JP3330589B2 - Emergency call system terminal equipment and emergency call system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency call system, and more particularly, to an emergency call system terminal device mounted on a vehicle and transmitting data such as vehicle position information to an emergency call center in an emergency, and an emergency call system terminal device. It relates to an emergency call system.

[0002]

2. Description of the Related Art Conventionally, it is mounted on a vehicle such as an automobile,
2. Description of the Related Art There is known an emergency call system terminal device provided with an emergency call communication means for performing a telephone call process via a base station of a communication carrier at a center that controls the emergency call system such as a police station or an emergency call center.

The conventional emergency call system terminal device has an external microphone as a means for inputting a user's voice to be transmitted to the emergency call center during a hands-free voice call, and acquires a voice signal input from the microphone. The emergency call was made by sending it to the Emergency Call Center.

In such an emergency call system terminal device, Japanese Patent Laid-Open Publication No. H11-250378 discloses that a wireless device in an emergency call system terminal device is used as a normal mobile phone in a non-emergency case and an attached external microphone is used. An example of realizing a hands-free call using the same is disclosed.

[0005]

In the above-mentioned conventional emergency call system terminal device, the voice signal from the microphone is directly input to the radio of the emergency call system terminal device.
The microphone sound could not be used unless it was either a report from an emergency reporting system terminal device or a mobile phone call.

Therefore, when a vehicle equipped with an emergency call system terminal device is equipped with a navigation system having a function of searching for a route by a voice recognition function or a car telephone having a hands-free voice call function, the emergency call system terminal is used. In addition to the microphone used for the device, it was necessary to provide a voice recognition microphone for navigation and a voice microphone for car phones.

The present invention solves the above-mentioned conventional problems and provides a vehicle equipped with a device such as a navigation device or a car telephone by providing the emergency notification system terminal device with a function of outputting a voice signal from a microphone. At
The microphone can be utilized, a voice recognition function by a navigation device without using a plurality of microphones,
The purpose is to realize a hands-free call function using a car phone.

[0008] Further, by providing a configuration in which a voice signal from a microphone is input to an emergency notification system terminal device and a voice signal is output to the outside, when a device connected to a downstream device such as a navigation device or a car phone breaks down. It is another object of the present invention to reliably input a signal from a microphone and realize an emergency voice call.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention is mounted on a vehicle, and is automatically provided to an emergency call center having jurisdiction over an emergency call system in an emergency. In an emergency notification system terminal device that performs an emergency call, a microphone for inputting voice, a voice signal input from the microphone, a transmission voice signal path for transmitting to the emergency notification center, An audio signal path for outputting to the outside;
Filter provided in the audio signal path for output to the
A buffer circuit having a buffering function and an amplification function;
Buffer power supply to supply or cut off power to buffer circuit
Blocking means, and when the emergency call communication process is performed, the buffer
An emergency call system terminal device, wherein a power cutoff means cuts off power to the buffer circuit .

[0010] With this configuration, when a device such as a navigation device or a car phone is mounted, voice recognition is performed using a voice signal output from the terminal device of the emergency call system without installing a new microphone. Function, car phone function , and emergency call
During the communication process, only the devices required for the emergency call
Power supply to reduce power consumption,
The external device that supplies the signal from the
In the case of a failure such as
Obstacles can be prevented.

[0011] The invention described in claim 2 of the present invention provides:
2. The emergency notification system terminal device according to claim 1, wherein the audio signal input from the microphone is divided into two signal paths, differentially input, and signals are transmitted through the two signal paths. 3.

With this configuration, the voice signal from the microphone can be input as a differential signal inside the emergency notification system terminal device, so that the noise component applied to the voice signal can be removed.

Further, the invention according to claim 3 of the present invention provides:
The emergency signal system terminal device according to claim 2, wherein the two signal paths are output to outside through two signal lines. With such a configuration, an external device connected to the emergency notification system terminal device can receive the audio signal from the microphone as a differential signal, so that a noise component applied to the audio signal can be removed.

Further, the invention according to claim 4 of the present invention provides:
The emergency notification system terminal device according to claim 1, wherein the voice signal input from the microphone is directly output to the outside of the emergency notification system terminal device without passing through a buffer circuit.

With this configuration, when a device such as a navigation device or a car telephone is mounted, a voice recognition function can be performed by using a voice signal from a signal path for outputting a voice signal input from a microphone to the outside. , A car phone function can be realized.

