EP3458968A1 - Reseau multiplexe avec gestion de perte de trame d'etat - Google Patents
Reseau multiplexe avec gestion de perte de trame d'etatInfo
- Publication number
- EP3458968A1 EP3458968A1 EP17729515.1A EP17729515A EP3458968A1 EP 3458968 A1 EP3458968 A1 EP 3458968A1 EP 17729515 A EP17729515 A EP 17729515A EP 3458968 A1 EP3458968 A1 EP 3458968A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- state
- network
- slave
- power failure
- management
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000004590 computer program Methods 0.000 claims abstract description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 230000002618 waking effect Effects 0.000 claims description 3
- 210000000056 organ Anatomy 0.000 description 28
- 238000004891 communication Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
Definitions
- the invention relates to the field of multiplexed networks, including networks used in industrial installations and in automobiles. These can include networks such as CAN (acronym for "Controller Area Network”) or LIN (acronym for "Local Interconnected Network”).
- networks such as CAN (acronym for "Controller Area Network") or LIN (acronym for "Local Interconnected Network”).
- ра ⁇ н ⁇ е как ⁇ ии are connected to each other by a connection bus.
- These organs comprise a management organ, or master organ, which determines the finite state of the other organs, called slave organs.
- Finite state means the states relating to a life phase of the organs, such as in particular a normal operating state and a standby state.
- This status command is operated by control frames on the network bus. But in case of network failure, these frames no longer circulate.
- the organs other than the master member then no longer receive the state control frame of said organs. In the absence of reception of this frame, some of these bodies see their power off, which can cause functional failures, such as in particular the loss of data and / or actuator immobilized in a non-nominal position. It may be a wiper immobilized in the middle of the windshield.
- the published patent document FR 2852 755 A1 relates to a state management system of a multiplexed network.
- a master device transmits status frames defining the status of the slave members among standby states, wake up, normal operation, standby or communication stop on the network. It provides that at least one of the slave organs can enter degraded operating mode in case of non-reception of the state frame.
- It can be self-powered (type 1), that is to say, which continue to operate in the absence of a state control frame, as well as of the power-off type ( type 3), that is to say which are electrically powered by the master member according to the state of the bus ,.
- the degraded mode is however not detailed in this teaching.
- this type of cut-off device goes into standby mode when the bus power disappears. This teaching did not foresee a situation where this type of organ can be in a faulty configuration during its forced standby.
- the invention aims to overcome at least one of the disadvantages of the state of the art mentioned above. More particularly, the invention aims to limit failures of certain members of a multiplex network in the event of a network failure.
- the subject of the invention is a method for managing a multiplexed network, in particular for a motor vehicle, the network comprising a management member and at least one slave member electrically powered according to the state of the network and having a finite state, one of a normal operating state and a standby state is controlled by a status control frame transmitted by the management unit; characterized in that the method comprises the following steps: detection of imminent failure of the network supply; and, in the presence of said detection, passage for the slave member to a state of preparation for a power failure of said member.
- the state of preparation for a power failure includes a data backup of the organ.
- the state of preparation for a power failure comprises positioning in the neutral position of one or more actuators controlled by the member.
- the state of preparation for a power failure comprises displaying on a functional body of the screen type information relating to said cut.
- the imminent failure detection of the power supply of the network corresponds to a loss of reception by the functional element of the state control frame.
- the transition to the state of preparation for a power failure occurs after a loss of reception by the slave member of the state control frame for a period of time greater than a predetermined value, said predetermined value being preferentially greater than 0.3 seconds and / or less than 5 seconds.
- the finished state of the or at least one of the slave members further comprises a state of standby and an alarm state.
- the network is of the CAN, LIN or LVDS Bidir type.
- the invention also relates to a computer program comprising program code instructions for executing the steps of the method according to the invention when said program is executed on a computer.
- the computer is advantageously part of the vehicle management system.
- the invention also relates to a motor vehicle comprising a network multiplexed with a management member and at least one slave member powered electrically according to the state of the network and having a finite state, among a normal operating state and a state standby, is controlled by a status control frame issued by the management unit; remarkable in that said network is configured to execute the method according to the invention
- the measurements of the invention are interesting in that they make it possible to avoid sudden shutdowns of slave devices in the event of network failure. The consequences of the network failure are thus minimized.
