JP2011002285A - On-vehicle unit, control method and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress battery consumption, and to improve a possibility of arrival to a destination.SOLUTION: This on-vehicle unit 1 to which a supply voltage is supplied from a battery 24 includes: a battery residual quantity management part 22 for detecting a battery residual quantity (battery voltage) of the battery 24; a plurality of processing parts (display parts 12-RAM21) for executing processing of data for route guide to the destination; and a control part 11 for executing a control mode (MODE B or MODE C) for stopping supply of the supply voltage to some processing part (a display part 12, an operation part 13) of the plurality of processing parts, when the battery voltage detected by the battery residual quantity management part 22 is lower than a prescribed reference residual quantity value (11.5 V or 11.0 V).

Description

  The present invention relates to a vehicle-mounted device, a control method, and a program.

Currently, in-vehicle navigation devices (hereinafter referred to as in-vehicle devices) are widely used as devices for enjoying comfortable driving.

Various types of functional units such as a GPS receiving unit for receiving a GPS signal and a display unit for displaying map data for route guidance are mounted on the vehicle-mounted device. Each of these functional units is operated based on a power supply voltage supplied from the battery.

  Also, when data reception starts, when the battery remaining amount of the battery (hereinafter referred to as the battery remaining amount) is equal to or greater than a predetermined value, by receiving and storing the map update information, the user experience is deteriorated and the burden on the user is reduced. There is also known a technique capable of receiving and storing necessary data from outside without inviting (see, for example, Patent Document 1).

JP 2006-471112 A

  However, when operating each function unit based on the power supply voltage supplied from the battery, the power supply voltage is not supplied to each function unit when the remaining battery level is low. When the power supply voltage is not supplied to each function unit, each function unit becomes inoperable (for example, GPS signal cannot be received, map data cannot be displayed). Then, there is a problem that it becomes impossible to detect the current position of the vehicle and to perform accurate route guidance and to reach the destination.

  An object of the present invention is to reduce battery consumption and improve the possibility of reaching a destination.

In order to solve the above-mentioned problem, the vehicle-mounted device of the invention according to claim 1 is:
An in-vehicle device that is supplied with a power supply voltage from a battery,
A detection unit for detecting a remaining battery level of the battery;
A plurality of processing units for processing data for route guidance to the destination;
When the remaining battery level of the battery detected by the detection unit is less than a predetermined reference remaining level value, a control mode is executed to stop the supply of the power supply voltage to any one of the plurality of processing units. A control unit to
Is provided.

The invention according to claim 2 is the vehicle-mounted device according to claim 1,
The reference remaining amount value is
A first reference remaining amount value indicating a remaining remaining amount level of the battery, and a second reference remaining amount value indicating a remaining amount level lower than the first reference remaining amount value;
The plurality of processing units are:
Including a first processing unit and a second processing unit including any of a display unit, an operation unit, and an audio output unit,
The controller is
When the battery remaining amount of the battery is equal to or greater than the first reference remaining amount value, a control mode for supplying the power supply voltage to the plurality of processing units is executed, and the battery remaining amount of the battery is the first reference remaining amount. When the value is smaller than the quantity value and greater than or equal to the second reference remaining amount value, a control mode for stopping the supply of the power supply voltage to the first processing unit is executed, and the battery remaining amount of the battery is the first remaining amount. When the reference remaining amount is less than 2, the control mode is executed to stop the supply of the power supply voltage to the first processing unit and the second processing unit.

The invention according to claim 3 is the vehicle-mounted device according to claim 1 or 2,
It has an output unit that outputs information,
The controller is
When the first mode information indicating the control mode executed last time is acquired and the acquired first mode information is different from the second mode information indicating the control mode executed this time, the control mode executed last time Control information different from the control mode executed this time is output to the output unit.

The invention according to claim 4 is the vehicle-mounted device according to claim 3,
The controller is
When the control mode for stopping the supply of the power supply voltage to the first processing unit is executed, when the timing for outputting the route information to the destination to the output unit is reached, the first processing is performed for a predetermined time. The power supply voltage is supplied to the unit.

