KR101584210B1 - System and method for monitoring MCU - Google Patents

Abstract

The present invention relates to an integrated microcontroller unit (MCU) monitoring system and a method therefor. The integrated MCU monitoring system comprises: a plurality of MCUs for controlling a vehicle; a plurality of controllers including the MCUs; and an integrated MCU monitoring device for integrally monitoring the malfunction in the controllers and the MCUs through near-field communications. Therefore, the integrated MCU monitoring system monitors the controllers and the MCUs in an integrated manner.

Description

{System and method for monitoring MCU}

The present invention relates to an integrated monitoring system and method for an MCU, including a plurality of MCUs (Micro Controller Units) for controlling a vehicle, a plurality of controllers including the plurality of MCUs, a plurality of controllers And more particularly to an MCU integrated monitoring system and method for integrally monitoring a plurality of controllers and a plurality of MCUs, including an MCU integrated monitoring device for monitoring the operation abnormality of the MCU.

MCU (Micro Controller Unit) and watchdog are used to control the vehicle. Watchdogs are used to detect and repair computer malfunctions. A typical watchdog will simply operate in one way, so monitoring a core MCU as a watchdog in the controller is not reliable enough .

Accordingly, a new MCU integrated monitoring system for monitoring a plurality of controllers and a plurality of MCUs through a local area network is required.

The present invention has been invented based on such a technical background and has been invented to provide additional technical elements which can not easily be invented by a person having ordinary skill in the art, as well as satisfying the technical requirements of the present invention.

Korea Patent Publication No. 2013-0009086

The present invention monitors MCUs integrally using short-distance communication (in particular, CAN communication), unlike existing controllers and MCUs, and monitors MCUs connected to buses in a single MCU integrated monitoring device And to implement an integrated surveillance system that can be monitored through surveillance methods.

The technical problem to be solved by the present invention is not limited to the technical problems mentioned above, and various technical problems can be included within the scope of what is obvious to the ordinary skilled in the art from the following description.

According to an aspect of the present invention, there is provided an integrated monitoring system for an MCU, comprising: a plurality of microcontroller units (MCU) for controlling a vehicle; A plurality of controllers including the plurality of MCUs; And an MCU integrated monitoring device for monitoring whether or not the plurality of controllers and the plurality of MCUs are operated in an integrated manner through short-range communication, wherein the short range communication is a CAN (Controller Area Network) communication protocol .

In the MCU integrated monitoring system according to an embodiment of the present invention, the MCU integrated monitoring apparatus selects a monitoring target among the plurality of controllers and the plurality of MCUs, and selects a monitoring method to monitor the selected monitoring method The selected controller and the MCU receive the monitoring method, and data suitable for the monitoring method is transmitted to the MCU integrated monitoring apparatus.

In this case, the MCU integrated monitoring system according to an embodiment of the present invention determines that there is no abnormality in the operation of the selected controller and the selected MCU when the received data match, The controller, and the plurality of MCUs. Also, the MCU integrated monitoring system according to an embodiment of the present invention may determine that there is an error in the operation of the selected controller and the selected MCU when the received data in the MCU integrated monitoring apparatus do not match, And generates a reset signal to the selected MCU.

In the MCU integrated monitoring system according to an embodiment of the present invention, when the MCU integrated monitoring apparatus selects a monitored object among the plurality of controllers and the plurality of MCUs, it is determined in a random order, Is selected in a random order when selecting a method of monitoring the monitored object.

In addition, in the MCU integrated monitoring system according to the embodiment of the present invention, a method for monitoring the monitored object is performed by transmitting the data after the MCU integrated monitoring device encrypts data to be transmitted to the selected MCU, And the MCU integrated monitoring device monitors the operation of the selected controller and the selected MCU based on the retransmitted data based on the decoded data received from the integrated monitoring device and retransmits the decrypted data. do.

