Emergency control method for high-place operation safety protection

Abstract

The invention discloses an emergency control method for high-place operation safety protection, and the method comprises the steps: a connection state self-inspection step: collecting physical connection signals in real time through a sensor disposed at a device connection node, and judging whether the connection of each part is correct or not; a motion characteristic acquisition step: acquiring motion acceleration data of the operator in real time through an acceleration sensor integrated in an inductor; a falling event judgment step: the control unit distinguishes a normal operation activity from a falling event through a state machine logic algorithm according to the change of the motion acceleration and the corresponding duration; and a multi-stage emergency response step: after the occurrence of the falling event is confirmed, the control unit sequentially triggers an active pull-back instruction, passive energy absorption logic and an automatic help-seeking process. At the millisecond-level moment of falling, the braid is actively pulled back in advance to eliminate a gap, and then passive buffering energy absorption is combined, so that the impact injury and secondary collision risk of a human body are remarkably reduced.

Description

Technical Field

[0001] This invention relates to the technical field of safety protection, and in particular to an emergency control method for safety protection during high-altitude operations. Background Technology

[0002] With the development of industries such as power, construction, communications, and disaster relief, the application scenarios for working at heights are increasing. Due to its high risk, working at heights has always been classified as a special operation, and fall protection safety systems (commonly known as safety belts or safety harnesses) are the last critical line of defense to ensure the safety of workers.

[0003] Currently, the safety protection systems widely used in frontline high-altitude operations mainly rely on passive mechanical structures. A typical fall arrest system usually includes a full-body safety harness (webbing), connectors (such as quick-release buckles and safety hooks), anchor points, and energy absorbers (commonly known as cushioning packs). Its established working principle is as follows: when a worker unfortunately falls, the body will first experience a period of free fall until the safety rope is taut; subsequently, the huge impact force triggers the energy absorber to work (for example, the special stitches inside the tear strip break), absorbing and dissipating some of the kinetic energy of the fall, limiting the final impact force acting on the human body and anchor points to a safe range that the human body can withstand (usually the standard requires less than 6kN), thereby preventing serious bone or internal organ injuries.

[0004] Although existing passive safety protection systems have saved countless lives over the past few decades, their inherent technical limitations are becoming increasingly apparent under increasingly complex operating environments and higher safety management requirements, mainly in the following aspects: The safety of existing systems relies entirely on human operation. In actual high-intensity or emergency operations, due to personnel fatigue, negligence, or obstructed vision, serious safety hazards such as incomplete locking of latches or improper connection of hooks to anchor points are easily encountered. Traditional mechanical connectors cannot automatically detect these conditions and issue warnings to workers, leading to frequent incidents of "locking without protection."

[0005] Existing systems cannot intelligently identify the movement state of workers, nor can they distinguish between large movements during normal operations (such as jumping over obstacles) and actual accidental falls. They rely solely on physical impact as a single trigger condition. This means that before the protective mechanism can function effectively, the human body must first experience an unavoidable period of free fall and the ensuing violent initial impact. This delayed response time and additional fall distance not only increase the risk of secondary collisions with obstacles below but also place enormous psychological and physiological stress on the user. Furthermore, existing cushioning systems, once triggered, involve irreversible and destructive deployment, failing to provide a graded response based on the actual severity of the fall.

[0006] When a fall occurs, if workers are knocked unconscious, injured, or suspended in a blind spot and unable to save themselves, traditional safety harnesses do not have automatic communication capabilities. Rescue often relies on eyewitness accounts and reports from other people on site. This delay in information transmission can easily miss the best rescue opportunity, increase the risk of "suspension injuries" caused by prolonged suspension, and even endanger lives. Summary of the Invention

[0007] Therefore, the technical problem to be solved by the present invention is that existing safety protection technologies for working at heights have the following defects: they cannot actively monitor the connection status, the passive response mechanism is lagging and cannot accurately distinguish fall events, and there is a lack of automatic emergency linkage mechanism.

