JP2001103145A - Terminal for emergent notice system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal for an emergent notice system that can select a received voice level of a voice speech in hand-free operation in the case of an emergency notice depending on a voltage of a power supply. SOLUTION: Upon the receipt of a signal denoting supply of a power of a main battery 5 whose voltage is high from a power supply controller 17, a control section 12 outputs a control signal to increase a received voice level to a level controller 20. When the level controller 20 receives the control signal to increase the received voice level, the level controller 20 increases an amplification level of the received voice signal from a hand-free device 19 and provides the voice signal at a comparatively high level to surely transmit the signal to a user. Upon the receipt of a signal denoting supply of power of an auxiliary battery 18 whose voltage is low from the power supply controller 17, the control section 12 outputs a control signal to decrease a received voice level to the level controller 20. When the level controller 20 receives the control signal to decrease the received voice level, the level controller 20 decreases an amplification level of the received voice signal from the hand-free device 19 and provides the voice signal at a comparatively low level to prevent voice distortion due to saturation of the voice level and to surely transmit the signal to a user.

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, which is mounted on a vehicle such as an automobile, and is used by police, emergency call centers, etc., which are responsible for emergency call systems, in emergency situations such as traffic accidents and sudden illnesses. The present invention relates to an emergency notification system terminal device for transmitting data such as vehicle position information and registered vehicles.

[0002]

2. Description of the Related Art Conventionally, an emergency call system is mounted on a vehicle such as an automobile and calls a center, such as a police station or an emergency call center, which has jurisdiction over the emergency call system via a base station of a communication carrier. 2. Description of the Related Art There is known an emergency call system terminal device provided with an emergency call communication means for performing processing.

The above-mentioned emergency call system terminal equipment enables, as emergency call notification means, transfer of position data using a data communication function and hands-free voice communication using a voice communication function.

Further, the emergency notification system terminal device starts operating by supplying power from a main battery mounted on a vehicle, and when the power supply is interrupted due to damage to the main battery due to an accident or the like, power supply from a built-in auxiliary battery. Switching to supply enables operation continuation.

[0005] The above-mentioned emergency call system terminal equipment includes:
During a hands-free voice call, the received voice level is amplified using a speaker amplifier or the like, and the received voice can be transmitted to the user by the sound of the speaker.

[0006]

In a conventional emergency call system terminal device, even when the power supply voltage fluctuates, for example, when the power supply from the main battery is switched to the power supply to the auxiliary battery, the amplification of the received voice signal is performed. The level was constant.

However, when the power supplied to the speaker amplifier or the like is switched to a low-voltage power supply such as an auxiliary battery without changing the amplification level of the received voice signal, voice distortion due to a narrow dynamic range occurs. Had the problem of doing so.

An object of the present invention is to solve the above-mentioned conventional problems, and to provide an emergency call system terminal capable of switching a reception voice level of a hands-free voice call at the time of an emergency call in accordance with a supply power supply voltage. The purpose is to provide equipment.

[0009]

According to a first aspect of the present invention, there is provided an emergency call system terminal device mounted on a vehicle and automatically sending an emergency call to a center by pressing an emergency call send button. Comprising a receiving voice level switching control means, by the receiving voice level switching control means, the reception voice level of the hands-free voice call at the time of emergency call,
This is an emergency notification system terminal device that can be switched according to the supply power supply voltage. With this configuration, even if the dynamic range of the speaker amplifier is reduced due to the supply voltage drop, the sound distortion due to the saturation of the reception sound level is achieved. Can be prevented.

According to a second aspect of the present invention, the received voice level switching control means recognizes a power supply voltage level and adjusts a sound level of the received voice in accordance with the recognized supplied voltage level. The emergency notification system terminal device according to claim 1, wherein the configuration prevents audio distortion due to saturation of the received audio level even when the dynamic range of a speaker amplifier or the like caused by a supply voltage drop is reduced. It becomes possible to do.

