EP2550538A1 - Non-intrusive device for diagnosis, by vectorial comparison, of operating situation(s) in at least one communication network - Google Patents
Non-intrusive device for diagnosis, by vectorial comparison, of operating situation(s) in at least one communication networkInfo
- Publication number
- EP2550538A1 EP2550538A1 EP11712621A EP11712621A EP2550538A1 EP 2550538 A1 EP2550538 A1 EP 2550538A1 EP 11712621 A EP11712621 A EP 11712621A EP 11712621 A EP11712621 A EP 11712621A EP 2550538 A1 EP2550538 A1 EP 2550538A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bus
- measurement
- operating situation
- vectors
- voltages
- 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- Withdrawn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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40032—Details regarding a bus interface enhancer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
Definitions
- the invention relates to devices that are responsible for performing diagnostics in communication networks that are equipped with a bus having at least one electrical wire on which a voltage can be measured non-intrusively.
- the buses of certain communication networks of the aforementioned type comprise a limited number of wires (at least one) to which communicating equipment can be connected in parallel so that they can exchange data with each other by means of multiplexed frames.
- This is for example the case of CAN LS ("Controller Area Network Low Speed"), CAN HS ("Controller Area Network High Speed"), VAN ("Vehicle Area Network”), LIN (“Local Interconnect Network”) networks. "), ARINC (“ Aeronautical Radio Inc. ”) or I2C (or IIC” Inter-lntegrated Circuit "), which are used in areas such as those of vehicles (possibly of automobile type), industrial installations, aeronautics, consumer electronics and the railway sector, in particular.
- connections that include such networks Due to the large number of connections that include such networks, they can be the subject of many malfunctions (or failures) difficult to detect. Thus, they may for example be short-circuited between an electrical wire carrying data and a ground, a short circuit between an electrical wire carrying data and a voltage of a power network (for example a vehicle), a short circuit between two electrical wires carrying data, or a cut of an electrical wire carrying data.
- the invention therefore aims to provide a non-intrusive alternative solution, delivering an instant diagnosis, usable in any communication network comprising a bus wire (s), and moreover small and / or particularly simple to use .
- a device dedicated to the diagnosis of operating situation (s) in at least one communication network having a bus comprising N wire (s) (electrical (s), with N> 1, and comprising:
- conversion means arranged to convert the P voltages into P first digital signals (S1 (p, t)),
- processing means arranged to constitute a measurement vector (V (t)) associated with a voltage measurement instant (t) and comprising K elements chosen from at least the first P digital signals (S1 (p, t)) , then to compare at least this measurement vector (V (t)) with at least I pairs, with I> 1, of first (Vn (i, t)) and second (V r2 (i, t)) vectors of reference comprising K elements and representative of K minimum and maximum values that can be taken by the K elements of the measurement vector (V (t)), in order to deliver I second signals (S2 (i)) representative each of the result of a comparison each result being representative of an operating situation on the bus, and
- - I display means each arranged to signal an operating situation represented by a second signal (S2 (i)) delivered.
- the term "operating situation” refers to any type of situation that may appear in operation in a network. It may for example be a malfunction or a lack of malfunction.
- the device can detect a lack of data on the bus or a normal operation (a) of the network or a problem or malfunction of a particular type, or a particular signal configuration, representative of the state of a system (such as high voltages but still comply with standards or specifications).
- the term "absence of malfunction” here means both the presence of data on the bus and the detection of normal operation of the network or the absence of a problem or malfunction of a particular type.
