Auxiliary safety device system and method for seat belts

Abstract

The application provides an auxiliary safety device for a safety belt and a safety monitoring method thereof, comprising a plurality of first ultrasonic ranging sensors and a plurality of second ultrasonic ranging sensors for respectively performing ranging in a horizontal direction and a vertical direction to obtain horizontal ranging data and vertical ranging data; a gyroscope for detecting pose data; a microcomputer system is used for analyzing the horizontal ranging data, the vertical ranging data and the pose data, performing an evaluation on a use safety state of the safety belt corresponding to the auxiliary safety device, judging whether the safety belt has a risk of 'low hanging and high use', and sending the evaluation result to a monitoring center by using a wireless communication module, so that the monitoring center can timely send an alarm notification to a user of the safety belt, and the user can adjust the use of the safety belt according to the safety alarm notification sent by the monitoring center; the auxiliary safety device is used in cooperation with the safety belt, can adapt to the situation that the position of a person frequently changes in a construction site, timely reminds the person of the risk of 'low hanging and high use' of the safety belt, and improves the safety management reliability of the construction.

Description

Technical Field

[0001] This invention relates to the field of seat belt equipment, and more particularly to auxiliary safety device systems and methods for seat belts. Background Technology

[0002] Construction workers sometimes fail to wear safety harnesses correctly when working at heights. For example, the harness may be suspended low above the ground, but its length exceeds the height of that position (a situation commonly referred to as "low-hanging, high-use"). In the event of a fall, the harness will not fully extend and bear weight, causing the worker to land directly on hard surfaces or obstacles, rendering the harness ineffective in protecting them. While combining video surveillance and AI analysis can identify this "low-hanging, high-use" situation, the complex environment of construction sites makes it impossible to install surveillance cameras on every worker. Furthermore, the large volume of video surveillance data means AI analysis would be time-consuming, leading to video monitoring delays. The installation and maintenance of surveillance cameras also increases hardware costs. Additionally, the frequent changes in work positions necessitate adaptive adjustments to camera placement, further increasing the manpower costs of video surveillance. It is evident that existing methods of using video surveillance and AI analysis cannot conveniently and cost-effectively adapt to changes in the work location of construction workers and monitor the "low-hanging, high-use" use of safety belts anytime and anywhere. They cannot be used in conjunction with safety belts in a synchronized manner, and cannot provide a low-cost and effective method for detecting the risks of "low-hanging, high-use" safety belts and providing timely information on potential risks to construction workers. Summary of the Invention

[0003] The purpose of this invention is to provide an auxiliary safety device for safety belts and its safety monitoring method. The device includes several first ultrasonic ranging sensors and several second ultrasonic ranging sensors that measure distances in the horizontal and vertical directions respectively, obtaining horizontal and vertical ranging data; a gyroscope for detecting posture data; a microcomputer system that analyzes the horizontal, vertical, and posture data to assess the safety status of the safety belt corresponding to the auxiliary safety device, determining whether there is a risk of "low-mounted, high-used" safety belts; and a wireless communication module that sends the assessment results to a monitoring center, facilitating timely alarm notifications to users of the safety belts, allowing them to adjust their usage accordingly. This auxiliary safety device works synchronously with the safety belt, adapting to situations where personnel frequently change locations on construction sites. It eliminates the need for additional video monitoring equipment and AI analysis, reducing monitoring time delays, facilitating on-site use, and providing timely alerts to the risk of "low-mounted, high-used" safety belts, thereby improving the reliability of safety management in construction projects.

[0004] This invention is achieved through the following technical solution:

[0005] An auxiliary safety device system for seat belts includes: a housing,

[0006] The top of the housing is provided with a plurality of first ultrasonic ranging sensors; the first ultrasonic ranging sensors are used to measure distance in the horizontal direction and obtain horizontal ranging data.

[0007] The bottom of the housing is provided with a plurality of second ultrasonic ranging sensors; the second ultrasonic ranging sensors are used to measure distance in the vertical direction and obtain vertical ranging data.

[0008] A gyroscope is also provided at the bottom of the housing; the gyroscope is used to detect the position and pose data of the housing.

[0009] The housing is equipped with a microcomputer system and a wireless communication module. The microcomputer system is connected to the first ultrasonic ranging sensor, the second ultrasonic ranging sensor and the gyroscope. Based on the horizontal ranging data, the vertical ranging data and the pose data, the microcomputer system evaluates the safety status of the seat belt corresponding to the auxiliary safety device and obtains the corresponding evaluation results.

[0010] The wireless communication module is connected to the microcomputer system and is used to send the evaluation results to the monitoring center.

[0011] Optionally, four first ultrasonic ranging sensors are provided on the top of the housing, and the four first ultrasonic ranging sensors are respectively located at the center of the four sides of the top of the housing.

[0012] Two second ultrasonic ranging sensors are provided at the bottom of the housing, and the two second ultrasonic ranging sensors are respectively located at the center of two opposite sides of the bottom of the housing.

[0013] The gyroscope is located at the bottom.

[0014] Optionally, the bottom of the housing is also provided with several counterweights.

[0015] Optionally, the auxiliary safety device is connected to the suspension component via a soft strap with hooks;

[0016] The seat belt is connected to the suspension component via a seat belt hook;

[0017] The seatbelt hook is connected to the auxiliary safety device via a soft connecting strap.

[0018] Safety monitoring methods using auxiliary safety devices for seat belts include:

[0019] Step S1: Based on the pose data detected by the gyroscope, determine whether the shell has an angle with the vertical direction; based on the determination result of whether the shell has an angle with the vertical direction, preprocess the horizontal ranging data and the vertical ranging data.

