Railway vehicle emergency communication system
The emergency notification system for railway vehicles uses proportional voltage control and visual indicators to determine the number and type of emergency calls, enhancing communication and response efficiency.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- YAWATA ELECTRIC INDUSTRIAL CO LTD
- Filing Date
- 2022-06-29
- Publication Date
- 2026-06-26
AI Technical Summary
Existing emergency notification systems for railway vehicles fail to accurately determine the number of emergency notification operations performed, particularly when passengers evacuate or when vehicles lack monitoring devices.
The system includes multiple emergency notification devices with controllers that apply voltages proportional to the number of activated devices, using lamps and side lights to indicate the number and type of emergency calls, and allows for simultaneous communication between passengers and crew.
Enables accurate determination of the number and type of emergency calls, facilitating effective communication and response by the crew.
Smart Images
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Abstract
Description
Technical Field
[0006] , ,
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[0001] The present invention relates to an emergency notification system for railway vehicles.
Background Art
[0002] Conventionally, there has been an emergency notification device mounted on a railway vehicle for making an emergency notification from a passenger compartment to a crew member (see, for example, Patent Document 1).
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] An object of the present invention is to provide an emergency notification system for a railway vehicle that can suitably grasp the number of emergency notification operations using an emergency notification device in the railway vehicle.
Means for Solving the Problems
[0005] One aspect of the present invention is an emergency notification system for a railway vehicle, including: two or more emergency notification devices arranged in the passenger compartment of the railway vehicle; and a controller that controls application of a predetermined voltage to a wiring provided between each passenger compartment and the crew's compartment when an emergency notification operation is performed on the emergency notification device, wherein the controller applies a voltage having a magnitude corresponding to the number of emergency notification devices on which the emergency notification operation has been performed to the wiring.
[0006] Furthermore, one aspect of the present invention may further include a configuration comprising: a plurality of emergency call buttons provided in the emergency call device, corresponding to the type of emergency call; and at least one lamp located in the driver's cab of the railway vehicle, which lights up or flashes in a pattern corresponding to the type of emergency call that corresponds to the pressed emergency call button among the plurality of emergency call buttons. The at least one lamp may be located in the driver's cab, in the passenger compartment, or in both the driver's cab and the passenger compartment. [Effects of the Invention]
[0007] According to the present invention, the number of times an emergency call is made using an emergency call device inside a railway vehicle can be appropriately determined. [Brief explanation of the drawing]
[0008] [Figure 1] Figure 1 shows an example of an emergency notification system for a railway vehicle. [Figure 2] Figure 2 shows an example of the configuration of the emergency notification system for a railway vehicle according to the embodiment, mainly on the passenger compartment side. [Figure 3] Figure 3 shows an example of the configuration of the emergency communication system for a railway vehicle according to the embodiment, mainly on the driver's cab side. [Modes for carrying out the invention]
[0009] The emergency communication system for a railway vehicle according to an embodiment will be described below with reference to the drawings. The configuration of the embodiment is illustrative, and the present invention is not limited to the configuration of the embodiment.
[0010] <Reference example>
[0011] Figure 1 shows an emergency communication system for a railway vehicle as an example. In Figure 1, railway vehicle 1 constitutes a train consisting of one or more vehicles. A train consists of a leading vehicle and intermediate vehicles. Leading vehicles are positioned at the front and rear of the train of multiple vehicles. However, they may also be positioned only at the front. Intermediate vehicles are positioned between the leading vehicles. In the example shown in Figure 1, only leading vehicles are shown. Leading vehicles are equipped with a crew compartment 2 and a passenger compartment 3. Intermediate vehicles are also called passenger cars.
[0012] The crew compartment 2 is equipped with a signal receiving controller 20a, a communication receiver 4 connected to the signal receiving controller 20a, and a microphone 5 and speaker 5b connected to the communication receiver 4. The communication receiver 4 is connected to a "confirm" button 31, a "hold" button 32, a "reset" button 33, a lamp 34 indicating "radio," a lamp 35 indicating "notification," a lamp 36 indicating "confirm," a lamp 37 indicating "hold," and a speaker 38 for a buzzer. The communication receiver 4 controls the lighting and extinguishing of lamps 34-37. Lamp 34 lights up when the radio is in use. Lamp 35 lights up when an emergency notification is received. Lamp 36 lights up when the "confirm" button 31 is pressed. Lamp 37 lights up when the "hold" button 33 is pressed (on) to put a call on hold.