- the diagnostic device according to the invention may comprise other characteristics that can be taken separately or in combination, and in particular:
- its processing means can be arranged to compare Q measurement vectors (V (t)), with Q> 2, associated respectively with Q instants for measuring different voltages, with I pairs of first (Vn (i, t)) and second (V r2 (i, t)) reference vectors, in order to deliver I second signals (S2 (i)) representative each of an operating situation on the bus when the number of measurement vectors (V (t )), having at least one element that is not between the corresponding elements of a pair, is greater than or equal to a chosen threshold, or an opposite operating situation on the bus when the number of measurement vectors (V (t)), having at least one element that is not between the corresponding elements of a pair, is less than this chosen threshold;
- its processing means can be arranged to compare Q measurement vectors (V (t)), with Q> 2, respectively associated with Q instants for measuring different voltages, with I pairs of Q first reference vectors ( Vn (i, t)), associated respectively with Q instants, and Q second reference vectors (V r2 (i, t)) associated respectively with these Q instants, in order to deliver representative I second signals (S2 (i)) each of an operating situation on the bus when the number of measurement vectors (V (t)), having at least one element which is not between the corresponding elements of Q first reference vectors (Vn (i, t)) and Q second reference vectors (V r2 (i, t)) of the same pair, is greater than or equal to at a chosen threshold, or an opposite operating situation on the bus when the number of measurement vectors (V (t)), having at least one element which is not between the corresponding elements of Q first vectors of reference (V r (i, t)) and Q second reference vectors (V r2 (i))
- the chosen threshold may not vary from one pair to another, or it may vary according to the pair with which it is associated;
- its conversion means may have an acquisition period which is less than the acquisition duration of a voltage bit on the bus;
- At least one of the K elements of a measurement vector (V (t)) can result from a chosen mathematical combination of at least two of the first P digital signals (S1 (p, t));
- P conversion means arranged to respectively convert the P voltages into P first digital signals (S1 (p, t));
- its display means may comprise at least one indicator light associated with a second signal (S2 (i)) and arranged to be placed in a lit state or an off state depending on the value of this second signal (S2 (i )) associated;
- amplification means mounted upstream of its display means, and arranged to generate currents adapted to place each indicator light in its on or off state according to the value taken by the second signal (S2 ( i)) associate;
- each second signal (S2i) may further comprise delay means, interposed between its processing means and its display means, and arranged to maintain each second signal (S2i) at its initial value for a selected time delay, so that each situation operating time is signaled for at least the delay time;
- the delay means may comprise at least one circuit monostable recloser, for example capacitor (s);
- one of its P connection means may be able to be connected in shunt to a voltage supply source for supplying the withdrawn voltage
- regulating means adapted to be coupled to the connection means which is dedicated to the voltage supply source, so as to regulate the supply voltage taken to deliver a regulated voltage;
- filtering means adapted to be connected downstream of the connection means which is dedicated to the voltage supply source, and arranged at least for filtering voltage variations of the latter;
- amplification means mounted upstream of its conversion means, and arranged to amplify at least the voltages taken from the bus wires;
- blocking means mounted upstream of its conversion means, and arranged to stabilize the voltages taken from the bus wires so that they do not change value during their conversion;
- protection means mounted in shunt on its connection means, which are connected in shunt of the bus wires, upstream of its amplification means, and suitable for providing protection, in particular against electrostatic discharges; occurring on the bus wires.
- the invention is well adapted, although not exclusively, to communication networks that are located in vehicles, possibly of the automotive type.
- the aim of the invention is to provide a diagnostic device D intended to be connected to at least one communication network RC equipped with a bus BU comprising N electrical wire (s) CH, CL, with N> 1 , which can be connected in parallel communicating equipment, and on which voltages V1, V2 can be measured non-intrusively.
- the RC communication network is a network type CAN HS ("Controller Area Network High Speed" - ISO 1 1898).
- the invention is not limited to this type of communication network. It relates in fact to any type of communication network equipped with a bus allowing non-intrusive measurements of voltages on its (its) wire (s), and in particular CAN LS type networks ("Controller Area Network Low Speed" - standard ISO 1 1898), VAN (Vehicle Area Network), LIN (Local Interconnect Network), ARINC (Aeronautical Radio Inc.) and I2C (or IIC Inter-lntegrated Circuit). Therefore, the invention relates in particular to areas such as that of vehicles (land, sea (or fluvial) and air), that of industrial facilities, and that of consumer electronics.
- the RC network is part of a vehicle, possibly of automotive type (such as a car). But, as indicated above, the invention is not limited to this application.
- the diagnostic device D is intended to perform diagnostics for only one type of network (here CAN HS type). But, this is not mandatory. It could indeed be arranged to perform diagnostics for at least two different types of network.
- a CAN HS-type RC network comprises a bus BU provided with first CL and second CH electric wires which are dedicated to the transport of data frames and respectively called "CAN_L” and "CAN_H".
- At least some of the P MCp connection means are arranged to allow the branch connection of their (diagnostic) device D to the bus BU, in order to access (or remove) the voltages V1, V2 which are present on the wires of this BU bus.
- the two connection means MC1 and MC2 are arranged to take the voltages V1 and V2 respectively on the electric wires CL and CH.
