Full-automatic roller shutter door wind-resistant locking device and control method

Abstract

The application discloses a full-automatic roller shutter door wind-resistant locking device. The full-automatic roller shutter door wind-resistant locking device comprises a guide rail and a control mechanism. A guide groove is arranged in the guide rail and used for accommodating a side edge part of a roller shutter door curtain. At least one air bag is arranged in the guide groove and located at the side of the roller shutter door curtain. A gas charging and discharging mechanism is connected with the air bag through a pipeline and used for charging or discharging the air bag. The control mechanism is electrically connected with a driving motor used for driving the roller shutter door to lift and the gas charging and discharging mechanism. The control mechanism controls the gas charging and discharging unit to charge the air bag in response to receiving a trigger signal representing a precursor of a gale, so that the air bag is inflated and fills a gap between the guide groove and the roller shutter door curtain to limit the transverse displacement of the roller shutter door curtain. The full-automatic roller shutter door wind-resistant locking device has the advantages of flexible limiting and low noise.

Description

Technical Field

[0001] This invention relates to the technical field of roller shutter doors, and more particularly to a fully automatic wind-resistant locking device and control method for roller shutter doors. Background Technology

[0002] Roller shutters consist of multiple articulated door panels linked together, rotating up and down around a central roller within fixed tracks. Like walls, roller shutters serve as horizontal partitions. However, relying solely on the simple interlocking of the curtain edges and guide rails for restraint, strong winds cause significant lateral swaying of the curtains. When this swaying exceeds the restraint range of the guide rails, the curtains can easily detach, causing the roller shutter to fail. The lateral thrust generated by strong winds acts directly on the curtains; without lateral support, excessive local stress can cause bending, denting, and other plastic deformations, potentially tearing the curtains or damaging the guide rail structure, resulting in high repair costs and difficult replacement. Currently, wind-resistant structures often use rigid metal components, which generate strong impacts during wind-induced swaying, causing not only component wear but also continuous impact noise. Daily operation requires low resistance on the curtains, while high-wind conditions require high-strength restraint, creating a conflict between restraint effectiveness and daily operation. Summary of the Invention

[0003] This invention is based on the inventor's discoveries and understanding of the following facts and problems:

[0004] Poor limiting effect and high noise.

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, embodiments of the present invention propose a fully automatic wind-resistant locking device for roller shutter doors, including a guide rail and a control mechanism. The guide rail is provided with a guide groove for accommodating the side portion of the roller shutter door slats. At least one airbag is arranged in the guide groove and located beside the roller shutter door slats. An inflation / deflation mechanism is connected to the airbag via a pipeline for inflating or deflating the airbag. The control mechanism is electrically connected to a drive motor for driving the roller shutter door to rise and fall and the inflation / deflation mechanism. In response to receiving a trigger signal indicating an impending strong wind, the control mechanism controls the inflation / deflation unit to inflate the airbag, causing the airbag to expand and fill the gap between the guide groove and the roller shutter door slats to limit the lateral displacement of the roller shutter door slats.

[0007] The present invention provides advantages and technical effects such as flexible limiting and low noise. This application achieves flexible limiting of the roller shutter door through the cooperation of an airbag and an inflation / deflation mechanism.

[0008] In some embodiments, the system further includes a wind-resistant hook that extends into the guide groove and is connected to the roller shutter slat. The two sides of the airbag are in contact with the wind-resistant hook and the inner wall of the guide groove, respectively. When inflated, the airbag can press the wind-resistant hook against the inner wall of the guide groove and confine it within the guide groove to limit the lateral displacement of the roller shutter slat.

[0009] In some embodiments, the control mechanism includes a controller and a sensor group, the sensor group being electrically connected to the controller for acquiring and generating the trigger signal; the sensor group includes: a vibration sensor, a Hall sensor assembly, and a resistance detection unit; the vibration sensor is respectively arranged on the top beam, the guide rail, and the bottom crossbeam above the housing for acquiring vibration characteristic signals of the door; the Hall sensor assembly is disposed on the drive motor for acquiring motion state signals characterizing the running speed and lifting position of the roller shutter slats; the resistance detection unit is electrically connected to the drive motor for acquiring motor current signals characterizing the running load resistance of the door.

[0010] In some embodiments, a non-metallic wear-resistant layer is provided on the inner wall of the guide groove of the roller shutter slat and / or the guide rail. The non-metallic wear-resistant layer is used to protect the roller shutter slat and / or the guide rail. The non-metallic wear-resistant layer is an MC nylon wear-resistant layer. A silane coupling agent interface activation layer is provided between the non-metallic wear-resistant layer and the metal substrate of the roller shutter slat or the guide rail.

