EP1259941A1 - Method and device for determining the remaining serviceable life of a product - Google Patents
Method and device for determining the remaining serviceable life of a productInfo
- Publication number
- EP1259941A1 EP1259941A1 EP01913549A EP01913549A EP1259941A1 EP 1259941 A1 EP1259941 A1 EP 1259941A1 EP 01913549 A EP01913549 A EP 01913549A EP 01913549 A EP01913549 A EP 01913549A EP 1259941 A1 EP1259941 A1 EP 1259941A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- product
- operating
- company
- operating time
- sizes
- 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
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
-
- 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
- G07C3/02—Registering or indicating working or idle time only
-
- 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
- G07C3/14—Quality control systems
-
- 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
- G07C5/02—Registering or indicating driving, working, idle, or waiting time only
Definitions
- the present invention relates to a method and a device for determining the remaining operating time of a product; the invention further relates to methods and a device for recording operating times up to the technical failure of the product as well as methods and a device for determining
- Operating time threshold values of products as a function of certain time-varying operating sizes for monitoring the reliability of products and finally the invention also relates to a device arranged in a product whose reliability is to be monitored, for comparing the actual operating time of the product with operating time threshold values in accordance with the preambles of independent claims.
- a method for determining the service life is known from DE 195 16 481 AI.
- a control device for a motor vehicle is described which has an operating data memory in which the operating sizes of the motor vehicle are stored, which can provide information on the probability of failure or the future reliability of the control device.
- Operating data memories are used to store essential data relating to the life history of a control unit in order to be able to make a statement as to the reliability of the control unit if necessary.
- the object of the present invention is to enable the most accurate possible, non-model-based life expectancy for any products that have an operational data memory or have such access. Another task is the optimal acquisition of data and storage in an operating data memory in order to be able to use the memory optimally, in particular in order to save storage space.
- the invention proposes, starting from a method for recording operating times up to the technical failure of a product, that values of specific operating sizes are recorded, the range of values of the individual operating sizes is divided into classes and the operating times depending on the class in that the recorded value of the company size falls.
- the invention proposes a method and a device for determining the remaining operating time of a product until technical failure, values of a value range of at least one company size of the product being recorded, the value range of the company size being divided into classes and for each Class determines an operating time of the product and stores it in an operating data memory assigned to the product, the operating times being assigned predeterminable weighting factors and thus at least one weighted, cumulative operating time for the product is determined, the weighted, cumulative operating time being compared with at least one predeterminable operating time threshold value and the remaining operating time of the product being determined therefrom.
- the product is designed, for example, as a control device or a subsystem (e.g. brake, engine, transmission, steering, etc.) of a motor vehicle.
- the products have or are assigned to an operating data memory, in which the recorded operating variables or the operating times can be stored and called up again as required.
- the operating data memory preferably has a non-volatile memory (for example an EEPROM or a flash EEPROM) as well as means for detecting the operating sizes or the operating times.
- the operating data memory can be implemented, for example, in one or more control units.
- the operating data memories are used to record discrete system states (e.g. number of start processes, number of emergency starts, number of thermal shutdowns, etc.) and the time-varying operating variables. For example, sensor data such as temperature, current, voltage, pressure, etc. a. detected.
- a linear or non-linear subdivision of the value range m into several classes is carried out in each case in the value range of the operating variables which is permissible under operating conditions. Extreme values that lead to the immediate destruction of the product are outside the permissible value range.
- the class assignment is based on the division of the entire value range into relevant load groups. The individual classes have a different influence on the aging / wear of the product.
- Operating data memory is used to record the operating time of the product for each operating size in each class.
- the determination of the individual technical operating time of a product and the calculation of the degree of wear at any given time is carried out on the basis of n classes of operating sizes. Due to the classified operating sizes, a particularly reliable and precise determination of the operating time of a product is possible, the storage requirement for the operating data memory being minimized, since it is not necessary to record the time course of the operating sizes. This enables particularly reliable preventive maintenance / repair shortly before the end of the technical operating life.
- the values of the company sizes are recorded at regular time intervals and a class number of a certain class is increased if the value of a company size falls into this class.
- each operating size of a specific product can thus be assigned an operating time histogram, from which the operating time of the product results for the operating size within a specific class.
- the size of the operational data memory in bytes required for the operational data storage results from the product of the number of operational sizes, the average number of classes per operational size and the average number of bytes per class number.
