WO2008009835A2 - Procédé de validation d'un diagnostic de fonctionnement d'un dispositif - Google Patents
Procédé de validation d'un diagnostic de fonctionnement d'un dispositif Download PDFInfo
- Publication number
- WO2008009835A2 WO2008009835A2 PCT/FR2007/051564 FR2007051564W WO2008009835A2 WO 2008009835 A2 WO2008009835 A2 WO 2008009835A2 FR 2007051564 W FR2007051564 W FR 2007051564W WO 2008009835 A2 WO2008009835 A2 WO 2008009835A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- result
- counter
- test
- elementary
- value
- 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.)
- Ceased
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/26—Functional testing
- G06F11/273—Tester hardware, i.e. output processing circuits
Definitions
- the invention relates to a method for validating a diagnosis of the operation of a device, in which a succession of elementary diagnoses is performed to determine the normal or abnormal operation of the device.
- the invention finds an advantageous application in the field of the automobile, and more particularly in the field of diagnosing embedded control devices of complex mechanical or electrical systems in a motor vehicle. But the invention can more generally be used in the field of functional diagnosis of any more or less complex system for which a diagnosis is valid only when particular conditions are met.
- a control device incorporates diagnostic means that are suitable for rapidly detecting a failure of the device under test (control device itself or the device electrical or functional controlled by the control device).
- failure here means either a malfunction, likely to lead to an immediate or eventual abnormal operation of the device under test, or a failure characterized by abnormal operation of the device under test.
- the failure may be continuous or intermittent.
- the diagnostic means implement the following method.
- Basic tests are performed at predefined times or in predefined situations (set of parameters of the monitored device with a predefined value), for a predefined time or a predefined number of times.
- the result of each elementary test indicates either a basic defect or normal operation of the monitored device.
- a failure is confirmed when a basic fault has been detected a preset time or number of times.
- a fault code corresponding to the fault, and other quantities related to the operation of the device under test are then stored in a fault memory of the diagnostic means.
- This stored information is subsequently used by a repairer to identify the failure and the conditions under which the failure has occurred. confirmed. After an appropriate repair based on the fault diagnosed, the fault memory is reset.
- the disadvantage of this method is that it does not make it possible to guarantee that the diagnosis of the device under test has been carried out completely, in particular in the case of an intermittent fault.
- the invention proposes a solution to this problem by proposing a new method for validating a diagnostic of a device under test.
- the invention relates to a method for validating an operating diagnostic of a device under test, during which a succession of elementary tests of the device under test is performed, each elementary test producing a positive or negative result indicating normal operation. or abnormal device under test
- the update of the occurrence counter can consist of:
- the update of the result counter can consist of:
- the diagnostic device is characterized in that it also comprises: A counter of occurrences [CRT], to count occurrences of identical results of successive elementary tests,
- FIGS. 1a to 1c schematize the operation of an embodiment of the method of the invention
- FIGS. 2a to 2e show schematically the operation of another embodiment of the method of
- the device under test is a device for controlling the injection system of an engine of a motor vehicle.
- the method of the invention is applicable more generally to any device under test which it is desired to detect a possible failure (malfunction or failure).
- the method according to the invention is a method for validating a diagnostic operation of the device under test.
- the method according to the invention ensures that the result of an operational diagnosis is reliable, whether it is positive or negative, that is to say, especially in the case of a positive result, that the positive result is reproducible at least a predefined number of times.
- the validation process comprises, as the previous diagnostic methods, the realization of a succession of elementary tests.
- each elementary test the operation of the device under test is tested, and it is determined whether the device has normal or abnormal operation. For this, during each elementary test, for example, values of a first set of parameters of the device are measured and compared with corresponding expected values.
- the result of an elementary test is a Boolean result that takes either a negative value, meaning an abnormal operation or a positive value, meaning normal operation.
- an elementary test is performed at predefined instants T1, T2, T3.
- an elementary test is performed in predefined situations, whenever a second set of parameters of the device under test takes a set of predefined values. For example, in the case of testing a temperature sensor of a fuel injection device in an engine, an elementary test is performed each time the following conditions are met: engine speed above a predefined threshold, coolant temperature above a predefined threshold and average estimated torque greater than a predefined threshold.
- the second set of parameters (the value of which is used to detect the moment when an elementary test must be performed) may be different from the first set of parameters (the value of which serves to determine the result of an elementary test).
- the occurrence counter is updated.
- the occurrence counter is incremented if the result of the current test case is identical to the result of a previous test case.