[0011] In some embodiments, the drive assembly further includes a coupling and a gear transmission group, the output end of the drive motor is connected to the output shaft of the gear group through the coupling, the output shaft of the gear shaft is connected to the reel, and a wear-resistant silicone buffer pad layer is provided inside the coupling.

[0012] In some embodiments, a locking block is further included, wherein a wear-resistant rubber buffer strip is provided on the inner side of the locking block and the contact surface with the guide rail, and a buffer cylinder is provided on the telescopic end of the locking block to make the locking block flexibly contact the guide rail.

[0013] In some embodiments, the Hall sensing component includes a magnet connected to the drive motor and a Hall sensor disposed opposite to the magnet; the control mechanism calculates the real-time linear velocity of the roller shutter slats by the number of Hall pulses received per unit time, and calculates the real-time lifting position of the roller shutter slats by the total number of accumulated pulses.

[0014] In some embodiments, the resistance detection unit includes a sampling resistor, a filtering circuit, an amplification circuit, and an analog-to-digital converter. The sampling resistor is connected in series with the power supply circuit of the drive motor. The signal output terminal of the sampling resistor is sequentially connected to the filtering circuit, the amplification circuit, and the analog-to-digital converter. The analog-to-digital converter is connected to the controller to convert the continuously changing analog voltage signal into a digital signal and transmit it to the controller.

[0015] In some embodiments, an infrared beam sensor or a laser rangefinder is also included, arranged on both sides of the housing to form a detection screen in the area where the roller shutter falls, and the infrared beam sensor or laser rangefinder is connected to the controller.

[0016] An embodiment of the present invention provides a control method for a fully automatic wind-resistant locking device for roller shutter doors, comprising the following steps: Data acquisition: The sensor group of the control mechanism continuously collects vibration data fed back by multiple vibration sensors, motor current data fed back by the resistance detection unit, and speed and position data of the roller shutter door curtain fed back by the Hall sensor component. The control mechanism performs multi-dimensional data cross-validation and time-series trend analysis based on vibration data, motor current data, speed and position data to determine the wind level of the current environment. When the vibration sensor detects low-frequency reciprocating vibration in the lateral direction, the resistance detection unit collects a steady-state current rise with a small fluctuation exceeding the threshold, and the Hall sensor component monitors that the actual linear velocity decreases relative to the set velocity and is accompanied by displacement deviation, it is determined to be a precursor to a strong wind and triggers a wind warning. The system employs tiered control. Based on the determined wind condition level, the control mechanism executes corresponding wind-resistant locking and electronic speed control actions. The wind-resistant locking actions include: a warning standby phase, where the control mechanism locks the roller shutter slats to stop further raising and lowering when slight wind vibration and a slight increase in resistance are detected; a pre-locking protection phase, where the control mechanism controls the inflation / deflation mechanism to slightly inflate the airbags to limit the lateral swing amplitude of the roller shutter slats when the wind condition persists; a full-locking reinforcement phase, where the control mechanism controls the airbags to fully inflate and lock the roller shutter slats to the guide rails when the vibration amplitude and operating resistance reach the heavy wind load threshold, and the linear velocity decreases and the position deviation intensifies; and a reset phase, where the control mechanism monitors data from various sensors. When the wind vibration dissipates, the operating resistance returns to the reference range, and the speed and position return to the reference range and remain there for a set duration, the control mechanism determines that the wind force has subsided, controls the airbags to deflate to release the lock, and controls the roller shutter slats to return to the preset position based on the position data.

[0017] This application offers the following advantages: The wind-resistant hook, combined with an airbag, achieves dual locking through mechanical limiting and flexible support, preventing the curtain slats from derailing or shifting laterally under strong winds. The controller and sensor group collect real-time data on door vibration, motion status, and load resistance, providing data for intelligent prediction. The nylon wear-resistant layer and silane coupling agent interface activation layer reduce sliding friction resistance and operating noise, eliminate direct metal wear, and enhance the adhesion between the non-metallic layer and the substrate. The coupling and gear transmission group absorb rigid vibration and torque impact during motor start-up and shutdown, reducing transmission noise. The locking block, combined with a wear-resistant rubber buffer strip, eliminates metal impact noise during locking, achieving flexible buffering throughout the locking process. Hall effect sensors provide data for determining wind load levels and the engagement of the wind-resistant locking mechanism. The resistance detection unit collects motor current to calculate operating resistance, distinguishing between continuous wind load resistance and instantaneous foreign object obstruction through current waveform characteristics. Infrared beam sensors or laser rangefinders provide full-screen, blind-spot-free safety detection of the door's falling path. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the fully automatic roller shutter door wind-resistant locking device according to an embodiment of the present invention.