- connection means MC1 and MC2 comprise, for example, two electrical connection cables, each provided at one of their two opposite ends with a connector, for example of the "crocodile clip” or “touch point” type. (insertable into a BUS bus connector socket).
- protection means MP1 and MP2 connected in shunt on its connection means MC1 and MC2, which are respectively connected by shunting on the wires CL and CH of BU bus, upstream of at least some of its conversion means (here MV1 and MV2).
- These protection means MPp are arranged in such a way as to protect the conversion means MV1 and MV2, in particular against the electrostatic discharges that may occur on the CL and CH wires of the bus BU.
- the device D comprises dividing bridges PD1 and PD2 each mounted in shunt on one of the connection means MC1, MC2 of the wires CL, CH.
- These PDp divider bridges (or any equivalent means for dividing the voltage) are designed to convert, analogically, the voltages they receive into voltages adapted to the range of input voltage that can withstand any locking means MBp (which will be discussed later) and the MVp conversion means, while having a high input impedance and avoiding a direct electrical link between the electronic circuits of the device D and the outside, so as to protect them.
- the low voltage of these dividing bridges PD1 and PD2 is that of the ground.
- the device D may also and possibly comprise another connection means MC3 intended to be connected in shunt to a voltage supply source BA to supply the elements that constitute the device D.
- the voltage supply source BA is for example the battery 12 volts on board.
- connection MC3 comprises, for example, two electrical connection cables, each provided at one of their two opposite ends with a connector, for example of the crocodile clip type or the touch point, which is just connect to the plus (+) terminal of the BA battery or to a vehicle ground screw.
- the device D could include an internal power source, for example a rechargeable battery, provided that it keeps a wire connected to a ground screw of the vehicle in order to use the latter as reference of the voltages V1 and V2 present on the wires CL and CH.
- an internal power source for example a rechargeable battery
- the device D does not include an internal power source, it is advantageous, as shown without limitation, that it comprises regulating means MR coupled to the ends of the electrical connection cables (connection means MC3 ), which are opposite to those provided with connectors. These regulation means MR are arranged so as to regulate the supply voltage which is taken by the connection means MC3 on the external power supply BA, in order to supply regulated voltage to at least some of the elements which constitute the device. D.
- the device D may comprise filtering means MG intended to be connected downstream of the connection means MC3 and arranged at least to filter the voltage variations of the source of the device. external power supply BA.
- these filtering means MG may comprise a diode connected in series and a capacitor connected in shunt between the connection means MC3 and the regulation means MR.
- the diode is intended to provide protection against reverse polarity of the external power supply (BA).
- the capacitor is preferably polarized and of high capacitance in order to ensure a large "reservoir” effect to enable the filtering of voltage variations.
- such MG filtering means also provide protection against electrostatic discharges.
- the device D comprises a divider bridge PD3 mounted in shunt between the ground and the connection means MC3 (and more precisely here between the diode and the capacitor means of MG filtering).
- This divider bridge PD3 (or any equivalent means for dividing the voltage) is designed to convert, analogically, the voltage it receives into a voltage adapted to the input voltage range that can support any means of blocking MBp (which will be discussed later) and the MVp conversion means, while having a high input impedance for the son connected to the network and avoiding a direct electrical connection between the electronic circuits of the device D and the outside , so as to protect them.
- the low voltage of this divider bridge PD3 is that of the ground.
- the conversion means MVp of the device D are arranged to convert the P voltages taken into P first digital signals S1 (p, t).
- the conversion means MVp can, as illustrated without limitation, be in the form of P discrete or integrated analog / digital converters, each responsible for converting a analog voltage Vp in a first digital signal S1 (p, t). But, this is not mandatory. Indeed, in one variant, the conversion means MVp can be made in the form of a single analog / digital converter, discrete or integrated, responsible for sequentially converting each analog voltage Vp (then presented in a multiplexed manner) into a first signal. numeric S1 (p, t).
- the conversion means MVp can convert the sampled analog voltages Vp into first 8-bit digital signals S1 (p, t) (or one byte).
- the device D comprises blocking means MBp, discrete or integrated, and mounted upstream of its MVp conversion means.
- the latter (MVp) are arranged to stabilize the voltages taken (here on the wires CH and CL of the bus BU and on the external power source BA, here via the divider bridge PD3) so that they are as stable as possible to facilitate their conversion by means of MVp conversion.