The control method of the invention according to claim 5 is:
A control method for an in-vehicle device in which a power supply voltage is supplied from a battery,
A plurality of processing units that execute data processing for route guidance to a destination when the remaining battery level of the battery detected by the detection unit that detects the remaining battery level of the battery is less than a predetermined reference remaining level value A control step of executing a control mode in which the supply of the power supply voltage to any of the processing units is stopped.

The program of the invention described in claim 6 is:
On-board computer to which power supply voltage is supplied from battery
A detection unit for detecting a remaining battery level of the battery;
A plurality of processing units that execute processing of data for route guidance to the destination,
When the remaining battery level of the battery detected by the detection unit is less than a predetermined reference remaining level value, a control mode is executed to stop the supply of the power supply voltage to any one of the plurality of processing units. Control unit,
To function as.

  According to the present invention, battery consumption can be suppressed and the possibility of reaching the destination can be improved.

It is a figure which shows the internal structure of the onboard equipment which concerns on this invention. It is a flowchart which shows the flow of a battery voltage monitoring process. It is a flowchart which shows the flow of a MODE A process. It is a flowchart which shows the flow of a MODE B process. It is a flowchart which shows the flow of a MODEC process. It is a flowchart which shows the flow of an enlarged view display process.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. However, the scope of the invention is not limited to the illustrated examples.

Embodiments according to the present invention will be described with reference to FIGS. First, with reference to FIG. 1, the onboard equipment 1 which concerns on this invention is demonstrated. The vehicle-mounted device 1 is mounted on the vehicle 100.
The in-vehicle device 1 shown in FIG. 1 includes a control unit 11, a first processing unit, a display unit 12 as an output unit, an operation unit 13 as a second processing unit, a voice input unit 14, and an output unit. Audio output unit 15, beacon receiving unit 16, broadcast receiving unit 17, GPS receiving unit 18, gyro unit 19, ROM (Read Only Memory) 20, RAM (Random Access Memory) 21, and detection unit The battery remaining amount management unit 22 and the power supply circuit unit 23 are configured. The battery 24 is described as a battery mounted on the vehicle 100, but may be a battery mounted on the vehicle-mounted device 1.

  The control unit 11 includes a CPU (Central Processing Unit), and centrally controls each unit of the vehicle-mounted device 1. The control unit 11 expands a program designated from the system program and various application programs stored in the ROM 20 in the RAM 21 and executes various processes in cooperation with the program expanded in the RAM 21.

  Further, the control unit 11 cooperates with a battery voltage monitoring program to be described later, so that the battery remaining amount (battery voltage) detected by the battery remaining amount management unit 22 is a predetermined reference remaining amount value (11.5 V or 11. 0V), the processing unit (for example, the display unit 12, the operation unit) out of a plurality of processing units (display unit 12 to RAM 21) that executes processing of data for route guidance to the destination The control mode (operation mode: MODE B or MODE C) for stopping the supply of the power supply voltage to 13) is executed.

  The display unit 12 is configured by a color liquid crystal display or the like, and displays display information for navigation such as a map screen, an icon, and a guide map on the display screen according to an instruction from the control unit 11. Further, a backlight (not shown) is arranged on the display unit 12 so that the screen display can be easily seen.

  The operation unit 13 includes a key switch (hard switch) including various keys associated with various functions such as an arrow key for instructing a direction, a set key, a numeric key, and other navigation functions. Is output to the control unit 11. The operation unit 13 includes a touch panel provided so as to cover the screen of the display unit 12, and detects and detects coordinates instructed by a coordinate reading principle such as an electromagnetic induction type, a magnetostriction type, and a pressure sensitive type. The coordinates are output to the control unit 11 as a position signal.