[0016] The invention described in claim 5 of the present invention provides:
The emergency notification system terminal device according to claim 1 , wherein a capacitor is provided in series between the audio signal input from the microphone and a signal path to be output to the outside.

[0017] With this configuration, the externally connected device can output the audio signal A that is input from the microphone.
By acquiring only the C component, hands-free voice communication can be realized. Further, when the externally connected device is short-circuited, the circuit in the terminal device of the emergency call system can be protected.

The invention according to claim 6 of the present invention provides:
The voice signal input from the microphone is input to a hands-free voice communication device provided inside the emergency notification system terminal device via a capacitor.
1. The emergency notification system terminal device according to item 1 .

With this configuration, only the AC component, which is a voice signal, is obtained for a signal from a microphone output to the outside without depending on a bias from an external device connected to the terminal device of the emergency call system. Thus, hands-free voice communication can be realized.

Further, the invention according to claim 7 of the present invention provides:
The signal output from the buffer circuit is transmitted to the emergency notification system.
System with a signal path to output to the outside of the system terminal equipment
An emergency notification system terminal device according to claim 1.

With this configuration, it is possible to perform a filtering process or an amplifying process in the buffer circuit and generate and output a low impedance signal. This signal has a high drive capability and the signal is hardly deteriorated even when an external device is connected. Therefore, devices such as a navigation device and a car phone can input the speech signal and realize the speech recognition function and the car phone function in an optimal state.

The invention according to claim 8 of the present invention provides
The audio signal acquired by the microphone is transferred to the buffer circuit.
Means for inputting to the hands-free voice communication device via
The emergency notification system terminal device according to claim 1 , further comprising: a unit that outputs a voice signal from the microphone to the outside of the emergency notification system terminal device.

With such a configuration, it is possible to generate and output a low impedance signal while performing the filtering process or the amplification process in the buffer circuit. This signal has a high drive capability and the signal is hardly deteriorated even when an external device is connected. As a result, the audio signal according to the purpose can be used inside or outside the emergency notification system terminal device.

Further, the invention according to claim 9 of the present invention provides
Through the signal path to be input to the hands-free voice communication device, a separate buffer circuit in the signal path to be output to the outside of the emergency call system terminal device including an audio signal acquired from the microphone inside the emergency call system terminal equipment 2. The method according to claim 1, wherein the audio signal is transmitted by using
It is an emergency call system terminal equipment.

With this configuration, a signal from the microphone used in the terminal device of the emergency notification system can be used by an external device such as a navigation device or a car phone, and the external device can be used in the event of a failure such as disconnection or short circuit. The emergency notification system terminal device can acquire a voice signal from the microphone unit via another buffer circuit, and realize a hands-free voice call.

Further, the invention according to claim 10 of the present invention, by entering the audio signal acquired from the microphone, is provided in the interior of the emergency call system terminal equipment via the bus <br/> Ffa circuit a signal path for input to the hands-free voice communication device, and inputs a sound signal from the microphone, the back
The emergency notification system terminal device according to claim 1 , further comprising a signal path for outputting to the outside of the emergency notification system terminal device via a buffer circuit different from the remote control circuit.

With this configuration, the signal from the microphone used in the terminal device of the emergency call system can be used by an external device such as a navigation device or a car phone, and the external device can be used in the event of failure such as disconnection or short circuit. The emergency notification system terminal device can acquire a voice signal from the microphone and realize a hands-free voice call. Furthermore, by configuring separate buffer circuits, by setting independent audio levels and audio bands, it is possible to perform adjustments according to the internal hands-free circuit and externally connected devices.

[0028]

[0029]

[0030] The invention described in Claim 11 of the present invention, when the power supply from the battery of the vehicle is interrupted and switched to the power supply from the auxiliary battery, the buffer
The emergency call system terminal device according to claim 1 , wherein a power cutoff unit cuts off a power supply of the buffer circuit.

With this configuration, when power is supplied from the auxiliary battery, power is supplied only to the devices necessary for the emergency notification communication process, thereby reducing power consumption and reducing the power consumption of the auxiliary battery. Can be suppressed.

According to a twelfth aspect of the present invention, the control unit included in the emergency notification system terminal device recognizes the state of execution of the emergency notification communication process, and controls the control signal from the control unit. The buffer power cutoff means
2. The emergency notification system terminal device according to claim 1 , wherein the power supply of said buffer circuit is shut off.

[0033] With this configuration, the power supply control is performed by the control unit that controls the emergency call notification process, thereby reducing power consumption and externally supplying a signal from the buffer circuit. In the event of a failure such as disconnection or short-circuit of a device, a failure due to heat generation of the buffer circuit can be prevented.