According to a third aspect of the present invention, when the power supply voltage level increases, the reception audio level switching control means performs control to increase the reception audio signal amplification level. Item 1 is an emergency call system terminal device according to Item 1. With this configuration, for example, in the case of power supply from a high-voltage power supply such as a main battery, by increasing the received sound level, The received voice can be reliably transmitted to the user.

According to a fourth aspect of the present invention, when the power supply voltage level drops, the reception audio level switching control means performs control to reduce the reception audio signal amplification level. Item 1 is an emergency call system terminal device according to Item 1. With this configuration, when the power supply is switched from a low-voltage power supply such as an auxiliary battery, the voice communication at the time of the emergency call is performed by lowering the received sound level. In this case, it is possible to prevent voice distortion due to voice level saturation and to surely transmit the received voice to the user.

According to a fifth aspect of the present invention, the reception audio level switching control means increases the reception audio signal amplification level when power is supplied from a main battery of the vehicle. The emergency call system terminal device described in the above description. With this configuration, in the case of power supply from the main battery, the received sound level is raised to ensure that the received sound is transmitted to the user in the voice call at the time of emergency call by raising the received sound level It becomes possible to communicate.

According to a sixth aspect of the present invention, the reception audio level switching control means reduces the reception audio signal amplification level when power is supplied from an auxiliary battery. This is an emergency call system terminal device, and by this configuration, in the case of power supply from the auxiliary battery, by lowering the received voice level, in the voice call at the time of the emergency call, to prevent voice distortion due to voice level saturation, The received voice can be reliably transmitted to the user.

The invention according to claim 7 of the present invention is characterized in that the received sound level switching control means switches the volume level using a built-in electronic volume function. With this configuration, when the supply power supply voltage is high, the received voice is transmitted to the user by performing control to increase the received voice level, and when the supply voltage is low, the received voice level is reduced. By lowering the sound level, sound distortion due to sound level saturation can be prevented, and the received sound can be reliably transmitted to the user.

According to an eighth aspect of the present invention, the reception audio level switching control means comprises a resistor and a switch, and switches the resistance value of the resistor by the switch according to a supply voltage level to thereby control the audio level. The emergency notification system terminal device according to claim 1, characterized in that, when the supply power supply voltage is high, the reception voice level is controlled so as to be received by the user. When voice is transmitted and the supply voltage is low, the received voice level is reduced to prevent voice distortion due to voice level saturation, and the received voice can be reliably transmitted to the user.

According to a ninth aspect of the present invention, there is provided an emergency call system terminal device according to any one of the first to eighth aspects, and the emergency call system terminal device is controlled by the emergency call system terminal device. An emergency call system including a center having a function of receiving an emergency call transmission signal. With this configuration, even when a signal received from the center is output, the reception audio level is adjusted according to the supply power supply voltage. When the supply power voltage is high, the received voice is transmitted to the user by performing control to increase the received voice level, and when the supply voltage is low, the received voice level is lowered to prevent voice distortion due to voice level saturation. Thus, the received voice can be reliably transmitted to the user.

[0018]

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

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
It is a block diagram which shows the structure of the emergency notification system terminal equipment in embodiment. In FIG. 1, the emergency call system terminal device 1 is mounted on a vehicle such as an automobile in the emergency call system, and is used by a police, an emergency call center, or another center in charge of the emergency call system at the time of an emergency such as a traffic accident or sudden illness. The vehicle transmission request is made by transmitting the vehicle position information and the registered vehicle data.

In FIG. 1, the communication antenna 2 transmits a transmission signal from the emergency report communication means 11 to the base station of the communication carrier and outputs a reception signal from the communication carrier to the emergency report communication means 11. The emergency call transmission button 3 is pressed by the user in an emergency such as a traffic accident or sudden illness to generate a signal for starting transmission processing.

