Train consist intercom system and related control method

Abstract

The application discloses a train group vehicle-mounted intercom system, which can be used in the field of train group communication and comprises an information system controller, a car controller and an intercom terminal which are connected in communication. The information system controller is arranged in a first car where a crew room is located. A plurality of intercom terminals are arranged in the crew room and passenger areas in each car where passengers are located respectively. At least one car controller is arranged in each car. The car controller is used for forwarding a call request and an audio signal initiated by the intercom terminal to the information system controller and forwarding a received audio signal to the intercom terminal. The information system controller is used for establishing a talk link between two intercom terminals in response to the received call request and delivering an audio signal sent by a first car controller in the talk link to a second car controller in the talk link. Thus, a direct talk link between passengers and a crew is established, and the service efficiency of train passenger transport can be improved.

Description

Technical Field

[0001] This application relates to the field of train communication technology, and in particular to a train onboard intercom system and related control methods. Background Technology

[0002] With the rapid development of rail transit, EMU trains and high-speed trains have become the core carriers of long-distance passenger transport, and passengers have put forward higher requirements for the responsiveness of train passenger transport services.

[0003] Currently, train set onboard intercom systems generally only enable communication between the driver and the attendant, and between the driver and the passenger. Passengers need to find the attendant on-site to ask for help or inquiries, or they need to talk to the driver through the passenger emergency alarm and then have the driver relay the passenger's needs to the attendant. This results in redundant communication links and delayed response, leading to low efficiency in train passenger service.

[0004] Therefore, how to improve the efficiency of train passenger services has become a problem that needs to be solved. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a train set onboard intercom system and related control methods, which can improve the efficiency of train passenger services.

[0006] The embodiments of this application disclose the following technical solutions: This application provides a train set onboard intercom system, applicable to train sets with multiple carriages. The system includes: an information system controller, a carriage controller, and an intercom terminal connected by communication. Multiple intercom terminals are deployed in the crew compartment and the passenger area in each carriage; at least one carriage controller is deployed in each carriage. The carriage controller is used to forward call requests and audio signals initiated by the intercom terminal in the carriage to the information system controller; and to forward received audio signals sent by the information system controller to the intercom terminal in the carriage. The information system controller is used to establish a communication link between two intercom terminals in response to a received call request; when the communication link is established, it sends the audio signal sent by the first carriage controller in the communication link to the second carriage controller in the communication link.

[0007] Optionally, the intercom terminal includes a first intercom terminal, a second intercom terminal, and a third intercom terminal; The first intercom terminal is deployed in the crew compartment, the second intercom terminal is deployed in the driver's compartment, and the third intercom terminal is deployed in the passenger area; The first intercom terminal is used to receive calls from any intercom terminal, and to call any one, any group of intercom terminals, or all of the second and third intercom terminals. The second intercom terminal is used to receive calls from any intercom terminal, and to call any one of the first intercom terminal and the third intercom terminal. The third intercom terminal is used to receive calls from any intercom terminal, and to call any one of the first intercom terminal and the second intercom terminal.

[0008] Optionally, establishing a communication link between the two intercom terminals in response to a received call request includes: In response to a call request from a target third intercom terminal to a first intercom terminal, a target first intercom terminal is determined from multiple first intercom terminals based on the correspondence between multiple sets of first intercom terminals and carriage identifiers, and the carriage identifier corresponding to the target third intercom terminal; each set of first intercom terminals includes at least one first intercom terminal. Establish a communication link between the target third intercom terminal and the target first intercom terminal.

[0009] Optionally, if the first intercom terminal receives an emergency call request while processing a normal call request, it interrupts the call corresponding to the normal call request and connects the call corresponding to the emergency call request.

[0010] Optionally, the first intercom terminal is equipped with a display screen; The display screen is used to display the initiating carriage identifier corresponding to the call request and the type of call request; the types of call requests include at least normal and emergency.

[0011] Optionally, the first intercom terminal has a built-in digital relay module; The digital relay module is used to amplify and shape the audio signal forwarded by the carriage controller and the audio signal to be sent to the carriage controller.

[0012] Optionally, the third intercom terminal is equipped with an emergency call function; the emergency call function is used to call the first intercom terminal. When the third intercom terminal initiates an emergency call request through the emergency call function, the information system controller triggers an alarm signal in the crew cabin; the alarm signal includes at least one of an alarm light and an alarm sound.

[0013] Optionally, the number of the third intercom terminals in each carriage is the same as the number of passenger emergency alarms in the carriage.