- the occurrence counter is initialized to an initial value if the result of the current test case is different from the result of the previous test case.
- the CTR value of the The occurrence counter thus gives an indication of the number of elementary tests successively carried out and giving a stable (identical) result, which may be negative, as the case may be, meaning an abnormal or positive operation, meaning normal operation.
- the result counter is updated.
- the result counter is incremented if the result of the elementary test is in the first logical state (in the example, negative), and the result counter is decremented if the result of the elementary test is in the second logical state (in the positive example).
- the FCTR value of the result counter thus gives an image of the number of occurrences of a negative test result relative to the number of occurrences of a positive test result: if the value of the result counter is significant, means that many elementary tests carried out led to an incrementation of the counter (corresponding to a test result signifying an abnormal operation of the device under surveillance). Conversely, if the FCTR value of the result counter is small, it means that a small number of elementary tests carried out led to an incrementation of the counter, the other tests carried out having led to a decrementation.
- the method according to the invention also comprises a diagnostic validation step, during which a diagnosis is validated if the result counter reaches a maximum value or if the occurrence counter reaches a maximum value.
- the occurrence counter reaches its maximum value CTRmax, it means that at least Cmax successive elementary tests gave the same result. In this case, we consider that the diagnosis is validated because it is stable.
- the diagnostic result is negative if the value of the result counter is lower than its maximum value FCmax, or positive otherwise.
- the validation step may comprise the production of a validation signal VAL, indicating that a diagnosis is validated (its result being positive or negative). A user of the device is thus informed that a valid diagnosis has been made.
- the diagnostic result can be viewed in the fault memory, or it can be displayed automatically in the user's view.
- the device under test is a control device for the engine injection system of a vehicle
- the result counter can be incremented to a first increment value and can be decremented by a decrement value.
- the occurrence counter may be incremented according to a second increment value.
- the first increment value is chosen equal to CTRMax / Cmax.
- the second increment value may be different from the first increment value.
- Figure la shows the operation of the device under test.
- the device is put into operation, and stopped at the instant TC.
- the device does not work properly (negative signal, equal to 1).
- the device operates normally (positive signal, equal to 0).
- the device does not operate normally (negative signal, equal to 1).
- the method is activated, when powering on, the device is started under test.
- T2 Tl + ⁇ T
- a second elementary test is performed, the result of which is negative.
- T3 T2 + ⁇ T
- a third elementary test is performed, the result of which is negative.
- the method according to the invention operates in the following manner.
- the method is activated, when powering on, the device is started under test.
- CTR Cmax
- the enable signal is activated ( Figure 2d). Since the occurrence counter has reached its maximum value, the diagnosis is considered valid because the test results are stable. In this example, the diagnostic result is positive because the value of the result counter is less than its maximum value. . Normal operation of the device under test is thus confirmed. The process ends when the device under test is stopped. It is reset when the device under test (CT instant) is switched on.
- the invention also relates to a diagnostic device, for diagnosing the operation of a device under test.
- the diagnostic device may for example be integrated in the device under test, or be appended to the device under test.
- the diagnostic device comprises means for performing a succession of elementary tests of operation of the device under test, each elementary test producing a positive or negative result indicating a normal or abnormal operation of the device under test.
