KR20190079335A - Apparatus and method for data synchronization of vehicle black box - Google Patents

Abstract

In a method and device for synchronizing data of a vehicle black box according to one embodiment, an event generated in an asynchronous network system which is widely used in an existing vehicle can be used in a synchronous method, and is capable of securing more clear data on how each ECU was operating in an accident by identifying the order of the event generated in the vehicle, thereby capable of identifying causes before and after the event such as an accident.

Description

[0001] The present invention relates to a data synchronization apparatus and method for a vehicle black box,

An embodiment of the present invention relates to an apparatus and method for synchronizing data in a vehicle black box, and a computer-readable recording medium on which a program for implementing the method is recorded.

A vehicle black box is an automatic recording device of a driving data which is installed in a vehicle and photographs and stores the vehicle around the vehicle in real time. The driving data recorded in this way plays an important role in identifying the cause of an accident.

This black box for vehicles is under construction in some countries such as the United States and Europe, and requires black box installation for some commercial vehicles in Korea. At present, development of a black box for a vehicle is actively under development, and a black box usually includes a mounted camera, a display unit, and a memory.

On the other hand, asynchronous communication such as CAN (Controller Area Network) (hereinafter referred to as CAN), which is frequently used in automobiles, can only know whether an event has occurred or does not have information on when an event has occurred. In addition, due to the priority of each ECU (Electronic Control Unit, hereinafter referred to as "ECU") that has already been set, even if the event occurs first, not only the event output on the network changes during the process of processing the event inside the ECU, When an ECU having a low priority to output data and an ECU having a high priority to output late event data simultaneously attempt to output data on the same network, the network is occupied by the priorities of the respective ECUs rather than after the occurrence of the event. Therefore, it is difficult to receive the data generated on the network and know the event priority in the input order.

In one embodiment, events occurring under the asynchronous network system, which is frequently used in existing automobiles, can be used in a synchronous manner, so that the event of an event occurring in the vehicle can be identified, It is an object of the present invention to provide a data synchronization method and apparatus of a vehicle black box which can acquire clear data and can identify the cause before and after an event such as an accident.

A method of synchronizing data in a vehicle black box according to an embodiment includes: transmitting a reference time from a master ECU to a plurality of slave ECUs; Performing synchronization based on a reference time received at each slave ECU; Collecting event data from each slave ECU; Transmitting the event information including the reference time, the event occurrence time, and the collected event data to the master ECU in each of the slave ECUs; And sorting the event information received from each of the slave ECUs in the master ECU based on the event occurrence time.

The master ECU may be a processor of the vehicle black box.

The master ECU and the plurality of slave ECUs may be connected by CAN (Controller Area Network).

The master ECU may periodically broadcast the reference time to the plurality of slave ECUs.

The sorting step may arrange the event data based on the event occurrence time, taking into consideration the posterior relationship of the event.

The data synchronization apparatus of a black box for a vehicle according to another embodiment includes: a reference time transmission unit for transmitting a reference time to a plurality of slave ECUs; An event data receiving unit for receiving event information including the reference time, the event occurrence time and the event data collected from each slave ECU from each of the slave ECUs; And an event sorting unit for sorting the event information received from each of the slave ECUs based on the event occurrence time.

And a recording medium recording a program for causing a computer to execute a data synchronization method for a vehicle black box according to another embodiment.

The method and apparatus for synchronizing data of a vehicle black box according to an exemplary embodiment can synchronize events generated in an asynchronous network system, which is frequently used in an automobile, to determine the event of an event occurring in the vehicle, You can get clearer data on how the ECUs were operating, and you can figure out the causes before and after events such as accidents.

1 is an exemplary view including a black box for a vehicle.
2 is a system 100 including a data synchronization device 110 for a vehicle black box according to one embodiment.
3 is a schematic diagram of the data synchronization device 110 of the vehicle black box shown in Fig.
4 is a flowchart illustrating a data synchronization method for a vehicle black box according to another embodiment of the present invention.
FIG. 5 is an exemplary diagram for explaining sorting of event data according to another embodiment.

The terms used in this specification will be briefly described and the present invention will be described in detail.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements as well, without departing from the spirit or scope of the present invention. Also, the terms "part," " module, "and the like described in the specification mean units for processing at least one function or operation, which may be implemented in hardware or software or a combination of hardware and software .

1 is an exemplary view including a black box for a vehicle.

The vehicle black box can photograph the outside of the vehicle. The driver of the vehicle can acquire information on another vehicle that is running in front of the vehicle through the vehicle external image photographed by the image processing apparatus. The vehicle black box can acquire sensing information on the state of the vehicle and the surrounding environment of the vehicle while photographing the outside of the vehicle. Here, the sensing information on the state of the vehicle may include information such as whether or not an impact has been applied to the vehicle. In addition, the sensing information on the state of the surrounding environment of the vehicle may include information such as noise, pressure, and the like around the vehicle. The black box can select a section in which a predetermined event is generated in the vehicle exterior image obtained based on the sensing information. Here, the predetermined event may include an event in which noise of a certain level dB or more occurs in the vicinity of the vehicle, an event in which an impact of a certain magnitude or more is applied to the vehicle, and the like, but the present invention is not limited thereto. In addition, when a predetermined event is generated, the black box can capture an image of the front of the vehicle by setting the shooting resolution to a high resolution for a critical time from the time when the event is generated.