[0019] Reference numerals: 1. Roller shutter slats; 2. Guide rail; 3. Wind-resistant hook; 4. Airbag; 5. Non-metallic wear-resistant layer. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] An embodiment of the present invention provides a fully automatic wind-resistant locking device for roller shutter doors, including a guide rail and a control mechanism. The guide rail is provided with a guide groove for accommodating the side portion of the roller shutter door slats. At least one airbag is arranged in the guide groove and located beside the roller shutter door slats. An inflation / deflation mechanism is connected to the airbag via a pipeline to inflate or deflate the airbag. The control mechanism is electrically connected to the drive motor for driving the roller shutter door to rise and fall and the inflation / deflation mechanism, respectively. In response to receiving a trigger signal indicating an impending strong wind, the control mechanism controls the inflation / deflation unit to inflate the airbag, causing the airbag to expand and fill the gap between the guide groove and the roller shutter door slats to limit the lateral displacement of the roller shutter door slats.

[0022] The guide rails provide a stable vertical running channel for the roller shutter door. Airbags, positioned within the guide rails, utilize their flexible physical contact to ensure unimpeded daily free lifting and lowering of the roller shutter door, while generating a uniform compressive locking force during expansion to prevent slat wear. The inflation / deflation mechanism, connected to the airbags via piping, serves as the power source for inflating or deflating the airbags, thus providing the locking action. The control mechanism is electrically connected to both the drive motor for raising and lowering the roller shutter door and the inflation / deflation mechanism, enabling centralized control. Responding to trigger signals indicating impending strong winds, the control mechanism can proactively address severe weather conditions without manual intervention. When this signal is triggered, the inflation / deflation unit inflates the airbags, filling the gap between the guide rails and the roller shutter slats to limit lateral displacement of the slats. The drive motor first smoothly lowers the roller shutter door to the preset closed position. The inflation / deflation mechanism then injects high-pressure gas into the airbag, increasing its volume and forcefully pressing the sides of the curtain slats. This confines the curtain slats, which are prone to shaking and derailment due to negative pressure in strong winds, within the guide rails, enhancing overall wind resistance and disaster prevention capabilities. The inflation / deflation mechanism includes an air compressor, a one-way valve, an air tank, an electromagnetic inflation valve, and an electromagnetic pressure relief valve. Pressure sensors are located on the pipeline to provide feedback on the pressure inside the airbag, and the air tank stores high-pressure gas for instantaneous response.

[0023] In some embodiments, the system further includes a wind-resistant hook that extends into the guide groove and is connected to the roller shutter slats. The two sides of the airbag contact the wind-resistant hook and the inner wall of the guide groove, respectively. The inflated airbag can press the wind-resistant hook against the inner wall of the guide groove and confine it within the guide groove to limit the lateral displacement of the roller shutter slats.

[0024] Specifically, it also includes wind-resistant hooks that extend inside the guide groove and are connected to the roller shutter slats. The wind-resistant hooks have hook-like parts for engaging with the edge of the guide rail. As a rigid component, the wind-resistant hooks bear the enormous negative pressure pull-out force generated by strong external winds, enhancing the mechanical tensile strength of the door edges. The airbags on both sides contact the wind-resistant hooks and the inner wall of the guide groove, respectively. The lateral thrust generated when the airbags inflate acts directly on the surface of the wind-resistant hooks, preventing the slats from being deformed under pressure and protecting the door structure, especially the slats, from mechanical deformation that could cause jamming. The elastic deformation of the airbags absorbs the high-frequency vibration and impact energy from wind loads, improving wind resistance while reducing equipment wear and noise. The airbags provide uniform, dispersed, flexible contact clamping force, transforming the original single sliding friction into stable planar contact clamping, resulting in a stable windproof locking effect. The wind-resistant hook has an inverted L-shaped or T-shaped cross-section. The contact surface of the wind-resistant hook facing the airbag can be covered with a high-friction coefficient anti-slip and wear-resistant pad. Correspondingly, the inner wall of the guide groove is provided with stepped protrusions to form a mechanical interlock with the wind-resistant hook. The airbag can be made of explosion-proof rubber material reinforced with multi-layer high-strength Kevlar fiber. This ensures excellent fatigue life and weather resistance even under high pressure and frequent inflation. In addition, multiple wind-resistant hooks and airbags are densely arranged longitudinally at preset intervals along the height direction of the roller shutter curtain, evenly distributing the concentrated wind load to the entire guide rail and preventing excessive local stress that could lead to material yielding failure.

