JP3260127B2 - In-vehicle terminal device 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 in-vehicle terminal device mounted on a vehicle such as an automobile for performing data communication and voice communication with a device outside the vehicle using a wireless device such as a mobile phone.
The present invention relates to an emergency notification system terminal device and an emergency notification system including the on-vehicle terminal device.

[0002]

2. Description of the Related Art Conventionally, an in-vehicle terminal device that is mounted on a vehicle such as an automobile and performs data communication and voice communication with a device outside the vehicle using a wireless device such as a mobile phone without an auxiliary battery has been used. Devices that supply power only from a battery have been known. In these devices, when the power supply from the main battery is cut off, the operation cannot be continued.

[0003]

However, in the conventional in-vehicle terminal device, it is impossible to continue the operation of the in-vehicle terminal device when the power supply from the main battery is interrupted due to a traffic accident or a failure. Was. In the case of this type of in-vehicle terminal device, it is indispensable to maintain the operation of the device regardless of the state of the vehicle.

The present invention solves such a problem in the prior art, and is intended to surely maintain the operation of the apparatus even when the power supply from the main battery of the vehicle is cut off due to an accident, a failure, or the like. It is an object of the present invention to provide an in-vehicle terminal device that can be used.

[0005]

In order to solve the above-mentioned problems, an on-vehicle terminal device according to the present invention is provided in place of the main battery when the power supply from a vehicle main battery is cut off. A power supply control circuit monitors the voltage of the main battery, and switches to power supply from the auxiliary battery when the voltage of the main battery falls below a certain set voltage. When the voltage of the main battery rises and the state shifts to a state where a voltage for operating the on-vehicle terminal device can be secured, control is performed so as to switch to power supply from the main battery.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is an in-vehicle terminal device capable of performing data communication and voice communication with a device outside the vehicle wirelessly from the vehicle. into play <br/> if the supply power voltage drops, a power control circuit for switching the power supply to the auxiliary battery for supplying power to the vehicle-mounted terminal device in place of the main battery, the power supply control circuit, the main Means for monitoring the voltage of the battery ;
Means for monitoring the voltage of the terry controls the on-board terminal device.
A AD converter Gosuru control unit, when the drops below the set voltage with the voltage of the previous SL main battery, a vehicle terminal apparatus and performs control to switch the power supply from the auxiliary battery, failure of the main battery, an accident, even at the time of voltage drop, such as at engine start, supplies power by the auxiliary battery, AD
Converter measures main battery power supply voltage
And the measured voltage from the AD converter is equal to or less than a certain voltage value.
If it detects that it has fallen,
By switching the power supply, an effect that the operation of the vehicle mounting the terminal device can be reliably maintained.

[0007] The invention described in claim 2 of the present invention is directed to a vehicle.
Data communication and voice communication with equipment outside the vehicle via wireless
An in-vehicle terminal device that can perform
When the power supply voltage from the battery drops,
Supply power to the in-vehicle terminal device instead of the main battery
Power control circuit to switch power to auxiliary battery to be supplied
Wherein the power control circuit is provided for the main battery.
Means for monitoring the voltage;
Means for monitoring the voltage is provided by a power supply provided in the power supply control circuit.
Pressure comparator, wherein the voltage of the main battery is
When the voltage drops below a certain set voltage, the auxiliary battery
A vehicle mounting terminal you <br/> characterized that you perform control to switch the power supply from over, constant in voltage comparator
A function to recognize the voltage value is provided, and the comparator
If power supply voltage from the down battery is detected that is below a certain voltage value, by switching the power supply from the auxiliary battery, such an action can reliably maintain the operation of the vehicle-mounted terminal.

According to a third aspect of the present invention, a vehicle
Data communication and voice communication with equipment outside the vehicle via wireless
It is an in-vehicle terminal device that can perform
If the power supply voltage from the
Supply power to the in-vehicle terminal device instead of in-battery
Power control circuit to switch power to the auxiliary battery
Wherein the power supply control circuit includes a power supply for the main battery.
Means for monitoring the voltage of the main battery.
Monitoring by the control unit that controls the in-vehicle terminal device.
And the control unit operates according to the interrupt signal.
Wherein a vehicle mounting terminal you and switches the power supply of the auxiliary battery F, the control unit is a main battery
Interrupts without constantly monitoring power from
In the interrupt process.
By determining the instantaneous Te, change to another power supply from auxiliary battery, an effect that can reliably maintain the operation of the vehicle-mounted terminal.

