A crane automatic boarding door access control system

Abstract

A kind of crane automatic boarding door access control system, it is related to crane technical field, including installation in boarding platform automatic door, gravity sensing pedal being arranged at its outside, control terminal in cab and interlock control module being integrated in terminal.The gravity sensing pedal is constituted by flat plate and bottom pressure sensor, only triggers signal when continuously bearing effective load;Control terminal prompts driver after receiving signal, and can linkage crane deceleration or stop, simultaneously, through interlock mechanism, it is forced to lock crab operation when door opens.The system is also preferably integrated timer to filter transient false touch, additional emergency button realizes emergency stop and door opening, and is equipped with video intercom device, supports driver remote confirmation personnel identity and state.The utility model realizes the automation, safety and closed-loop management of boarding process, effectively avoids non-planned stop and personnel falling risk, improves operation safety and man-machine cooperation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and in particular to an automatic crane boarding gate access control system. Background Technology

[0002] In existing crane operating systems, boarding doors typically employ a mechanical, manual opening and closing mechanism, or are equipped with only simple limit switches and interlocking devices. While this design can forcibly cut off the crane's power supply when the door is opened, providing basic safety protection, it lacks an active sensing and interaction mechanism for boarding behavior. When personnel need to board, they must contact the operator by knocking on the door, shouting, or using external communication tools (such as walkie-talkies), which is not only inefficient but also prone to communication failure in noisy, long-distance, or obstructed working conditions.

[0003] More seriously, if passengers forcibly open the boarding door while the crane is in operation, it will directly trigger the limit switch, causing the equipment to stop urgently, resulting in unplanned interruption and affecting the continuity of operations. If the operator does not notice that someone is boarding or has not completely disembarked before starting the equipment, it may cause people to fall, get pinched, or even suffer injuries or fatalities.

[0004] Furthermore, although some cranes have been equipped with video surveillance or intercom systems, these functions are mostly independently configured and do not form a closed-loop linkage with the door control and operation control systems. This makes it difficult to achieve coordinated control of boarding requests, identity verification, equipment status adjustments, and door operations. Therefore, existing technologies have significant shortcomings in terms of security, automation, and human-machine collaboration efficiency during the boarding process. There is an urgent need for an automatic boarding door access control system that can proactively sense personnel intentions, intelligently coordinate equipment status, and ensure a closed-loop operation.

[0005] For example, Chinese patent (publication number CN220933526U) discloses a crane loading and unloading safety access control system. This patent includes a boarding door, a loading / unloading door control box, a driver's cab response client, and a door closing detection switch. The loading / unloading door control box is equipped with a request to board or alight. The boarding door is fitted with an electromagnetic lock and a door closer. The door closing detection switch is connected to the loading / unloading door control box. The electromagnetic lock, sensor components, and driver's cab response client are also connected to the loading / unloading door control box. However, in practical use, this access control system has been found to be inconvenient. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model discloses an automatic boarding gate access control system for cranes.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0008] An automatic crane boarding gate access control system includes:

[0009] Automatic doors are installed on the boarding platform;

[0010] Gravity-sensing pedal, installed on the outside of the automatic door; used to send signals requesting the door to open or close.

[0011] A control terminal is installed in the crane operator's cab; the control terminal is connected to the automatic door control system to control the opening and closing of the automatic door; the gravity sensor pedal is connected to the control terminal signal system to send an opening and closing request signal to the control terminal.

[0012] The interlocking control module, integrated into the control terminal, is used to control the crane trolley to lock when the automatic door is opened.

[0013] Preferably, the gravity-sensing pedal includes:

[0014] Flat panels are laid on the boarding platform floor;

[0015] The pressure sensor is installed on the bottom of the flat panel.

[0016] Preferably, the control terminal integrates a timer, which is used to detect the duration for which the gravity-sensing pedal is continuously triggered.

[0017] Preferably, an emergency button is installed on the outside of the automatic door, and the emergency button is connected to the control terminal signal.

[0018] Preferably, it also includes a video intercom device, the main unit of which is installed in the crane cab and the extension unit is installed outside the automatic door; the control terminal is connected to the video intercom device.