[0014] Optionally, the carriage controller includes an audio processing module and an audio amplifier module; The audio processing module is used to preprocess the received audio signal and forward the amplified audio signal to the information system controller or the intercom terminal in the carriage. The audio power amplifier module is used to amplify the power of the pre-processed audio signal.

[0015] Optionally, the system further includes: a signal relay module; The signal relay module is deployed in the target area of ​​the carriage where the signal strength is lower than the average signal strength, and is used for: Receive signals sent by the carriage controller; When the signal strength in the target area is lower than a preset threshold, the received signal is enhanced to obtain a stable signal; The stable signal is then transmitted back to the carriage controller.

[0016] Optionally, the signal relay module includes a digital repeater station; The digital repeater station adopts a dual-timeslot time-division multiple access structure.

[0017] Optionally, the information system controller uses the Session Initiation Protocol (SIP) to establish a call link.

[0018] Optionally, the information system controller uses the Digital Mobile Radio (DMR) communication standard to implement digital intercom communication.

[0019] Optionally, the information system controller is deployed in the first carriage where the crew compartment is located.

[0020] In a second aspect, embodiments of this application provide a control method for an information system controller, applied to the information system controller described in any embodiment of the first aspect, the method comprising: In response to a received call request, a communication link is established between the two intercom terminals; When the communication link is established, the audio signal sent by one intercom terminal in the communication link through the first carriage controller is sent down to the second carriage controller corresponding to the other intercom terminal in the communication link.

[0021] Thirdly, embodiments of this application provide a control method for a carriage controller, applied to the carriage controller described in any embodiment of the first aspect, the method comprising: The call request and audio signal initiated by the intercom terminal in the carriage are forwarded to the information system controller. The received audio signal sent by the information system controller is forwarded to the intercom terminal in the carriage.

[0022] Compared with the prior art, this application has the following beneficial effects: This application provides a train set onboard intercom system for train sets with multiple carriages. The system includes: an information system controller, a carriage controller, and intercom terminals connected by communication; wherein, multiple intercom terminals are deployed in the crew compartment, the driver's cab, and the passenger area in each carriage; each carriage is equipped with at least one carriage controller; the carriage controller is used to forward call requests and audio signals initiated by the intercom terminals in its carriage to the information system controller; and to forward received audio signals to the intercom terminals in its carriage; the information system controller is used to establish a communication link between two intercom terminals in response to a received call request; and, when the communication link is established, to send the audio signal sent by the first carriage controller in the communication link to the second carriage controller in the communication link.

[0023] Thus, by working together with the information system controller, carriage controller and intercom terminals deployed in multiple locations, a direct communication link between passengers and crew members is established, enabling two-way communication between passengers and crew members, crew members and drivers, and drivers and passengers. Passengers can directly call the crew members for help or inquiries without having to go through the driver, which greatly shortens the response time and improves the efficiency of train passenger service. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of a train set onboard intercom system provided in this application embodiment; Figure 2 This is a schematic diagram of another train set onboard intercom system provided in an embodiment of this application; Figure 3 This is a diagram illustrating the architecture of a train set onboard intercom system, provided as an embodiment of this application. Detailed Implementation

[0026] The train set onboard intercom system provided in this application can be used in the field of train set communication. The above is only an example and does not limit the application field of the train set onboard intercom system provided in this application.

[0027] The terms "first," "second," "third," and "fourth," etc., used in this application specification, claims, and drawings are used to distinguish different objects, not to limit a specific order.

[0028] In the embodiments of this application, the terms "as an example" or "for example" are used to indicate that they are examples, illustrations, or explanations. Any embodiment or design that is described as "as an example" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design options. Specifically, the use of terms such as "as an example" or "for example" is intended to present the relevant concepts in a specific manner.

[0029] The terminology used in the implementation section of this application is for the purpose of explaining specific embodiments of this application only, and is not intended to limit this application.

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0031] See Figure 1 The figure is a schematic diagram of a train set onboard intercom system provided in an embodiment of this application. The system is applied to a train set with multiple carriages and includes: an information system controller 100, a carriage controller 200, and an intercom terminal 300 with communication connection.

[0032] The components in this system can connect to the UIC568 ​​(International Union of Railways Standard 568) audio bus via the train's internal Ethernet bus (self-healing ring network) to achieve bidirectional signal transmission. They also interact with the Train Control and Management System (TCMS) via the Train Real-Time Data Protocol (TRDP) communication interface. Specifically, the information system controller 100 and the carriage controller 200 can be connected via a gigabit Ethernet bus; the carriage controller 200 and the intercom terminal 300 are connected via the UIC568 ​​audio bus.

