JP2021088246A - On-vehicle system, on-vehicle information registration device and information registration method - Google Patents

Abstract

To provide an on-vehicle system, an on-vehicle information registration device and an information registration method which are expected to facilitate registration of specific information on a plurality of on-vehicle devices.SOLUTION: An on-vehicle system, for registering specific information on a plurality of on-vehicle devices mounted on a vehicle, comprises: a communication section which communicates with the plurality of on-vehicle devices; an electric power source control section which powers on the plurality of on-vehicle devices in a predetermined order; and an information transmission section which transmits the specific information to be registered with respect to the on-vehicle devices available to communicate with the communication section. The on-vehicle device may have: a storage section which stores individual information; and an information registration section which causes the storage section to store the received individual information when receiving the individual information to be registered which is not stored in the storage section and transmitted from the information transmission section.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to an in-vehicle system for registering individual information in a plurality of in-vehicle devices mounted on a vehicle, an in-vehicle information registration device, and an information registration method.

Conventionally, a vehicle is equipped with a plurality of in-vehicle devices such as ECUs (Electronic Control Units), and the plurality of in-vehicle devices exchange information via an in-vehicle network. In recent years, the number of in-vehicle devices mounted on a vehicle has increased, and the network inside the vehicle has tended to become complicated. On the other hand, for example, a network configuration has been proposed in which a vehicle is divided into a plurality of areas, a relay device is arranged for each area to connect a plurality of in-vehicle devices, and the relay device in each area is connected to a central relay device. There is. In an in-vehicle system having such a network configuration, a common device (device with the same hardware configuration, device with the same part number, the same product, general-purpose product) is used for a plurality of relay devices provided for each area. It can be expected to reduce the cost of.

In Patent Document 1, the mounting positions where the in-vehicle device can be mounted are divided into groups of one or more, and the in-vehicle device is mounted on the vehicle by a different mounting method for each group, and the in-vehicle device differs depending on the difference in the mounting method. An in-vehicle LAN (Local Area Network) system that generates a signal and outputs it to another device has been proposed.

Japanese Unexamined Patent Publication No. 2005-142817

When a plurality of devices included in an in-vehicle system are shared, it is necessary to register information unique to the device such as identification information for identifying the device or address information used for communication, for example, at the manufacturing stage of a vehicle.

The present disclosure has been made in view of such circumstances, and an object thereof is an in-vehicle system, an in-vehicle information registration device, and information that can be expected to facilitate registration of unique information for a plurality of in-vehicle devices. To provide a registration method.

The in-vehicle system according to this aspect is an in-vehicle system that registers individual information for a plurality of in-vehicle devices mounted on a vehicle, and is a communication unit that communicates with the plurality of in-vehicle devices and the plurality of in-vehicle devices. On the other hand, a power control unit that turns on the power of the in-vehicle device in a predetermined order, and an information transmission unit that transmits individual information to be registered to the in-vehicle device that the communication unit can communicate with. Be prepared.

The present application can be realized not only as a device such as an in-vehicle device or an in-vehicle information registration device provided with such a characteristic processing unit, but also can be realized as a method in which such characteristic processing is a step, or such a step can be realized. It can be realized as a computer program to be executed by a computer. It can be realized as a semiconductor integrated circuit that realizes a part or all of these devices, or can be realized as another device or system including these devices.

According to the above, it can be expected that the registration of unique information for a plurality of in-vehicle devices will be facilitated.

It is a schematic diagram which shows one configuration example of the in-vehicle system which concerns on this embodiment. It is a block diagram which shows the structure of the central ECU which concerns on this embodiment. It is a schematic diagram which shows an example of a unique information DB. It is a block diagram which shows the structure of the peripheral ECU which concerns on this embodiment. It is a block diagram which shows the structure of the power-source control ECU which concerns on this embodiment. It is a flowchart which shows the procedure of the process performed by the central ECU which concerns on this embodiment. It is a flowchart which shows the procedure of the process performed by the power supply control ECU which concerns on this embodiment. It is a flowchart which shows the procedure of the process performed by the peripheral ECU which concerns on this embodiment. It is a schematic diagram which shows one configuration example of the in-vehicle system which concerns on the modification.

[Explanation of Embodiments of the present disclosure]
First, embodiments of the present disclosure will be listed and described. At least a part of the embodiments described below may be arbitrarily combined.

(1) The in-vehicle system according to this embodiment is an in-vehicle system that registers individual information for a plurality of in-vehicle devices mounted on a vehicle, and includes a communication unit that communicates with the plurality of in-vehicle devices and the plurality of in-vehicle devices. Information transmission that transmits individual information to be registered to the power control unit that turns on the power of the in-vehicle device in a predetermined order and the in-vehicle device that the communication unit can communicate with. It has a part.

In this embodiment, individual information such as identification information or address information is registered in a plurality of in-vehicle devices mounted on the vehicle. The individual information may include various information such as data necessary for processing such as a routing table and a program such as an application program. The information registration device that registers individual information can communicate with a plurality of in-vehicle devices. The information registration device or another device turns on the power of the plurality of in-vehicle devices in a predetermined order, and the turned-on in-vehicle device starts communication with the information registration device. The information registration device transmits individual information to be registered to the in-vehicle device that can communicate by turning on the power, and causes the in-vehicle device to register the individual information. As a result, the information registration device can transmit and register individual information in a predetermined order to a plurality of in-vehicle devices that are turned on in a predetermined order, and can register unique information for the plurality of in-vehicle devices. Can be expected to be facilitated.

(2) The in-vehicle device receives a storage unit that stores individual information, and when the individual information is not stored in the storage unit and the individual information to be registered transmitted by the information transmission unit is received. It is preferable to have an information registration unit that stores the received individual information in the storage unit.