[0013] On the other hand, each passenger compartment 3 of the railway vehicle 1 is equipped with one or more (four in the example in Figure 1) emergency communication devices 10 and a communication controller 20 to which each of the emergency communication devices 10 is connected. Two or more emergency communication devices 10 are provided in the passenger compartments 3 of the railway vehicle 1. "Two or more emergency communication devices 10 provided in the passenger compartments 3 of the railway vehicle 1" includes the case in which two or more emergency communication devices 10 are provided in one passenger compartment 3 within the railway vehicle 1, and the case in which one or more emergency communication devices 10 are provided in each of two or more passenger compartments 3 within the railway vehicle 1, for a total of two or more emergency communication devices 10.
[0014] Each of the emergency communication devices 10 includes a speaker 11 and microphone 12 for communicating with the crew in an emergency, an emergency communication button 13, a lamp 14 indicating "communication possible", a reset button 15, and a speaker 16 for a buzzer. Additionally, side lights 28a and 28b are mounted on both sides of the vehicle. A communication controller 20 is provided for each vehicle if the train set of railway vehicles 1 consists of two or more vehicles. In this case, a through-wire running between vehicles can be used as the audio line 10a.
[0015] In the example, an emergency notification using the emergency notification device 10 is performed as follows: In the event of an emergency in the passenger cabin 3, passengers can press the emergency notification button 13 on the emergency notification device 10 as an emergency notification operation. The emergency notification operation initiates the emergency notification process.
[0016] When the emergency call button 13 is pressed, the emergency call device 10 emits a buzzer sound from the speaker 16, sounding a buzzer in the passenger compartment 3. The emergency call device 10 also inputs a signal indicating that the emergency call button 13 has been pressed as an emergency call signal to the call controller 20. Upon receiving the emergency call signal from the emergency call device 10, the call controller 20 turns on switch S1 and applies (pressures) a bias voltage of a predetermined voltage (e.g., 100V) from the voltage source V1 to the emergency call passenger compartment audio line (audio line) 10a connecting the call controller 20 and the receiving controller 20a. Note that, in addition to the audio line, a dedicated wiring (dedicated call line) for pressurization may be provided. In other words, the wiring to be pressurized may be an audio line or a dedicated call line, and existing wiring other than the audio line may be used for pressurization as long as it does not cause any effect from the pressurization. The audio line, dedicated call line, and existing wiring are examples of "(wiring to be pressurized)". The following describes the case where the wiring to be pressurized is the audio line 10a.
[0017] Furthermore, in vehicles where the emergency call button 13 is pressed, the vehicle side lamp 2 is activated by the application of a bias voltage. When lights 8a and 29b are illuminated, the vehicle from which the emergency call has been made can be seen from outside the railway vehicle 1. In addition, if the railway vehicle 1 is equipped with a train information management device (also called a monitoring device), the pressing of the emergency call button 13 is notified to the monitoring device. The monitoring device is a device that collects and manages information indicating the status of the railway vehicle 1. The railway vehicle 1 may not be equipped with a monitoring device.
[0018] The alarm controller 20a detects pressure on the audio line 10a and inputs a signal indicating the detection of pressure as an emergency alarm signal to the communication receiver 4. Upon receiving the emergency alarm signal from the alarm controller 20a, the communication receiver 4 emits a buzzer sound from the speaker 38 and illuminates the "Notification" lamp 35. The crew can understand that an emergency alarm has occurred from the sound of the buzzer and the illumination of the lamp 35. The crew picks up the handset of the communication receiver 4 (equipped with a microphone 5a and speaker 5b) and presses the "Confirm" button 31. Alternatively, the handset may have a separate microphone and speaker. When the communication receiver 4 detects that the button 31 has been pressed, it stops emitting the buzzer sound from the speaker 38. The communication receiver 4 also turns off the lamp 35 and illuminates the "Confirm" lamp 36.
