WO2016013155A1

WO2016013155A1 - Device for vehicle and state transition program product

Info

Publication number: WO2016013155A1
Application number: PCT/JP2015/003196
Authority: WO
Inventors: 松田　直樹
Original assignee: 株式会社デンソー
Priority date: 2014-07-22
Filing date: 2015-06-25
Publication date: 2016-01-28
Also published as: JP2016022841A

Abstract

This device (1) for a vehicle is provided with: a supply voltage detection unit (3) for detecting a supply voltage that is supplied from a vehicle battery (9) to the device; and a control unit (2) that performs reset processing to reset the device when the detected supply voltage becomes lower than a first predetermined voltage level and that operates under a normal operation state in which a plurality of functions can be provided when the supply voltage is greater than or equal to a second predetermined voltage level which is greater than the first predetermined voltage level. The control unit can transition between the normal operation state and a function provision standby state in which some of the plurality of functions are restricted. When operating under the normal operation state, the control unit transitions from the normal operation state to the function provision standby state when the supply voltage becomes lower than the second predetermined voltage level. When operating under the function provision standby state, the control unit transitions from the function provision standby state to the normal operation state when the supply voltage increases to and exceeds a third predetermined voltage level.

Description

Vehicle device and state transition program product

Cross-reference of related applications

This application is based on Japanese Application No. 2014-148760 filed on July 22, 2014, the contents of which are incorporated herein by reference.

The present disclosure relates to a vehicle apparatus and a state transition program product that operate using a supply voltage supplied from a vehicle battery as an operating voltage.

2. Description of the Related Art Conventionally, a vehicle apparatus that operates with a supply voltage supplied from a vehicle battery as an operating voltage and provides various functions such as video display and audio output to a user is provided. Conventionally, in this type of vehicle device, for example, when cranking or the like in a state where the vehicle battery is deteriorated occurs and the supply voltage temporarily falls below a predetermined voltage level, it is reset (restarted). It was. However, when the vehicular device is reset, various functions cannot be provided to the user in the period from the start to the end of the reset procedure. As a configuration in which the electronic device is reset, for example, there is a technique disclosed in Patent Document 1.

However, even the technique disclosed in Patent Document 1 cannot solve the problem that various functions cannot be provided to the user in the period from the start to the end of the reset procedure.

JP 62-46317 A

The present disclosure has been made in view of the above-described circumstances. The purpose of the present disclosure is to provide various functions to the user even when the supply voltage supplied from the vehicle battery temporarily drops below a predetermined voltage level. The object is to provide a vehicle device and a state transition program product that can be provided promptly.

The vehicle apparatus according to an aspect of the present disclosure includes a supply voltage detection unit and a control unit. A supply voltage detection part detects the supply voltage currently supplied to the apparatus from the vehicle battery. The control unit resets the device by performing a reset process when the supply voltage detected by the supply voltage detection unit falls below a first predetermined voltage level, and the supply voltage is lower than the first predetermined voltage level. It operates in a normal operating state capable of providing a plurality of functions when above a high second predetermined voltage level. The control unit is capable of transitioning between a normal operation state and a function providing standby state that restricts a part of the plurality of functions, and the supply voltage is a second predetermined voltage when operating in the normal operation state. When the level drops below the level, the normal operation state transitions to the function providing standby state. Then, when the supply voltage increases until it exceeds the third predetermined voltage level while operating in the function providing standby state, the control unit transitions from the function providing standby state to the normal operation state.

That is, a second predetermined voltage level higher than the first predetermined voltage level for performing the reset process is set, and the reset process is performed when the supply voltage supplied from the vehicle battery drops below the second predetermined voltage level. Without transitioning from the normal operation state to the function providing standby state, it waits for the supply voltage to recover. Thereafter, when the supply voltage recovers and increases until it exceeds the third predetermined voltage level, the function providing standby state is changed (returned) to the normal operation state, and a plurality of functions can be provided. By thus waiting for the recovery of the supply voltage without performing the reset process, even when the supply voltage temporarily drops below the second predetermined voltage level, the supply voltage is recovered and the first When the voltage level increases to exceed a predetermined voltage level of 3, various functions can be promptly provided to the user.