In this embodiment, the in-vehicle device has a storage unit for storing individual information. When the in-vehicle device does not store the individual information in the storage unit and receives the individual information transmitted by the information registration device, the in-vehicle device registers the individual information by storing the received individual information in the storage unit. .. When the individual information is already stored in the storage unit, the in-vehicle device does not store the individual information in the storage unit even if the individual information transmitted by the information registration device is received. As a result, the information registration device that transmits the individual information can transmit the individual information by a method such as broadcasting without determining whether or not the in-vehicle device that has become communicable has registered the individual information. It can be expected to facilitate the transmission process of individual information by the information registration device.

(3) An information acquisition unit for acquiring individual information to be registered for the plurality of in-vehicle devices from an external device of the vehicle is provided, and the information transmission unit obtains the individual information acquired by the information acquisition unit. It is preferable to transmit to the in-vehicle device.

In this embodiment, the information registration device acquires individual information to be registered for a plurality of in-vehicle devices from a device existing outside the vehicle. The information registration device transmits the individual information acquired from the external device to the in-vehicle device capable of communicating, and causes the in-vehicle device to register the individual information. This eliminates the need for the information registration device to store individual information to be registered in the plurality of in-vehicle devices in advance.

(4) It is preferable to include an information registration device having the communication unit and the information transmission unit, and a power supply control device having the power supply control unit.

In this embodiment, an information registration device for communicating with the in-vehicle device and registering individual information and a power control device for turning on the in-vehicle device in a predetermined order are provided as separate devices in the vehicle. As a result, cables such as communication lines and power lines are not concentrated in one device, and it can be expected that the degree of freedom of cable wiring in the vehicle is increased.

(5) It is preferable to include an information registration device having the communication unit, the information transmission unit, and the power supply control unit.

In this embodiment, the information registration device controls communication with the vehicle-mounted device, registration of individual information, and power-on of the vehicle-mounted device. This can be expected to reduce the number of devices mounted on the vehicle.

(6) The plurality of in-vehicle devices are preferably devices having the same hardware configuration.

In this embodiment, the plurality of in-vehicle devices for which individual information is registered are devices having the same hardware configuration. This can be expected to reduce the cost of the in-vehicle system.

(7) It is preferable that the plurality of in-vehicle devices are devices that can be replaced with each other by changing individual information.

In this embodiment, the plurality of in-vehicle devices for which individual information is registered are devices that can be replaced with each other by changing the individual information. This can be expected to reduce the cost of the in-vehicle system.

(8) The in-vehicle information registration device according to the present embodiment includes a processing unit and a communication unit that communicates with a plurality of in-vehicle devices mounted on the vehicle, and the processing unit refers to the plurality of in-vehicle devices. , The power of the in-vehicle device is turned on in a predetermined order, and the individual information to be registered is transmitted to the in-vehicle device to which the communication unit can communicate.

In this aspect, as in the aspect (1), it can be expected that the registration of unique information for a plurality of in-vehicle devices will be facilitated.

(9) The in-vehicle information registration device according to this aspect includes a processing unit and a communication unit that communicates with a plurality of in-vehicle devices mounted on the vehicle and a power supply control device, and the processing unit is the power supply control device. Communicates to the plurality of vehicle-mounted devices instructing the power-on in a predetermined order, and transmits individual information to be registered to the vehicle-mounted devices to which the communication unit can communicate.

In this aspect, as in the aspect (1), it can be expected that the registration of unique information for a plurality of in-vehicle devices will be facilitated.

(10) The information registration method according to this aspect is an information registration method for registering individual information for a plurality of in-vehicle devices mounted on a vehicle, and the above-mentioned information registration method for the plurality of in-vehicle devices in a predetermined order. The power of the in-vehicle device is turned on, and individual information to be registered is transmitted to the in-vehicle device that has become communicable.

In this aspect, as in the aspect (1), it can be expected that the registration of unique information for a plurality of in-vehicle devices will be facilitated.

[Details of Embodiments of the present disclosure]
A specific example of the in-vehicle information processing device according to the embodiment of the present disclosure will be described below with reference to the drawings. The present disclosure is not limited to these examples, but is shown by the scope of claims and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

<System configuration>
FIG. 1 is a schematic view showing a configuration example of an in-vehicle system according to the present embodiment. The in-vehicle system according to the present embodiment has a configuration in which a central ECU 1, peripheral ECUs 2a to 2d, a power supply control ECU 3, a plurality of sensors 4a to 4d, and a plurality of actuators 5a to 5d are mounted at appropriate positions in the vehicle 100. Is. In FIG. 1, it is assumed that the front-rear, left-right directions of the vehicle 100 correspond to the up-down, left-right directions in the figure. The arrow indicated by a fine solid line in FIG. 1 is a communication line for performing communication between devices or a signal line for performing signal input / output between devices. The thick broken line in FIG. 1 is a power line forming a power supply path between devices.

The central ECU 1 is an ECU arranged in the center of the vehicle 100, and relays communication between a plurality of peripheral ECUs 2a to 2d. In the in-vehicle system according to the present embodiment, four peripheral ECUs 2a to 2d are connected to the central ECU 1 via communication lines. In the present embodiment, the central ECU 1 and the four peripheral ECUs 2a to 2d communicate according to a communication protocol such as Ethernet (registered trademark) or CAN (Controller Area Network). The central ECU 1 performs a process of relaying message transmission / reception between the peripheral ECUs 2a to 2d by transmitting a message received from any of the peripheral ECUs 2a to 2d to the other peripheral ECUs 2a to 2d.

