RFID construction elevator door interlocking device with safety early warning function

Abstract

The utility model discloses an RFID (radio frequency identification) construction elevator door interlocking device with a safety early warning function, belongs to the technical field of construction elevators, and solves the problem that the existing construction elevator door interlocking device cannot determine a floor on which a protective door is not closed. Whether the protective door of the floor is in a closed state or an open state can be judged by judging whether the RFID reader effectively reads the RFID tag information, if the protective doors of all floors are in the closed state, the control system can control the construction elevator to operate normally, and if the protective doors of the floors are in the open state, the control system can control the construction elevator to operate normally. If the protective doors of all floors are closed, the early warning beeper of the corresponding floor gives an early warning and calls the personnel on the floors to close the protective doors, and the operation of the construction elevator can be controlled again until the protective doors of all floors are in the closed state, so that the safety accident of high-altitude falling is avoided, and the safety of the personnel is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of construction elevator technology, specifically to an RFID construction elevator door interlocking device with a safety early warning function. Background Technology

[0002] Construction elevators are essential large-scale mechanical equipment in project construction, enabling rapid vertical transportation of personnel and materials. They transport building materials and workers to designated floors, significantly improving vertical transportation efficiency and shortening project construction cycles. However, with the widespread use of construction elevators, their shortcomings have become increasingly apparent. During operation, construction elevators involve the mixed transport of personnel and materials, operating in harsh environments with numerous uncertainties, posing significant risks. In recent years, construction elevator safety accidents have occurred frequently, with the failure or improper closure of floor safety doors being a major contributing factor. Generally, construction elevator floor safety doors use a full-fence structure, making it difficult to monitor in real time whether each floor safety door is closed during elevator operation. This makes it difficult to ensure that the construction elevator operates in a closed environment, leading to frequent accidents such as falls from heights and mechanical injuries.

[0003] To address the aforementioned issues, a utility model patent with publication number CN217102579U discloses an elevator floor door interlocking device for construction sites. This device includes a door closing sensor connected to the elevator motor signal. When the sensor receives a signal indicating the insertion of a latch, the elevator can move; conversely, if no signal is received, the elevator will stop. While this utility model provides some degree of safety for workers, it cannot pinpoint floors where the safety door is not closed, nor can it provide timely feedback to the corresponding floor. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides an RFID construction elevator door interlocking device with a safety early warning function, which solves the problem that existing construction elevator door interlocking devices cannot determine the floor where the protective door is not closed.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An RFID construction elevator door interlocking device with safety early warning function is provided, including a protective door support frame. Openable door panels are hinged on both sides of the protective door support frame. An RFID reader and an RFID tag with floor information are embedded on the adjacent sides of the two openable door panels. The RFID reader is electrically connected to the construction elevator control system. The construction elevator control system is electrically connected to an early warning call device installed on the protective door support frame.

[0007] The working principle of this solution is as follows: when both operable doors are closed, the RFID reader can read valid floor data from the RFID tags and maintain a stable connection and signal strength within a set time window. When both operable doors are open, the distance between the RFID reader and the RFID tags increases, causing the RFID reader to be unable to recognize the RFID tag signal or the signal strength to decrease. Therefore, the construction elevator control system can determine whether the safety door on a given floor is closed or open by checking whether the RFID reader effectively reads the RFID tag information. If all safety doors are closed, the control system can control the construction elevator to operate normally. If any safety door is open, the warning call button on the corresponding floor will sound an alarm and call personnel to close the safety door. The construction elevator can only be restarted after all safety doors are closed. This solution not only identifies floors with open safety doors by detecting unread RFID tags and issues warning calls for floors with open doors, but also prevents falls from heights and ensures the safety of workers.

[0008] Furthermore, tag slots for securing RFID tags and reader slots for securing RFID readers are respectively provided on adjacent sides of the two openable door panels. The tag slots and reader slots ensure the stable fixation of RFID tags and RFID readers, avoiding misjudgments or failures caused by loosening or displacement of the equipment, thus enhancing the reliability and durability of the device.

[0009] Furthermore, the tag slot and reader slot are located at the same height on both openable door panels. This alignment ensures that the RFID reader can accurately read the information from the RFID tags, avoiding reading failures or misreads caused by inconsistent heights, and improving the accuracy and stability of the device.

[0010] Furthermore, the upper half of both openable door panels is equipped with perforated windows.