[0025] In some embodiments, the control mechanism includes a controller and a sensor group. The sensor group is electrically connected to the controller and is used to acquire and generate trigger signals. The sensor group includes a vibration sensor, a Hall sensor assembly, and a resistance detection unit. The vibration sensor is respectively arranged on the top beam, guide rail, and bottom crossbeam above the housing to acquire vibration characteristic signals of the door. The Hall sensor assembly is set on the drive motor to acquire motion state signals characterizing the running speed and lifting position of the roller shutter slats. The resistance detection unit is electrically connected to the drive motor to acquire motor current signals characterizing the running load resistance of the door.

[0026] Specifically, the control mechanism includes a controller and a sensor group. The sensor group is electrically connected to the controller and is used to collect and generate trigger signals. The controller can convert the underlying physical state into digital control commands in real time, enhancing anti-interference capabilities and real-time decision-making. The sensor group includes vibration sensors, Hall effect sensors, and a resistance detection unit. The vibration sensors are respectively arranged on the top beam, guide rail, and bottom crossbeam above the housing to collect vibration characteristic signals from multiple positions of the door. This allows for comprehensive and continuous capture of microscopic mechanical deformation waves of the door in different stiffness axes, improving the accuracy of wind vibration frequency feature extraction. The Hall effect sensors are used on the drive motor to collect motion state signals characterizing the running speed and lifting position of the roller shutter slats. Closed-loop position control is achieved by reusing the inherent components of the motor, eliminating the risk of hard damage to external mechanical limit switches due to harsh environments. The resistance detection unit is electrically connected to the drive motor to collect motor current signals characterizing the load resistance of the door. By directly mapping the current to changes in mechanical friction torque, load monitoring without delay is achieved. With the cooperation of various sensors, when strong winds strike, the vibration sensors at the top beam, guide rail, and bottom crossbeam first collect high-frequency mechanical vibrations, the Hall sensor component senses the instantaneous linear velocity decay and displacement creep caused by speed obstruction, and the resistance detection unit captures the increase in the average current. The data streams of the three dimensions are cross-checked in the controller to avoid false alarms and missed alarms caused by monitoring a single physical quantity, and complete the locking judgment of the wind-resistant locking time in a short time.

[0027] In the actual variant, a triaxial microelectromechanical system (MEMS) piezoelectric accelerometer is selected as the vibration sensor. It captures characteristic waveforms using a specific sampling frequency, and the housing is a dustproof and waterproof metal casing to withstand harsh environments. The Hall effect sensing component includes a multi-pole permanent magnet rotating at high speed coaxially with the motor and orthogonally arranged differential Hall effect chips. The absolute travel of the curtain slats is calculated by statistically analyzing the phase difference direction and pulse frequency of the orthogonal pulses. The resistance detection unit connects a sampling resistor in series in the power supply circuit of the drive motor. The signal terminal of the sampling resistor is connected to a circuit, and the signal is processed to obtain the load change.

[0028] In some embodiments, a non-metallic wear-resistant layer is provided on the inner wall of the guide groove of the roller shutter slat and / or guide rail. The non-metallic wear-resistant layer is used to protect the roller shutter slat and / or guide rail. The non-metallic wear-resistant layer is an MC nylon wear-resistant layer. A silane coupling agent interface activation layer is provided between the non-metallic wear-resistant layer and the metal substrate of the roller shutter slat or guide rail.

[0029] Specifically, the non-metallic wear-resistant layer protects the roller shutter slats and / or rails, isolating direct contact and mechanical friction between metal components and reducing noise. This non-metallic wear-resistant layer is made of MC nylon, which possesses high mechanical rigidity, excellent chemical stability, and self-lubricating friction properties. It can withstand long-term, high-intensity reciprocating scraping and absorb some impact energy, preventing damage to the slats due to friction. A silane coupling agent interface activation layer is placed between the non-metallic wear-resistant layer and the metal substrate of the roller shutter slats or rails to generate interfacial adhesion, preventing localized peeling, detachment, or fall-off of the wear-resistant composite layer under extreme wind loads, high shear stress, or complex alternating weather conditions. The metal substrate serves as the underlying load-bearing base, providing rigid support against hurricane negative pressure, while the MC nylon wear-resistant layer provides a low-resistance, flexible, and smooth surface, achieving high wind resistance, lightweight, low noise, and low energy loss.