[0019] The communication receiver 4 sends a signal (referred to as a confirmation signal) to the communication controller 20a indicating that the "confirm" button 31 has been pressed. The confirmation signal is input to the emergency communication device 10, where button 13 was pressed, via the audio line 10a and the communication controller 20. Upon receiving the confirmation signal, the emergency communication device 10 stops the buzzer sound emitted from the speaker 16 and turns on the speaker 11 and microphone 12, enabling communication with the crew in the crew compartment 2. At this time, the emergency communication device 10 illuminates the "communication possible" lamp 14. After that, if the crew wishes to end the call, they press the reset button 33. The passenger can also end the call by pressing the reset button 15.
[0020] In addition, when the emergency call buttons 13 of a plurality of (n units) of emergency call devices 10 are pressed, the behavior varies depending on the timing of the pressing. If, between the pressing of the emergency call button 13 of a certain emergency call device 10 and the pressing of the "confirmation" button 31 in the crew's cabin 2 when the voice line 10a is pressurized, the emergency call buttons 13 of n units (two or more) of emergency call devices 10 including a certain emergency call device 10 are pressed, then when the "confirmation" button 31 is pressed, a confirmation signal is transmitted to each of the emergency call devices 10 for which the emergency call button 13 has been pressed, enabling simultaneous communication between the n units of emergency call devices 10 and the crew. After that, if the emergency call button 13 of another emergency call device 10 is pressed, an emergency call signal is transmitted to the communication receiver 4. When the crew presses the "confirmation" button 31, a confirmation signal is sent to the other emergency call devices 10, enabling simultaneous communication. Simultaneous communication using two or more emergency call devices 10 may be carried out within one vehicle or may span multiple vehicles.
[0021] Each of the emergency call device 10, the call controller 20, the receiving controller 20a, and the communication receiver 4 includes a processor such as a CPU (Central Processing Unit) and a memory, and can perform the above-described processes through software processing of the processor (processing in which the processor executes a program stored in the memory). The software processing can also be executed through processing using hardware such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array) (semiconductor devices such as integrated circuits).
[0022] When a serious incident such as injury or fire occurs, whether or not a plurality of emergency call buttons 13 have been pressed can be grasped by the crew when a simultaneous call between the crew and a plurality of passengers is established. However, if a passenger who pressed the emergency call button 13 evacuates from the vehicle, a call with that passenger cannot be established. In this case, if there is only one passenger for the call, the crew cannot determine whether or not a plurality of emergency call buttons 13 have been pressed based on the number of passengers in the conversation. Also, since the monitor device is notified of the pressing of the emergency call button 13 in each vehicle, even when there is only one passenger in the conversation, it can be determined that there have been emergency calls from a plurality of vehicles. However, such a determination cannot be made for railway vehicles not equipped with a monitor device. Furthermore, since the side lights 28a and 28b of the vehicle light up on a vehicle-by-vehicle basis, if the crew can visually recognize the side lights 28a and 28b of each vehicle, it can be determined whether an emergency call has been made from a plurality of vehicles. However, such visual recognition cannot be achieved, and the crew cannot grasp whether or not a plurality of emergency call buttons 13 have been pressed. In the embodiments described below, such problems are solved, and the number of emergency call operations using the emergency call device in the railway vehicle can be suitably grasped.
[0023] <Embodiment>
[0024] FIG. 2 is a diagram showing a configuration example mainly on the passenger compartment side of the emergency call system of the railway vehicle 1 according to the embodiment. FIG. 3 is a diagram showing a configuration example mainly on the driver's cab side of the emergency call system of the railway vehicle 1 according to the embodiment. Since the emergency call system according to the embodiment has a configuration common to the reference example, the same reference numerals are given to the same configurations as in the reference example, and the description is appropriately omitted.
[0025] In Figure 2, the emergency notification system according to the embodiment differs from the reference example in the following respects. Firstly, the notification controller 20 is capable of applying two or more different voltages to the audio line (through wire) 10a. In the example shown in Figure 2, there is a switch S1 that applies a first voltage (for example, a voltage value of 90V) from a voltage source V1, and a switch S2 that applies a second voltage (for example, a voltage value of 100V) from a voltage source V2. The number of voltage values may be more than two, and the magnitude of the voltage values can be set as appropriate. For example, a first voltage value of 25V, a second voltage value of 50V, a third voltage value of 75V, and a fourth voltage value of 100V, etc. For example, voltage sources and switches for the voltages applied to the audio line 10a are provided according to the number of voltage values. Note that D1, D2, and D in Figure 2 are diodes for preventing reverse current.