According to a thirteenth aspect of the present invention, the control signal for executing power supply from an auxiliary battery is utilized, and the buffer is used by using the control signal.
The power cutoff means cuts off the power supply of the buffer circuit, so as to be an emergency call system terminal device according to claim 1 .

With this configuration, the power supply of the buffer circuit is cut off by using the control signal for power supply from the auxiliary battery, and the power is supplied only to the devices necessary for the emergency notification communication process. Thus, power consumption can be reduced, and power consumption of the auxiliary battery can be suppressed.

According to a fourteenth aspect of the present invention, the emergency call system terminal device according to any one of the first to thirteenth aspects and the emergency call system are controlled by the emergency call system. An emergency call system that includes an emergency call center that receives an emergency call transmission signal from a terminal device.

With such a configuration, an emergency call system having the above effects can be obtained.

[0038] The invention of claim 1 5 of the present invention displays a vehicle position on the map screen, along with notifying the vehicle position to the user, the setting of inducing to the destination by recognizing speech 請 performing a navigation device having an internal circuit, an emergency call by voice emergency call center in an emergency to perform
In Motomeko 1 to the in-vehicle system having a device that requires speech input of the emergency call system terminal equipment according to claim 13, wherein the navigation device, audio
The audio signal input from the microphone
An on-vehicle system that transmits the signal to a road and outputs an audio signal from the microphone to an external device such as the emergency notification system terminal device via the navigation device.

With such a configuration, signals from a microphone used in a navigation device can be used by an external device such as an emergency notification system terminal device, and can be commonly used without having a microphone. Therefore, the number of parts of the microphone can be reduced.

[0040] The invention described in Claim 16 of the present invention, the navigation device includes a voice signal input path from the microphone, is interposed capacitor between the audio signal output path to said external device 16. The in-vehicle system according to claim 15 , wherein a DC component of the audio signal is cut off.

With this configuration, the externally connected device can acquire only the AC component, which is the audio signal input from the microphone, and realize a hands-free emergency call. Further, when an externally connected device is short-circuited, a circuit in the navigation device can be protected.

Further, the invention according to claim 17 of the present invention, the navigation device, is interposed a buffer circuit to an audio signal input path from the microphone, the internal circuit and the external equipment which performs speech recognition an in-vehicle system according to claim 15, characterized in that the output to.

With such a configuration, it is possible to generate and output a low impedance signal while performing the filtering process or the amplification process in the buffer circuit. This signal has a high drive capability and the signal is hardly deteriorated even when an external device is connected. Therefore, equipment such as navigation equipment, emergency communication system terminal equipment,
By inputting the voice signal, a voice recognition function and an emergency call function can be realized in an optimal state.

The invention according to claim 18 of the present invention is the navigation device, wherein the navigation device has a buffer circuit interposed between an audio signal input path from the microphone and the internal circuit for performing voice recognition. inputs the audio signal to the internal circuit from the audio signal from the microphone is a vehicle system according to claim 15, characterized in that directly output to the external device via the capacitor.

With this configuration, the buffering circuit performs the filtering process or the amplifying process, and generates and outputs a low impedance signal. Therefore, the navigation device can realize the voice recognition function in an optimal state. Yes, the emergency call system terminal equipment,
It is possible to obtain only an AC component, which is a voice signal input from a microphone, and realize a hands-free emergency call.

According to a nineteenth aspect of the present invention, in the navigation device, the microphone is connected to the microphone via a buffer circuit between an audio signal input path from the microphone and the internal circuit for performing voice recognition. 16. The in-vehicle system according to claim 15 , wherein the audio signal is input to the internal circuit, and the audio signal from the microphone is output to the external device via another buffer circuit.

With such a configuration, it is possible to generate and output a low impedance signal while performing the filtering process or the amplification process in the buffer circuit. This signal has a high drive capability and the signal is hardly deteriorated even when an external device is connected. Therefore, equipment such as navigation equipment, emergency communication system terminal equipment,
By inputting the voice signal, the voice recognition function and the emergency call function can be realized in an optimal state, and even when an error such as a short circuit occurs in one of the voice paths, the signal path by another buffer is used. Sound that does not cause an abnormality can be transmitted normally.