  The audio input unit 14 includes, for example, a microphone, an AF (Audio Frequency) amplifier, a sampler, an A / D (Analog-to-Digital) converter, and the like. The audio input unit 14 amplifies an audio signal representing the sound collected by the microphone, samples and performs A / D conversion, thereby generating digital audio data representing the sound. Then, the audio data is output to the control unit 11. Then, the control unit 11 performs a process of performing voice recognition on the voice data, and the processed voice data is output to the voice output unit 15. A known technique can be adopted as appropriate for the voice recognition method.

The audio output unit 15 includes, for example, a D / A (Digital-to-Analog) converter, an AF amplifier, a speaker, and the like. The audio data supplied from the control unit 11 is D / A converted and amplified, and the audio is reproduced from the speaker based on the obtained analog signal.

  The beacon receiving unit 16 receives so-called VICS information related to traffic congestion and traffic regulation transmitted by optical beacons and radio wave beacons via the ANT 1, and outputs the received VICS information to the control unit 11.

The broadcast receiving unit 17 is a circuit unit for receiving a TV broadcast and generating and outputting a video signal and an audio signal, and includes a tuner unit, a demodulation unit, a video decoding unit, an audio decoding unit, and the like. . Specifically, the broadcast receiving unit 17 receives a TV broadcast having a frequency corresponding to the channel specified by the user by tuning the antenna ANT2. Then, the received TV broadcast is demodulated by the demodulation unit, and the video data and the audio data are extracted and output to the video decoding unit and the audio decoding unit. The video decoding unit and the audio decoding unit decode the video data and audio data demodulated by the demodulation unit to generate a video signal and an audio signal, respectively, and output the generated video signal and audio signal to the control unit 11.
The broadcast receiving unit 17 may receive FM broadcasts. In this case, the broadcast receiving unit 17 processes the VICS FM traffic information (information related to traffic congestion and traffic regulation) included in the received FM broadcast and outputs the processed VICS FM traffic information to the control unit 11.

  The GPS receiving unit 18 is a circuit unit that measures the current position (for example, latitude and longitude) of the vehicle, receives GPS signals transmitted from a plurality of GPS satellites via the antenna ANT3, and based on the GPS signals. The current position measured in this way is output to the control unit 11. In addition, a well-known technique can be employ | adopted suitably for the method of positioning a present position.

  The gyro unit 19 is a sensor that detects an angle (left and right, up and down) and a traveling speed. Specifically, the gyro unit 19 detects the right or left turn of the vehicle (left and right of the vehicle) and the height of the road (up and down of the vehicle) as an angle, and outputs the detected angle to the control unit 11.

  The vehicle speed pulse measurement unit 19A takes in a vehicle speed pulse (information such as 4 pulses for one rotation of the tire) from the vehicle, and measures how many times the tire has rotated per hour from the acquired vehicle speed pulse. Based on the measured rotational speed, the travel speed is calculated (detected), and the calculated travel speed is output to the control unit 11.

  The ROM 20 stores a control program executed by the control unit 11, parameters and data necessary for executing the control program, and the like. Specifically, the ROM 20 stores a map DB 20A. The map DB 20A is a database that stores map information including road information. Road information includes nodes, links, names of roads, types of roads (highways, national roads, prefectural roads, general roads, arterial roads, toll roads, etc.), road widths, IC (interchange) names, and maps Information such as the coordinate information (latitude and longitude), the name of the SA (service area), and coordinate information on the map.

  The RAM 21 serves as a temporary storage area for various programs read from the ROM 20, input, or output data and parameters in various processes controlled and executed by the control unit 11.

The RAM 21 stores operation mode information. The operation mode information is information indicating the control mode (operation mode) of the vehicle-mounted device 1 and includes MODEs A, B, and C.

MODE A indicates an operation mode in which all the units of the in-vehicle device 1 (display unit 12 to RAM 21 that executes data processing for route guidance to the destination) can operate. When MODE A is executed, a power supply voltage is supplied from the control unit 11 to each unit, and each unit becomes operable. MODE A is executed when the battery voltage is 11.5 V (first reference remaining amount value) or more.