In the embodiment, the black box is described as an example, but the present invention is not limited to the black box but should be construed as including an event data recorder (hereinafter referred to as EDR). EDR is a device used in automobile. It is a device that removes recording function from black box. It records various information of automobile such as impact speed, brake operation, belt wearing, airbag deployment information. Conventional EDR utilizes some functions of an airbag electronic control unit (ECU). The main function is to deploy the airbag at the optimum time by sensing the amount of impact, and recording the data before and after the collision when the secondary function collides. In recent years, the engine and vehicle speed, throttle position, brake switch ON / OFF state and so on are also recorded. With the development of memory technology, items to be recorded are gradually increasing. These sensor data, in each of the ECUs, collect the data and transmit it to the EDR via CAN. CAN is an asynchronous communication method that only knows whether an event has occurred and does not have information on when the event occurred. In addition, due to the priority of each ECU (Electronic Control Unit, hereinafter referred to as "ECU") that has already been set, even if the event occurs first, not only the event output on the network changes during the process of processing the event inside the ECU, When an ECU having a low priority to output data and an ECU having a high priority to output late event data simultaneously attempt to output data on the same network, the network is occupied by the priorities of the respective ECUs rather than after the occurrence of the event.

2 is a system 100 including a data synchronization device 110 for a vehicle black box according to one embodiment. Here, the data synchronization apparatus 110 and the master ECU shown in FIG. 2 should be interpreted in the same sense, and the data synchronization apparatus 110 or the master ECU 110 may be a processor of a vehicle black box or EDR.

Referring to FIG. 2, master ECU 110 and a plurality of slave ECUs 120 to 140 are connected to each other through CAN in the entire system 100. CAN can provide an economical and reliable network for multiple CAN devices to communicate with each other. The advantage of the network is that electronic control units (ECUs) have a single CAN interface, rather than having analog and digital inputs for each device in the system, thereby reducing the overall cost and weight of the vehicle. Each device on the network has a CAN controller chip that is very intelligent and allows all devices on the network to see all the messages being transmitted. Each device determines whether the message is relevant or filtered and all messages are prioritized, so if two nodes send a message at the same time, the higher priority message is sent first and the lower priority message is sent Can be postponed.

Master ECU 110 transmits a reference time from the slave ECUs 120 to 140 to the slave ECUs 120 to 140. The reference time, And receives event information including event data. The master ECU 110 sorts the received event information based on the event occurrence time. Here, master ECU 110 may be an ECU of black box or EDR.

The first slave ECU 120 to the Nth slave ECU 140 may be devices provided in the vehicle, respectively, and may be ECUs that control the airbag, the camera, the engine, and the vehicle speed, the throttle position, However, the present invention is not limited thereto.

The first to Nth slave ECUs 120 to 140 periodically receive the reference time from the master ECU and synchronize the respective ECUs. Then, the first to Nth slave ECUs 120 to 140 collect the event occurrence time and event data, and transmit event information including the event occurrence time and the event data to the master ECU 110 based on the reference time.

3 is a schematic diagram of the data synchronization device 110 of the vehicle black box shown in Fig.

3, the data synchronization apparatus 110 includes a control unit 111, a reference time transmission unit 112, an event data reception unit 113, and an event arrangement unit 114.

The control unit 111 controls the overall operation of the data synchronization apparatus 110.

The reference time transmission unit 112 transmits a reference time to a plurality of slave ECUs. The reference time transmission unit 112 may periodically broadcast the reference time. For example, the reference time can be broadcast in intervals of several minutes to several hours.

The event data receiving unit 113 receives event information including a reference time, an event occurrence time, and event data collected from each slave ECU from each slave ECU. Here, the event data may include, but is not limited to, airbag operation, camera shot image, engine and vehicle speed, throttle position, brake switch ON / OFF state, and the like. Also, by receiving the event occurrence time based on the reference time, the occurrence relationship of each event can be grasped. For example, in addition to the reference time, the event occurrence time can be received.

The event sorting unit 114 sorts the event information received from each slave ECU based on the event occurrence time. 5, event data corresponding to the impact detection is received from the first slave ECU (shock sensor) at 15: 30: 20 seconds, and from the second slave ECU (camera sensor) at 15:30:15 , And receives event data corresponding to the rapid break operation at 15: 30: 18 seconds from the third slave ECU (brake sensor). In this case, the event sorting unit 114 may sort the event according to the posterior relationship of the event based on the event occurrence time at the reference time as follows.

By recognizing front object detection, rapid braking operation, and impact detection, it is possible to grasp the responsibility of the occurrence of an accident and the subsequent relationship. In addition, the transmission and reception of event data can transmit and receive the reference time, the event occurrence time, and the event data according to the data transmission frame of the CAN interface.