Peripheral ECUs 2a to 2d are ECUs arranged in the peripheral portion of the vehicle. In the illustrated example, the peripheral ECU 2a is arranged on the left front side of the vehicle 100, the peripheral ECU 2b is arranged on the right front side, the peripheral ECU 2c is arranged on the right rear side, and the peripheral ECU 2d is arranged on the left rear side. Sensors 4a to 4d are connected to the peripheral ECUs 2a to 2d as input devices for inputting information, and actuators 5a to 5d are connected as devices to be controlled. However, the input devices connected to the peripheral ECUs 2a to 2d are not limited to the sensors 4a to 4d, and may be various devices such as switches operated by the user, for example. The devices to be controlled to which the peripheral ECUs 2a to 2d are connected are not limited to the actuators 5a to 5d, and may be various devices such as a motor or a light. Both the sensors 4a to 4d and the actuators 5a to 5d may not be connected to the peripheral ECUs 2a to 2d, and only one of the sensors 4a to 4d or the actuators 5a to 5d may be connected.

For example, the peripheral ECUs 2a to 2d perform a process of controlling the operation of the actuators 5a to 5d to be controlled according to various physical quantities detected by the sensors 4a to 4d. The sensors 4a to 4d input analog or digital electric signals according to the physical quantity which is the detection result to the peripheral ECUs 2a to 2d via the signal line. The peripheral ECUs 2a to 2d input analog or digital electric signals according to the control amount of the actuators 5a to 5d to the actuators 5a to 5d via signal lines.

Another ECU may be connected to the peripheral ECUs 2a to 2d via one or more communication lines. Here, another ECU is an ECU different from the central ECU 1 and the peripheral ECUs 2a to 2d. Each of the peripheral ECUs 2a to 2d may be connected to another ECU arranged in the vicinity, and may relay a relay between the other ECU and the central ECU 1.

The power control ECU 3 is a device that supplies electric power supplied from a battery or the like mounted on the vehicle to the central ECU 1 and the peripheral ECUs 2a to 2d and the like. The power control ECU 3 according to the present embodiment can individually switch the supply / non-supply of electric power to at least four peripheral ECUs 2a to 2d, and can individually power on / off the peripheral ECUs 2a to 2d. The power supply control ECU 3 according to the present embodiment can communicate with the central ECU 1, and when the central ECU 1 instructs to start the power control ECU 3 in the registration mode of individual information, the peripheral ECUs 2a to 2d are sequentially arranged in a predetermined order. You can turn on the power one by one.

In the in-vehicle system according to the present embodiment, the four peripheral ECUs 2a to 2d are the same device (common device). The four peripheral ECUs 2a to 2d are, for example, devices having the same hardware configuration, devices having the same part number, the same product, general-purpose products, and the like. The difference between the four peripheral ECUs 2a to 2d is the content of individual information stored in a storage unit such as a memory or a hard disk. By appropriately registering the individual information, the peripheral ECUs 2a to 2d can perform processing suitable for the area of the installed vehicle. In other words, the peripheral ECU 2a and the peripheral ECU 2b can be interchanged and used, for example, by exchanging the individual information in FIG.

In the in-vehicle system according to the present embodiment, for example, in the manufacturing process of the vehicle 100, the central ECU 1, the peripheral ECUs 2a to 2d, the power supply control ECU 3, and the like are mounted on the vehicle 100 and connected by a communication line, a power line, or the like. After the construction of such a hardware-like in-vehicle system is completed, the in-vehicle system according to the present embodiment constructs a software-like in-vehicle system by registering appropriate individual information in each of the ECUs 2a to 2d. ..

In the in-vehicle system according to the present embodiment, for example, the central ECU 1 instructs the power supply control ECU 3 to turn on the power in the individual information registration mode, so that the individual information registration process can be started. The central ECU 1 performs wireless or wired communication with a device provided outside the vehicle 100 prior to performing the registration process of the individual information, and the individual information to be registered from the external device to the peripheral ECUs 2a to 2d. To get. As the external device, for example, a device installed in the manufacturing plant of the vehicle 100, a device carried by a worker of the manufacturing plant, or the like can be used.

The power control ECU 3 that receives the instruction from the central ECU 1 turns on the power of the plurality of peripheral ECUs 2a to 2d one by one in a predetermined order. For example, the power control ECU 3 first turns on the power to the peripheral ECU 2a to start the power control ECU 3, and then turns on the power to the next peripheral ECU 2a after a predetermined time (several seconds, several tens of seconds, etc.) has elapsed. The power control ECU 3 turns on the power in the order of, for example, the peripheral ECU 2a, the peripheral ECU 2b, the peripheral ECU 2c, and the peripheral ECU 2d at predetermined times.

The peripheral ECUs 2a to 2d that have been turned on start the communication process after performing the initialization process and the like, and transmit a message to the central ECU 1. The individual information of the peripheral ECUs 2a to 2d according to the present embodiment is, for example, identification information of the peripheral ECUs 2a to 2d. The peripheral ECUs 2a to 2d transmit the message transmitted by themselves with the identification information registered in the peripheral ECU 2a to 2d as individual information. In the storage units of the peripheral ECUs 2a to 2d, the default value of the individual information is stored in the state where the individual information is not registered. The default value is the same value for all peripheral ECUs 2a to 2d. Therefore, the peripheral ECUs 2a to 2d in which the individual information is not registered attach the identification information of the default value to the message and transmit it to the central ECU 1.