[0030] In some embodiments, the drive assembly further includes a coupling and a gear transmission group. The output end of the drive motor is connected to the output shaft of the gear group through the coupling. The output shaft of the gear shaft is connected to the reel. A wear-resistant silicone buffer pad is provided inside the coupling.

[0031] Specifically, the combination of the coupling and gear transmission assembly reduces the speed and increases the torque of the high-speed rotational power of the drive motor, providing rigid, high-torque power. The output end of the drive motor is connected to the output shaft of the gear assembly via the coupling, and the output shaft of the gear assembly is connected to the reel, smoothly transferring the mechanical load, achieving continuous power transmission, and ensuring the stability of the reel's axial rotation. The coupling is equipped with a wear-resistant silicone buffer layer, utilizing the elastic deformation properties of silicone to block and absorb rigid torque impacts during high-speed reverse rotation, direction switching, or sudden start / stop of the motor, eliminating high-frequency metal impact noise and reducing mechanical damage. The coupling adopts a high-elasticity noise-reducing buffer coupling structure, with the internal wear-resistant silicone buffer layer machined into a multi-lobed central elastic body that tightly engages between the metal claw-shaped bosses at both ends to achieve backlash-free synchronous transmission. The gear transmission assembly adopts a helical gear transmission system, with polished tooth surfaces coated with highly adhesive solid grease to isolate air and suppress noise during meshing.

[0032] In some embodiments, a locking block is further included, with a wear-resistant rubber buffer strip provided on the inner side of the locking block and the contact surface with the guide rail, and a buffer cylinder provided on the telescopic end of the locking block to make the locking block flexibly contact the guide rail.

[0033] Specifically, upon receiving an action command, the locking block provides normal locking force and mechanical obstruction, creating a rigid limit on the roller shutter slats or guide rails to prevent the door from derailing or shifting significantly under severe wind loads. A wear-resistant rubber buffer strip is installed on the contact surface between the locking block and the guide rail. The high elasticity and high coefficient of friction of the wear-resistant rubber increase static friction when the locking block and guide rail are pressed together, enhancing the locking effect. The high elasticity also prevents the locking block from scratching or abrading the metal surface of the guide rail. A buffer cylinder is installed at the extension end of the locking block to allow for flexible contact between the locking block and the guide rail. The gas inside the cylinder provides pneumatic buffering at the moment the locking block extends and contacts the guide rail, reducing rigid collisions and hard impacts, and minimizing mechanical damage to the transmission mechanism.

[0034] When the control mechanism issues an emergency wind-resistant locking command, the buffer cylinder, acting as a flexible drive, smoothly propels the locking block towards the guide rail. At the moment of initial contact, the wear-resistant rubber buffer strip absorbs and converts the propulsive kinetic energy, transforming the rigid collision into a gradual, flexible contact. After the locking action is fully in place, the thrust of the buffer cylinder is evenly transmitted to the guide rail surface through the locking block and the rubber buffer strip, transforming it into surface contact static friction resistance, thus buffering and dissipating the wind vibration impact energy brought by the external wind.

[0035] The locking block can be made of high-strength forged steel, aerospace aluminum alloy, or surface-hardened metal. Its end facing the guide rail has a V-groove, C-groove, or arc-shaped contact surface that matches the guide rail's outline, maximizing the effective contact area. The wear-resistant rubber buffer strip is made of nitrile rubber (NBR), hydrogenated nitrile rubber (HNBR), or high-density polyurethane (PU), designed for wear resistance, tear resistance, and resistance to oil stains and weathering. It is mechanically fitted and fixed to the inside of the locking block using dovetail grooves and adhesive bonding, preventing localized peeling or detachment under high-frequency stress. The buffer cylinder is a double-acting cylinder with a built-in magnetic switch. Both the air input and exhaust ends are equipped with one-way throttle valves or proportional pressure control valves to adjust the cylinder's propulsion speed based on different wind speeds and vibration intensities reported by the sensor array.

[0036] In some embodiments, the Hall sensing component includes a magnet connected to a drive motor and a Hall sensor disposed opposite to the magnet; the control mechanism calculates the real-time linear velocity of the roller shutter slats by the number of Hall pulses received per unit time, and calculates the real-time lifting position of the roller shutter slats by accumulating the total number of pulses.