[0026] The notification controller 20 applies a voltage to the audio line 10a that corresponds to the number of times the emergency notification button 13 has been pressed, i.e., the number of emergency notification devices 10 whose emergency notification buttons have been pressed (an emergency notification operation has been performed). In the example shown in Figure 2, if the number of emergency notification devices 10 whose emergency notification button 13 has been pressed is 1, the notification controller 20 turns on switch S1 and applies a voltage of 90V to the audio line 10a. Conversely, if the number of emergency notification devices 10 whose emergency notification button 13 has been pressed is 2 or more, the notification controller 20 turns on switch S2 and applies a voltage of 100V to the audio line 10a.
[0027] The notification controller 20 can, for example, detect the voltage value applied to the audio line 10a upon receiving an emergency notification signal from each emergency notification device 10. The voltage value can be detected using information indicating the on / off state of switches S1 and S2 (S1 ON → determined to be 90V). Alternatively, the voltage value may be detected by measuring the voltage across the audio line 10a. When the notification controller 20 receives an emergency notification signal, it detects the voltage value applied to the audio line 10a, and if it detects an already applied voltage value, it applies a voltage value one step higher than that value to the audio line 10a. For example, if the notification controller 20 detects a voltage value of 90V (or 25V), it applies a voltage value of 100V (50V), one step higher than that, to the audio line 10a.
[0028] In this embodiment, the emergency notification device 10 has multiple (two or more) lamps 14. In the example shown in Figure 2, the emergency notification device 10 has multiple lamps 14 (three lamps 14a, 14b, and 14c in the example of Figure 2). The number of lamps 14 can be any number as long as it is two or more. The notification controller 20 sends a signal indicating the voltage value applied to the audio line 10a to the emergency notification device 10 when the emergency notification button 13 is pressed, and the emergency notification device 10 then... The lamp 14 is illuminated in a lighting or flashing pattern (including combinations of lighting and flashing) according to the voltage value. This allows passengers to determine the number of emergency communication devices 10. Even if there is only one lamp 14, the number of emergency communication devices 10 can be determined by flashing the lamp 14 in a flashing pattern according to the voltage value.
[0029] Furthermore, with respect to the side lights 28a and 29b, the notification controller 20 controls the flashing of the side lights 28a and 28b in a flashing pattern corresponding to the voltage value applied to the audio line 10a, thereby allowing the number of emergency notification devices 10 to be determined from outside the railway vehicle 1. Alternatively, the number of side lights 28 installed on one side of the vehicle may be set to two or more, and the illumination or flashing of the side lights 28 may be controlled in a way that corresponds to the voltage value.
[0030] In Figure 3, the receiving controller 20a according to the embodiment detects the voltage value applied to the audio line 10a by measurement or other means, and inputs a signal indicating the detected voltage value to the communication receiver 4. Multiple lamps 35 (35a, 35b, and 35c) are connected to the communication receiver 4. The communication receiver 4 uses at least one of the multiple lamps 35 to control the lighting or flashing of the lamp 35 in a lighting or flashing pattern (including a combination pattern of lighting and flashing) according to the voltage value. This allows the crew to know the number of emergency communication devices 10.
[0031] Returning to Figure 2, the emergency notification device 10 according to this embodiment has a plurality of emergency notification buttons 13 (13a, 13b, and 13c in the example shown in Figure 2). The emergency notification buttons 13a, 13b, and 13c are provided in correspondence to the type (category) of abnormal situation that occurs in the guest room 3. For example, when smoke or fire occurs in the guest room, press emergency notification button 13a; when injury occurs, press emergency notification button 13b; and for other abnormal situations (such as a sudden illness), press emergency notification button 13c. However, the number of emergency notification buttons 13 and the type of abnormal situation assigned to each button 13 can be set as appropriate.
[0032] Information (signals) indicating that the emergency call button 13 has been pressed is input to the communication receiver 4 via the audio line 10a and the alarm controller 20a. The communication receiver 4 can vary (differenten) the buzzer sounding pattern output from the speaker 38 according to the number of emergency call devices 10 whose emergency call buttons 13 have been pressed.
