A device for monitoring the state of a door switch

Abstract

The utility model provides a kind of device for monitoring switch door state, it is related to elevator technical field, solve the problem that current elevator door machine system has certain limitation when detecting small object. Including: door machine controller, position sensor, light curtain, small object detection device, motor, door leaf;Position sensor is used to detect door leaf to first direction operation reaches target position when sending position prompt signal to door machine controller;The receiving end of light curtain is used to when monitoring laser beam continuous communication break state time exceeds target time length, sends unobstructed prompt signal to door machine controller;Door machine controller is used to when receiving position prompt signal and unobstructed prompt signal simultaneously, generates trigger signal, sends trigger signal to small object detection device;Small object detection device is used to when receiving trigger signal, execute detection to small object.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, specifically to a device for monitoring the opening and closing status of doors. Background Technology

[0002] To avoid risks such as people getting trapped or the elevator car moving unexpectedly, and to ensure the safe operation of the elevator, it is necessary to monitor the opening and closing position and movement of the elevator doors in real time, and to ensure that the elevator only starts running after the doors are completely closed and locked.

[0003] The elevator door operator system integrates the elevator main control system, door operator controller, light curtain, touch panel and other safety devices to form an integrated control device. Based on the real-time detection of the door opening status, it optimizes the door opening and closing time, door moving speed, acceleration and other factors, balances waiting time and elevator operating efficiency, promptly detects safety hazards (such as people entering the elevator in an emergency), avoids safety accidents, and reduces mechanical wear and energy consumption.

[0004] However, since the beam spacing of traditional safety light curtains is usually 10-30mm, the current elevator door operator system has certain limitations in detecting small objects (such as thin sheets, thin ropes or pet leashes). In addition, the touch panel requires a certain amount of physical pressure to trigger, which means that objects with a thickness or diameter smaller than the detection accuracy may not be effectively identified, posing certain safety hazards. Summary of the Invention

[0005] In view of the shortcomings of the above-mentioned related technologies, the present invention provides a device for monitoring the opening and closing status of doors to solve the above-mentioned technical problems.

[0006] This utility model provides a device for monitoring the opening and closing status of a door, comprising: a door operator controller, a position sensor, a light curtain, a small object detection device, a motor, and a door leaf; the door operator controller is connected to the elevator main control system, and is also connected to the position sensor, the light curtain, the small object detection device, and the motor; the motor is connected to the door leaf; the position sensor generates a prompt signal when the door leaf reaches a target position in a first direction, and sends the position prompt signal to the door operator controller; the light curtain receiver generates an unobstructed prompt signal and sends it to the door operator controller when the duration of the continuous on / off state of the laser beam exceeds a target time length; the door operator controller generates a trigger signal and sends it to the small object detection device when it simultaneously receives both the position prompt signal and the unobstructed prompt signal; the small object detection device performs small object detection upon receiving the trigger signal.

[0007] In one embodiment of the present invention, the small object detection device includes a force sensor and a signal circuit disposed on the edge of the car door;

[0008] The signal circuit is connected to the force sensor. When the force sensor is subjected to force, the electrical grid changes and generates a resistance signal.

[0009] The signal circuit is used to convert the resistance signal into a voltage signal through a digital-to-analog converter, analyze the voltage signal to generate an alarm signal and send it to the door operator controller;

[0010] The door operator controller is used to control the motor to reverse and open the door in response to an alarm signal.

[0011] In one embodiment of this utility model, the small object detection device includes a magnet and a Hall sensor; the magnet and the Hall sensor are arranged in pairs, and the magnet is arranged longitudinally along the inner side of the aluminum profile of the door leaf; the magnet and the Hall sensor are used to form a continuous magnetic field monitoring network, and when a foreign object appears between the elevator doors, the change in the magnet-Hall gap at the corresponding position generates voltage fluctuations;

[0012] The door operator controller detects the voltage fluctuation and controls the motor to reverse, thus opening the door.