[0048]

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

(First Embodiment) FIG. 1 is an overall block diagram showing a basic configuration of the configuration of an emergency call system terminal device 1 according to the present invention. In FIG. 1, an emergency call system terminal device 1 is mounted on a vehicle such as an automobile, and has a center (hereinafter, referred to as a center) that controls an emergency call system such as a police or an emergency call center in an emergency such as a traffic accident or sudden illness. ), Data such as the current vehicle position information and the registered vehicle is transmitted, and an emergency vehicle dispatch request and a situation communication by voice call are performed. The vehicle position detecting means includes a GPS antenna 4 and a GPS receiver 16. The vehicle also has a gyro sensor 13 as means for detecting the traveling direction and direction of the vehicle. The communication antenna 2 is provided to perform transmission and reception with a communication carrier base station.

The emergency call transmission button 3 is a button that is pressed by a user in an emergency such as a traffic accident or sudden illness to generate a control signal for starting an emergency call transmission process. When the emergency call transmission button 3 is pressed, the control unit 12 recognizes that an emergency call notification request has been made, and under the control of the control unit 12, the emergency call notification unit 11 transmits the emergency call via the communication antenna 2. It performs automatic telephone call to the destination, current position information data transmission, voice communication processing related to emergency call, and the like.

The microphone 5 is a microphone that acquires a user's voice and converts it into a transmission voice signal for transmission to the center. The speaker 6 is a speaker that acquires a voice signal received from the emergency call center and sounds a voice for transmission to the user. The hands-free control device 17 implements a hands-free voice call during the emergency call contact process,
This is a signal processing device that performs signal processing on a voice signal transmitted from a user and a voice signal received from a center during a voice call. The means for outputting the audio signal to the outside, that is, the microphone signal output device 18 is a signal output device that outputs the audio signal input from the microphone 5 to the hands-free control device 17 and the external connection device 7 as an audio signal. . The external connection device 7 is a device that is connected to the emergency communication system terminal device 1 and uses a voice signal output from the emergency notification system terminal device 1 for voice recognition, a telephone call, and the like. For example, navigation equipment, car phones, CDs,
It includes devices such as in-vehicle AV devices such as MD and DVD.

An example of the operation flow of the emergency call system terminal device 1 according to the first embodiment of the present invention configured as described above will be described. In FIG. 1, the position information acquisition processing unit 14 includes data from the gyro sensor 13 and a GPS receiver.
16 by the data received from the GPS antenna 4
Generate location information data. The control unit 12 periodically acquires data such as position information from the position information acquisition processing unit 14,
Processing for recording in the storage unit 15 is performed.

The user presses the emergency call button 3 in an emergency such as a traffic accident or sudden illness. When the emergency call button 3 is pressed, a signal indicating that the button is pressed is output to the control unit 12. Thereby, the control unit 12 recognizes that the emergency call transmission request has been made, and starts the emergency call process. Control unit 12
Acquires the data such as the positional information accumulated from the storage unit 15 and the telephone number of the center, and makes a call request to the emergency call communication means 11 using the telephone number.
Emergency call notification means 11 uses telephone antenna 2 to initiate a telephone call process to the other party corresponding to the telephone number via the base station of the communication carrier.

When receiving an outgoing call response from a call partner or a signal such as a busy signal that shifts to a busy state, the emergency call notification means 11 recognizes that the state has shifted to a talking state, and performs voice call control or data communication. With the transition to control,
A signal notifying that the call has been transferred is output to the control unit 12. The control unit 12 determines that the call is successful, and performs processing of transmitting data such as position information to the center, which is the call partner corresponding to the telephone number, via the base station or the like of the communication carrier.

When the center which controls the emergency call system such as the emergency call center receives all the position information data from the emergency call system terminal device 1, it performs a process of switching to a voice call. When receiving the signal indicating the shift to the voice call, the emergency call notification unit 11 built in the emergency call system terminal device 1 outputs the signal indicating the shift to the voice call to the control unit 12. The control unit 12
When receiving a signal indicating that voice communication has been started, control is performed to connect the voice path of the emergency call notification means 11 and the hands-free control device 17, and the processing shifts to voice communication processing.

At the time of voice call contact processing, the emergency call contact means 11
Outputs a voice signal received from the center to the hands-free control device 17. The hands-free control device 17 performs echo cancellation processing, howling prevention control, and the like on the received audio signal, further amplifies the signal level, and outputs the amplified signal level to the speaker 6. The speaker 6 performs a process of sounding a received voice signal input from the hands-free control device 17 and transmits the signal to a user.