According to a fourth aspect of the present invention, a vehicle
Data communication and voice communication with equipment outside the vehicle via wireless
It is an in-vehicle terminal device that can perform
If the power supply voltage from the
Supply power to the in-vehicle terminal device instead of in-battery
Power control circuit to switch power to the auxiliary battery
Wherein the power supply control circuit includes a power supply for the main battery.
Means for monitoring the pressure from the auxiliary battery.
While the operation is continued by the power supply, the main
When the battery voltage shifts to a certain voltage or higher
In a vehicle mounting terminal it said switching Rukoto the power supply to the main battery, the main battery
When the power supply voltage from the
By continuing operation with the power supply from Terry
Therefore, the power consumption of the auxiliary battery can be prevented .

The invention according to claim 5 of the present invention is characterized in that the AD
Monitoring from the main battery input to the converter
Power supply divided by resistance division.
The main voltage higher than the operating voltage of the control unit
A vehicle-mounted terminal according to claim 1 Symbol mounting, characterized in that to enable monitoring of the battery voltage, the control unit, before
It is driven by the power supply from the main battery,
The control unit monitors the supply power of the main battery.
From the main battery
Even if the power supply voltage of the
Switch to power supply from auxiliary battery
It has the effect of being able to.

[0011] The invention of claim 6, wherein the present invention, before Symbol Mei
Battery when switching from the auxiliary battery to the auxiliary battery
The main battery from the auxiliary battery is
A vehicle-mounted terminal according to claim 5 Symbol mounting set voltage and set high to said Rukoto the case of returning to Tteri, supply power voltage from the main battery is gradually lowered
Even in the case, two batteries
Operation due to frequent switching of power supply from
It has an effect that an unstable state can be prevented .

[0012] The invention of claim 7, wherein the present invention, before Symbol Mei
The set voltage for battery monitoring is controlled by the control unit.
Set to a voltage higher than the voltage, the operating voltage of the control unit
The in- vehicle terminal device according to any one of claims 1 to 6, wherein the power supply is switched to the power supply from the auxiliary battery in the secured state , even when the power supply voltage from the main battery drops . For auxiliary battery
A state in which the operating voltage of the control unit that controls switching is secured
Switch to the auxiliary battery under the control of the control unit
By obtaining, it has the effect of Ru <br/> can reliably maintain the operation of the vehicle-mounted terminal.

The invention according to claim 8 of the present invention is the invention according to claim 1.
Emergency call from the in-vehicle terminal device
The center that has jurisdiction over the emergency call system by pressing the contact button
Emergency call system that automatically makes emergency calls
Is a car mounting terminal equipment shall be the features and equipped with this, road traffic
Emergency call system that requires reliable operation in case of emergency
System, the main battery is
Damaged, power supply from the main battery cut off
Power supply from the auxiliary battery
Operation can be maintained reliably, and emergency
Such an action can be determined promptly by using an fault processing reliably.

According to the ninth aspect of the present invention, an eighth aspect is provided.
Emergency call system terminal equipment, including the in-vehicle terminal equipment of the serial mounting
And an emergency call transmission signal from the emergency call system terminal device.
Emergency call system including a center equipped with
It is a stem that can be used in emergencies,
When the power supply from the main battery is cut off
Switch to power supply from auxiliary battery
The operation of the emergency call system terminal equipment
It is possible to maintain
Serial emergency situation, with the effect that kills in a securely transmits an abnormal situation.

[0015]