- the device D it is advantageous, as illustrated without limitation, for the device D to comprise first amplification means MF1 p mounted upstream of its MVp conversion means (and more precisely here between its PDp divider bridges and its blocking MBp). But in the absence of MBp blocking means they are connected directly to the MVp conversion means (upstream of these).
- These first amplification means MF1 p are arranged to amplify the voltages taken from the wires of the bus BU as well as here from the external power source BA so that the possible means of blocking MBp and the means of conversion MVp have a current and voltage well suited to their processing capabilities.
- the processing means MT are fed with first digital signals S1 (p, t) by the conversion means MVp.
- these processing means MT may constitute an MCT microcontroller or else, as illustrated in a nonlimiting manner, may be part of an MCT microcontroller which is for example, as illustrated, supplied with regulated voltage by the regulation means MR.
- the blocking means MBp and / or the conversion means MVp may possibly be part of (that is to say, be integrated in) the microcontroller MCT.
- microcontroller MCT could be replaced by other types of programmable logic circuits, such as ASICs.
- each processing means MT are firstly arranged to constitute a measurement vector V (t), associated with a measurement instant of voltages t, from at least some of the at least P first digital signals S1 (p, t ) that they receive MVp conversion means. More precisely, each measurement vector V (t) constituted comprises K elements which are chosen from at least the first P digital signals S1 (p, t).
- At least one of the K elements of a measurement vector V (t) may possibly be “virtual".
- the term “virtual element” means an element of a measurement vector V (t) which results from a chosen mathematical combination of at least two of the first P digital signals S1 (p, t).
- a virtual element may be the result of the difference between the voltages V1 and V2 taken respectively on the wires CL and CH. This difference constitutes a differential voltage that can be useful for discriminating so-called “recessive” states and so-called “dominant” states.
- a dominant state corresponds to a voltage V2 of about 3.5 V on the CH wire (CAN_H), a voltage V1 of about 1.5 V on the wire LH (CAN_L), and a differential voltage V2 - V1 of about 2 V.
- Any type of combination performed with any type of mathematical operator can be considered.
- a mathematical operation may for example consist of a multiplication, for example to validate a signal only when another signal is non-zero.
- the processing means MT are also arranged, once they have constituted a measurement vector V (t), to compare at least the latter (V (t)) with at least I pairs of first Vn (i, t) and second V r2 (i, t) reference vectors.
- the number I is greater than or equal to one (1).
- first reference vector V r (i, t) means a vector which is constituted in advance of K representative elements respectively of K minimum values that can be taken in normal operation by the corresponding K elements of a corresponding measurement vector V (t).
- second reference vector V r2 (i, t) is understood to mean a vector which is constituted in advance by K representative elements respectively of K maximum values which can be taken in normal operation by the corresponding K elements of a corresponding measurement vector V (t). It is important to note that a first V r (i, t) or second V r2 (i, t) reference vector may or may not be a function of a measurement instant t with respect to the instant current measurement.
- the comparison of an element of a measurement vector V (t) is intended to determine whether its value lies between the corresponding elements of a pair (V r (i, t), V r2 (i, t)), that is to say between a minimum value (possibly included) and a maximum value (possibly included). It will be understood that if the value of at least one element of a measurement vector V (t) is not between the corresponding elements of a pair (V r (i, t), V r2 ( i, t)) is that there is a particular operating situation on the bus BU (possibly a malfunction). Consequently, the result of a comparison is representative of an operating situation on the bus BU (possibly a fault or an absence of malfunction).
- operating situation is meant here any type of situation that may appear in operation in an RC network. It may for example be a malfunction or a lack of malfunction.
- the device D can detect a lack of data on the bus BU or abnormal operation of the RC network or a problem or malfunction of a particular type, or a particular signal configuration, representative of the state of a system (such as high voltages but still comply with standards or specifications).
- absence of malfunction here means both the presence of data on the bus BU and the detection of normal operation of the RC network or the absence of a problem or malfunction of a type. particular.
- the processing means MT can be possibly arranged to perform a filtering of the measurement vectors in order to disregard some of them which could prove erroneous.
- Two types of filtering can be envisaged, one relating to the states of the voltages taken Vp and the other to the transitions of the voltages taken Vp.
- the first type of filtering is particularly suitable in the case where the device D is subject to electromagnetic interference, in the case where the operation of the communication network RC is affected by interference voltages, or in the case where the analog / digital conversion is performed when converted voltages vary rapidly (for example in the case of a transition).