The microphone 5 acquires an audio signal from the user and outputs the audio signal to the microphone signal output device 18. The microphone signal output device 18 performs amplification processing and the like on the audio signal, and outputs the result to the hands-free control device 17 as a transmission audio signal. The hands-free control unit 17 performs an echo canceling process, a howling prevention control, and the like on the transmission audio signal, and outputs the result to the emergency notification communication unit 11. The emergency call notification unit 11 performs a process of receiving the transmission voice signal from the hands-free control device 17 and transmitting the signal to the center.

The microphone signal output device 18 is connected to the microphone 5
A process of outputting the voice input from the outside to the outside is performed.

Externally connected device 7 such as a navigation device
In the case of the configuration in which the terminal is connected to the user, the user is provided with a voice guidance and a destination for performing voice guidance to the microphone 5 for performing voice operation of other in-vehicle devices, etc. Say a voice phrase. Mike 5
After converting the voice phrase into a voice signal, the voice signal is output to the microphone signal output device 18. The microphone signal output device 18 outputs the audio signal to the externally connected device 7. The external connection device 7
The voice signal is input, and the voice phrase is subjected to voice guidance processing according to voice recognition means (not shown) in the externally connected device.

As described above, according to the first embodiment of the present invention, when an external connection device such as a navigation device or a car telephone is mounted, the emergency notification system terminal device 1 can be installed without a new microphone. By using a voice signal from a microphone to be output, a voice recognition function and a car phone function can be realized.

[0061] Second Embodiment (Second Embodiment) The present invention receives voice from a microphone, and outputs to the internal circuitry of the emergency call system terminal equipment 1, emergency call system terminal equipment 1 And a microphone signal output device having means for directly outputting to the outside of the microphone. FIG. 2 is a block diagram of a portion showing an internal configuration of a microphone signal output device which is a means for outputting an audio signal to the outside in the entire block diagram shown in FIG. All the following embodiments will be described with reference to the same partial block diagrams.

In FIG. 2 showing the second embodiment of the present invention, the microphone 5 is the same as the microphone 5 shown in FIG. The microphone signal output device 18 is a microphone signal output device similar to the microphone signal output device 18 shown in FIG. The hands-free control device 17 is a hands-free control device similar to the hands-free control device 17 shown in FIG.

In the microphone signal output device 18, the first buffer circuit 181 is a buffer circuit that performs processing such as amplification and filtering of the signal from the microphone 5 and outputs the signal to the hands-free control device 17. First resistor 18
2, the second resistor 183, the third resistor 184, and the fourth resistor 185 are resistors constituting the microphone signal output device 18, and adjust the audio signal level by adjusting the resistance value and the resistance value ratio of the resistors. Do. The first capacitor 186 and the second capacitor 187 are
The capacitor constituting the microphone signal output device 18 is inserted to transmit only an AC signal which is a component of the audio signal of the audio signal. The microphone 5 generates a voice signal from the voice of the user and outputs the voice signal to the microphone signal output device 18.
The microphone signal output device 18 outputs to the hands-free control device 17 via the first buffer circuit 181 and
Also outputs the audio signal from outside. 1st external connection resistance
196, the second external connection resistor 197 is the first external connection capacitor
198, together with the second external connection capacitor 199, are provided on a signal line to be output to the externally connected device, and play a role in protecting the notification path of the emergency notification system terminal device 1 when the externally connected device is short-circuited.

Further, the signal from the microphone 5 is referred to as an audio signal,
By separating the signals into two signals and differentially inputting the same, noise in the same phase from the microphone 5 or noise applied to a harness (wiring) connecting the microphone 5 and the microphone signal output device 18 is removed. By inputting the information to the inside of the notification system terminal device 1 and separating the two signals for output to the outside, the differential signal can also be input to the external connection device 7.

As described above, sound is input from the microphone,
And outputs to the internal circuitry of the emergency call system terminal apparatus 1, by providing the functions of a means for outputting to the outside of the emergency call system terminal apparatus 1, the navigation device, when equipped with devices such as automobile telephones, to the outside By using the voice signal converted by the microphone as the voice signal to be output, a voice recognition function and a car phone function can be realized.

Further, by inputting an audio signal to the hands-free control device via a capacitor, the audio signal can be input without depending on a bias from an externally connected device connected to the outside.
Only the AC component, which is the audio signal of the signal from the microphone, is acquired, and hands-free voice communication can be realized.