MODE B indicates an operation mode in which the display unit 12 cannot operate and each unit (operation unit 13 to RAM 21) other than the display unit 12 can operate. During execution of MODE B, the supply of power supply voltage to the display unit 12 is stopped by the control unit 11, and the display unit 12 becomes inoperable (not displayed). At this time, the power supply voltage is supplied to each part other than the display part. MODE B is executed when the battery voltage is lower (lower) than 11.5V and is 11.0V (second reference remaining amount) or more (that is, 11.0V to 11.5V). Is done. Further, when MODE B is executed, if an enlarged map display process described later is executed, a power supply voltage is supplied to the display unit 12 for a predetermined time (for example, about 5 seconds), and the display unit 12 is operable (displayable). )

  MODE C indicates an operation mode in which the display unit 12 and the operation unit 13 are inoperable, and each unit (speech input unit 14 to RAM 21) other than the display unit 12 and the operation unit 13 is operable. During the execution of MODE C, the supply of power supply voltage to the display unit 12 and the operation unit 13 is stopped by the control unit 11, the display unit 12 is not displayed, and the operation unit 13 cannot be operated. At this time, the power supply voltage is supplied to each unit other than the display unit 12 and the operation unit 13. MODE C is executed when the battery voltage is lower (lower) than 11.0 V (second reference remaining amount value).

  The battery remaining amount management unit 22 includes, for example, a voltage detection circuit, and detects and manages the terminal voltage (battery voltage) of the battery 24 as the battery remaining amount. Then, the battery voltage is output to the control unit 11.

  The power supply circuit unit 23 is a power supply circuit that supplies a power supply voltage to the control unit 11 using the battery 24 as a power source, and has a switching function for turning on / off (turning on and off) the supplied power supply voltage. When the power supply voltage is supplied from the power supply circuit unit 23 to the control unit 11, the control unit 11 supplies the power supply voltage to each unit of the vehicle-mounted device.

  Next, with reference to FIG. 2, the battery voltage monitoring process performed with the onboard equipment 1 is demonstrated. The battery voltage monitoring process monitors the battery voltage, and when the battery voltage is lower than the reference remaining amount value (11.5 V or 11.0 V), any of the processing units (display unit 12, operation unit 13) of the vehicle-mounted device 1. ) To execute the control mode (MODE B or MODE C) for stopping the supply of the power supply voltage to ().

  For example, in the vehicle-mounted device 1, a battery voltage monitoring program read from the ROM 20 and appropriately expanded in the RAM 21 triggered by the input of the execution instruction of the battery voltage monitoring process via the operation unit 13, and the CPU The battery voltage monitoring process is executed in cooperation.

  Operation mode information (first mode information: information indicating one of MODEs A to C) indicating an operation mode (operation mode executed last time) executed in the previous battery voltage monitoring process is previously stored in the RAM 21. It shall be. Hereinafter, it is assumed that the operation mode information is read / written (read / written) from the RAM 21.

  First, it is determined how many volts the battery voltage is (step S11). Specifically, the battery voltage output from the battery remaining amount management unit 22 is detected by the control unit 11, and the determination of this step is performed based on the detected battery voltage.

  If it is determined in step S11 that the battery voltage is 11.5 V or higher (step S11; 11.5 V or higher), MODE A processing is executed (step S12). In step S11, when it is determined that the battery voltage is 11.0 to 11.5V (step S11; 11.0V to 11.5V), the MODE B process is executed (step S13). If it is determined in step S11 that the battery voltage is less than 11.0 V (less than 11.0 V) (step S11; less than 11.0 V), MODE C processing is executed (step S14).

  In step S15, when it is determined that it is not the display timing of the enlarged view (step S15; NO), the process proceeds to step S11. In step S15, when it is determined that it is the display timing of the enlarged view (step S15; YES), the enlarged view display process is executed (step S16).

  After execution of step S16, it is determined whether or not to end the battery voltage monitoring process (step S17). Specifically, the determination of this step is performed based on whether or not an instruction input for ending the battery voltage monitoring process is received from the user via the operation unit 13. If it is determined in step S17 that the process will not end (step S17; NO), the process proceeds to step S11. If it is determined in step S17 that the process is to be terminated (step S17; YES), the battery voltage monitoring process is terminated. When the battery voltage monitoring process is completed, the executed operation mode information is stored in the ROM 20.