Also, in the MCU integrated monitoring system according to an embodiment of the present invention, a method of monitoring the monitored object may include monitoring whether the selected controller and the selected MCU are abnormal or not, periodically transmitting signals to the MCU integrated monitoring apparatus And a method of monitoring the monitored object is characterized in that the MCU integrated monitoring apparatus monitors whether the selected controller and the selected MCU have an operation abnormality by using a query response method using a lookup table.

Meanwhile, in the MCU integrated monitoring system according to an embodiment of the present invention, when any one of the plurality of controllers and the plurality of MCUs detects an error of data and transmits the content of the error, And generates a reset signal to the failed controller and the MCU. When the MCU integrated monitoring device senses a data fault and transmits the contents, either one of the plurality of controllers and the plurality of MCUs transmits an error The content is processed and the short-range communication is interrupted.

According to another aspect of the present invention, there is provided an integrated monitoring method for an MCU, including: (a) selecting an object to be monitored among a plurality of controllers and a plurality of MCUs; (b) selecting a method by which the MCU integrated monitoring device monitors the monitored object; (c) transmitting the monitoring method to the MCU and the controller, which are the monitored targets, by the MCU integrated monitoring device; (d) receiving the monitoring method from the selected controller and the MCU, and transmitting data suitable for the monitoring method to the MCU integrated monitoring device; And a control unit.

According to still another aspect of the present invention, there is provided an integrated monitoring method for an MCU, comprising: (e1) the integrated monitoring device for the MCU determines that there is no abnormality in operation of the selected controller and the selected MCU when the received data match, A controller and a plurality of MCUs; (E2) the MCU integrated monitoring device determines that there is an operation error in the selected controller and the selected MCU if the received data do not match, and generates a reset signal in the selected controller and the selected MCU ; And further comprising:

At this time, in the MCU integration monitoring method according to an embodiment of the present invention, in the step (a), when the MCU integrated monitoring apparatus selects monitoring targets among the plurality of controllers and the plurality of MCUs, And the step (b) is determined in a random order when the MCU integrated monitoring device selects a method of monitoring the monitored object.

In the method of monitoring an MCU according to an embodiment of the present invention, a method for monitoring the monitored object may include transmitting data after the MCU integrated monitoring device encrypts data to be transmitted to the selected MCU, And the MCU integrated monitoring device monitors the operation of the selected controller and the selected MCU based on the retransmitted data based on the decoded data received from the integrated monitoring device and retransmits the decrypted data. do.

According to another aspect of the present invention, there is provided a method for monitoring an object to be monitored, the method comprising the steps of: monitoring the selected controller and the selected MCU, And a method of monitoring the monitored object is characterized in that the MCU integrated monitoring apparatus monitors whether the selected controller and the selected MCU have an operation abnormality by using a query response method using a lookup table.

According to another aspect of the present invention, there is provided an integrated monitoring method for an MCU, including: (a) detecting a data fault and transmitting an error content to one of a plurality of controllers and a plurality of MCUs; (b) the MCU integrated monitoring device processes the error content; (c) generating a reset signal to the controller and the MCU in which the MCU integrated monitoring apparatus has failed; And the short-range communication is interrupted after the step (c) processes the error content.

In the present invention, the MCU and the controller are integrated and monitored separately from the method of monitoring the MCU and the controller, so that a plurality of MCUs and controllers can be monitored by one monitoring device.

Further, the present invention can be carried out when a plurality of MCUs and a plurality of controllers corresponding to a monitoring object are randomly selected, and when there is no abnormality, another MCU or a controller is randomly selected to sequentially monitor the MCU or the controller You can avoid unexpected errors.

In addition, the present invention makes it possible to set various monitoring methods such as encryption and decryption between the MCU integrated monitoring device and the controller / MCU, periodic signal transmission by the MCU integrated monitoring device, and a query response method using a lookup table Reliability can be improved, and even a fault occurring in each of the MCU and the controller is managed to determine the presence or absence of an abnormal operation, thereby preventing an abnormal operation in advance.

1 is an exemplary diagram illustrating an MCU integrated monitoring system according to an embodiment of the present invention.
2 is a flowchart illustrating an MCU integration monitoring method according to an embodiment of the present invention.
3 is a flowchart illustrating an MCU integration monitoring method according to an embodiment of the present invention.

