resist the vibration of the construction site, so that the camera 4 can complete the 0-180° angle flip, accurately track the position of the safety rope worn by the worker's waist and shoulders, and can clearly capture the image even if the worker bends over or moves to the side.

[0060] Multi-frame recognition and analysis: Camera 4 captures 8-10 frames per second for each worker. The multi-frame detection module focuses on extracting features of the safety rope, such as the metallic reflection of the waist buckle and the fabric texture of the shoulder straps. If no feature is detected in a single frame, it is marked as "transient anomaly". When 10 consecutive frames are "transient anomalies" and non-safety rope factors such as tool obstruction are excluded, it is determined that "the safety rope is not worn properly".

[0061] Real-time early warning trigger: Once "not wearing the safety rope correctly" is detected, the system immediately triggers the site's audible and visual alarms, such as tower crane warning lights and on-site loudspeakers, via wireless signal link. Simultaneously, the warning information is pushed to the management personnel's terminal, achieving a closed-loop response of "detection-early warning-linkage," shortening the response time to within 10 seconds compared to manual supervision. If the safety rope is detected to be worn correctly or if multiple frames show inconsistent results, dynamic tracking and monitoring of the worker continues.

[0062] Continuous monitoring cycle: The lead screw slide 1 and angle adjustment seat 5 move in a cycle according to the monitoring route divided by the work area, and complete a full area scan every 30 seconds. The identification process is automatically started for personnel who enter the work area, until the work is completed or the equipment is powered off, which effectively reduces the risk of fall accidents caused by safety rope wearing problems.

[0063] Finally, it should be noted that the electronic components in the lead screw slide 1 and other components in this embodiment are all general standard parts or parts known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order between each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A seatbelt detection device based on multiple frames, comprising a lead screw slide (1), characterized in that: A sliding seat (2) is installed on the lead screw slide (1), a shooting bracket (3) is installed on the sliding seat (2), and a camera (4) is installed on the shooting bracket (3). The lead screw slide (1) drives the sliding seat (2) to perform reciprocating linear motion. The camera (4) moves along the arc track (31) on the shooting bracket (3) through the angle adjustment seat (5), thereby realizing the change of shooting angle.

2. The seatbelt detection device based on multiple frames according to claim 1, characterized in that: The angle adjustment seat (5) includes a housing (51), and a drive wheel (52) is installed on the inner side of the housing (51). The axis of the drive wheel (52) is rotatably connected to the inner wall of the housing (51) through a rotating shaft (53). A drive motor (54) is installed on the outer wall of the housing (51). The rotating shaft (53) is driven to rotate by the drive motor (54) to achieve rolling on the arc track (31).

3. The seatbelt detection device based on multiple frames according to claim 2, characterized in that: The arc-shaped track (31) is provided with a guide groove (311) near the drive wheel (52), and the upper part of the drive wheel (52) rolls along the guide groove (311).

4. The seatbelt detection device based on multiple frames according to claim 2, characterized in that: The lower inner wall of the outer shell (51) is provided with a positioning groove (511), which cooperates with the lower surface of the drive wheel (52).

5. The seatbelt detection device based on multiple frames according to claim 2, characterized in that: A shaft hole (512) is provided on one side of the outer casing (51). One end of the rotating shaft (53) passes through the shaft hole (512) and is connected to the output shaft of the drive motor (54). The other end of the rotating shaft (53) is rotatably connected to the inner wall of the outer casing (51) through a bearing.

6. The seatbelt detection device based on multiple frames according to claim 1, characterized in that: The arc track (31) has a semi-circular structure, and the camera (4) moves on the arc track (31) to achieve 180° angle adjustment.

7. The seatbelt detection device based on multiple frames according to claim 1, characterized in that: The two ends of the lead screw slide (1) are horizontally fixed by mounting bases (11).

8. The seatbelt detection device based on multiple frames according to claim 1, characterized in that: The camera (4) is equipped with a multi-frame detection module. It performs detection and analysis by capturing multiple frames of photos. When the results of multiple frames are all that the seat belt cannot be detected, it will trigger an alarm by controlling an external alarm device.

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