JP2009290789A - System and method for emergency reporting - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system and a method for emergency reporting wherein a conversation between an operator at an emergency call center and an occupant in a vehicle is easily established. <P>SOLUTION: If an emergency occurs in a vehicle 11 or an occupant therein, the emergency reporting system 100 connects the emergency call center 200 and a line of contact using a handsfree system. The system includes a warning sound disabling means 31 that at an emergency conversation between the occupant and the emergency call center 200, disables or suppresses sounding of a warning sound from an in-vehicle device 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an emergency call system and an emergency call method for connecting a telephone line to an emergency call center when an emergency situation occurs in a vehicle or an occupant, and in particular, an emergency call system and an emergency call for controlling an in-vehicle device during an emergency call Regarding the method.

  An emergency call system that automatically calls an emergency call center has been put into practical use even when an emergency occurs in a vehicle without the driver operating a telephone mounted on the vehicle (see, for example, Patent Document 1). In the emergency call system, a driver's voice is collected by a microphone in the vehicle by hands-free calling. However, it can be assumed that it is difficult for a vehicle occupant who has caused an emergency to make a loud voice. Therefore, Patent Document 1 describes an emergency call system that increases the gain of a microphone when an emergency situation occurs, and further amplifies the voice uttered by the occupant.

If the passenger's voice is amplified, the operator of the emergency call center can also hear the voice of the passenger, so that the operator can listen to the voice volume (the voice of the operator's voice) so that the passenger can hear the voice at the request of the passenger. ) Can be adjusted.
JP 2004-80697 A

  By the way, the vehicle is equipped with various alarm systems for preventing the key from being locked in the passenger compartment, forgetting to wear the seat belt, etc. At the same time, an alarm sound is also collected. In particular, when an emergency situation occurs in a vehicle, an alarm sound may be generated due to opening of a door or damage to parts. Therefore, as in an emergency call system described in Patent Document 1, an alarm is generated when the gain of a microphone is increased. The sound will be amplified together. For this reason, there is a problem that it is difficult for the operator to talk with the occupant and find out the situation of the vehicle and the occupant.

  In addition, when an emergency occurs, the occupant may get out of the vehicle. However, if the occupant gets out of the vehicle, even if the gain of the microphone is increased, the voice uttered by the occupant cannot be collected. Further, when the occupant gets off, there is a problem that the operator's reception voice output from the speaker does not reach the occupant outside the vehicle, and the conversation between the operator and the occupant cannot be established.

  In view of the above problems, an object of the present invention is to provide an emergency call system and an emergency call method that facilitate the establishment of a conversation between an operator of an emergency call center and a vehicle occupant.

  In view of the above problems, the present invention provides an emergency call system for connecting a call line to an emergency call center using a hands-free system when an emergency situation occurs in a vehicle or an occupant. And an alarm sound prohibiting means for prohibiting or reducing the alarm sound of the vehicle-mounted device.

  According to the present invention, by prohibiting or reducing the alarm sound, the operator can easily hear the voice uttered by the occupant.

  Further, the present invention provides an emergency call system for connecting a call line to an emergency call center when an emergency situation occurs in a vehicle or an occupant. Means.

  According to the present invention, the operator's voice output from the vehicle speaker can easily reach the occupant by fully opening the vehicle window.

  It is possible to provide an emergency call system and an emergency call method that make it easy to establish a conversation between an operator of an emergency call center and a vehicle occupant.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is an example of a diagram for schematically explaining the operation of the emergency call system 100 of the present embodiment. The emergency call system 100 detects that an emergency situation has occurred in the vehicle 11 or the occupant when an impact (hereinafter referred to as acceleration) of a predetermined value or more occurs in the vehicle 11 due to a frontal collision or a side collision, or by an operation of the occupant. . And the emergency call system 100 of this embodiment performs the following control, when an emergency situation arises.
1. All or alarm sounds that can be blown by the vehicle 11 are prohibited or suppressed.
2. Fully open the window.

  Although the emergency call system 100 calls the emergency call center 200 upon detection of an emergency situation, since the alarm sound is prohibited, the operator of the emergency call center 200 can easily hear the voice uttered by the occupant. . Even when the occupant gets off and leaves the vehicle 11, the operator's voice output from the speaker 25 of the vehicle 11 can easily reach the occupant by fully opening the window of the vehicle 11.