[0020] Step S2: Based on the horizontal ranging data, obtain the relative distance between the auxiliary safety device and the obstacle located to its side; based on the relative distance, determine whether the auxiliary safety device is interfered with by the obstacle located to its side, and based on the determination result of whether the auxiliary safety device is interfered with, send a corresponding evaluation result notification message to the monitoring center.

[0021] Step S3: When the auxiliary safety device is not interfered with, based on the detection result of the second ultrasonic ranging sensor, it is determined whether the user of the seat belt is in an unknown measurable safety risk state, and based on the determination result of the unknown measurable safety risk state, a corresponding evaluation result notification message is sent to the monitoring center.

[0022] Step S4: When the user of the seat belt is not in an unknown and measurable safety risk state, the relative distance between the safety auxiliary device and the obstacle located below it is obtained based on the vertical distance measurement data; based on the relative distance, it is determined whether the user of the seat belt is in a safe state, and based on the determination result of the safe state, a corresponding evaluation result notification message is sent to the monitoring center.

[0023] Optionally, in step S1, based on the pose data detected by the gyroscope, it is determined whether the housing has an angle with the vertical direction; based on the determination result of whether the housing has an angle with the vertical direction, the horizontal ranging data and the vertical ranging data are preprocessed, including:

[0024] The pose data detected by the gyroscope is analyzed to obtain the relative angle between the bottom normal direction of the shell and the vertical direction; if the relative angle value is equal to zero, it is determined that there is no angle between the shell and the vertical direction; if the relative angle value is not equal to zero, it is determined that there is an angle between the shell and the vertical direction.

[0025] When the shell has an angle with the vertical direction, the horizontal and vertical distance measurement data are corrected and preprocessed based on the relative angle value; when the shell does not have an angle with the vertical direction, the horizontal and vertical distance measurement data are not corrected and preprocessed.

[0026] Optionally, in step S2, based on the horizontal ranging data, the relative distance between the auxiliary safety device and the obstacle located to its side is obtained; based on the relative distance, it is determined whether the auxiliary safety device is interfered with by the obstacle located to its side, and based on the determination result of whether the auxiliary safety device is interfered with, a corresponding evaluation result notification message is sent to the monitoring center, including:

[0027] The horizontal ranging data is analyzed to obtain the relative horizontal distance between the auxiliary safety device and the obstacle located to its side; based on the position information of the ultrasonic transmitting component and the ultrasonic receiving component of the first ultrasonic ranging sensor, the detection blind zone width of the first ultrasonic ranging sensor is determined; if the relative horizontal distance is greater than the detection blind zone width, it is determined that the auxiliary safety device is not interfered with by the obstacle located to its side; otherwise, it is determined that the auxiliary safety device is interfered with by the obstacle located to its side.

[0028] When the auxiliary safety device is not interfered with, it sends a notification message to the monitoring center indicating that the unknown measurable safety risk has been eliminated; when the auxiliary safety device is interfered with, it sends a notification message to the monitoring center indicating the difference between the relative horizontal distance and the detection blind zone width.

[0029] Optionally, in step S3, when the auxiliary safety device is not interfered with, based on the detection result of the second ultrasonic ranging sensor, it is determined whether the user of the seat belt is in an unknown measurable safety risk state, and based on the determination result of the unknown measurable safety risk state, a corresponding assessment result notification message is sent to the monitoring center, including:

[0030] When the auxiliary safety device is not interfered with, the detection result of the second ultrasonic ranging sensor is used to determine whether the second ultrasonic ranging sensor has an incorrect ranging reading; if the second ultrasonic ranging sensor has an incorrect ranging reading, it is determined that the user of the safety belt is in a state of unknown measurable safety risk; if the second ultrasonic ranging sensor has no incorrect ranging reading, it is determined that the user of the safety belt is not in a state of unknown measurable safety risk.

[0031] When the user of the seat belt is in a state of unknown measurable safety risk, a notification message containing the unknown measurable safety risk has not been eliminated is sent to the monitoring center; when the user of the seat belt is not in a state of unknown measurable safety risk, a notification message containing the unknown measurable safety risk has been eliminated is sent to the monitoring center.

[0032] Optionally, in step S4, when the user of the seat belt is not in a state of unknown measurable safety risk, the relative distance between the safety assist device and the obstacle located below it is obtained based on the vertical distance measurement data; based on the relative distance, it is determined whether the user of the seat belt is in a safe state, and based on the determination result of the safe state, a corresponding evaluation result notification message is sent to the monitoring center, including:

[0033] When the user of the seat belt is not in a state of unknown measurable safety risk, the vertical distance measurement data is analyzed to obtain the relative vertical distance between the bottom of the safety auxiliary device and the obstacle located below it; based on the relative vertical distance and the relative vertical distance between the bottom of the auxiliary safety device and its corresponding suspension component, a first total distance value is obtained.

[0034] Based on the length of the seat belt, the length of the corresponding seat belt hook, and the preset body width of the user, a second total distance value is obtained; the first total distance value is compared with the second total distance value. If the first total distance value is greater than the second total distance value, the user of the seat belt is in a safe state; otherwise, the user of the seat belt is determined to be in an unsafe state.