A state transition program product according to another aspect of the present disclosure is stored in a computer-readable persistent and tangible storage medium, and the supply voltage supplied to the device from the vehicle battery is below a first predetermined voltage level. In a normal operation state in which the device is reset by performing a reset process when the voltage drops, and a plurality of functions can be provided when the supply voltage is equal to or higher than a second predetermined voltage level higher than the first predetermined voltage level. When the operating control unit monitors the supply voltage when operating in the normal operation state, and determines that the supply voltage has dropped below the second predetermined voltage level, one of a plurality of functions from the normal operation state is obtained. The function is switched to the function providing standby state, and the supply voltage is monitored when operating in the function providing standby state, and the supply voltage is the third predetermined voltage. If it determined to have increased to more than the bell, including instructions to be performed from the function providing standby computer for shifting to the normal operation state.

According to the above state transition program product, various functions can be promptly provided to the user even when the supply voltage supplied from the vehicle battery temporarily drops below a predetermined voltage level.

The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings. The drawing
FIG. 1 is a functional block diagram of a vehicle device according to an embodiment of the present disclosure. FIG. 2 is a flowchart of processing performed by the control unit of the vehicle device according to the embodiment of the present disclosure. FIG. 3 is a diagram illustrating state transitions. FIG. 4 is a diagram showing an example of the transition of the supply voltage from the vehicle battery. FIG. 5 is a diagram showing another example of the transition of the supply voltage from the vehicle battery.

Hereinafter, an embodiment in which the present disclosure is applied to an in-vehicle display device will be described with reference to the drawings. The in-vehicle display device 1 includes a control unit 2, a supply voltage detection unit 3, a display control unit 4, an audio output control unit 5, a communication control unit 6, a volatile memory 7 (volatile storage unit), and a nonvolatile memory. And a non-volatile memory 8 (nonvolatile storage unit).

The control unit 2 is mainly composed of a microcomputer having a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control unit 2 performs various processes when the CPU executes a control program (including a state transition program) stored in the ROM. The supply voltage detection unit 3 detects the supply voltage Vs supplied from the vehicle battery 9 to the in-vehicle display device 1 by inputting the output voltage (for example, 12 volts) of the vehicle battery 9 via the power line 13. The detection result is output to the control unit 2. The output voltage of the vehicle battery 9 is also supplied to the starter motor for starting the engine. When starting the engine, most of the output voltage of the vehicle battery 9 is consumed by the starter motor, so that the supply voltage supplied from the vehicle battery 9 to the in-vehicle display device 1 temporarily decreases.

The display control unit 4 starts the function of display control when the function on command is input from the control unit 2, and stops the function of display control when the function off command is input from the control unit 2. The display control unit 4 controls the screen display of a display (not shown) by inputting a display control command from the control unit 2 while executing the display control function. When the function output command is input from the control unit 2, the sound output control unit 5 starts the function of the sound output control. When the function output command is input from the control unit 2, the sound output control unit 5 stops the function of the sound output control. The sound output control unit 5 controls sound output from a speaker (not shown) by inputting a sound output control command from the control unit 2 while executing the function of sound output control.

The communication control unit 6 includes a CAN (registered trademark) (Controller Area Network) communication control unit 6a, a USB (Universal Serial Bus) communication control unit 6b, and a Bluetooth (registered trademark) (BT) communication control unit 6c. Each communication control unit 6a to 6c starts a communication control function when a function on command is input from the control unit 2, and stops a communication control function when a function off command is input from the control unit 2. The CAN communication control unit 6a has a communication interface function with various ECUs (Electronic Control Unit) 10 mounted on the vehicle, and inputs a communication control command from the control unit 2 while executing the communication control function. The data communication by CAN with various ECUs 10 is controlled. The USB communication control unit 6b has a communication interface function with a USB compatible device 11 (for example, a terminal having a USB port), and inputs a communication control command from the control unit 2 while executing the communication control function. Controls USB data communication with the USB compatible device 11. The BT communication control unit 6c has a communication interface function with the BT compatible device 12 (for example, a terminal having a BT module), and receives a communication control command from the control unit 2 while executing the communication control function. BT communication with the BT compatible device 12 is controlled.