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram showing a configuration of an in-vehicle terminal device according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 1 denotes an in-vehicle terminal device, which is mounted on a vehicle such as an automobile, has a function of performing data communication and voice communication with a device 5 outside the vehicle using a wireless device 2 and the like, and has a power control circuit 12. Then, the power supply voltage from the main battery 4 is monitored, and even when the power supply from the main battery 4 is cut off, the continuation of the operation is maintained by switching to the power supply from the auxiliary battery 13. Reference numeral 2 denotes a wireless device using a mobile telephone network or the like, which performs data transmission / reception, voice communication, and the like with a device 5 outside the vehicle by transmission / reception control from the on-board terminal device 1 and an incoming signal from the device 5 outside the vehicle. To notify the in-vehicle terminal device 1 of the incoming call, control the incoming call from the in-vehicle terminal device 1 to shift to a call state, and perform processing such as data transmission / reception and voice communication with the device 5 outside the vehicle. Note that the wireless device 2 may be provided inside the vehicle-mounted terminal device 1. Reference numeral 3 denotes a communication antenna which transmits a transmission signal from the wireless device 2 to a device 5 outside the vehicle via a base station of a communication carrier and outputs a reception signal from the device 5 outside the vehicle to the wireless device 2. Perform the following processing. Reference numeral 4 denotes a main battery, which supplies power to the electric equipment of the vehicle and also supplies power to the in-vehicle terminal device 1. Reference numeral 5 denotes an out-of-vehicle device such as a base station of a communication carrier or a management station that manages and supervises vehicles via the base station of the communication carrier. Transmission and reception with the in-vehicle terminal device 1 by transmission are performed.

In the in-vehicle terminal device 1, reference numeral 11 denotes a control unit constituted by a microcomputer or the like, which controls the entire in-vehicle terminal device 1 and performs processing such as data communication control with the wireless device 2. Further, it monitors the power supply voltage signal of the main battery 4 from the power supply control circuit 12 and outputs a control signal for instructing switching to the power supply from the auxiliary battery 13 when the power supply voltage from the main battery 4 drops. Reference numeral 12 denotes a power supply control circuit that supplies power from the main battery 4 to the entire in-vehicle terminal device 1, monitors the power supply voltage of the main battery 4, and outputs the monitoring result to the control unit 11. Do. Further, when a power supply switching instruction signal is input from the control unit 11, control is performed to switch the power supply from the main battery 4 to the power supply from the auxiliary battery 13. Reference numeral 13 denotes an auxiliary battery, and a main battery 4
When the power supply from is interrupted, the power supply for maintaining the operation of the in-vehicle terminal device 1 is performed instead of the main battery 4.

Next, the operation of the first embodiment will be described. In FIG. 1, when outputting vehicle information to the outside of the vehicle, the control unit 11 outputs a telephone number, a transmission signal, and the like of the device 5 outside the vehicle to the wireless device 2. The wireless device 2 performs a communication corresponding to the telephone number and a calling process to a call partner, and further, when receiving an incoming signal from the call partner, the control unit 1
1 to output a signal indicating that the call has been transferred. The control unit 11 shifts to a data communication process such as outputting vehicle information or a voice call due to the shift to the call state.

The power supply control circuit 12 includes a main battery 4
Monitor the power supply from. If the power supply from the main battery 4 drops below a certain voltage level by the monitoring, the control unit 11 outputs a signal indicating that the power supply voltage has dropped. The control unit 11 outputs a control signal for switching to the auxiliary battery 13 instead of the main battery 4 to a power control circuit 12. The power supply control circuit 12 continues the operation of the in-vehicle terminal device 1 by performing control to switch to power supply from the auxiliary battery 13.

When the power supply voltage from the main battery 4 recovers, the power supply control circuit 12 outputs to the control unit 11 a signal indicating that the power supply voltage of the main battery 4 has recovered. The control unit 11 outputs a power switching control signal from the auxiliary battery 13 to the main battery 4 again. The power supply control circuit 12 performs control to return from the auxiliary battery 13 to the power supply of the main battery 4 according to a control instruction from the control unit 11.

As described above, according to the first embodiment of the present invention, when the voltage of the main battery 4 drops, the power supply control circuit 12 performs the control of switching to the power supply from the auxiliary battery 13, whereby Battery 1
In the event of a voltage drop such as a failure, accident, engine start, or the like, power is supplied from the auxiliary battery 13 and the operation of the in-vehicle terminal device 1 can be maintained.

(Embodiment 2) FIG. 2 is a block diagram showing a configuration of an in-vehicle terminal device according to Embodiment 2 of the present invention. The second embodiment differs from the first embodiment shown in FIG. 1 in that an AD converter 111 is provided in the control unit 11 and a voltage control circuit 14 is provided.
The other configuration is the same as that shown in FIG. In FIG. 2, reference numeral 14 denotes a voltage control circuit, which performs a process of reducing the power supply voltage supplied from the main battery 4 by resistance division or the like and outputting the reduced voltage to the control unit 11.
In the control unit 11, reference numeral 111 denotes an AD converter;
A process of inputting a voltage signal from the voltage control circuit 14 and converting the voltage signal into a digital signal that can be determined by a microcomputer or the like included in the control unit 11 is performed.