[0008] The above-mentioned technical problems are solved by the following technical solution: This invention proposes an emergency control method for safety protection of high-altitude operations, including a connection status self-check step: physical connection signals are collected in real time by sensors arranged at the connection nodes of the device to determine whether the connection of each component is correct; motion feature acquisition step: the acceleration data of the operator is acquired in real time by an acceleration sensor integrated in the sensing body; fall event determination step: the control unit distinguishes between normal work activities and fall events based on the change in motion acceleration and the corresponding duration through a state machine logic algorithm; multi-level emergency response step: after confirming the occurrence of a fall event, the control unit sequentially triggers an active pull-back command, passive energy absorption logic, and an automatic rescue process.

[0009] In a preferred embodiment of the emergency control method for safety protection of high-altitude operations described in this invention: the connection status self-test step includes: using a magnet disposed at the male end of the snap fastener connector and a magnetic Hall sensor disposed at the female end to monitor the level signal generated by the Hall sensor in real time; when a magnetic field signal of a specific intensity is detected, it is determined that the connector is in a safe locking state.

[0010] In a preferred embodiment of the emergency control method for safety protection of high-altitude operations described in this invention: the fall event determination step distinguishes between normal jumps and falls by setting time windows and thresholds. The specific logic includes: weightlessness detection: when the acceleration G value is detected to enter the weightlessness range and the duration exceeds the preset first time threshold, an early warning state is triggered; impact confirmation: within the second time window after the early warning state, if a reverse impact acceleration is detected and the instantaneous value exceeds the preset second threshold, it is determined that a fall has occurred.

[0011] In a preferred embodiment of the emergency control method for safety protection of high-altitude operations described in this invention: the first time threshold is set to 200ms to 500ms to eliminate short-term weightlessness interference caused by normal jumping.

[0012] In a preferred embodiment of the emergency control method for safety protection of high-altitude operations described in this invention: the active pull-back logic in the multi-level emergency response steps is as follows: the control unit starts the micro motor within milliseconds after the fall is confirmed; the motor engages instantly through the clutch mechanism, driving the reel to retract a preset distance to eliminate the webbing gap and stop the person from falling in time, the retraction distance being 5cm to 8cm.

[0013] In a preferred embodiment of the emergency control method for safety protection of high-altitude operations described in this invention: the action sequence control in the multi-level emergency response steps is as follows: First stage: in the initial stage of the fall, the micro motor is preferentially triggered to actively and rapidly pull back; Second stage: when the impact force on the system exceeds the preset limit value, the motor locks and pulls back, triggering the flat strap in the buffer bag to unfold and passively tear and absorb energy, so as to achieve secondary protection.

[0014] In a preferred embodiment of the emergency control method for safety protection of high-altitude operations described in this invention: the automatic distress call process specifically includes: while triggering the emergency response, the control unit automatically retrieves GPS positioning data; and through the built-in wireless signal transmission module, automatically sends a distress signal containing location information and a fall event warning to a preset mobile monitoring terminal.

[0015] In a preferred embodiment of the emergency control method for safety protection of working at heights as described in this invention, a vital signs monitoring step is also included: using built-in sensors to monitor the user's vital signs data and suspension status in real time; when the user is detected to be in a dangerous suspension state for a long time, the urgency of the alarm information is increased to provide real-time data support for the formulation of a rescue plan.

[0016] In a preferred embodiment of the emergency control method for safety protection of high-altitude operations described in this invention, the method further includes a device health status self-monitoring step: monitoring whether there is damage, breakage or aging of the fibers inside the webbing through an electronic sensing system; regularly recording the number and severity of fall events, and using this as the basis for determining device maintenance and scrapping.

[0017] In a preferred embodiment of the emergency control method for safety protection of high-altitude operations described in this invention, a risk management step combined with front-end prevention technology is also included: linking the monitoring data of this method with a confined space movement monitoring system or a drone inspection system; dynamically adjusting the sensitivity threshold of the fall judgment logic in this method based on the risk coefficient of the working environment fed back by the external monitoring system.