[0013] In one embodiment of the present invention, the device for monitoring the opening and closing status of a door further includes a visual information acquisition unit; the visual information acquisition unit is connected to a small object detection device, and the visual information acquisition unit has a built-in target detection model and is connected to a camera;

[0014] The visual information acquisition unit is used to detect targets in the video or images captured by the camera. When the visual information acquisition unit detects an object being pulled by a rope, it calculates the height of the object and sends the height information to the small object detection device.

[0015] The small object detection device is also used to detect small objects in areas corresponding to height information.

[0016] In one embodiment of the present invention, the device for monitoring the opening and closing status of the elevator doors further includes an alarm; the small object detection device detects that a rope is caught between the elevator doors and sends an alarm signal to the alarm.

[0017] The alarm is used to send alarm information to the property management or elevator maintenance personnel through a communication system.

[0018] In one embodiment of this utility model, the device for monitoring the opening and closing status of the elevator doors also includes a box; the lid of the box is equipped with an electromagnetic lock, and when the small object detection device detects that a rope is caught between the elevator doors, it can also send an electrical signal to the electromagnetic lock, which then opens.

[0019] As described above, the elevator safety monitoring device provided by this utility model has the following beneficial effects:

[0020] The device for monitoring the opening and closing status of elevator doors proposed in this utility model is configured with a connection between a position sensor, a light curtain, and a small object detection device. The position sensor monitors the time when the elevator door is about to close, and the light curtain's detection results determine whether there is a large obstruction in the middle of the elevator door. Based on the results of the above two judgments, the timing for small object detection is determined. Before the elevator door can be opened, targeted detection is performed on small objects such as ropes. Even if an alarm is triggered, it prevents the safety risk of damage to the object at one end of the rope due to the car's movement, as the two ends of the rope are located inside and outside the car respectively. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0022] Figure 1 This is a schematic diagram of the device for monitoring the opening and closing status of doors proposed in this utility model;

[0023] Figure 2 This is a schematic diagram of the small object detection device installed in the elevator door monitoring and opening / closing status device of this utility model;

[0024] Figure 3 This is another example diagram of the small object detection device of this utility model;

[0025] Figure 4 This is another schematic diagram of the device for monitoring the opening and closing status of doors proposed in this utility model;

[0026] Figure 5 The side view of the force sensor installed on the edge of the car door shown;

[0027] Figure 6 This is another schematic diagram of the device for monitoring the opening and closing status of doors proposed in this utility model;

[0028] Figure 7 This is a schematic diagram of an elevator car;

[0029] The diagram is labeled as follows: 1. Controller; 2. Position sensor; 3. Light curtain; 4. Small object detection device; 41. Force sensor; 42. Signal circuit; 43. Magnet; 44. Hall sensor; 5. Motor; 6. Door leaf; 7. Visual information acquisition unit; 8. Alarm; 9. Box body. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. 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 protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying 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.

[0032] In the embodiments of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "comprising" and "including" as used throughout the specification and claims are open-ended terms and should therefore be interpreted as "comprising but not limited to".

[0033] Example 1

[0034] Figure 1 This is a schematic diagram of the relationship between the device for monitoring the opening and closing status of doors proposed in this utility model, as shown below. Figure 1 As shown, the device for monitoring the opening and closing status of the doors includes a door operator controller 1, a position sensor 2, a light curtain 3, a small object detection device 4, a motor 5, and a door leaf 6. The door operator controller 1 is connected to the elevator main control system, and can be connected to the elevator main control system via RS-485 or CAN bus.

[0035] The light curtain 3 is installed on both sides of the elevator door (near the door gap) and consists of a transmitter and a receiver. The transmitter emits infrared rays or lasers to form a dense detection beam network. By detecting the signals received by the receiver, it can determine whether there are objects or people passing between the elevator doors.

[0036] For example, if the beam received by the receiver is inconsistent with the beam of the transmitter during the closing process of the elevator door, it means that the beam is blocked by a passenger or object. The receiver generates a trigger signal and sends it to the door controller 1. The door controller 1 controls the door 6 to stop moving in the closing direction and move in the opening direction to prevent people or objects from being pinched.