In FIG. 1, a GPS antenna 4 is a GPS antenna.
Receive data from satellite. The main battery 5
Power is supplied to the electrical equipment of the vehicle, and also to the emergency notification system terminal equipment 1. The microphone 6 acquires a transmission audio signal from the user. The speaker 7 sounds a voice signal received from the emergency call center.

In the emergency call system terminal device 1, the emergency call communication means 11 responds to a call request signal from the control unit 12 by using a telephone number input from the control unit 12 via a base station of a communication carrier. The call originating process is started to the other party corresponding to the telephone number. In addition, when receiving a call response from the other party or a signal such as a busy signal that shifts during a call, the system shifts to voice call control or data communication control, and also controls a signal indicating that the call has shifted during a call. The information is output to the unit 12 and further input from the control unit 12, such as information on the traveling direction and direction of the vehicle, and data such as position information, corresponding to the telephone number via a base station of a communication carrier. It performs processing to make a call to the center that has jurisdiction over the emergency call system, such as the police or the emergency call center, which is the call partner.

The control unit 12 performs control to record data such as position information acquired from the position information acquisition processing unit 14 in the storage unit 15. Further, the operation signal from the emergency call transmission button 3 recognizes that an emergency call request has been made, and the position obtained from the position information acquisition processing unit 14 and stored in the storage unit 15 or the like in order to start the emergency call contact processing. Data such as information history is input, and from the storage unit 15, the telephone numbers of the police, emergency call center, and other centers in charge of the emergency call system are acquired, and the telephone numbers are used to send the emergency call notification means 11 to the emergency call contact means 11. When a call is made and a call response from the other party corresponding to the telephone number or a signal such as a busy signal is received from the emergency call contact means 11 to make a transition to a busy state, the state shifts to a call state. The location information history data obtained from the location information acquisition processing unit 14 is recognized, and the police or emergency call It performs a process of outputting the emergency call communication means 11 a signal for sending to a center that has jurisdiction over the emergency call system, such as centers.

The gyro sensor 13 generates information such as the traveling direction and direction of the vehicle. The position information acquisition processing unit 14 provides the control unit 12 with data from the gyro sensor 13, GPS
The receiver 16 outputs data such as position information generated by data received from the GPS antenna 4 to the control unit 12.

The storage unit 15 is generated by the location information acquisition processing unit 14 and the telephone number of a center that controls the emergency call system such as the police and the emergency call center, the registration number of the vehicle on which the emergency call system terminal device 1 is mounted. A process for storing information such as position information and outputting recorded data in response to a request signal from the control unit 12 is performed.

The GPS receiver 16 performs a process of outputting data such as position information to the position information acquisition processing unit 14 based on the data obtained from the GPS antenna 4.

The power supply control device 17 monitors the power supply voltage from the main battery 5 and, when the power supply voltage from the main battery 5 falls,
The power supply is switched to the power supply from 18, and the operation of the emergency notification system terminal device 1 is maintained.

When the main battery 5 is damaged due to a traffic accident or the like and the power supply from the main battery 5 is interrupted, the auxiliary battery 18 supplies power to the emergency notification system terminal device 1 instead of the main battery 5.

The hands-free device 19 has a function of realizing a hands-free voice call by performing echo cancellation and howling suppression control on a voice signal received from the emergency call center and a voice signal transmitted from the user. . The level control device 20 has a function of controlling the transmission audio amplification level and the reception audio amplification level.

Next, the operation of the embodiment of the present invention will be described. In FIG. 1, a position information acquisition processing unit 14 generates position information data based on data from the gyro sensor 13, data received by the GPS receiver 16 from the GPS antenna 4, and the like. The control unit 12 periodically acquires data such as position information from the position information acquisition processing unit 14, and records the data in the storage unit 15.

The user presses the emergency call button 3 in an emergency such as a traffic accident or sudden illness. The emergency call transmission button 3 is a control unit that, when pressed by a user, outputs a signal indicating that the button has been pressed.
Output to 12. The control unit 12 recognizes that there has been an emergency call transmission request from the operation signal from the emergency call transmission button 3,
Start emergency call processing.