- This first type of filtering consists, for example, in comparing Q measurement vectors V (t), associated respectively with Q instants for measuring different voltages (preferably successive), with I pairs of first V r (i, t) and second V r2 (i, t) reference vectors (here independent of the parameter t).
- the number Q is greater than or equal to 2.
- This type of filtering requires that the processing means MT store the last Q measurement vectors they have constituted, namely V (t), V (t-1), V (t-2) V (t-Q +). 1).
- Each of the Q measurement vectors considered is then compared (element by element) with the first different reference vectors V r (i, t) which correspond to it and the second reference vectors V r2 (i, t) different but which correspond to it, according to the method previously described for a single measurement vector. Then, the processing means MT determine for each comparison of Q measurement vectors V (t) to one of the first pairs of V M (i, t) and second V r2 (i, t) reference vectors, if the number of measurement vectors V (t), which have at least one element which is not between the corresponding elements of a pair, is greater than or equal to a chosen threshold.
- the processing means MT deliver I second signals S2 (i) which are each representative of an operating situation on the bus BU (for example a fault) when the number of measurement vectors V (t) determined is greater than or equal to the chosen threshold, or an opposite operating situation on the bus BU (for example an absence of fault) when the number of measurement vectors V (t) determined is less than the chosen threshold.
- the threshold chosen may not vary from one pair to another, while in a second embodiment the chosen threshold may vary according to the pair with which it is associated.
- the elements of the Q measurement vectors V (t) and the elements of the first Vn (i, t) and second V r2 (i, t) reference vectors can be coded on the same number bits (for example 8). But, this is not mandatory.
- the Q measurement vectors V (t) can possibly be grouped together in a measurement matrix in which each column (or row) is a measurement vector V (t).
- This arrangement makes it possible to obtain a comparison algorithm that is more compact and therefore less expensive to implement.
- the invention can operate with a period of acquisition of the MVp conversion means which is less than the duration of a voltage bit on a CH, CL wire of the bus BU, in particular in order to avoid missing to analyze certain phenomena of short duration specific to the RC network.
- the MVp conversion means comprise only one converter combined with a multiplexer of voltages Vp making it possible to present the analog signals to be converted one by one successively on its input
- the comparison algorithm must realize as much conversion steps that Vp voltages to analyze. In this case, one can use a period, to achieve once the conversion of all voltages Vp to be analyzed, which is less than the duration of a voltage bit on the bus BU, for the same reasons as above.
- the second type of filtering consists for example in comparing Q measuring vectors V (t), associated respectively with Q moments of measurement of different voltages (t) (and preferably successive), with I pairs of Q first reference vectors V r (i, t), associated respectively with Q instants , and Q second reference vectors V r2 (i, t), associated respectively with these same Q instants.
- the first V r (i, t) and second V r2 (i, t) reference vectors are here dependent on the parameter t, since a pair of vectors is associated at each instant between tQ-1 and t.
- the number Q is also greater than or equal to 2.
- the Q measurement vectors V (t) can be placed within a measurement matrix, which is then compared with I first minimal reference matrices (which each comprise Q first reference vectors V r (i, t )) and I second maximum reference matrices (which each comprise Q second reference vectors V r2 (i, t)).
- This second type of filtering requires that the processing means MT store the last Q measurement vectors they have constituted, namely V (t), V (t-1), V (t-2), ..., V (tQ-1), as well as the first and second reference matrices.
- Each element of the measurement matrix is then compared with the corresponding element of each of the first reference matrices and with the corresponding element of each of the first reference matrices, according to the method previously described for a single measurement vector. Then, the processing means MT determine, for each comparison of the measurement matrix with one of the I pairs of first and second reference matrices, the number of measurement vectors V (t), which have at least one element that is not between the corresponding elements of a pair, is greater than or equal to a chosen threshold.
- the processing means MT deliver I second signals S2 (i) which are each representative of an operating situation on the bus BU when the number of measurement vectors V (t) determined is greater than or equal to the chosen threshold, or an opposite operating situation on the bus BU when the number of measurement vectors V (t) determined is less than the chosen threshold.
- this second type of filtering makes it possible to detect voltage transitions Vp. But, it will be noted that it requires the setting The result of a comparison is only true during a few successive conversions by the conversion means MVp when the chosen threshold is large. It will also be noted that the invention makes it possible to detect voltage transitions on the bus BU that are both synchronous and non-synchronous.
- the threshold chosen may not vary from one pair to another, while in a second embodiment the chosen threshold may vary according to the pair with which it is associated.