- the diagnostic device according to the invention also comprises:
- a diagnostic validation means for producing an alert signal when the occurrence counter reaches a first maximum value CTRmax or when the achievement counter reaches a second maximum value FCTRmax.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009520018A JP2009545725A (ja) | 2006-07-17 | 2007-06-29 | デバイスの故障検出のための確認プロセス |
| US12/373,961 US8650003B2 (en) | 2006-07-17 | 2007-06-29 | Validation process for fault detection of a device |
| EP07803972A EP2084609A2 (fr) | 2006-07-17 | 2007-06-29 | Procédé de validation d'un diagnostic de fonctionnement d'un dispositif |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0606472A FR2903774B1 (fr) | 2006-07-17 | 2006-07-17 | Procede de validation d'un diagnostic de fontionnement d'un dispositif. |
| FR0606472 | 2006-07-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO2008009835A2 true WO2008009835A2 (fr) | 2008-01-24 |
| WO2008009835A3 WO2008009835A3 (fr) | 2009-07-23 |
Family
ID=37635861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR2007/051564 Ceased WO2008009835A2 (fr) | 2006-07-17 | 2007-06-29 | Procédé de validation d'un diagnostic de fonctionnement d'un dispositif |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8650003B2 (fr) |
| EP (1) | EP2084609A2 (fr) |
| JP (1) | JP2009545725A (fr) |
| FR (1) | FR2903774B1 (fr) |
| WO (1) | WO2008009835A2 (fr) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100082197A1 (en) * | 2008-09-30 | 2010-04-01 | Honeywell International Inc. | Intermittent fault detection and reasoning |
| US8381038B2 (en) * | 2009-05-26 | 2013-02-19 | Hitachi, Ltd. | Management server and management system |
| US20110144853A1 (en) * | 2009-12-15 | 2011-06-16 | Gm Global Technology Operations, Inc. | Mining methodology to eliminate inappropriate setting of error conditions using operating parameters |
| EP2472103B1 (fr) * | 2010-12-28 | 2015-04-22 | Vestas Wind Systems A/S | Système de maintenance d'éolienne et procédé de maintenance associé |
| DE102013220697B4 (de) * | 2013-10-14 | 2018-05-30 | Continental Automotive Gmbh | Kraftstoffpumpe eines Kraftfahrzeuges und Verfahren zum Betrieb einer Kraftstoffpumpe |
| US10545487B2 (en) * | 2016-09-16 | 2020-01-28 | Uop Llc | Interactive diagnostic system and method for managing process model analysis |
| US10768910B2 (en) * | 2016-10-31 | 2020-09-08 | Teletracking Technologies, Inc. | Systems and methods for generating interactive hypermedia graphical user interfaces on a mobile device |
| FR3060149A1 (fr) * | 2016-12-12 | 2018-06-15 | Continental Automotive France | Procede de diagnostic d'un ordonnancement de taches |
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| US3967103A (en) * | 1975-04-14 | 1976-06-29 | Mcdonnell Douglas Corporation | Decoder/analyzer test unit |
| JPH0619666B2 (ja) * | 1983-06-30 | 1994-03-16 | 富士通株式会社 | 故障診断処理方式 |
| JP2785847B2 (ja) * | 1988-03-14 | 1998-08-13 | 富士通テン株式会社 | 負荷制御装置 |
| US5152182A (en) * | 1991-04-17 | 1992-10-06 | Vibrac Corporation | Torque measuring apparatus |
| JPH05164819A (ja) * | 1991-12-12 | 1993-06-29 | Rohm Co Ltd | 集積回路の良否判定装置 |
| FR2692623B1 (fr) * | 1992-06-23 | 1995-07-07 | Renault | Procede de reperage cylindres pour le pilotage d'un systeme d'injection electronique d'un moteur a combustion interne. |
| JP3309437B2 (ja) * | 1992-08-19 | 2002-07-29 | 株式会社デンソー | 車両の自己診断装置 |
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| JPH10108353A (ja) * | 1996-09-30 | 1998-04-24 | Keihin Seiki Mfg Co Ltd | 負荷の故障判定装置 |
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| JPH11312288A (ja) * | 1998-04-28 | 1999-11-09 | Mikuni Corp | センサ故障診断方法 |
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| US7290193B2 (en) * | 2003-09-30 | 2007-10-30 | Sudhir Dattaram Kadkade | System verification using one or more automata |
| WO2005111556A2 (fr) * | 2004-05-07 | 2005-11-24 | Walter Kidde Portable Equipment, Inc. | Detecteur de flammes uv |
| JP4508732B2 (ja) * | 2004-06-11 | 2010-07-21 | 三菱電機株式会社 | 電子制御装置 |
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| JP5164819B2 (ja) | 2008-12-12 | 2013-03-21 | 矢崎総業株式会社 | 圧着バレルの圧着方法、圧着バレル及び圧着装置 |
-
2006
- 2006-07-17 FR FR0606472A patent/FR2903774B1/fr not_active Expired - Fee Related
-
2007
- 2007-06-29 JP JP2009520018A patent/JP2009545725A/ja active Pending
- 2007-06-29 US US12/373,961 patent/US8650003B2/en not_active Expired - Fee Related
- 2007-06-29 WO PCT/FR2007/051564 patent/WO2008009835A2/fr not_active Ceased
- 2007-06-29 EP EP07803972A patent/EP2084609A2/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR2903774B1 (fr) | 2008-09-05 |
| EP2084609A2 (fr) | 2009-08-05 |
| US8650003B2 (en) | 2014-02-11 |
| JP2009545725A (ja) | 2009-12-24 |
| FR2903774A1 (fr) | 2008-01-18 |
| WO2008009835A3 (fr) | 2009-07-23 |
| US20100049473A1 (en) | 2010-02-25 |
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