Safety monitoring system for platform screen door

Abstract

The utility model belongs to the field of platform screen doors, and relates to a platform screen door safety monitoring system which comprises a train signal system, a central control panel PSC, a platform screen door controller PEDC, a door control unit DCU, a platform screen door, a platform screen door sealing rubber strip, an obstacle detection sensor and an MEMS pressure sensor. The train signal system, the central control panel PSC, the shielding door controller PEDC, the door control unit DCU and the shielding door are in communication connection in sequence; the obstacle detection sensor and the MEMS pressure sensor are respectively in communication connection with the shielding door controller PEDC; and the MEMS pressure sensor is arranged on a sealing rubber strip of the shielding door. The platform screen door anti-pinch device achieves anti-pinch of the platform screen door, meanwhile, when people are pinched by the screen door, the screen door can be opened in time, and personnel safety is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of platform screen doors, specifically, it relates to a platform screen door safety monitoring system. Background Technology

[0002] In urban rail transit operations, when the train's stop time is up, the train signaling system issues a command to allow the doors to close, and the platform screen doors automatically close. However, on the platform or inside the train, with crowds and people rushing to get on and off, in severe cases, people may get trapped by the platform screen doors. Such incidents pose a significant threat to passenger safety.

[0003] To prevent injuries caused by platform screen doors trapping passengers, prior art document (CN213297764U) discloses an anti-pinch system for platform screen doors, including symmetrically arranged fixed doors and anti-pinch doors slidably disposed within the fixed doors and located on the same plane. The side walls of the two anti-pinch doors abut against each other and can move away from each other. Each anti-pinch door includes an anti-pinch sleeve and an anti-pinch plate slidably disposed within the anti-pinch sleeve. Adjacent side walls of the two anti-pinch plates are provided with mutually abutting buffer pads. The anti-pinch sleeve contains an elastic device that connects to the anti-pinch plates and provides a buffering effect on them. This application reduces the possibility of passenger injury due to delayed response of the platform screen door.

[0004] However, the aforementioned comparative documents mainly address situations where people are trapped by the platform screen doors, and do not cover the anti-pinch detection of the doors. Furthermore, existing anti-pinch detection methods have high detection errors for small objects such as children and pets. Therefore, this application proposes a platform screen door safety monitoring system. Utility Model Content

[0005] This utility model aims to overcome the shortcomings of the existing technology and proposes a platform screen door safety monitoring system to achieve the following objectives: to prevent the platform screen door from being pinched, and at the same time, to open the screen door in time when a person is pinched by the screen door, so as to ensure the safety of personnel.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a platform screen door safety monitoring system, the monitoring system comprising a train signaling system, a central control panel (PSC), a platform screen door controller (PEDC), a door control unit (DCU), a platform screen door, a platform screen door sealing strip, an obstacle detection sensor, and a MEMS pressure sensor, wherein the train signaling system, the central control panel (PSC), the platform screen door controller (PEDC), the door control unit (DCU), and the platform screen door are sequentially and communicatively connected; the obstacle detection sensor and the MEMS pressure sensor are respectively communicatively connected to the platform screen door controller (PEDC); the obstacle detection sensor is used to detect whether there is an obstacle between the platform screen door and the train body; the MEMS pressure sensor is installed on the platform screen door sealing strip to detect the pressure between the two sliding doors when the platform screen door is closed.

[0007] Preferably, the shielding door sealing strip includes a first sealing strip and a second sealing strip respectively disposed on the two sliding doors of the shielding door, wherein the first sealing strip is provided with a flange and a groove corresponding to the flange, and the first sealing strip and the second sealing strip abut against each other through the corresponding flange and groove.

[0008] Preferably, the MEMS pressure sensor is disposed in the first sealing strip or the second sealing strip.

[0009] Preferably, a plurality of MEMS pressure sensors are provided on a section of shielding door sealing strip, wherein the plurality of MEMS pressure sensors are respectively used to detect the pressure between the contact surface 11 of the first sealing strip and the contact surface 21 of the second sealing strip, between the contact surface 12 of the first sealing strip and the contact surface 22 of the second sealing strip, between the contact surface 13 of the first sealing strip and the contact surface 23 of the second sealing strip, between the contact surface 14 of the first sealing strip and the contact surface 24 of the second sealing strip, and between the contact surface 15 of the first sealing strip and the contact surface 25 of the second sealing strip.

