Information processing device and bell buzzer unit

Abstract

The present invention provides an information processing device and a bell buzzer unit that can generate warning sounds corresponding to the route section without installing additional bell buzzers. [Solution] An information processing device according to one embodiment of the present invention comprises an acquisition unit, a storage unit, a signal generation unit, and a data update unit. The acquisition unit acquires driving information detected by a group of sensors installed in the vehicle and location information relating to the current location of the vehicle. The storage unit stores a plurality of audio data corresponding to the type of driving information. The signal generation unit generates an audio signal to be output from an audio generator based on the audio data corresponding to the driving information. The data update unit determines, based on the location information, whether the current location of the vehicle belongs to a predetermined specific section, and when it determines that the current location belongs to the specific section, it updates at least a portion of the plurality of audio data stored in the storage unit with other audio data corresponding to the driving information.

Description

Technical Field

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[0001] The present invention relates to an information processing device and a bell buzzer unit installed on the driver's cab of a railway vehicle, for example.

Background Art

[0002] On the driver's cab of a railway vehicle, in addition to various indicators that display driving information necessary for driving the vehicle, such as a speedometer, an overhead line voltage meter, and a pressure gauge, a bell buzzer unit that emits an alarm sound corresponding to the above driving information is installed. For example, Patent Document 1 discloses a control system that can easily recognize an alarm sound even when a plurality of devices sound simultaneously.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In recent years, there has been an increase in commercial operations (through running) in which multiple railway operators enter each other's lines with their vehicles. In this case, it may be necessary to newly install a bell buzzer device for sounding an alarm sound specific to the vehicles of the other operator on the vehicles entering the lines of other companies.

[0005] In view of the above circumstances, an object of the present invention is to provide an information processing device and a bell buzzer unit that can generate an alarm sound corresponding to a line section without installing an additional bell buzzer.

Means for Solving the Problems

[0006] An information processing device according to one aspect of the present invention includes an acquisition unit, a storage unit, a signal generation unit, and a data update unit. The acquisition unit acquires driving information detected by a group of sensors installed on the vehicle, and location information relating to the vehicle's current position. The memory unit stores multiple audio data corresponding to the types of driving information. The signal generation unit generates an audio signal to be output from the audio generator based on the audio data corresponding to the driving information. The data update unit determines, based on the location information, whether the vehicle's current location belongs to a predetermined specific section, and when it determines that the current location belongs to the specific section, it updates at least a portion of the multiple voice data stored in the storage unit with other voice data corresponding to the driving information.

[0007] The information processing device may further include a communication unit capable of receiving the other audio data before the vehicle reaches the specific section.

[0008] The aforementioned specific section may also be a section where the driver is on duty.

[0009] The vehicle in question is a railway vehicle, and the specified section may be a section of another company's railway line.

[0010] When the signal generation unit generates the audio signal based on the plurality of audio data, it may be configured to synthesize each audio data to generate the audio signal.

[0011] The aforementioned audio signal may be an alarm sound that is pre-set individually according to the type of driving information.

[0012] The vehicle is a railway vehicle, and the operation information may include at least one of the following: instrument information of the railway vehicle, equipment monitoring information of the railway vehicle, and information related to the ATS (Automatic Train Stop) system.

[0013] A bell buzzer unit according to one embodiment of the present invention comprises a speaker, an acquisition unit, a storage unit, a signal generation unit, and a data update unit. The aforementioned speaker is installed in the driver's cab of the vehicle. The acquisition unit acquires driving information detected by a sensor group installed in the vehicle and position information regarding the current position of the vehicle. The storage unit stores a plurality of voice data corresponding to the types of the driving information. The signal generation unit generates a voice signal to be output from the speaker based on the voice data corresponding to the driving information. The data update unit determines whether the current position of the vehicle belongs to a preset specific section based on the position information, and when it is determined that the current position belongs to the specific section, at least a part of the plurality of voice data stored in the storage unit is updated with other voice data corresponding to the driving information.

Advantages of the Invention

[0014] According to the present invention, it is possible to generate an alarm sound corresponding to a route section without installing an additional bell buzzer.

Brief Description of the Drawings

[0015] [Figure 1] It is a block diagram showing the configuration of an information processing apparatus according to an embodiment of the present invention. [Figure 2] It is a circuit diagram showing an example of an equivalent circuit of a voice processing unit in the information processing apparatus. [Figure 3] It is a flowchart showing a processing procedure executed in the information processing apparatus. [Figure 4] It is a flowchart showing another processing procedure executed in the information processing apparatus. [Figure 5] It is a flowchart showing still another processing procedure executed in the information processing apparatus.