Further, by separating the signal from the microphone 5 into two signals that are differentially input and differentially inputting, the in-phase noise output from the microphone or the noise applied to the harness is removed, and the sound quality is improved. Can be kept. As a result, a voice signal with little noise can be input to the external connection device, so that voice operation with few voice recognition errors and a car phone call with good call quality can be performed.

(Third Embodiment) In a third embodiment of the present invention, a voice is input from a microphone, output to an internal circuit of the emergency notification system terminal device 1 having a buffer circuit, and the buffer A microphone signal output device having a function of outputting an output signal from the circuit to the outside of the emergency notification system terminal device 1 is provided.

In the following embodiments, the description of the same components as those in FIG. 2 will be omitted.

FIG. 3 showing the third embodiment of the present invention is different from FIG. 2 in that the output of the audio signal to the outside is changed from the direct output of the audio signal converted by the microphone 5 to the first output. The point is that the output is made via the buffer circuit 181.

As a result, a signal input from the microphone 5 is input to the first buffer circuit 181 and a signal subjected to amplification processing, filtering processing, and the like in the first buffer circuit 181 is used as an external audio signal output. be able to.

As described above, by outputting the audio signal to the outside through the buffer circuit, the filtering process and the amplification process can be performed by the buffer circuit.
A low impedance signal can be generated and output. This signal has a high drive capability and the signal is hardly deteriorated even when an external device is connected. Thus, a device such as a navigation device or a car phone can input the voice signal and implement a voice recognition function and a car phone function by using a voice signal that is easily processed in an external device. .

(Fourth Embodiment) In a fourth embodiment of the present invention, two audio circuits each having a buffer circuit are provided, an audio signal is input from a microphone, and the signal is transmitted through one buffer circuit. And a microphone signal output device having a function of outputting the voice signal from the microphone to the outside of the emergency notification system terminal device 1 through another buffer circuit while outputting the signal to the internal circuit of the emergency notification system terminal device 1 Things.

[0074] In Figure 4 showing a fourth embodiment of the present invention, FIG. 3, wherein the difference is a hands-free controller 17
A buffer circuit is provided for each of the output of the audio signal and the output of the audio signal to the outside, and the output signal to the outside is output through another second buffer circuit 188.

In the microphone signal output device 18, the second buffer circuit 188 performs processing such as amplification and filtering of the audio signal from the microphone 5 and performs processing for outputting the signal to the outside of the emergency notification system terminal device 1. It is. The fifth resistor 189, the sixth resistor 190, the seventh resistor 191, and the eighth resistor 192 are resistors constituting the microphone signal output device 18 for generating an external audio signal, and adjust the resistance value of the resistor. The point that the audio signal level is adjusted by doing so is the same as that shown in the second embodiment. Third
The capacitor 193 and the fourth capacitor 194 are capacitors constituting the microphone signal output device 18 for generating an external audio signal, and transmit only an AC signal which is a component of the audio signal of the audio signal. This is also the same as in the second embodiment. The microphone 5 generates a voice signal from the voice of the user and outputs the voice signal to the microphone signal output device 18. The microphone signal output device 18 outputs to the hands-free control device 17 via the first buffer circuit 181 and the second buffer circuit 18
The audio signal is also output to the outside via the terminal 8.

As described above, the function of outputting to the internal circuit of the emergency notification system terminal device 1 via one buffer circuit and outputting to the outside of the emergency notification system terminal device 1 via another buffer circuit. With this, the signal from the microphone 5 used in the emergency notification system terminal device 1 can be used by an external device such as a navigation device or a car phone, and the emergency notification system terminal can be used even if the external device is broken or short-circuited. Equipment 1
Can acquire a voice signal from a microphone and realize a hands-free voice call. Furthermore, by configuring a separate buffer circuit, by setting independent audio levels (amplitude, phase, etc.) and audio bands,
Adjustments can be made independently according to the internal hands-free circuit and externally connected equipment.

(Fifth Embodiment) In a fifth embodiment of the present invention, the power supply control of a buffer circuit that outputs a voice signal converted by a microphone to the outside of the emergency notification system terminal device 1 is controlled. And a microphone signal output device that can be controlled by the unit.

FIG. 5 showing the fifth embodiment of the present invention is different from that shown in FIG. 4 in that the control of the power supply of the second buffer circuit 188 can be performed by the control unit 12 shown in FIG. It is.

In the microphone signal output device 18, the transistor 195 is a transistor for controlling the cutoff of the power supply of the second buffer circuit 188.