[0037] Specifically, the non-contact magnetoelectric conversion structure eliminates mechanical wear, contact oxidation, and electrical spark interference, enabling long-term stable operation and providing excellent dustproof, oil-proof, and vibration-resistant performance. The control mechanism calculates the real-time linear velocity of the roller shutter slats by analyzing the number of Hall pulses received per unit time, discretizing the continuous mechanical rotation speed into high-frequency pulse frequencies. This high-frequency sampling provides real-time linear velocity, capturing slat stall caused by instantaneous external wind loads, providing data for wind-resistant locking and protection. The total number of accumulated pulses is used to calculate the real-time lifting and lowering position of the roller shutter slats, enabling mapping of the slats at any height and improving the motion accuracy and repeatability of the door's start-stop control.

[0038] When the drive motor moves the roller and curtain slats up and down, the magnets rotate synchronously. The Hall sensor captures the changes in magnetic flux in real time and converts them into a high-frequency square wave pulse train. The control mechanism calculates the instantaneous linear velocity of the curtain slats using a sampling window or pulse interval in the time dimension, and accumulates the pulse edges in the spatial dimension to calculate the displacement, thus obtaining the standard "position-velocity" timing characteristic curve of the roller shutter door's entire lifting and lowering stroke. When the door is subjected to strong winds at a certain local height, the system can lock the current suspension height of the curtain slats by accumulating the total number of pulses. It can sense the linear velocity decay by detecting sudden drops or fluctuations in the number of pulses per unit time. Combined with resistance load signals such as motor current, it can identify whether the increase in pure wind load is due to environmental wind pressure or ordinary mechanical jamming, thus completing a highly accurate graded wind-resistant locking timing decision.

[0039] The magnet is a neodymium iron boron permanent magnet radial ring magnet. The Hall sensor is set on the radial outside of the magnet. By analyzing the orthogonal phase difference between the two output pulse signals (i.e., A and B phases are 90° apart), the forward and reverse direction of the drive motor is identified, and the position counter is controlled to automatically increment or decrement.

[0040] In some embodiments, the resistance detection unit includes a sampling resistor, a filter circuit, an amplifier circuit, and an analog-to-digital converter. The sampling resistor is connected in series with the power supply circuit of the drive motor. The signal output terminal of the sampling resistor is connected in sequence to the filter circuit, the amplifier circuit, and the analog-to-digital converter. The analog-to-digital converter is connected to the controller to convert the continuously changing analog voltage signal into a digital signal and transmit it to the controller.

[0041] Specifically, the sampling resistor is connected in series with the power supply circuit of the drive motor, directly and linearly converting the internal bus current of the drive motor into an analog voltage signal, ensuring the capture of dynamic changes in the door's running resistance. The signal output terminal of the sampling resistor is connected in sequence to a filter circuit, an amplifier circuit, and an analog-to-digital converter, which can progressively eliminate background noise and amplify the effective characteristic signal, improving the signal-to-noise ratio and the accuracy of subsequent data processing. The analog-to-digital converter is connected to the controller to convert the continuously changing analog voltage signal into a digital signal and transmit it to the controller, achieving accurate mapping and providing the controller with high-resolution, highly interference-resistant input data. A high-precision sampling resistor, such as a 0.1Ω / 5W resistor, is selected. The filter circuit uses RC hardware filtering.

[0042] In some embodiments, an infrared beam sensor or a laser rangefinder is also included, arranged on both sides of the housing to form a detection screen in the area where the roller shutter falls. The infrared beam sensor or the laser rangefinder is connected to the controller.

[0043] Specifically, a non-contact photoelectric protective barrier is constructed directly below the roller shutter door and in key areas along its operating trajectory. This barrier provides real-time, blind-spot-free dynamic monitoring of obstacles crossing the boundary, eliminating the drawbacks of traditional contact-based anti-pinch systems, such as slow response, physical collision, and susceptibility to hard damage. Infrared beam sensors or laser rangefinders are connected to the controller to establish a safe signal transmission channel. When the light path is blocked or the distance changes abruptly, a trigger signal is fed into the control mechanism in a very short time, enabling the system to brake urgently and reverse safely.

[0044] The infrared beam sensor uses a multi-beam synchronous scanning light curtain, also known as a safety light curtain, which is linearly and densely arranged at multiple points along the vertical height of the guide rails on both sides of the enclosure, forming a cross detection network with a height of no less than two meters, preventing low-lying objects or suspended foreign objects from becoming blind spots. The laser rangefinder sensor can be a lidar, installed on both sides of the top of the roller shutter door and tilted downwards to form a radial fan-shaped scanning surface at a specific angle.