Next, an operation of switching control from the main battery 4 to the auxiliary battery 13 according to the second embodiment will be described. In FIG. 2, data transmission / reception and voice call control are the same as in the first embodiment. In the second embodiment, the voltage control circuit 14 receives a power supply from the main battery 4 and performs pressure reduction by a resistance dividing process or the like so that the maximum voltage value is equal to or less than the drive voltage of the microcomputer of the control unit 11. Output to the control unit 11. An AD converter 111 included in the control unit 11 receives the output voltage from the voltage control circuit 14 and further performs a process of digitally converting the voltage signal. The control unit 11 receives the digital signal from the AD converter 111 and grasps the power supply voltage of the main battery 4. When the power supply voltage drops due to a failure of the main battery 4 or the like, the value of the output signal from the AD converter 111 also drops. Further, the control unit 11 detects the digital signal whose power supply voltage has dropped from the AD converter 111, and
When it is determined that the voltage for driving the battery cannot be secured, the power supply circuit 12 supplies the power to the auxiliary battery 1.
3 is output. Power control circuit 12
Performs the control of switching to the power supply from the auxiliary battery 13 to continue the operation of the in-vehicle terminal device 1.

When the supply voltage from the main battery 4 is restored, the AD converter 111 outputs the restored supply voltage digital signal to the control unit 11. When the control unit 11 determines that the supply power supply voltage from the main battery 4 has recovered, it outputs a control signal for switching to the power supply from the main battery 4. The power supply control circuit 12 receives a control signal from the control unit 11
Control for switching to power supply from the main battery 4 is performed.

Next, an example of a power supply switching control method will be described with reference to FIG. In the control of the control unit 11, the main battery 4
The detection voltage of the main battery 4 in the control for switching from the auxiliary battery 13 to the auxiliary battery 13 is set to a lower value than the detection voltage in the control for switching from the auxiliary battery 13 to the main battery 4 when the power supply from the main battery 4 is restored. , A certain level of voltage difference is provided, so that even when the power supply voltage from the main battery 4 decreases and fluctuates near the detection level, unnecessary power supply switching is not performed, and when the power returns, it is ensured. Control for switching to the power supply from the main battery 4 can be performed.

Next, the configuration of the voltage control circuit 14 will be described.
This will be described with reference to FIG. The voltage control circuit 14 inputs the power supply from the main battery 4 from one end of the resistor R1. The other end of the resistor R1 is connected to one end of the resistor R2, and the other end of the resistor R2 is connected to GND. The output signal to the control unit 11 is output from the connection between R1 and R2. In FIG. 4, when the power supply from the main battery 4 is V1 and the output signal to the control unit 11 is V2, V2 = ２R2 / (R1 + R
2) It can be represented by ΔV1. Main battery 4
Even if the maximum value of the supply power voltage V1 from the controller 11 is input, R2 is controlled so that V2 does not exceed the operating voltage of the control unit 11.
By setting 1 and R2, the control unit 11 can monitor the power supply.

As described above, according to the second embodiment of the present invention, the power supply voltage of the main battery 4 is measured by the AD converter 111, and it is detected that the measured voltage from the AD converter 111 has become equal to or less than a predetermined voltage value. if you did this,
By switching to the power supply from the auxiliary battery 13, the operation of the in-vehicle terminal device 1 can be continued. In addition, by having the voltage control circuit 14, even when the power supply voltage from the main battery 4 drops, the control unit 11 that controls the switching to the auxiliary battery 13 maintains the operation voltage of the control unit 11.
By switching to the auxiliary battery 13 under the control of, the operation of the in-vehicle terminal device 1 can be continued. Furthermore, the setting of the monitoring voltage of the main battery 4
By setting the detection voltage when returning from the auxiliary battery 13 to the main battery 4 higher than the detection voltage when shifting from the main battery 4 to the auxiliary battery 13, the power supply switching between the two batteries does not occur frequently. It becomes possible to do so.