[0033] Furthermore, the communication receiver 4 illuminates one of the lamps 35a, 35b, or 35c corresponding to the information indicating the emergency call button 13. In this embodiment, lamp 35a is associated with the emergency call button 13a, lamp 35b is associated with the emergency call button 13b, and lamp 35c is associated with the emergency call button 13c. Therefore, if the information indicating the emergency call button 13 indicates button 13a, the communication receiver 4 illuminates lamp 35a. If the information indicating the emergency call button 13 indicates button 13b, the communication receiver 4 illuminates lamp 35a. If the information indicating the emergency call button 13 indicates button 13c, the communication receiver 4 illuminates lamp 35c.
[0034] The crew can determine the type of emergency that occurred in the passenger cabin 3 by observing the illumination or extinguishing status of lamps 35a, 35b, and 35c. The correspondence between buttons 13 and lamps 35 is just an example; it is sufficient if the pressed button 13 (type of emergency) can be determined from the illumination or flashing pattern of lamps 35. In this case, the number of emergency communication devices 10 can be determined from the illumination or flashing pattern. Providing multiple buttons 13 and lamps 35 according to the type of emergency is optional and not a mandatory configuration requirement. There may be only one button 13 and one lamp 35. Even in this case, as described above, the number of emergency communication devices 10 whose emergency communication buttons 13 were pressed can be determined from the flashing pattern corresponding to the voltage value.
[0035] The light sources for lamp 14, vehicle side lights 28, and lamp 35 may be incandescent bulbs, light-emitting diodes (LEDs), or organic ELs.
[0036] As shown in Figure 2, a broadcasting device 6 is located in the crew compartment 2, and the broadcasting device 6 is connected to an output amplifier (amplifier) 8 via a transmission path (signal line) 7 for broadcasting audio signals. The audio signal output from the output amplifier 8 is connected to speakers 9, which are connected to the wiring 9a, via a switch 23 and wiring 9a, and each speaker 9 emits sound corresponding to the audio signal. In this way, the audio signal for automatic announcements generated by the broadcasting device 6 and the voice signals of the crew input from the microphone are connected to the speakers 9 and broadcast into the passenger compartment 3.
[0037] In this embodiment, a series circuit of a microphone amplifier 24, a filter 25, and a line amplifier 26 is connected to switch 23, and the output of the line amplifier 26 is connected to switch 27 provided on the audio line 10a. The operation of switches 23 and 27 is controlled, for example, by an emergency control unit 20. When the emergency control unit 20 detects that the emergency call button 13 of the emergency call device 10 has been pressed, it controls switch 23 so that the wiring 9a and the microphone amplifier 24 are connected, and controls switch 27 so that the line amplifier 26 is connected to the audio line 10a. As a result, when the emergency call button 13 is pressed, the sound inside the passenger compartment 3, collected by speaker 9, is sent to the communication receiver 4, and the crew can listen to it using speaker 5b or record the sound using a recording device. By listening, the crew can understand the situation inside the passenger compartment 3.
[0038] In this embodiment, the emergency communication system for a railway vehicle 1 having a crew compartment 2 and a passenger compartment 3 comprises the following: two or more emergency communication devices 10 arranged in the passenger compartment 3 of the railway vehicle 1, and a communication controller 20 (an example of a controller; other than the communication controller 20 is also possible) that controls the application of a predetermined voltage to an audio line 10a (an example of wiring) provided between the passenger compartment 3 and the crew compartment 2 when an emergency communication operation (pressing a button 13, or other operation) is performed on the emergency communication device 10. The communication controller 20 controls the application of a voltage to the audio line 10a that is proportional to the number of emergency communication devices 10 that have been operated for emergency communication. According to this embodiment, it is possible to determine the number of emergency communication devices from the magnitude of the voltage.
[0039] The notification controller 20 can detect the voltage value applied to the audio line 10a when applying a predetermined voltage to the audio line 10a, and can apply a voltage greater than the detected voltage value. In addition, the notification controller 20 can determine the number of emergency notification devices 10 that have performed an emergency notification operation from the voltage value applied to the audio line 10a, and can apply a voltage corresponding to the determined number plus 1 (a voltage one step higher than the current voltage value).
