EP2152563A1 - Dispositif de contrôle de valeurs de paramètre(s) par analyse de fiabilité, et calculateur correspondant - Google Patents
Dispositif de contrôle de valeurs de paramètre(s) par analyse de fiabilité, et calculateur correspondantInfo
- Publication number
- EP2152563A1 EP2152563A1 EP08805815A EP08805815A EP2152563A1 EP 2152563 A1 EP2152563 A1 EP 2152563A1 EP 08805815 A EP08805815 A EP 08805815A EP 08805815 A EP08805815 A EP 08805815A EP 2152563 A1 EP2152563 A1 EP 2152563A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- value
- acquired
- plausible
- acquired value
- values
- 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.)
- Granted
Links
- 230000000052 comparative effect Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C5/00—Registering or indicating the working of vehicles
- G07C5/08—Registering or indicating performance data other than driving, working, idle, or waiting time, with or without registering driving, working, idle or waiting time
- G07C5/0808—Diagnosing performance data
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C3/00—Registering or indicating the condition or the working of machines or other apparatus, other than vehicles
- G07C3/08—Registering or indicating the production of the machine either with or without registering working or idle time
Definitions
- the invention relates to the control of the parameter values (s) acquired by sensors, and more precisely the shaping of these parameter values (s) for use, for example by processing functions of a computer .
- the values of a parameter can sometimes be erroneous. This can for example be the case when a short circuit or an open circuit occurs at a sensor.
- the computers routinely perform diagnostics based on the parameter values (s) that are acquired by certain sensors. These diagnoses are intended to indicate to the processing functions that use the parameter values (s) acquired, if the latter are erroneous or not.
- the sensor During this time T 0 the sensor generally has time to acquire at least one value that is potentially wrong (or false) although plausible since below the diagnostic threshold which marks the beginning of the diagnostic zone. Therefore, a processing function may use a potentially erroneous (though plausible) value before being alerted by the diagnostic function, which may result in events of varying severity. To limit these error situations, it is possible to format the parameter values before they are used by the processing functions. For this purpose, it is possible for example to use a circuit comprising electronic components implementing a Boolean logic, as described in particular in documents FR 2815197 and WO 2004/084070.
- the object of the invention is therefore to propose an alternative, inexpensive and of low complexity, to known solutions for shaping parameter values.
- a device dedicated to the control of parameter values (s) acquired by means of a sensor according to a predefined acquisition period T A , and comprising loaded control means, when they receive an acquired value. compare this acquired value with a threshold value in order to consider it as plausible, respectively not plausible, if it is lower or respectively greater than a chosen threshold value, and to deliver on an output a reliable (and therefore plausible) acquired value ) prior to the comparative earned value if the latter is plausible, ie a replacement value if this comparative acquired value is implausible.
- reliable (or robust) value is a value that we are sure is not potentially wrong, although plausible.
- the device according to the invention may comprise other characteristics that can be taken separately or in combination, and in particular: its control means can be loaded, when the compared acquired value is plausible, to deliver on a output a reliable acquired value prior to N A vesting periods compared to comparative earned value;
- N A may for example be equal to the upper rounded value of the ratio between a maximum time T 0 , set by the sensor in the event of a failure to deliver an acquired value greater than the threshold value, and the period T A acquisition;
- control means can be loaded, when a first acquired value compared is not plausible and follows a previous acquired value considered plausible, to issue on the output a first replacement value chosen, and then, if the values acquired after this first non-plausible acquired value are also considered as not plausible, to issue on the output successive replacement values which decrease to a value chosen starting from the first replacement value; alternatively, its control means can be loaded, when the compared acquired value is not plausible, to deliver on the output a constant replacement value.
- the invention also proposes a computer, capable of performing diagnostics from parameter values (s) controlled, and comprising a device for controlling parameter values (s) of the type presented above.
- FIG. 1 schematically and functionally illustrates an example of a computer integrating an embodiment example; control device according to the invention coupled to a sensor,
- FIG. 2 is an example of a time evolution diagram of the value of a parameter delivered by a sensor
- FIG. 3 is an example of a time evolution diagram of the formatted parameter value that is constructed. by a control device according to the invention from the time evolution diagram of FIG.
- the attached drawings may not only serve to complete the invention, but also contribute to its definition, if any.