  Hereinafter, both controls will be described in detail by way of examples. Only one of the prohibition of alarm sound and the full opening of the window may be executed, or one emergency call system 100 may execute both.

  In this embodiment, an emergency call system 100 that prohibits alarm sound during an emergency call will be described.

  FIG. 2 shows an example of a schematic configuration diagram of the emergency call system 100. The emergency call system 100 is controlled by the communication control unit 23, and when an emergency occurs, the communication control unit 23 communicates with the emergency call center 200 and the communication line via the base station 13 and the communication network 14 of the mobile phone network or the public telephone line network. Are connected, so that the passenger and the operator of the emergency call center 200 can talk. The operator of the emergency call center 200 has a conversation with the passenger of the vehicle 11, grasps the situation of the vehicle 11 and the passenger, and if necessary, informs the fire department, the police, or the JAF (hereinafter referred to as fire department) the situation of the vehicle 11. Contact and request an express. In addition to the illustration, it is preferable that a GPS (Global Positioning System) device is provided so that position information of the vehicle 11 can be detected.

  The communication control unit 23 is connected to an airbag ECU (Electronic Control Unit) 21 and an alarm output ECU 22 via an in-vehicle LAN such as a CAN (Controller Area Network). Furthermore, the communication control unit 23 includes an audio processing unit 24. It is connected.

[Emergency detection]
The airbag ECU 21 is a computer having a CPU, a ROM, a RAM, a memory, and an input / output interface, and serves as one of means for detecting that an emergency has occurred in the vehicle 11. The airbag ECU 21 is connected to a G sensor arranged on the bumper for detecting a front collision with the obstacle 12 and a G sensor arranged to detect a side collision arranged on a B biller or the like. When the sensor detects an acceleration equal to or higher than the threshold value, the airbag ECU 21 deploys the airbag corresponding to the part where the G sensor is disposed. When the airbag is deployed, it can be estimated that an emergency has occurred in the vehicle 11 and the occupant. Therefore, when the communication control unit 23 of the present embodiment receives the deployment signal indicating that the airbag has been deployed, the emergency call center 200 Connect the telephone line to.

  Further, the airbag ECU 21 does not necessarily have to control the deployment of the airbag (that is, it does not need to have an inflator, a folded airbag body, etc.), and can control the pressure of the G sensor and the obstacle 12 and the deformation of the vehicle body. It is only necessary to have a sensor to detect and to detect that the vehicle has collided with the obstacle 12 in accordance with an acceleration or the like exceeding a threshold value.

  In addition to the deployment signal from the airbag ECU 21, for example, if there is a system that detects that collision is inevitable based on the relative distance and relative speed with the obstacle 12, such as a pre-crash safety system, such a situation can occur. Based on the detection, it may be detected that an emergency has occurred in the vehicle 11.

  Note that the emergency call system 100 can communicate with the emergency call center 200 by the operation of the passenger so that the passenger of the vehicle 11 can connect the call line to the emergency call center 200 at his / her will regardless of the collision with the obstacle 12 or the like. A call start switch 27 is provided. When the call start switch 27 is turned on, it can be estimated that an emergency due to, for example, illness has occurred in the occupant. Therefore, even if it is detected that an emergency has occurred in the vehicle 11 based on the on operation of the call switch 27 Good.

  Therefore, an emergency situation means that a deployment signal has been received, a collision inevitable has been detected, or whether the call start switch 27 has been detected, regardless of whether or not it is actually necessary to protect the passenger. It means that it has been turned on (hereinafter sometimes simply referred to as “when an emergency occurs”).

  By the way, in the figure, the airbag ECU 21 transmits the deployment signal to the communication control unit 23. However, since the deployment signal can be transmitted broadcastly in CAN communication, even if the deployment signal is transmitted directly to the alarm output ECU 22. Good. In this case, there is no need to request the alarm output ECU 22 to prohibit the alarm sound from blowing once the communication control unit 23 receives the development signal. On the other hand, as will be described later, when the communication control unit 23 transmits a prohibition request to the alarm output ECU 22, it is possible to control not only the prohibition of the alarm sound but also the restart of the alarm sound.

[Communication with Emergency Call Center 200]
The communication control unit 23 is a computer that includes a CPU, ROM, RAM, memory, CAN communication unit, input / output interface, and the like, and the CPU executes a program stored in the memory or is realized by hardware such as an ASIC. A prohibition request unit 31 and a restart request unit 32.