Modes for Carrying Out the Invention

[0016] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0017] [Overall Configuration] FIG. 1 is a block diagram showing the configuration of an information processing apparatus 100 according to an embodiment of the present invention. The information processing apparatus of the present embodiment functions as a control device for a valve buzzer unit 1 installed in the cab of a railway vehicle.

[0018] The valve buzzer unit 1 includes an information processing apparatus 100 and a speaker 200.

[0019] The information processing apparatus 100 generates an audio signal related to various driving information (speed, air pressure, notch, etc.) detected by a sensor group 2 installed in the vehicle. The audio signal is typically a drive signal input to the speaker 200 to reproduce an alarm sound generated based on the above driving information.

[0020] The speaker 200 is one or more audio generators that reproduce the audio signal generated by the information processing apparatus 100, and is a valve buzzer in the present embodiment. The reproduced sound output from the speaker 200 is not limited to the above alarm sound, and may be a received voice from another composed vehicle or an alarm sound related to a control signal received from outside the vehicle such as an ATS signal.

[0021] As shown in FIG. 1, the information processing apparatus 100 includes an acquisition unit 10, a signal generation unit 20, a storage unit 30, a communication unit 40, an audio processing unit 50, and a data update unit 60. The information processing apparatus 100 is a computer having a CPU (Central Processing Unit) as a control unit and a memory, and at least a part of the acquisition unit 10, the signal generation unit 20, the audio processing unit 50, and the data update unit 60 is configured as a functional block of the CPU.

[0022] Note that instead of or in addition to the CPU, a PLD (Programmable Logic Device) such as an FPGA (Field Programmable Gate Array), or a DSP (Digital Signal Processor), or other ASIC (Application Specific Integrated Circuit) may be used.

[0023] The acquisition unit 10 acquires an input signal that includes driving information detected by the sensor group 2 installed on the vehicle and position information regarding the vehicle's current position. The driving information includes at least one of the following: instrument information of the railway vehicle, equipment monitoring information of the railway vehicle, and information regarding the ATS (Automatic Train Stop) system.

[0024] Sensor group 2 typically consists of speed sensors, voltage sensors, pressure sensors, etc., and outputs monitoring data that monitors instrument data and the status of various devices. The detected values ​​of these sensors group 2 are displayed on various instruments such as speedometers, voltmeters, and pressure gauges located in the driver's cab equipped with operating devices such as a master controller.

[0025] Location information is typically obtained through the transmission and reception of information between ground beacons installed on the tracks and on-board beacons installed on the vehicles. Alternatively, location information may be obtained via a navigation system or a GPS (Global Positioning System) system.

[0026] The signal generation unit 20 is configured to generate an audio signal corresponding to the type of driving information. The audio signal is a different digital signal for each type of driving information, and audio data for playing a pre-set alarm sound according to the type of driving information is pre-stored in the storage unit 30. The signal generation unit 20 generates an audio signal based on one or more audio data corresponding to the driving information acquired by the acquisition unit 10.

[0027] For audio data, for example, a WAV (Waveform Audio File Format) file can be used. The number of audio data (number of channels) is not particularly limited, but in this embodiment, it is set to 12 channels.

[0028] For example, when the signal generation unit 20 determines that the vehicle speed exceeds the speed limit based on the acquired speed data, it generates an audio signal related to the speeding violation by reading audio data for a pre-assigned channel as a speeding warning sound from the storage unit 30 and inputting it to the speaker 200.

[0029] The storage unit 30 is for storing various programs executed by the acquisition unit 10, the signal generation unit 20, and the audio processing unit 50, and is composed of, for example, memory elements such as semiconductor memory and storage devices such as hard disk drives. Furthermore, the storage unit 30 stores the audio data for each channel as described above, as well as position information (their start and end points) related to each specific section (the first specific section and the second specific section) described later. The storage unit 30 is configured to allow arbitrary addition, deletion, updating, etc., of the stored audio data.

[0030] The first type of designated section refers to a section of track where the ambient noise level is above a specified level, and includes, for example, tunnel sections and railway bridge sections. The second type of designated section typically refers to the driver's work section, and includes sections within the company's own lines and sections where the train operates on other companies' lines.

[0031] The communication unit 40 is a communication module for communicating with the vehicle depot, server 3, etc. The communication unit 40 may also include an on-board unit that communicates with ground units when acquiring vehicle location information. In addition, audio data to be stored in the storage unit 20 may be downloaded from server 3 via the communication unit 40.

[0032] Server 3 stores voice data to be used in the second specific section (hereinafter also referred to as update voice data). As will be described later, the communication unit 40 is configured to receive (download) the above update voice data from Server 3 before or after the vehicle reaches the second specific section.

[0033] The audio processing unit 50 is configured to determine whether the vehicle's current location belongs to a predetermined first specific section based on the vehicle's location information acquired by the acquisition unit 10, and if it determines that the current location belongs to the first specific section, it modulates the audio signal using a modulation scheme appropriate to that first specific section.

[0034] The first specific section is typically a section in which a vehicle travels where the ambient noise level is above a predetermined level, and includes, for example, tunnel sections and railway bridge sections. The modulation methods include amplitude modulation, frequency modulation, and phase modulation of the audio signal, and the modulation method optimized for the type of the first specific section is adopted.

[0035] Typically, when traveling through a first specific section, amplitude modulation is employed to increase the output level of the audio signal compared to when traveling through normal sections other than the first specific section. This makes it easier to recognize the necessary warning sound even when ambient noise is louder than usual.

[0036] In this case, a sound-collecting microphone may be installed in the driver's cab to measure the sound pressure level of ambient noise, and the modulation amount of amplitude modulation may be set according to the magnitude of the ambient noise detected by this microphone. Alternatively, the modulation amount may be set individually based on the sound pressure level of ambient noise measured in advance for each specific section, and the sound pressure level may be modulated with a modulation amount corresponding to the type of the first specific section being traveled.

[0037] Furthermore, the form of ambient noise during operation differs between tunnel sections and bridge sections. Even with similar noise levels, amplitude modulation can easily lead to differences in the recognizability (intelligibility) of the reproduced sound. Therefore, it is desirable to be able to optimize the reproduced sound according to the type of operating section. Accordingly, in this embodiment, the audio signal is configured to be modulated using other modulation methods such as frequency modulation or phase modulation, in addition to or instead of amplitude modulation.

[0038] For example, when traveling through a tunnel, the alarm sound may be made more audible by performing frequency modulation that emphasizes the high-frequency components of the audio signal. On the other hand, when traveling over a railway bridge, the alarm sound may be made more audible by performing frequency modulation that emphasizes the low-frequency components of the audio signal.

[0039] When the signal generation unit 20 generates multiple alarm sounds, it reads the corresponding audio data for each channel from the storage unit 30 and generates multiple audio signals based on the individual audio data. The audio processing unit 50 performs a process to synthesize each generated audio signal and plays the synthesized sound through a common speaker 200. Alternatively, if there are multiple speakers 200, the alarm sounds may be played individually through different speakers 200 without synthesizing the audio signals for each channel.

[0040] In this case, the multiple audio data stored in the memory unit 30 may be assigned a priority. For example, an alarm sound warning of speeding needs to be generated with priority over alarm sounds warning of other driving conditions (e.g., voltage drop). Therefore, in this embodiment, if the audio data forming the synthesized sound includes a first audio data and a second audio data with a higher priority than the first audio data, the audio processing unit 50 performs a process to emphasize the second audio data more than the first audio data.

[0041] As an emphasis process, for example, one method is to emphasize the second audio signal by reducing the volume of the audio signal related to the first audio data (hereinafter also referred to as the first audio signal) compared to the audio signal related to the second audio data (hereinafter also referred to as the second audio signal). Alternatively, one method may be to mute the first audio signal and play only the second audio signal.

[0042] The data update unit 60 is configured to update at least a portion of the audio data stored in the storage unit 30 with update audio data received via the communication unit 40.

[0043] The update audio data is common in that it consists of multiple audio data sets stored in the memory unit 30, that is, audio data sets for generating warning sounds that are individually set in advance according to the type of driving information. However, for example, when operating on another company's line, the warning sounds for the same target (e.g., speeding) may be operated with different specifications. Therefore, in this embodiment, audio data that enables the playback of warning sounds specific to such line sections using a common speaker 200 is made downloadable from the server 3 as update audio data. This makes it possible to play multiple sound sources without increasing the capacity of the memory unit 30.

[0044] The data update unit 60 determines whether the vehicle's current location belongs to a pre-set second specific section based on the vehicle's location information acquired by the acquisition unit 10. If it determines that the current location belongs to the second specific section, it is configured to update at least a portion of the multiple voice data stored in the storage unit 30 with other voice data (update voice data) corresponding to the driving information.

[0045] The audio data corresponding to driving information refers, for example, to audio data used to generate a warning sound related to speeding if the driving information concerns speeding. Therefore, if the audio data to be updated is related to speeding, the audio data related to speeding that has been previously stored in the storage unit 30 is overwritten with the updated audio data related to speeding.

[0046] The second designated section refers to the work area for vehicle crew members such as drivers, as described above, and includes work areas within the company's own lines and sections where the train operates on other companies' lines. By updating the audio data in the second designated section with updated audio data, the warning sound can be played back using an audio signal generated based on the updated audio data.

[0047] The data update unit 60 controls the communication unit 40 to download update audio data from the server 3 before or after the vehicle reaches the second specific section. The download of the update audio data may be performed while the vehicle is in motion or while the vehicle is stopped. If the update audio data is downloaded before reaching the second specific section, the downloaded update audio data is stored (updated) in the storage unit 30 after the vehicle reaches the second specific section (for example, when it stops at the first station of the second specific section).

[0048] Figure 2 is a circuit diagram showing an example of the equivalent circuit of the audio processing unit 50 described above.

[0049] The audio processing unit 50 has a processing block 501 that is configured in common for each channel (CH1 to CHn (in this embodiment, n is 12)). Each processing block 501 has a buffer 51, a modulation circuit 52, a volume setting unit 53, and a multiplier 54.

[0050] The buffer 51 is used to output the audio signal generated by the signal generation unit 20 to the modulation circuit 52 without compromising its strength or quality.

[0051] The modulation circuit 52 is a circuit that modulates the audio signal input from the buffer 51 using a predetermined modulation scheme. The modulation circuit 52 has a determination unit that determines whether the vehicle's current position belongs to a preset first specific section (tunnel, railway bridge, etc.) based on the position information acquired by the acquisition unit 10. When it is determined that the vehicle belongs to the first specific section, the modulation circuit modulates the audio signal using a modulation scheme corresponding to the first specific section. In this embodiment, the modulation circuit 52 performs frequency modulation, phase modulation, etc., and amplitude modulation is performed by the volume setting unit 53. The modulation circuit 52 may also be configured as part of the signal generation unit 20.

[0052] The volume setting unit 53 is for setting the volume of the audio signal generated by the signal generation unit 20, and is configured as part of the modulation circuit 52. Specifically, when the current position of the vehicle is determined to belong to a first specific section, the volume setting unit 53 inputs a volume setting signal to the multiplier 54 for performing amplitude modulation of the audio signal so that the volume of the audio signal corresponds to the volume of the first specific section.

[0053] The multiplier 54 is a circuit that multiplies the signal modulated by the modulation circuit 52 and the signal modulated by the volume setting unit 53. As a result, while traveling through the first specific section, the audio signal is modulated using a modulation method appropriate to the type of the first specific section.

[0054] The audio processing unit 50 further includes an adder 57, a limiter 58, and a digital-to-analog converter (DAC) 59.

[0055] The adder 57 adds the output signals from the multipliers 54 in the processing block 501 of each channel. The limiter 58 limits the combined audio signal added in the adder 57 to a predetermined sound pressure level or lower. The DAC 59 converts the output signal (digital signal) from the limiter 58 into an analog signal and outputs it to the speaker 200.

[0056] The signal generation unit 20 instructs the audio setting unit 53 to set the volume value of the audio signal. When the signal generation unit 20 generates an audio signal based on multiple audio data, if the multiple audio data includes audio data with a higher priority (second audio data), it instructs the volume setting unit 53 of the channel related to the other audio data (first audio data) that has a lower priority than the second audio data to reduce or mute the volume. The volume setting unit 53 inputs the volume setting signal corresponding to the above command to the multiplier 54.

[0057] The multiplier 54, which receives a volume setting signal from the volume setting unit 53 that has received a volume reduction / mute command, inputs an audio signal with a volume corresponding to the command to the adder 57. This makes it possible to generate an audio signal in which the higher-priority audio data (second audio data) is emphasized more than the other audio data (first audio data).