(Embodiment 3) Fig. 5 is a block diagram showing a configuration of an in-vehicle terminal device according to Embodiment 3 of the present invention, which is different from Embodiment 1 shown in Fig. 1. Is that the voltage control circuit 12 is provided with the voltage comparator 121, and the other configuration is the same as that shown in FIG.
Reference numeral 121 denotes a voltage comparator which performs control to output a result of comparison with a certain reference voltage.

Next, the operation of switching control from the main battery 4 to the auxiliary battery 13 according to the third embodiment will be described. In FIG. 5, data transmission / reception and voice call control are the same as in the first embodiment. In the third embodiment, the voltage comparator 121 receives power from the main battery 4 and outputs a result of comparison with a reference voltage generated by the power control circuit 12 to the control unit 11. When the power supply voltage of the main battery 4 drops due to a failure of the main battery 4 and the power supply voltage of the main battery 4 drops below the reference voltage compared by the voltage comparator 121, the voltage power supply voltage of the main battery 4 Is output to the control unit 11. When the control unit 11 receives the output signal from the voltage comparator 121 and determines that the voltage for driving the vehicle-mounted terminal device 1 cannot be secured, the control unit 11 switches the power supply to the power control circuit 12 and the auxiliary battery 13. Outputs control signal. The power supply control circuit 12 continues the operation of the in-vehicle terminal device 1 by performing control to switch to power supply from the auxiliary battery 13.

As described above, according to the third embodiment of the present invention, when the voltage comparator 121 detects that the power supply voltage from the main battery 4 has fallen below a certain voltage value, the power supply from the auxiliary battery 13 , The operation of the vehicle-mounted terminal device 1 can be continued.

(Embodiment 4) FIG. 6 is a block diagram showing a configuration of an emergency call system terminal device according to Embodiment 4 of the present invention. In FIG. 6, reference numeral 201 denotes an emergency notification system terminal device, which is mounted on a vehicle such as an automobile.
In an emergency such as a traffic accident or sudden illness, the current position information of the vehicle, data of the registered vehicle, and the like are transmitted to the emergency call center to request the police or fire department to dispatch the vehicle. Reference numeral 202 denotes a communication antenna similar to the communication antenna 3 shown in FIG. 1, which performs processing for transmitting a signal transmitted from the emergency report communication means 211 to the base station of the communication provider and transmits a signal received from the communication provider for emergency notification. A process for outputting to the communication unit 211 is performed. An emergency call transmission button 203 is pressed by a user in an emergency such as a traffic accident or sudden illness to generate a signal for starting a transmission process. 204 is a GPS antenna,
Receives data from GPS satellites. Reference numeral 205 denotes a main battery corresponding to the main battery 4 in FIG.

In the emergency notification system terminal device 201, reference numeral 211 denotes an emergency notification communication means similar to the wireless device 2 in FIG. 1, which responds to a transmission request signal from the control unit 212 by a telephone number input from the control unit 212. Initiated the call origination process to the other party corresponding to the telephone number via the carrier's base station, etc., and received a call response from the other party, or a signal during the call such as a busy signal, etc. In this case, the process shifts to voice call control or data communication control, and outputs a signal indicating that the call has shifted to a call to the control unit 212. Further, information such as the traveling direction and direction of the vehicle input from the control unit 212, Process of transmitting data such as location information and location information to the emergency call center corresponding to the telephone number via the carrier's base station, etc. Do.

Reference numeral 212 denotes a control unit similar to the control unit 11 shown in FIG. 1. The control unit 212 performs control for recording data such as position information acquired from the position information acquisition processing unit 214 in the storage unit 215, and transmits an emergency call button 203 In response to an operation signal from the server, the mobile terminal recognizes that an emergency call request has been made, and inputs data such as the history of position information accumulated in the storage unit 215 and the like in order to start the emergency call communication process. Acquires the telephone number of the reporting center, makes a call request to the emergency call contact means 211 using the telephone number, and further sends a call response from the call partner corresponding to the telephone number from the emergency call contact means 211, Alternatively, when a signal such as a busy signal that shifts during a call is received, it is recognized that the call has shifted to a call state, and the location information history data is transmitted to a base station of a communication carrier. Performs a process of outputting the emergency call communication means 211 a signal for sending to the emergency call center is a communication partner corresponding to the telephone number via.