[0035] When the user is in a safe state, a notification message is sent to the monitoring center indicating that the user is currently using the seat belt correctly; when the user is not in a safe state, a notification message is sent to the monitoring center indicating that the user is not using the seat belt correctly.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The auxiliary safety device and its safety monitoring method for safety belts provided in this application include a plurality of first ultrasonic ranging sensors and a plurality of second ultrasonic ranging sensors for measuring distances in the horizontal and vertical directions, respectively, to obtain horizontal and vertical ranging data; a gyroscope for detecting posture data; and a microcomputer system for analyzing the horizontal, vertical, and posture data to assess the safety status of the safety belt corresponding to the auxiliary safety device, determining whether there is a risk of "low-mounted, high-used" safety belts. Furthermore, a wireless communication module is used to send the assessment results to a monitoring center, facilitating timely alarm notifications to safety belt users, allowing them to adjust their safety belt usage accordingly. This auxiliary safety device works synchronously with the safety belt, adapting to situations where personnel frequently change locations on construction sites. It eliminates the need for additional video monitoring equipment and AI analysis, reducing monitoring time delays, facilitating on-site use, and providing timely alerts to the risk of "low-mounted, high-used" safety belts, thereby improving the reliability of safety management in construction projects. Attached Figure Description

[0038] 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 of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0039] Figure 1 This is a schematic diagram illustrating the connection relationship between the auxiliary safety device for seat belts and the seat belt provided by the present invention.

[0040] Figure 2 This is a schematic diagram of the structure of the auxiliary safety device for seat belts provided by the present invention.

[0041] Figure 3 This is a schematic diagram illustrating the working principle of the ultrasonic ranging sensor in the auxiliary safety device for seat belts provided by the present invention.

[0042] Figure 4 This is a flowchart illustrating the auxiliary safety device method for seat belts provided by the present invention.

[0043] Figure 5 This is a schematic diagram of a first use scenario for the safety monitoring method using an auxiliary safety device for seat belts provided by the present invention.

[0044] Figure 6 This is a schematic diagram of a second use scenario for the safety monitoring method using an auxiliary safety device for seat belts provided by the present invention.

[0045] Figure 7 This is a schematic diagram of a third application scenario of the safety monitoring method using an auxiliary safety device for seat belts provided by the present invention.

[0046] Figure 8 This is a schematic diagram of a fourth application scenario of the safety monitoring method using an auxiliary safety device for seat belts provided by the present invention.

[0047] Figure 9 This is a schematic diagram of a fifth application scenario of the safety monitoring method using an auxiliary safety device for seat belts provided by the present invention.

[0048] Figure 10 This is a schematic diagram of a sixth application scenario of the safety monitoring method using an auxiliary safety device for seat belts provided by the present invention.

[0049] Figure 11 This is a schematic diagram of the detection blind zone of the ultrasonic ranging sensor inside the auxiliary safety device for seat belts provided by the present invention.

[0050] Reference numerals: 1. Housing; 2. First ultrasonic ranging sensor; 3. Second ultrasonic ranging sensor; 4. Gyroscope; 5. Microcomputer system; 6. Wireless communication module; 7. Counterweight. Detailed Implementation

[0051] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0052] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0053] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0054] Please see Figure 1-2 As shown, the auxiliary safety device includes a housing 1. A plurality of first ultrasonic ranging sensors 2 are disposed on the top of the housing 1. The first ultrasonic ranging sensors 2 are used to measure distances in the horizontal direction to obtain horizontal distance data. A plurality of second ultrasonic ranging sensors 3 are disposed on the bottom of the housing 1. The second ultrasonic ranging sensors 3 are used to measure distances in the vertical direction to obtain vertical distance data. The first ultrasonic ranging sensors 2 and the second ultrasonic ranging sensors 3 can measure the distance between the auxiliary safety device and external objects in the horizontal and vertical directions, respectively, thus providing reliable data for subsequent judgment of whether the seat belt is "low-mounted and high-used". To ensure accurate ultrasonic ranging by the first ultrasonic ranging sensors 2 and the second ultrasonic ranging sensors 3, the ultrasonic transmitting and receiving components of the first ultrasonic ranging sensors 2 and the second ultrasonic ranging sensors 3 are directly exposed on the outer surface of the housing. This allows the ultrasonic waves emitted by the ultrasonic transmitting components to be transmitted to external objects without loss, while the ultrasonic receiving components can accurately receive the ultrasonic waves reflected back from the external objects. The first ultrasonic ranging sensors 2 and the second ultrasonic ranging sensors 3 can be disposed on the inner surface of the top of the housing 1.

[0055] A gyroscope 4 is also provided at the bottom of the housing 1. The gyroscope 4 is used to detect the pose data of the housing. When the housing 1 is tilted, the gyroscope 4 can detect the corresponding pose tilt angle in three-dimensional space, especially the relative angle between the bottom normal direction of the housing 1 and the vertical direction.

[0056] The top inner surface of the housing 1 is also equipped with a microcomputer system 5 and a wireless communication module 6. The microcomputer system 5 can be, but is not limited to, an embedded development board or a microcontroller. The embedded development board can be, but is not limited to, an Arduino development board or an Arduino Uno development board. Both the embedded development board and the microcontroller have corresponding software programs installed inside for processing the data detected by the first ultrasonic ranging sensor 2, the second ultrasonic ranging sensor 3, and the gyroscope 4. This is a conventional technique in the field and will not be described in detail here. The microcomputer system 5 is connected to the first ultrasonic ranging sensor 2, the second ultrasonic ranging sensor 3, the gyroscope 4, and the wireless communication module 6, respectively. Thus, the microcomputer system 5 can analyze horizontal ranging data, vertical ranging data, and pose data to determine the vertical distance between the auxiliary safety device and a hard obstacle or hard ground. This allows it to assess the safety status of the seat belt corresponding to the auxiliary safety device, such as determining whether the seat belt is in a "low-attached, high-use" situation, and obtaining the corresponding assessment results. The wireless communication module 6 sends the evaluation results to the monitoring center. Upon receiving the evaluation results, the monitoring center can issue warnings to the user of the safety belt, reminding them of the potential risk of "low attachment, high use" of the safety belt. This allows the user to take timely actions such as adjusting the suspension height of the safety belt or lowering their own position to avoid a fall. The wireless communication module 6 can be, but is not limited to, a 5G or Wi-Fi communication module, ensuring a stable and continuous communication connection between the microcomputer system 5 and the monitoring center. The wireless communication module 6 is also externally mounted on the housing 1, ensuring normal wireless communication with the outside world. Furthermore, the auxiliary safety device includes a battery (not shown in the figure), which is connected to the first ultrasonic ranging sensor 2, the second ultrasonic ranging sensor 3, the gyroscope 4, the microcomputer system 5, and the wireless communication module 6, ensuring a stable power supply to all components of the auxiliary safety device. The battery can be, but is not limited to, a lithium battery.