[0011] Furthermore, the reader slot is located on the bottom of the openable door panel near the perforated window, and a cable hole is horizontally installed through the reader slot for the cable to pass through. One end of the cable is electrically connected to the RFID reader, and the other end of the cable passes through the cable hole and the bottom of the perforated window, extending along the side of the protective door support frame to be electrically connected to the controller of the construction elevator control system. The perforated window design not only reduces the weight of the door panel but also provides a cable passage, simplifying cable layout and improving the convenience of installation and maintenance, without affecting the overall structural strength of the door panel.

[0012] Furthermore, the reading and writing distance of the RFID reader and RFID tag is less than or equal to 3cm. This setting of the reading and writing distance of the RFID reader and RFID tag ensures that effective reading can only be performed when the openable door panel is completely closed, avoiding misjudgments caused by excessive distance, and further improving the safety and reliability of the device.

[0013] Furthermore, the distance between the two hinged door panels when closed is less than 3cm. This spacing ensures the tightness of the doors when closed, preventing safety hazards caused by excessive gaps, while also guaranteeing effective communication between the RFID reader and the tag.

[0014] Furthermore, the warning call device is fixed at the center of the upper edge of the protective door support frame.

[0015] Furthermore, the RFID tag is an anti-metal RFID tag. Anti-metal RFID tags are encapsulated with special anti-magnetic and wave-absorbing materials, effectively solving the problem of metal signal interference. They have excellent anti-interference performance, can operate normally in complex environments, and facilitate the construction elevator control system to accurately determine whether the operable door panel is open or closed.

[0016] This utility model discloses an RFID construction elevator door interlocking device with a safety early warning function, the beneficial effects of which are:

[0017] This invention determines whether the safety doors on a given floor are closed or open by using an RFID reader to effectively read RFID tag information. If all safety doors are closed, the control system can maintain normal operation of the construction elevator. If any safety door is open, the corresponding floor's alarm call will sound and instruct personnel to close the safety door. The construction elevator can only be restarted after all safety doors are closed, thus preventing falls from heights and ensuring the safety of workers. Attached Figure Description

[0018] Figure 1 A schematic diagram of an RFID construction elevator door interlocking device with safety early warning function;

[0019] Figure 2 A schematic diagram showing the system connection of multiple door interlocking devices on multiple floors;

[0020] The components include: 1. Protective door support frame; 2. Openable door panel; 21. Hollowed-out partition window; 3. RFID reader; 4. RFID tag; 5. Early warning call device. Detailed Implementation

[0021] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0022] This embodiment provides an RFID construction elevator door interlocking device with a safety early warning function, which can be installed on multiple floors. (Refer to...) Figure 2 , Figure 2 In this context, 1F, 2F, 3F, and NF represent the first floor, the second floor, the third floor, and the Nth floor, respectively.

[0023] refer to Figure 1 Each construction elevator door interlocking device includes a protective door support frame 1. Both sides of the protective door support frame 1 are hinged with openable door panels 2. An RFID reader 3 and an RFID tag 4 are embedded on the adjacent sides of the two openable door panels 2 respectively. The RFID tag 4 contains the floor information of the protective door support.

[0024] When both hinged doors 2 are closed, the RFID reader 3 can read valid floor data from the RFID tag 4 and maintain a stable connection and signal strength within a set time window. When both hinged doors 2 are open, the distance between the RFID reader 3 and the RFID tag 4 increases, causing the RFID reader 3 to be unable to recognize the signal of the RFID tag 4 or the signal strength to decrease.

[0025] The tag slot and reader slot are located at the same height on both openable door panels 2. The reading and writing distance of the RFID reader 3 and RFID tag 4 is less than or equal to 3cm, and the distance between the two openable door panels 2 when closed is less than 3cm. This setting of the reading and writing distance of the RFID reader 3 and RFID tag 4 ensures that effective reading can only be performed when the openable door panels 2 are fully closed, avoiding misjudgments caused by excessive distance, and further improving the safety and reliability of the device.

[0026] The RFID reader 3 is electrically connected to the construction elevator control system, which in turn is electrically connected to the warning call device 5 installed on the protective door support frame 1. The warning call device 5 is fixed at the center of the upper edge of the protective door support frame 1.

[0027] In this embodiment, the construction elevator control system is existing technology, and it has an internal PLC controller. Since the construction elevator control system is existing technology, its specific working principle and connection relationships will not be described in detail in this embodiment. RFID tag 4 is an RFID anti-metal tag.