  Next, the MODE A process executed in step S12 of the battery voltage monitoring process will be described with reference to FIG.

  First, it is determined what the previous MODE was (step S21). Specifically, the previously executed operation mode information (first mode information) stored in the ROM 20 is read and acquired. Then, this step is executed based on the acquired operation mode information. If it is determined in step S21 that the previous MODE is A (step S21; MODE A), the operation mode information (first mode information) executed last time and the operation mode information (first mode information) indicating the operation mode executed this time. 2 mode information), the process proceeds to step S23 to be described later.

  In step S21, when it is determined that the previous MODE is B or C (step S21; MODE BorC), it is determined that the operation mode information executed last time is different from the operation mode information executed this time. The function restriction is released because it has been restored. The screen display is turned ON. The operation unit can be operated. ”(The control information that is different between the operation mode executed last time and the operation mode executed this time) is displayed on the display unit 12. And output from the audio output unit 15 (step S22).

  After execution of step S22, the screen display of the display unit 12 is set to ON (backlight ON), and the operation unit 13 is set to be operable (step S23). Specifically, the control unit 11 supplies a power supply voltage to each unit (display unit 12 to RAM 21) of the vehicle-mounted device 1, and sets each unit of the vehicle-mounted device 1 to be operable. After execution of step S23, the MODE A process is terminated, and the process proceeds to step S15 of the battery monitoring process.

  Next, the MODE B process executed in step S13 of the battery voltage monitoring process will be described with reference to FIG.

  Step S31 is the same as step S21 of the MODE A process. If it is determined in step S31 that the previous MODE is B (step S31; MODE B), it is determined that the operation mode information executed last time matches the operation mode information executed this time, and the process proceeds to step S33 described later. Is done. In step S31, when it is determined that the previous MODE is A (step S31; MODE A), it is determined that the operation mode information executed last time and the operation mode information executed this time are different, and “because the battery voltage has decreased. “The function is restricted. The screen display is turned off.” Is displayed on the display unit 12 and is also output from the audio output unit 15 (step S32).

  In step S31, when it is determined that the previous MODE is C (step S31; MODE C), it is determined that the operation mode information executed last time is different from the operation mode information executed this time. The function restriction is released. The operation unit 13 can be operated. ”Is output from the audio output unit 15 (step S33).

  After execution of step S32 or S33, the screen display of the display unit 12 is set to OFF, and the operation unit 13 is set to be operable (step S34). Specifically, the power supply voltage to the display unit 12 is stopped by the control unit 11, and the power supply voltage is supplied to each unit (operation unit 13 to RAM 21) other than the display unit 12. At this time, since the display unit 12 is not displayed, the user cannot perform an operation via the touch panel (however, the hard switch of the operation unit 13 is effective at this time). In this case, reception of voice input is started by the voice input unit 14, and desired information is input to the voice input unit 14 by the user. Then, a voice recognition process is performed on the input voice, and an answer to the input voice is output by the voice output unit 15. After execution of step S33, the MODE B process is terminated and the process proceeds to step S15 of the battery monitoring process.

  Next, the MODEC process executed in step S14 of the battery voltage monitoring process will be described with reference to FIG.

  Step S41 is the same as step S21 of the MODE A process. If it is determined in step S41 that the previous MODE is C (step S41; MODE C), it is determined that the operation mode information executed last time matches the operation mode information executed this time, and the process proceeds to step S43 described later. Is done. In step S41, when it is determined that the previous MODE is B or A (step S41; MODE BorA), it is determined that the operation mode information executed last time is different from the operation mode information executed this time. “The function is limited because it has been reduced. The screen display is turned off. The operation unit cannot be used.” Is displayed on the display unit 12 and is also output from the audio output unit 15 (step S42).