The central ECU 1 that has received the message with the default value registers individual information with the peripheral ECUs 2a to 2d that have transmitted this message. The central ECU 1 transmits a message including individual information to be registered to the communication line that has received the message with the default value. When the peripheral ECUs 2a to 2d that have received the message including the individual information from the central ECU 1 do not store the individual information in their own storage unit (the default value is stored), the peripheral ECUs 2a to 2d store the individual information included in the received message. Individual information is registered by storing it in the section (overwriting the default value). After that, the peripheral ECUs 2a to 2d can transmit a message using the registered individual information.

The power control ECU 3 turns on the peripheral ECUs 2a to 2d in a predetermined order, and the central ECU 1 transmits individual information to the peripheral ECUs 2a to 2d in this order to register the peripheral ECUs 2a to 2d. You can complete the registration of individual information about. The peripheral ECUs 2a to 2d in which the individual information is registered may subsequently transmit a message using the individual information. The power control ECU 3 turns on the power to the plurality of peripheral ECUs 2a to 2d in a predetermined order at intervals of a sufficient time that it can be expected that there is only one peripheral ECU 2a to 2d in which individual information is not registered.

<Device configuration>
FIG. 2 is a block diagram showing a configuration of the central ECU 1 according to the present embodiment. The central processing unit 1 according to the present embodiment includes a processing unit (processor) 11, a storage unit (storage) 12, five communication units (transceivers) 13a to 13e, a wireless communication unit 14, and the like. The processing unit 11 is configured by using an arithmetic processing unit such as a CPU (Central Processing Unit) or an MPU (Micro-Processing Unit). The processing unit 11 can perform various processes by reading and executing the program stored in the storage unit 12. In the present embodiment, the processing unit 11 reads and executes the program 12a stored in the storage unit 12 to relay the message between the peripheral ECUs 2a to 2d and to register the unique information in the peripheral ECUs 2a to 2d. Perform various processes such as processing.

The storage unit 12 is configured by using a non-volatile memory element such as a flash memory or an EEPROM (Electrically Erasable Programmable Read Only Memory). The storage unit 12 stores various programs executed by the processing unit 11 and various data required for processing by the processing unit 11. In the present embodiment, the storage unit 12 stores the program 12a executed by the processing unit 11 and the individual information DB (database) 12b that stores the individual information to be registered in the peripheral ECUs 2a to 2d.

The program 12a may be written in the storage unit 12 at the manufacturing stage of the central ECU 1, for example, and the central ECU 1 may acquire what is distributed by a remote server device or the like by communication, for example, a memory card or an optical disk. The program recorded on the recording medium 99 such as the above may be read by the central ECU 1 and stored in the storage unit 12. For example, the writing device may read the program recorded on the recording medium 99 and write it in the storage unit 12 of the central ECU 1. But it may be. The program 12a may be provided in the form of distribution via the network, or may be provided in the form recorded on the recording medium 99.

FIG. 3 is a schematic diagram showing an example of the unique information DB 12b. In the unique information DB 12b included in the central ECU 1 according to the present embodiment, the "startup order" and the "unique information" are stored in association with each other. The "startup order" is information indicating the order in which the power supply control ECU 3 activates the plurality of peripheral ECUs 2a to 2d in the registration mode. The "unique information" is information registered in the peripheral ECUs 2a to 2d, and in this example, values of 0001 to 0004 as device IDs are registered in the peripheral ECUs 2a to 2d as unique information. The information of the unique information DB 12b is possessed by the information transmission device 110 installed outside the vehicle 100, and the central ECU 1 acquires the unique information from the information transmission device 110 by wireless communication or the like and stores it in the storage unit 12. In this example, the unique information is used as the ID, but the information is not limited to this, and may be information such as an IP (Internet Protocol) address or a MAC (Media Access Control) address, for example, the sensors 4a to 4d and the actuator 5a. It may be numerical information such as parameters for operating ~ 5d and the like, and may be, for example, a program such as an application program to be installed in the peripheral ECUs 2a to 2d.

The communication units 13a to 13e are connected to communication lines arranged in the vehicle 100, and communicate with other devices in the vehicle 100 via the communication lines. The communication units 13a to 13d transmit and receive messages according to a communication protocol such as Ethernet or CAN. In the present embodiment, the communication unit 13a communicates with the peripheral ECU 2a, the communication unit 13b communicates with the peripheral ECU 2b, the communication unit 13c communicates with the peripheral ECU 2c, and the communication unit 13d communicates with the peripheral ECU 2d. It is assumed that communication is performed and the communication unit 13e communicates with the power supply control ECU 3. The communication units 13a to 13e can be configured by using an IC such as an Ethernet PHY (PHYsical layer) or a CAN controller. However, the communication standards used by the communication units 13a to 13e are not limited to Ethernet or CAN, and communication standards such as FlexRay or LIN (Local Interconnect Network) may be adopted. The communication units 13a to 13e transmit the message by outputting the message given from the processing unit 11 as an electric signal to the communication line. The communication units 13a to 13e convert the electric signal on the communication line into digital data by sampling and acquiring the potential of the communication line, and give the converted data to the processing unit 11 as a received message.

The wireless communication unit 14 performs wireless communication such as wireless LAN, Bluetooth (registered trademark), NFC (Near Field Communication), or a mobile phone communication network. In the present embodiment, the wireless communication unit 14 performs wireless communication with the information transmission device 110 installed outside the vehicle 100. The wireless communication unit 14 converts the wireless signal received from the information transmission device 110 into digital data, and gives the converted data to the processing unit 11 as a received message. The wireless communication unit 14 transmits a message to the information transmission device 110 by outputting the message given by the processing unit 11 as a wireless signal. In the present embodiment, the central ECU 1 has a wireless communication function, but the present invention is not limited to this, and the central ECU 1 uses a wireless communication device mounted as a separate device on the vehicle 100 to transmit information. Communication with 110 may be performed. The central ECU 1 and the information transmission device 110 may perform wired communication.

