CN102721934A - Accelerated detection method for service life of driving power supply - Google Patents
Accelerated detection method for service life of driving power supply Download PDFInfo
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- CN102721934A CN102721934A CN2011100771602A CN201110077160A CN102721934A CN 102721934 A CN102721934 A CN 102721934A CN 2011100771602 A CN2011100771602 A CN 2011100771602A CN 201110077160 A CN201110077160 A CN 201110077160A CN 102721934 A CN102721934 A CN 102721934A
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- driving power
- acceleration detection
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Abstract
The present invention relates to an accelerated detection method for a service life of a driving power supply. The method takes a hypothesis that a real service life of the driving power supply meets requirements of a designed service life as a premise, sets a working environment at a high temperature, calculates a theoretical minimum service life of the driving power supply under such detection condition by a confidence correlation formula and the Arrhenius acceleration model, and then conducts an accelerated detection with the theoretical minimum service life as detection time. According to a result of the accelerated detection (whether a fault happens to the driving power supply), whether the service life of the driving power supply meets design requirements of the service life or not is determined. The accelerated detection method for the service life of the driving power supply, under a condition that a failure mechanism of the driving power supply remains unchanged, accelerates failures by a method of increasing working temperature stress of the driving power supply, and discovers potential defects of the driving power supply; and the detection method is simple and convenient, the detection time is controllable, the detection is combined with a suitable theoretical basis, and the detection efficiency is higher.
Description
Technical field
The present invention relates to the acceleration detection method in a kind of serviceable life; Especially relate to a kind of driving power acceleration detection method in serviceable life.
Background technology
Driving power develops more and more rapider as a kind of critical piece of industrial products; And the life-span of driving power is an important indicator of weighing its quality; Therefore, judge whether meet design requirement the actual life of driving power through detecting test to detecting its serviceable life of in design process, setting; But traditional detection method to driving power actual life is under its normal operating condition, to do long life test, damages or reach the requirement in serviceable life of design until drive plate; The life-span of normal driving power can reach up to ten thousand hours, like this, under normal operating condition, does serviceable life and detects, and will cause detection efficiency low, has prolonged the R&D cycle of new product, and the waste lot of manpower and material resources.
Summary of the invention
The present invention is keeping under the constant condition of driving power failure mechanism, and the method for the environment temperature through improving its work is quickened to lose efficacy, and detects whether to reach designing requirement its serviceable life and find the defective that it is potential.Design service life according to driving power; Infer the theoretical minimum serviceable life that driving power should satisfy under the condition of high temperature through Allan Nice (Arrhenius) accelerated life test model and degree of confidence theory; Then with theory minimum serviceable life as detection time, under the condition of high temperature, driving power is carried out acceleration detection; Thereby shorten driving power in the detection time of developing and producing, reduce product development and production cost.
For achieving the above object, a kind of accelerated aging method of testing of the present invention may further comprise the steps:
Step S1: confirm testing conditions, may further comprise the steps:
Step S1-1: the detected temperatures Ta that confirms to carry out acceleration detection according to driving power;
Step S1-2: set the quantity N of the driving power that acceleration detection adopted, N is a natural number;
Step S1-3: the failure number r=0 and the degree of confidence c that set acceleration detection;
Step S2: the T in theoretical minimum serviceable life that calculates acceleration detection; May further comprise the steps:
Step S2-1: carry out under the acceleration detection situation at detected temperatures Ta, calculate speedup factor AF:
Wherein, Ea is an activation energy, and is relevant with the material of driving power; K is a Boltzmann constant; Tc is the environment temperature of normality work, and Ta is the environment temperature of high temperature acceleration detection, and the unit of Tc and Ta is Kelvin;
Step S2-2: the T in theoretical minimum serviceable life that calculates driving power:
Ts＝2N*T*AF/X
2(1-c，2r+2)
Wherein, Ts is the design service life of driving power, and N is the quantity of the driving power that acceleration detection adopted, and AF is a speedup factor, and c is a degree of confidence, and r is a failure number; X
2(1-c 2r+2) is card side's distribution function;
Step S3: under testing conditions, carry out acceleration detection; May further comprise the steps:
Step S3-1: but the driving power that has shell of N operate as normal of selection is as test specimen;
Step S3-2: the environment temperature in the chamber is stabilized in detected temperatures Ta;
Step S3-3: test specimen is arranged in the chamber, set the detection time=theoretical minimum serviceable life T, carry out acceleration detection;
Step S3-4: reach detection time, finish acceleration detection.
Above-mentioned purpose can also be further perfect through following technical proposals.
Also comprise step S4:, whether reach designing requirement the serviceable life of judging driving power according to the result of acceleration detection; May further comprise the steps:
Step S4-1: after the acceleration detection, judge whether N driving power breaks down;
Step S4-2: whether break down according to N driving power, whether reach designing requirement the serviceable life of judging driving power.