  After execution of step S42, the screen display of the display unit 12 is set to OFF, and the operation unit 13 is set to prohibit operation (step S43). Specifically, the supply of power supply voltage to the display unit 12 and the operation unit 13 is stopped by the control unit 11, and the power supply voltage is supplied to each unit (speech input unit 14 to RAM 21) other than the display unit 12 and the operation unit 13. Is done. At this time, since the display unit 12 and the operation unit 13 cannot be operated, the user cannot perform an operation via the hard switch or the touch panel of the operation unit 13. In this case, reception of voice input is started by the voice input unit 14, and desired information is input to the voice input unit 14 by the user. Then, a voice recognition process is performed on the input voice, and an answer to the input voice is output by the voice output unit 15. After execution of step S43, the MODE C process is terminated and the process proceeds to step S15 of the battery monitoring process.

  Next, with reference to FIG. 6, the enlarged view display process executed in step S16 of the battery voltage monitoring process will be described.

  First, it is determined what MODE is (step S51). Specifically, the determination in this step is performed based on the battery voltage determined in step S11 of the battery voltage monitoring process. If it is determined in step S51 that MODE is A (step S51; MODE A), the process proceeds to step S53 described later. If it is determined in step S51 that MODE is C (step S51; MODE C), the enlarged view display process is terminated, and the process proceeds to step S17 of the battery monitoring process.

  If it is determined in step S51 that MODE is B (step S51; MODE B), the screen display is set to ON (step S52). After execution of step S52, an enlarged view is displayed on the display unit 12 (step S53). For example, an enlarged view such as an intersection at the time of route guidance is displayed on the display unit 12.

  After execution of step S53, it is determined what MODE is (step S54). In this step, processing similar to that in step S51 is executed. If it is determined in step S54 that MODE is A or C (step S54; MODE A or MODE C), the enlarged view display process is terminated, and the process proceeds to step S17 of the battery monitoring process. If it is determined in step S54 that MODE is B (step S54; MODE B), the screen display is set to OFF after a predetermined time (for example, 5 seconds) after the screen display is turned ON. (Step S55). That is, the power supply voltage is supplied to the display unit 12 for 5 seconds. After execution of step S55, the enlarged view display process is terminated, and the process proceeds to step S17 of the battery monitoring process.

  As described above, according to the present embodiment, when the remaining amount (battery voltage) of the battery 24 is smaller than the predetermined reference remaining amount value (11.5 V or 11.0 V), any of the processing units ( The control mode (MODE B or MODE C) for stopping the supply of the power supply voltage to the display unit 12, the operation unit 13 and the like is executed. Thereby, since the power supply voltage supplied to one of the processing units (display unit 12 or operation unit 13) is limited, the power consumption of the battery 24 can be suppressed, and the possibility of reaching the destination is improved. be able to.

  When the battery voltage is 11.5 V or higher, a control mode (MODE A) for supplying a power supply voltage to each unit (a plurality of processing units: display unit 12 to RAM 21) of the vehicle-mounted device 1 is executed. Further, when the battery voltage is lower (lower) than 11.5 V and higher than 11.0 V, the control mode (MODE B) for stopping the supply of the power supply voltage to the display unit 12 is executed. When the battery voltage is lower (lower) than 11.0 V, a control mode (MODE C) for stopping the supply of power supply voltage to the display unit 12 and the operation unit 13 is executed. Thereby, since the power supply voltage is controlled based on the battery voltage, the power consumption of the battery can be suppressed.

  Also, different control information between the control mode executed last time and the control mode executed this time is output from the output unit (display unit 12 or audio output unit 15). For example, if the control mode executed last time is MODE B or MODE C and the control mode executed this time is MODE A, the function control is released because the battery voltage is restored. “The operation unit can be operated.” Is displayed on the display unit 12 and output from the audio output unit 15. Thereby, the user can grasp different control information between the control mode executed last time and the control mode executed this time.

  Further, when it is time to display the route information to the destination on the display unit 12 during the execution of the MODE B process, the power supply voltage is supplied to the display unit 12 for a predetermined time (5 seconds). Thus, the user can grasp the route information to the destination by referring to the route information to the destination for a predetermined time.