A gyro sensor 213 generates information such as the traveling direction and direction of the vehicle. Reference numeral 214 denotes a position information acquisition processing unit which outputs data from the gyro sensor 213 and data such as position information generated from data received from the GPS antenna 204 by the GPS receiver to the control unit 212. . A storage unit 215 stores information such as the telephone number of the emergency call center, the registration number of the vehicle equipped with the emergency call system terminal device 201, the position information generated by the position information acquisition processing unit 214, and the control unit. A process of outputting the recorded data in response to the request signal from 212 is performed. A GPS receiver 216 performs a process of outputting data such as position information to the position information acquisition processing unit 214 based on data obtained from the GPS antenna 204. Reference numeral 217 denotes a power supply control circuit similar to the power supply control circuit 12 in FIG. 1, and 218 denotes an auxiliary battery similar to the auxiliary battery 13 in FIG.

In FIG. 6, a position information acquisition processing unit 214
Generates position information data based on data from the gyro sensor 213, data received by the GPS receiver 216 from the GPS antenna 204, and the like. The control unit 212 performs a process of periodically acquiring data such as position information from the position information acquisition processing unit 214 and storing the data in the storage unit 215. The user presses the emergency call button 203 in an emergency such as a traffic accident or sudden illness. The emergency call transmission button 203 is used by the control unit 212 to generate a signal indicating that the button has been pressed by the user.
Output to The control unit 212 recognizes that an emergency call transmission request has been made based on the operation signal from the emergency call transmission button 203, and starts the emergency call process. The control unit 212 obtains the data such as the accumulated position information from the storage unit 215 and the telephone number of the emergency call center, and requests the emergency call communication unit 211 to make a call using the telephone number. The emergency call notification means 211 is provided for the communication antenna 20.
Using 2, the telephone call processing is started to the other party corresponding to the telephone number via the base station of the communication carrier.
Emergency call notification means 211 is a call response from the other party,
Or, when a signal that shifts during a call such as a busy signal is received, it is recognized that the call has shifted to a call state, and a signal indicating that the shift has been made during a call, while shifting to voice call control or data communication control, Output to the control unit 212. The control unit 212 determines that the call is successful, and performs a process of transmitting data such as position information to the emergency call center corresponding to the telephone number via the base station of the communication carrier.

The power supply control circuit 217 monitors the power supply from the main battery 205. If the power supply from the main battery 205 drops below a certain voltage level by the monitoring, a signal indicating that the power supply voltage has dropped is output to the control unit 212. The control unit 2
Reference numeral 12 denotes a power control circuit 2 for transmitting a control signal for switching to the auxiliary battery 218 instead of the main battery 205.
17 is output. The power supply control circuit 217 continues the operation of the emergency notification system terminal device 201 by performing control to switch to power supply from the auxiliary battery 218.

As described above, according to the fourth embodiment of the present invention, even when the power supply from main battery 205 is cut off in the event of an emergency or a vehicle abnormality, the power supply from auxiliary battery 218 can be maintained. By switching to the supply, the emergency notification system terminal device 201
Can be maintained, and the emergency or abnormal situation can be reliably transmitted to the emergency notification center.

[0038]

As is apparent from the above description, in the on-vehicle terminal device according to the present invention, the power supply control circuit monitors the voltage of the main battery and operates when the voltage of the main battery falls below a certain set voltage. The power supply is controlled by switching to the power supply from the auxiliary battery, so even in the event of a voltage drop such as a main battery failure, accident, engine start, etc., the power is supplied from the auxiliary battery and the operation of the onboard terminal device is reliably maintained. It has the effect of being able to.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an in-vehicle terminal device according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram showing a configuration of an in-vehicle terminal device according to Embodiment 2 of the present invention.

FIG. 3 is a voltage displacement diagram showing an example of a power supply switching control method according to a second embodiment.

FIG. 4 is a block diagram illustrating a configuration of a voltage control circuit according to a second embodiment.

FIG. 5 is a block diagram showing a configuration of an in-vehicle terminal device according to Embodiment 3 of the present invention.