[0019] By adopting the technical solution described above, this utility model has the following beneficial effects:

[0020] (1) This utility model has a simple structure. By setting an automatic door, a gravity-sensing pedal, and a control terminal at the entrance of the boarding platform, a closed-loop boarding access control system is constructed. The automatic door adopts an electric drive mechanism in conjunction with an electromagnetic or mechanical locking device to realize remote controllable opening and closing, replacing the traditional manual operation method and improving boarding efficiency and automation level. The gravity-sensing pedal consists of a flat plate and a pressure sensor. Its surface is flush with the ground, which makes it easy for people to stand naturally. The pressure sensor only outputs a signal when it bears a load exceeding a preset threshold, effectively avoiding false triggering caused by falling foreign objects or slight vibrations, and improving recognition accuracy.

[0021] (2) As the core of the system, the control terminal of this utility model receives the request signal from the gravity sensor pedal and can issue a boarding or disembarking prompt to the driver. It can also automatically send deceleration or stop commands according to the current operating status of the crane to ensure that the boarding and disembarking process is carried out under safe conditions. At the same time, the system introduces an interlocking control mechanism to forcibly lock the crane trolley operation function during the opening of the automatic door to prevent accidental start-up of the equipment and safety accidents. Only after confirming that the door is completely closed and locked will the interlock be released and the normal operation of the equipment be restored. This design fundamentally solves the safety hazards such as unplanned shutdown and personnel falls caused by the lack of active communication capability of traditional boarding doors, and realizes a strong correlation between boarding behavior and equipment operating status.

[0022] (3) The present invention further integrates a timer module into the control terminal to determine the duration of the trigger signal of the gravity sensing pedal. Only when the signal lasts for more than 5 to 10 seconds is it considered a valid request, thereby effectively filtering out instantaneous interference and significantly improving the system's anti-accidental touch capability and operational stability in complex industrial environments.

[0023] (4) This utility model further adds an emergency button and connects it to the control terminal via hard wiring. In case of an emergency, personnel can manually trigger the button, and the system will immediately perform an emergency shutdown and open the automatic door, providing a reliable passage for emergency evacuation or rescue and enhancing the safety redundancy of the system.

[0024] (5) This utility model further adds a video intercom device, with the main unit located in the driver's cab and the sub-unit installed on the outside of the automatic door. When a boarding / disembarking request is received, the system automatically activates the video intercom function, allowing the driver to confirm the identity, intent, and safety status of the personnel through real-time video and voice interaction. This function overcomes the limitation of pure sensor signals not being able to provide visual verification, and is especially suitable for nighttime, inclement weather, or scenarios with obstructed vision, effectively preventing impersonation or misjudgment of disembarking completion, and strengthening the safety assurance capability of human-machine collaboration. Attached Figure Description

[0025] Figure 1 This is a system block diagram of the present invention;

[0026] Figure 2 This is a schematic diagram of the gravity-sensing pedal.

[0027] In the diagram: 1. Automatic door; 2. Gravity-sensing pedal; 2-1. Flat panel; 2-2. Pressure sensor; 3. Control terminal; 4. Emergency button; 5. Video intercom device. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. They are only used to facilitate the description of this utility model and to simplify the description, and do not 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 utility model.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "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 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] Example 1:

[0032] Combined with appendix Figures 1-2 An automatic crane boarding gate access control system includes an automatic door 1, a gravity-sensing pedal 2, and a control terminal 3. The automatic door 1 is installed at the entrance of the boarding platform to isolate the crane cab from the external passageway. This automatic door 1 is a commercially available device, employing an electric push rod or motor-driven mechanism to open and close the door, and is equipped with an electromagnetic lock or mechanical locking device to ensure safety when closed. Its electrical control system can receive external control signals to achieve remote opening and closing operations, featuring fast response, stable operation, and low failure rate. It can effectively replace traditional manual door operation, improving the automation level and operational efficiency of the boarding process.