In the central ECU 1 according to the present embodiment, the processing unit 11 reads out and executes the program 12a stored in the storage unit 12, so that the information acquisition unit 11a, the power supply control unit 11b, the information transmission unit 11c, and the like are processed by the processing unit 21. It is realized as a software-like functional part. The information acquisition unit 11a performs wireless communication with the information transmission device 110 by the wireless communication unit 14, and performs a process of acquiring unique information from the information transmission device 110. The information transmission device 110 manages unique information for each type of the vehicle 100, for example, and the information acquisition unit 11a requests the information transmission device 110 to transmit the unique information by designating the type of the vehicle 100, and responds to this request. The unique information transmitted from the information transmission device 110 is received by the wireless communication unit 14 and stored in the unique information DB 12b of the storage unit 12.

The power supply control unit 11b performs a process of controlling the operation of the power supply control ECU 3 by communicating with the power supply control ECU 3 in the communication unit 13e. In the present embodiment, the central ECU 1 operates in a registration mode in which the above-mentioned unique information registration process is performed by, for example, an operator performing a predetermined operation in the manufacturing process of the vehicle 100. In the central ECU 1 that operates in the registration mode, the power supply control unit 11b gives an instruction to the power supply control ECU 3 to turn on the power in the registration mode. In response to this instruction, the power control ECU 3 powers on the plurality of peripheral ECUs 2a to 2d in a predetermined order. In the normal operation mode, the power supply control unit 11b may individually control the power supply control ECU 3 to switch the power supply of the peripheral ECUs 2a to 2d on / off.

The information transmission unit 11c registers the unique information in the peripheral ECUs 2a to 2d by performing a process of transmitting the unique information to the peripheral ECUs 2a to 2d. In the central ECU 1 operating in the registration mode, when any one of the plurality of communication units 13a to 13d receives a message with a default value attached to the ID, the information transmission unit 11c is transmitted from the unique information DB 12b of the storage unit 12. Read one unique information. The information transmission unit 11c transmits a message including individual information to be registered from the communication units 13a to 13d that have received the message with the default value. When the peripheral ECUs 2a to 2d that have received this message are in a state in which the unique information is not registered (the stored unique information is in the default value state), the peripheral ECUs 2a to 2d acquire the unique information included in the received message and store it in the storage unit. Memorize and register unique information. The information transmission unit 11c reads out a plurality of unique information stored in the unique information DB 12b in order from the earliest activation order and transmits the plurality of unique information to the peripheral ECUs 2a to 2d. The information transmission unit 11c may confirm whether or not the unique information has been registered after transmitting the message including the unique information. For example, after transmitting a message containing unique information, the information transmitting unit 11c has the unique information based on whether or not the communication units 13a to 13d that have transmitted the message have received the message with the unique information as an ID. It is possible to judge the correctness of the registration of.

FIG. 4 is a block diagram showing a configuration of a peripheral ECU 2 according to the present embodiment. Since the plurality of peripheral ECUs 2a to 2d included in the in-vehicle system have substantially the same configuration, the following description will be simply given as the peripheral ECU 2 when it is not necessary to distinguish between them. Similarly, when it is not necessary to distinguish between the sensors 4a to 4d and the actuators 5a to 5d, the following description will be given simply as the sensor 4 and the actuator 5.

The peripheral ECU 2 according to the present embodiment includes a processing unit (processor) 21, a storage unit (storage) 22, a communication unit (transceiver) 23, an input / output unit 24, and the like. The processing unit 21 is configured by using an arithmetic processing unit such as a CPU or an MPU. The processing unit 21 can perform various processes by reading and executing the program stored in the storage unit 22. In the present embodiment, the processing unit 21 reads and executes the program 22a stored in the storage unit 22, thereby controlling the sensor 4 and the actuator 5, communicating with the central ECU 1, and registering unique information. And so on.

The storage unit 22 is configured by using a non-volatile memory element such as a flash memory or EEPROM. The storage unit 22 stores various programs executed by the processing unit 21 and various data required for processing by the processing unit 21. In the present embodiment, the storage unit 22 stores the program 22a executed by the processing unit 21 and the unique information 22b required for the processing of the processing unit 21.

The program 22a may be written in the storage unit 22 at the manufacturing stage of the peripheral ECU 2, for example, and the peripheral ECU 2 may acquire what is distributed by a remote server device or the like by communication, for example, a memory card or an optical disk. The program recorded on the recording medium 98 such as the above may be read by the peripheral ECU 2 and stored in the storage unit 22. For example, the writing device may read the program recorded on the recording medium 98 and write it in the storage unit 22 of the peripheral ECU 2. But it may be. The program 22a may be provided in a mode of distribution via a network, or may be provided in a mode recorded on a recording medium 98.

The unique information 22b is various information necessary for processing of the peripheral ECU 2. In the unique information 22b in the present embodiment, values of 0001 to 0004 are registered as the ID of the device. In the state where the unique information is not registered (the state at the time of product shipment of the peripheral ECU 2), a specific value (for example, ID = 9999) is stored in the storage unit 12 as the unique information 22b as a default value. In the present embodiment, the peripheral ECU 2 attaches an ID stored as unique information 22b in the storage unit 12 to a message and transmits the message.