[0018] The beneficial effects of this invention are as follows: by integrating sensor monitoring, intelligent algorithm judgment, and multi-level active response control methods, it realizes intelligent closed-loop management of the entire process of safety for working at heights; it can not only proactively warn of potential connection status hazards and accurately eliminate interference from normal operation actions to confirm a real fall, but also proactively pull back the webbing to eliminate gaps in the milliseconds before the fall occurs, combined with passive buffering and energy absorption, significantly reducing the impact injury and secondary collision risk to the human body, and automatically sending location distress information, greatly improving the level of safety assurance and accident rescue efficiency in high-risk environments. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 The main flowchart of the emergency control method for safety protection of working at heights is shown; Figure 2 A logical flowchart illustrating the fall event determination steps in an emergency control method for safety protection during high-altitude operations is provided. Figure 3 A sequence diagram of multi-level emergency response actions is shown for emergency control methods for safety protection in high-altitude operations; Figure 4 A hardware system architecture block diagram of an emergency control method for safety protection during high-altitude operations is shown. Figure 5 A schematic diagram illustrating the connection status self-checking principle of the emergency control method for safety protection of working at heights is shown. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0022] Reference Figure 1-5This embodiment provides an emergency control method for safety protection during high-altitude operations, including a connection status self-check step: sensors deployed at the connection nodes of the device collect physical connection signals in real time to determine whether the connections of each component are correct; a motion feature acquisition step: an accelerometer integrated into the sensing body acquires the motion acceleration data of the worker in real time; a fall event determination step: the control unit distinguishes between normal work activities and fall events based on changes in motion acceleration and their corresponding duration using a state machine logic algorithm; and a multi-level emergency response step: after a fall event is confirmed, the control unit sequentially triggers an active pull-back command, passive energy absorption logic, and an automatic rescue process. The control unit continuously cycles through the above monitoring and determination steps at a sampling frequency of, for example, 50Hz to 100Hz to ensure the system is in a real-time standby state.

[0023] The connection status self-test step includes: using a magnet located at the male end of the buckle connector and a magnetic Hall sensor located at the female end to monitor the level signal generated by the Hall sensor in real time; when a magnetic field signal of a specific intensity is detected, the connector is determined to be in a safe locked state. The control unit reads the analog voltage output or digital level status of the Hall sensor. If the read voltage value is within a preset calibration range (e.g., 2.5V ± 0.2V, representing a distance of less than 3mm between the magnet and the sensor), the connection is considered normal; if the voltage exceeds this range, the control unit will trigger a buzzer on the safety belt to emit an intermittent warning sound and illuminate a red LED indicator, prompting the operator to recheck the buckle status.

[0024] The fall event determination process distinguishes between normal jumps and falls by setting time windows and thresholds. The specific logic includes: Weightlessness detection: When the acceleration G value enters the weightlessness zone and its duration exceeds a preset first time threshold, an early warning state is triggered; Impact confirmation: Within a second time window after the early warning state, if a reverse impact acceleration is detected and its instantaneous value exceeds a preset second threshold, a fall is determined to have occurred. The "weightlessness zone" is defined as a resultant acceleration value in the Z-axis direction less than 0.3g; the "second threshold" is used for impact confirmation and is set to greater than 3.0g. In the state machine logic, the system defaults to "monitoring mode." Once the weightlessness condition is met, it switches to "early warning mode" and starts a timer. If an impact signal greater than 3.0g is detected within the subsequent time window, it immediately switches to "fall confirmation mode" and triggers a subsequent response; otherwise, it reverts to "monitoring mode."

[0025] The initial time threshold is set between 200ms and 500ms to eliminate interference from short-term weightlessness caused by normal jumping. When a person takes a step, makes a small jump, or accidentally trips, the duration of their freefall sensation typically does not exceed 200ms. Setting the lower threshold above this effectively filters false alarms; while setting the upper threshold at 500ms ensures that the system can react promptly before the person's falling speed reaches a dangerous level.