Said step S4-2: may further comprise the steps:
Step S4-21:N driving power all do not break down, and then reached designing requirement the serviceable life of driving power;
In step S4-22:N the driving power driving power that breaks down is arranged, then do not reach designing requirement the serviceable life of driving power.
Above-mentioned purpose can also be further perfect through following technical proposals.Also comprise step S1-0: the electrical quantity of record driving power under rated voltage;
Step S4-1 is further comprising the steps of:
Step S4-11: the electrical quantity of driving power under rated voltage after the record acceleration detection;
Step S4-12: the electrical quantity of driving power under rated voltage after the comparison acceleration detection and the electrical quantity under rated voltage:
Electrical quantity before the electrical quantity of N after an acceleration detection driving power under rated voltage and the acceleration detection under rated voltage is consistent, and N driving power all do not break down;
Electrical quantity before electrical quantity and the acceleration detection of N after an acceleration detection driving power under rated voltage under rated voltage is inconsistent, in N the driving power driving power that breaks down is arranged.
Said step S1-1 may further comprise the steps:
Step S1-11: cloth temp probe on the key element of driving power;
Step S1-12: driving power is put into chamber, driving power is worked under rated voltage, slowly rise the environment temperature of chamber, through the actual work temperature of each key element of temp probe monitoring driving power supply;
Step S1-13: in the chamber temperature-rise period; All do not exceed in the actual work temperature of each key element under the condition of nominal operation temperature range of himself; The maximal value that environment temperature reached of record chamber, the detected temperatures Ta with said peaked environment temperature during as acceleration detection.
In step S1-2, set 10≤N≤20.
In step S1-3, set c=0.8.
In step S1-11, said key element comprises electric capacity, metal-oxide-semiconductor, the diode on the major loop.
Beneficial effect of the present invention:
The inventive method is simple, and is quick, and whether meet design requirement the actual life that can detect driving apace, and can find out the defective of driving power as soon as possible according to test findings, improves; Effectively raise detection efficiency and design efficiency, reduced design cost driving power.
Embodiment
Driving power can reach up to ten thousand hours the serviceable life under the environment temperature of normality work, and therefore, the detection to driving power serviceable life under the environment temperature of normality work is also wanted the corresponding time.If but driving power has just been accelerated the inefficacy of driving power keeping improving the environment temperature of work under the constant condition of driving power failure mechanism, has shortened the serviceable life of driving power, and then has shortened detection time.
Further; The present invention is a prerequisite with the requirement of satisfying design service life the actual life of hypothesis driven power supply; Set the environment of hot operation; Calculate theoretical minimum serviceable life of driving power under this testing conditions through degree of confidence incidence formula and Allan Nice acceleration model, then with theory minimum serviceable life as carrying out acceleration detection detection time.According to result's (whether driving power breaks down) of acceleration detection, whether reach designing requirement the serviceable life of judging driving power.
For purpose, technical scheme and the advantage of the acceleration detection method that makes driving power of the present invention serviceable life are clearer,, the present invention is explained further details below in conjunction with embodiment; Below described specific embodiment only be used to explain the present invention, but be not used for limiting scope of the present invention.
The acceleration detection method in driving power of the present invention serviceable life may further comprise the steps:
Step S1: confirm testing conditions, may further comprise the steps:
Step S1-1: the detected temperatures Ta that confirms to carry out acceleration detection according to driving power;
Step S1-2: set the quantity N of the driving power that acceleration detection adopted, N is a natural number;
Step S1-3: the failure number r=0 and the degree of confidence c that set acceleration detection; Failure number is represented N quantity that driving power breaks down under the perfect condition after acceleration detection; The real time that degree of confidence is illustrated in the average no-failure operation of driving power under the testing conditions greater than Theoretical Calculation theoretical minimum serviceable life T probability, the value of degree of confidence is set according to the required degree of accuracy of acceleration detection;
Step S2: the T in theoretical minimum serviceable life that calculates acceleration detection; May further comprise the steps:
Step S2-1: carry out under the acceleration detection situation at detected temperatures Ta, calculate speedup factor AF:
Wherein, Ea is an activation energy, and is relevant with the material of driving power; K is a Boltzmann constant; Tc is the environment temperature of normality work, and Ta is the environment temperature of high temperature acceleration detection, and the unit of Tc and Ta is Kelvin;
Step S2-2: the T in theoretical minimum serviceable life that calculates acceleration detection:
Ts＝2N*T*AF/X
2(1-c，2r+2)
Wherein, Ts is the design service life of driving power, and N is the quantity of the driving power that acceleration detection adopted, and AF is a speedup factor, and c is a degree of confidence, and r is a failure number; X
2(1-c is card side's distribution function 2r+2), at c, under the situation that r confirms, can obtain through looking into card side's distribution function table;
Step S3: under testing conditions, carry out acceleration detection; May further comprise the steps:
Step S3-1: but the driving power that has shell of N operate as normal of selection is as test specimen;
Step S3-2: the environment temperature in the chamber is stabilized in detected temperatures Ta;
Step S3-3: test specimen is arranged in the chamber, set the detection time=theoretical minimum serviceable life T, carry out acceleration detection;
Step S3-4: reach detection time, finish acceleration detection.