The communication unit 23 is connected to a communication line arranged in the vehicle 100, and communicates with other devices in the vehicle 100 via the communication line. The communication unit 23 transmits / receives a message according to a communication protocol such as Ethernet or CAN. The communication unit 23 may be configured by using an IC such as an Ethernet PHY or a CAN controller. The communication unit 23 transmits a message by outputting the message given by the processing unit 21 as an electric signal to the communication line. The communication unit 23 converts the electric signal on the communication line into digital data by sampling and acquiring the potential of the communication line, and gives the converted data to the processing unit 21 as a received message.

The input / output unit 24 is connected to the sensor 4 and the actuator 5 via a signal line, receives an input of a signal from the sensor 4, and outputs a signal to the actuator 5. For example, the sensor 4 outputs an electric signal according to the detection result, the input / output unit 24 samples and acquires the output signal of the sensor 4, and gives the detection result of the sensor 4 to the processing unit 21 as digital data. For example, the input / output unit 24 controls the operation of the actuator 5 by generating an electric signal having a voltage corresponding to the control amount given by the processing unit 21 and outputting it to the actuator 5.

In the peripheral ECU 2 according to the present embodiment, the processing unit 21 reads out and executes the program 22a stored in the storage unit 22, so that the information registration unit 21a and the like are realized in the processing unit 21 as a software-like functional unit. .. The information registration unit 21a performs a process of registering the unique information 22b in the storage unit 22. When the communication unit 23 receives a message including unique information from the central ECU 1, the information registration unit 21a determines whether or not the unique information 22b stored in the storage unit 22 is a default value. When the unique information 22b is the default value, the information registration unit 21a registers the unique information 22b by storing (overwriting) the unique information included in the message received from the central ECU 1 as the unique information 22b in the storage unit 22. To do.

FIG. 5 is a block diagram showing a configuration of the power supply control ECU 3 according to the present embodiment. The power supply control ECU 3 according to the present embodiment includes a control unit (controller) 31, a power supply circuit 32, a communication unit (transceiver) 33, and four switches SWa to SWd. The control unit 31 controls the supply / non-supply of electric power (power on / off) to the peripheral ECUs 2a to 2d by individually controlling the energization / disconnection of the four switches SWa to SWd. In the present embodiment, when the central ECU 1 gives an instruction to turn on the power in the registration mode, the control unit 31 switches the switches SWa to SWd to the energized state in a predetermined order, thereby causing the four peripheral ECUs 2a to 2d. Power on in the specified order. The order of power-on, the interval of power-on, and the like may be predetermined and may be included in the instruction from the central ECU 1.

The power supply circuit 32 converts the electric power having a voltage value of 12V supplied from the battery 101 or the like mounted on the vehicle 100 into electric power such as 5V or 3V and outputs the electric power. The power supply control ECU 3 supplies the electric power obtained by converting the voltage value by the power supply circuit 32 to the central ECU 1 and the peripheral ECUs 2a to 2d. The power control ECU 3 is connected to a power line to which power is supplied from the battery 101 and a plurality of power lines for individually supplying power to the central ECU 1 and the peripheral ECUs 2a to 2d.

The communication unit 33 is connected to a communication line arranged in the vehicle 100, and communicates with other devices in the vehicle 100 via the communication line. The communication unit 33 transmits / receives a message according to a communication protocol such as Ethernet or CAN. The communication unit 33 may be configured by using an IC such as an Ethernet PHY or a CAN controller. The communication unit 33 converts the electric signal on the communication line into digital data by sampling and acquiring the potential of the communication line, and gives the converted data to the control unit 31 as a received message. The communication unit 33 transmits a message by outputting the message given by the control unit 31 as an electric signal to the communication line.

The four switches SWa to SWd are arranged in four power supply paths from the power supply circuit 32 to the four peripheral ECUs 2a to 2d. The switches SWa to SWd are controlled by the control unit 31 to switch between energization and cutoff. By energizing the switches SWa to SWd, electric power is supplied to the peripheral ECUs 2a to 2d, and the peripheral ECUs 2a to 2d are activated to start the operation. By turning off the switches SWa to SWd, the power supply to the peripheral ECUs 2a to 2d is stopped, and the peripheral ECUs 2a to 2d stop operating.

<Registration process of unique information>
FIG. 6 is a flowchart showing a procedure of processing performed by the central ECU 1 according to the present embodiment. The central ECU 1 according to the present embodiment operates as a registration mode in which unique information is registered to the peripheral ECUs 2a to 2d in response to a predetermined operation by, for example, an operator. At this time, the information acquisition unit 11a of the processing unit 11 of the central ECU 1 communicates with the information transmission device 110 installed outside the vehicle 100 by the wireless communication unit 14 to acquire the unique information required for the registration process. (Step S1). The information acquisition unit 11a stores the unique information acquired from the information transmission device 110 in step S1 in the unique information DB 12b of the storage unit 12 (step S2). The power supply control unit 11b of the processing unit 11 communicates with the power supply control ECU 3 by the communication unit 13e, and instructs the power supply control ECU 3 to turn on the power of the peripheral ECUs 2a to 2d in the registration mode (step S3).

The information transmission unit 11c of the processing unit 11 determines whether or not any of the communication units 13a to 13d has received a message from the peripheral ECUs 2a to 2d (step S4). When the communication units 13a to 13d have not received the message (S4: NO), the information transmission unit 11c waits until any of the communication units 13a to 13d receives the message. When any of the communication units 13a to 13d receives a message from the peripheral ECUs 2a to 2d (S4: YES), the information transmission unit 11c determines whether or not the unique information included as an ID in the received message is the default value. (Step S5). If the ID is not the default value (S5: NO), the information transmission unit 11c returns to step S4 and waits until another message is received.