[0037] Position sensor 2 is installed on the car door guide rail or door operator. Position sensor 2 can be a photoelectric switch, magnetic sensor, etc. It determines the specific position of the door in real time by detecting the physical position of the door movement (such as the opening / closing point, deceleration zone), and feeds back the accurate door position signal to door operator controller 1 through closed-loop control and safety interlock. Door operator controller 1 combines the information from position sensor 2, light curtain 3, and elevator main control system to control the running direction and speed of door 6, specifically through motor 5 to control the movement of door 6.

[0038] In the device for monitoring the opening and closing status of the door, the door operator controller 1 is connected to the position sensor 2, the light curtain 3, the small object detection device 4, and the motor 5. The motor 5 is connected to the door leaf 6.

[0039] Based on the structure of the device for monitoring the opening and closing status of the door described above, the position sensor 2 is also used to detect when the door leaf 6 moves to the target position in a first direction, generate a prompt signal when the door leaf 6 reaches the target position, and send the position prompt signal to the door operator controller 1. The first direction is the direction in which the door leaf moves relative to each other, and the second direction is the direction in which the door leaf moves in the opposite direction.

[0040] The receiver of the light curtain 3 has a built-in processing unit. The receiver of the light curtain 3 determines whether there is an obstruction in real time based on the on / off state of the received laser beam. When the receiver of the light curtain 3 detects that the continuous on / off state of the laser beam exceeds the target time length, it generates an unobstructed prompt signal and sends the unobstructed prompt signal to the door controller 1.

[0041] An unobstructed view signal indicates that the light curtain has not detected any obstacle passing through door 6, confirming that no large object, including objects, people, or animals, will pass through the elevator door within a certain time period. Position sensor 2 sends a position signal indicating that the elevator door is about to close.

[0042] Door controller 1 receives both a position indication signal and an unobstructed indication signal, indicating that the elevator door is about to close. At the same time, the light curtain 3 does not detect any large obstacles passing through the elevator door. Therefore, door controller 1 generates a trigger signal and sends it to the small object detection device 4. This device performs a supplementary detection of small obstacles between the elevator doors after the elevator door is closed and locked and before door controller 1 sends a "door fully closed" digital signal to the elevator main control system. This allows the small object detection device 4 to detect small objects, such as thin pieces, ropes, or pet leashes, between the elevator doors before the elevator starts running, thus preventing safety accidents.

[0043] Example 2

[0044] Figure 2 This is a schematic diagram of the small object detection device installed in the elevator door monitoring and opening / closing status device of this utility model. (See reference) Figure 2The small object detection device 4 includes a force sensor 41 installed on the edge of the car door. The force sensor is a flexible piezoresistive thin-film sensor that can be attached along the entire length of the door edge.

[0045] When one side of the rope enters the elevator with a person, and the other side of the rope is attached to an object outside the elevator; or when one side of the rope is attached to an object entering the elevator, and the other side of the rope is outside the elevator, if the light curtain 3 does not detect the rope, before the elevator door closes, due to the pulling of the rope, the stress at the contact point between the door edge and the rope will inevitably be different from the stress at other locations. The small object detection device 4 also includes a signal circuit 42, which is connected to a force sensor 41. The force sensor 41 is subjected to force, causing the electric grid to transform and generate a resistance signal. The resistance signal is input to the signal circuit 42, which converts the resistance signal into a voltage signal through a digital-to-analog converter. Then, the microcontroller makes control decisions based on the changes in the voltage signal. For example, if a local high voltage peak (such as 1.5-5V) is detected in the voltage signal, the microcontroller generates an alarm signal and sends it to the door controller 1. The door controller 1 responds to the alarm signal and controls the motor 5 to reverse, and the door 6 opens.