  In addition, an audio processing unit 24 is connected to the communication control unit 23. The voice processing unit 24 is configured as a computer including a CPU, ROM, RAM, memory, and an input / output interface. The input / output interface includes a speaker 25 that outputs an operator's voice and a microphone that converts an occupant's voice into an electrical signal. 26 is connected. The speaker 25 can be an audio device mounted on a vehicle or the speaker 25 of a navigation system. For example, the speaker 25 is arranged with the passenger compartment side facing the driver's seat door. Further, the microphone 26 has a sound collection area at the driver's mouth, and is configured to collect only the sound uttered by the driver while excluding other passengers' voice and road noise and other outside noise. The Note that it is preferable to expand the sound collection area when an emergency occurs.

  The voice processing unit 24 A / D converts the transmission voice collected by the microphone 26 to generate a transmission signal, and D / A converts the reception signal acquired from the communication control unit 23 to generate a reception voice. After being amplified by the amplifier, it is output from the speaker 25. Thereby, a hands-free system is realized. It should be noted that the voice processing unit 24 cancels the received voice from the transmitted voice collected by the microphone 26 in order to prevent the received voice output from the speaker 25 from flowing into the microphone 26 and being mixed into the transmitted signal. Is applied to the transmitted voice. Therefore, the voice processing unit 24 performs A / D conversion after amplifying the transmitted voice whose echo has been canceled by the amplifier.

  The communication control unit 23 is, for example, a vehicle-mounted data communication unit with a voice call function, a passenger's mobile phone, a PHS (Personal Handyphone System), or the like (hereinafter referred to as a mobile terminal). The communication control unit 23 stores the telephone number of the emergency call center 200 in advance, and connects the telephone line to the emergency call center 200 when an emergency occurs. When the operator of the emergency call center 200 goes off-hook, the passenger can talk with the operator. Therefore, the emergency call is from when the operator goes off-hook until the conversation ends and either the occupant or the operator goes on-hook.

  When the communication control unit 23 is a mobile phone or the like, the communication control unit 23 and the audio processing unit 24 are detachably connected by wire or wireless. In the case of wired connection, for example, a USB cable is used, and in the case of wireless connection, for example, Bluetooth (registered trademark) is used.

  The communication control unit 23 communicates with the emergency call center 200 through the data link layer (PPP (Point-to-Point-Protocol)), transport layer (TCP), network layer (IP), and the like to perform data communication. If an emergency situation occurs, the location information of the vehicle 11 acquired by GPS is transmitted to the emergency call center 200.

[Beeping alarm sound]
The alarm output ECU 22 is a computer having a CPU, a ROM, a RAM, a memory, and an input / output interface. However, the alarm output ECU 22 is not a single unit, but all ECUs that emit an alarm sound, such as a body ECU, a meter ECU, an engine ECU, and a verification ECU. , Brake ECU, etc. Since it is not necessary to discriminate which ECU sounds what kind of alarm sound, the communication control unit 23 requests all the alarm output ECUs 22 that can sound the alarm sound to prohibit the alarm sound.

  The alarm sound that is blown by the vehicle 11 includes, for example, a key reminder warning for preventing key binding, a warning forgetting to turn off the light, a reverse warning for notifying that the shift position is in R (reverse), and a seat belt being worn. Seat belt non-wearing warning to inform the driver, lane keeping assist warning to inform the departure tendency during lane maintenance control, doze detection warning to detect and report the driver's sleep, radar cruise warning to notify the radar cruise abnormality Etc.

  For example, when music such as a CD or video such as a DVD is reproduced, or when a television or radio is received and output together with sound, it is difficult to hear the sound produced by the occupant as well as the alarm sound. Therefore, it is preferable to prohibit all output of the media as well as the alarm sound or suppress the volume. The alarm output ECU 22 in this case is, for example, a navigation ECU that controls the audiovisual system.

  In addition, not only artificial sounds such as alarm sounds and media output, but also sounds generated by air conditioners may make it difficult to hear the sound produced by the passengers. For this reason, it is preferable to stop the air conditioner or suppress the air volume in an emergency. In this case, the alarm output ECU 22 is an air conditioner ECU.