[0033] The information system controller 100 is deployed in the first carriage where the crew member's compartment is located; multiple intercom terminals 300 are deployed in the crew member's compartment, the driver's compartment, and the passenger area in each carriage; and at least one carriage controller 200 is deployed in each carriage.

[0034] The carriage controller 200 is used to forward call requests and audio signals initiated by the intercom terminal 300 in the carriage to the information system controller 100; and to forward received audio signals sent by the information system controller 100 to the intercom terminal 300 in the carriage.

[0035] For example, the carriage controller 200 can use the original carriage controller of the EMU. The carriage controller 200 and the information system controller 100 can be connected via an Ethernet bus, such as via a gigabit Ethernet bus.

[0036] The carriage controller 200 is used to receive audio signals and call requests transmitted by the intercom terminal 300 in the carriage, and can integrate an audio processing module and an audio power amplifier module.

[0037] The audio processing module is used to preprocess the received audio signal, such as noise reduction, gain adjustment, encoding and decoding, and / or echo suppression. The audio signal, after being amplified by the audio power amplifier module, is forwarded to the information system controller or the intercom terminal in the carriage. The audio power amplifier module is used to amplify the preprocessed audio signal and drive the speaker to output audio that conforms to the UIC568 ​​standard, so as to achieve clear external playback and meet the volume requirements of intercom calls and call prompts.

[0038] The information system controller 100 is used to establish a communication link between two intercom terminals 300 in response to a received call request; when the communication link is established, the audio signal sent by the first carriage controller in the communication link is sent to the second carriage controller in the communication link.

[0039] The first carriage controller and the second carriage controller are carriage controllers 200 to which the two intercom terminals 300 in the communication link are respectively connected. When any intercom terminal 300 in the communication link transmits an audio signal, the information system controller 100 sends the received audio signal to the carriage controller 200 connected to the other intercom terminal 300 in the communication link.

[0040] The information system controller 100 is the core control unit of the system, and is the only one deployed in the first carriage where the crew's compartment is located. It can be integrated with the train's existing passenger information system controller, without the need for a new independent host. The information system controller 100 is used to realize, but is not limited to, communication control, signal scheduling, priority management, and data processing for all intercom terminals 300.

[0041] For example, the information system controller 100 uses the Session Initiation Protocol (SIP) to establish a communication link. During the operation of the train's onboard intercom system, when any intercom terminal 300 issues a call request, the information system controller 100 immediately calls the relevant processing unit of the SIP protocol to automatically initiate the standard session establishment process, actively complete the matching of the calling and called terminal addresses, session channel negotiation, and communication parameter exchange, and quickly establish a communication link between the two intercom terminals 300.

[0042] Leveraging the lightweight nature and simple interaction of the SIP protocol, the process of establishing a call link is greatly simplified, eliminating redundant data verification and complex link matching steps. This effectively shortens the session establishment time, enables rapid voice communication, and significantly reduces overall communication latency at the protocol level. As a result, the system's intercom response time can be stably controlled within 1 second, meeting the real-time communication needs for daily inquiries and emergency calls during train operation.

[0043] For example, the information system controller 100 uses the Digital Mobile Radio (DMR) communication standard to implement digital intercom communication.

[0044] Therefore, the information system controller 100 is equipped with a DMR communication standard processing program for digital communication, which can realize intercom communication with strong anti-interference, clear voice and stable transmission using digital communication mode; at the same time, the passenger information system controller originally has an analog audio communication processing program, which enables the information system controller 100 to be compatible with both digital communication mode and analog communication mode, without the need for large-scale modification of the original passenger information system controller.

[0045] As an example, the information system controller 100 can integrate a vehicle-to-ground communication gateway and an audio module. The vehicle-to-ground communication gateway is used to realize protocol conversion, data forwarding, and communication connection between the train's internal intercom system and the ground communication network, completing the interaction and transmission of intercom-related information between the train and the ground control center. The audio module is used to collect, encode, decode, mix, reduce noise, and forward audio signals from the entire train's intercom system, enabling the processing and transmission of two-way voice communication between passengers and crew members, crew members and drivers, and drivers and passengers.

[0046] In this embodiment, a direct communication link between passengers and train attendants is established through the collaborative operation of the information system controller, carriage controller, and multi-location deployed intercom terminals. This enables two-way communication between passengers and attendants, attendants and drivers, and drivers and passengers. Passengers can directly call attendants for help or inquiries without going through the driver, significantly reducing response time and improving train passenger service efficiency. Furthermore, the architecture combining local signal forwarding by carriage controllers with centralized scheduling by the information system controller reduces the impact of a single point of failure on the entire system, improving the operational stability and reliability of the train's onboard intercom system. Each carriage independently deploys its own carriage controller, which is then coordinated with the information system controller for unified scheduling. This results in a simple architecture with low modification difficulty, compatibility with existing train hardware layouts, low system deployment and maintenance costs, and ease of practical application.