[0046] Figure 3 This is another example diagram of the small object detection device of this utility model, for reference. Figure 3 The small object detection device 4 may also include a magnet 43 and a Hall sensor 44. The magnet 43 and the Hall sensor 44 are installed in pairs. The magnets are arranged longitudinally along the aluminum profile inside the door leaf 6. Neodymium iron boron N42SH nickel-plated magnets (typical size D6×3mm) can be used. They are evenly distributed with a spacing of ≤150mm and embedded in the magnet mounting groove 8-10mm away from the door edge. In the bottom 2150-2310mm height range (this area is generally the common height of objects pulled by ropes, such as pet dogs), the spacing needs to be increased to 80mm and installed at a 15° downward angle to enhance the detection capability of the sill area.

[0047] Hall sensors 44 are fixed to the car door mounting bracket. The gap between Hall sensors 44 is 3±0.5mm, and the parallel gap between each Hall sensor 44 and its corresponding magnet is 3±0.5mm. The axial deviation angle is controlled within 1°. Hall sensors 44 are connected to door controller 1 via RS485 bus. When the elevator door closes, the multiple magnets 43 and multiple Hall sensors 44 form a continuous magnetic field monitoring network. When a foreign object (such as a rope) causes deformation of the door gap, the change in the magneto-Hall gap at the corresponding position will trigger a characteristic voltage fluctuation (ΔV>1.5V). Door controller 1 detects this voltage fluctuation and controls motor 5 to reverse, and door 6 to open, preventing damage to the object at one end of the rope when the elevator car moves upward after the elevator door closes.

[0048] Example 3

[0049] Figure 4This is another schematic diagram of the device for monitoring the opening and closing status of doors proposed in this utility model, for reference. Figure 4 The device for monitoring the opening and closing status of the door also includes a visual information acquisition unit 7, which is connected to a small object detection device 4. The visual information acquisition unit 7 has a built-in target detection model and is connected to a camera to receive video or images captured by the camera. It detects the object being pulled by the rope through the target detection model and calculates the height of the object being pulled by the rope. When the visual information acquisition unit 7 detects the object being pulled by the rope and calculates its height, it sends the height information to the small object detection device 4. The small object detection device 4 then performs targeted small object detection on the area corresponding to the height information.

[0050] For example, the small object detection device 4 may include an array of multiple force sensors 41, and a processor, such as Figure 5 The side view of the force sensor installed on the edge of the car door shows that flexible piezoresistive thin-film sensors are arranged in segments on the edge of the car door. If the height information h is in the range of [1200, 1800], the processor of the small object detection device 4 controls all the flexible piezoresistive thin-film sensors in the range of [1200, 1800] to be turned on. The area corresponding to the height information is the target area where the rope is more likely to appear. More sensors are dynamically turned on in the target area to perform sufficient detection, increasing the probability of detecting the rope, while reducing the consumption caused by all sensors being turned on for a long time.

[0051] The same method of using the height information fed back by the visual information acquisition unit 7 to perform targeted small object detection in the target area in the example small object detection device 4 described above can also be used in combination with magnet 43 and Hall sensor 44. Multiple pairs of magnet 43 and Hall sensor 44 are redundantly installed at each height. The processor controls all magnets 43 and Hall sensors 44 in the target area to be turned on, thereby increasing the accuracy of target area detection.

[0052] Figure 6 This is another schematic diagram of the device for monitoring the opening and closing status of doors proposed in this utility model, for reference. Figure 6 The device for monitoring the opening and closing status of the door also includes an alarm 8 and a housing 9.

[0053] The small object detection device 4 detects a rope caught between the elevator doors and sends an alarm signal to the alarm device 8. The alarm device 8 then sends the alarm information to the property management or elevator maintenance personnel via the communication system. Simultaneously, the small object detection device 4 sends an alarm signal to the elevator main control system. The elevator main control system performs logic calculations and controls the elevator car to stop at the next floor. If the rope is long enough, this can prevent the escalation of a safety accident.