[0028] As specific fixing structures for the two openable door panels 2 to the RFID tag 4 and the RFID reader 3 respectively, the adjacent sides of the two openable door panels 2 are respectively provided with tag slots for fixing the RFID tag 4 and reader slots for fixing the RFID reader 3. The tag slots and reader slots ensure the stable fixing of the RFID tag 4 and the RFID reader 3, avoiding misjudgments or failures caused by loosening or displacement of the equipment, and enhancing the reliability and durability of the device.

[0029] As a further embodiment, each of the two openable door panels 2 has a perforated window 21 in its upper half. A reader slot is located on the openable door panel 2 near the bottom of the perforated window 21, and a cable hole for cable passage is horizontally provided within the reader slot. One end of the cable is electrically connected to the RFID reader 3, and the other end of the cable passes through the cable hole and the bottom of the perforated window 21, extending along the side of the protective door support frame 1 to be electrically connected to the controller of the construction elevator control system. The design of the perforated window 21 not only reduces the weight of the door panel but also provides a cable passage, simplifying cable arrangement and improving the convenience of installation and maintenance, while not affecting the overall structural strength of the door panel.

[0030] In summary, the working principle of this solution is as follows:

[0031] When both hinged doors 2 are closed, the RFID reader 3 can read valid floor data from the RFID tag 4 and maintain a stable connection and signal strength within a set time window. When both hinged doors 2 are open, the distance between the RFID reader 3 and the RFID tag 4 increases, causing the RFID reader 3 to be unable to recognize the signal of the RFID tag 4 or the signal strength to decrease. Therefore, the construction elevator control system can determine whether the safety door of a floor is closed or open by whether the RFID reader 3 can effectively read the information of the RFID tag 4. If all safety doors are closed, the construction elevator control system can control the construction elevator to operate normally. If the safety door of any floor is open, the warning call device 5 of the corresponding floor will issue a warning and call the floor personnel to close the safety door. The construction elevator can only be restarted after all safety doors on all floors are closed.

[0032] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. An RFID construction elevator door interlock device having a safety warning function, characterized by, The protective door support door frame (1) is hinged with openable and closable door panels (2) on both sides, and RFID readers (3) and RFID tags (4) for writing floor information of the protective door are embedded on the adjacent sides of the two openable and closable door panels (2), respectively, the RFID readers (3) are electrically connected with a construction elevator control system, and the construction elevator control system is electrically connected with a pre-warning caller (5) arranged on the protective door support door frame (1).

2. The RFID construction elevator door interlock device having a safety warning function according to claim 1, characterized in that, The adjacent sides of the two openable and closable door panels (2) are respectively provided with a tag slot for fixing the RFID tag (4) and a reader slot for fixing the RFID reader (3).

3. The RFID construction elevator door interlock device with a safety warning function according to claim 2, characterized in that, The tag slot and the reader slot are located at the same height of the two openable and closable door panels (2).

4. The RFID construction elevator door interlock device having a safety warning function according to claim 2, characterized in that, The upper half of the two openable and closable door panels (2) are provided with hollow windows (21).

5. The RFID construction elevator door interlock device with a safety warning function according to claim 4, characterized in that, The reader slot is located at the bottom of the openable and closable door panel (2) close to the hollow window (21), and a cable hole for cable passing is transversely arranged in the reader slot, one end of the cable is electrically connected with the RFID reader (3), and the other end of the cable sequentially passes through the cable hole and the bottom of the hollow window (21) and extends along the side edge of the protective door support door frame (1) to be electrically connected with a controller of the construction elevator control system.

6. The RFID construction elevator door interlock device having a safety warning function according to claim 1, characterized in that, The read-write distance of the RFID reader (3) and the RFID tag (4) is less than or equal to 3 cm.

7. The RFID construction elevator door interlock device having a safety warning function according to claim 1, characterized in that, The distance between the two openable and closable door panels (2) when closed is 1 cm to 3 cm.

8. The RFID construction elevator door interlock device with a safety warning function according to claim 1, characterized in that, The pre-warning caller (5) is fixed at the center of the upper frame end of the protective door support door frame (1).

9. The RFID construction elevator door interlock device having a safety warning function according to claim 1, characterized in that, The RFID tag (4) is an RFID anti-metal tag.

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