The control unit 12 obtains the data such as the position information accumulated from the storage unit 15 and the telephone numbers of the centers that control the emergency call system such as the police and the emergency call center. Report communication means 11
Make a phone call request to.

Using the communication antenna 2, the emergency call notification means 11 starts a telephone call process to the other party corresponding to the telephone number via the base station of the communication carrier. When the emergency call notification means 11 receives a call response from the other party, 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 the talking state, and shifts to voice call control or data communication control. At the same time, it outputs a signal to the control unit 12 informing that the call has been transferred.

The control unit 12 determines that the call was successful, and transmits data such as position information via the base station of the communication carrier or the like to the police or emergency call center corresponding to the telephone number corresponding to the telephone number. A process for transmitting the information to the center that controls the notification system is performed.

When the data communication is completed, the emergency call communication means 11 is controlled to shift from the data communication to the voice communication, and the voice signal path is changed to the hands-free device.
Perform processing to connect to 19. When the emergency call communication means 11 shifts to the voice call state, a voice call is started between the emergency call center and the user. The received voice signal obtained from the emergency call center is input to the hands-free device 19 via the emergency call communication means 11.

The hands-free device 19 performs processes such as howling control and echo cancellation on the received audio signal,
Output to the level control device 20. The level control device 20 having a speaker amplifier or the like amplifies the received audio signal and outputs the amplified signal to the speaker 7, thereby sounding the speaker 7 and transmitting the sound to the user.

The voice transmitted from the user is transmitted to the microphone 6
And input to the hands-free device 19. The hands-free device 19 performs a process such as howling control and echo cancellation on the transmission audio signal,
To the emergency call center via.

The control unit 12 is supplied with the type of power supply and the power supply voltage value from the power supply control device 17. Further, the control unit 12 outputs a control signal to the level control device 20 according to the type of power supply and the power supply voltage.

Next, a case where level control is performed according to the type of power supply will be described. When a signal indicating power supply from the main battery 5 having a high power supply voltage is input from the power supply control device 19, the control unit 12 outputs a control signal for increasing the reception audio level to the level control device 20. When the level control device 20 receives a control signal for increasing the received sound level, the amplification level of the received sound from the hands-free device 19 is increased, and the sound is emitted at a relatively high level, so that the user can be surely provided. introduce.

Further, when a signal indicating power supply from the auxiliary battery 18 having a low power supply voltage is input from the power supply control device 17, the control section 12 outputs a control signal for lowering the received voice level to the level control device 20. I do.

When the level control device 20 receives a control signal for lowering the received voice level, it reduces the amplification level of the received voice from the hands-free device 19 and sounds at a relatively low level. Speech distortion due to saturation is prevented and transmitted to users reliably.

(Second Embodiment) Next, an emergency call system terminal device according to a second embodiment of the present invention will be described. The second embodiment of the present invention shows how the above-described level control device controls the amplification level of the received audio signal to be specifically varied.

FIG. 2 is a diagram showing a configuration of a level control device according to a second embodiment of the present invention. In FIG. 2, the first
Operational amplifier (OP.Amp1), second operational amplifier (OP.Amp2)
Represents a differential amplifier circuit that amplifies the signal level,
R1, R2, R3, R4, and R5 represent resistors, and SW represents an analog switch.

In FIG. 2, the control unit 12 includes a control unit similar to the control unit 12 shown in FIG.
The level control device 20 is a hands-free device similar to the hands-free device 19 shown in FIG.
20 shows a level control device similar to 20.

In FIG. 2, when power is supplied from a high-voltage power supply such as the main battery 5, the analog switch SW
Is turned off. In this case, the received audio signal is input from the hands-free device 19 to the level control device 20 and is amplified by the level control device 20.