- the device D can for example diagnose at least some of the operating situations among those listed below:
- the processing means MT deliver I second signals S2 (i) respectively representative of the results of these I comparisons.
- These display means MAi may for example be implanted in a front of a BO box of the device D, in which are housed the MVp conversion means and the processing means MT, as well as the possible regulation means MR, first amplification means MF1 p, filtering means MG, PDp dividing bridges, protection means MPp, blocking means MBp, as well as any other delay means MTPi and second amplifying means MF2i which will be discussed later.
- the display means MAi may comprise I LEDs associated respectively with the I second signals S2 (i), and therefore with I operating situations (and their complementary (the opposite operating situations)).
- Each LED M1 may for example be arranged in the form of a light emitting diode (or LED) can be placed in a lit state or an off state according to the value of the second signal S2 (i) associated.
- Each indicator light MAi can protrude on the side of an external face (visible) of the front of the BO box in order to be easily observed by its user.
- the number of LEDs MAi depends on the number of second signals S2 (i) that are delivered by the processing means MT.
- the box BO may comprise six LEDs MAi (i).
- a first indicator light MA1 can signal normal operation of the RC network when it is on and abnormal operation of the RC network when it is off,
- a second indicator light MA2 can signal the presence of data frames in the bus BU when it is on and the absence of data frames in the bus BU when it is off,
- a third indicator light MA3 may signal a short circuit between the electric wire CL and a voltage of the vehicle power network when it is on and the absence of a short circuit between the electric wire CL and a voltage of the power supply network. power of the vehicle when it is off,
- a fourth indicator light MA4 may signal a short circuit between the electric wire CH and a voltage of the vehicle power network when is switched on and the absence of a short circuit between the electric wire CH and a voltage of the power network of the vehicle when it is off,
- a fifth indicator light MA5 may signal a short circuit between the electric wire CL and a ground when it is on and the absence of a short circuit between the electric wire CL and a mass when it is off, and
- a sixth indicator light MA2 may signal a short circuit between the electric wire CH and a ground when it is on and the absence of a short circuit between the electric wire CH and a mass when it is off.
- the device D may optionally include at least one additional indicator light, to signal at least one additional function, such as for example the fact that it is connected (or in operation, and therefore usable) or disconnected (or out of operation, and therefore unusable).
- the display means MAi may be in other forms than the one presented above (indicator lights). Indeed, they may for example comprise a display screen (for example liquid crystal (or LCD)) for displaying messages for signaling each operating situation associated with a second signal S2 (i). In this case, the display means MAi must also comprise conversion means responsible for converting each second signal value S2 (i) into a displayed message. Note that a displayed message may optionally be accompanied by an equivalent or identical synthetic sound message.
- the device D may optionally comprise timing means MTPi interposed between its processing means MT and its display means MAi and arranged so as to maintain each second signal S2 (i) at its initial value for a duration of selected delay.
- these timing means MTPi which may be discrete or integrated (and therefore possibly integrated in the microcontroller MCT (or equivalent), as illustrated without limitation), are loaded, when they receive a second signal S2 (i) d a given value to deliver on their output (s) this same value given during the chosen time delay.
- each operating situation can be signaled for at least the duration of delay.
- This duration of delay can be chosen greater than the duration of the average retinal persistence of the human eye.
- This option is intended to enable a user to visualize the switching on or off of a warning light MAi, including when the processing means MT generate the second signal S2 (i) associated for a very short time due to an intermittent operating situation (for example linked to a false contact and a transient vibration). This delay may possibly only concern the display of the presence of a particular situation.
- a delay time at least equal to about 40 ms.
- These delay means MTPi may for example comprise at least one monostable recloser circuit, for example capacitor (s), associated with at least one second signal S2 (i).
- This type of circuit rapidly charges a capacitor at the beginning of the delay and slowly discharges this capacitor afterwards, the speed difference between the charge and the discharge being obtainable by means of a diode which is on during charging.
- the device D may optionally comprise second amplification means MF2i mounted upstream of the display means MAi, and preferably between the possible delay means MTPi and the display means MAi.
- These second amplification means MF2i are arranged in such a way as to generate currents which are suitable for (or capable of) placing each indicator light MAi in its on or off state according to the value taken by the associated second signal S2 (i).