When the ID of the received message is the default value (S5: YES), the information transmission unit 11c reads one unique information from the unique information DB 12b of the storage unit 12 (step S6). At this time, the information transmission unit 11c reads out the unique information that has not been used in the registration process in order from the plurality of unique information stored in the unique information DB 12b in the order of the earliest activation order. The information transmission unit 11c transmits the unique information read in step S6 from the communication units 13a to 13d that received the message whose ID is the default value (step S7). As a result, unique information is registered in the peripheral ECUs 2a to 2d that have transmitted the message whose ID is the default value.

The information transmission unit 11c determines whether or not all the unique information stored in the unique information DB 12b has been registered with the peripheral ECUs 2a to 2d (step S8). If the registration of all the unique information has not been completed (S8: NO), the information transmission unit 11c returns to step S4 and registers the next unique information. When the registration of all the unique information is completed (S8: YES), the information transmission unit 11c ends the process.

FIG. 7 is a flowchart showing a procedure of processing performed by the power supply control ECU 3 according to the present embodiment. In this example, the procedure assuming that the process is started from the state where all the switches SWa to SWd of the power supply control ECU 3 are shut off is shown. The control unit 31 of the power supply control ECU 3 according to the present embodiment determines whether or not the communication unit 33 has received an instruction to turn on the power in the registration mode from the central ECU 1 (step S21). When the instruction is not received (S21: NO), the control unit 31 waits until the instruction is received.

When receiving the power-on instruction in the registration mode (S21: YES), the control unit 31 switches one switch SWa to SWd to the conductive state in a predetermined order (step S22). The control unit 31 determines whether or not all the continuity of the four switches SWa to SWd has been completed (step S23). When the conduction of all the switches SWa to SWd is not completed (S23: NO), the control unit 31 determines whether or not a predetermined time has elapsed from the conduction of the latest switches SWa to SWd (step S24). If the predetermined time has not elapsed (S24: NO), the control unit 31 waits until the predetermined time elapses. When the predetermined time has elapsed (S24: YES), the control unit 31 returns the process to step S22 and conducts the next one switch. When the conduction of all the switches SWa to SWd is completed (S23: YES), the control unit 31 ends the process.

FIG. 8 is a flowchart showing a procedure of processing performed by the peripheral ECU 2 according to the present embodiment. The peripheral ECU 2 according to the present embodiment is activated and starts processing when electric power is supplied by the power supply control ECU 3. The processing unit 21 of the activated peripheral ECU 2 reads out the unique information 22b stored in the storage unit 22 (step S31). The processing unit 21 transmits a message with the unique information read in step S31 as an ID in the communication unit 23 (step S32).

The information registration unit 21a of the processing unit 21 determines whether or not the unique information 22b read in step S31 is the default value (step S33). When the unique information 22b is the default value (S33: YES), the information registration unit 21a determines whether or not the communication unit 23 has received the message including the unique information transmitted from the central ECU 1 (step 34). .. When the message including the unique information is not received (S34: NO), the information registration unit 21a waits until the message including the unique information is received. When a message including the unique information is received (S34: YES), the information registration unit 21a acquires the unique information included in the received message and stores the acquired unique information in the storage unit 22 (step S35). , Return the process to step S31. After that, the processing unit 21 transmits a message with the registered unique information. When the unique information 22b read in step S31 is not the default value (S33: NO), the information registration unit 21a determines that the unique information 22b has been registered, and ends the process.

<Modification example>
FIG. 9 is a schematic view showing a configuration example of an in-vehicle system according to a modified example. The in-vehicle system according to the modified example includes the central ECU 201 that has the functions of the central ECU 1 and the power supply control ECU 3 described above. The central ECU 201 according to the modified example performs a process of relaying a message between the peripheral ECUs 2a to 2d, a process of controlling power supply to the peripheral ECUs 2a to 2d, a process of registering unique information in the peripheral ECUs 2a to 2d, and the like. .. By combining the central ECU 1 and the power supply control ECU 3 as one central ECU 201, the number of devices mounted on the vehicle 100 can be reduced, and the cost of the in-vehicle system can be expected to be reduced.

<Summary>
The in-vehicle system according to the present embodiment having the above configuration registers individual information such as identification information or address information in a plurality of peripheral ECUs 2a to 2d mounted on the vehicle 100. The individual information may include various information such as data such as a routing table or a program such as an application program. The central ECU 1 that registers individual information can communicate with a plurality of peripheral ECUs 2a to 2d. In response to the instruction from the central ECU 1, the power supply control ECU 3 turns on the power to the plurality of peripheral ECUs 2a to 2d in a predetermined order, and the power-on peripheral ECUs 2a to 2d start communication with the central ECU 1. The central ECU 1 transmits individual information to the peripheral ECUs 2a to 2d that can communicate by turning on the power and registers the information. As a result, the central ECU 1 can transmit individual information in a predetermined order to the plurality of peripheral ECUs 2a to 2d whose power is turned on in a predetermined order for registration, and is unique to the plurality of peripheral ECUs 2a to 2d. It can be expected to facilitate the registration of information.

In the in-vehicle system according to the present embodiment, the peripheral ECUs 2a to 2d have a storage unit 22 for storing individual information. When the peripheral ECUs 2a to 2d do not store the individual information in the storage unit 22 (the default value is stored as the individual information) and receive the individual information transmitted by the central ECU 1, the received individual information is stored. Individual information is registered by storing in the storage unit 22. When the peripheral ECUs 2a to 2d have already stored the individual information (not the default value) in the storage unit 22, even if the individual information transmitted by the central ECU 1 is received, the peripheral ECUs 2a to 2d do not store the individual information in the storage unit 22. As a result, the central ECU 1 that transmits the individual information transmits the individual information by, for example, broadcasting, without determining whether or not the peripheral ECUs 2a to 2d that have become communicable have registered the individual information. It can be expected that the central ECU 1 can facilitate the transmission process of individual information.