- the individual classes have a different influence on the aging / wear of the products. For this reason, the classes of company size are assigned weighting factors that determine the relative influence of a particular one
- the invention provides for determining the weighting factors from a subset K of the products and then applying them to the subset Z of the products. As a result, the critical weighted cumulative operating times of the sizes for series production can be determined for the products from the subset S, and when they are reached, an end to the technical operating time can be concluded.
- Is weighting factor assigned to class j of company size i and t_ijk is the service life of the product k for class j of company size i.
- the correlation between the farm sizes can be taken into account, for example, by determining the weighting factors from an equation system in which the weighted cumulative operating times for each farm size are linked to one another by means of operators.
- the operators can, for example, represent an AND operation (product formation), an OR operation (sum formation) or a fuzzy operation (e.g. an intermediate state between AND and OR).
- the critical cumulative operating times for the individual operating sizes are to be determined, when they are reached it can be concluded that the technical operating time has ended.
- a number of Z products are operated with the help of K products until technical failure, whereby the weighting factors calculated from the K products are applied to the classified operating sizes of the Z products.
- the need for repair, replacement or maintenance by the product can be signaled for all series products equipped with operating data memories shortly before the critical threshold value is reached.
- the company sizes saved in the product are evaluated as part of regular product maintenance.
- a_ ⁇ j is the weighting factor assigned to class j of company size 1
- t_ ⁇ Nk is the operating time of the product k for class j of company size 1.
- the weighting factors come from the solution of the optimization problem
- the correlation between the individual farm sizes is taken into account. It is assumed that several Large companies together lead to the technical destruction of the product.
- the company sizes are linked to one another by means of pure AND operations (product formation). The weighting factors are determined in such a way that the weighted class sums of each product linked by the AND operator have a minimal "distance" from one another.
- a link between several company sizes at the level of individual classes is provided. It is assumed that several company sizes within certain classes lead to technical destruction of the product.
- the device be the first
- the second means increase a class number of a certain class if the value of a detected company size m falls in this class.
- the device according to the invention for recording operating times on the basis of classified operating sizes has in particular when determining operating times. Thresholds of products for monitoring the reliability of products special advantages. Therefore, according to an advantageous development of the present invention, a device for determining operating time threshold values of the type mentioned at the outset is proposed, which is characterized in that the device has means for carrying out the method according to one of claims 5 to 8.
- the operating time threshold values are determined according to the method of one of claims 5 to 8.
- the operating data memory of the device can be made particularly small, since a determination of the operating time threshold values according to the invention makes it possible to dispense with a memory-intensive recording of time profiles of the operating variables.
- Operating data acquisition in classes also has the particular advantage that the memory can be used optimally, i.e. in particular only a small amount of storage space is required, since there is no need to carry out complex acquisition of operating sizes over the entire time axis or with reference to the time axis.
- the invention in particular the acquisition of operating data, can expediently be implemented as an additional functionality in a control device or in a device provided specifically for this purpose.
- Fig. 1 is a flow chart of an inventive
- FIG. 2 shows a flow chart of a method according to the invention for determining operating time threshold values of products according to a preferred embodiment.
- the product k whose operating time t_ijk is recorded, is designed, for example, as a control unit or a subsystem (eg brake, engine, transmission, steering, etc.) of a motor vehicle.
- the operating data memory preferably has a non-volatile memory (for example an EEPROM or a flash EEPROM) and means for detecting the operating sizes or operating times.
- the operating data memory can be implemented, for example, in one or more control devices.
- the operating data memories are used to record discrete system states (e.g. number of start processes, number of emergency starts, number of thermal shutdowns, etc.) and the time-varying operating variables i.
- Operating variables i are, for example, sensor data such as temperature, current, voltage, pressure and the like. a. detected.
- the method begins in a function block 10.
- Class assignment is based on the division of the entire value range into relevant stress groups.
- the individual classes j have a different influence on the aging / wear of the product k.
- values of the operating variables i are recorded at regular time intervals.
- the operating times t_ijk are recorded as a function of class j, in which the recorded value of company size i falls. This is done in one
- Function block 13 increases a class number of a certain class j if the value of the detected company size i falls into this class j.