The control unit 12 controls the transistor 195 when the emergency notification communication process is performed or when it is desired to continue the operation while suppressing power consumption such as when the power supply from the vehicle is interrupted and the vehicle is driven by an auxiliary battery. On the other hand, control to shut off the power is performed. The transistor 195 shuts off the power supply under the control of the control unit 12 and suppresses power consumption.

The control signals from the control unit 12 include:
Utilizing a control signal for executing power supply from an auxiliary battery (not shown), the control signal is used to supply power to a buffer circuit having an audio signal path to be output to the outside of the emergency notification system terminal device 1. It can also be turned off.

As described above, by controlling the power supply of the buffer circuits other than the buffer circuit existing in the high priority audio signal path in the emergency only in the emergency,
At the time of emergency call notification processing or the like, power can be reduced by supplying power only to devices required for emergency call notification processing. Further, by having another buffer circuit and signal path for external output, when the external connection device supplying the audio signal from the buffer circuit breaks down such as disconnection or short circuit, the failure due to the heat generation of the buffer circuit is prevented. can do.

In each of the embodiments described above, the number of buffer circuits inserted into each signal path is not limited to this, and may be multi-stage. Whether the audio signal is differentially input and extracted or not extracted can be appropriately selected depending on the S / N ratio required for the device. The two signals are also separated from the output of the hands-free control device. It goes without saying that the output may be made.

In each of the embodiments described above, the emergency notification system terminal device is provided with a function of outputting a voice signal from a microphone. A microphone can be utilized, and a voice recognition function using a navigation device and a hands-free call function using a car phone can be realized without using a plurality of microphones. By providing a function of outputting a voice signal from a microphone to a navigation device having a microphone, the microphone can be used even in a vehicle equipped with an external device such as an emergency notification system terminal device. Specifically, in FIGS. 1 to 5, the microphone signal output device 18 is provided in the navigation device, the external connection device 7 is replaced with an emergency notification system terminal device, and the hands-free control device 17 is replaced with the voice recognition function of the navigation device. It can be easily realized by replacing with a unit (not shown).

[0085]

As is apparent from the above description, according to the present invention, a navigation device and a car telephone are provided by having a function of outputting a voice signal converted by a microphone input to the emergency notification system terminal device 1. In a vehicle equipped with such a device, a voice recognition function by navigation and a hands-free call function by a car phone can be realized without using a plurality of microphones. Furthermore, even when a device connected downstream, such as a navigation device or a car phone, breaks down, a signal from a microphone can be reliably input, and an emergency voice call can be realized.

[Brief description of the drawings]

FIG. 1 is an overall block diagram showing a configuration of an emergency call system terminal device according to a first embodiment of the present invention.

FIG. 2 is a partial block diagram illustrating a configuration of a microphone signal output device of an emergency call system terminal device according to a second embodiment of the present invention.

FIG. 3 is a partial block diagram showing a configuration of an emergency notification system terminal device and a microphone signal output device according to a third embodiment of the present invention.

FIG. 4 is a partial block diagram illustrating configurations of an emergency call system terminal device and a microphone signal output device according to a fourth embodiment of the present invention.

FIG. 5 is a partial block diagram showing a configuration of an emergency call system terminal device and a microphone signal output device according to a fifth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Emergency call system terminal equipment 2 Communication antenna 3 Emergency call transmission button 4 GPS antenna 5 Microphone 6 Speaker 7 External connection device 11 Emergency call communication means 12 Control unit 13 Gyro sensor 14 Location information acquisition processing unit 15 Storage unit 16 GPS receiver 17 Hands-free control device 18 Microphone signal output device 181 First buffer circuit 182 First resistor 183 Second resistor 184 Third resistor 185 Fourth resistor 186 First capacitor 187 Second capacitor 188 Second buffer circuit 189 Fifth resistor 190 Sixth Resistance 191 Seventh resistance 192 Eighth resistance 193 Third capacitor 194 Fourth capacitor 195 Transistor 196 First external connection resistance 197 Second external connection resistance 198 First external connection capacitor 199 Second external connection capacitor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 11/00-11/10 B60R 11/02 G08B 23/00-31/00 G01C 21/00-25 / 00

Claims (19)

