Full-digital vehicle-mounted passenger information system

Abstract

The utility model discloses a full-digital vehicle-mounted passenger information system which comprises a cab control host installed in a cab and a passenger room control host installed in a passenger room, the cab control host is connected with equipment in the cab and the passenger room through a main bus or a standby bus, and when a fault of the main bus is detected, the main bus is connected with the passenger room control host through the standby bus. And abandoning the general main line and starting the standby bus. The cab control host detects and judges whether the main bus breaks down or not, the standby bus is started to keep subway operation when the main bus breaks down, and batch equipment paralysis caused by a single-point fault is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of subway information, and in particular relates to a fully digital on-board passenger information system. Background Art

[0002] In the subway sector, the onboard Passenger Information System (PIS) is a comprehensive platform that integrates subway operational information and multimedia services. During normal operations, it provides passengers with real-time information such as train schedules, arrival information, and announcements. In emergencies, it prioritizes the dissemination of important information such as evacuation instructions. The system utilizes advanced multimedia network technology to ensure rapid and accurate information transmission, providing passengers with clear and intuitive displays via station and onboard display terminals. The PIS system not only enhances the passenger travel experience but also strengthens the safety and efficiency of subway operations.

[0003] A PIS typically consists of three subsystems: a passenger address subsystem, a passenger information display system, and a video surveillance system. These subsystems communicate using analog signals and a bus connection, resulting in relatively poor communication stability. Single-point failures can paralyze a large number of devices, and the devices lack the ability to upload fault status diagnostics. Therefore, a fully digital onboard passenger information system with improved communication stability and a lower failure rate is needed. Utility Model Content

[0004] The purpose of the utility model is to provide a fully digital vehicle-mounted passenger information system with better communication stability and lower failure rate.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The fully digital on-board passenger information system includes a driver's cab control host installed in the driver's cab and a passenger cab control host installed in the passenger cab. The driver's cab control host is connected to the equipment in the driver's cab and the passenger cab using a main bus or a backup bus. When a main bus failure is detected, the main bus is abandoned and the backup bus is enabled.

[0007] The control host in the driver's cab detects and determines whether the main bus is faulty. In case of fault, the backup bus is activated to keep the subway running, avoiding batch equipment paralysis caused by single point failure.

[0008] Furthermore, the main bus is an Ethernet bus, and the backup bus is a broadcast / intercom analog bus and a CAN communication bus.

[0009] The Ethernet bus can realize heartbeat diagnosis, and the broadcast / intercom analog bus and CAN communication bus can realize broadcasting from the driver's cab to the passenger compartment.

[0010] Furthermore, the driver's cab control host and the passenger cab control host, as well as adjacent passenger cab control hosts, are connected via a main bus.

[0011] Furthermore, a passenger compartment speaker is installed in the passenger compartment, a driver compartment monitoring speaker is installed in the driver compartment, and the driver compartment control host, the passenger compartment control host, the passenger compartment speaker and the driver compartment monitoring speaker are connected via a backup bus.

[0012] All broadcasting equipment is connected via a backup bus to prevent other equipment from affecting the broadcasting function after failure.

[0013] Furthermore, a driver control unit is provided in the driver's cab. The driver control unit is connected to the driver's cab control host through a main bus and a backup bus. The driver control unit is connected to the passenger cab control host through a backup bus. The two driver control units are connected through a backup bus.

[0014] The driver control unit and the driver cab control host are connected through the main bus in normal state. When a fault is detected, the driver control units can be connected through the backup bus to avoid the two driver cabs being unable to communicate when the main bus fails.

[0015] Furthermore, the PISC board in the driver's cab control host performs heartbeat diagnosis through the main bus. When it is diagnosed that multiple devices in a single passenger compartment or multiple devices in multiple passenger compartments are offline, the PISC board determines that the main bus is faulty and switches to the backup bus.

[0016] Heartbeat diagnosis is used to detect the operating status of equipment in the driver's cab and passenger compartment, and the PISC board is used to determine whether the equipment is faulty and issue a switching command.

[0017] Furthermore, the heartbeat diagnosis is that the devices in the driver's cab and passenger compartment periodically send signals to the PISC board, and the diagnosis mechanism is that the PISC board does not receive continuous signals from a certain device.