- These second amplification means MF2i may for example comprise at least one transistor amplifier having an input capable of receiving a second signal S2 (i) via the possible delay means MTPi and an output connected to an indicator light MAi for supplying it. running (and therefore control its operation).
- the use of the device D is particularly simple. Once the user has plugged it into a tap on the RC network (and more precisely on its bus BU), as well as possibly to the external battery BA, with its connection means MCp, it delivers results immediately via its display means MAL
- an operating situation is signaled by the display means MAi, then the user can disconnect from the network RC an organ to determine if it is at the origin of this operating situation.
- At each operating situation can also correspond in a predetermined manner (for example in a correspondence table) at least one organ (possibly suspect). It will be noted that the processing of predetermined types of faults can be a type of troubleshooting accessible with the device D according to the invention.
- the device D not only does not signal any other operating situation but can now signal normal operation, the diagnosis is completed and the suspect organ is to be examined.
- the user reconnects it to the RC network and disconnects from the latter (RC) another organ, until it determines the one ( or those) that is (are) the source of the reported operating situation (s).
- the device D In the presence of multiple operating situations, the device D signals normal operation once all the organs at the origin of an operating situation have been disconnected. As long as an organ causing one of the operating situations remains connected, the device D may continue to signal an operating situation.
- the device D is particularly advantageous because it is not only non-intrusive, but also of the passive type insofar as it does not transmit data to the RC network and only monitors the voltages. Vp that are present on his BU bus as well than possibly on its external power supply BA.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1052054A FR2957678B1 (en) | 2010-03-22 | 2010-03-22 | NON-INTRUSTIVE DEVICE FOR DIAGNOSIS, BY VECTOR COMPARISON, OF SITUATION (S) OF OPERATION IN AT LEAST ONE COMMUNICATION NETWORK |
PCT/FR2011/050369 WO2011117495A1 (en) | 2010-03-22 | 2011-02-22 | Non-intrusive device for diagnosis, by vectorial comparison, of operating situation(s) in at least one communication network |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2550538A1 true EP2550538A1 (en) | 2013-01-30 |
Family
ID=43064447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11712621A Withdrawn EP2550538A1 (en) | 2010-03-22 | 2011-02-22 | Non-intrusive device for diagnosis, by vectorial comparison, of operating situation(s) in at least one communication network |
Country Status (4)
Country | Link |
---|---|
US (1) | US8744667B2 (en) |
EP (1) | EP2550538A1 (en) |
FR (1) | FR2957678B1 (en) |
WO (1) | WO2011117495A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201507495D0 (en) * | 2015-04-30 | 2015-06-17 | Cooper Technologies Co | Bus network terminator |
US10347056B2 (en) | 2017-04-17 | 2019-07-09 | Connected Holdings, Llc | Apparatus and method for monitoring vehicle ON/OFF state |
CN108802565B (en) * | 2018-04-28 | 2020-09-01 | 国网上海市电力公司 | Medium-voltage power distribution network disconnection ungrounded fault detection method based on machine learning |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4694408A (en) | 1986-01-15 | 1987-09-15 | Zaleski James V | Apparatus for testing auto electronics systems |
US4796206A (en) | 1986-06-02 | 1989-01-03 | International Business Machines Corporation | Computer assisted vehicle service featuring signature analysis and artificial intelligence |
GB2210999B (en) | 1987-10-09 | 1992-04-29 | Fuji Heavy Ind Ltd | Diagnostic system for a motor vehicle |
DE4027626A1 (en) | 1990-08-31 | 1992-03-12 | Daimler Benz Ag | DEVICE FOR DETECTING DIAGNOSTIC DATA FROM ELECTRONIC UNITS IN A MOTOR VEHICLE |
US5491418A (en) * | 1994-10-27 | 1996-02-13 | General Motors Corporation | Automotive diagnostic communications interface |
GB9516414D0 (en) * | 1995-08-10 | 1995-10-11 | Genrad Ltd | Electronic diagnostic system |
US20020039030A1 (en) * | 2000-08-03 | 2002-04-04 | Mehyar Khazei | System, method, and apparatus for product diagnostic and evaluation testing |
US7134423B2 (en) * | 2002-11-01 | 2006-11-14 | Visteon Global Technologies, Inc. | Ignition diagnosis and combustion feedback control system using an ionization signal |
US7690352B2 (en) * | 2002-11-01 | 2010-04-06 | Visteon Global Technologies, Inc. | System and method of selecting data content of ionization signal |