[0058] [Operation] Figures 3 and 4 illustrate the operation of the bell buzzer unit 1 configured as described above, and are flowcharts showing the processing procedures executed in the information processing device 100. Here, we will explain using the vehicle in motion as an example.

[0059] As shown in Figure 3, the information processing device 100 acquires driving information from the sensor group 2 at predetermined intervals while the vehicle is in motion (ST101). The information processing device 100 (signal generation unit 20) determines whether or not it is necessary to generate an alarm based on the acquired driving information (ST102).

[0060] When it is determined that an alarm needs to be issued (Yes in ST102), the signal generation unit 20 reads one or more channels of audio data corresponding to the type of alarm from the storage unit 30 and generates an audio signal (ST103). This allows the driver to be presented with different alarm sounds depending on the type of alarm.

[0061] On the other hand, when there is no need to generate an alarm (No in ST102), the signal generation unit 20 returns to ST101 without generating an audio signal, or, if an audio signal is being generated, stops generating the audio signal and then returns to ST101 (ST104).

[0062] In parallel with the above processing, the information processing device 100 further determines whether the vehicle is traveling in a specific section. As shown in Figure 4, the information processing device 100 acquires location information at predetermined intervals (ST201) and, based on the acquired location information, determines whether the vehicle's current position belongs to a first specific section (ST202). Examples of the first specific section include tunnel sections and railway bridge sections, as mentioned above.

[0063] When it is determined that the vehicle belongs to a first specific section (is traveling in a first specific section) (Yes in ST202), the signal generation unit 20 determines whether or not it is necessary to generate an alarm using the same procedure as in ST102 (ST203). When it is determined that it is necessary to generate an alarm (Yes in ST203), the voice processing unit 50 modulates the voice signal using a modulation method (amplitude modulation, frequency modulation, or phase modulation) corresponding to the first specific section (ST204). This makes it possible to generate an alarm sound that is easily audible to the driver even when traveling in a first specific section where the ambient noise level is high.

[0064] In this case, when multiple types of alarm sounds are generated, if a high-priority audio signal is included in the alarm sound, the volume of audio signals other than the high-priority audio signal is reduced or muted to emphasize the high-priority audio signal. This makes the driver more aware of the alarm.

[0065] On the other hand, if it is determined that the vehicle does not belong to the first specific section (is not traveling in the first specific section) (No in ST202), or if there is no need to generate an alarm (No in ST203), the voice processing unit 50 returns to ST201 without modulating the voice signal, or, if it is generating a voice signal, it stops modulating the voice signal and then returns to ST201 (ST205).

[0066] As described above, according to this embodiment, it is determined whether the vehicle's travel section is a first specific section or another section, and if the vehicle's travel section is a first specific section, the audio signal is modulated using a modulation scheme corresponding to the first specific section. Therefore, it is possible to generate an audio signal that is optimized to be easily recognized by the driver depending on the travel section.

[0067] Figure 5 is a flowchart showing other processing procedures performed in the information processing device 100. Here, we will explain using the vehicle stopping as an example.

[0068] As shown in Figure 5, the information processing device 100 acquires location information of the vehicle's current position when the vehicle is stopped (ST301). Based on the acquired location information, the information processing device 100 determines whether the vehicle's current position belongs to a second specific section (ST302). The second specific section may include the driver's duty section or another company's line section, as mentioned above.

[0069] When it is determined that the vehicle belongs to a second specific section (is stopped in the second specific section) (Yes in ST302), the data update unit 60 downloads update audio data specific to the second specific section from the server 3 and updates the audio data in the storage unit 30 related to the same type of driving information with the update audio data (ST303). As a result, from then on, an audio signal is generated based on the updated audio data, so that the alarm sound applicable to the second specific section can be generated by the speaker 200.

[0070] On the other hand, when it is determined that the vehicle does not belong to the second specific section (has not reached the second specific section) (No in ST302), the data update unit 60 continues to generate an alarm sound based on the audio data in the storage unit 30 without updating the audio data in the storage unit 30.

[0071] As described above, according to this embodiment, when the vehicle's current position belongs to a second specific section, the audio data stored in the memory unit 30 is updated with audio data used in that second specific section (update audio data). Therefore, a warning sound used in that second specific section can be generated using a common speaker 200 without requiring a separate bell buzzer device. This makes it possible to generate a warning sound corresponding to the route section.

