Automatic opening, closing and stopping system for roller shutter door

Abstract

According to the automatic opening, closing and stopping system for the roller shutter door, a complete and clear control link is established among a roller shutter door motor, a roller shutter door controller, a PLC, a relay assembly, a limiting detection unit and a trigger signal unit, so that the opening, closing and stopping actions of the roller shutter door can be controlled to be executed under the condition of multi-signal input. Therefore, the limitation that a traditional roller shutter door only depends on a single button or is operated in a manual mode is overcome. The PLC collects instructions from the trigger signal unit through the input module and can establish logical judgment relations between different action instructions and door body states in combination with position signals obtained by the limiting detection unit, it is ensured that the roller shutter door only executes corresponding actions under the safe and allowable conditions, and the safety of the roller shutter door is guaranteed. And potential safety hazards such as top rushing, overwinding or reverse action caused by inaccurate position judgment in a traditional system are effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic opening, closing and stopping of rolling shutter doors, and particularly relates to a rolling shutter door automatic opening, closing and stopping system. BACKGROUND

[0002] With the popularization of intelligent equipment, emergency rescue systems and unmanned equipment, more and more special equipment adopts a closed box structure in the standby, storage and deployment process to protect the equipment from the influence of the external environment. In such a box structure, a liftable or openable door mechanism is often needed to be set to allow the equipment to smoothly enter and exit when receiving an instruction. The rolling shutter door is widely used in various automated facilities and equipment storage units due to its compact structure, small space occupation and smooth opening and closing process.

[0003] The existing rolling shutter door usually relies on a motor drive and realizes opening, closing or stopping actions through a basic control circuit. However, in actual application, the opening and closing behavior of the rolling shutter door is often limited by the installation environment, use scene and control mode. For example, some rolling shutter door systems rely on manual buttons or simple remote control mode for control, which is difficult to meet the needs of remote management or automated operation; some systems rely on traditional electrical design in position detection, limit control, opening and closing stability and safety protection, so that the door body may have inaccurate positioning, deviation in stopping position or unstable running during opening and closing. In addition, the operation modes in different scenes are quite different, and a single control mode is often difficult to adapt to complex and dynamically changing use requirements.

[0004] Therefore, in the automated control of the rolling shutter door, the single operation mode, limited opening and closing positioning accuracy and insufficient safety control capability become problems to be solved. SUMMARY

[0005] The present application provides a rolling shutter door automatic opening, closing and stopping system, which aims to solve the problems of single operation mode, limited opening and closing positioning accuracy and insufficient safety control capability in the automated control of the rolling shutter door in the prior art.

[0006] A rolling shutter door automatic opening, closing and stopping system, the system comprising:

[0007] a rolling shutter door body and a rolling shutter door motor for driving the rolling shutter door body to lift;

[0008] a rolling shutter door controller, which is electrically connected with the rolling shutter door motor and is used for providing a control signal for realizing opening, closing and stopping actions to the rolling shutter door motor;

[0009] a PLC controller, which comprises an input module and an output module;

[0010] A relay assembly comprising a plurality of relays corresponding to opening, stopping and closing actions respectively, the plurality of relays being connected with the roller shutter door controller;

[0011] A limit detection unit comprising an open-to-limit switch for indicating that the roller shutter door body is in an open position and a close-to-limit switch for indicating that the roller shutter door body is in a closed position, the limit detection unit being connected with the input module of the PLC controller;

[0012] A trigger signal unit connected with the PLC controller for providing an opening, closing or stopping control instruction signal to the PLC controller;

[0013] The PLC controller is configured to control the corresponding relay of the relay assembly to act according to the control instruction signal provided by the trigger signal unit and the limit signal provided by the limit detection unit, so that the roller shutter door controller controls the roller shutter door motor to realize the opening, closing and stopping of the roller shutter door body.

[0014] In the above scheme, the relay assembly comprises an opening relay KA1, a stopping relay KA2 and a closing relay KA3;

[0015] The normally open contacts of KA1, KA2 and KA3 are respectively electrically connected with the opening terminal, the stopping terminal and the closing terminal of the roller shutter door controller,

[0016] The common terminals of KA1, KA2 and KA3 are electrically connected with the common terminal of the roller shutter door controller;

[0017] The output module of the PLC controller has a plurality of output terminals, which are respectively electrically connected with the coil terminals of KA1, KA2 and KA3 for controlling the attraction or disconnection of each relay.