In the case of an amplifier circuit using the first operational amplifier (OP.Amp1), the amplification level can be represented by R3 / R1. The received audio signal amplified by the amplifier circuit is sounded by the speaker 7 and transmitted to the user.

When power is supplied from a low-voltage power supply such as the auxiliary battery 18, control for turning on the analog switch SW is performed. The amplification level of the received voice using the first operational amplifier (OP.Amp1) can be represented by {(R2 × R3) / (R2 + R3)} / R1.

As described above, by controlling the amplification level of the first operational amplifier (OP.Amp1) using the switch SW and the resistors R1, R2, and R3, the reception audio level can be adjusted according to the supply power supply voltage. When the supply power voltage is high, the received voice is transmitted to the user by performing control to increase the received voice level, and when the supply voltage is low, the voice distortion due to the voice level saturation is reduced by lowering the received voice level. Prevent and securely transmit the received voice to the user.

[0049]

As is apparent from the above description, according to the present invention, in the case of a power supply having a high voltage such as a main battery, control is performed to increase the received voice level, so that the user can receive the received voice reliably. In the case of a power supply that transmits and further supplies a low voltage such as an auxiliary battery, the emergency notification system can reduce the received voice level to prevent voice distortion due to voice level saturation and reliably transmit the received voice to the user. Terminal equipment can be provided.

[Brief description of the drawings]

FIG. 1 is a 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 diagram illustrating a configuration of a level control device according to a second 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 Main battery 6 Microphone 7 Speaker 11 Emergency call communication means 12 Control unit 13 Gyro sensor 14 Location information acquisition processing unit 15 Storage unit 16 GPS receiver 17 Power supply Control device 18 Auxiliary battery 19 Hands-free device 20 Level control device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) H04M 11/04 H04M 11/04 F term (Reference) 5C087 AA37 AA44 BB12 BB64 BB65 BB74 DD03 DD14 EE14 FF01 FF04 FF05 FF13 FF14 FF17 FF23 FF30 GG18 GG23 GG55 GG57 GG69 GG83 5H180 AA01 BB04 BB05 CC12 EE08 FF05 FF13 FF25 5J090 CN04 FN03 HN19 5K027 AA16 BB03 DD14 DD16 EE04 GG03 HH03 5K101 UKK14NN

Claims (9)

[Claims] 1. An emergency call system terminal device mounted on a vehicle and automatically sending an emergency call to a center by pressing an emergency call transmission button, comprising: a reception sound level switching control means; An emergency call system terminal device capable of switching a received voice level of a hands-free voice call at the time of an emergency call according to a supply power voltage. 2. The emergency reception device according to claim 1, wherein said reception audio level switching control means recognizes a power supply voltage level and adjusts a sound level of the reception audio in accordance with the recognized supply voltage level. Notification system terminal equipment. 3. The emergency notification system terminal device according to claim 1, wherein said reception voice level switching control means performs control to increase a reception voice signal amplification level when a power supply voltage level rises. 4. The emergency notification system terminal device according to claim 1, wherein said reception voice level switching control means performs control to reduce a reception voice signal amplification level when a power supply voltage level drops. 5. The emergency notification system terminal device according to claim 1, wherein said reception voice level switching control means increases a reception voice signal amplification level when power is supplied from a main battery of the vehicle. 6. The emergency notification system terminal device according to claim 1, wherein said reception voice level switching control means reduces the reception voice signal amplification level when power is supplied from an auxiliary battery. 7. The emergency notification system terminal device according to claim 1, wherein said received voice level switching control means switches the volume level using a built-in electronic volume function. 8. The reception audio level switching control means according to claim 1, wherein the reception audio level switching control means comprises a resistor and a switch, and switches the audio level by switching the resistor by the switch according to the audio level. Emergency call system terminal equipment. 9. An emergency call system terminal device according to claim 1, wherein said emergency call system terminal device is supervised, and an emergency call transmission signal transmitted from said emergency call system terminal device is received. An emergency call system, comprising: a center having a function.