[0054] like Figure 7 , Figure 7 This is a schematic diagram of an elevator car. Figure 7 The present invention provides a reference diagram of the position of the box in the device for monitoring the opening and closing status of the elevator car door. The box is set on one side wall of the elevator car door, and the box contains a tool for cutting ropes. The cover 9 of the box is equipped with an electromagnetic lock. When the small object detection device 4 detects that a rope is caught between the elevator doors, it can also send an electrical signal to the electromagnetic lock of the cover. The electromagnetic lock opens, and the passenger in the elevator takes out the tool in the cover 9 to cut the rope, reducing the damage to the object at one end of the rope caused by the movement of the car.

[0055] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for monitoring the opening and closing status of a door, characterized in that, The device for monitoring the opening and closing status of the door includes: door operator controller (1), position sensor (2), light curtain (3), small object detection device (4), motor (5), and door leaf (6); the door operator controller (1) is connected to the elevator main control system, the door operator controller (1) is connected to the position sensor (2), light curtain (3), small object detection device (4), and motor (5), and the motor (5) is connected to the door leaf (6); The position sensor (2) is used to detect when the door leaf (6) reaches the target position in the first direction and generate a prompt signal, and send the position prompt signal to the door controller (1); The receiver of the light curtain (3) is used to generate an unobstructed prompt signal and send the unobstructed prompt signal to the door controller (1) when the time when the continuous connection and disconnection of the laser beam is detected exceeds the target time length. The door controller (1) is used to generate a trigger signal and send the trigger signal to the small object detection device (4) when it receives both the location prompt signal and the unobstructed prompt signal at the same time. The small object detection device (4) is used to perform the detection of small objects when a trigger signal is received.

2. The device for monitoring the opening and closing status of a door according to claim 1, characterized in that, The small object detection device (4) includes a force sensor (41) and a signal circuit (42) disposed on the edge of the car door. The signal circuit (42) is connected to the force sensor (41). The force sensor (41) is subjected to force, which causes the electric grid to transform and generate a resistance signal. The signal circuit (42) is used to convert the resistance signal into a voltage signal through a digital-to-analog converter, analyze the voltage signal to generate an alarm signal and send it to the door controller (1). The door operator controller (1) is used to control the motor (5) to reverse and the door (6) to open in response to the alarm signal.

3. The device for monitoring the opening and closing status of a door according to claim 1, characterized in that, The small object detection device (4) includes a magnet (43) and a Hall sensor (44); the magnet (43) and the Hall sensor (44) are installed in pairs, and the magnet is arranged longitudinally along the aluminum profile inside the door leaf (6); the magnet (43) and the Hall sensor (44) are used to form a continuous magnetic field monitoring network. When a foreign object appears between the elevator doors, the change in the magnetic-Hall gap at the corresponding position generates voltage fluctuations. The door controller (1) is used to detect the voltage fluctuation and control the motor (5) to reverse so that the door (6) can open.

4. The device for monitoring the opening and closing status of a door according to claim 1, characterized in that, The device for monitoring the opening and closing status of the door also includes a visual information acquisition unit (7); the visual information acquisition unit (7) is connected to the small object detection device (4), and the visual information acquisition unit (7) has a built-in target detection model and is connected to a camera; The visual information acquisition unit (7) is used to perform target detection on the video or image captured by the camera. When the visual information acquisition unit (7) detects the object being pulled by the rope, it calculates the height of the object being pulled by the rope and sends the height information to the small object detection device (4). The small object detection device (4) is also used to perform targeted small object detection for areas corresponding to height information.

5. The device for monitoring the opening and closing status of a door according to claim 1, characterized in that, The device for monitoring the opening and closing status of the doors also includes an alarm (8); a small object detection device (4) detects that a rope is caught between the elevator doors and sends an alarm signal to the alarm (8). The alarm (8) is used to send alarm information to the property management or elevator maintenance personnel through the communication system.

6. The device for monitoring the opening and closing status of a door according to claim 1, characterized in that, The device for monitoring the opening and closing status of the doors also includes a box (9); the cover of the box (9) is equipped with an electromagnetic lock. When the small object detection device (4) detects that there is a rope between the elevator doors, it can also send an electrical signal to the electromagnetic lock, and the electromagnetic lock opens.

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