[0010] Preferably, at least one section of the shielding door sealing strip is provided on the shielding door.

[0011] Preferably, the obstacle detection sensor includes an infrared sensor, which is communicatively connected to the shielded door controller PEDC.

[0012] Preferably, the monitoring system further includes an alarm device, which is communicatively connected to the platform screen door controller (PEDC) and is used to issue an alarm based on a closing failure signal issued by the platform screen door controller (PEDC).

[0013] The technical effects of this utility model are as follows: (1) This utility model can achieve safe and effective safety monitoring. When a person or object is trapped in the platform screen door, the MEMS pressure sensor set on the sealing strip of the platform screen door will generate a pressure value. When the pressure is abnormal, the anti-pinch function is triggered, and the door is reopened, preventing the train from departing and the personnel from being injured. (2) When an obstacle is trapped between the train body and the platform screen door, if the station staff fails to handle it in time, the trapped person can press the sealing strip on the back of the platform screen door to make the pressure of the MEMS pressure sensor abnormal and trigger the anti-pinch function, so that the door is reopened and the train is not departing, thus avoiding personal injury at the first time. (3) This utility model combines obstacle monitoring and pressure detection to provide feedback on the closing status of the platform screen door, and at the same time takes into account the anti-pinch between sliding doors and the anti-pinch between the platform screen door and the train body, thus avoiding the safety hazards caused by the platform screen door trapping people. Attached Figure Description

[0014] Figure 1 This is a structural diagram of a platform screen door safety monitoring system according to an embodiment of the present utility model;

[0015] Figure 2 This is a schematic diagram of the shielding door sealing strip structure according to an embodiment of the present utility model;

[0016] Figure 3 This is a cross-sectional view of the sealing strip for the shielding door according to an embodiment of the present invention.

[0017] Figure 2 and Figure 3 In the diagram: 1 represents the first sealing strip; 2 represents the second sealing strip; 11-15 represent different contact surfaces of the first sealing strip; 21-25 represent different contact surfaces of the second sealing strip. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. The purpose is to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of this utility model, and to facilitate its implementation. It should be noted that the terms "first," "second," etc., used in this application are only for the convenience of describing the technical solution and distinguishing different components, and are not intended to limit this application. To make the technical solution of this utility model clearer, it will be explained and illustrated through the following embodiments.

[0019] In advance, platform screen doors are safety facilities installed at the edge of platforms in subway, light rail, and other urban rail transit systems. They typically consist of two opposing sliding doors. Their main function is to prevent passengers from accidentally falling onto the tracks, thus improving passenger safety. Additionally, to reduce noise and prevent the two sliding doors from colliding when closing, existing technology usually includes sealing strips on the contact surfaces of the two doors.

[0020] This embodiment provides a platform screen door safety monitoring system, such as Figure 1 As shown, the monitoring system includes a train signaling system, a central control panel (PSC), a platform screen door controller (PEDC), a gate control unit (DCU), a platform screen door, a platform screen door sealing strip, an obstacle detection sensor, and a MEMS pressure sensor. The train signaling system, the central control panel (PSC), the platform screen door controller (PEDC), the gate control unit (DCU), and the platform screen door are sequentially and communicatively connected. The obstacle detection sensor and the MEMS pressure sensor are respectively communicatively connected to the platform screen door controller (PEDC).

[0021] In this embodiment, the obstacle detection sensor includes an infrared sensor, which is communicatively connected to the shielded door controller PEDC. The infrared sensor can detect obstacles by detecting whether infrared light is blocked.

[0022] In this embodiment, the structure of the shielding door sealing strip is as follows: Figure 2 As shown, it includes a first sealing strip 1 and a second sealing strip 2 respectively installed on the two sliding doors of the shielding door. The first sealing strip 1 is provided with a flange and a groove corresponding to the flange. The first sealing strip 1 and the second sealing strip 2 abut against each other through the corresponding flange and groove.

[0023] Correspondingly, the MEMS pressure sensor is disposed in the first sealing strip 1 or the second sealing strip 2. Of course, for pressure measurement at the same point, MEMS pressure sensors of the same specification can also be installed at corresponding positions in the first sealing strip 1 and the second sealing strip 2, thereby forming redundancy backup and verification between them.

[0024] Furthermore, in this embodiment, multiple MEMS pressure sensors can be installed on a section of the shielding door's sealing strip. (As shown in the image...) Figure 3In the cross-sectional view of the shielding door sealing strip shown, the plurality of MEMS pressure sensors are respectively used to detect the pressure between the contact surface 11 of the first sealing strip 1 and the contact surface 21 of the second sealing strip 2, between the contact surface 12 of the first sealing strip 1 and the contact surface 22 of the second sealing strip 2, between the contact surface 13 of the first sealing strip 1 and the contact surface 23 of the second sealing strip 2, between the contact surface 14 of the first sealing strip 1 and the contact surface 24 of the second sealing strip 2, and between the contact surface 15 of the first sealing strip 1 and the contact surface 25 of the second sealing strip 2.

[0025] According to the above-mentioned MEMS pressure sensor configuration scheme, during pressure detection, the pressure between the contact surface 12 of the first sealing strip 1 and the contact surface 22 of the second sealing strip 2, and the pressure between the contact surface 14 of the first sealing strip 1 and the contact surface 24 of the second sealing strip 2 are all recorded as back pressure. Under normal circumstances, the detection result of back pressure should be 0 and fluctuate within a preset acceptable range.

[0026] The pressure between the contact surface 11 of the first sealing strip 1 and the contact surface 21 of the second sealing strip 2, the pressure between the contact surface 13 of the first sealing strip 1 and the contact surface 23 of the second sealing strip 2, and the pressure between the contact surface 15 of the first sealing strip 1 and the contact surface 25 of the second sealing strip 2 are all recorded as contact surface pressure. Under normal circumstances, the detection result of the contact surface pressure is a certain value, and it fluctuates within a preset acceptable range. The shielded door controller PEDC can determine whether the shielded door is completely closed based on the detection results of the back pressure and the contact surface pressure under normal circumstances. If it is not completely closed, it indicates that an object is pressing in, and the door has trapped a person or object.

[0027] In a preferred embodiment of this invention, multiple segments of shielding door sealing strips, each equipped with a MEMS pressure sensor according to the above-described scheme, are installed on the shielding door. Multiple segments of shielding door sealing strips mean more MEMS pressure sensor detection points, almost completely covering the contact surface between the two sliding doors of the shielding door. This ensures comprehensive safety monitoring from top to bottom when the shielding door is closed, preventing system misjudgments caused by children, pets, or other individuals being too short.

[0028] In this embodiment, after the train enters the station, the train signaling system sends a door opening permission signal to the central control panel (PSC). Based on the door opening permission signal, the central control panel (PSC) calls the platform screen door controller (PEDC) to control the gate control unit (DCU) to continuously send door opening signals to the platform screen door. The platform screen door opens according to the door opening signal and remains open.

[0029] When the train is about to leave the station, the train signaling system sends a door-closing permission signal to the central control panel (PSC). Based on the door-closing permission signal, the PSC calls the platform screen door controller (PEDC) to control the door control unit (DCU) to stop sending door-opening signals. After the door-opening signal stops, the platform screen door begins to reset, that is, it begins to close.

[0030] During the closing process of the platform screen doors, obstacle detection sensors detect whether there are obstacles between the platform screen doors and the train body, and feed the detection results back to the platform screen door controller (PEDC). If no obstacle is detected, the PEDC continues to close the platform screen doors. If an obstacle is detected for the first time, the PEDC stops the closing process via the gate control unit (DCU) and waits for a period of time before acquiring the obstacle detection result again. If an obstacle is still present, the PEDC resets the platform screen doors to the fully open state and sends a closing failure signal. If the obstacle has been cleared, the closing speed is reduced, and the PEDC attempts to close the doors again.

[0031] After the platform screen doors are closed, this embodiment includes a MEMS pressure sensor on the sealing strip of the platform screen doors to detect the pressure between the two sliding doors when the doors are closed and to feed the pressure detection result back to the platform screen door controller (PEDC). The PEDC determines whether the platform screen doors are fully closed based on the pressure magnitude. If they are not fully closed, it indicates that an object is pressing against them and the door has trapped a person or object. When fully closed, the PEDC sends a closing and locking signal and transmits it to the train signaling system via the central control panel (PSC). The train can only leave the station after the train signaling system receives closing and locking signals from all platform screen doors. If the PEDC determines that the platform screen doors are not fully closed based on the pressure magnitude, it resets the platform screen doors to the fully open state via the door control unit (DCU) and then reduces the closing speed to try closing the doors again. If it still cannot close completely, it resets the platform screen doors to the fully open state and sends a closing failure signal.

[0032] In addition, the monitoring system in this embodiment also includes an alarm device, which is communicatively connected to the platform screen door controller (PEDC) and is used to trigger an alarm based on a closing failure signal issued by the PEDC. In specific implementations, the alarm device can be a buzzer, alarm light, or other similar equipment.

[0033] This embodiment features a simple overall structure and low modification cost. It enables effective safety monitoring. When a person or object is trapped in the platform screen door, a MEMS pressure sensor on the door's sealing strip generates a pressure value. An abnormal pressure triggers the anti-pinch function, reopening the door and preventing train departure, thus protecting personnel from injury. If an obstacle becomes trapped between the train body and the platform screen door, and station staff fail to handle it promptly, this embodiment allows trapped personnel to press the sealing strip on the back, causing an abnormal pressure on the MEMS pressure sensor and triggering the anti-pinch function, reopening the door and preventing train departure, thus preventing immediate injury. This embodiment combines obstacle detection and pressure detection for platform screen door closure status feedback, while also addressing anti-pinch measures between sliding doors and between the platform screen door and the train body, preventing safety hazards caused by people being trapped in the platform screen door.

[0034] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A platform screen door safety monitoring system, characterized in that: The monitoring system includes a train signaling system, a central control panel (PSC), a platform screen door controller (PEDC), a door control unit (DCU), a platform screen door, a platform screen door sealing strip, an obstacle detection sensor, and a MEMS pressure sensor. The train signaling system, PSC, PEDC, DCU, and platform screen door are sequentially and communicatively connected. The obstacle detection sensor and MEMS pressure sensor are communicatively connected to the PEDC. The obstacle detection sensor detects whether there are obstacles between the platform screen door and the train body. The MEMS pressure sensor is installed on the platform screen door sealing strip to detect the pressure between the two sliding doors when the platform screen door is closed.

2. The platform screen door safety monitoring system according to claim 1, characterized in that: The shielding door sealing strip includes a first sealing strip and a second sealing strip respectively disposed on the two sliding doors of the shielding door. The first sealing strip is provided with a flange and a groove corresponding to the flange. The first sealing strip and the second sealing strip abut against each other through the corresponding flange and groove.

3. The platform screen door safety monitoring system according to claim 2, characterized in that: The MEMS pressure sensor is disposed in the first sealing strip or the second sealing strip.

4. The platform screen door safety monitoring system according to claim 3, characterized in that: On a section of shielding door sealing strip, a plurality of MEMS pressure sensors are provided, wherein the plurality of MEMS pressure sensors are respectively used to detect the pressure between the contact surface (11) of the first sealing strip and the contact surface (21) of the second sealing strip, between the contact surface (12) of the first sealing strip and the contact surface (22) of the second sealing strip, between the contact surface (13) of the first sealing strip and the contact surface (23) of the second sealing strip, between the contact surface (14) of the first sealing strip and the contact surface (24) of the second sealing strip, and between the contact surface (15) of the first sealing strip and the contact surface (25) of the second sealing strip.

5. A platform screen door safety monitoring system according to claim 4, characterized in that: At least one section of the aforementioned shielding door sealing strip is installed on the shielding door.

6. A platform screen door safety monitoring system according to any one of claims 1-5, characterized in that: The obstacle detection sensor includes an infrared sensor, which is communicatively connected to the shielded door controller PEDC.

7. A platform screen door safety monitoring system according to any one of claims 1-5, characterized in that: The monitoring system also includes an alarm device, which is communicatively connected to the platform screen door controller PEDC and is used to issue an alarm based on the door closing failure signal issued by the platform screen door controller PEDC.

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