[0040] The emergency notification system according to the embodiment further includes buzzers (speakers 16, 38) that sound in response to an emergency notification operation, and the buzzer sounding pattern can be configured to vary according to the number of emergency notification devices 10 that have been operated for emergency notification. In this embodiment, the buzzers (speakers 16, 38) are located in both the passenger compartment 3 and the crew compartment 2, but the buzzers may be located in at least one of the passenger compartment 3 and the crew compartment 2.
[0041] Furthermore, the emergency notification system according to this embodiment further includes one or more lamps (lamp 14, side lamp 28, lamp 35) that light up or flash in response to an emergency notification operation, and the lighting or flashing pattern of one or more lamps can be configured to vary (differ) depending on the number of emergency notification devices 10 that have been operated for emergency notification. One or more lamps can be configured to be located in the passenger compartment 3, the crew compartment 2, or both the passenger compartment 3 and the crew compartment 2.
[0042] Furthermore, the emergency notification system according to the embodiment may further include a plurality of emergency notification buttons 13a, 13b, and 13c provided in the emergency notification device 10, corresponding to the type of emergency notification, and at least one lamp that lights up or flashes in a pattern corresponding to the type of emergency notification corresponding to the pressed emergency notification button 13 among the plurality of emergency notification buttons 13a, 13b, and 13c. In the embodiment, lamps 14 and 35 were exemplified as the at least one lamp, but at least one of lamps 14 and 35 can be used as the at least one lamp. This makes it easier to understand the type of emergency notification (allows for appropriate understanding). The configuration of the embodiment described above can be modified as appropriate without departing from the object of the present invention. [Explanation of Symbols]
[0043] 1. Railway vehicles 2. Crew Room 3. Guest Rooms 4. Contact receiver 5...Handset 6. Broadcasting equipment 7. Transmission path of broadcast audio signals 8. Power amplifier 9. Speakers 9a...Wiring 10a...Audio line 10...Emergency notification device 11. Earpiece speaker 12. Microphone for transmitting. 13. Emergency call button 14,35... lamp 20.. Notification Controller 20a... Receiving controller
Claims
1. An emergency communication system for a railway vehicle having a crew compartment and a passenger compartment, Two or more emergency communication devices are placed inside the passenger compartment of the aforementioned railway vehicle, When an emergency notification operation is performed on the emergency notification device, a controller controls the application of a predetermined voltage to the wiring provided between the passenger compartment and the crew compartment. Equipped with, The controller controls the application of a voltage to the wiring that is proportional to the number of emergency alarm devices for which the emergency alarm operation was performed. An emergency notification system for railway vehicles characterized by the following features.
2. When the controller applies a predetermined voltage to the wiring, it detects the voltage value applied to the wiring and applies a voltage greater than the detected voltage value. The railway vehicle emergency notification system according to claim 1.
3. The controller determines the number of emergency alarm devices for which the emergency alarm operation has been performed based on the voltage value applied to the wiring, and applies a voltage corresponding to the determined number plus 1. The railway vehicle emergency notification system according to claim 2.
4. The system further includes a buzzer that sounds in response to the aforementioned emergency notification operation, The buzzer's sounding pattern varies depending on the number of emergency alarm devices that have been activated. An emergency notification system according to any one of claims 1 to 3.
5. The buzzer is located in the passenger compartment, the crew compartment, or both the passenger compartment and the crew compartment. The railway vehicle emergency notification system according to claim 4.
6. The system further includes one or more lamps that light up or flash in response to the aforementioned emergency notification operation. The pattern of lighting or flashing of the one or more lamps varies according to the number of emergency alarm devices for which the emergency alarm operation was performed. An emergency notification system for a railway vehicle according to any one of claims 1 to 3.
7. The one or more lamps are located in the passenger compartment, the crew compartment, or both the passenger compartment and the crew compartment. The railway vehicle emergency notification system according to claim 6.
8. The one or more lamps mentioned above are side lights. The railway vehicle emergency notification system according to claim 6.
9. The aforementioned emergency notification device is equipped with multiple emergency notification buttons corresponding to the type of emergency notification, The railway vehicle includes at least one lamp that lights up or flashes in a pattern corresponding to the type of emergency call that corresponds to the pressed emergency call button, among the multiple emergency call buttons. The railway vehicle emergency notification system according to claim 1, further comprising: