JP2024034323A - control system - Google Patents

Abstract

An object of the present invention is to provide a control system that can easily recognize an alarm sound even if a plurality of devices sound simultaneously. A control system according to one aspect of the present invention includes a first control device, a second control device, and a controller. The first control device generates a first output signal based on the input signal. The second control device generates a second output signal based on the input signal. The controller synchronizes the first output signal and the second output signal based on the first output signal and the second output signal. [Selection diagram] Figure 1

Description

The present invention relates to a control system that sounds, for example, an electronic alarm sound.

2. Description of the Related Art Among devices for notifying a failure that occurs during the operation of a railway vehicle with an alarm sound, a device in which the alarm sound is computerized is known. Electronic alarms are divided into two types: a bell sound for severe failures and a buzzer sound for minor failures. For example, Patent Document 1 describes an electronic alarm device that can generate both a bell sound and a buzzer sound at the same time. is disclosed.

Japanese Patent Application Publication No. 6-332486

However, when a plurality of devices sound simultaneously, there is a problem in that the sounds interfere with each other and it is difficult to accurately recognize the alarm sound.

In view of the above circumstances, an object of the present invention is to provide a control system that can easily recognize an alarm sound even if a plurality of devices sound simultaneously.

In order to achieve the above object, a control system according to one embodiment of the present invention includes a first control device, a second control device, and a controller.
The first control device generates a first output signal based on the input signal.
The second control device generates a second output signal based on the input signal.
The controller synchronizes the first output signal and the second output signal based on the first output signal and the second output signal.

In the control system, the controller synchronizes the first output signal and the second output signal based on the first output signal and the second output signal. It is possible to suppress a deviation between the output signal and the second output signal. Thereby, even if a plurality of devices sound simultaneously, the alarm sound can be easily recognized.

The controller may synchronize the first output signal and the second output signal based on the output timing of the first output signal and the output timing of the second output signal.

It may further include a first speaker that outputs a first sound based on the first output signal, and a second speaker that outputs a second sound based on the second output signal. .

The device may further include a microphone that acquires the first sound and the second sound.
In that case, the controller synchronizes the first output signal and the second output signal based on the first sound and second sound acquired by the microphone.

As described above, according to the present invention, even if a plurality of devices sound simultaneously, the alarm sound can be easily recognized.

FIG. 1 is a block diagram of a control system according to an embodiment of the present invention. It is a block diagram of a 1st control device and a 2nd control device in the above-mentioned control system. FIG. 3 is a diagram showing sounds emitted from a synchronized first speaker and a second speaker; (A) is a diagram showing the first sound emitted from the first speaker, and (B) is a diagram showing sounds emitted from the second speaker. A diagram showing the second sound emitted, (C) is a diagram showing a third sound in which the sounds emitted from the first speaker and the second speaker are superimposed. FIG. 3 is a diagram showing sounds emitted from a first speaker and a second speaker that are not synchronized; (A) is a diagram showing the first sound emitted from the first speaker; (B) is a diagram showing the sound emitted from the second speaker; A diagram showing the second sound emitted from the speaker, (C) is a diagram showing a third sound in which the sounds emitted from the first speaker and the second speaker are overlapped. It is a diagram showing sounds emitted from a first speaker and a second speaker that are adjusted to be synchronized, and (A) is a diagram showing the first sound emitted from the first speaker, and (B) is A diagram showing the second sound emitted from the second speaker, (C) is a diagram showing a third sound in which the sounds emitted from the first speaker and the second speaker are overlapped. FIG. 3 is a block diagram of a control system according to modification example 1 of the present invention. It is a block diagram of the control system concerning modification 2 of the present invention. FIG. 3 is a block diagram of a control system according to a second embodiment of the present invention. FIG. 3 is a block diagram of a control system according to a third embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings.

<First embodiment>
FIG. 1 is a block diagram of a control system 1 according to an embodiment of the present invention, and FIG. 2 is a block diagram of a first control device 20A and a second control device 20B in the control system 1. The control system 1 in this embodiment includes a device (for example, a display device or a speaker) that is installed in the driver's seat of a railway vehicle and notifies the driver of a call in the event of a failure of railway equipment or activation of the ATS in the event of an emergency. Used as a control system.

The control system 1 includes a first control system 10A and a second control system 10B. The first control system 10A and the second control system 10B have approximately the same configuration and have redundancy. In this embodiment, a first speaker 17A (described later) included in the first control system 10A and a second speaker 17B (described later) included in the second control system 10B are configured to simultaneously sound. In general, by providing redundancy to a system, even if one system fails, the functions (such as speakers) can be supplemented by the other system. However, if the function is a speaker, and when they sound simultaneously, if there is a difference between the sounds emitted from the speakers (output timing, phase, etc.), the sounds cancel each other out due to the difference, resulting in the desired sound. The problem is that it is not possible to make the sounds (warning sounds, etc.) heard by drivers and others. In the following, a configuration will be described in which, in response to the above-mentioned problem, a driver or the like can hear a desired sound even if the sounds are made at the same time.

(First control system)
The first control system 10A includes a first clock oscillator 11A, an external memory 12A, a first input device 13A, a first power supply circuit 14A, a first D/A converter 15A, and a first D/A converter 15A. It has one amplifier 16A, a first speaker 17A, a first storage device 18A, and a first control device 20A.

The first clock oscillation device 11A is a device that outputs a clock signal of a predetermined frequency (for example, 10 kHz) to a first internal clock 25A, which will be described later. The first clock oscillation device 11A uses, for example, a crystal resonator.

In this embodiment, the external memory 12A is a nonvolatile memory in which data related to sound is stored, and is stored in a first storage device 16A, which will be described later. The data related to sound is a record of various types of sounds (different amplitudes, frequencies, output times, etc.) output by the first speaker 17A, which will be described later. In this embodiment, a warning sound such as a bell sound or a buzzer sound is stored as the type of sound. Further, the sampling frequency of data related to the sound is 44.1 kHz.

The first input device 13A outputs a command signal (input signal) for causing a first control device 20A, which will be described later, to output a desired sound. The first input device 13A outputs a command signal based on a signal input from the outside. In this embodiment, a photocoupler is used as the first input device 13A, but of course the invention is not limited to this.

Further, the desired sound is a warning sound such as a bell sound or a buzzer sound as described above, and is a sound whose purpose is to warn the driver of an abnormality. In this embodiment, the bell sound is generated for a severe failure, and the buzzer sound is generated for a minor failure, but the present invention is not limited to this, and may be emitted for the purpose of calling the driver's attention. Here, the signal inputted from the outside is, for example, a signal that informs when there is an abnormality in the railway vehicle, but is of course not limited to this.

The first power supply circuit 14A is configured to convert a voltage input from a first power supply (not shown) into a predetermined voltage and output it to the first control device 20A. Further, a second power supply circuit 14B, which will be described later, is configured to convert a voltage input from a second power supply (different from the first power supply) (not shown) into a predetermined voltage and output it to the second control device 20B. Ru.

The first D/A converter 15A converts the digital signal output from the first controller 20A into an analog signal.

The first amplifier 16A amplifies the analog signal converted by the first D/A converter 15A.

The first speaker 17A outputs a sound (a bell sound, a buzzer sound, etc.) based on the analog signal amplified by the first amplifier 16A.

The first storage device 18A is a flash memory, and stores data regarding the sound stored in the external memory 12A and acquired by the first acquisition unit 21A (described later).

(First control device)
As shown in FIGS. 1 and 2, the first control device 20A includes a CPU (Central Processing Unit) and the like, and includes a first acquisition section 21A, a first generation section 22A, and a first output section 23A. , a first communication section 24A, and a first internal clock 25A.

The first acquisition unit 21A receives sound-related data from the external memory 12A, an input signal (command signal) input from the first input device 13A, and sound-related data stored in the first storage device 18A. get.

The first generation unit 22A generates a first output signal based on the acquired input signal. The first generation unit 22A causes the first acquisition unit 21A to acquire data regarding the sound stored in the first storage device 18A based on the input signal, and generates a first output signal based on the data. . For example, if the input signal is a signal related to a bell sound and a buzzer sound, data on the bell sound and buzzer sound (including frequency, output time, etc.) is stored in the first storage device 18A based on the input signal. and generate a first output signal based on the data.

The first generation unit 22A may set priorities according to the types of sounds to output. The first generation unit 22A may, for example, provide differences in sound volume (sound pressure) according to the priority order. For example, if a bell sound and a buzzer sound are sounded at the same time, the sound may be made easier to hear by, for example, making the volume of the bell sound higher than the volume of the buzzer sound.

The first output section 23A outputs the first output signal to the first D/A converter 15A.

The first communication unit 24A is configured to be able to communicate with a second control device 20B, which will be described later. The first communication unit 24A is, for example, a UART, and can transmit data through serial communication. The first communication unit 24A transmits first information regarding the first output signal to the second control device 20B.

Here, the first information refers to the output timing of the first output signal, the phase (waveform) of the first output signal, the amplitude of the first output signal, the frequency of the first output signal, and the first output signal. This includes the output time, etc. Further, the timing at which the first communication unit 24A transmits the first information can be set as appropriate, but for example, the first communication unit 24A transmits the first information at the timing at which it outputs the first output signal.

The first internal clock 25A measures internal time using the clock signal output from the first clock oscillation device 11A described above. The output timing and output time of the first output signal described above are controlled based on this internal time.

(Second control system)
The second control system 10B includes a second clock oscillator 11B, an external memory 12B, a second input device 13B, a second power supply circuit 14B, a second D/A converter 15B, and a second D/A converter 15B. It has two amplifiers 16B, a second speaker 17B, a second storage device 18B, and a second control device 20B.

The second clock oscillation device 11B is a device that outputs a clock signal (similar to the first clock oscillation device 11A) with a predetermined frequency (for example, 10 kHz) to a second internal clock 25B, which will be described later. The second clock oscillation device 11B uses, for example, a crystal resonator.

In this embodiment, the external memory 12B is a nonvolatile memory in which sound-related data (in this embodiment, the same data as that stored in the external memory 12A) is stored in a second storage device 16B, which will be described later. Further, the sampling frequency of data related to the sound is 44.1 kHz.

The second input device 13B outputs a command signal (input signal) for causing a second control device 20B, which will be described later, to output a desired sound. The second input device 13B outputs a command signal based on a signal input from the outside. In this embodiment, the command signal is the same as the signal output from the first input device 13A. Further, a photocoupler is used for the second input device 13B, but is not limited to this, of course.

Further, the desired sound is a warning sound such as a bell sound or a buzzer sound as described above, and is a sound whose purpose is to warn the driver of an abnormality. In this embodiment, the bell sound is generated for a severe failure, and the buzzer sound is generated for a minor failure, but the present invention is not limited to this, and may be emitted for the purpose of calling the driver's attention. Here, the signal inputted from the outside is, for example, a signal that informs when there is an abnormality in the railway vehicle, but is of course not limited to this.

The second power supply circuit 14B is configured to convert a voltage input from a second power supply (different from the first power supply) (not shown) into a predetermined voltage and output it to the second control device 20B.

The second D/A converter 15B converts the digital signal output from the second control device 20B into an analog signal.

The second amplifier 16B amplifies the analog signal converted by the second D/A converter 15B.

The second speaker 17B outputs a sound (a bell sound, a buzzer sound, etc.) based on the analog signal amplified by the second amplifier 16B.

The second storage device 18B is a flash memory, and stores data related to the sound stored in the external memory 12B and acquired by the second acquisition unit 21B (described later).

(Second control device)
As shown in FIG. 2, the second control device 20B includes a CPU (Central Processing Unit) and the like, and includes a second acquisition section 21B, a second generation section 22B, a second output section 23B, and a second output section 23B. 2 internal clocks 24B and a controller 25.

The second acquisition unit 21B acquires sound-related data from the external memory 12B, an input signal input from the second input device 13B, and sound-related data stored in the second storage device 18B.

The second generation unit 22B generates a second output signal based on the acquired input signal. The second generation unit 22B causes the second acquisition unit 21B to acquire data related to the sound stored in the second storage device 18B based on the input signal, and generates a second output signal based on the data. .

For example, if the input signal is a signal related to a bell sound and a buzzer sound, data on the bell sound and buzzer sound (including frequency, output time, etc.) is stored in the second storage device 18B based on the input signal. and generate a second output signal based on those data. Although the second output signal has the same waveform as the first output signal in this embodiment, it is of course not limited to this, and may have a different waveform.

The second output section 23B outputs the second output signal to the second D/A converter 15B.

The second internal clock 24B measures internal time using the clock signal output from the second clock oscillation device 11B described above. The output timing and output time of the second output signal mentioned above are controlled based on this internal time.

(controller)
The controller 25 includes a third acquisition section 251 , a comparison section 252 , a determination section 253 , an adjustment section 254 , and a third output section 255 .

The third acquisition unit 251 acquires first information regarding the first output signal transmitted by the first communication unit 24A and second information regarding the second output signal generated by the second generation unit 22B. and get. In this embodiment, the timing at which the third acquisition unit 251 acquires the first information is when the first information is transmitted by the first communication unit 24A, and the timing at which the third acquisition unit 251 acquires the first information is when the first information is transmitted by the first communication unit 24A. The timing to acquire the information is when the second generation unit 22B generates the second information, but of course it is not limited to this.

The comparison unit 252 compares the first information and the second information based on the acquired first information and second information. In the present embodiment, the comparison unit 252 compares the first output timing T1 of the first output signal (see FIGS. 3(A), 4(A), and 5(A)) and the second output timing T1 of the second output signal. (See FIG. 3(B), FIG. 4(B), and FIG. 5(B)). In this embodiment, when comparing, time is used as a reference. The first output timing T1 is based on the internal time determined by the first internal clock 25A, and the second output timing T2 is based on the internal time determined by the second internal clock 24B. Of course, the comparison target is not limited to this, and may also be the phase (waveform), output time, etc.

The determining unit 253 determines the degree of deviation (difference, error) between the first output signal and the second output signal based on the result of comparing the first information and the second information by the comparing unit 252. . Here, the deviation (difference, error) is, for example, the difference between the first output timing and the second output timing. The degree of deviation is determined based on the first output signal, and if the deviation is more than a predetermined value (for example, if the time when the second output signal is output is delayed by 1 ms or more than the time when the first output signal is output), It is determined that there is a shift.

The adjustment section 254 synchronizes the second output signal with the first output signal based on the determination result of the determination section 253. The adjustment unit 254 generates an adjustment command signal for adjusting the deviation when the determination unit 253 determines that there is a deviation.

The adjustment command signal means that, for example, when the second output timing T2 is delayed by 1 millisecond from the first output timing T1 (determined to be a shift), the adjustment command signal is used to adjust the second speaker 17B in accordance with the phase of the first output signal. This is a signal that advances the second output timing T2 by 1 millisecond in order to output at a predetermined timing. signal that adjusts the emitted sounds so that they do not cancel each other out).

The third output section 255 outputs the generated adjustment command signal to the second generation section 22B. The second generation unit 22B generates a second output signal (synchronized with the first output signal) adjusted based on the adjustment command signal, and outputs the second output signal to the second speaker 17B by the second output unit 23B. Output. At this time, when the adjustment command signal is input, the second generation unit 22B can stop generating the second output signal in the shifted state.

This suppresses the continuous generation of the third sound S3' (see FIG. 4(C)) in which the sounds emitted from the first speaker 17A and the second speaker B cancel each other out. Can be done.

As described above, the controller 25 synchronizes the first output signal and the second output signal based on the first output signal and the second output signal, and synchronizes the first output signal and the second output signal. It is possible to suppress the deviation (phase deviation) between the signals.

Thereby, even if a plurality of devices (the first speaker 17A and the second speaker 17B) sound simultaneously, the desired alarm sound can be recognized (that is, the first speaker 17A and the second speaker 17B It is possible to prevent the sounds from drowning out each other due to the phase shift between the sounds emitted by the two.

[Control system operation]
FIG. 3 is a diagram showing sounds emitted from the synchronized first speaker 17A and second speaker 17B, (A) is a diagram showing the first sound S1 emitted from the first speaker 17A, and (B) ) is a diagram showing the second sound S2 emitted from the second speaker 17B, and (C) is a diagram showing the third sound S3 in which the sounds emitted from the first speaker 17A and the second speaker 17B are overlapped. FIG.

As shown in FIGS. 3A to 3C, when the first output timing T1 and the second output timing T2 are synchronized, the driver hears the superimposed third sound S3. The third sound S3 has a waveform in which the amplitude of the first sound S1 and the amplitude of the second sound S2 are superimposed.

However, as shown in FIGS. 4(A) to 4(C), if there is a time difference Z1 between the first output timing T1 and the second output timing T2', the first sound S1 and the second sound The third sound S2' cancels out and is heard by the driver as a third sound S3'. In this case, there was a problem in that the driver could not hear the warning sound that he wanted to hear.

Therefore, in this embodiment, when the determination unit 253 determines that there is a shift, the second output signal is shifted by the time Z2 from the first output timing T1, and the phase of the first output signal and the second output signal is changed. The output is performed at the matched timing (second output timing T2''). Thereby, it is possible to generate a sound (third sound S3'') having a desired amplitude from a shifted timing.

Furthermore, if one speaker (for example, the second speaker 17B) fails, the driver can recognize that the failure has occurred because the sound pressure decreases. Of course, the present invention is not limited to this, and a display device such as a lamp may be used to notify the failure.

In this embodiment, it is not necessary to check the audio data of the first output signal and the second output signal on the premise that the audio data is the same and the input signal is also the same. However, the present invention is not limited to this, and a step of checking whether or not the audio data is correct may be provided.

<Modification 1>
Next, Modification 1 of the present invention will be explained. FIG. 6 is a block diagram of a control system 1' according to modification 1. Configurations different from those in the first embodiment will be mainly described, and configurations similar to those in the first embodiment will be given the same reference numerals and explanations thereof will be omitted or simplified.

This modification differs from the first embodiment in that the first control system 10A' and the second control system 10B' include a display device 19.

The display device 19 is a device common to the first control system 10A' and the second control system 10B', and displays, for example, the status of the railway vehicle. The display device 19 is, for example, a lamp, which is blue (or green) when normal, flashes yellow to indicate caution, and red when abnormal.

When an input signal for emitting red light is input from the first input device 13A to the first control device 20A', the first control device 20A' causes the display device 19 to display the red color based on the input signal. Outputs an output signal to cause the light to emit light. The same applies to the second control system 10B'.

This makes it possible to notify the driver of abnormalities and alert the driver not only audibly but also visually. Further, when blinking the lamp, information regarding the output signal outputted by the first communication unit 24 to the display device 19 may be transmitted to the second control device 20B' as in the first embodiment. This allows the timing of the flashing to be matched, making it easier for drivers to recognize the lights. Of course, the configuration for synchronizing the light emission timing of the lamps is not limited to blinking, but may also be when the lamps are lit.

<Modification 2>
Next, a second modification of the present invention will be described. FIG. 7 is a block diagram of a control system 1'' according to a second modification. Configurations different from those in the first embodiment will be mainly described, and configurations similar to those in the first embodiment will be given the same reference numerals and explanations thereof will be omitted or simplified.

In this modification, the first control system 10A'' has a first communication device 31A, and the second control system 10B'' has a second communication device 31B. Different from the embodiment.

The first communication device 31A enables communication between an external device and the first control device 20A'' by wire or wirelessly. Here, the external device is, for example, a monitoring device that monitors the first control device 20A'', and transmits first information regarding the first output signal to the first control device 20A'' via the first communication device 31A. ''Send.

Thereby, an abnormality in the operation of the first control device 20A'' can be detected. Further, based on the detected abnormality, a signal for correcting the abnormality can be transmitted via the first communication device 31A.

In addition to the above, the external device may be, for example, railway equipment, and when an abnormality occurs in the railway equipment, the railway equipment sends a signal to the first communication device 31A to make the first speaker 17A sound. May be sent via. The first communication device 31A is not limited to the use described above, and may be used as a communication device for debugging, for example. The configuration of the second communication device 31B is the same as that of the first communication device 31A, so a description thereof will be omitted.

<Second embodiment>
Next, a second embodiment of the present invention will be described. FIG. 8 is a block diagram of a control system 1A according to the second embodiment. Hereinafter, configurations that are different from those in the first embodiment will be mainly described, and configurations similar to those in the first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted or simplified.

In this embodiment, the first control device 20A' has a first control section 27A, and the second control device 20B' has a second communication section 26B and a second control section 27B. This differs from the first embodiment in this point.

The second communication unit 26 is configured to be able to communicate with the first control device 20A'. The second communication unit 24B is, for example, a UART, and can transmit data through serial communication. The second communication unit 26 transmits second information regarding the second output signal to the first control device 20A'. Here, the second information may include information as to whether adjustment has been made by the adjustment unit 264 in addition to the above-mentioned information.

The first control unit 27A counts the number of times it is determined that there is a shift based on the second information, and when the number of times is detected consecutively, for example, 10 times, the second control device 20B' determines that there is an abnormality. , the first control device 20A' may be controlled to generate the sound alone.

For example, a method for causing the first control unit 27A to generate a sound independently is such that the first control unit 27A sends a signal to the first communication unit 24A to control the second control device 20B' not to generate the second output signal. For example, it can be sent via. When performing alone, the volume of the first speaker 17A may or may not be increased. The case where it is determined that there is an abnormality is not limited to the above example, but also includes a case where the second information is not transmitted from the second control device 20B' for a certain period of time.

Further, if the first information is not transmitted from the first control device 20A' for a certain period of time, the second control unit 27B determines that the first control device 20A' is abnormal, and the second control device 27B determines that the first control device 20A' is abnormal. is controlled to generate sound independently. A method similar to the above-mentioned method can be used to generate sound independently. Furthermore, when performing it alone as described above, the volume of the second speaker 17B may or may not be increased.

In this way, by mutually monitoring the status of each other's devices, it is possible to respond appropriately when an abnormality occurs.

Furthermore, since the first control device 20A' and the second control device 20B' are configured to be able to communicate with each other, the first internal The time of the clock 25A and the time of the second internal clock 24B may be synchronized. Thereby, the deviation between the first output signal and the second output signal can be suppressed.

When synchronizing the times of the internal clocks described above, the processing time from inputting an input signal from the first input device 13A to outputting the first output signal is transmitted to the second control device 20B'. Good too. Thereby, the output timing of the second output signal can be controlled based on the processing time, so that the deviation between the first output signal and the second output signal can be further suppressed.

As described above, the same effects as in the first embodiment can be obtained in this embodiment as well.

<Third embodiment>
Next, a third embodiment of the present invention will be described. FIG. 9 is a block diagram of a control system 1B according to the third embodiment.

This embodiment differs from the first embodiment in that the second control system 10B''' includes a microphone 32.

The microphone 32 is a sound collection device that acquires the first sound and the second sound. The microphone 32 only needs to be provided at a position where it can pick up the first sound and the second sound, such as an intermediate position between the first speaker 17A and the second speaker 17B.

The controller 25 synchronizes the first output signal and the second output signal based on the first sound and the second sound acquired by the microphone 32. First, the third acquisition unit 251 of the controller 25 acquires third information regarding a third sound obtained by collecting the first sound and the second sound from the microphone 32. The third information here is an audio signal obtained by synthesizing the first sound and the second sound. Preferably, the audio signal is a digital signal.

In this case, the analog signal picked up from the microphone 32 may be converted into a digital signal using an A/D converter (not shown) and then acquired. The acquisition unit 251 further acquires the first information transmitted by the first communication unit 24A and the second information generated by the second generation unit 22B.

Next, the comparison unit 252 compares the deviation between the first output signal and the second output signal with a threshold value for determining that there is a deviation, based on the third information.