In the in-vehicle system according to the present embodiment, the central ECU 1 acquires individual information to be registered for the plurality of peripheral ECUs 2a to 2d from the information transmission device 110 existing outside the vehicle 100. The central ECU 1 transmits the individual information acquired from the external information transmission device 110 to the peripheral ECUs 2a to 2d capable of communicating, and causes the peripheral ECUs 2a to 2d to register the individual information. This eliminates the need for the central ECU 1 to store individual information to be registered in the plurality of peripheral ECUs 2a to 2d in advance.

In the in-vehicle system according to the present embodiment, the central ECU 1 that communicates with the peripheral ECUs 2a to 2d and registers individual information and the power supply control ECU 3 that powers on the peripheral ECUs 2a to 2d in a predetermined order are separated into the vehicle 100. Provided as. As a result, cables such as communication lines and power lines are not concentrated in one device, and the degree of freedom of cable wiring in the vehicle 100 can be increased.

In the in-vehicle system according to the present embodiment, the plurality of peripheral ECUs 2a to 2d for which individual information is registered are devices having the same hardware configuration and can be replaced with each other by changing the individual information. is there. This can be expected to reduce the cost of the in-vehicle system.

In the present embodiment, the device for registering individual information is the central ECU 1, and the devices for registering individual information are the peripheral ECUs 2a to 2d. However, these devices are examples, and what kind of device is which? Unique information of such a device may be registered. If a system in which a plurality of devices for which individual information is registered is connected to a device for registering individual information via a communication line, the same unique information registration process can be performed.

Each device in the in-vehicle system includes a computer including a microprocessor, ROM, RAM, and the like. An arithmetic processing unit such as a microprocessor reads a computer program including a part or all of each step of a sequence diagram or a flowchart as shown in FIGS. 3 and 5 from a storage unit such as a ROM or a RAM and executes the program. You can. The computer programs of these plurality of devices can be installed from an external server device or the like. The computer programs of these plurality of devices are distributed in a state of being stored in a recording medium such as a CD-ROM, a DVD-ROM, or a semiconductor memory, respectively.

The embodiments disclosed this time should be considered as exemplary in all respects and not restrictive. The scope of the present disclosure is indicated by the scope of claims, not the above-mentioned meaning, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

1 Central ECU (information registration device)
2, 2a-2d peripheral ECU (vehicle-mounted device)
3 Power control ECU (power control device)
4, 4a to 4d Sensor 5, 5a to 5d Actuator 11 Processing unit 11a Information acquisition unit 11b Power control unit 11c Information transmission unit 12 Storage unit 12a Program 12b Unique information DB
13a to 13e Communication unit 14 Wireless communication unit 21 Processing unit 21a Information registration unit 22 Storage unit 22a Program 22b Unique information 23 Communication unit 24 Input / output unit 31 Control unit (power supply control unit)
32 Power supply circuit 33 Communication unit 98, 99 Recording medium 100 Vehicle 101 Battery 110 Information transmission device 210 Central ECU (information registration device)
SWa to SWd switch

Claims (10)

An in-vehicle system that registers individual information for multiple in-vehicle devices mounted on a vehicle.
A communication unit that communicates with the plurality of in-vehicle devices,
A power control unit that turns on the power of the in-vehicle device in a predetermined order with respect to the plurality of in-vehicle devices.
An in-vehicle system including an information transmission unit that transmits individual information to be registered to the in-vehicle device to which the communication unit can communicate. The in-vehicle device is
A storage unit that stores individual information and
When the individual information is not stored in the storage unit and the individual information to be registered transmitted by the information transmission unit is received, the information registration unit that stores the received individual information in the storage unit is used. The in-vehicle system according to claim 1. An information acquisition unit for acquiring individual information to be registered for the plurality of in-vehicle devices from an external device of the vehicle is provided.
The information transmission unit transmits the individual information acquired by the information acquisition unit to the vehicle-mounted device.
The in-vehicle system according to claim 1 or 2. An information registration device having the communication unit and the information transmission unit,
The vehicle-mounted system according to any one of claims 1 to 3, further comprising a power supply control device having the power supply control unit. An information registration device having the communication unit, the information transmission unit, and the power supply control unit is provided.
The in-vehicle system according to any one of claims 1 to 3. The vehicle-mounted system according to any one of claims 1 to 5, wherein the plurality of vehicle-mounted devices are devices having the same hardware configuration. The vehicle-mounted system according to any one of claims 1 to 6, wherein the plurality of vehicle-mounted devices are devices that can be replaced with each other by changing individual information. It is equipped with a processing unit and a communication unit that communicates with a plurality of in-vehicle devices mounted on the vehicle.
The processing unit
The power of the in-vehicle device is turned on in a predetermined order for the plurality of in-vehicle devices.
An in-vehicle information registration device that transmits individual information to be registered to the in-vehicle device to which the communication unit can communicate. It is equipped with a processing unit and a communication unit that communicates with a plurality of in-vehicle devices and power control devices mounted on the vehicle.
The processing unit
Communication is performed to the power control device to instruct the plurality of in-vehicle devices to turn on the power in a predetermined order.
An in-vehicle information registration device that transmits individual information to be registered to the in-vehicle device to which the communication unit can communicate. This is an information registration method for registering individual information for multiple in-vehicle devices mounted on a vehicle.
The power of the in-vehicle device is turned on in a predetermined order for the plurality of in-vehicle devices.
Individual information to be registered is transmitted to the in-vehicle device that has become communicable.
Information registration method.

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