The volatile memory 7 is a memory in which data is lost when power is not supplied. The controller 2 outputs a write command to the volatile memory 7 to write data to the volatile memory 7 and outputs a read command to the volatile memory 7 to read data from the volatile memory 7. . The nonvolatile memory 8 is a memory that does not lose data (holds data) even when power is not supplied. The control unit 2 outputs a write command to the non-volatile memory 8 to write data to the non-volatile memory 8 and outputs a read command to the non-volatile memory 8 to read data from the non-volatile memory 8. .

Control unit 2 transitions between a normal operation state, a function providing standby state, and a power-off state. In the normal operation state, the control unit 2 can provide its own functions, the functions of the volatile memory 7 and the nonvolatile memory 8 (ensure operation), and the functions of the display control unit 4 and the audio output control unit 5. And the function of the communication control unit 6 can be provided. On the other hand, in the function providing standby state, the control unit 2 restricts (stops) the function of the display control unit 4, the function of the audio output control unit 5, and the function of the communication control unit 6. Only the functions of the memory 7 and the nonvolatile memory 8 can be provided. That is, the control unit 2 does not provide the function of the display control unit 4, the function of the audio output control unit 5, and the function of the communication control unit 6 (does not guarantee operation) in the function providing standby state. When the control unit 2 determines that the supply voltage has decreased to a level lower than the first predetermined voltage level V1 (for example, 4.5 volts) in the power-off state, the control unit 2 resets the in-vehicle display device 1 by performing a reset process. .

Next, the operation of the above configuration will be described with reference to FIGS. The control unit 2 sets the second predetermined voltage level V2 to be higher than the first predetermined voltage level V1, which is a reference for performing the reset process, and sets the third predetermined voltage level V3 to the second predetermined voltage level. It is set higher than level V2.

When the control unit 2 is operating in the normal operation state, the control unit 2 performs a supply voltage monitoring process in connection with the present disclosure. When the control unit 2 starts the supply voltage monitoring process, is the supply voltage supplied from the vehicle battery 9 via the power line 13 to the in-vehicle display device 1 less than a second predetermined voltage level (for example, 8 volts)? It is determined whether or not (S1, first procedure). Here, when starting the engine, most of the output voltage of the vehicle battery 9 is consumed by the starter motor, so that the supply voltage temporarily decreases. When the control unit 2 determines that, for example, cranking or the like has occurred and the supply voltage has decreased to less than the second predetermined voltage level at time T1 as shown in FIG. 4 (S1: YES), the control unit 2 starts from the normal operation state. Transition to the function providing standby state (S2, second procedure). At this time, the control unit 2 outputs a function off command to the display control unit 4, the audio output control unit 5, and the communication control units 6a to 6c, and stops the display control function, the audio output control function, and the communication control function. Let me limit the functions. That is, in this state, various functions such as video display, audio output, and communication cannot be provided to the user.

The control unit 2 starts timing immediately after transition from the normal operation state to the function providing standby state (S3), and whether or not the supply voltage has exceeded a third predetermined voltage level (for example, 8.3 volts) thereafter. (S4, third procedure), and it is determined whether or not the elapsed time Te from the start of the time has reached a predetermined time Tr (for example, 10 seconds) (S5). Here, when the output voltage of the vehicle battery 9 is stabilized and the supply voltage is stabilized, the temporarily reduced supply voltage is recovered.