Hereinafter, the 'MCU integrated monitoring system and method' according to the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the scope of the present invention. In addition, the matters described in the attached drawings may be different from those actually implemented by the schematic drawings to easily describe the embodiments of the present invention.

In the meantime, each constituent unit described below is only an example for implementing the present invention. Thus, in other implementations of the present invention, other components may be used without departing from the spirit and scope of the present invention. In addition, each component may be implemented solely by hardware or software configuration, but may be implemented by a combination of various hardware and software configurations performing the same function. Also, two or more components may be implemented together by one hardware or software.

Also, the expression " comprising " is intended to merely denote that such elements are present as an expression of " open ", and should not be understood to exclude additional elements.

Also, the expressions such as 'first, second', etc. are used only to distinguish between plural configurations, and do not limit the order or other features among the configurations.

Meanwhile, the 'MCU integrated monitoring method' according to an embodiment of the present invention described above may include substantially the same technical features as the 'MCU integrated monitoring system' according to an embodiment of the present invention, although the categories are different .

Therefore, although not described in detail in order to prevent duplication, the above-described features related to the 'MCU integrated monitoring system' can be analogously applied to the 'MCU integrated monitoring method' according to an embodiment. Conversely, the above-described features related to the 'MCU integrated monitoring method' can be analogously applied to the 'MCU integrated monitoring system' as well.

Hereinafter, an MCU integrated monitoring system according to an embodiment of the present invention will be described with reference to FIG. 1 and FIG.

1, an integrated monitoring system for an MCU according to an exemplary embodiment of the present invention includes a plurality of MCUs 110 for controlling a vehicle, a plurality of controllers 120 including the plurality of MCUs, And an MCU integrated monitoring device 130 for monitoring the operation of the plurality of controllers and the plurality of MCUs in an integrated manner.

In this case, the short-range communication 140 may be performed in a CAN (Controller Area Network) communication, which is a communication standard protocol for vehicle diagnosis, or may be conducted in a short-range wireless communication method. CAN communication is a standard communication standard designed for communication between microcontrollers or devices without a host computer in the vehicle. It is used in industrial automation equipment and medical equipment as well as in vehicles.

A plurality of MCUs 110, a plurality of controllers 120 and an MCU integrated monitoring device 130 are connected to a CAN data bus system and nodes can be connected to CAN-low wiring and CAN-high wiring to transmit and receive data. have.

On the other hand, the MCU integrated monitoring apparatus is connected to a plurality of controllers and a plurality of MCUs, and monitors the presence or absence of an operation abnormality. First, the MCU integrated monitoring apparatus selects a monitoring target among a plurality of controllers and a plurality of MCUs, and selects a monitoring target method, and transmits the selected monitoring method to the selected monitoring target controller and the MCU.

When selecting one of a plurality of monitoring targets and a plurality of monitoring methods, the MCU integrated monitoring apparatus is set in a random order. The advantages of each of the plurality of methods can be utilized and a random error to be caused when the MCU or the controller is sequentially monitored can be prevented by randomly selecting an object to be monitored.

At this time, a method of monitoring a monitored object can be monitored by encrypting and decrypting the data, periodically monitoring the signal while transmitting the signal, or using a query response method using a lookup table.

A method of monitoring an object to be monitored by an MCU integrated monitoring device includes the steps of encrypting and transmitting data to be transmitted to an MCU selected by the MCU integrated monitoring device and decrypting and decrypting encrypted data received from the MCU integrated monitoring device, And one data is retransmitted. Then, the MCU integrated monitoring apparatus can monitor whether the selected controller and the selected MCU are abnormal based on the retransmitted data.

Encryption in the monitoring device and decryption in the MCU can prevent the data transmitted from the MCU integrated monitoring device from being lost or changed, and it is possible to accurately check whether the control command of the monitoring device is correctly transmitted. The encrypted data is retransmitted by the MCU through decryption, and the MCU integrated monitoring device compares the received data and monitors whether or not the received data matches with the correct data. At this time, a secret key encryption scheme may be used in decoding, or a public key encryption scheme may be used. In addition, a symmetric encryption scheme having the same encryption key and a decryption key may be used, or an asymmetric encryption scheme having a different encryption key and a decryption key may be used.