- FIG. 1 schematically represents the architecture of a multiplexed network according to the invention
- FIG. 2 is a state graph of an organ of the network according to the invention.
- FIG. 3 is an operating diagram of an organ of the network according to the invention.
- Figure 1 schematically illustrates a multiplex network according to the invention.
- the network 2 comprises a management member 4, called master (“manager”), connected to slave members 6 by a communication bus 8.
- Each of the management member and the slave members comprises an electronic control unit (ECU1 , ECU2, ECUn, where ECU is the acronym of "Electronic Control Unit") of the microcontroller type able to manage a binary communication with the other organs via the communication bus 8.
- the communication bus can be of the CAN type (acronym for "Controller Area Network"), LIN (acronym for "Local Interconnected Network”) or LVDS Bidir (acronym for "Low Voltage Differential Signaling Bidirectional").
- the management member 4 is master and the slave members in that the management member 4 determines the state of the slave members 6. To do this, it sends status frames on the network, these frames being received by the organs and determining the state of life phase that these organs must take.
- these states one can count a normal state of operation and a state in standby. These states can also have a sleep state and wake state.
- the slave organs some may be of a first type with a permanent power supply and others of a second type with a switched power supply.
- the organ or organs of the first type are electrically powered permanently, regardless of the state of the network. These can be organs for security functions that must always be insured.
- the body or bodies of the second type are electrically powered according to the state of the network by the master member. This means that, in the event of a network failure, they may no longer be powered and therefore shut down.
- Figure 2 is a state graph of an organ of the second type, according to the invention.
- the normal state (NORMAL) can be reached in particular following the power supply of the body via the network. From this state 10, it can go to a state of standby 12 (GO_TO_SLEEP) following the reception of a corresponding frame sent by the management unit (4, Figure 1). Still from this normal state 10 the member can also go to a state of preparation for a power failure 14 (LIMP_HOME_MODE) following a loss of reception by the member in question of the control frame issued by the management body (4, Figure 1).
- This state can comprise various actions, such as in particular that of storing the data during processing and / or the control of one or more actuators towards one or more neutral or nominal positions. For example, this may be the storage of the destination data entered in a GPS navigation system. It may also be the movement of one or more window wipers towards one or more nominal positions where they do not interfere with the driver's view.
- the loss of reception of the state frame by the slave organs or the second type is indeed heralding a network failure and, therefore, an imminent power failure.
- HEADER a first field sent by the master to a slave
- RESPONSE a second field, called RESPONSE, is sent by the data producer (the master in the case of a control frame and the slave in the case of a state frame).
- the master knows the slaves on the network using configuration data. He therefore knows which slaves are normally present on the network. So when the master sends the HEADER of a state frame and the slave does not produce the RESPONSE field, the master increments a counter. When the counter has reached a maximum value, the slave in question is declared absent on detection of absence of receipt of state frame.
- the transition to the state of preparation for a power failure can also include the display on a functional organ, of the screen type, of information relating to said cut.
- FIG. 3 is a logic diagram expressing the logic of operation of an organ of the second type according to the states of the graph of FIG. 2. It comprises a first step 16 of verification of reception of the state frame (COMMANDE_PHASE_VIE). In case of reception of this frame, this one is detected in steps 18 and 22 to then go to the state corresponding to steps 20 and 24, respectively.
- the operating logic also comprises a step 26 for checking the absence of reception of the state frame LIFE_PHASE_CON for a period of time greater than a predetermined value To and, when this condition is fulfilled, a step 28 of passage for the organ goes to the state LIMP_HOME_MODE preparing for a power failure.
- the To value can be between 0.3 and 5 seconds.
- the organ remains in its initial state or goes to another state depending on the received frame.
- This logic operates in a loop so that it can change state at any time, in particular to go into the state of preparation for a power failure.
- Figures 2 and 3 illustrate, except the state of preparation for a power failure, two states NORMAL and GO_TO_SLEEP. It should be noted, however, that other states such as the waking and waking states can also be provided.
- second type devices in a multiplexed network i.e., the switched power type
- these organs can be put in standby state to minimize their power consumption.
- they do not potentially require specific cabling for their power supply.