DE10313467A1 (en) * | 2003-03-26 | 2004-10-07 | Daimlerchrysler Ag | Fault diagnosis and/or control information re-programming method for traffic network control device, using radio link between hand-held diagnosis device and control device |
US7376499B2 (en) * | 2005-09-16 | 2008-05-20 | Gm Global Technology Operations, Inc. | State-of-health monitoring and fault diagnosis with adaptive thresholds for integrated vehicle stability system |
-
2010
- 2010-03-22 FR FR1052054A patent/FR2957678B1/en active Active
-
2011
- 2011-02-22 WO PCT/FR2011/050369 patent/WO2011117495A1/en active Application Filing
- 2011-02-22 EP EP11712621A patent/EP2550538A1/en not_active Withdrawn
- 2011-02-22 US US13/579,277 patent/US8744667B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2011117495A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2957678B1 (en) | 2012-03-23 |
US8744667B2 (en) | 2014-06-03 |
FR2957678A1 (en) | 2011-09-23 |
WO2011117495A1 (en) | 2011-09-29 |
US20120314749A1 (en) | 2012-12-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP3308177B1 (en) | Electrical system comprising a circuit for detecting an electrical insulation fault | |
FR3019303B1 (en) | DEVICE FOR MEASURING AT LEAST ONE PHYSICAL SIZE OF AN ELECTRICAL INSTALLATION | |
EP2721684B1 (en) | System of batteries of cells with simplified monitoring | |
EP2890990B1 (en) | Device for detecting and measuring an insulation fault | |
WO2010092275A1 (en) | Method and device for classifying a battery | |
EP3707521B1 (en) | Method for detecting the state of an electronic protective appliance in an electrical facility and detection device implementing said method | |
FR2947055A1 (en) | ELECTRIC ENERGY METER WITH NON-INSULATED CURRENT SENSOR AND CUT-OFF SWITCH | |
WO2012101347A1 (en) | Device for detecting an earth connection fault of an electrical connector system | |
WO2015150670A1 (en) | Method of measuring the energy consumption of the branches of an electrical network and measurement equipment implementing said method | |
WO2011117495A1 (en) | Non-intrusive device for diagnosis, by vectorial comparison, of operating situation(s) in at least one communication network | |
WO2019042636A1 (en) | Method for determining the state of an electrical line linking a battery cell to a monitoring unit, and corresponding monitoring unit | |
EP2538229B1 (en) | Phase-comparing device with dual terminal connection | |
WO2011114032A1 (en) | Device for detecting the disconnection of a battery from a power supply network | |
WO2010122255A1 (en) | Non-invasive device for diagnosing operational defect(s) in at least one communication network | |
FR3037668A1 (en) | POWER SUPPLY SYSTEM FOR PROGRAMMABLE AUTOMATE | |
FR3109222A1 (en) | Method for detecting an electrical insulation fault between an electrical energy source and an electrical ground | |
EP2435842A1 (en) | Method for determining the origin of power outages | |
EP2494564A1 (en) | System for the preventive diagnosis of contact impedance and overloads in a switch | |
EP3943955A1 (en) | Methods, devices and systems for detecting an insulation fault in an electrical installation | |
FR3092708A1 (en) | USB-PD Device Test Equipment | |
FR3007530A1 (en) | DEVICE FOR DIAGNOSING THE LOSS OF A CONNECTION BETWEEN AN ELECTRONIC CONTROL MODULE AND A MASS | |
EP3100465B1 (en) | System and corresponding method for managing a battery comprising a plurality of battery cells | |
EP1480434A1 (en) | Method and device for transmission of electrical energy in a wired telecommunication system | |
WO2014207351A1 (en) | Apparatus for locking electrical devices of a vehicle via digital communication | |
FR2998726A1 (en) | Detector for detecting breakdown of neutral in three-phase electrical installation used in refill station for charging electric vehicle, has fault lamp and limiting impedance unit connected in series between terminal and ground conductor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20121017 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: H04L 12/40 20060101ALI20140313BHEP Ipc: H04L 12/26 20060101AFI20140313BHEP |
|
GRAJ | Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted |
Free format text: ORIGINAL CODE: EPIDOSDIGR1 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20140410 |
|
INTC | Intention to grant announced (deleted) | ||
INTG | Intention to grant announced |
Effective date: 20140506 |
|
GRAJ | Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted |
Free format text: ORIGINAL CODE: EPIDOSDIGR1 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20141211 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20150422 |