A kind of accelerated aging method of testing also comprises:
Step S4:, whether reach designing requirement the serviceable life of judging driving power according to the result of acceleration detection; May further comprise the steps:
Step S4-1: after the acceleration detection, judge whether N driving power breaks down;
Step S4-2: whether break down according to N driving power, whether reach designing requirement the serviceable life of judging driving power.
Said step S4-2: may further comprise the steps:
Step S4-21:N driving power all do not break down, and then reached designing requirement the serviceable life of driving power;
In step S4-22:N the driving power driving power that breaks down is arranged, then do not reach designing requirement the serviceable life of driving power.
A kind of accelerated aging method of testing also comprises:
Step S1-0: the electrical quantity of record driving power under rated voltage;
Step S4-1 is further comprising the steps of:
Step S4-11: the electrical quantity of driving power under rated voltage after the record acceleration detection;
Step S4-12: the electrical quantity of driving power under rated voltage after the comparison acceleration detection and the electrical quantity under rated voltage:
Electrical quantity before the electrical quantity of N after an acceleration detection driving power under rated voltage and the acceleration detection under rated voltage is consistent, and N driving power all do not break down;
Electrical quantity before electrical quantity and the acceleration detection of N after an acceleration detection driving power under rated voltage under rated voltage is inconsistent, in N the driving power driving power that breaks down is arranged.
Said step S1-1 may further comprise the steps:
Step S1-11: cloth temp probe on the key element of driving power;
Step S1-12: driving power is put into chamber, driving power is worked under rated voltage, slowly rise the environment temperature of chamber, through the actual work temperature of each key element of temp probe monitoring driving power supply;
Step S1-13: in the chamber temperature-rise period; All do not exceed in the actual work temperature of each key element under the condition of nominal operation temperature range of himself; The maximal value that environment temperature reached of record chamber, the detected temperatures Ta with said peaked environment temperature during as acceleration detection.
In step S1-2, set 10≤N≤20.
In step S1-3, set c=0.8.
In step S1-11, said key element comprises electric capacity, metal-oxide-semiconductor, the diode on the major loop.
Acceleration detection below in conjunction with the driving power of a reality describes:
The designing requirement of this driving power, the environment temperature of normality work are 30 ℃, and design service life Ts is 1.4 ten thousand hours.
Step S1: confirm testing conditions, may further comprise the steps:
Step S1-1: the detected temperatures Ta that confirms to carry out acceleration detection according to driving power; May further comprise the steps:
Step S1-11: cloth temp probe on the key element of driving power;
Step S1-12: driving power is put into chamber, driving power is worked under rated voltage, slowly rise the environment temperature of chamber, through the actual work temperature of each key element of temp probe monitoring driving power supply;
Step S1-13: in the chamber temperature-rise period; All do not exceed in the actual work temperature of each key element under the condition of nominal operation temperature range of himself; 70 ℃ of the maximal values that environment temperature reached of record chamber, the detected temperatures Ta with 70 ℃ of said peaked environment temperatures during as acceleration detection;
Step S1-2:, set the quantity N=10 of the driving power that acceleration detection adopted in order to reduce the test duration, to improve acceleration detection result's accuracy;
Step S1-3: the failure number r=0 and the degree of confidence c=0.8 that set acceleration detection; Because the prerequisite of acceleration detection method of the present invention is to satisfy the requirement of design service life in the actual life of driving power, therefore, be that 10 driving powers are not and lost efficacy, i.e. r=0 in the perfect condition of acceleration detection; The value of degree of confidence is set according to the required degree of accuracy of acceleration detection;
Step S2: the T in theoretical minimum serviceable life that calculates acceleration detection; May further comprise the steps:
Step S2-1: carry out under the acceleration detection situation at detected temperatures Ta=70 ℃, calculate speedup factor AF:
Wherein, e is the carried charge of elementary charge, e=1.6021892 * 10
-19Coulomb; Tc=30 ℃, Ta=70 ℃ is K with ℃ conversion unit, Tc=30+273.15 then, Ta=70+273.15; K is a Boltzmann constant, K=1.38E-23J/K; According to the description of this area to the relevant materials of driving power, the activation energy in this example is chosen to be Ea=0.5, and unit is electron volts eV;
Step S2-2: the T in theoretical minimum serviceable life that calculates acceleration detection:
Ts＝2N*T*AF/X
2(1-c，2r+2)
Wherein, Ts=1.4 ten thousand hours, N=10, AF are speedup factor, c=0.8, r=0; X
2(1-c is card side's distribution function 2r+2), at c, under the situation that r confirms, can obtain through looking into card side's distribution function table;
Step S3: under testing conditions, carry out acceleration detection; May further comprise the steps:
Step S3-1: but the driving power that has shell of 10 operate as normal of selection is as test specimen;
Step S3-2: the environment temperature in the chamber is stabilized in detected temperatures Ta=70 ℃;
Step S3-3: test specimen is arranged in the chamber, set the detection time=theoretical minimum serviceable life T, carry out acceleration detection;
For the ease of control to detection time, calculate through step S2, round numerical value detection time and be approximately 240 hours; Be set at 240 hours detection time that is about to driving power acceleration detection in this example;
Step S3-4: reach detection time, finish acceleration detection.
