A platform door system manual bypass operation safety confirmation device
By using a combination of relay groups, modules, and pulse circuits in the platform screen door system, the detection and manual confirmation of the safety circuit are achieved, which solves the safety hazard problem when the train leaves the station and improves the safety and reliability of train operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CSSC HAIWEI TECH CO LTD
- Filing Date
- 2023-09-25
- Publication Date
- 2026-05-29
AI Technical Summary
In the existing technology, when the safety circuit of the train door or gap detection system is bypassed, there is a safety hazard of people or objects being trapped, which means that the risk of an accident when the train leaves the station has not been effectively eliminated.
The system employs a combination of relay groups, relay modules, pulse circuits, and self-resetting switches. The train departure signal is only activated after ensuring that there are no hidden dangers in the safety circuit through manual bypass operation and manual confirmation. This includes the series connection of relay modules and the logic control of pulse circuits.
It improves the safety and reliability of train operation. Through hard-wired connections and relay logic control, it ensures the correct operation of the safety circuit of the platform screen door system and reduces the probability of safety accidents.
Smart Images
Figure CN117198807B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of safety technology for rail transit platform screen doors, specifically relating to a safety confirmation device for manual bypass operation of a platform screen door system. Background Technology
[0002] With the rapid development of urban rail transit in my country and the promotion and application of fully automated driverless lines, the safety and reliability of platform screen doors, as devices that completely isolate the platform area from the tunnel track area, have received increasing attention. The safety circuit of the platform screen door system consists of three parts: sliding door, emergency door, and gap detection system. The platform screen door system safety circuit will only be activated when all three conditions are met simultaneously: the sliding door is closed and locked, the emergency door is closed and locked, and the gap detection system does not detect any obstacles. At this time, the platform screen door sends a "door fully closed and locked" signal to the signal system to notify the train that it can enter or leave the station normally. At the same time, the sliding door, emergency door, and gap detection system are each equipped with a safety circuit bypass switch. When the door fails to close and lock, or the gap detection fails and cannot be eliminated in time, in order not to affect the normal operation of the train, the faulty door or gap detection can be bypassed through the safety circuit only after the safety hazard has been eliminated. At this time, the faulty door or gap detection system will be disconnected from the safety circuit.
[0003] For driverless subway lines, bypassing the safety circuit of any door or gap detection system poses certain safety hazards. When a person or object gets caught between a sliding door and a train door and the door cannot close, if the safety circuit of that door is bypassed, the gap detector will send a "door fully closed and locked" signal to the signaling system if no obstacle is detected. After receiving the "door fully closed and locked" signal, the train will start to leave the station. At this time, people or objects between the doors will be squeezed and a safety accident will occur.
[0004] The prior art (CN 114348028 A) discloses a safety protection system and control method for rail transit platform screen doors. Specifically, it discloses a PEDC (Pre-Electronic Control Device) for issuing opening and closing commands to the site and feeding back the equipment operating status to the analysis host. The analysis host analyzes the received data and controls the on / off state of the platform screen door operating status loop through the control module based on the analysis results. The above-mentioned prior art controls the on / off state of the train operating status loop by judging the safe and unsafe state data. If the data is lost, the system cannot control the train operating status loop. When the safety loop of the train door or gap detection system is bypassed, the safety hazard of a safety accident that may occur when the door traps people or objects and the train leaves the station is still not eliminated.
[0005] Therefore, the technical problem to be solved by the present invention is: to bypass the safety circuit of the train door or gap detection system for detection, and to allow the train to leave the station only after manual confirmation that there are no safety hazards, so as to avoid the situation where people or objects are caught in the bypassed door and safety accidents occur when the train leaves the station. Summary of the Invention
[0006] To address the technical problem of bypassing the safety circuit of a train door or gap detection system for inspection, and ensuring that the train can only leave the station after manual confirmation that there are no safety hazards, thus preventing accidents such as people or objects being caught in the bypassed door, the present invention provides a manual bypass operation safety confirmation device for a platform door system.
[0007] The specific plan is as follows:
[0008] A safety confirmation device for manual bypass operation of a platform screen door system includes a relay group, a relay module, a pulse circuit, and a self-resetting switch; the relay module includes a manual bypass switch and a relay.
[0009] The manual bypass switch is connected in series with a relay, and the manual bypass switch is also connected to DC24V, and the relay is also connected to 24VGND.
[0010] The relay switch is connected in series with the DC24V and the input terminal of the pulse circuit. The output terminal of the pulse circuit is connected to the relay group.
[0011] The first switch of the relay group is connected in series, and the first switch of the relay group is also connected to a self-resetting switch;
[0012] The second and third switches of the relay group are connected in series to the door fully closed and locked signal sent from the platform door to the signaling system.
[0013] During manual bypass operation, the manual bypass switch closes, connecting DC24V to the relay, energizing the relay. The relay switch then closes, connecting DC24V to the pulse circuit input. The pulse circuit outputs a high pulse signal to the relay group, energizing the relay group. The first switch of the relay group closes, while the second and third switches open, disconnecting the "door fully closed and locked" signal from the platform door to the signaling system. The pulse circuit then outputs a low pulse signal to the relay group, unable to provide operating voltage. DC24V is then connected through the self-reset switch and the first switch of the relay group, energizing the relay group. When the self-reset switch is pressed, it opens, disconnecting the voltage and de-energizing the relay group. The second and third switches close, reconnecting the "door fully closed and locked" signal from the platform door to the signaling system.
[0014] When the first relay module performs manual bypass operation, the contacts of the manual bypass first switch change from normally open contacts to normally closed contacts. DC24V is connected to the first relay through the manual bypass first switch. When the first relay is energized, the contacts of the first relay switch change from normally open contacts to normally closed contacts. DC24V is connected to the input terminal of the first pulse circuit through the first relay switch.
[0015] The input of the first pulse circuit is connected to a DC24V voltage, triggering the internal logic control circuit to output a high-level pulse signal with a voltage of DC24V that is adjustable from 0 to 1 second. Subsequently, the first pulse circuit maintains a low-level pulse signal output of 0V until the next pulse trigger signal arrives.
[0016] When the input of the first pulse circuit changes from a low-level pulse signal to a high-level pulse signal, it is a valid pulse trigger signal. The output pulse signal of the first pulse circuit is unidirectional, and the current can only flow from the output of the first pulse circuit to the relay group.
[0017] A high-level pulse signal is connected to the relay group through the output terminal of the first pulse circuit. When the relay group is energized, the contacts of the first switch of the relay group change from normally open contacts to normally closed contacts, and the contacts of the second and third switches of the relay group change from normally closed contacts to normally open contacts.
[0018] The low-level pulse signal output by the first pulse circuit cannot provide DC24V voltage to the relay group. The relay group is connected to DC24V through the first switch and the self-reset switch of the relay group. The relay group is kept connected to DC24V, the second switch and the third switch of the relay group are disconnected, and the "door fully closed and locked" signal sent by the platform door system to the signal system is disconnected.
[0019] When the self-reset switch button is pressed, the contacts of the self-reset switch change from normally closed contacts to normally open contacts, the voltage of the self-reset switch becomes 0V, the voltage of the first switch of the relay group connected to the self-reset switch also becomes 0V, the relay group is de-energized, and the contacts of the second and third switches of the relay group return from the open state to the closed state, connecting the platform door system to the signal system to send a signal that the doors are fully closed and locked.
[0020] The beneficial effects of this invention are as follows:
[0021] The manual bypass safety circuit operation of the platform screen door system is tested. The "door fully closed and locked" signal sent to the signaling system is controlled by relays, pulse circuits, and push-button switches. Once the platform screen door system is detected to be performing a safety circuit bypass operation, the "door fully closed and locked" signal sent to the signaling system is immediately cut off. After confirming that there is no safety hazard in the safety circuit bypass operation, the confirmation button is pressed to reconnect the "door fully closed and locked" signal sent to the signaling system by the platform screen door system. The entire detection and control circuit adopts relay logic control and hard-wired connection, which has high reliability and improves the safety and reliability of train operation. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the present invention. Detailed Implementation
[0023] The technical solutions in the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the implementation of the present invention, and not all of it. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0024] The present invention comprises 24 relay modules ASD, relay KA, bypass switch P, and pulse circuit Q.
[0025] like Figure 1 As shown, a safety confirmation device for manual bypass operation of a platform screen door system includes a relay group KA0, a relay module ASD, a pulse circuit Q, and a self-resetting switch SB1.
[0026] The relay module ASD includes a manual bypass switch P and a relay KA;
[0027] The manual bypass switch P is connected in series with the relay KA. The manual bypass switch P is also connected to DC24V, and the relay KA is also connected to 24VGND.
[0028] The relay switch is connected in series with DC24V and the input terminal of the pulse circuit Q. The output terminal of the pulse circuit Q is connected to the relay group KA0. The relay group KA0 is connected in series with the first switch KA0-1 of the relay group. The first switch KA0-1 of the relay group is also connected to the self-reset switch SB1.
[0029] The second switch KA0-2 and the third switch KA0-3 of the relay group are connected in series to the "door fully closed and locked" signal sent from the platform door to the signaling system;
[0030] During manual bypass operation, the manual bypass switch P closes, connecting DC24V to relay KA. Relay KA is energized, and the relay switch closes, connecting DC24V to the input terminal of pulse circuit Q. Pulse circuit Q outputs a high pulse signal to relay group KA0, energizing relay group KA0. The first switch KA0-1 of relay group closes, while the second switch KA0-2 and the third switch KA0-3 of relay group open, disconnecting the "door fully closed and locked" signal sent by the platform door to the signaling system. Pulse circuit Q then outputs a low pulse signal to relay group KA0, unable to provide operating voltage for relay group KA0. DC24V is then connected through the self-reset switch SB1 and the first switch KA0-1 of relay group, driving relay group KA0 to work.
[0031] When the self-reset switch SB1 is pressed, the self-reset switch SB1 is opened, the voltage is cut off, the relay group KA0 is not energized, the second relay switch KA0-2 and the third relay switch KA0-3 are closed, and the "door fully closed and locked" signal sent by the platform door to the signal system is connected.
[0032] The following explanation uses the first relay module ASD1 as an example.
[0033] When the first relay module ASD1 performs a manual bypass operation, the contacts of the first manual bypass switch P1 change from normally open contacts to normally closed contacts, and DC24V is connected to the first relay KA1 through the first manual bypass switch P1.
[0034] When the first relay KA1 is powered on, the contacts of the first relay switch KA1-1 change from normally open contacts to normally closed contacts, and DC24V is connected to the input terminal of the first pulse circuit Q1 through the first relay switch KA1-1.
[0035] When the input terminal of the first pulse circuit Q1 is connected to a DC24V voltage, the first pulse circuit Q1 triggers the internal logic control circuit and outputs a high-level pulse signal with a pulse voltage of DC24V that is adjustable from 0 to 1s. Subsequently, the pulse circuit of the first pulse circuit Q1 maintains a low-level pulse signal output of 0V until the next pulse trigger signal arrives.
[0036] When the input of the first pulse circuit Q1 changes from a low-level pulse signal to a high-level pulse signal, it is a valid pulse trigger signal. The output pulse signal of the first pulse circuit Q1 is a unidirectional output, and the current can only flow from the output of the first pulse circuit Q1 to the relay group KA0.
[0037] A high-level pulse signal is connected to relay group KA0 through the output terminal of the first pulse circuit Q1. Relay group KA0 is energized, and the contacts of the first switch KA0-1 of the relay group change from normally open contacts to normally closed contacts. The contacts of the second switch KA0-2 and the third switch KA0-3 of the relay group change from normally closed contacts to normally open contacts.
[0038] The contacts of the self-resetting switch SB1 are self-resetting normally closed contacts.
[0039] When the output signal of the first pulse circuit Q1 changes from a high-level pulse signal to a low-level pulse signal, the output terminal of the first pulse circuit Q1 cannot provide DC24V voltage to the relay group KA0.
[0040] After the first pulse circuit Q1 outputs a low-level pulse signal, relay group KA0 connects to DC24V through the first switch KA0-1 and the self-reset switch SB1, keeping relay group KA0 always connected to DC24V. This ensures that the second switch KA0-2 and the third switch KA0-3 of the relay group are always in the open state, thus keeping the "door fully closed and locked" signal sent from the platform door system to the signal system in the open state.
[0041] When the self-reset switch SB1 button is pressed, the contacts of the self-reset switch SB1 change from normally closed contacts to normally open contacts, the voltage of the self-reset switch SB1 becomes 0V, the voltage of the first switch KA0-1 of the relay group connected to the self-reset switch SB1 also becomes 0V, causing the relay group KA0 to be de-energized, and the contacts of the second switch KA0-2 and the third switch KA0-3 of the relay group return from the open state to the closed state, connecting the "door fully closed and locked" signal sent by the platform door system to the signal system.
[0042] The manual bypass operation safety confirmation of relay modules ASD2-ASD24 operates in the same principle as the first relay module ASD1. As shown above, this invention enables manual safety confirmation via the self-reset switch SB1 button when manually bypassing the safety circuit of any platform door system, thereby reducing safety hazards in the platform door system and ensuring passenger safety and comfort.
[0043] The specific workflow of this invention is as follows:
[0044] Taking the first relay module ASD1 as an example, when the first relay module ASD1 performs a manual bypass operation, the contacts of the first manual bypass switch P1 change from normally open contacts to normally closed contacts. The DC24V voltage is connected to the first relay KA1 through the first manual bypass switch P1. The first relay KA1 is energized, and the contacts of the first relay switch KA1-1 change from normally open contacts to normally closed contacts. The DC24V voltage is connected to the input terminal of the first pulse circuit Q1 through the first relay switch KA1-1, triggering the pulse circuit Q1 to output a high-level pulse signal. The relay group KA0 is energized, and the contacts of the first relay switch KA0-1 change from normally open contacts to normally closed contacts. The contacts of the second relay switch KA0-2 and the third relay switch KA0-3 change from normally closed contacts to normally open contacts. The "door fully closed and locked" signal sent by the platform door system to the signal system is disconnected.
[0045] When the output of the first pulse circuit Q1 changes from a high-level pulse signal to a low-level pulse signal, or a low-level pulse signal, the output of the first pulse circuit Q1 cannot provide working voltage for the relay KA0. At this time, DC24V is connected to the relay group KA0 through the first switch KA0-1 and the self-reset switch SB1. The relay KA0 is energized, so that the "door fully closed and locked" signal sent by the platform door system to the signal system remains in the disconnected state.
[0046] After manual confirmation that there are no safety hazards, press the self-reset switch SB1. The contacts of the self-reset switch SB1 change from normally closed contacts to normally open contacts, the relay group KA0 is de-energized, the first switch KA0-1 of the relay group returns from the closed state to the open state, the second switch KA0-2 and the third switch KA0-3 of the relay group return from the open state to the closed state, and the "doors are fully closed and locked" signal sent from the platform door system to the signal system is connected, and the train departs the station.
[0047] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.
Claims
1. A safety confirmation device for manual bypass operation of a platform screen door system, characterized in that: It includes a relay group, a relay module, a pulse circuit, and a self-reset switch; the relay module includes a manual bypass switch and a relay. The manual bypass switch is connected in series with a relay, and the manual bypass switch is also connected to DC24V, and the relay is also connected to 24VGND. The relay switch is connected in series with the DC24V and the pulse circuit input terminal. The pulse circuit output terminal is connected to the relay group. The relay group is connected in series with the first switch of the relay group. The first switch of the relay group is also connected to the self-reset switch. The second and third switches of the relay group are connected in series to the door fully closed and locked signal sent from the platform door to the signaling system. During manual bypass operation, the manual bypass switch closes, connecting DC24V to the relay, energizing the relay. The relay switch then closes, connecting DC24V to the pulse circuit input. The pulse circuit outputs a high pulse signal to the relay group, energizing the relay group. The first switch of the relay group closes, while the second and third switches of the relay group open, disconnecting the "door fully closed and locked" signal from the platform door to the signaling system. The pulse circuit then outputs a low pulse signal to the relay group, unable to provide operating voltage. DC24V is then connected via the self-reset switch and the first switch of the relay group, energizing the relay group. When the self-reset switch is pressed, the self-reset switch opens, the voltage is cut off, the relay group is de-energized, the second relay switch and the third relay group switch close, and the platform door sends a fully closed and locked signal to the signal system.
2. The platform screen door system manual bypass operation safety confirmation device according to claim 1, characterized in that: When the first relay module performs manual bypass operation, the contacts of the manual bypass first switch change from normally open contacts to normally closed contacts. DC24V is connected to the first relay through the manual bypass first switch. When the first relay is energized, the contacts of the first relay switch change from normally open contacts to normally closed contacts. DC24V is connected to the input terminal of the first pulse circuit through the first relay switch.
3. The platform screen door system manual bypass operation safety confirmation device according to claim 1, characterized in that: The input of the first pulse circuit is connected to a DC24V voltage, triggering the internal logic control circuit to output a high-level pulse signal with a voltage of DC24V that is adjustable from 0 to 1 second. Subsequently, the first pulse circuit maintains a low-level pulse signal output of 0V until the next pulse trigger signal arrives.
4. The platform screen door system manual bypass operation safety confirmation device according to claim 1, characterized in that: When the input of the first pulse circuit changes from a low-level pulse signal to a high-level pulse signal, it is a valid pulse trigger signal. The output pulse signal of the first pulse circuit is unidirectional, and the current can only flow from the output of the first pulse circuit to the relay group.
5. The platform screen door system manual bypass operation safety confirmation device according to claim 1, characterized in that: A high-level pulse signal is connected to the relay group through the output terminal of the first pulse circuit. When the relay group is energized, the contacts of the first switch of the relay group change from normally open contacts to normally closed contacts, and the contacts of the second and third switches of the relay group change from normally closed contacts to normally open contacts.
6. The platform screen door system manual bypass operation safety confirmation device according to claim 1, characterized in that: The low-level pulse signal output by the first pulse circuit cannot provide DC24V voltage to the relay group. The relay group is connected to DC24V through the first switch and the self-reset switch of the relay group. The relay group is kept connected to DC24V, the second switch and the third switch of the relay group are disconnected, and the "door fully closed and locked" signal sent by the platform door system to the signal system is disconnected.
7. The platform screen door system manual bypass operation safety confirmation device according to claim 1, characterized in that: When the self-reset switch button is pressed, the contacts of the self-reset switch change from normally closed contacts to normally open contacts, the voltage of the self-reset switch becomes 0V, the voltage of the first switch of the relay group connected to the self-reset switch also becomes 0V, the relay group is de-energized, and the contacts of the second and third switches of the relay group return from the open state to the closed state, connecting the platform door system to the signal system to send a signal that the doors are fully closed and locked.