- each operating variable i of a specific product k can thus be assigned an operating duration histogram from which the operating duration t_ijk of the product k for the operating variable i within a specific class results.
- the operating times t ijk result from the product of the status of the class number and the time interval between the recorded values of the company sizes i.
- FIG. 2 shows a flowchart of a method according to the invention for determining operating time threshold values of the products z according to a preferred embodiment.
- the method according to the invention begins in a function block 20. Then the operating times t_ijk of the products k for the class j of the operating variables i until the technical failure of the product k are determined by using the method according to FIG. 1.
- weighting factors a_ij are then assigned to the classes of the company variables i in a function block 21. Since the individual classes j have a different influence on the aging / wear of the products k, the classes j of the company sizes i are assigned weighting factors a_ij, which determine the relative influence of a specific class j of a specific company size i on the aging or wear of the product k prints.
- Company sizes i are linked to one another in the exemplary embodiment by means of pure AND links (product formation).
- Y_z (P_lz_kr ⁇ t, P_2z_k ⁇ t, ..., P_Nz_k ⁇ t),
- N 1 1 determined. This works with the required reliability if the individual column elements are sufficiently close together, ie if the standard deviation of the column elements is small. Outliers, if any, should not be taken into account when selecting the column mmima.
- the function for determining operating time threshold values of the products z is ended in function block 25. In addition to absolute or relative minimum selection and effective averaging, other methods and procedures such as moving or empirical or harmonic averaging or meridian formation, etc. can be used to determine the operating time threshold values.
- Threshold value the need for repair, replacement or maintenance is signaled by the product.
- this can also take the form of a self-diagnosis of the series product.
- the operating quantities stored in the product s are evaluated as part of regular product maintenance. This product maintenance can then e.g. for a sub-product of a vehicle, or the vehicle itself in the form of an on-board diagnosis.
- FIG. 3 schematically shows a possible device according to the invention.
- the product itself is marked with P.
- This is connected to a product-external operating data memory BSe by a communication system KS, in particular a line or bus system.
- KS a communication system
- an internal operating data memory BSi can be provided in the product itself.
- Both memories can also be present at the same time and, for example, a virtual memory can be formed from BSe and BSi.
- M eg m in the form of Microcomputers or microcontrollers which are used to carry out the methods according to the invention as described above. These means can, for example, also be present or introduced in a control unit of a motor vehicle.
- the product P is designed, for example, as a control unit or a subsystem (e.g. brake, engine, transmission, steering, etc.) of a motor vehicle.
- the products P have one
- the operating data memory preferably has a non-volatile memory (for example an EEPROM or a flash memory) and also means EM for recording the operating sizes or the operating times.
- the operating data memory can be implemented, for example, in one or more control devices.
- the acquisition means EM obtain their information e.g. via the communication system KS or other interfaces of the product, e.g. to other sensors or actuators.
- the evaluation, service life detection, service life determination by means of threshold value comparison, etc. is carried out in particular by the means M, which also initiate or carry out the signaling or the initiation of further measures.
- the detection means EM and the means M can also be present in a combination, that is to say combined, and can also be specifically assigned to the operating data memories or integrated into them.
- the operating data memories are used to record discrete system states (e.g. number of start processes, number of emergency starts, number of thermal shutdowns, etc.) as well as the time-varying operating sizes.
- sensor data such as temperature, current, voltage, pressure etc. are recorded.
- the sensors required for this are connected, for example, via the communication system KS or are coupled to the product via further interfaces. Depending on the product, some or all of the sensors can be integrated into the product. The same applies to actuators which supply information according to the invention in particular.
- the need for repair, replacement or maintenance can be signaled by the product s shortly before the critical threshold value is reached.