[0026] The active pullback logic in the multi-level emergency response steps is as follows: the control unit activates the micro motor within milliseconds after the fall is confirmed; the motor engages instantaneously through the clutch mechanism, driving the reel to retract a preset distance to eliminate webbing gaps and promptly stop the person's fall; the retraction distance is 5cm to 8cm. Specifically, "milliseconds" refers to the time interval from fall confirmation to the motor's activation being less than 100ms. The micro motor uses instantaneous high-voltage drive (e.g., boosted to 24V by a capacitor) for short-duration burst operation, working in conjunction with a reduction gear set to provide sufficient instantaneous torque to overcome the friction between the webbing and clothing, quickly completing the retraction action and preventing the person from experiencing additional acceleration during the fall due to loose webbing.

[0027] The multi-level emergency response sequence is as follows: Phase 1: In the initial stage of the fall, the micro-motor is preferentially triggered for active, rapid pull-back. Phase 2: When the impact force on the system exceeds a preset limit, the motor locks and pulls back, triggering the unfolding of the webbing within the buffer pack for passive tearing and energy absorption, thus achieving secondary protection. The "preset limit" is typically set between 4kN and 6kN (below the limits of human bone strength). Motor locking is achieved through a mechanical ratchet mechanism or the motor's own high holding torque, ensuring that the already retracted webbing will not be pulled out again before the buffer pack intervenes. This tiered mechanism ensures that small impacts are absorbed by the motor, while large impacts are absorbed by the buffer pack, preventing the buffer pack from destructively deploying unnecessarily.

[0028] The automatic distress signal process specifically includes: upon triggering the emergency response, the control unit automatically retrieves GPS positioning data; and via a built-in wireless signal transmission module, it automatically sends a distress signal containing location information and a fall event warning to a pre-set mobile monitoring terminal. The wireless signal transmission module employs wide area network communication technology, such as 4G LTE Cat.1 or NB-IoT, to ensure signal coverage in remote control tower or base station environments. The pre-set mobile monitoring terminal can be a handheld device app used by on-site safety personnel or a server platform in a remote safety management center. The transmitted information also includes the precise timestamp of the fall and the device's remaining battery power.

[0029] Vital signs monitoring steps: Built-in sensors are used to monitor the user's vital signs and suspension status in real time. When the user is detected to be in a dangerous suspension state for an extended period, the urgency of the alarm message is increased, providing real-time data support for the development of a rescue plan. Vital signs monitoring is achieved through photoplethysmography (PPG) sensors or pressure sensors integrated into the chest or leg straps of the seatbelt to monitor heart rate. The logic for determining a "dangerous suspension state" is as follows: After a fall, if the accelerometer shows that the body has remained in a static, vertically suspended posture for more than a preset time (e.g., 5 minutes), and the monitored heart rate is abnormal (e.g., bradycardia), this indicates possible "suspension trauma syndrome," requiring the highest priority rescue.

[0030] The device's health status self-monitoring steps include: monitoring for damage, breakage, or aging of the fibers inside the webbing via an electronic sensing system; periodically recording the number and severity of fall events as a basis for device maintenance and disposal decisions. Electronic sensing monitoring is achieved by weaving extremely fine conductive filaments (such as fine copper wire or conductive polymer fibers) into the critical stress areas of the webbing. The control unit periodically checks the resistance value of the conductive circuit; a significant increase in resistance or an open circuit indicates that the webbing fibers may have broken or suffered severe wear. Each fall event triggering the motor and its peak impact G-value are written into the MCU's internal Flash memory. When the cumulative number of impacts or the intensity of a single impact reaches the disposal standard, the system will prompt the device to be replaced via indicator lights and server software.

[0031] Risk management steps combined with front-end prevention technologies: Link the monitoring data from this method with confined space movement monitoring systems or drone inspection systems; dynamically adjust the sensitivity threshold of the fall detection logic in this method based on the hazard coefficient of the working environment fed back by the external monitoring system. Specifically, when the external meteorological monitoring system reports winds of level 6 or higher at the work site, the control unit, upon receiving this information, will automatically and appropriately increase the "second threshold" (impact acceleration threshold, such as from 3.0g to 3.5g) in the fall detection and slightly extend the "first time threshold" to prevent false alarms caused by strong winds shaking the human body, thus achieving intelligent adjustment for environmental adaptability.