[0045] An embodiment of the present invention provides a control method for a fully automatic wind-resistant locking device for roller shutter doors, comprising the following steps: Data acquisition: The sensor group of the control mechanism continuously collects vibration data fed back by multiple vibration sensors, motor current data fed back by the resistance detection unit, and speed and position data of the roller shutter door curtain fed back by the Hall sensor component. The control mechanism performs multi-dimensional data cross-validation and time-series trend analysis based on vibration data, motor current data, speed and position data to determine the wind level of the current environment. When the vibration sensor detects low-frequency reciprocating vibration in the lateral direction, the resistance detection unit collects a steady-state current rise with a small fluctuation exceeding the threshold, and the Hall sensor component monitors that the actual linear velocity decreases relative to the set velocity and is accompanied by displacement deviation, it is determined to be a precursor to a strong wind and triggers a wind warning. The system employs tiered control, where the control mechanism executes corresponding wind-resistant locking and electronic speed control actions based on the determined wind condition level. The wind-resistant locking actions include: during the early warning and standby phase, when a slight wind vibration is detected and the resistance increases slightly, the control mechanism locks the roller shutter slats to stop further raising and lowering; and quickly puts the door into static defense mode to prevent the slats from getting stuck in the guide rail due to uneven lateral wind pressure during dynamic raising and lowering, or from being damaged by severe hard friction.

[0046] During the pre-locking protection phase, when wind conditions persist, the control mechanism controls the inflation / deflation mechanism to slightly inflate the airbag and lock it in place, limiting the lateral sway of the roller shutter slats. The initial low-pressure inflation of the flexible airbag provides appropriate physical restraint and energy-dissipating damping, suppressing high-frequency, high-amplitude swaying of the slats, eliminating impact noise, preserving adjustment margins, and avoiding mechanical stress concentration caused by blind overload locking. During the full locking and reinforcement stage, when the vibration amplitude and running resistance reach the heavy wind load threshold, and the linear velocity decreases and the positional deviation intensifies, the airbag is fully inflated to lock the roller shutter slats to the guide rail. Under extremely harsh working conditions, a rigid-flexible integrated surface contact physical wind-resistant structure is constructed to evenly distribute the wind load onto the overall guide rail, preventing catastrophic consequences such as the roller shutter door derailing, slat breakage, or being blown away by wind pressure.

[0047] During the reset phase, the control mechanism monitors data from various sensors. Once the wind vibration dissipates, the operating resistance returns to the reference range, and the speed and position return to the reference range and remain there for the set duration, the control mechanism determines that the wind force has subsided, deflates the control airbag to release the lock, and controls the roller shutter curtain to return to the preset position based on the position data. By observing and resetting for a set duration, malfunctions caused by instantaneous gusts and sudden, fluctuating airflow vortices are avoided, achieving an automatic transition from the windproof locking state to the normal production and passage state, which helps to achieve unattended control throughout the entire lifecycle. The reference range, reference range, and preset position data are obtained under normal, windless operating conditions by controlling the roller shutter door to perform at least one complete lifting and lowering stroke, recording the inherent mechanical vibration amplitude, bus current reference, and Hall slip ratio at each position during the entire stroke.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0050] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0051] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0053] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fully automatic wind-resistant locking device for roller shutter doors, characterized in that, include: The guide rail has a guide groove inside for accommodating the side part of the roller shutter slat. At least one airbag is arranged in the guide groove and located next to the roller shutter slat. An inflation / deflation mechanism is connected to the airbag through a pipeline to inflate or deflate the airbag. The control mechanism is electrically connected to the drive motor for driving the roller shutter door to rise and fall and the inflation / deflation mechanism, respectively. In response to receiving a trigger signal indicating an impending strong wind, the control mechanism controls the inflation / deflation unit to inflate the airbag, causing the airbag to expand and fill the gap between the guide groove and the roller shutter door slats to limit the lateral displacement of the roller shutter door slats.

2. The fully automatic roller shutter door wind-resistant locking device according to claim 1, characterized in that, It also includes a wind-resistant hook that extends into the guide groove and is connected to the roller shutter slat. The two sides of the airbag are in contact with the wind-resistant hook and the inner wall of the guide groove, respectively. After inflation, the airbag can press the wind-resistant hook against the inner wall of the guide groove and confine it within the guide groove to limit the lateral displacement of the roller shutter slat.

3. The fully automatic roller shutter door wind-resistant locking device according to claim 1, characterized in that, The control mechanism includes a controller and a sensor group. The sensor group is electrically connected to the controller and is used to collect and generate the trigger signal. The sensor group includes a vibration sensor, a Hall sensor assembly, and a resistance detection unit. The vibration sensor is respectively arranged on the top beam, the guide rail, and the bottom crossbeam above the housing to collect vibration characteristic signals of the door. The Hall sensor assembly is set on the drive motor to collect motion state signals characterizing the running speed and lifting position of the roller shutter slats. The resistance detection unit is electrically connected to the drive motor to collect motor current signals characterizing the running load resistance of the door.