[0018] A properly functioning device will periodically send signals to the PISC board and stop sending signals when a fault occurs.

[0019] Furthermore, the MVB board of the driver's cab control host receives the vehicle operation information forwarded by the transportation management system. The MVB board parses the vehicle operation information and sends it to the PISC board. The PISC board parses the vehicle operation information and forwards it to the equipment in the passenger compartment through the main bus and the backup bus. After receiving the instruction, the equipment in the passenger compartment replies to the PISC board through the main bus.

[0020] The PISC board is used to receive vehicle operation information and forward it to other devices.

[0021] Furthermore, the transportation management system is connected to the driver's cab control host through a noise detection data line.

[0022] The transportation management system and the driver's cab control host are not connected through the main bus and the backup bus, and the failure of the main bus will not affect the information transmission between the two.

[0023] Furthermore, the driver's cab control host is provided with a data storage board, which stores information received by the driver's cab control host, and the data storage board is configured with a button battery to power it.

[0024] After a fault occurs, the data storage board stores data, and the button battery can retain data for 30 days in the event of a power outage on the data storage board.

[0025] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0026] The control host in the driver's cab detects and determines whether the main bus is faulty. In case of fault, the backup bus is activated to keep the subway running, avoiding batch equipment paralysis caused by single point failure.

[0027] The main bus uses the Ethernet bus to realize heartbeat diagnosis, and the backup bus uses the 0 broadcast / intercom analog bus and the CAN communication bus to realize broadcasting from the driver's cab to the passenger compartment.

[0028] The PISC board performs heartbeat diagnosis on the equipment in the driver's cab and passenger compartment to determine whether multiple devices on the train have failed and thus switch to the backup bus. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] Figure 1 Schematic diagram of the fully digital on-board passenger information system.

[0031] Among them, the figure

[0032] PCU-driver's cab control unit, FCAM-forward view camera, CCAM-driver's cab camera, DACU-driver control unit, SCP-driver's cab monitoring speaker, PIS-passenger information system, SCU-passenger cab control unit, LSP-passenger cab speaker, LCD-liquid crystal display, LMDU-dynamic map, IDU-through-the-aisle LED screen, SCAM-passenger cab camera, NVR-hard disk recorder, NDU-noise detector. DETAILED DESCRIPTION

[0033] like Figure 1 As shown, there is a driver's cab at each end of the train, and a passenger compartment connected to each other between the two driver's cabs. Generally, a train has six passenger compartments. Figure 1 The middle guest room is omitted and only the first and last guest rooms are shown.

[0034] The fully digital onboard passenger information system is installed in both the driver's cab and the passenger compartment. The driver's cab includes the PCU, forward-facing camera (FCAM), cab camera (CCAM), driver control unit (DACU), cab monitor speaker (SCP), and passenger information system (PIS). The passenger compartment includes the SCU, LSP, LCD, dynamic map display (LMDU), gangway LED screen (IDU), cab camera (SCAM), and NVR.

[0035] like Figure 1 As shown, green is the Ethernet bus, pink is the broadcast / intercom analog bus and CAN communication bus connection, and black is the noise detection audio line.

[0036] The driver's cab control host PCU and the passenger compartment control host SCU are connected through the Ethernet bus.

[0037] Inside the driver's cab, the PCU is connected to the forward-view camera (FCAM), the cab camera (CCAM), and the passenger information system (PIS) via an Ethernet bus. The PCU is connected to the driver control unit (DACU) via an Ethernet bus, a PA / intercom analog bus, and a CAN communication bus. The DACU is connected to the cab monitor speaker (SCP) via a PA / intercom analog bus and a CAN communication bus. The PCU is connected to the transportation management system (TCMS) and radio via a noise detection audio cable.

[0038] Inside the passenger compartment, the SCU is connected to the LCD, dynamic map display (LMDU), gangway LED display (IDU), passenger camera (SCAM), and hard disk recorder (NVR) via an Ethernet bus. The SCU is connected to the passenger loudspeaker (LSP) via the PA / intercom analog bus and the CAN communication bus. The SCU is also connected to the noise detector (NDU) via a noise detection audio cable.