The determining unit 253 determines the degree of deviation (difference, error) between the first output signal and the second output signal based on the result of the comparison between the third information and the threshold value by the comparing unit 252.

The adjustment unit 254 synchronizes the second output signal acquired by the third acquisition unit 251 with the first output signal acquired by the third acquisition unit 251 based on the determination result of the determination unit 253. The adjustment unit 254 generates an adjustment command signal for adjusting the deviation when the determination unit 253 determines that there is a deviation.

The adjustment command signal means that, for example, when the second output timing T2 is delayed by 1 millisecond from the first output timing T1 (determined to be a shift), the adjustment command signal is used to adjust the second speaker 17B in accordance with the phase of the first output signal. This is a signal that advances the second output timing T2 by 1 millisecond in order to output at a predetermined timing. signal that adjusts the emitted sounds so that they do not cancel each other out).

The third output section 255 outputs the generated adjustment command signal to the second generation section 22B. The second generation unit 22B generates a second output signal (synchronized with the first output signal) adjusted based on the adjustment command signal, and outputs the second output signal to the second speaker 17B by the second output unit 23B. Output. At this time, when the adjustment command signal is input, the second generation unit 22B can stop generating the second output signal in the shifted state.

Thereby, it is possible to suppress the continuous generation of the third sound in which the sounds emitted from the first speaker 17A and the second speaker B cancel each other out.

As described above, the controller 25 synchronizes the first output signal and the second output signal based on the first sound and the second sound acquired by the microphone 32, and synchronizes the first output signal and the second output signal. It is possible to suppress a signal deviation (phase deviation) from the output signal.

Thereby, even if a plurality of devices (the first speaker 17A and the second speaker 17B) sound simultaneously, the desired alarm sound can be recognized (that is, the first speaker 17A and the second speaker 17B It is possible to prevent the sounds from drowning out each other due to the phase shift between the sounds emitted by the two.

As described above, the same effects as in the first embodiment can be obtained in this embodiment as well.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can of course be modified in various ways, and the configurations of each embodiment and modification may be combined. good.

For example, in the above embodiment, the same sound is generated from a plurality of speakers, but each speaker may generate a different sound. Although the controller 25 is provided in the second control device 20B, the controller 25 is not limited to this, and may be provided in the first control device 20A, or may be provided in the first control device 20A and the second control device 20B. may be provided independently and separately.

In the above embodiment, the sound emitted from the speaker is based only on the output signals output by the first control device 20A and the second control device 20B, but the sound is not limited to this, and the sound emitted from the speaker is emitted by the driver using a microphone or the like. The voice may also be emitted from the speaker.

Further, in the above embodiments, the explanation has been given using a railway vehicle as an example, but the present invention is not limited to this application and can be applied to other vehicles, facilities, etc.

1... Control system 10A... First control system 10B... Second control system 13A... First input device 13B... Second input device 17A... First speaker 17B... Second speaker 20A... First control Apparatus 20B...Second control device 21A...First acquisition section 21B...Second acquisition section 22A...First generation section 22B...Second generation section 23A...First output section 23B...Second output section 24A...First communication section 24B...Second internal clock 25A...First internal clock 25...Controller 251...Third acquisition section 252...Comparison section 253...Judgment section 254...Adjustment section 255...Third output section

Claims (4)

a first controller that generates a first output signal based on the input signal;
a second control device that generates a second output signal based on the input signal;
A control system comprising: a controller that synchronizes the first output signal and the second output signal based on the first output signal and the second output signal. The control system according to claim 1,
The controller synchronizes the first output signal and the second output signal based on the output timing of the first output signal and the output timing of the second output signal. The control system. The control system according to claim 1,
A control system further comprising: a first speaker that outputs a first sound based on the first output signal; and a second speaker that outputs a second sound based on the second output signal. 4. The control system according to claim 3,
further comprising a microphone that acquires the first sound and the second sound,
The controller synchronizes the first output signal and the second output signal based on the first sound and the second sound acquired by the microphone. The control system.

Images