4. The fully automatic roller shutter door wind-resistant locking device according to claim 1, characterized in that, A non-metallic wear-resistant layer is provided on the inner wall of the guide groove of the roller shutter slat and / or the guide rail. The non-metallic wear-resistant layer is used to protect the roller shutter slat and / or the guide rail. The non-metallic wear-resistant layer is an MC nylon wear-resistant layer. A silane coupling agent interface activation layer is provided between the non-metallic wear-resistant layer and the metal substrate of the roller shutter slat or the guide rail.

5. The fully automatic roller shutter door wind-resistant locking device according to claim 1, characterized in that, It also includes a coupling and a gear transmission assembly. The output end of the drive motor is connected to the output shaft of the gear assembly through the coupling. The output shaft of the gear shaft is connected to the reel. A wear-resistant silicone buffer pad is provided inside the coupling.

6. The fully automatic roller shutter door wind-resistant locking device according to claim 1, characterized in that, It also includes a locking block, on which a wear-resistant rubber buffer strip is provided on the inner side of the locking block and the contact surface with the guide rail, and a buffer cylinder is provided at the telescopic end of the locking block to make the locking block flexibly contact the guide rail.

7. The fully automatic roller shutter door wind-resistant locking device according to claim 3, characterized in that, The Hall sensor assembly includes a magnet connected to the drive motor and a Hall sensor disposed opposite to the magnet; the control mechanism calculates the real-time linear velocity of the roller shutter slats by the number of Hall pulses received per unit time, and calculates the real-time lifting position of the roller shutter slats by the total number of accumulated pulses.

8. The fully automatic roller shutter door wind-resistant locking device according to claim 3, characterized in that, The resistance detection unit includes a sampling resistor, a filter circuit, an amplifier circuit, and an analog-to-digital converter. The sampling resistor is connected in series with the power supply circuit of the drive motor. The signal output terminal of the sampling resistor is connected in sequence to the filter circuit, the amplifier circuit, and the analog-to-digital converter. The analog-to-digital converter is connected to the controller to convert the continuously changing analog voltage signal into a digital signal and transmit it to the controller.

9. The fully automatic roller shutter door wind-resistant locking device according to claim 3, characterized in that, It also includes infrared beam sensors or laser rangefinders arranged on both sides of the housing to form a detection screen in the area where the roller shutter falls, and the infrared beam sensors or laser rangefinders are connected to the controller.

10. A control method for a fully automatic roller shutter door wind-resistant locking device, based on the device described in any one of claims 3 and 7-9, characterized in that, Includes the following steps: Data acquisition: The sensor group of the control mechanism continuously collects vibration data fed back by multiple vibration sensors, motor current data fed back by the resistance detection unit, and speed and position data of the roller shutter door curtain fed back by the Hall sensor component. The control mechanism performs multi-dimensional data cross-validation and time-series trend analysis based on vibration data, motor current data, speed and position data to determine the wind level of the current environment. When the vibration sensor detects low-frequency reciprocating vibration in the lateral direction, the resistance detection unit collects a steady-state current rise with a small fluctuation exceeding the threshold, and the Hall sensor component monitors that the actual linear velocity decreases relative to the set velocity and is accompanied by displacement deviation, it is determined to be a precursor to a strong wind and triggers a wind warning. The control mechanism performs corresponding wind-resistant locking and electronic speed regulation actions based on the determined wind condition level. The wind-resistant locking action includes: in the early warning standby stage, when it is determined that there is slight wind vibration and a slight increase in resistance, the control mechanism locks the roller shutter slats to stop them from continuing to rise and fall. During the pre-locking protection phase, when the wind persists, the control mechanism controls the inflation / deflation mechanism to slightly inflate the airbag and lock it in place, limiting the lateral swing amplitude of the roller shutter slats. During the full-locking reinforcement phase, when the vibration amplitude and running resistance reach the heavy wind load threshold, and the linear velocity decreases and the position deviation intensifies, the control mechanism fully inflates the airbag to lock the roller shutter slats to the guide rail. During the reset phase, the control mechanism monitors the data from each sensor. When the wind vibration dissipates, the running resistance returns to the reference range, and the speed and position return to the reference range and remain there for a set time, the control mechanism determines that the wind has subsided and controls the airbag to deflate to release the lock, and controls the roller shutter slats to return to the preset position according to the position data.

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