4 is a flowchart illustrating a data synchronization method for a vehicle black box according to another embodiment of the present invention.

Referring to FIG. 4, in step 400, master ECU periodically transmits a reference time to a plurality of slave ECUs. In step 402, synchronization is performed based on the reference time received at each slave ECU. In step 404, event data is collected from each of the slave ECUs. In step 406, each slave ECU transmits event information including a reference time, an event occurrence time, and event data to the master ECU. In step 408, the master ECU sorts the event information received from each slave ECU based on the event occurrence time.

The data synchronization apparatus and method according to the embodiment can synchronize events generated in an asynchronous network system, which is frequently used in existing automobiles, to determine the event of an event occurring in the vehicle, You can get clearer data about what happened and what causes the events before and after events such as accidents.

An apparatus according to one embodiment includes a processor, a memory for storing and executing program data, a permanent storage such as a disk drive, a communication port for communicating with an external device, a user such as a touch panel, a key, Interface devices, and the like. Methods implemented with software modules or algorithms may be stored on a computer readable recording medium as computer readable codes or program instructions executable on the processor. Here, the computer-readable recording medium may be a magnetic storage medium such as a read-only memory (ROM), a random-access memory (RAM), a floppy disk, a hard disk, ), And a DVD (Digital Versatile Disc). The computer-readable recording medium may be distributed over networked computer systems so that computer readable code can be stored and executed in a distributed manner. The medium is readable by a computer, stored in a memory, and executable on a processor.

Although specific reference numerals are used in the embodiments shown in the drawings to describe the embodiments, the present invention is not limited to the specific terminology, and the embodiments can be applied to any configuration ≪ / RTI >

Embodiments may be represented by functional block configurations and various processing steps. These functional blocks may be implemented in a wide variety of hardware and / or software configurations that perform particular functions. For example, embodiments may include integrated circuit components such as memory, processing, logic, look-up tables, etc., that may perform various functions by control of one or more microprocessors or other control devices Can be employed. Similar to the components of the present invention may be implemented with software programming or software components, embodiments may include various algorithms implemented in a combination of data structures, processes, routines, or other programming constructs, such as C, C ++ , Java (Java), assembler, and the like. Functional aspects may be implemented with algorithms running on one or more processors. The embodiments may also employ conventional techniques for electronic configuration, signal processing, and / or data processing. Terms such as "mechanism", "element", "means", "configuration" may be used broadly and are not limited to mechanical and physical configurations. The term may include the meaning of a series of routines of software in conjunction with a processor or the like.

The specific implementations described in the embodiments are, by way of example, not intended to limit the scope of the embodiments in any way. For brevity of description, descriptions of conventional electronic configurations, control systems, software, and other functional aspects of such systems may be omitted. Also, the connections or connecting members of the lines between the components shown in the figures are illustrative of functional connections and / or physical or circuit connections, which may be replaced or additionally provided by a variety of functional connections, physical Connection, or circuit connections. Also, unless explicitly mentioned, such as "essential "," importantly ", etc., it may not be a necessary component for application of the present invention.

The use of the terms "above" and similar indication words in the description of the embodiments (in particular in the claims) may refer to both singular and plural. In addition, in the embodiment, when a range is described, it includes the invention to which the individual values belonging to the above range are applied (if there is no description to the contrary), the individual values constituting the above range are described in the detailed description . Finally, the steps may be performed in an appropriate order, unless explicitly stated or contrary to the description of the steps constituting the method according to the embodiment. The embodiments are not necessarily limited to the description order of the steps. The use of all examples or exemplary terms (e.g., etc.) in the examples is for the purpose of describing the embodiments in detail and is not intended to be limited by the scope of the claims, It is not. It will also be appreciated by those skilled in the art that various modifications, combinations, and alterations may be made depending on design criteria and factors within the scope of the appended claims or equivalents thereof.

Claims (6)

Transmitting a reference time from the master ECU to the plurality of slave ECUs;
Performing synchronization based on a reference time received at each slave ECU;
Collecting event data from each slave ECU;
Transmitting the event information including the reference time, the event occurrence time, and the collected event data to the master ECU in each of the slave ECUs; And
And sorting the event information received from each of the slave ECUs in the master ECU based on the event occurrence time. The method according to claim 1,
Wherein the master ECU is a processor of the vehicle black box. The method according to claim 1,
Wherein said master ECU and said plurality of slave ECUs are connected by CAN (Controller Area Network). The method according to claim 1,
And the master ECU periodically broadcasts the reference time to the plurality of slave ECUs. A reference time transmission unit for transmitting a reference time to a plurality of slave ECUs;
An event data receiving unit for receiving event information including the reference time, the event occurrence time and the event data collected from each slave ECU from each of the slave ECUs; And
And an event arrangement unit arranged to sort the event information received from each of the slave ECUs based on the event occurrence time. A recording medium on which a program for causing a computer to execute the method of any one of claims 1 to 4 is recorded.

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