[0018] In the above scheme, the roller shutter door controller comprises L, N and PE terminals for external AC power supply;

[0019] The L terminal is electrically connected with the live wire of the external AC power supply via a circuit breaker QF1, the N terminal is connected with the zero line of the external AC power supply, and the PE terminal is used for grounding, the roller shutter door controller outputs a control power supply for driving the motor to operate after receiving the control signal from KA1, KA2 and KA3.

[0020] In the above scheme, the roller shutter door motor has a plurality of motor terminals, and the opening, closing or stopping signal output terminals of the roller shutter door controller are respectively connected with the motor terminals to drive the motor to realize forward rotation, reverse rotation or power-off stopping.

[0021] Optionally, the opening-to-position switch and the closing-to-position switch both have a common terminal and a signal terminal.

[0022] The common terminal is connected to a negative electrode of a direct current power supply, the signal terminal of the opening-to-position switch is connected to a first input point of a PLC input module, the signal terminal of the closing-to-position switch is connected to a second input point of the PLC input module, and the PLC controller is configured to determine a current position state of the roller shutter door body when receiving a corresponding limit signal.

[0023] Optionally, the trigger signal unit comprises at least one of a remote controller receiving module, a wall button module and a remote control module.

[0024] The remote controller receiving module comprises a wireless receiver connected to the PLC input module.

[0025] The wall button module comprises an up button, a down button and a stop button, which are respectively connected to different input points of the PLC input module.

[0026] The remote control module comprises a communication interface in communication connection with the PLC controller, configured to receive opening, closing or stopping control instructions sent by an external control system.

[0027] Optionally, the PLC controller stores a control program for controlling the action of the roller shutter door, and the control program comprises:

[0028] an opening program segment configured to output an opening relay control signal when receiving an opening instruction;

[0029] a closing program segment configured to output a closing relay control signal when receiving a closing instruction;

[0030] a stopping program segment configured to output a stopping relay control signal when receiving a stopping instruction; and

[0031] interlocking logic configured to shield the closing output in the opening operation state, shield the opening output in the closing operation state, and shield the opening and closing outputs when receiving the stopping instruction.

[0032] Optionally, the PLC controller has a power-on initialization program segment, configured to determine an initial position of the roller shutter door body according to the detection states of the opening-to-position switch and the closing-to-position switch when the PLC controller is powered on or restarted, and make the output terminals of the PLC output module in an output state corresponding to the initial position.

[0033] In the above scheme, optionally, the lifting circuit and the descending circuit of the roller shutter door motor are connected with the external alternating current power source via contactor KM1 and contactor KA4 respectively, and the control ends of the contactor KM1 and the contactor KA4 are connected with the control output ends of the roller shutter door controller for controlling the lifting and descending of the roller shutter door respectively.

[0034] In the above scheme, optionally, the system further comprises a vehicle detection unit for generating a detection signal when a vehicle or equipment enters or leaves the roller shutter door area, and connecting with the PLC controller in a wireless or wired manner, so that the PLC controller triggers the opening or closing action of the roller shutter door according to the detection signal.

[0035] Compared with the prior art, the present application has at least the following beneficial effects:

[0036] Based on further analysis and research on the problems of the prior art, it is realized that the prior art has the problems of single operation mode, limited positioning accuracy and insufficient safety control capability in the automatic control of the roller shutter door. By establishing a complete and clear control link between the roller shutter door motor, the roller shutter door controller, the PLC controller, the relay assembly, the limit detection unit and the trigger signal unit, the opening, closing and stopping actions of the roller shutter door can be controlled and executed under the condition of multiple signal inputs, thereby overcoming the limitations of the traditional roller shutter door which only relies on a single button or manual operation. The PLC controller can establish a logical judgment relationship between different action instructions and the state of the door body by collecting instructions from the trigger signal unit through the input module and combining the position signals obtained by the limit detection unit, so as to ensure that the roller shutter door only executes the corresponding action under safe and allowed conditions, effectively avoiding the safety hazards such as hitting the top, over-winding or reverse action caused by inaccurate position judgment in the traditional system. At the same time, the PLC output module outputs opening, closing and stopping control signals that do not interfere with each other to the roller shutter door controller through the relay assembly, so that the action switching is more accurate and reliable, avoiding the misoperation of the traditional roller shutter door system when switching instructions due to the simple control chain. Through the above configuration, not only the diversification of the operation mode is realized, but also the position recognition ability and the safety of action control during the operation of the roller shutter door are improved, thereby effectively solving the problems of single operation mode, insufficient positioning accuracy and weak safety control capability in the background technology. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 The principle block diagram of the roller shutter door automatic opening and closing system provided by one embodiment of the present application is shown in the figure;

[0038] Figure 2 One of the control wiring diagrams of the opening and closing provided by one embodiment of the present application is shown in the figure;

[0039] Figure 3The second switch stop control wiring diagram provided for an embodiment of the present application;

[0040] Figure 4 The PLC module configuration diagram provided for an embodiment of the present application;

[0041] Figure 5 The structural body program code schematic diagram provided for an embodiment of the present application;

[0042] Figure 6 The first schematic diagram of the function block adding operation process provided for an embodiment of the present application;

[0043] Figure 7 The first schematic diagram of the function block adding operation process provided for an embodiment of the present application;

[0044] Figure 8 The roll-up door opening ladder diagram provided for an embodiment of the present application;

[0045] Figure 9 The roll-up door opening to the in-place state feedback ladder diagram provided for an embodiment of the present application;

[0046] Figure 10 The roll-up door automatic power-on ladder diagram after the PLC restart provided for an embodiment of the present application;

[0047] Figure 11 The roll-up door stop ladder diagram provided for an embodiment of the present application. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0049] In the description of the present application: unless otherwise specified, the meaning of "multiple" is two or more. The terms "first", "second", "third" and the like in the present application are intended to distinguish the objects referred to, and do not have special meanings in the technical connotation aspect (for example, it should not be understood as emphasizing the importance or order, etc.).

[0050] In one embodiment, as shown in Figure 1 a roll-up door automatic opening and closing system is provided, the system comprising: a roll-up door body and a roll-up door motor for driving the roll-up door body to lift;

[0051] A roller shutter door controller, which is electrically connected to the roller shutter door motor, is used to provide control signals to the roller shutter door motor to realize opening, closing and stopping actions;

[0052] The PLC controller includes an input module and an output module.

[0053] A relay assembly, comprising multiple relays for corresponding to the three actions of opening, stopping, and closing, wherein the multiple relays are connected to the roller shutter door controller;

[0054] The limit detection unit includes an open-position switch for indicating that the roller shutter door is in the open position and a closed-position switch for indicating that the roller shutter door is in the closed position. The limit detection unit is connected to the input module of the PLC controller.

[0055] A trigger signal unit, which is connected to the PLC controller, is used to provide the PLC controller with control command signals for opening, closing, or stopping;

[0056] The PLC controller is configured to control the corresponding relays of the relay assembly to operate according to the control command signals provided by the trigger signal unit and the limit signals provided by the limit detection unit, so that the roller shutter controller controls the roller shutter motor to open, close and stop the roller shutter door.

[0057] In this embodiment, the automatic opening and closing system for the roller shutter door mainly includes the roller shutter door body, the roller shutter door motor, the roller shutter door controller, the PLC controller, relay components, limit detection units, and trigger signal units. The roller shutter door body adopts a conventional roller shutter structure, and its winding and unfolding are achieved by the roller shutter door motor. The roller shutter door motor can be a single-phase or three-phase AC motor, and its electrical terminals are connected to the corresponding open, close, and stop signal output terminals of the roller shutter door controller to perform corresponding forward, reverse, or stop actions.