[0047] As an example, the information system controller 100 adopts a primary-backup redundancy architecture, configured with a primary control unit and a backup control unit. The information system controller 100 can automatically detect its own hardware status, communication link status, intercom terminal connection status, and / or software operation status in real time. When it detects an abnormality in the primary control unit, communication interruption, or module failure, it automatically generates fault status information and completes fault location, thereby realizing system fault self-checking. If a failure is detected in the primary control unit, it can automatically trigger the backup control unit to switch over, and the backup control unit takes over the functions of the primary control unit, enabling the system to operate continuously and stably and reducing operational risks.

[0048] As an example, the information system controller 100 can employ multi-core heterogeneous chips and embedded processors to process multiple call requests in parallel, perform high-speed communication protocol conversion, process audio signals in real time, and stably operate system control logic, thereby meeting the low latency, high concurrency, and high stability requirements of the train set onboard intercom system, enabling the system to work reliably and continuously in complex operating environments.

[0049] As an example, the information system controller 100 may have a reserved standardized expansion interface for seamless integration with the train's existing broadcasting system and TCMS system via the TRDP communication interface, in order to meet the needs of passenger guidance and operational coordination, as well as the needs of future intelligent upgrades.

[0050] See Figure 2 The figure is a schematic diagram of another train set onboard intercom system provided in an embodiment of this application. In this system, the intercom terminal 300 includes a first intercom terminal 310, a second intercom terminal 320 and a third intercom terminal 330.

[0051] The first intercom terminal 310 is deployed in the crew room, the second intercom terminal 320 is deployed in the driver's room, and the third intercom terminal 330 is deployed in the passenger area.

[0052] The first intercom terminal 310 is used to receive calls from any intercom terminal, and to call any one, any group of intercom terminals, or all of the second intercom terminal 320 and the third intercom terminal 330.

[0053] For example, the first intercom terminal 310 can be a fixed terminal, uniformly installed in the crew room, such as in the crew room of car 5 of the EMU, and linked with the information system controller 100 and passenger smart display screen in car 5, supporting single call (i.e., calling one intercom terminal), group call (i.e., calling a group of intercom terminals), and all call (i.e., calling all intercom terminals) functions. The crew can receive calls from passengers in each car and calls from the driver through the first intercom terminal 310, and actively call the second intercom terminal 320 or the third intercom terminal 330 in any car.

[0054] In one embodiment, the third intercom terminals 330 located in the passenger area can be managed in groups. Each third intercom terminal 330 deployed in each carriage corresponds to a call group, and a correspondence between multiple groups of first intercom terminals 310 and carriage identifiers is established. Each group of first intercom terminals 310 includes at least one first intercom terminal 310.

[0055] The correspondence between a group of first intercom terminals 310 and the carriage identifier can be one-to-one or one-to-many. The number of first intercom terminals 310 in each group can be the same or different. For example, if a train has N carriages and carriage identifiers include carriage 1, carriage 2, ..., carriage N, then every n first intercom terminals 310 can form a group, or the number of first intercom terminals 310 in each group can be set separately. Each group of first intercom terminals 310 corresponds to a different carriage identifier. A group of first intercom terminals 310 can jointly receive calls from the same carriage, or a group of first intercom terminals 310 can correspond to multiple carriage identifiers. For example, a group of first intercom terminals 310 can simultaneously correspond to the identifiers of carriages 1 and 2, and simultaneously receive calls from both carriages.

[0056] Based on this, after receiving a call request from the target third intercom terminal to the first intercom terminal 310 (i.e., a passenger calling a flight attendant), the information system controller 100 can determine the target first intercom terminal from multiple first intercom terminals based on the correspondence between multiple sets of first intercom terminals 310 and carriage identifiers, as well as the carriage identifier corresponding to the target third intercom terminal; and then establish a communication link between the target third intercom terminal and the target first intercom terminal.

[0057] For example, if the carriage identifier corresponding to the target third intercom terminal is carriage 2, then according to the correspondence between multiple sets of first intercom terminals 310 and carriage identifiers, a set of first intercom terminals 310 corresponding to carriage 2 can be determined. Then, any idle first intercom terminal 310 can be selected from this set of first intercom terminals 310 as the target first intercom terminal, and a communication link between the target third intercom terminal and the target first intercom terminal can be established.