In addition, a method of monitoring an object to be monitored by an MCU integrated monitoring apparatus can monitor whether a selected controller and a selected MCU are abnormal in operation while the MCU integrated monitoring apparatus periodically transmits a signal. It is possible to generate a reset signal to the controller and the MCU in which the MCU integrated monitoring apparatus has an error within a predetermined time to process an operation abnormality even if an operation abnormality occurs in the selected controller and the selected MCU.

In addition, in the method of monitoring an object to be monitored by the MCU integrated monitoring device, the integrated monitoring device of the MCU can monitor the selected controller and the selected MCU for abnormal operation using a query response method using a lookup table.

A lookup table is an array of data structures used to replace runtime calculations with a simpler array indexing process. It uses a method to check that the input values are valid while matching a set of value items in the array, It is confirmed whether the values of the data transmitted and received by the monitoring apparatus, the MCU, and the controller are valid.

The controller and the MCU selected by the MCU integrated monitoring device receive the monitoring method and send the data suitable for the monitoring method to the MCU integrated monitoring device. The MCU integrated monitoring device compares the received data with preset normal data, and determines whether or not the received data matches the normal data to determine whether there is an operation abnormality.

When the received data match, the MCU integrated monitoring apparatus determines that there is no abnormality in the operation of the selected controller and the selected MCU, and performs the monitoring operation of another controller and the MCU by selecting again the monitored object among the plurality of controllers and the plurality of MCUs do.

In addition, the MCU integrated monitoring apparatus judges that the selected controller and the selected MCU have an operation abnormality when the received data is inconsistent, and generates a reset signal to the selected controller and the selected MCU, thereby handling the operation abnormality.

On the other hand, the integrated monitoring device of the MCU can integrally manage faults occurring in the MCU and the controller, and can integrally manage the faults. When any one of the plurality of controllers and the plurality of MCUs detects a data fault and transmits the content of the error, the MCU integrated management apparatus processes the error content and generates a reset signal to the controller and the MCU in which the error occurred, And the error occurrence of the controller.

In addition, the MCU integrated monitoring apparatus processes a content of an error and intercepts the short-range communication when any one of the plurality of controllers and the plurality of MCUs detects a data fault and transmits contents, And the like.

2 is a flowchart illustrating an MCU integration monitoring method according to an embodiment of the present invention.

Referring to FIG. 2, an MCU integrated monitoring method according to an exemplary embodiment of the present invention may include a step S210 of randomly selecting an object to be monitored among a plurality of controllers and a plurality of MCUs .

The MCU integration monitoring method according to an embodiment of the present invention may further include a step S220 of selecting, at step S210, a method of monitoring an object to be monitored by the MCU integrated monitoring device at step S220, And transmitting the monitoring method to the MCU and the target controller (S230).

In addition, the MCU integration monitoring method according to an exemplary embodiment of the present invention may include a step S240 of receiving the monitoring method and transmitting data suitable for the monitoring method to the MCU integrated monitoring device.

The MCU integrated monitoring apparatus compares the received data with predetermined normal data (S250), and determines whether or not the data match and determines whether there is an operation abnormality.

When the received data match, the MCU integrated monitoring apparatus judges that there is no operation abnormality (S251) of the selected controller and the selected MCU, reselects the monitoring target among the plurality of controllers and the plurality of MCUs, .

In addition, the MCU integrated monitoring apparatus judges that there is an operation error (S252) of the selected controller and the selected MCU when the received data do not match, and processes the operation error by generating a reset signal to the selected controller and the selected MCU.

3 is a flowchart illustrating an MCU integration monitoring method according to an embodiment of the present invention.