[0057] Optionally, four first ultrasonic ranging sensors 2 are provided on the top of the housing 1, and the four first ultrasonic ranging sensors 2 are respectively located at the center of the four sides of the top of the housing 1. In this way, the first ultrasonic ranging sensors 2 can independently detect the corresponding horizontal ranging data from the four directions of the side of the housing 1. Two second ultrasonic ranging sensors 3 are provided on the bottom of the housing 1, and the two second ultrasonic ranging sensors 3 are respectively located at the center of two opposite sides of the bottom of the housing 1. In this way, the second ultrasonic ranging sensors 3 can detect the corresponding vertical ranging data from the bottom of the housing downwards. The gyroscope 4 can be provided at the bottom, preferably at the center of the inner surface of the bottom, to avoid the auxiliary safety device from tilting due to unbalanced installation of the gyroscope 4 inside the housing 1.

[0058] Several counterweights 7 are also provided on the bottom inner surface of the housing 1. The counterweights 7 play a role in balancing the auxiliary safety device. Preferably, all the counterweights 7 are symmetrically arranged on the bottom surface of the housing 1 with the bottom center as the center of symmetry. This ensures that when the auxiliary safety device is suspended, it is as close to vertical as possible without external influence. This ensures that the first ultrasonic ranging sensor 2, the second ultrasonic ranging sensor 3, and the gyroscope 4 are all in the expected working environment, and avoids adverse effects on the internal sensors due to the safety auxiliary device's own tilt.

[0059] During the use of the auxiliary safety device, the auxiliary safety device is connected to the suspension component via a soft sling with hooks; the safety belt is connected to the suspension component via a safety belt hook; the safety belt hook and the auxiliary installation device are connected via a soft connecting strap. Simultaneously, both the safety belt hook and the soft sling with hooks are connected to the same suspension component (such as a suspension crossbar), ensuring that the suspension height of the safety belt and the auxiliary safety device are basically the same. This allows construction workers and other personnel to simultaneously install and fix the auxiliary installation device in the vicinity of the safety belt while using it, achieving combined use of the safety belt and the auxiliary safety device. The two form a unified hanging unit, improving the ease of use of the auxiliary safety device, facilitating on-site use, and achieving the expected detection and early warning function against the risk of "low-hanging, high-use" safety belts.

[0060] Please see Figure 3 As shown, the first and second ultrasonic ranging sensors have the same structure and ranging principle. From... Figure 3 As shown in (a), the ultrasonic ranging sensor includes an ultrasonic transmitting component (corresponding to the S end) and an ultrasonic receiving component (corresponding to the R end). The ultrasonic transmitting component emits ultrasonic waves that reach the detection position P and are reflected. The resulting ultrasonic echo reaches the ultrasonic receiving component and is received. Thus, the corresponding calculation component inside the ultrasonic ranging sensor can calculate the relative distance to the detection position P based on the time-of-flight ranging method. The ultrasonic waves emitted by the ultrasonic reflecting component and the ultrasonic echo both have an angle α with the vertical direction. In fact, commercially available ultrasonic ranging sensors all have an effective working angle β. When the angle α is greater than β (corresponding to...), the distance between the ultrasonic waves and the detection position P is calculated. Figure 3 In case (a), the ultrasonic reflected echo will not be received by the ultrasonic receiving component. At this time, the ultrasonic ranging sensor cannot perform normal ranging. The ultrasonic ranging sensor will produce a result value that can be regarded as a calibration error (that is, the ultrasonic ranging sensor will have a ranging reading error). This can be used to determine that the ultrasonic ranging sensor cannot perform ranging work normally.

[0061] In addition, ultrasonic ranging sensors have a maximum measurable distance. If the actual distance between the object to be measured and the ultrasonic ranging sensor is greater than the maximum measurable distance, the ultrasonic ranging sensor will not be able to perform ranging work normally.

[0062] Please see Figure 4 Safety monitoring methods using auxiliary safety devices for seat belts include:

[0063] Step S1: Based on the pose data detected by the gyroscope, determine whether the shell has an angle with the vertical direction; based on the determination result of whether the shell has an angle with the vertical direction, preprocess the horizontal ranging data and the vertical ranging data.

[0064] Step S2: Based on the horizontal distance measurement data, obtain the relative distance between the auxiliary safety device and the obstacle located to its side; based on the relative distance, determine whether the auxiliary safety device is interfered with by the obstacle located to its side, and based on the determination result of whether the auxiliary safety device is interfered with, send the corresponding evaluation result notification message to the monitoring center.

[0065] Step S3: When the auxiliary safety device is not interfered with, based on the detection result of the second ultrasonic ranging sensor, it is determined whether the user of the seat belt is in a state of unknown measurable safety risk, and based on the determination result of the unknown measurable safety risk state, a corresponding assessment result notification message is sent to the monitoring center; wherein, the unknown measurable safety risk can be specifically determined by the corresponding Figure 7 or Figure 8 (in fact, not limited to) Figure 7 and Figure 8 The obstacle placement may cause the second ultrasonic ranging sensor to fail to accurately measure the distance and position of obstacles, resulting in unknown safety risks.