[0058] Therefore, the information system controller 100 can automatically allocate call requests to the corresponding first intercom terminal in the crew room based on the carriage identifier of the carriage where the third intercom terminal 330 is located. By relying on the group management mechanism, the call is allocated in a targeted manner, which facilitates the overall management of intercom permissions and call order by carriage, orderly guides multiple parallel calls, and reduces communication congestion.

[0059] If the flight attendant does not respond to the call promptly, the call request may continue for 60 seconds. For example, the corresponding first intercom terminal 310 will ring continuously for 60 seconds and trigger an alarm signal in the flight attendant's cabin to prompt the flight attendant to respond as soon as possible. The alarm signal includes at least one of an alarm light and an alarm sound.

[0060] In one embodiment, the first intercom terminal 310 can be configured with call priorities, such as prioritizing emergency call requests over regular call requests. Therefore, if the first intercom terminal 310 receives an emergency call request while processing a regular call request, it can interrupt the call corresponding to the regular call request and connect the call corresponding to the emergency call request.

[0061] Therefore, configuring emergency call requests with a higher priority can automatically seize the call link and interrupt regular calls to prevent emergency help requests from being delayed, ensure that emergency information is transmitted as soon as possible, realize the priority allocation of communication resources on demand, and facilitate the crew to respond to emergency requests made in the carriage through emergency call requests, such as sudden dangers or personal assistance, and shorten the response time of emergency handling.

[0062] In one embodiment, the first intercom terminal 310 may be configured with a display screen, which is used to display the initiating carriage identifier corresponding to the call request and the type of call request; wherein the type of call request includes at least normal and emergency.

[0063] Therefore, the location and nature of the call can be displayed intuitively on the screen, allowing train attendants to quickly determine the urgency of the request, make a quick response decision, and shorten the information confirmation time, thus greatly improving the efficiency of train passenger service and emergency response.

[0064] In one embodiment, the first intercom terminal 310 may also have a built-in digital relay module. The digital relay module is used to amplify and shape the audio signal forwarded by the carriage controller 200 and the audio signal to be sent to the carriage controller 200, supporting 400MHz frequency band communication to improve the anti-interference capability of communication. The co-frequency signal suppression can be ≥-12dB to improve the communication stability in environments such as the plateau and tunnel groups of the Sichuan-Tibet Railway or the high-speed operation of the EMU.

[0065] The second intercom terminal 320 is used to receive calls from any intercom terminal, and to call any one of the first intercom terminal 310 and the third intercom terminal 330.

[0066] For example, the second intercom terminal 320 can be compatible with the train set's existing driver intercom equipment, such as the in-car telephone, and can establish a communication link with the first intercom terminal 310 or the third intercom terminal 330 through the Ethernet bus, UIC568 ​​audio bus and information system controller 100.

[0067] Thus, the driver can receive calls from the first intercom terminal 310, another second intercom terminal 320, or the third intercom terminal 330 through the second intercom terminal 320, or can also actively call the first intercom terminal 310, realizing two-way communication between the driver and the attendant, as well as between the driver and the passenger, while retaining the original intercom function between drivers to ensure operational continuity.

[0068] The third intercom terminal 330 is used to receive calls from any intercom terminal, and to call any one of the first intercom terminal 310 and the second intercom terminal 320.

[0069] For example, the third intercom terminal 330 can be wall-mounted, and the number of the third intercom terminal 330 can be the same as the number of passenger emergency alarms in the carriage.

[0070] In one embodiment, the third intercom terminal 330 is equipped with an emergency call function; the emergency call function is used to call the first intercom terminal 310. Passengers can activate the emergency call function by pressing the emergency call button, skipping the call queue and directly connecting to the first intercom terminal 310.

[0071] When the third intercom terminal 330 initiates an emergency call request via the emergency call function, the information system controller 100 can trigger an alarm signal in the crew compartment to remind the crew to prioritize handling the emergency. The alarm signal may include at least one of an alarm light and an alarm sound.

[0072] In addition, when the third intercom terminal 330 initiates an emergency call request through the emergency call function, the information system controller 100 can also trigger an alarm signal in the carriage that initiated the emergency call request, provide a response feedback to the passenger who initiated the call, let the passenger know that the emergency call request has been successfully initiated, avoid repeated calls, and remind surrounding passengers to pay attention to the situation on site.

[0073] As an example, the panel of the third intercom terminal 330 can be equipped with features such as a one-button call button, a volume control button, and a call status indicator light to enable functions such as one-button call, volume adjustment, and call status indication. For instance, when a call is in progress, the call status indicator light is red; when a call is ongoing, the call status indicator light is green; and if the call is not connected, the call indicator light is yellow.