As shown in FIG. 4, the control unit 2 increases until the supply voltage recovers and exceeds the third predetermined voltage level at time T2 before the elapsed time from the start of timing reaches the predetermined time. Is determined (S4: YES), the time measurement is terminated (S6), and the function providing standby state is changed (returned) to the normal operation state (S7, fourth procedure). At this time, the control unit 2 outputs a function ON command to the display control unit 4, the audio output control unit 5, and the communication control units 6a to 6c, and resumes the display control function, the audio output control function, and the communication control function. Cancel the restriction of the function. That is, in this state, the display control unit 4, the audio output control unit 5, and the communication control units 6a to 6c each perform a restart process (initialization process), thereby allowing various functions such as video display, audio output, and communication to be performed by the user. Can be provided. Then, the control unit 2 returns to Step S1 and repeats Step S1 and subsequent steps.

On the other hand, as shown in FIG. 5, after the supply voltage drops below the second predetermined voltage level at time T1, the control unit 2 does not recover and does not exceed the third predetermined voltage level. If it is determined that the elapsed time Te since the start of the time measurement has reached the predetermined time Tr (S5: YES), the time measurement is finished (S8), and the data that needs to be saved is stored in the volatile memory 7. It is determined whether or not (S9). In FIG. 5, a time T3 indicates a time when a predetermined time Tr has elapsed from the time T1. If the control unit 2 determines that the data that needs to be saved is stored in the volatile memory 7 (S9: YES), the control unit 2 outputs a read command to the volatile memory 7 and volatilizes the data that needs to be saved. Read from the memory 7 (S10). The control unit 2 outputs a write command to the nonvolatile memory 8, writes the data read from the volatile memory 7 (data that needs to be saved) into the nonvolatile memory 8 and saves it (S11). Then, the control unit 2 transitions from the function providing standby state to the power off state (S12). If the control unit 2 determines that the data that needs to be saved is not stored in the volatile memory 7 (S9: NO), the control unit 2 quickly transitions from the function providing standby state to the power-off state (S12).

As described above, according to the present embodiment, the following effects can be obtained.

In the in-vehicle display device 1, when a second predetermined voltage level higher than the first predetermined voltage level for performing the reset process is set, and the supply voltage from the vehicle battery 9 decreases to less than the second predetermined voltage level, the reset process is performed. Without performing the above, the transition from the normal operation state to the function providing standby state is made to wait for the recovery of the supply voltage. After that, when the supply voltage recovers and increases until it exceeds the third predetermined voltage level, the function provision standby state is changed (returned) to the normal operation state. Even if the supply voltage drops below the second predetermined voltage level by waiting for the recovery of the supply voltage while continuously guaranteeing the operation of the control unit 2 without performing the reset process, When the supply voltage recovers and increases until it exceeds the third predetermined voltage level, various functions can be promptly provided to the user.

Further, the third predetermined voltage level that is a reference for transition from the function providing standby state to the normal operation state is set higher than the second predetermined voltage level that is a reference for transition from the normal operation state to the function providing standby state. As a result, frequent transitions between the normal operation state and the function providing standby state can be prevented.

Also, after the transition from the normal operation state to the function providing standby state, when the elapsed time in the function providing standby state reaches a predetermined time, the function providing standby state is changed to the power off state. Thereby, the period during which the function is limited can be limited, and it is possible to appropriately cope with the case where the supply voltage does not recover.

The present disclosure is not limited to the above-described embodiment, and can be modified or expanded as follows.

The vehicle device is not limited to the in-vehicle display device 1, and any device may be used as long as it operates using the supply voltage supplied from the vehicle battery 9 as an operating voltage and provides various functions to the user. May be.

An example of a configuration that simultaneously restricts the display control function, the audio output control function, and the communication control function when transitioning from the normal operation state to the function providing standby state is illustrated. However, at least one of these functions is restricted. It may be configured. Further, a configuration in which a plurality of these functions are sequentially limited step by step may be employed.