[0066] Step S4: When the user of the seat belt is not in an unknown and measurable safety risk state, the relative distance between the safety auxiliary device and the obstacle located below it is obtained based on the vertical distance measurement data; based on the relative distance, it is determined whether the user of the seat belt is in a safe state, and based on the determination result of the safe state, a corresponding assessment result notification message is sent to the monitoring center.

[0067] Preferably, in step S1, based on the pose data detected by the gyroscope, it is determined whether the shell has an angle with the vertical direction; based on the determination result of whether the shell has an angle with the vertical direction, the horizontal ranging data and the vertical ranging data are preprocessed, including:

[0068] The pose data detected by the gyroscope is analyzed to obtain the relative angle between the bottom normal direction of the shell and the vertical direction; if the relative angle is zero, it is determined that there is no angle between the shell and the vertical direction; if the relative angle is not zero, it is determined that there is an angle between the shell and the vertical direction.

[0069] When the shell is at an angle to the vertical direction, the horizontal and vertical distance measurement data are preprocessed and corrected based on the relative angle value. When the shell is not at an angle to the vertical direction, no preprocessing is performed on the horizontal and vertical distance measurement data. This ensures accurate correction of the horizontal and vertical distance measurement data, guaranteeing that they match the actual situation. When the shell is not at an angle to the vertical direction, no preprocessing is required for the horizontal and vertical distance measurement data, as the detected data is already correct.

[0070] Preferably, in step S2, based on horizontal ranging data, the relative distance between the auxiliary safety device and an obstacle located to its side is obtained; based on the relative distance, it is determined whether the auxiliary safety device is interfered with by the obstacle located to its side, and based on the determination result of whether the auxiliary safety device is interfered with, a corresponding evaluation result notification message is sent to the monitoring center, including:

[0071] The horizontal ranging data is analyzed to obtain the relative horizontal distance between the auxiliary safety device and the obstacle located to its side. Based on the position information of the ultrasonic transmitting and receiving components of the first ultrasonic ranging sensor, the detection blind zone width of the first ultrasonic ranging sensor is determined. If the relative horizontal distance is greater than the detection blind zone width, it is determined that the auxiliary safety device is not interfered with by the obstacle located to its side; otherwise, it is determined that the auxiliary safety device is interfered with by the obstacle located to its side.

[0072] When the auxiliary safety device is not interfered with, it sends a notification message to the monitoring center indicating that the unknown measurable safety risk has been eliminated. When the auxiliary safety device is interfered with, it sends a notification message to the monitoring center indicating the difference between the relative horizontal distance and the width of the detection blind zone. This allows the monitoring center to notify and warn the user, reminding them to adjust the hanging and fixing position of the auxiliary safety device accordingly, thereby effectively avoiding interference from the detection blind zone.

[0073] Preferably, in step S3, when the auxiliary safety device is not interfered with, based on the detection result of the second ultrasonic ranging sensor, it is determined whether the user of the seat belt is in an unknown measurable safety risk state, and based on the determination result of the unknown measurable safety risk state, a corresponding assessment result notification message is sent to the monitoring center, including:

[0074] When the auxiliary safety device is not interfered with, the detection result of the second ultrasonic ranging sensor is used to determine whether the second ultrasonic ranging sensor has an incorrect ranging reading; if the second ultrasonic ranging sensor has an incorrect ranging reading, it is determined that the user of the seat belt is in a state of unknown measurable safety risk; if the second ultrasonic ranging sensor does not have an incorrect ranging reading, it is determined that the user of the seat belt is not in a state of unknown measurable safety risk.

[0075] When the user of the seat belt is in a state of unknown measurable safety risk, a notification message containing the unknown measurable safety risk has not been eliminated is sent to the monitoring center; when the user of the seat belt is not in a state of unknown measurable safety risk, a notification message containing the unknown measurable safety risk has been eliminated is sent to the monitoring center.

[0076] Preferably, in step S4, when the user of the seatbelt is not in a state of unknown measurable safety risk, the relative distance between the safety assist device and the obstacle located below it is obtained based on vertical distance measurement data; based on the relative distance, it is determined whether the user of the seatbelt is in a safe state, and based on the determination result of the safe state, a corresponding assessment result notification message is sent to the monitoring center, including:

[0077] When the user of the seat belt is not in a state of unknown measurable safety risk, the vertical distance data is analyzed to obtain the relative vertical distance between the bottom of the safety auxiliary device and the obstacle located below it; based on the relative vertical distance and the relative vertical distance between the bottom of the auxiliary safety device and its corresponding suspension component, the first total distance value is obtained.

[0078] Based on the length of the seat belt, the length of the corresponding seat belt hook, and the preset body width of the user, a second total distance value is obtained. The first total distance value is compared with the second total distance value. If the first total distance value is greater than the second total distance value, the user of the seat belt is in a safe state; otherwise, the user of the seat belt is determined to be in an unsafe state.

[0079] When the user is in a safe state, a notification message is sent to the monitoring center indicating that the user is currently using the seat belt correctly; when the user is not in a safe state, a notification message is sent to the monitoring center indicating that the user is not using the seat belt correctly.

[0080] The aforementioned safety monitoring method using auxiliary safety devices for seat belts actually corresponds to Figure 5-10In the first to sixth usage scenarios, it can accurately identify whether a person is using the seat belt in an unsafe situation of "low attachment and high use" or other unknown measurable safety risks when the auxiliary safety device is in an inclined state and / or there are obstacles on the sides and below the auxiliary safety device. This allows the monitoring center to promptly remind the person and improve the safety of seat belt use.