- This can in particular also take the form of a self-diagnosis of the series product, e.g. by operating data memory with integrated means M or detection means EM.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Quality & Reliability (AREA)
- Testing And Monitoring For Control Systems (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Debugging And Monitoring (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
- General Factory Administration (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Multi-Process Working Machines And Systems (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Vending Machines For Individual Products (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10007308A DE10007308A1 (en) | 2000-02-17 | 2000-02-17 | Method and device for determining the remaining operating time of a product |
DE10007308 | 2000-02-17 | ||
PCT/DE2001/000362 WO2001061653A1 (en) | 2000-02-17 | 2001-01-31 | Method and device for determining the remaining serviceable life of a product |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1259941A1 true EP1259941A1 (en) | 2002-11-27 |
EP1259941B1 EP1259941B1 (en) | 2008-03-19 |
Family
ID=7631345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01913549A Expired - Lifetime EP1259941B1 (en) | 2000-02-17 | 2001-01-31 | Method and device for determining the remaining serviceable life of a product |
Country Status (10)
Country | Link |
---|---|
US (1) | US7076396B2 (en) |
EP (1) | EP1259941B1 (en) |
JP (1) | JP4813732B2 (en) |
KR (1) | KR20020076314A (en) |
CN (1) | CN1313983C (en) |
AT (1) | ATE389921T1 (en) |
AU (2) | AU3914801A (en) |
BR (1) | BR0108490A (en) |
DE (3) | DE10007308A1 (en) |
WO (1) | WO2001061653A1 (en) |
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DE10161998A1 (en) * | 2001-12-18 | 2003-07-17 | Daimler Chrysler Ag | Method for control system monitoring, especially of motor vehicle electrical or electronic systems, enables estimation of an aging factor for a whole system rather than just for individual components within it |
DE10212064B4 (en) | 2002-03-19 | 2008-08-21 | Robert Bosch Gmbh | Operation control for a hand tool |
US6922656B2 (en) * | 2002-04-18 | 2005-07-26 | Caterpillar Inc | Method and system of identifying a problem prone part |
KR100471959B1 (en) * | 2002-06-17 | 2005-03-10 | 대진 시스템(주) | Instrument for Cumulative Measuring Stop Time in Electric Water Gauge for Charging of Broader Unit Area Water Service |
DE60208028T2 (en) * | 2002-09-17 | 2006-07-13 | Maillefer Instruments Holding S.A.R.L. | Method and device for measuring the fatigue of dental instruments |
US6993457B2 (en) * | 2003-09-22 | 2006-01-31 | Daimlerchrysler Corporation | Failed component search technique |
DE102004024840B4 (en) * | 2004-05-14 | 2007-02-22 | Getrag Getriebe- Und Zahnradfabrik Hermann Hagenmeyer Gmbh & Cie Kg | Method for controlling an automated motor vehicle drive train |
WO2006002454A1 (en) * | 2004-07-02 | 2006-01-12 | Australasian Steel Products Pty Ltd | Hose assembly analysis apparatus and methods |
DE102004050769A1 (en) * | 2004-10-16 | 2006-04-20 | Robert Bosch Gmbh | A method of determining information about a device exposed to temperature |
GB2430039B (en) * | 2005-09-07 | 2008-06-04 | Motorola Inc | Product age monitoring device and method of use of the device |
US20070204230A1 (en) * | 2006-02-27 | 2007-08-30 | Eastman Kodak Company | System and method for managing operator replaceable components |
US20070260342A1 (en) * | 2006-05-08 | 2007-11-08 | Standard Aero Limited | Method for inspection process development or improvement and parts inspection process |
DE102006029495A1 (en) * | 2006-06-27 | 2008-01-03 | Abb Patent Gmbh | Controlling or measuring device`s e.g. pressure meter, probable instant of failure calculating method for use in electronic device, involves detecting parameter in defined intervals, and storing detected values for forming time series |
US8396571B2 (en) * | 2007-03-19 | 2013-03-12 | United Technologies Corporation | Process and system for multi-objective global optimization of maintenance schedules |
EP2012209A1 (en) * | 2007-07-02 | 2009-01-07 | Siemens Aktiengesellschaft | Method for determining the durability of a power station component |
US7822577B2 (en) * | 2007-08-15 | 2010-10-26 | General Electric Company | Methods and systems to develop an experience-based probabilistic lifing process |
CN101373495B (en) * | 2007-08-24 | 2010-09-29 | 西门子公司 | Method and system for judging service life termination and estimating present historical service life |
FR2923909B1 (en) * | 2007-11-15 | 2009-11-27 | Renault Sas | DEVICE FOR GENERATING AN INFORMATION SIGNAL REPRESENTATIVE OF A WEAR RATE OF A MECHANICAL PART OF A MOTOR |
US20090271127A1 (en) * | 2008-04-25 | 2009-10-29 | General Motors Of Canada Limited | System and method for monitoring vehicle residual integrity |
DE102008038890B4 (en) * | 2008-08-13 | 2021-09-02 | Volkswagen Ag | Method and device for load counting in an electromechanical steering system |
EP2323105B1 (en) | 2009-10-16 | 2014-12-03 | Alcatel Lucent | Monitoring of machines |
DE102012103030B3 (en) * | 2012-04-05 | 2013-05-23 | Reis Group Holding Gmbh & Co. Kg | Method for operating an industrial robot |
US10495010B2 (en) | 2016-08-16 | 2019-12-03 | Dana Heavy Vehicle Systems Group, Llc | Damage protection for multi-function axle |
JP6752739B2 (en) * | 2017-02-15 | 2020-09-09 | 株式会社日立製作所 | Maintenance equipment, presentation system and program |
CN106951701B (en) * | 2017-03-15 | 2019-03-05 | 珠海全志科技股份有限公司 | The calculation method and system of NAND FLASH service life |
DE102017204440A1 (en) | 2017-03-16 | 2018-09-20 | Robert Bosch Gmbh | Method for sizing an actuator |
DE102018103008A1 (en) * | 2018-02-09 | 2019-08-14 | Trw Airbag Systems Gmbh | METHOD FOR MONITORING A SAFETY SYSTEM IN A VEHICLE AND MONITORING SYSTEM |
CN109030548B (en) * | 2018-08-08 | 2021-06-29 | 苏州科技大学 | Polymer material thermal aging life evaluation method based on activation energy variation |
CN109375032B (en) * | 2018-09-15 | 2021-04-30 | 宁波高云电气有限公司 | Management system of high-power large-capacity capacitor |
CN110823544A (en) * | 2019-11-20 | 2020-02-21 | 中国船舶重工集团海装风电股份有限公司 | Method, device, equipment and medium for calculating residual service life of variable-pitch motor brake |
CN112060319B (en) * | 2020-09-09 | 2021-09-14 | 中联重科股份有限公司 | Method and device for predicting life condition of wearing part of stirring main machine |
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US6349268B1 (en) * | 1999-03-30 | 2002-02-19 | Nokia Telecommunications, Inc. | Method and apparatus for providing a real time estimate of a life time for critical components in a communication system |
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- 2000-02-17 DE DE10007308A patent/DE10007308A1/en active Pending
-
2001
- 2001-01-31 DE DE10190532T patent/DE10190532D2/en not_active Expired - Lifetime
- 2001-01-31 AU AU3914801A patent/AU3914801A/en active Pending
- 2001-01-31 US US10/204,113 patent/US7076396B2/en not_active Expired - Lifetime
- 2001-01-31 DE DE50113758T patent/DE50113758D1/en not_active Expired - Lifetime
- 2001-01-31 AU AU2001239148A patent/AU2001239148B2/en not_active Ceased
- 2001-01-31 BR BR0108490-9A patent/BR0108490A/en not_active IP Right Cessation
- 2001-01-31 AT AT01913549T patent/ATE389921T1/en not_active IP Right Cessation
- 2001-01-31 WO PCT/DE2001/000362 patent/WO2001061653A1/en active IP Right Grant
- 2001-01-31 KR KR1020027010734A patent/KR20020076314A/en not_active Application Discontinuation
- 2001-01-31 EP EP01913549A patent/EP1259941B1/en not_active Expired - Lifetime
- 2001-01-31 CN CNB018052770A patent/CN1313983C/en not_active Expired - Lifetime
- 2001-01-31 JP JP2001560959A patent/JP4813732B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO0161653A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN1313983C (en) | 2007-05-02 |
DE10007308A1 (en) | 2001-08-23 |
DE50113758D1 (en) | 2008-04-30 |
JP4813732B2 (en) | 2011-11-09 |
DE10190532D2 (en) | 2003-01-30 |
EP1259941B1 (en) | 2008-03-19 |
JP2003523588A (en) | 2003-08-05 |
KR20020076314A (en) | 2002-10-09 |
US7076396B2 (en) | 2006-07-11 |
US20030101019A1 (en) | 2003-05-29 |
AU3914801A (en) | 2001-08-27 |
ATE389921T1 (en) | 2008-04-15 |
CN1422415A (en) | 2003-06-04 |
WO2001061653A1 (en) | 2001-08-23 |
AU2001239148B2 (en) | 2005-12-01 |
BR0108490A (en) | 2003-04-22 |
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