(57) [Claims] 1. An emergency call system terminal device mounted on a vehicle and automatically making an emergency call to an emergency call center having jurisdiction over an emergency call system in an emergency. A voice signal path for transmitting the transmitted voice signal to the emergency notification center, a voice signal path for outputting to the outside of the emergency notification system terminal device, and a voice signal for outputting to the outside.
The filtering and amplification functions provided in the signal path.
And a power supply to the buffer circuit.
And a buffer power-off means for supplying or shutting off
At the time of notification communication processing, the buffer power cutoff means
An emergency call system terminal device for shutting off a power supply to a buffer circuit . 2. An audio signal input from the microphone is 2
The emergency notification system terminal device according to claim 1, wherein the emergency notification system terminal device is divided into two signal paths, differentially input, and transmits signals through the two signal paths. 3. The terminal device according to claim 2, wherein the two signal paths are output to outside through two signal lines. 4. Before a voice signal input from the microphone
The emergency notification system terminal device according to claim 1, wherein the terminal is directly output to the outside of the emergency notification system terminal device without passing through the buffer circuit. 5. An audio signal input from the microphone,
The emergency notification system terminal device according to claim 1 , wherein a capacitor is provided in series with a signal path to be output to the outside. 6. The emergency notification system according to claim 1, characterized in that inputting a voice signal input from the microphone to the hands-free voice communication apparatus including therein the emergency call system terminal equipment via a capacitor Terminal equipment. 7. A signal output from the buffer circuit is
A signal output to the outside of the emergency call system terminal equipment;
The emergency call system terminal device according to claim 1, comprising a road . 8. Before the audio signal acquired by the microphone
Means for inputting to the hands-free voice communication device via the buffer circuit, and means for outputting a voice signal from the microphone to the outside of the emergency notification system terminal device. An emergency call system terminal device according to claim 1 . 9. A signal path for inputting a voice signal obtained from said microphone to a hands-free voice communication device provided inside said emergency call system terminal equipment and a signal path for outputting to the outside of said emergency call system terminal equipment separately. Transmitting a voice signal through a buffer circuit
An emergency call system terminal device according to claim 1 . 10. Enter the audio signal acquired from the microphone, a signal path to be input to the hands-free voice communication device including the inside of the emergency call system terminal equipment via the buffer circuit, the sound from the microphone enter the signal, the emergency call system terminal device according to claim 1, wherein the buffer circuit characterized by comprising a signal path to be output to the outside of the emergency call system terminal equipment via another buffer circuit. 11. The power supply from a vehicle battery is interrupted.
When switching to the power supply from the auxiliary battery,
2. The emergency call system terminal device according to claim 1 , wherein said buffer power cutoff means cuts off the power of said buffer circuit. 12. An emergency call notification process, wherein the emergency call
The control unit inside the system terminal device recognizes and
The control signal from the control unit causes the buffer power shutoff
The emergency call system terminal equipment according to claim 1 , wherein a stage turns off the power supply of the buffer circuit. 13. Power supply from an auxiliary battery is executed.
Utilizing a control signal for performing, using the control signal,
2. The emergency call system terminal device according to claim 1 , wherein said buffer power cutoff means cuts off the power of said buffer circuit. 14. The method according to claim 1, wherein
The emergency call system terminal device described in
The emergency call system terminal equipment
An emergency call center that receives emergency call transmission signals
Emergency call system . 15. The vehicle position is displayed on a map screen, and
Notify the vehicle position to
With an internal circuit to make settings for guiding
Equipment and emergency call center in case of emergency
The method according to claim 1, wherein the notification is performed.
Equipment that requires voice input from emergency call system terminal equipment
In the in-vehicle system comprising:
The device is an audio signal input from a microphone that inputs audio
To the internal circuit, and the audio signal from the microphone is
The emergency call system via the navigation device
Output to external devices such as
On-board system . 16. The navigation device according to claim 16 , wherein
Audio signal input path from the
A capacitor is interposed between the signal output paths to
The DC component of the signal is blocked.
In- vehicle system as described . 17. The navigation device, wherein a buffer circuit is interposed in an audio signal input path from the microphone ,
Output to the internal circuit that performs voice recognition and the external device
The in- vehicle system according to claim 15 , wherein: 18. The navigation device according to claim 1, wherein the navigation device performs an audio signal input path from the microphone and performs voice recognition.
A buffer circuit is interposed between the microphone and the
Input to the internal circuit,
Audio signal from the external device via a capacitor
The in-vehicle system according to claim 15 , wherein the in-vehicle system outputs the data directly to a vehicle. 19. The navigation apparatus according to claim 1, further comprising a buffer circuit provided between a voice signal input path from the microphone and the internal circuit for performing voice recognition.
A voice signal is input to the internal circuit, and further from the microphone
Of the external device via another buffer circuit.
The in-vehicle system according to claim 15 , wherein the information is output to a device .