[0081] Please see Figure 5 In the first usage scenario, the auxiliary safety device is connected to the suspension component via a soft sling with hooks; one end of the safety belt is connected to the suspension component via a safety belt hook, and the other end is strapped to the person; the safety belt hook and the soft sling are connected via a soft connecting strap, and both the safety belt hook and the soft sling with hooks are connected to the same suspension component (such as a suspension crossbar). Figure 5 In this diagram, L0 represents the length of the seatbelt; L1 represents the length of the seatbelt itself after being suspended by the hook; L2 represents the height of the person lying on their side (corresponding to the person's body width). In actual calculations, L2 can be appropriately increased based on the person's body width. When a person falls, the maximum suspended distance L between them and the suspension component is L = L0 + L1 + L2, which can be considered equivalent to the corresponding safe height value Hsafe. Additionally, L3 represents the sum of the heights of the auxiliary safety device and the soft strap after it is suspended from the suspension component via the hook; Lx represents the distance detected by the auxiliary safety device between itself and a hard surface or obstacle. Thus, the distance between the point of force application (corresponding to the hook) of the soft strap suspended from the suspension component and the ground is L* = L3 + Lx.

[0082] Returning to the first usage scenario, if L*>Hsafe, then when a person falls, they can be suspended in the air by the seat belt, and the seat belt provides safety protection. In this case, the auxiliary safety device will determine that the person is in a safe state (i.e., the seat belt is not "low-hanging and high-using"). If L*≤Hsafe, then when a person falls, they will fall directly onto a hard surface, and the seat belt will not provide safety protection. In this case, the auxiliary safety device will determine that the person is not in a safe state.

[0083] Please see Figure 6 In the second usage scenario, the auxiliary safety device is normally suspended on the suspension component. At this time, there are other hard obstacles at a height H above the hard ground, which also pose a safety hazard to personnel. Similarly, from... Figure 6As can be seen from the parameter relationships, if L*>Hsafe, then when a person falls, they can be suspended in the air by the safety belt and will not collide with hard obstacles. The safety belt plays a role in protecting the person's safety, and the auxiliary safety device will determine that the person is in a safe state (i.e., the safety belt is not "low-hanging and high-using"). If L*≤Hsafe, then when a person falls, they will fall directly onto a hard obstacle, and the safety belt will not play a role in protecting the person's safety. In this case, the auxiliary safety device will determine that the person is not in a safe state.

[0084] Please see Figure 7 In the third usage scenario, the auxiliary safety device is normally suspended on the suspension component. At this time, a hard obstacle exists on the hard surface. This obstacle has an angled structure (i.e., it is a sharp obstacle with a beveled surface). Due to the angled structure, when the tilt angle of this structure is greater than twice the effective working angle β of the ultrasonic ranging sensor, the ultrasonic reflected echo cannot be received by the ultrasonic receiving component of the ultrasonic ranging sensor. This causes the ultrasonic ranging sensor to fail to measure distance normally, resulting in a calibration error value (corresponding to a situation where the ultrasonic ranging sensor has an incorrect distance reading). In other words, it cannot detect the relative distance to the hard obstacle, thus failing to determine if the seatbelt is being used at a lower position than its intended location. The auxiliary safety device then determines that the occupant is in a state of unknown measurable safety risk. Therefore, the auxiliary safety device is equipped with multiple second ultrasonic ranging sensors to perform multi-point distance measurement using different second ultrasonic ranging sensors, thereby reducing the probability of the aforementioned failure to measure distance normally.

[0085] Please see Figure 8 In the fourth usage scenario, which is a special case of the third usage scenario, the auxiliary safety device is normally suspended on the suspension component. At this time, there are multiple hard obstacles with angled structures on the hard surface. The ultrasonic waves emitted by the second ultrasonic ranging sensor are reflected multiple times by the multiple hard obstacles and form ultrasonic reflected echoes. These ultrasonic reflected echoes are received by the second ultrasonic ranging sensor, which can calculate the corresponding distance. However, this distance result cannot accurately reflect the relative distance between all hard obstacles and the auxiliary safety device. Directly relying on this distance result can easily lead to misjudgment, making it impossible to determine whether the seat belt is currently "low-hanging and high-using". At this time, the auxiliary safety device will judge that the person is in an unknown measurable safety risk state.

[0086] Please see Figure 9In the fifth usage scenario, the auxiliary safety device is normally suspended from the suspension component. At this time, there is an obstacle with a small cross-section when viewed from above, and this obstacle is tilted upwards. Actual testing revealed that within the maximum measurable distance range of the ultrasonic ranging sensor, obstacles with small cross-sections cannot effectively reflect the ultrasonic waves emitted by the sensor, meaning they cannot form effective ultrasonic echoes. Therefore, the relative distance between the obstacle and the sensor cannot be properly detected. In this case, the ultrasonic waves emitted by the sensor diffract through obstacle B and directly reach the hard ground, where they are reflected to form ultrasonic echoes. The relative distance detected by the ultrasonic ranging sensor in this situation is the relative distance between the auxiliary safety device and the hard ground. Relying directly on this relative distance can easily lead to misjudgments. Therefore, the vertical ranging data generated by each of the second ultrasonic ranging sensors is analyzed to obtain the cross-sectional width of obstacles located below the auxiliary safety device. This cross-sectional width is compared with a preset cross-sectional width threshold (usually 2 cm). If the cross-sectional width is greater than the preset threshold, it is determined that the obstacle located below will not cause the auxiliary safety device to misidentify the obstacle; otherwise, it is determined that the obstacle located below will cause the auxiliary safety device to misidentify the obstacle. When the obstacle located below will not cause the auxiliary safety device to misidentify the obstacle, a notification message indicating that the unknown measurable safety risk has been eliminated is sent to the monitoring center; when the obstacle located below will cause the auxiliary safety device to misidentify the obstacle, a notification message indicating that the unknown measurable safety risk has not been eliminated is sent to the monitoring center.

[0087] Please see Figure 10 In the sixth usage scenario, the auxiliary safety device is normally suspended on the suspension component. An obstacle C of a certain width, LW2, exists on the side of the auxiliary safety device. The ultrasonic waves emitted by the second ultrasonic ranging sensor are blocked and reflected by obstacle C. The resulting ultrasonic echo is received by the second ultrasonic ranging sensor, generating a ranging result Lx. However, there is still an unknown distance between obstacle C and the ground. Directly relying on this distance result Lx could easily lead to misjudgment. Analysis shows that the above situation occurs because the effective working angle β of the ultrasonic ranging sensor itself is the cause. This effective working angle β results in a detection blind zone for the ultrasonic ranging sensor. The width of this blind zone is related to the relative distance between the ultrasonic transmitting and receiving components of the first ultrasonic ranging sensor. As... Figure 11As shown, details are omitted here. Specifically, based on the position information of the ultrasonic transmitting and receiving components of the first ultrasonic ranging sensor, the detection blind zone width of the first ultrasonic ranging sensor is determined. If the relative horizontal distance is greater than the detection blind zone width, it is determined that the auxiliary safety device is not interfered with by obstacles located to its side; otherwise, it is determined that the auxiliary safety device is interfered with by obstacles located to its side. When the auxiliary safety device is not interfered with, a notification message containing the elimination of unknown measurable safety risks is sent to the monitoring center; when the auxiliary safety device is interfered with, a notification message containing the difference between the relative horizontal distance and the detection blind zone width is sent to the monitoring center.

[0088] Furthermore, while the auxiliary safety device is normally suspended from the suspension components, if it is compressed by other objects, it will tilt, meaning there will be an angle between the bottom normal direction of the auxiliary safety device's housing and the vertical direction. This angle will affect the accuracy of the auxiliary safety device's distance measurement results, thus interfering with the subsequent judgment of the seat belt's "low attachment, high use" situation. Therefore, the pose data detected by the gyroscope is analyzed to obtain the relative angle value between the bottom normal direction of the housing and the vertical direction. If the relative angle value is zero, it is determined that there is no angle between the housing and the vertical direction; if the relative angle value is not zero, it is determined that there is an angle between the housing and the vertical direction. When there is an angle between the housing and the vertical direction, the horizontal and vertical distance measurement data are corrected and preprocessed based on the relative angle value. This correction and preprocessing is a conventional method in this field and will not be described in detail here.

[0089] In summary, the auxiliary safety device and its safety monitoring method for safety belts include several first ultrasonic ranging sensors and several second ultrasonic ranging sensors that measure distances in the horizontal and vertical directions, respectively, to obtain horizontal and vertical ranging data; a gyroscope for detecting posture data; a microcomputer system that analyzes the horizontal, vertical, and posture data to assess the safety status of the safety belt corresponding to the auxiliary safety device, determining whether there is a risk of "low-mounted, high-used" safety belts; and a wireless communication module that sends the assessment results to a monitoring center, allowing the center to promptly send alarm notifications to the users of the safety belts, enabling them to adjust their usage accordingly. This auxiliary safety device works synchronously with the safety belts, adapting to situations where personnel frequently change locations on construction sites. It eliminates the need for additional video monitoring equipment and AI analysis, reducing monitoring time delays, facilitating on-site use, and providing timely reminders of the "low-mounted, high-used" safety belt risks, thereby improving the reliability of safety management in construction projects.

[0090] The above is only one specific embodiment of the present invention, and any improvements made based on the concept of the present invention shall be considered within the scope of protection of the present invention.

Claims

1. A safety monitoring method for auxiliary safety devices used in seat belts, wherein, The auxiliary safety device includes: a housing, characterized in that, The top of the housing is provided with a plurality of first ultrasonic ranging sensors; the first ultrasonic ranging sensors are used to measure distance in the horizontal direction and obtain horizontal ranging data. The bottom of the housing is provided with a plurality of second ultrasonic ranging sensors; the second ultrasonic ranging sensors are used to measure distance in the vertical direction and obtain vertical ranging data. A gyroscope is also provided at the bottom of the housing; the gyroscope is used to detect the position and pose data of the housing. The housing is equipped with a microcomputer system and a wireless communication module. The microcomputer system is connected to the first ultrasonic ranging sensor, the second ultrasonic ranging sensor and the gyroscope. Based on the horizontal ranging data, the vertical ranging data and the pose data, the microcomputer system evaluates the safety status of the seat belt corresponding to the auxiliary safety device and obtains the corresponding evaluation results. The wireless communication module is connected to the microcomputer system and is used to send the evaluation results to the monitoring center; The auxiliary safety device is connected to the suspension component via a soft sling with hooks; The seat belt is connected to the suspension component via a seat belt hook; The seatbelt hook is connected to the auxiliary safety device via a soft connecting strap; The security monitoring method includes: Step S1: Based on the pose data detected by the gyroscope, determine whether the shell has an angle with the vertical direction; based on the determination result of whether the shell has an angle with the vertical direction, preprocess the horizontal ranging data and the vertical ranging data. Step S2: Based on the horizontal ranging data, obtain the relative distance between the auxiliary safety device and the obstacle located to its side; based on the relative distance, determine whether the auxiliary safety device is interfered with by the obstacle located to its side, and based on the determination result of whether the auxiliary safety device is interfered with, send a corresponding evaluation result notification message to the monitoring center. Step S3: When the auxiliary safety device is not interfered with, based on the detection result of the second ultrasonic ranging sensor, it is determined whether the user of the seat belt is in an unknown measurable safety risk state, and based on the determination result of the unknown measurable safety risk state, a corresponding evaluation result notification message is sent to the monitoring center. Step S4: When the user of the seat belt is not in an unknown and measurable safety risk state, the relative distance between the safety auxiliary device and the obstacle located below it is obtained based on the vertical distance measurement data; based on the relative distance, it is determined whether the user of the seat belt is in a safe state, and based on the determination result of the safe state, a corresponding evaluation result notification message is sent to the monitoring center.