Referring to FIG. 3, in the integrated monitoring method of an MCU according to an embodiment of the present invention, the MCU integrated management apparatus detects (S310) a data fault in one of a plurality of controllers and a plurality of MCUs, (Step S320).

Then, the MCU integrated management apparatus processes the transmitted error information (S330) and generates a reset signal to the controller and the MCU in which the error occurred (S340), thereby handling the error occurrence of the MCU and the controller.

In addition, the MCU integrated monitoring apparatus processes the error content and intercepts the short-range communication when any of the plurality of controllers and the plurality of MCUs detects a data fault and transmits contents thereof (S341) It can also handle errors in the MCU and controller.

The embodiments of the present invention described above are disclosed for the purpose of illustration, and the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention.

110: Multiple MCU
120: a plurality of controllers
130: MCU integrated monitoring device
140: Local area communication

Claims (24)

A plurality of MCUs (Micro Controller Units) for controlling the vehicle;
A plurality of controllers including the plurality of MCUs;
An MCU integrated monitoring device for monitoring the operation abnormality of the plurality of controllers and the plurality of MCUs integrally through short-range communication;
Lt; / RTI >
The MCU integrated monitoring apparatus includes:
Selecting one of the plurality of controllers and the plurality of MCUs as a monitoring target, selecting one of the plurality of monitoring methods, monitoring the selected controller and the MCU by the selected monitoring method,
Determining whether there is an abnormality in the operation of the selected controller and the selected MCU by comparing the data received from the selected controller and the MCU with predetermined data,
The plurality of monitoring methods may include:
A method for monitoring and encrypting data, and a query response method using a lookup table.
The method according to claim 1,
The short-
(CAN) communication, which is a communication standard protocol for vehicle diagnosis.
delete The method according to claim 1,
The MCU integrated monitoring apparatus includes:
Wherein the control unit determines that there is no abnormality in the operation of the selected controller and the selected MCU when the received data coincides with the preset data and selects the monitored object among the plurality of controllers and the plurality of MCUs again MCU integrated monitoring system.
The method according to claim 1,
The MCU integrated monitoring apparatus includes:
Wherein the controller determines that there is an error in the operation of the selected controller and the selected MCU and generates a reset signal to the selected controller and the selected MCU if the received data does not match the preset data, system.
The method according to claim 1,
The MCU integrated monitoring apparatus includes:
Wherein the MCUs are selected in a random order when selecting a monitoring target among the plurality of controllers and the plurality of MCUs.
The method according to claim 1,
The MCU integrated monitoring apparatus includes:
And selects a method for monitoring the monitoring target in a random order.
delete delete delete delete The method according to claim 1,
The MCU integrated monitoring apparatus includes:
And wherein when any one of the plurality of controllers and the plurality of MCUs detects an error in data and transmits the contents of the error, the controller processes the error content and generates a reset signal to the controller and the MCU in which the error occurred, system.
The method according to claim 1,
The MCU integrated monitoring apparatus includes:
Wherein when any one of the plurality of controllers and the plurality of MCUs detects a data fault and transmits the contents, the MCU monitors the error content and blocks the short-range communication.
(a) the MCU integrated monitoring apparatus selecting any one of a plurality of controllers and a plurality of MCUs as objects to be monitored;
(b) the MCU integrated monitoring apparatus selecting one of a plurality of monitoring methods as a method of monitoring the monitored object;
(c) transmitting data by the monitoring method selected by the MCU and the controller to which the MCU integrated monitoring device is selected;
(d) the selected controller and the MCU receive the data and transmit data corresponding to the received data to the MCU integrated monitoring device;
, ≪ / RTI &
The plurality of monitoring methods may include:
A method for monitoring and encrypting data, and a query response method using a lookup table.
delete delete 15. The method of claim 14,
The step (a)
Wherein the MCU integrated monitoring device is set in a random order when selecting a monitoring target among the plurality of controllers and the plurality of MCUs.
15. The method of claim 14,
The step (b)
Wherein the MCU integrated monitoring device is arranged in a random order when the MCU integrated monitoring device selects a method of monitoring the monitored object.
delete delete delete delete delete delete

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