- the object of the invention is to enable the formatting of parameter values (s) derived from sensor (s), which are inexpensive and of low complexity.
- the invention proposes to control by means of a control device D (with a view to formatting) the value of at least one parameter, which is acquired periodically (according to an acquisition period T A ) by a sensor CA at the level of EQ equipment.
- the equipment EQ is a pedal, for example a motor vehicle.
- the invention is not limited to this type of equipment. It concerns indeed any type of equipment whose behavior in time is at least partially represented by the value of at least one parameter.
- the parameter is the position of the pedal EQ.
- the invention is not limited to this type of parameter. It concerns any type of parameter whose value may vary over time and can be acquired by a CA sensor (whatever the type).
- the AC sensor delivers periodically (according to the acquisition period T A ) a voltage (in analog form). But, it could also periodically deliver digital data representative of this voltage (or of an intensity, for example).
- FIG. 2 shows an example of a time evolution diagram (t) of the value of the voltage VA (t) that is delivered by the sensor CA.
- the device D controls (and formats) the values of a single parameter (here a voltage). But, it could control (and format) the values of several (at least two) parameters, possibly from at least two different sensors.
- the device D forms part of a computer CL, which is here embedded in a motor vehicle.
- This calculator CL comprises for example a processing module MT which implements at least one function using parameter values (s) formatted VM (t) and representative of the operation of one (or more) equipment (s) (or organ (s)) of the motor vehicle.
- the calculator CL also comprises a diagnostic module MD responsible for performing diagnostics relating to the operation of one or more equipment (or parts) of the motor vehicle, from, in particular, the values of this (these) same parameter (s), before being shaped (hereinafter referred to as VA (t)).
- a diagnostic module MD responsible for performing diagnostics relating to the operation of one or more equipment (or parts) of the motor vehicle, from, in particular, the values of this (these) same parameter (s), before being shaped (hereinafter referred to as VA (t)).
- the device D may not be part of the calculator CL. It can indeed be coupled to it, or be part of a CA sensor which it ensures the control and shaping VA values acquired (t).
- the device D can also be part of the diagnostic module MD.
- a device D according to the invention comprises at least one MC control module responsible for intervening each time it receives a value acquired by the CA sensor.
- the values delivered by the AC sensor are not necessarily transmitted directly to the device D. They can indeed be communicated to it by an intermediate device, after a possible treatment (for example an analog / digital conversion).
- Each intervention consists firstly in comparing the acquired value received VA (t) with a chosen threshold value VS, in order to determine whether it is plausible or not.
- a chosen threshold value VS By definition, an acquired value VA (t) is considered plausible when it is lower than the chosen threshold value VS, and an acquired value VA (t) is considered to be implausible when it is greater than VS threshold value chosen.
- variable t designates the time.
- the threshold value VS is for example a value that is used by the diagnostic module MD of the calculator CL to detect a failure.
- the threshold value VS is called the diagnostic threshold.
- control module MC When the control module MC has determined whether the acquired value received VA (t) is plausible or not plausible, it delivers on an output either a reliable (and therefore plausible) acquired value VA (tN A ) which is prior to this acquired value. VA (t) if the latter is plausible, a replacement value VR if the acquired value VA (t) is implausible.
- the acquired value VA (t) it takes a maximum time T 0 to reach the threshold value VS and therefore the diagnostic zone in which the diagnostic module MD considers it to be erroneous (or false). Therefore, if the last acquired value received VA (t) is in the diagnostic area (and therefore estimated not plausible), the N A values previously acquired VA (M) ... VA (tN A ) are potentially erroneous (well as plausible since lower than the threshold value VS). It is therefore preferable not to deliver as such these potentially erroneous values, although plausible, in order to avoid deceiving the processing module MT.
- control module MC estimates that the last acquired value received VA (t) is plausible, it replaces it with the reliable acquired value VA (tN A ) which has been received N A acquisition periods T A before she.
- N A is equal to two acquisition periods T A.
- the device D In order to be able to perform this type of replacement, the device D must have at each instant N A last acquired values received VA (M) ... VA (tN A ). To do this, it can for example store the last received values N A VA (M) ... VA (tN A ) in storage means MS, such as a memory, coupled to its control module MC.