- the ability for these bodies to move towards the state of preparation for a power failure can limit the negative consequences of the failure of the network, mainly in that the bodies in question prepare their power failure. This avoids the inconvenience of a sudden cut when the bodies in question are de-energized while they are in operation.
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Small-Scale Networks (AREA)
- Quality & Reliability (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1654532A FR3051576B1 (fr) | 2016-05-20 | 2016-05-20 | Reseau multiplexe avec gestion de perte de trame d’etat. |
PCT/FR2017/051201 WO2017198954A1 (fr) | 2016-05-20 | 2017-05-18 | Reseau multiplexe avec gestion de perte de trame d'etat |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3458968A1 true EP3458968A1 (fr) | 2019-03-27 |
Family
ID=56896685
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17729515.1A Withdrawn EP3458968A1 (fr) | 2016-05-20 | 2017-05-18 | Reseau multiplexe avec gestion de perte de trame d'etat |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3458968A1 (fr) |
CN (1) | CN109154928A (fr) |
FR (1) | FR3051576B1 (fr) |
WO (1) | WO2017198954A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3076161B1 (fr) * | 2017-12-21 | 2019-11-15 | Psa Automobiles Sa | Dispositif de supervision de defauts d’organe(s) esclave(s) pour un organe maitre d’un reseau multiplexe. |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4926158A (en) * | 1989-02-01 | 1990-05-15 | Zeigler John R | Powered communication link |
DE19959730A1 (de) * | 1999-12-10 | 2001-06-21 | Siemens Ag | Bussystem |
JP3956694B2 (ja) * | 2001-12-27 | 2007-08-08 | 株式会社デンソー | 車両内情報通信システム及び車載電源制御ユニット |
JP4003062B2 (ja) * | 2002-08-30 | 2007-11-07 | 三菱自動車工業株式会社 | バス方式通信ネットワークにおける通信エラー検出方法 |
FR2852755B1 (fr) * | 2003-03-21 | 2005-06-24 | Peugeot Citroen Automobiles Sa | Systeme de gestion de l'etat d'un reseau multiplexe de transmission d'informations et donc de stations raccordees par celui-ci, notamment pour vehicule automobile |
DE102004008543A1 (de) * | 2004-02-19 | 2005-09-01 | Volkswagen Ag | Verfahren und Vorrichtung zum Netzmanagement für Steuergeräte |
FR2934828B1 (fr) * | 2008-08-11 | 2010-12-10 | Peugeot Citroen Automobiles Sa | Procede de detection d'une rupture de liaison electronique dans un vehicule automobile |
CN202294690U (zh) * | 2011-09-02 | 2012-07-04 | 浙江豪情汽车制造有限公司 | 一种雨刮自动回位装置 |
JP2013062722A (ja) * | 2011-09-14 | 2013-04-04 | Denso Corp | 通信システム及び、当該通信システムを構成するスレーブノード |
CN202243362U (zh) * | 2011-09-30 | 2012-05-30 | 龚文资 | 汽车雨刮电机自动回位系统 |
CN103946829B (zh) * | 2011-10-05 | 2016-09-21 | 美国亚德诺半导体公司 | 用于高速数据和电力分配的双线通信系统 |
JP2013184484A (ja) * | 2012-03-06 | 2013-09-19 | Denso Corp | センサ異常検出装置 |
GB2503442A (en) * | 2012-06-26 | 2014-01-01 | Ibm | Locating faults in a network |
KR101393539B1 (ko) * | 2012-09-17 | 2014-05-09 | 기아자동차 주식회사 | 자동차 통합 네트워크 시스템 |
CN105270324A (zh) * | 2014-07-22 | 2016-01-27 | 中国重汽集团济南动力有限公司 | 一种雨刮电路 |
-
2016
- 2016-05-20 FR FR1654532A patent/FR3051576B1/fr active Active
-
2017
- 2017-05-18 EP EP17729515.1A patent/EP3458968A1/fr not_active Withdrawn
- 2017-05-18 WO PCT/FR2017/051201 patent/WO2017198954A1/fr unknown
- 2017-05-18 CN CN201780031101.7A patent/CN109154928A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
FR3051576A1 (fr) | 2017-11-24 |
WO2017198954A1 (fr) | 2017-11-23 |
CN109154928A (zh) | 2019-01-04 |
FR3051576B1 (fr) | 2019-06-14 |
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