[0074] In one embodiment, the third intercom terminal 330 has a built-in noise-canceling microphone and speaker, supporting ambient noise acquisition and automatic volume adjustment to improve call clarity in noisy environments such as train carriages. The speaker output volume conforms to the UIC568 ​​specification.

[0075] In some embodiments provided in this application, the train set onboard intercom system also includes a signal relay module 400.

[0076] The signal relay module 400 is deployed in the target area of ​​the carriage where the signal strength is weak, such as in the target area where the signal strength is lower than the average signal strength.

[0077] The signal relay module 400 is specifically used for: receiving audio signals and control signals such as call requests sent by the carriage controller 200; strengthening the received signals to obtain a stable signal when the signal strength in the target area is lower than a preset threshold; and transmitting the stable signal back to the carriage controller 200. The signals may include audio signals and control signals such as call requests; the preset threshold can be set according to actual needs, for example, it can be -90dBm.

[0078] Therefore, the signal relay module 400, in conjunction with the carriage controller 200, can enhance the intercom signal strength, reduce signal blind spots, improve the signal coverage of the entire carriage, and achieve automatic signal reinforcement, making it more suitable for operational scenarios such as the plateau of the Sichuan-Tibet Railway, dense tunnel groups, or complex carriage structures of EMU trains.

[0079] To further enhance signal strength, the signal relay module 400 can also be deployed on ground-level track sections where there are continuous and dense tunnels along the train route.

[0080] For example, the signal relay module 400 may include a digital repeater and a combining / splitting device.

[0081] The combining and splitting equipment is used to achieve signal combining and signal distribution. The combining and splitting equipment can combine multiple voice and signaling transmissions from each intercom terminal 300 into a single high-speed data stream and upload it to the information system controller 100; and can accurately distribute the voice and control commands issued by the information system controller 100 to the corresponding carriage controller 200.

[0082] Digital repeaters can adopt a dual-timeslot time-division multiple access structure, with each device supporting two independent time slots, enabling channel multiplexing and improving signal transmission efficiency.

[0083] This application also provides a control method for an information system controller, applied to the information system controller in any of the above embodiments, the method comprising: S11: In response to the received call request, establish a communication link between the two intercom terminals.

[0084] S12: When the communication link is connected, the audio signal sent by one intercom terminal in the communication link through the first carriage controller is sent down to the second carriage controller corresponding to the other intercom terminal in the communication link.

[0085] Specifically, the first carriage controller and the second carriage controller are carriage controllers 200 to which the two intercom terminals 300 in the communication link are respectively connected. When any intercom terminal 300 in the communication link transmits an audio signal, the first carriage controller corresponding to that intercom terminal forwards the audio signal to the information system controller 100. The information system controller 100 sends the received audio signal to the second carriage controller corresponding to the other intercom terminal 300 in the communication link. The second carriage controller then transmits the audio signal to the other intercom terminal 300, thereby realizing voice communication between the two intercom terminals 300.

[0086] This application also provides a control method for a carriage controller, applied to the carriage controller in any of the above embodiments, the method comprising: S21: Forward the call request and audio signal initiated by the intercom terminal in the carriage to the information system controller.

[0087] S22: Forward the received audio signal sent by the information system controller to the intercom terminal in the carriage.

[0088] See Figure 3 This figure is an architecture diagram of a train set onboard intercom system provided in an embodiment of this application. The system is adapted to the 8-car Sichuan-Tibet Railway distributed power EMU and is integrated into the passenger information and entertainment system, specifically including: Information System Controller 100: Deployed in Car 5, where the crew compartment is located, it supports DMR digital intercom, is compatible with digital and analog communication modes, adopts the SIP protocol, and has an intercom response time of ≤1 second; it has a TRDP communication interface to achieve information interaction with the train TCMS system; it has reserved RS232 (Recommended Standard 232, serial communication interface standard) communication interface and analog audio interface to achieve seamless integration with the existing broadcasting system and PIS system of the EMU; it has fault self-checking and redundancy backup functions, and the automatic switching time between the main and backup control units is ≤3 seconds.

[0089] Carriage Controller 200: One unit is deployed in each carriage, for a total of 8 units. It is connected to the Information System Controller 100 via a gigabit Ethernet bus. It integrates an audio processing module and an audio power amplifier module, and is responsible for the signal access, audio forwarding and status monitoring of the third intercom terminal 330 in this carriage. It works with the signal relay module 400 to achieve signal reinforcement.

[0090] The first intercom terminal 310 is a fixed terminal installed in the crew room of carriage 5. It is linked with the information system controller 100 in carriage 5 and the passenger service intelligent display screen in the crew room. It supports single call, group call and all call functions, operates on a frequency band of 400MHz, and has a co-frequency signal suppression of ≥-12dB.

[0091] The first intercom terminal 310 can be powered by wired power, eliminating the need for charging and ensuring stable operation around the clock.

[0092] The first intercom terminal 310 is equipped with a high-definition display screen and operation buttons. It can display the carriage number from which the call originates, the call type, and the call duration. It can set the priority of emergency calls, and an emergency call request can interrupt the call corresponding to a normal call request. It has a call queuing function and can store no less than 10 missed call records, and mark the carriage from which the missed call originated.

[0093] The second intercom terminal 320 is compatible with the original in-car telephones of the EMU and is deployed in the driver's cab of carriage 1 and carriage 8, with a total of 2 units.

[0094] The second intercom terminal 320 establishes a communication link with the first intercom terminal 310 and the third intercom terminal 330 through a gigabit Ethernet bus, a UIC568 ​​audio bus and an information system controller 100. It can receive calls from passengers and crew members, and can also actively call crew members. It retains the original intercom function between drivers and the original intercom function between drivers and crew members.

[0095] The third intercom terminal 330: The number of units deployed is the same as the number of emergency alarm devices for passengers on the Sichuan-Tibet EMU, a total of 20 units (3 units in car 1, 2 units in car 2, 2 units in car 3, 2 units in car 4, 4 units in car 5, 2 units in car 6, 2 units in car 7, and 3 units in car 8). It adopts a wall-mounted structure and can be installed at both ends of the carriage and in the passenger area.

[0096] The third intercom terminal 330 has a built-in noise-canceling microphone and speaker, supports environmental noise collection and automatic volume adjustment, and the output volume meets the requirements of UIC568 ​​specification. The third intercom terminal 330 is equipped with a call button, a volume adjustment button and a status indicator. After a passenger presses the call button, the call request is forwarded by the carriage controller 200 in this carriage to the information system controller 100 in carriage 5. The information system controller 100 then dispatches and distributes the request to the corresponding first intercom terminal 310 in carriage 5.

[0097] Therefore, when a passenger needs to call the conductor, the passenger can press the call button on the third intercom terminal 330 in their carriage. The third intercom terminal 330 sends a call request to the carriage controller 200 in its carriage. The carriage controller 200 forwards the call request to the information system controller 100 in carriage 5 via a gigabit Ethernet bus. The information system controller 100 dispatches and assigns the request to the corresponding first intercom terminal 310 in carriage 5. The display screen of the first intercom terminal 310 shows the carriage number that initiated the call and emits a prompt tone. When the conductor presses the answer button on the first intercom terminal 310, a two-way intercom can be established with the passenger. At this time, the status indicator light of the third intercom terminal 330 turns green, and the display screen of the first intercom terminal 310 simultaneously shows that it is in a "calling" state. After the call ends, if either party hangs up, the status of the intercom terminal returns to the "no call" state.

[0098] When a flight attendant needs to call a passenger, the flight attendant can initiate a call request by entering the carriage number of the target passenger's carriage through the fixed first intercom terminal 310 in the flight attendant's compartment of carriage 5. The information system controller 100 will then dispatch the third intercom terminal 330 of the target carriage to sound a prompt tone. The passenger can then press the answer button to establish a two-way intercom. If the passenger does not answer, the call request will continue to be displayed for 30 seconds before automatically hanging up. The first intercom terminal 310 will then record the unanswered call in the target carriage.

[0099] When a crew member needs to call the driver, the crew member can press the driver call button on the fixed first intercom terminal 310 in the crew member's compartment of carriage 5 to initiate a call to the second intercom terminal 320. The information system controller 100 directly connects the communication link to realize two-way communication between the crew member and the driver.

[0100] If a passenger presses the emergency call button on the third intercom terminal 330, the call request skips the queue and directly connects to the first intercom terminal 310 in the crew compartment of carriage 5. At the same time, an emergency signal is sent to the information system controller 100. The information system controller 100 triggers the warning lights and high-decibel alerts in the crew compartment of carriage 5, as well as the warning lights and alerts in the carriage that initiated the call, to remind the crew to prioritize handling the emergency call request.

[0101] It should be noted that the various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. The system embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separate. The components indicated as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment solution according to actual needs. Those skilled in the art can understand and implement this without creative effort.

[0102] The above description is merely one specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A train set onboard intercom system, characterized in that, The system, applicable to train sets with multiple carriages, includes: an information system controller with communication connections, a carriage controller, and an intercom terminal. Multiple intercom terminals are deployed in the crew compartment and the passenger area in each carriage; at least one carriage controller is deployed in each carriage. The carriage controller is used to forward call requests and audio signals initiated by the intercom terminal in the carriage to the information system controller; and to forward received audio signals sent by the information system controller to the intercom terminal in the carriage. The information system controller is used to establish a communication link between two intercom terminals in response to a received call request; when the communication link is established, it sends the audio signal sent by the first carriage controller in the communication link to the second carriage controller in the communication link.

2. The system according to claim 1, characterized in that, The intercom terminal includes a first intercom terminal, a second intercom terminal, and a third intercom terminal; The first intercom terminal is deployed in the crew compartment, the second intercom terminal is deployed in the driver's compartment, and the third intercom terminal is deployed in the passenger area; The first intercom terminal is used to receive calls from any intercom terminal, and to call any one, any group of intercom terminals, or all of the second and third intercom terminals. The second intercom terminal is used to receive calls from any intercom terminal, and to call any one of the first intercom terminal and the third intercom terminal. The third intercom terminal is used to receive calls from any intercom terminal, and to call any one of the first intercom terminal and the second intercom terminal.

3. The system according to claim 2, characterized in that, The step of establishing a communication link between two intercom terminals in response to a received call request includes: In response to a call request from a target third intercom terminal to a first intercom terminal, a target first intercom terminal is determined from multiple first intercom terminals based on the correspondence between multiple sets of first intercom terminals and carriage identifiers, and the carriage identifier corresponding to the target third intercom terminal; each set of first intercom terminals includes at least one first intercom terminal. Establish a communication link between the target third intercom terminal and the target first intercom terminal.

4. The system according to claim 2, characterized in that, If the first intercom terminal receives an emergency call request while processing a normal call request, it will interrupt the call corresponding to the normal call request and connect the call corresponding to the emergency call request.

5. The system according to claim 2, characterized in that, The first intercom terminal is equipped with a display screen; The display screen is used to display the initiating carriage identifier corresponding to the call request and the type of call request; the types of call requests include at least normal and emergency.

6. The system according to claim 2, characterized in that, The first intercom terminal has a built-in digital relay module; The digital relay module is used to amplify and shape the audio signal forwarded by the carriage controller and the audio signal to be sent to the carriage controller.

7. The system according to claim 2, characterized in that, The third intercom terminal is equipped with an emergency call function; the emergency call function is used to call the first intercom terminal. When the third intercom terminal initiates an emergency call request through the emergency call function, the information system controller triggers an alarm signal in the crew cabin; the alarm signal includes at least one of an alarm light and an alarm sound.

8. The system according to claim 2, characterized in that, In each carriage, the number of the third intercom terminals is the same as the number of passenger emergency alarms in the carriage.

9. The system according to claim 1, characterized in that, The carriage controller includes an audio processing module and an audio amplifier module; The audio processing module is used to preprocess the received audio signal and forward the amplified audio signal to the information system controller or the intercom terminal in the carriage. The audio power amplifier module is used to amplify the power of the pre-processed audio signal.

10. The system according to claim 1, characterized in that, The system also includes: a signal relay module; The signal relay module is deployed in the target area of ​​the carriage where the signal strength is lower than the average signal strength, and is used for: Receive signals sent by the carriage controller; When the signal strength in the target area is lower than a preset threshold, the received signal is enhanced to obtain a stable signal; The stable signal is then transmitted back to the carriage controller.

11. The system according to claim 10, characterized in that, The signal relay module includes a digital repeater station; The digital repeater station adopts a dual-timeslot time-division multiple access structure.

12. The system according to claim 1, characterized in that, The information system controller uses the Session Initiation Protocol (SIP) to establish a call link.

13. The system according to claim 1, characterized in that, The information system controller uses the Digital Mobile Radio (DMR) communication standard to implement digital intercom communication.

14. The system according to claim 1, characterized in that, The information system controller is located in the first carriage where the crew compartment is situated.

15. A control method for an information system controller, characterized in that, The method, applied to the information system controller according to any one of claims 1 to 14, comprises: In response to a received call request, a communication link is established between the two intercom terminals; When the communication link is established, the audio signal sent by one intercom terminal in the communication link through the first carriage controller is sent down to the second carriage controller corresponding to the other intercom terminal in the communication link.

16. A control method for a carriage controller, characterized in that, The method, applied to the carriage controller according to any one of claims 1 to 14, comprises: The call request and audio signal initiated by the intercom terminal in the carriage are forwarded to the information system controller. The received audio signal sent by the information system controller is forwarded to the intercom terminal in the carriage.

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