- storage means MS such as a memory
- the control module MC judges that a (first) acquired value VA (t) is implausible, and that the latter follows a previous acquired value VA (M) considered reliable, it can for example replace it with a first replacement value VR1 chosen. Then, if the values VA (t + n) (with n> 1) which are acquired after this first acquired value VA (t) not plausible are also considered as not plausible, the control module MC may for example replace them with successive replacement values VR which decrease to a chosen value (possibly 0) starting from the first replacement value VR1. It will be recalled that a replacement value VR is a parameter value VM (t) which is output by the device D on its output when its control module MC estimates that the last acquired value VA (t) qu he received is not plausible.
- a replacement value VR is a parameter value VM (t) which is output by the device D on its output when its control module MC estimates that the last acquired value VA (t) qu he received is not plausible.
- the successive replacement values decrease in a substantially linear manner towards a chosen value o VR2, starting from the replacement value VR1. This amounts to setting up a backup strategy of converging to the replacement value VR2 by means of a ramp.
- control module MC may be arranged to deliver on the output of the device D a constant replacement value, for example equal to VR1 or to VR2, as long as it receives acquired values VA (t) that it considers not plausible.
- the device D delivers on its output only reliable values (or robust) and not at the same time reliable values and potentially erroneous but plausible values, which allows, for example, not to mislead. the processing module MT.
- control device D according to the invention, and in particular its module
- MC control and its possible storage means MS can be realized in the form of electronic circuits, software modules (or computer), or a combination of circuits and software.
- the invention is not limited to the control device and computer embodiments described above, only by way of example, but
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Regulating Braking Force (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Multi Processors (AREA)
- Hardware Redundancy (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Testing And Monitoring For Control Systems (AREA)
- Safety Devices In Control Systems (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0755498A FR2917202B1 (fr) | 2007-06-06 | 2007-06-06 | Dispositif de controle de valeurs de parametre(s) par analyse de fiabilite, et calculateur correspondant. |
| PCT/FR2008/050869 WO2009000986A1 (fr) | 2007-06-06 | 2008-05-20 | Dispositif de contrôle de valeurs de paramètre(s) par analyse de fiabilité, et calculateur correspondant |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2152563A1 true EP2152563A1 (fr) | 2010-02-17 |
| EP2152563B1 EP2152563B1 (fr) | 2011-04-13 |
Family
ID=38996641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08805815A Not-in-force EP2152563B1 (fr) | 2007-06-06 | 2008-05-20 | Dispositif de contrôle de valeurs de paramètre(s) par analyse de fiabilité, et calculateur correspondant |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2152563B1 (fr) |
| AT (1) | ATE505386T1 (fr) |
| DE (1) | DE602008006183D1 (fr) |
| FR (1) | FR2917202B1 (fr) |
| WO (1) | WO2009000986A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2583468Y2 (ja) * | 1991-09-13 | 1998-10-22 | 光洋精工株式会社 | パワーステアリング装置 |
| FR2815197B1 (fr) * | 2000-10-06 | 2003-01-03 | St Microelectronics Sa | Circuit asynchrone pour la detection et la correction de l'erreur induite et procede de mise en oeuvre |
| DE602004001869T2 (de) * | 2003-03-20 | 2007-05-03 | Arm Ltd., Cherry Hinton | Fehlererkennung und fehlerbehebung für systematische und zufällige fehler innerhalb einer verarbeitungsstufe einer integrierten schaltung |
-
2007
- 2007-06-06 FR FR0755498A patent/FR2917202B1/fr not_active Expired - Fee Related
-
2008
- 2008-05-20 EP EP08805815A patent/EP2152563B1/fr not_active Not-in-force
- 2008-05-20 AT AT08805815T patent/ATE505386T1/de not_active IP Right Cessation
- 2008-05-20 WO PCT/FR2008/050869 patent/WO2009000986A1/fr not_active Ceased
- 2008-05-20 DE DE602008006183T patent/DE602008006183D1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009000986A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE602008006183D1 (de) | 2011-05-26 |
| WO2009000986A1 (fr) | 2008-12-31 |
| FR2917202B1 (fr) | 2009-08-21 |
| ATE505386T1 (de) | 2011-04-15 |
| EP2152563B1 (fr) | 2011-04-13 |
| FR2917202A1 (fr) | 2008-12-12 |
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