This disclosure may be further provided as a state transition program product. Specifically, in the state transition program product stored in the computer-readable persistent and tangible storage medium, when the supply voltage supplied from the vehicle battery 9 to the device drops below a first predetermined voltage level The device is reset by performing a reset process, and is operated in a normal operation state capable of providing a plurality of functions when the supply voltage is equal to or higher than a second predetermined voltage level higher than the first predetermined voltage level. If the unit 2 monitors the supply voltage when operating in the normal operation state and determines that the supply voltage has dropped below the second predetermined voltage level, a part of the plurality of functions from the normal operation state is Transition to the function providing standby state to be restricted, monitor the supply voltage when operating in the function providing standby state, and the supply voltage exceeds the third predetermined voltage level If it determined to have increased to include instructions to be performed from the function providing standby computer for shifting to the normal operation state.

Although the present disclosure has been described with reference to the embodiments, it is understood that the present disclosure is not limited to the embodiments and structures. The present disclosure includes various modifications and modifications within the equivalent range. In addition, various combinations and forms, as well as other combinations and forms including only one element, more or less, are within the scope and spirit of the present disclosure.

Claims

A supply voltage detector (3) for detecting a supply voltage supplied to the device from the vehicle battery (9);
The apparatus is reset by performing a reset process when the supply voltage detected by the supply voltage detection unit falls below a first predetermined voltage level, and the supply voltage is lower than the first predetermined voltage level. A control unit (2) that operates in a normal operation state capable of providing a plurality of functions when the second predetermined voltage level is higher than the second predetermined voltage level;
The control unit is capable of transitioning between the normal operation state and a function providing standby state that restricts some of the plurality of functions.
When the control unit is operating in the normal operation state and the supply voltage decreases to less than the second predetermined voltage level, the control unit transitions from the normal operation state to the function providing standby state,
The control device is a vehicle device that transitions from the function providing standby state to the normal operating state when the supply voltage increases to exceed a third predetermined voltage level when operating in the function providing standby state.
The vehicle apparatus according to claim 1,
The control device is a vehicle device in which the third predetermined voltage level is set higher than the second predetermined voltage level.
In the vehicle apparatus according to claim 1 or 2,
It further comprises at least one of a display control unit (4) that performs display control, a voice output control unit (5) that performs voice output control, and a communication control unit (6) that performs communication control.
When the control unit transitions from the normal operation state to the function providing standby state, the control unit stops at least one of the display control unit, the audio output control unit, and the communication control unit,
When the control unit transitions from the function providing standby state to the normal operation state, the control unit switches from the normal operation state to the function providing standby state among the display control unit, the audio output control unit, and the communication control unit. A device for a vehicle that restarts any of the vehicles that were stopped when transitioning.
In the vehicle apparatus as described in any one of Claim 1 to 3,
The vehicle device transitions from the function providing standby state to the power-off state when the control unit continues the function providing standby state for a predetermined time after transitioning from the normal operation state to the function providing standby state.
The vehicle device according to claim 4,
A volatile storage unit (7) capable of storing data;
A non-volatile storage unit (8) capable of storing data;
When the control unit continues the function providing standby state for a predetermined time after transitioning from the normal operation state to the function providing standby state, the data stored in the volatile storage unit is stored in the nonvolatile memory. The apparatus for vehicles which changes to the power-off state from the said function provision standby state after memorize | storing in a part and evacuating.
When the supply voltage supplied from the vehicle battery (9) to the device drops below a first predetermined voltage level, the device is reset by performing a reset process, and the supply voltage is set to the first predetermined voltage level. A control unit (2) operating in a normal operating state capable of providing a plurality of functions when the second predetermined voltage level is higher than
Allowing the supply voltage to be monitored when operating in the normal operating state;
When it is determined that the supply voltage has dropped below the second predetermined voltage level, a transition is made from the normal operation state to a function providing standby state that restricts some of the plurality of functions,
Allowing the supply voltage to be monitored when operating in the function providing standby state;
A computer-implemented instruction for transitioning from the function providing standby state to the normal operating state upon determining that the supply voltage has increased to a third predetermined voltage level that is higher than the second predetermined voltage level; A state transition program product stored on a computer-readable persistent and tangible storage medium.