FIG. 6 is a block diagram showing a configuration of an emergency call system terminal device according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 On-board terminal device 2 Radio 3 Communication antenna 4 Main battery 5 Outside device 11 Control unit 12 Power control circuit 13 Auxiliary battery 14 Voltage control circuit 111 AD converter 121 Voltage comparator 201 Emergency notification system terminal device 202 Communication antenna 203 Emergency notification transmission Button 204 GPS antenna 205 Main battery 211 Emergency call notification unit 212 Control unit 213 Gyro sensor 214 Position information acquisition processing unit 215 Storage unit 216 GPS receiver 217 Power supply control circuit 218 Auxiliary battery

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ identification symbol FI H04M 1/72 H04B 7/26 H H04Q 7/38 109G (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04B 7 / 26 B60R 16/02 660 B60R 16/02 670 G08B 25/10 H02J 9/06 503 H04M 1/72 H04Q 7/38

Claims (9)

(57) [Claims] 1. A a vehicle terminal apparatus capable of outside equipment and data and voice over a radio from a vehicle, the supply power voltage from the main battery of the vehicle
A power control circuit that switches power to an auxiliary battery that supplies power to the in-vehicle terminal device in place of the main battery when the power falls, the power control circuit includes a unit that monitors a voltage of the main battery ; Said
Means for monitoring the voltage of the main battery is
A AD converter control unit for controlling the end device, before SL when drops below the set voltage with the voltage of the main battery, the vehicle-mounted terminal device and performs control to switch the power supply from the auxiliary battery . 2. A device and a device outside the vehicle that communicate with each other via wireless communication.
In-vehicle terminal device capable of data communication and voice communication
And the power supply voltage from the vehicle's main battery is
In case of a drop, the car replaces the main battery.
Power to the auxiliary battery that supplies power to the
A power supply control circuit for switching the power supply, wherein the power supply control circuit
Means for monitoring the voltage of the main battery,
The means for monitoring the voltage of the main battery is provided by the power supply control.
A voltage comparator provided in the control circuit.
When the battery voltage drops below a certain set voltage
In addition, there is a system for switching to power supply from the auxiliary battery.
Your car mounting terminal equipment shall be the features that you perform. (3) Data is transmitted from a vehicle to a device outside the vehicle via wireless communication.
In-vehicle terminal device capable of data communication and voice communication
And the power supply voltage from the vehicle's main battery is
In case of a drop, the car replaces the main battery.
Power to the auxiliary battery that supplies power to the
A power supply control circuit for switching the power supply, wherein the power supply control circuit
Means for monitoring the voltage of the main battery,
Monitoring of the voltage of the main battery is performed by the on-board terminal device.
It is performed by interruption of a control unit that performs control, and the control unit
The interruption signal supplies power to the auxiliary battery.
Car mounting terminal you and switches the sheet. 4. A data communication device outside the vehicle through a wireless communication with the vehicle.
In-vehicle terminal device capable of data communication and voice communication
, And the supply power voltage from the main battery of the vehicle
In case of a drop, the car replaces the main battery.
Power to the auxiliary battery that supplies power to the
A power supply control circuit for switching the power supply, wherein the power supply control circuit
Means for monitoring the voltage of the main battery,
The operation is continued by the power supply from the auxiliary battery.
When the main battery voltage is
The main battery
The source vehicle mounting terminal it said switching Rukoto supply. 5. The main input to the AD converter.
The power supply for monitoring from the battery is divided by resistance division.
By supplying the divided power, the operation of the control unit
Monitor main battery voltage higher than working voltage
Vehicle terminal according to claim 1 Symbol mounting, characterized in that a. Wherein said auxiliary back from the front Symbol main battery
Than the set voltage when shifting to the
Settings for returning to the main battery from terry
Vehicle terminal according to claim 5 Symbol mounting features that you set a high voltage. Set for 7. The previous Symbol main battery of monitoring
Set the constant voltage to a voltage higher than the operating voltage of the control unit,
With the operating voltage of the control unit secured, the auxiliary battery
The in- vehicle terminal device according to any one of claims 1 to 6, wherein the power supply is switched to power supply from a vehicle. 8. An in-vehicle vehicle according to claim 1,
Press the emergency call transmission button to activate the emergency call system.
Emergency to automatically make an emergency call to the center in charge of the system
Car mounting terminal characterized that you mounted the reporting system terminal equipment. 9. Emergency containing vehicle terminal equipment of claim 8 Symbol mounting
Notification system terminal device, and the emergency notification system terminal device
Center equipped with a function to receive emergency call transmission signals from
And emergency call system.