[Prohibition or suppression of alarm sound]
When the prohibition request unit 31 of the communication control unit 23 receives a deployment signal from the airbag ECU 21, the prohibition request unit 31 transmits a prohibition request to the alarm output ECU 22. The alarm output ECU 22 that has received the prohibition request prohibits or suppresses the alarm sound. Whether to suppress or prohibit is set in advance in the communication control unit 24. For example, even if it is set to suppress, the operator of the emergency call center 200 transmits a command to set to prohibit It is preferable that With this control, the operator can prohibit the sounding of the warning sound only when it is difficult to hear the passenger's voice due to the warning sound.

  Note that the alarm sound only needs to have a volume that can be heard by the occupant. Therefore, when the alarm sound is suppressed, the alarm sound is suppressed to a minimum volume (for example, 1/5 to 1/10 when the alarm is not suppressed).

  As described above, the airbag ECU 21 may transmit the prohibition request directly to the alarm output ECU 22. However, since the airbag ECU 21 does not detect that the emergency has been resolved, the airbag output ECU 22 cannot request the alarm output ECU 22 to resume blowing the alarm sound or the like. In this case, it is difficult to restart the alarm sound after a minor collision, an incorrect deployment of the airbag, or the occupant operating the call start switch 27 to prohibit the alarm sound. Become.

  Therefore, in the case of a minor collision or the like, it is preferable that the resumption request unit 32 of the communication control unit 23 transmits a resumption request for requesting resumption of alarm sounding to the alarm output ECU 22. For example, if the restart request unit 32 confirms that the alarm sound can be resumed by an occupant's operation (for example, turning off the call start switch 27), the restart request unit 32 sends a restart request to the alarm output ECU 22. Send.

[Operation procedure of emergency call system 100]
FIG. 3 is an example of a flowchart illustrating a procedure in which the emergency call system 100 prohibits the alarm sound. The flowchart in FIG. 3 is repeatedly executed, for example, every predetermined cycle time.

  First, the prohibition request unit 31 determines whether an emergency has occurred (S10). The occurrence of an emergency is detected, for example, when an airbag deployment signal is received or the call start switch 27 is turned on. If no emergency has occurred (No in S10), the communication control unit 23 ends the process of FIG.

  When an emergency occurs (Yes in S10), the communication control unit 23 connects a telephone line to the emergency call center 200 stored in advance (S20). At step S20, the emergency call center 200 is called.

  Further, the prohibition request unit 31 transmits a prohibition request to the alarm output ECU 22 (S30). As described above, since there are many cases where there are a plurality of alarm output ECUs 22, they are broadcasted by CAN communication.

  By the way, it is only after the conversation with the operator of the emergency call center 200 that the sound of the alarm sound disturbs the conversation. Therefore, the prohibition request may be transmitted by then. Accordingly, the prohibition request to the alarm output ECU 22 is that, at the latest, the emergency call center 200 detects the incoming call (the ringing tone sounds), and the communication control unit 23 issues the incoming call response (the operator answers the telephone (off-hooks)). It may be transmitted until it is detected.

  Moreover, the timing which transmits a prohibition request | requirement to alarm output ECU22 may be before connecting the emergency call center 200 and telephone line of step S20. This is because, in the event of an emergency, it is rarely necessary to sound an alarm sound, and therefore it is possible to prohibit the alarm sound from being emitted early without alerting the alarm sound. Further, the timing for transmitting the prohibition request may be the same as the time when the telephone line is connected to the emergency call center 200 (step S20 and step S30 are performed at the same time) or the time when the incoming call response is detected. Good. By such timing control, it is always possible to prohibit the sounding of an alarm sound during an emergency call.

  During an emergency call (while the driver is talking to the operator), the restart request unit 32 determines whether or not a call end operation is detected (S40). When a call end operation is detected (Yes in S40), that is, when the occupant can perform a call end operation, an alarm sound may be sounded, so the restart request unit 32 transmits a restart request to the alarm output ECU 22 ( S50). The operator does not go off-hook until the passenger goes off-hook. Therefore, when it is not during an emergency call, it is possible to alert the occupant with various warning sounds.

  When the call end operation is not detected (No in S50), that is, while the operator confirms the situation of the occupant or the vehicle 11, the state where the telephone line is connected is continued, so that the warning sound is prohibited. Can be left.

  As described above, the emergency call system 100 according to the present embodiment prohibits the sound of an alarm sound during an emergency call, so that the operator can easily hear the voice uttered by the occupant, and grasps the situation of the vehicle 11 and the occupant. It can be made easier.