[0072] For example, in the case of through service where multiple railway operators operate trains on each other's lines, it is required that trains entering another company's line emit a warning sound specific to that other operator's trains. According to this embodiment, when a train enters another company's line from one company's line, it is possible to emit a warning sound specific to that other operator's trains, thus enabling the generation of a warning sound corresponding to the line section without installing an additional bell buzzer.

[0073] Furthermore, if there are two or more sections of other companies' lines between the train's starting station and its final destination station, each line section will be individually designated as a second specific section. In this case, server 3 will store voice data (update voice data) unique to each line section, and the corresponding voice data in storage unit 30 will be updated with the update voice data unique to that line section at the time of the line section change.

[0074] Although embodiments of the present invention have been described above, it goes without saying that the present invention is not limited to the embodiments described above and can be modified in various ways.

[0075] For example, in the embodiments described above, railway vehicles were used as an example of vehicles, but the present invention is not limited to this and can also be applied to general vehicles such as buses and passenger cars.

[0076] Furthermore, although the above embodiments have described an alarm sound as an example of an audio signal, the present invention is not limited to this and can also be applied to other audio signals other than alarms, such as telephone calls or guidance voices in navigation systems.

[0077] Furthermore, in the above embodiments, we have used as an example the audio data of a warning sound unique to another operator's vehicle as the audio data to be updated in the second specific section, but we are not limited to this. For example, the update audio data may be stored on the server for each driver on duty. In this case, a driver-specific ID (identification formula) may be sent to the server in advance, and the update audio data associated with that ID may be downloaded.

[0078] Alternatively, instead of downloading the update audio data from server 3, the update audio data corresponding to each operational section may be stored in advance within the memory unit 30. In this case, the capacity of the memory unit 30 will be larger, but the installation of the communication unit 40 will be unnecessary.

[0079] In the above embodiment, the information processing device 100 is configured to have a voice processing unit 50, but the voice processing unit 50 may be omitted if necessary. [Explanation of Symbols]

[0080] 1... Bell buzzer unit 2…Sensor group 3…Server 10…Acquisition part 20... Signal generation unit 30...Storage section 40... Communications Department 50…Sound Processing Unit 60...Data update section 100... Information Processing Device 200... Speaker

Claims

1. An acquisition unit that acquires driving information detected by a group of sensors installed on the vehicle and location information relating to the current position of the vehicle, A storage unit that stores multiple audio data corresponding to the type of driving information, A signal generation unit generates an audio signal to be output from an audio generator based on the audio data corresponding to the aforementioned driving information, Based on the location information, a data update unit determines whether the vehicle's current location belongs to a predetermined specific section, and when it is determined that the current location belongs to the specific section, updates at least a portion of the multiple audio data stored in the storage unit with other audio data corresponding to the driving information. An information processing device equipped with the following.

2. An information processing apparatus according to claim 1, The vehicle further comprises a communication unit capable of receiving the other audio data before or after reaching the specified section. Information processing device.

3. An information processing apparatus according to claim 2, The aforementioned specific section is the section on which the driver is on duty. Information processing device.

4. The information processing device according to claim 2, The aforementioned vehicle is a railway vehicle, The aforementioned specific section is a section of another company's railway line. Information processing device.

5. An information processing apparatus according to claim 1, When the signal generation unit generates the audio signal based on the plurality of audio data, it synthesizes each audio data to generate the audio signal. Information processing device.

6. An information processing apparatus according to claim 1, The aforementioned audio signal is an alarm sound that has been pre-set individually according to the type of driving information. Information processing device.

7. An information processing apparatus according to claim 6, The aforementioned vehicle is a railway vehicle, The aforementioned operational information includes at least one of the following: instrument information of the railway vehicle, equipment monitoring information of the railway vehicle, and information related to the ATS (Automatic Train Stop) system. Information processing device.

8. Speakers installed in the driver's cab of the vehicle, An acquisition unit that acquires driving information detected by a group of sensors installed on the vehicle and location information relating to the current position of the vehicle. A storage unit that stores multiple audio data corresponding to the type of driving information, A signal generation unit generates an audio signal to be output from the speaker based on the audio data corresponding to the aforementioned driving information, Based on the location information, a data update unit determines whether the vehicle's current location belongs to a predetermined specific section, and when it is determined that the current location belongs to the specific section, updates at least a portion of the multiple audio data stored in the storage unit with other audio data corresponding to the driving information. A bell buzzer unit equipped with the following features.

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