[0039] The driver control units DACU of the two driver cabs are connected via the broadcast / intercom analog bus and the CAN communication bus.

[0040] The driver's cab control host PCU is equipped with PISC board, MVB board and data storage board.

[0041] When the train starts, the driver's key activates. The PCU, which receives the key activation signal, monitors all train equipment in real time via the Ethernet bus using heartbeat diagnostics. Devices in the driver's cab connected to the PCU via the Ethernet bus, and devices in the passenger compartment connected to the SCU via the Ethernet bus, transmit signals to the PISC board at a regular frequency. The diagnostic mechanism identifies a communication failure as a result of five consecutive packet losses. If the PISC board detects that multiple devices in a single compartment, or multiple devices in multiple compartments, are offline, the PISC determines that the Ethernet bus has failed, triggering a bus switch to the backup bus for broadcasting, enabling intercom communication between the two cabs. However, the offline or unresponsive nature of a single device does not trigger a bus switch.

[0042] The MVB board of the driver's cab control host PCU receives the vehicle operation information forwarded by the transportation management system. The MVB board parses the vehicle operation information and sends it to the PISC board. The PISC board parses the vehicle operation information and forwards it to the equipment in the passenger compartment through the main bus and the backup bus. After receiving the instructions, the equipment in the passenger compartment replies to the PISC board through the main bus.

[0043] The data storage board stores information received by the PCU in the driver's cab. It is powered by a button battery. After a fault occurs, the data storage board stores data, and the button battery can retain power for 30 days even if the data storage board loses power.

[0044] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications based on the present invention that solve essentially the same technical problems and achieve essentially the same technical effects are included within the scope of protection of the present invention.

Claims

1. The fully digital onboard passenger information system includes a driver's cab control host installed in the driver's cab and a passenger compartment control host installed in the passenger compartment, and is characterized by: The driver's cab control host is connected to the devices in the driver's cab and the passenger compartment using a primary bus or a backup bus. When a primary bus failure is detected, the primary bus is abandoned and the backup bus is activated. The PISC board in the driver's cab control host performs heartbeat diagnosis via the primary bus. When it is diagnosed that multiple devices in a single passenger compartment or multiple devices in multiple passenger compartments are offline, the PISC board determines that the primary bus has failed and switches to the backup bus. The transportation management system is connected to the driver's cab control host via a noise detection audio line; the driver's cab control host is provided with a data storage board, which stores information received by the driver's cab control host, and the data storage board is equipped with a button battery for powering it.

2. The fully digital vehicle passenger information system according to claim 1, characterized in that: The main bus is an Ethernet bus, and the backup bus is a broadcast / intercom analog bus and a CAN communication bus.

3. The fully digital vehicle passenger information system according to claim 1, characterized in that: The driver's cab control host and the passenger compartment control host, as well as adjacent passenger compartment control hosts, are connected via the main bus.

4. The fully digital vehicle passenger information system according to claim 1, characterized in that: A passenger compartment speaker is installed in the passenger compartment, a driver compartment monitoring speaker is installed in the driver compartment, and the driver compartment control host, the passenger compartment control host, the passenger compartment speaker and the driver compartment monitoring speaker are connected via the backup bus.

5. The fully digital vehicle passenger information system according to claim 1 is characterized by: A driver control unit is provided in the driver's cab. The driver control unit is connected to the driver's cab control host via the main bus and the backup bus. The driver control unit is connected to the passenger cab control host via the backup bus. The two driver control units are connected to each other via the backup bus.

6. The fully digital vehicle passenger information system according to claim 1 is characterized by: The heartbeat diagnosis is that the devices in the driver's cab and the passenger compartment periodically send signals to the PISC board, and the diagnosis mechanism is that the PISC board does not receive continuous signals from a certain device.

7. The fully digital vehicle passenger information system according to claim 1 is characterized by: The MVB board of the driver's cab control host receives the vehicle operation information forwarded by the transportation management system. The MVB board parses the vehicle operation information and sends it to the PISC board. The PISC board parses the vehicle operation information and forwards it to the equipment in the passenger compartment through the main bus and the backup bus. After receiving the instruction, the equipment in the passenger compartment replies to the PISC board through the main bus.

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