  In addition, the description in the said embodiment is an example of the onboard equipment which concerns on this invention, and is not limited to this.

  For example, in the above embodiment, the power supply voltage is not supplied to at least one of the display unit 12 and the operation unit 13 (the display unit 12 in the MODE B process and the display unit 12 and the operation unit 13 in the MODE C process). However, it is not limited to this. For example, instead of the display unit 12 or the operation unit 13, the power supply voltage may not be supplied to other units (any one of the voice input unit 14 to the RAM 21) that perform route guidance to the destination. .

In step S11 of the battery voltage monitoring process, the reference remaining amount value (11.5V, 11.0V, etc.) for executing each mode (MODE A to MODE C) may be an arbitrary value. Also, the mode division is not limited to three modes (MODE A to MODE C), and any number of modes may be used.

In step S55 of the enlarged view display process, the screen display time (5 seconds) may be an arbitrary time.

  In addition, the detailed structure and detailed operation of the vehicle-mounted device 1 in the present embodiment can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Onboard equipment 11 Control part 12 Display part 13 Operation part 14 Audio | voice input part 15 Audio | voice output part 16 Beacon receiving part 17 Broadcast receiving part 18 Receiving part 19 Gyro part 20 ROM
21 RAM
22 Battery level management unit 23 Power supply circuit unit 24 Battery

Claims (6)

An in-vehicle device that is supplied with a power supply voltage from a battery,
A detection unit for detecting a remaining battery level of the battery;
A plurality of processing units for processing data for route guidance to the destination;
When the remaining battery level of the battery detected by the detection unit is less than a predetermined reference remaining level value, a control mode is executed to stop the supply of the power supply voltage to any one of the plurality of processing units. A control unit to
In-vehicle device equipped with. The reference remaining amount value is
A first reference remaining amount value indicating a remaining remaining amount level of the battery, and a second reference remaining amount value indicating a remaining amount level lower than the first reference remaining amount value;
The plurality of processing units are:
Including a first processing unit and a second processing unit including any of a display unit, an operation unit, and an audio output unit;
The controller is
When the battery remaining amount of the battery is equal to or greater than the first reference remaining amount value, a control mode for supplying the power supply voltage to the plurality of processing units is executed, and the battery remaining amount of the battery is the first reference remaining amount. When the value is smaller than the quantity value and greater than or equal to the second reference remaining amount value, a control mode for stopping the supply of the power supply voltage to the first processing unit is executed, and the battery remaining amount of the battery is the first remaining amount. 2. The vehicle-mounted device according to claim 1, wherein a control mode for stopping supply of the power supply voltage to the first processing unit and the second processing unit is executed when the reference remaining amount is less than 2. It has an output unit that outputs information,
The controller is
When the first mode information indicating the control mode executed last time is acquired and the acquired first mode information is different from the second mode information indicating the control mode executed this time, the control mode executed last time The on-vehicle device according to claim 1, wherein control information different from the control mode executed this time is output to the output unit. The controller is
When the control mode for stopping the supply of the power supply voltage to the first processing unit is executed, when the timing for outputting the route information to the destination to the output unit is reached, the first processing is performed for a predetermined time. The in-vehicle device according to claim 3, wherein the power supply voltage is supplied to a unit. A control method for an in-vehicle device in which a power supply voltage is supplied from a battery,
A plurality of processing units that execute data processing for route guidance to a destination when the remaining battery level of the battery detected by the detection unit that detects the remaining battery level of the battery is less than a predetermined reference remaining level value A control method including a control step of executing a control mode for stopping supply of the power supply voltage to any of the processing units. On-board computer to which power supply voltage is supplied from battery
A detection unit for detecting a remaining battery level of the battery;
A plurality of processing units that execute processing of data for route guidance to the destination,
When the remaining battery level of the battery detected by the detection unit is less than a predetermined reference remaining level value, a control mode is executed to stop the supply of the power supply voltage to any one of the plurality of processing units. Control unit,
Program to function as.

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