2. The security monitoring method as described in claim 1, characterized in that: The top of the housing is provided with four first ultrasonic ranging sensors, which are respectively located at the center of the four sides of the top of the housing. Two second ultrasonic ranging sensors are provided at the bottom of the housing, and the two second ultrasonic ranging sensors are respectively located at the center of two opposite sides of the bottom of the housing. The gyroscope is located at the bottom.

3. The security monitoring method as described in claim 1, characterized in that: The bottom of the shell is also provided with several counterweights.

4. The security monitoring method as described in claim 1, characterized in that: In step S1, based on the pose data detected by the gyroscope, it is determined whether the housing has an angle with the vertical direction; based on the determination result of whether the housing has an angle with the vertical direction, the horizontal ranging data and the vertical ranging data are preprocessed, including: The pose data detected by the gyroscope is analyzed to obtain the relative angle between the bottom normal direction of the shell and the vertical direction; if the relative angle value is equal to zero, it is determined that there is no angle between the shell and the vertical direction; if the relative angle value is not equal to zero, it is determined that there is an angle between the shell and the vertical direction. When the shell has an angle with the vertical direction, the horizontal and vertical distance measurement data are corrected and preprocessed based on the relative angle value; when the shell does not have an angle with the vertical direction, the horizontal and vertical distance measurement data are not corrected and preprocessed.

5. The security monitoring method as described in claim 1, characterized in that: In step S2, based on the horizontal ranging data, the relative distance between the auxiliary safety device and the obstacle located to its side is obtained; based on the relative distance, it is determined whether the auxiliary safety device is interfered with by the obstacle located to its side, and based on the determination result of whether the auxiliary safety device is interfered with, a corresponding evaluation result notification message is sent to the monitoring center, including: The horizontal ranging data is analyzed to obtain the relative horizontal distance between the auxiliary safety device and the obstacle located to its side; based on the position information of the ultrasonic transmitting component and the ultrasonic receiving component of the first ultrasonic ranging sensor, the detection blind zone width of the first ultrasonic ranging sensor is determined; if the relative horizontal distance is greater than the detection blind zone width, it is determined that the auxiliary safety device is not interfered with by the obstacle located to its side; otherwise, it is determined that the auxiliary safety device is interfered with by the obstacle located to its side. When the auxiliary safety device is not interfered with, it sends a notification message to the monitoring center indicating that the unknown measurable safety risk has been eliminated; when the auxiliary safety device is interfered with, it sends a notification message to the monitoring center indicating the difference between the relative horizontal distance and the detection blind zone width.

6. The security monitoring method as described in claim 1, characterized in that: In step S3, when the auxiliary safety device is not interfered with, based on the detection result of the second ultrasonic ranging sensor, it is determined whether the user of the seat belt is in an unknown measurable safety risk state, and based on the determination result of the unknown measurable safety risk state, a corresponding assessment result notification message is sent to the monitoring center, including: When the auxiliary safety device is not interfered with, the detection result of the second ultrasonic ranging sensor is used to determine whether the second ultrasonic ranging sensor has an incorrect ranging reading; if the second ultrasonic ranging sensor has an incorrect ranging reading, it is determined that the user of the safety belt is in a state of unknown measurable safety risk; if the second ultrasonic ranging sensor has no incorrect ranging reading, it is determined that the user of the safety belt is not in a state of unknown measurable safety risk. When the user of the seat belt is in a state of unknown measurable safety risk, a notification message containing the unknown measurable safety risk has not been eliminated is sent to the monitoring center; when the user of the seat belt is not in a state of unknown measurable safety risk, a notification message containing the unknown measurable safety risk has been eliminated is sent to the monitoring center.

7. The security monitoring method as described in claim 1, characterized in that: In step S4, when the user of the seatbelt is not in a state of unknown measurable safety risk, the relative distance between the safety assist device and the obstacle located below it is obtained based on the vertical distance measurement data; based on the relative distance, it is determined whether the user of the seatbelt is in a safe state, and based on the determination result of the safe state, a corresponding evaluation result notification message is sent to the monitoring center, including: When the user of the seat belt is not in a state of unknown measurable safety risk, the vertical distance measurement data is analyzed to obtain the relative vertical distance between the bottom of the safety auxiliary device and the obstacle located below it; based on the relative vertical distance and the relative vertical distance between the bottom of the auxiliary safety device and its corresponding suspension component, a first total distance value is obtained. Based on the length of the seat belt, the length of the corresponding seat belt hook, and the preset body width of the user, a second total distance value is obtained; the first total distance value is compared with the second total distance value. If the first total distance value is greater than the second total distance value, the user of the seat belt is in a safe state; otherwise, the user of the seat belt is determined to be in an unsafe state. When the user is in a safe state, a notification message is sent to the monitoring center indicating that the user is currently using the seat belt correctly; when the user is not in a safe state, a notification message is sent to the monitoring center indicating that the user is not using the seat belt correctly.

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