  In this embodiment, an emergency call system 100 that opens a window during an emergency call described with reference to FIG. 1 will be described.

  FIG. 4 shows an example of a schematic configuration diagram of the emergency call system 100. 4 that are the same as those in FIG. 2 are assigned the same reference numerals, and descriptions thereof are omitted. The emergency call system 100 of FIG. 4 is different in that it includes a power window ECU 41 and an occupant detection device 43 that drive a window actuator (hereinafter referred to as a window ACT) 42.

  The power window ECU 41 is built in each door integrally with the window ACT42, and opens and closes the door window according to the operation of the occupant. For example, the power window ECU 41 drives the window ACT 42 to the open side while the occupant continues to operate to the open side, and drives the window ACT 42 to the close side while the occupant continues to operate to the close side. The power window ECU 41 stores the top dead center and the bottom dead center, and stops driving the window ACT 42 when reaching the top dead center or the bottom dead center while detecting the position of the window with the Hall IC. Therefore, the window automatically stops at the fully open position or the fully closed position. When the power window ECU 41 of this embodiment receives the opening request, the power window ECU 41 fully opens the window even if there is no occupant operation.

  A known configuration can be used for the occupant detection device 43. The occupant detection device 43 is, for example, a load sensor embedded in a seat, an infrared sensor that detects the body temperature of the occupant in each seat, a camera that captures a face image, and the like. From these detection results, the occupant is present in the vehicle. Detect that.

Window Opening When the communication control unit 23 detects an emergency, the opening request unit 33 transmits an opening request to the power window ECU 41. Thereby, the power window ECU 41 of each door fully opens the window.

  FIG. 5 is a diagram schematically showing an occupant who gets off the vehicle 11 after an emergency occurs. When an emergency occurs in the vehicle 11, the window can be opened, and the sound output from the speaker 25 can easily reach the occupant even when the occupant is outside the vehicle. For example, even if the operator utters “What if an accident?”, An occupant outside the vehicle can hear it and return to the vehicle 11 to be able to talk with the operator. The window includes a window provided other than the door, such as a sunroof.

  In addition, when the window is opened, it is preferable that the equalizer 34 variably controls the frequency characteristic of the voice signal of the received voice so that the operator's voice output from the speaker 25 reaches farther. It is known that high sounds (4 kHz or higher) are difficult to hear, and that older people are more difficult to hear. On the other hand, it is known that low sounds can reach far away. Therefore, the equalizer 34 emphasizes (amplifies) a frequency band of 1 kHz or less of the audio signal, for example, and then outputs from the speaker 25.

・ Prohibition of window opening By the way, even if an emergency occurs, passengers do not always go out of the car. That is, if the passenger opens the window while in the vehicle, noise outside the vehicle is collected by the microphone 26, which makes it difficult to talk with the operator. Therefore, in this embodiment, when the occupant detection device 43 detects that an occupant is present in the vehicle, the opening of the window is prohibited. As a result, the window can be opened only when the occupant goes out of the vehicle, the operator's inquiry can be easily reached for the occupant outside the vehicle, and when there is an occupant in the vehicle, noise outside the vehicle can be spoken. Can be prevented.

  Further, if the occupant detection device 43 detects that no occupant is present in the vehicle, the operator's voice can be increased, such as maximizing the output of the speaker 25. When the output of the speaker 25 is increased even if there are passengers in the vehicle, the volume may be inappropriate for the passengers. However, if it can be confirmed that the speaker 25 is not in the vehicle, increasing the output of the speaker 25 This is because the sound volume is appropriate.

-Sounding of the alarm sound It is preferable to control the sounding of the alarm sound according to whether or not the occupant is outside the vehicle, similarly to the window. For example, when an occupant is present in the vehicle, it is preferable to prohibit alarm sounding as in the first embodiment. On the other hand, when there is no occupant in the vehicle, the possibility that the operator and the occupant will have a conversation until the occupant returns to the vehicle 11 is low.

  When the alarm sound is controlled in this way, the operator of the emergency call center 200 knows that the passenger is present in the vehicle if the warning sound is not sounded and that the passenger is not present in the vehicle if the warning sound is sounded. It will be possible. During an emergency call, it may be difficult for an operator to grasp whether it is difficult for an occupant to talk or whether it is not in the vehicle, but the emergency call system 100 of the present embodiment can easily grasp this. It becomes possible. When the occupant returns to the vehicle, the conversation becomes difficult if the alarm sound is sounded. Therefore, when the occupant detection device 43 detects the occupant, the alarm output ECU 22 stops sounding the alarm sound.