[0033] A gravity-sensing pedal 2 is installed on the ground outside the automatic door 1. This pedal detects whether a person is in the boarding area and sends a signal to request the opening or closing of the automatic door 1 accordingly. Specifically, the gravity-sensing pedal 2 includes a plate 2-1 and a pressure sensor 2-2. The plate 2-1 is laid on the boarding platform floor, with its surface flush with the surrounding ground, facilitating a natural standing position for personnel. At least one pressure sensor 2-2 is fixedly installed at the bottom of the plate 2-1. This pressure sensor 2-2 employs a high-sensitivity strain gauge or piezoelectric structure, capable of outputting an electrical signal when subjected to a load exceeding a set threshold. When a person stands on the plate 2-1 and their weight exceeds the preset threshold, the pressure sensor 2-2 is triggered, generating a valid trigger signal and transmitting it to the control terminal 3. This structural design avoids false triggering caused by slight vibrations or falling foreign objects, improving the accuracy and reliability of the system's identification.

[0034] A control terminal 3 is installed in the crane cab. This control terminal 3 serves as the central processing unit of the entire access control system. It is connected to the drive and locking mechanism of the automatic door 1 via wired or wireless means to send opening and closing commands. At the same time, the gravity sensor pedal 2 is connected to the control terminal 3 via a signal line to transmit the personnel boarding or disembarking request signal to the control terminal 3 in real time.

[0035] When a person needs to board, the requester stands on the gravity-sensing pedal 2. After the pressure sensor 2-2 detects the effective load, it sends a boarding request signal to the control terminal 3. The control terminal 3 then displays the boarding request message on the display interface or audio-visual prompt device in the cab. If the crane trolley is in operation at this time, the control terminal 3 immediately sends a deceleration command to the crane's main control system, gradually reducing the trolley's speed to below a safe level to mitigate potential dynamic risks during boarding. After the driver confirms and agrees to the boarding request, the control terminal 3 further sends a command to completely stop the crane trolley and simultaneously controls the automatic door 1 to open. After the requester enters the cab, the driver confirms that the person is safely in position and then sends a closing command through the control terminal 3, causing the automatic door 1 to close and relock. This process achieves controlled management of the boarding process, effectively preventing unauthorized personnel from entering the operating area and ensuring the safety of equipment and personnel during boarding.

[0036] When personnel need to leave the crane, the operator first controls the automatic door 1 to open via control terminal 3. After the person leaves the automatic door 1 and stands on the gravity-sensing pedal 2, the pressure sensor 2-2 is triggered again, transmitting a departure completion signal to control terminal 3. Control terminal 3 then sends a door-closing request message to the operator. After confirming that the person has completely left the danger zone, the operator controls the automatic door 1 to close via control terminal 3. This mechanism ensures the integrity of the departure process and avoids potential safety hazards in subsequent operations due to the door not closing in time.

[0037] In addition, an interlocking control module is integrated inside the control terminal 3. This interlocking control module is a mature module currently available on the market. This module forms a hard-wired or logical interlocking relationship with the crane's main control system and the automatic door 1. When the automatic door 1 is in the open state, the interlocking control module will forcibly lock the crane's trolley operation function, preventing it from starting or continuing to move; only after the automatic door 1 is completely closed and the locking is confirmed, the interlock is released, and the crane can resume operation.

[0038] This embodiment addresses the problems caused by the lack of active communication in traditional boarding gates: on the one hand, if other personnel attempt to board the crane during operation, the original system cannot actively notify the operator, potentially leading to the personnel forcibly opening the gate, triggering limit switches, and causing unplanned crane shutdowns, disrupting normal operations; on the other hand, if the operator starts the crane before the disembarking personnel have completely left the boarding area, it can easily cause falls or injuries. This system establishes a strong correlation between boarding behavior and equipment operating status, significantly improving operational safety and standardization.

[0039] Example 2:

[0040] Combined with appendix Figure 1 An automatic crane boarding gate access control system differs from Embodiment 1 in that, based on Embodiment 1, the control terminal 3 integrates a timer module. This timer detects the duration for which the gravity-sensing pedal 2 is continuously triggered. The timer starts counting after the pressure sensor 2-2 outputs a valid signal; if the signal persists for a preset threshold (typically set to 5-10 seconds), the control terminal 3 determines it as a valid boarding or disembarking request and executes subsequent prompts and control procedures. If the triggering time is shorter than the threshold, it is considered a false trigger, and the system does not respond. This design, by introducing time-dimensional judgment logic, effectively filters instantaneous or unintentional triggering signals, improves the system's anti-interference capability, and avoids unnecessary equipment downtime or operational interruptions due to false alarms, thereby enhancing the system's stability and practicality in complex industrial environments.