[0032] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. An emergency control method for safety protection during high-altitude operations, characterized in that: include, Connection status self-check steps: Physical connection signals are collected in real time by sensors placed at the device connection nodes to determine whether the connection of each component is correct; Motion feature acquisition steps: The acceleration data of the operator is acquired in real time by an accelerometer integrated into the sensor body; Fall event determination steps: The control unit distinguishes between normal work activities and fall events based on the changes in motion acceleration and the corresponding duration using a state machine logic algorithm; Multi-level emergency response steps: After confirming a fall event, the control unit sequentially triggers the active pull-back command, the passive energy absorption logic, and the automatic distress call process.

2. The emergency control method for safety protection of working at heights according to claim 1, characterized in that: The connection status self-test step includes: The level signal generated by the Hall sensor is monitored in real time by using a magnet located at the male end of the snap fastener connector and a magnetic Hall sensor located at the female end. When a magnetic field signal of a specific intensity is detected, the connector is determined to be in a safe locked state.

3. The emergency control method for safety protection of working at heights according to claim 1, characterized in that: The fall event determination step distinguishes between normal jumps and falls by setting a time window and a threshold. The specific logic includes: Weightlessness detection: When the acceleration G value is detected to enter the weightlessness zone and the duration exceeds the preset first time threshold, an early warning state is triggered; Impact Confirmation: If a reverse impact acceleration is detected within the second time window after the warning state and the instantaneous value exceeds the preset second threshold, it is determined that a fall has occurred.

4. The emergency control method for safety protection of working at heights according to claim 3, characterized in that: The first time threshold is set to 200ms to 500ms to exclude short-term weightlessness interference caused by normal jumping.

5. The emergency control method for safety protection of working at heights according to claim 1, characterized in that: The active pullback logic in the multi-level emergency response steps is as follows: the control unit starts the micro motor within milliseconds after the fall is confirmed; The motor engages instantly via the clutch mechanism, driving the reel to retract a preset distance to eliminate webbing gaps and stop personnel from falling in time. The retraction distance is 5cm to 8cm.

6. The emergency control method for safety protection of working at heights according to claim 1, characterized in that: The timing control of actions in the multi-level emergency response steps is as follows: Phase 1: In the initial stage of the fall, the micro motors are triggered first to actively and rapidly pull back; Second stage: When the impact force on the system exceeds the preset limit value, the motor locks and pulls back, triggering the unfolding of the flat strip in the buffer bag to passively tear and absorb energy, so as to achieve secondary protection.

7. The emergency control method for safety protection of working at heights according to claim 1, characterized in that: The automatic distress call process specifically includes: Upon triggering the emergency response, the control unit automatically retrieves GPS location data; The built-in wireless signal transmission module automatically sends a distress signal containing location information and fall event warnings to a preset mobile monitoring terminal.

8. The emergency control method for safety protection of working at heights according to claim 1, characterized in that: It also includes vital sign monitoring procedures: It uses built-in sensors to monitor the user's vital signs and suspension status in real time; When a user is detected to be in a dangerous suspended state for an extended period of time, the urgency of the alarm message is increased to provide real-time data support for the formulation of a rescue plan.

9. The emergency control method for safety protection of working at heights according to claim 1, characterized in that: It also includes a device health self-monitoring step: The electronic sensing system monitors whether the fibers inside the webbing are damaged, broken, or aged. The frequency and severity of fall incidents are recorded regularly and used as a basis for determining equipment maintenance and decommissioning.

10. The emergency control method for safety protection of working at heights according to claim 1, characterized in that: It also includes risk management steps that are combined with front-end prevention technologies: The monitoring data from this method can be linked with confined space movement monitoring systems or UAV inspection systems. The sensitivity threshold of the fall detection logic in this method is dynamically adjusted based on the hazard coefficient of the working environment fed back by the external monitoring system.

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