From the above, the emergency call system 100 of the present embodiment controls the opening and closing of the window and the sounding of the alarm sound as follows.
1. Only when there are no passengers in the car, all door windows are fully opened.
2. Warning sounds are prohibited only when there are passengers in the car.

[Operation procedure of emergency call system 100]
FIG. 6 is an example of a flowchart illustrating a procedure in which the emergency call system 100 according to the present embodiment prohibits alarm sounding. In FIG. 6, the same steps as those in FIG. 3 will be described briefly.

  First, the prohibition request unit 31 determines whether an emergency has occurred (S10). The occurrence of an emergency is detected, for example, when an airbag deployment signal is received or the call start switch 27 is turned on. If no emergency has occurred (No in S10), the communication control unit 23 ends the process of FIG.

  When an emergency occurs (Yes in S10), the communication control unit 23 connects a telephone line to the emergency call center 200 stored in advance (S20). At step S20, the emergency call center 200 is called.

  Next, the communication control unit 23 determines whether or not the occupant detection device 43 detects an occupant in the vehicle (S25). Since the occupant does not always move out of the vehicle immediately after the occurrence of an emergency situation, it is preferable to perform the determination in step S25 periodically.

  Since the operation procedure when a passenger is present in the vehicle (Yes in S25) is the same as that in the first embodiment, the description thereof is omitted.

  When there is no passenger in the vehicle (No in S25), the opening request unit 33 transmits an opening request to the power window ECU 41 (S60). Thereby, the window of the door of the vehicle 11 can be fully opened, and the operator's voice can be easily reached to the passenger outside the vehicle.

  In addition to the effects of the first embodiment, the emergency call system 100 according to the present embodiment can make it easier for operators to reach the passengers outside the vehicle, and the operator does not sound an alarm and the passengers speak. When there is no voice, it can be easily understood that the passenger is in a situation where it is difficult to speak.

It is an example of the figure which illustrates operation | movement of an emergency call system typically. It is an example of the schematic block diagram of an emergency call system (Example 1). (Example 1) which is an example of the flowchart figure which shows the procedure which an emergency call system prohibits an alarm sound blowing. It is an example of the schematic block diagram of an emergency call system (Example 2). It is an example of the figure which shows typically the passenger | crew who got off the vehicle after the emergency situation occurred. (Example 2) which is an example of the flowchart figure which shows the procedure in which an emergency call system prohibits blowing of an alarm sound.

Explanation of symbols

21 Airbag ECU
22 Alarm output ECU
23 communication control unit 24 voice processing unit 31 prohibition request unit 32 restart request unit 33 release request unit 34 equalizer

Claims (6)

In an emergency call system that connects a call line to an emergency call center using a hands-free system when an emergency situation occurs in a vehicle or a passenger,
Alarm sound prohibition means for prohibiting or reducing the alarm sound of the in-vehicle device during an emergency call between the passenger and the emergency call center,
An emergency call system characterized by comprising: Occupant detection means for detecting occupants in the vehicle,
Only when the occupant detection means detects an occupant in the vehicle, the warning sound prohibiting means prohibits the sounding of the warning sound,
The emergency call system according to claim 1. When an emergency occurs while the audio system is outputting sound, the warning sound prohibiting means prohibits output of sound by the audio system or suppresses volume.
The emergency call system according to claim 1 or 2, characterized in that. In an emergency call system that connects a call line to an emergency call center using a hands-free system when an emergency situation occurs in a vehicle or a passenger,
A window opening means for opening a vehicle window during an emergency call between an occupant and an emergency call center;
An emergency call system characterized by comprising: Occupant detection means for detecting occupants in the vehicle,
When the occupant detection means detects an occupant in the vehicle, the window opening means does not open the window,
The emergency call system according to claim 4. In an emergency call method for connecting a telephone line to an emergency call center using a hands-free system when an emergency situation occurs in a vehicle or a passenger,
The warning sound prohibition means prohibits or reduces the alarm sound of the in-vehicle device during an emergency call between the passenger and the emergency call center.
An emergency call method characterized by that.

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