[0041] Example 3:

[0042] Combined with appendix Figure 1An automatic crane boarding gate access control system, based on Embodiment 1 or Embodiment 2, includes an emergency button 4 installed on the outside of the automatic door 1. This emergency button 4 is a commercially available normally open mechanical button with an anti-accidental-touch structure and is connected to the control terminal 3 via hard-wiring. In the event of an emergency (such as personnel injury, equipment malfunction, or obstruction of boarding), the person requesting the emergency button 4 can press it. This button immediately transmits a high-priority signal to the control terminal 3. Upon receiving the signal, the control terminal 3 triggers an audible and visual alarm and displays an emergency warning message in the driver's cab to alert the driver. Simultaneously, it immediately sends an emergency stop command to the crane's main control system, forcibly stopping all movement of the trolley, crane, and hoisting mechanism, and simultaneously controls the automatic door 1 to open for rescue or evacuation. This function adds an emergency response channel to the system, ensuring personnel safety even in the event of conventional communication or sensor failure, thus improving overall safety redundancy.

[0043] Example 4:

[0044] Combined with appendix Figure 1 An automatic crane boarding gate access control system, based on any one of embodiments one through three, further includes a video intercom device 5. This video intercom device 5 is a commercially available, mature product. Its main unit is installed in the crane operator's cab for easy operation and observation by the operator; the secondary unit is installed at an appropriate height outside the automatic door 1, equipped with a camera and microphone / speaker assembly. The control terminal 3 and the video intercom device 5 are connected via a communication interface. When the control terminal 3 receives a request signal from the gravity-sensing pedal 2 or the emergency button 4, it automatically activates the video intercom device 5. The main unit screen instantly displays the real-time image from the secondary unit. The operator can confirm the requester's identity, status, and surrounding environment through the screen, and verify the boarding intent or confirm whether the departing personnel have safely evacuated via voice intercom. This function compensates for the lack of visual and voice interaction in the pure signal-triggered mode, and is particularly suitable for nighttime, rainy / foggy weather, or obstructed visibility conditions. It effectively prevents impersonation during boarding and misjudgment of departure completion, further strengthening the human-machine collaborative safety mechanism.

[0045] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and are intended to include all changes that fall within the meaning and scope of equivalents within this utility model.

Claims

1. An automatic crane boarding gate access control system, characterized in that, include: Automatic door (1), installed on boarding platform; Gravity-sensing pedal (2) is installed on the outside of the automatic door (1); Used to send signals requesting the door to open or close; The control terminal (3) is installed in the crane cab; the control terminal (3) is connected to the automatic door (1) to control the opening and closing of the automatic door (1); The gravity-sensing pedal (2) is connected to the control terminal (3) and sends an open / close request signal to the control terminal (3); The interlocking control module is integrated into the control terminal (3); it is used to control the crane trolley to lock when the automatic door (1) is opened.

2. The crane automatic door access system of claim 1, wherein, The gravity-sensing pedal (2) includes: Flat panel (2-1), laid on the boarding platform floor; Pressure sensor (2-2) is installed on the bottom of the plate (2-1).

3. The crane automatic door access system of claim 1, wherein, The control terminal (3) is integrated with a timer, which is used to detect the duration for which the gravity sensing pedal (2) is continuously triggered.

4. The hoist automatic door access system of claim 1, wherein, An emergency button (4) is installed on the outside of the automatic door (1), and the emergency button (4) is connected to the control terminal (3) via a signal.

5. Crane automatic boarding door access system according to any of claims 1-4, characterized in that It also includes a video intercom device (5), the main unit of which is installed in the crane cab and the extension unit is installed outside the automatic door (1); the control terminal (3) is connected to the video intercom device (5) for control.

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