[0058] The roller shutter door controller, as the system's execution drive unit, has internal control terminals for receiving open, close, and stop signals. The controller is powered by an external AC power supply and typically includes an L terminal, an N terminal, and a PE grounding terminal. In this embodiment, the L terminal is connected to the external power supply's live wire via a circuit breaker, the N terminal is connected to the neutral wire, and the PE terminal is used for protective grounding to ensure the electrical safety of the entire drive circuit. When the open terminal of the roller shutter door controller is connected to its common terminal, its internal drive circuit outputs power for the motor's forward rotation; when the close terminal is connected to the common terminal, it outputs power for the motor's reverse rotation; and when the stop terminal is connected, it de-energizes and stops the motor.

[0059] The PLC controller, as the core logic processing unit of the system, has input and output modules used to acquire external signals and drive relay components, respectively. In this embodiment, an electrical connection is established between the PLC input module and the limit detection unit. The signal terminal of the open-position switch is connected to the first input point of the PLC input module, and the signal terminal of the closed-position switch is connected to the second input point; the common terminal of both is connected to the negative terminal of the DC power supply. The PLC output module contains multiple output terminals, which are connected to the coil terminals of the open, stop, and close relays, respectively, enabling the PLC to control the activation and deactivation of the corresponding relays according to the logic output of the control program.

[0060] The relay assembly serves as an isolation unit between the PLC and the roller shutter door controller, including an open relay KA1, a stop relay KA2, and a close relay KA3. Each relay has a coil terminal and at least one normally open contact. When the PLC output module applies voltage to the coils of KA1, KA2, and KA3, the relays are energized, and their normally open contacts close, thereby connecting the open, stop, or close terminal of the roller shutter door controller to a common terminal, causing the controller to output the corresponding motor drive state.

[0061] The trigger signal unit can be selected from at least one of a remote control receiver module, a wall button module, or a remote control module, depending on the actual application requirements. The remote control module converts the code triggered by the remote control buttons into a level signal recognizable by the PLC via a wireless receiver; the wall button module provides on, off, and stop commands via physical buttons; and the remote control module sends commands from the host computer system via a communication line to achieve intelligent linkage. In this embodiment, all these signal units are connected to the PLC input module to trigger the action flow of the PLC control program.

[0062] In this embodiment, the PLC internally sets up a control program, including an opening program segment, a closing program segment, a stop program segment, and interlock logic. The interlock logic is used to ensure that the system will not output opening and closing signals simultaneously, and to ensure that the opening and closing signals are blocked when a stop signal is received, thereby achieving safe state switching. The PLC can also determine the position of the roller shutter door by reading the current state of the open and closed switches when powered on or restarted, and automatically initialize the PLC output to avoid malfunctions.

[0063] In actual system deployment, the vehicle detection unit can be equipped with a wireless geomagnetic detector, an infrared beam detector, or an underground pressure switch, etc., to determine whether a vehicle or equipment is in the operating area of ​​the roller shutter door. When the output signal of the detection unit changes and is transmitted to the PLC, the PLC controller can automatically trigger the opening or closing process of the roller shutter door according to the preset logic, thereby realizing unmanned linkage control.

[0064] Through the above configuration, this embodiment realizes the complete hardware structure and signal logic of the automatic opening and closing system for roller shutter doors, enabling the roller shutter door to achieve safe, reliable, interlocked, and PLC-controlled opening and closing actions under various triggering methods.

[0065] This system uses a PLC controller as the core logic unit, combined with a remote control receiver module, a wall button module, and a remote control module, enabling the roller shutter door to accept open, close, and stop commands in multiple ways. This breaks through the limitation of the single operation mode of traditional roller shutter door control systems, thereby enhancing the system's adaptability and control flexibility.

[0066] The system achieves real-time acquisition of the roller shutter door's position status by setting open and closed position switches at the upper and lower limits of the door body, respectively, and inputting their signals into the PLC. The PLC performs logical judgments based on the limit signals to ensure that the roller shutter door only executes the corresponding open or close command when it is not in the correct position, thereby avoiding the problems of insufficient positioning accuracy and inability to adjust stopping deviation in traditional roller shutter doors.

[0067] The system employs open, stop, and close relays, along with interlocking logic to ensure the exclusive nature of open and close actions. This prevents the system from experiencing simultaneous output of open and close commands under any circumstances. Upon receiving a stop command, all action outputs are immediately disconnected, giving the stop command the highest priority and enhancing system safety during operation. Furthermore, the roller shutter door controller is connected to an external power supply via a circuit breaker and is equipped with a grounding terminal, further improving the overall electrical safety of the system.

[0068] The system described in this embodiment effectively solves the problems of "single operation mode, insufficient positioning accuracy, and weak safety control capability" in the background technology, and realizes an automatic opening and closing scheme for roller shutter doors with multi-signal triggering, accurate positioning, and safety interlock control.

[0069] In this embodiment, as Figure 2 and Figure 3 As shown, the relay assembly includes an open relay KA1, a stop relay KA2, and an off relay KA3;

[0070] The normally open contacts of KA1, KA2, and KA3 are electrically connected to the open, stop, and close terminals of the roller shutter door controller, respectively.

[0071] The common terminals of KA1, KA2, and KA3 are electrically connected to the common terminal of the roller shutter door controller;

[0072] The output module of the PLC controller has multiple output terminals, which are electrically connected to the coil terminals of KA1, KA2, and KA3 respectively, and are used to control the activation or deactivation of each relay.

[0073] In this embodiment, the roller shutter door controller includes an L terminal, an N terminal, and a PE terminal for connecting to an external AC power source;

[0074] The L terminal is electrically connected to the live wire of the external AC power supply via the circuit breaker QF1, the N terminal is connected to the neutral wire of the external AC power supply, the PE terminal is used for grounding, and the roller shutter door controller outputs control power to drive the roller shutter door motor after receiving control signals from KA1, KA2, and KA3.

[0075] In this embodiment, the roller shutter door motor has multiple motor terminals, and the open, close, or stop signal output terminals of the roller shutter door controller are respectively connected to the motor terminals to drive the motor to achieve forward rotation, reverse rotation, or power-off stop.

[0076] In this embodiment, both the open and closed switches have a common terminal and a signal terminal.

[0077] The common terminal is connected to the negative terminal of the DC power supply, the signal terminal of the open position switch is connected to the first input point of the PLC input module, the signal terminal of the closed position switch is connected to the second input point of the PLC input module, and the PLC controller is used to determine the current position state of the roller shutter door body when receiving the corresponding limit signal.

[0078] In this embodiment, the trigger signal unit includes at least one of a remote control receiver module, a wall button module, and a remote control module;

[0079] The remote control receiver module includes a wireless receiver connected to the PLC input module;

[0080] The wall button module includes an up button, a down button, and a stop button, which are connected to different input points of the PLC input module.

[0081] The remote control module includes a communication interface that connects to the PLC controller to receive on / off or stop control commands sent by the external control system.

[0082] In this embodiment, the PLC controller stores a control program for controlling the operation of the roller shutter door, the control program including:

[0083] The door opening program segment used to output the door opening relay control signal when a door opening command is received;

[0084] A door closing program segment used to output a door closing relay control signal when a door closing command is received;

[0085] A stop program segment used to output a stop relay control signal when a stop command is received;

[0086] And interlocking logic for blocking the closing output when the door is open, blocking the opening output when the door is closed, and blocking the opening and closing outputs when a stop command is received.

[0087] In this embodiment, the PLC controller has a power-on initialization program segment, which is used to determine the initial position of the roller shutter door body according to the detection status of the open and closed switches when the PLC controller is powered on or restarted, and to make the output terminal of the PLC output module in an output state corresponding to the initial position.

[0088] In this embodiment, the rising and falling circuits of the roller shutter door motor are connected to an external AC power source via contactors KM1 and KA4, respectively. The control terminals of contactors KM1 and KA4 are connected to the control output terminals of the roller shutter door controller for controlling the rising and falling of the roller shutter door.

[0089] In this embodiment, the system further includes a vehicle detection unit, which generates a detection signal when a vehicle or equipment enters or leaves the roller shutter door area, and connects to the PLC controller wirelessly or via wired means, so that the PLC controller triggers the opening or closing action of the roller shutter door based on the detection signal.

[0090] In this embodiment, as Figures 4-11 As shown, this embodiment applies to the automatic roller shutter door opening and closing system of the pre-positioned container for an emergency response robot. When the vehicle needs to automatically drive out of the pre-positioned container, a wireless signal is transmitted to the control system, causing the motor to drive the roller shutter door to rise. After detecting that the vehicle has completely moved out of the safe distance, the door automatically closes. The design fully considers precise positioning and safety protection.

[0091] Currently, no airport terminal uses this design. Through ingenious mechanical design, it can operate stably. The precise coordination of components ensures smooth and reliable operation, thus realizing the automatic opening and closing system technology for roller shutter doors.

[0092] Roller shutters are primarily driven by a motor, equipped with a control system to achieve opening, closing, and stopping functions. This control system consists of a controller and an actuator, which regulates the motor's current to control the opening, stopping, and closing of the roller shutter. When an operation command is received, the motor starts working, driving the roller shutter to rise and fall. When the designated position is reached, the control system automatically detects and stops the roller shutter.

[0093] The motor is the core component for the movement of the roller shutter door. The forward and reverse rotation of the motor controls the door's ascent and descent. The motor is equipped with sophisticated sensors that detect the door's position and operating status. When the door reaches the preset position, the sensor sends a signal to the control system. Based on this signal, the control system stops the motor, thus achieving precise positioning of the roller shutter door.

[0094] The control system is one of the core components of a roller shutter door. It is responsible for receiving operating commands and controlling the motor's operation. The control system has multiple functions, such as remote control, manual operation, and automatic sensing. Through different operating methods, flexible control of the roller shutter door can be achieved. At the same time, the control system also has safety protection functions, such as automatic stopping upon obstacle detection and overload protection, ensuring the safety and stability of the roller shutter door's operation.

[0095] This embodiment of the roller shutter door offers multiple operation methods, including manual control via remote control, remote control, and touchscreen control. Furthermore, the roller shutter door features smooth operation, low noise, and a long service life. Its precise control system and stable drive mechanism ensure the accuracy and reliability of the roller shutter door during operation.

[0096] The principle behind the up-and-down movement of roller shutters is primarily based on the drive of a motor and the control system. The motor drives the roller shutter to rise and fall by reversing its direction, while the control system receives operating commands and controls the motor's operation, thereby achieving precise positioning and safety protection for the roller shutter.

[0097] Detailed implementation: This solution integrates three major functions: manual control with remote control, wall switch control, and remote system control, ensuring flexible response in different scenarios.

[0098] First and foremost, manual control via remote control is one of the most basic and crucial functions of roller shutter doors. The remote control communicates wirelessly with the roller shutter door controller to achieve remote control. The remote control converts button commands into wireless signals and transmits them. The controller receives these signals, converts them into electrical signals, and then controls the movement of the roller shutter door.

[0099] Secondly, wall-mounted control switches provide a more convenient way to operate the roller shutter door. Manual control buttons are designed on both sides of the roller shutter door or inside the control box. These buttons pair wirelessly with the roller shutter door controller, and once pairing is successful, they can control the roller shutter door's raising, lowering, and stopping. These buttons are made of durable materials to ensure reliability over long-term use. At the same time, considering operational safety, the buttons are designed with anti-accidental touch functions to avoid the risks of accidental operation. Users only need to press a light button to operate the roller shutter door accordingly.

[0100] Finally, remote system control is a major highlight of this solution. Utilizing a control system (PLC, controller, etc.), remote operation is achieved by connecting to the roller shutter door motor control circuit via communication lines (such as network cables, wireless signals, etc.). Through this advanced control system, users can remotely control the roller shutter door using a remote control and software. No matter where the user is, they can easily check the status of the roller shutter door and perform corresponding operations with a simple touch.

[0101] In terms of safety, this solution fully considers various potential risks. We have designed limit switches for the roller shutter door; when the roller shutter door reaches the predetermined position, the system will automatically stop operating to avoid damage caused by overshoot. In addition, the control system also has safety protection measures such as current overload protection and overtemperature protection to ensure the safe and stable operation of the roller shutter door during long-term use.

[0102] Normal control process: The roller shutter door motor, roller shutter door controller, relays, upper and lower limit switches, and PLC together constitute its electrical system. All parts work together to ensure the stable operation of the roller shutter door.

[0103] The motor serves as the power source, driving the door to rise and fall in both forward and reverse directions. Relays, acting as electrical control devices, control the on / off state of the motor circuit, thus opening and closing the door. Upper and lower limit switches monitor the door's position; when the door reaches its upper or lower limit, the limit switches activate, cutting off the motor power via the relays to prevent the door from exceeding the predetermined range. The PLC, acting as the system's "brain," pre-programs the control sequence, receives external signals (such as button and remote control commands), and sends instructions to the relays, thereby controlling the motor's operation. The entire system operates seamlessly through electrical connections, achieving automated and safe operation of the roller shutter door.

[0104] Circuit design concept: The roller shutter door motor is powered by the roller shutter door controller (220V). The roller shutter door controller has four points: switch, stop, and open. The switch, stop, and open are each connected in parallel with the open point of a relay (named roller shutter door open relay KA1, roller shutter door stop relay KA2, and roller shutter door close relay KA3). The common terminal of the roller shutter door controller is connected in parallel with the common terminal of the three switch, stop, and open relays, so that the signal forms a loop for transmission.

[0105] The PLC uses a 24V power supply and has an external 32-input module and a 16-output module.

[0106] The input module primarily receives the position signal from the roller shutter door. Input module SS provides a 24V+ signal. The roller shutter door controller has open / closed positions and a common terminal, with the common terminal providing a 24V- signal. The open position signal is connected to input module IX0.6 of the PLC, and the closed position signal is connected to input module IX0.7 of the PLC. When the roller shutter door is in the open or closed position, it sends a position signal back to the PLC.

[0107] The output module primarily controls the opening, closing, and stopping of the roller shutter door. The output module's COM port provides a 24V+ voltage. QX1.1 connects to A2 of the roller shutter door opening relay coil, QX1.2 connects to A2 of the roller shutter door stopping relay coil, and QX1.3 connects to A2 of the roller shutter door closing relay coil. When the PLC issues an opening signal command, the roller shutter door opening relay coil engages, changing from a normally open to a normally closed contact. The roller shutter door controller receives this signal, the roller shutter door motor activates, and the roller shutter door opens. Once the roller shutter door is fully open, it sends a "fully opened" signal back to the PLC.

[0108] The PLC program design concept in this embodiment is as follows:

[0109] Three-state control: The door has three states - open, closed, and stopped.

[0110] Instant response: It can immediately respond to stop commands whether the door is opening or closing; it can also respond to closing commands during the opening process, and vice versa.

[0111] Safety first: Stop signals usually have the highest priority to ensure safety.

[0112] The rolling shutter door can be opened, closed, and stopped via a host computer, and the opening, closing, and stopping of the rolling shutter door can be fed back to the host computer.

[0113] The program needs to provide feedback on whether the roller shutter door is fully open or fully closed.

[0114] The roller shutter door automatically powers on after the PLC restarts.

[0115] Trigger signal generation: transmitted wirelessly.

[0116] Control signal processing: When the PLC receives the door opening / closing stop command, it automatically executes the program and the motor moves.

[0117] Fail-safe mode: The design should follow the "fail-safe" principle. For example, when the system loses power, the roller shutter should be able to be manually opened or maintain its current position, rather than automatically falling.

[0118] Operation process: Vehicle triggers wireless signal - control system starts motor - roller shutter door rises - vehicle moves away from safe distance - door closes automatically.

[0119] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A roller shutter automatic opening and closing system, characterized in that, The system comprises a roller shutter door body and a roller shutter door motor for driving the roller shutter door body to lift; A roller shutter door controller is electrically connected with the roller shutter door motor, for providing a control signal for realizing opening, closing and stopping actions to the roller shutter door motor; A PLC controller comprises an input module and an output module; A relay assembly comprises a plurality of relays for corresponding to the three actions of opening, stopping and closing respectively, and the plurality of relays are connected with the roller shutter door controller; A limit detection unit comprises an open-to-position switch for indicating that the roller shutter door body is in an open position and a close-to-position switch for indicating that the roller shutter door body is in a closed position, and the limit detection unit is connected with the input module of the PLC controller; A trigger signal unit is connected with the PLC controller, for providing an open, close or stop control instruction signal to the PLC controller; The PLC controller is configured to control the corresponding relay of the relay assembly to act according to the control instruction signal provided by the trigger signal unit and the limit signal provided by the limit detection unit, so that the roller shutter door controller controls the roller shutter door motor to realize the opening, closing and stopping of the roller shutter door body.

2. The automatic opening and closing system for rolling door according to claim 1, characterized in that, The relay assembly comprises an opening relay KA1, a stopping relay KA2 and a closing relay KA3; The normally open contacts of the KA1, KA2 and KA3 are electrically connected with the open terminal, the stop terminal and the close terminal of the roller shutter door controller respectively, The common terminals of the KA1, KA2 and KA3 are electrically connected with the common terminal of the roller shutter door controller; The output module of the PLC controller has a plurality of output terminals, which are respectively electrically connected with the coil terminals of the KA1, KA2 and KA3, for controlling the attraction or disconnection of each relay.

3. The automatic opening and closing system for rolling door according to claim 1, characterized in that, The roller shutter door controller comprises L, N and PE terminals for external AC power supply; The L terminal is electrically connected with the live wire of the external AC power supply via a circuit breaker QF1, the N terminal is connected with the zero line of the external AC power supply, and the PE terminal is used for grounding. After receiving the control signal from the KA1, KA2 and KA3, the roller shutter door controller outputs a control power supply to the roller shutter door motor to drive the motor to operate.

4. The automatic opening and closing system for rolling door according to claim 1, characterized in that, The roller shutter door motor has a plurality of motor connection terminals, and the open, close or stop signal output terminals of the roller shutter door controller are respectively connected with the motor connection terminals correspondingly, so as to drive the motor to realize forward rotation, reverse rotation or power-off stopping.

5. The automatic opening and closing system for rolling door according to claim 1, characterized in that, The open-to-position switch and the close-to-position switch both have a common terminal and a signal terminal, The common terminal is connected with the negative electrode of the DC power supply, the signal terminal of the open-to-position switch is connected to the first input point of the PLC input module, and the signal terminal of the close-to-position switch is connected to the second input point of the PLC input module. The PLC controller is used for determining the current position state of the roller shutter door body when receiving the corresponding limit signal.

6. The automatic opening and closing system for rolling door according to claim 1, characterized in that, The trigger signal unit comprises at least one of a remote controller receiving module, a wall button module and a remote control module; The remote controller receiving module comprises a wireless receiver connected with the PLC input module. The wall button module includes an up button, a down button and a stop button, which are connected with different input points of the PLC input module respectively; The remote control module includes a communication interface which is connected with the PLC controller and is used for receiving the open, close or stop control instructions sent by the external control system.

7. The automatic opening and closing system for rolling door according to claim 1, characterized in that, The PLC controller stores a control program for controlling the operation of the roller shutter door, and the control program includes: an open program segment for outputting an open relay control signal when receiving an open door instruction; a close program segment for outputting a close relay control signal when receiving a close door instruction; a stop program segment for outputting a stop relay control signal when receiving a stop instruction; and an interlocking logic for shielding the close output in the open door operation state, shielding the open output in the close door operation state and shielding the open and close outputs when receiving the stop instruction.

8. The automatic opening and closing system for rolling door according to claim 1, characterized in that, The PLC controller has a power-on initialization program segment for determining the initial position of the roller shutter door body according to the detection state of the open-to-position switch and the close-to-position switch when the PLC controller is powered on or restarted, and making the output end of the PLC output module in the output state corresponding to the initial position.

9. The automatic opening and closing system for rolling door according to claim 1, characterized in that, The up circuit and the down circuit of the roller shutter door motor are connected with the external AC power source via the contactor KM1 and the contactor KA4 respectively, and the control ends of the contactor KM1 and the contactor KA4 are connected with the control output ends of the roller shutter door controller for controlling the up and down of the roller shutter door respectively.

10. The automatic opening and closing system for rolling door according to claim 1, characterized in that, The system further includes a vehicle detection unit for generating a detection signal when a vehicle or equipment enters or leaves the roller shutter door area, and connecting with the PLC controller through wireless or wired mode, so that the PLC controller triggers the opening or closing action of the roller shutter door according to the detection signal.

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