A kind of result as present embodiment: after the acceleration detection before the electrical quantity of 10 driving powers under rated voltage and the acceleration detection electrical quantity under rated voltage consistent, 10 driving powers all do not break down; Reached design service life Ts the actual life of promptly judging driving power and be 1.4 ten thousand hours requirement;
Another kind of result as present embodiment: have before two electrical quantity and acceleration detection under rated voltage the electrical quantity under rated voltage inconsistent after the acceleration detection in 10 driving powers, two driving powers break down; Do not reach designing requirement the serviceable life of promptly judging driving power, and, driving power is improved according to the unusual parameter of driving power.
According to present embodiment, further illustrate, the invention discloses a kind of driving power detection method in serviceable life; According to Allan Nice speedup factor; And effectively combine concept of confidence, and be prerequisite to satisfy design service life the actual life of driving power, calculate detection time; Make detection method more easy; Make to have controllability detection time, and detection is combined with appropriate theoretical foundation, make the efficient of detection higher.
Claims (8)
1. the acceleration detection method in driving power serviceable life is characterized in that:
May further comprise the steps:
Step S1: confirm testing conditions, may further comprise the steps:
Step S1-1: the detected temperatures Ta that confirms to carry out acceleration detection according to driving power;
Step S1-2: set the quantity N of the driving power that acceleration detection adopted, N is a natural number;
Step S1-3: the failure number r=0 and the degree of confidence c that set acceleration detection;
Step S2: the T in theoretical minimum serviceable life that calculates acceleration detection; May further comprise the steps:
Step S2-1: carry out under the acceleration detection situation at detected temperatures Ta, calculate speedup factor AF:
Wherein, e is the carried charge of elementary charge, e=1.6021892 * 10
-19Coulomb; Ea is an activation energy, and is relevant with the material of driving power; K is a Boltzmann constant, k=1.38E-23J/K; Tc is the environment temperature of normality work, and Ta is the environment temperature of high temperature acceleration detection, and the unit of Tc and Ta is Kelvin;
Step S2-2: the T in theoretical minimum serviceable life that calculates driving power:
Ts＝2N*T*AF/X
2(1-c，2r+2)
Wherein, Ts is the design service life of driving power, and N is the quantity of the driving power that acceleration detection adopted, and AF is a speedup factor, and c is a degree of confidence, and r is a failure number; X
2(1-c is card side's distribution function 2r+2), at c, under the situation that r confirms, can obtain through looking into card side's distribution function table;
Step S3: under testing conditions, carry out acceleration detection; May further comprise the steps:
Step S3-1: but the driving power that has shell of N operate as normal of selection is as test specimen;
Step S3-2: the environment temperature in the chamber is stabilized in detected temperatures Ta;
Step S3-3: test specimen is arranged in the chamber, set the detection time=theoretical minimum serviceable life T, carry out acceleration detection;
Step S3-4: reach detection time, finish acceleration detection.
2. the acceleration detection method in driving power according to claim 1 serviceable life is characterized in that:
Also comprise step S4:, whether reach designing requirement the serviceable life of judging driving power according to the result of acceleration detection;
May further comprise the steps:
Step S4-1: after the acceleration detection, judge whether N driving power breaks down;
Step S4-2: whether break down according to N driving power, whether reach designing requirement the serviceable life of judging driving power.
3. the acceleration detection method in driving power according to claim 2 serviceable life is characterized in that:
Said step S4-2: may further comprise the steps:
Step S4-21:N driving power all do not break down, and then reached designing requirement the serviceable life of driving power;
In step S4-22:N the driving power driving power that breaks down is arranged, then do not reach designing requirement the serviceable life of driving power.
4. the acceleration detection method in driving power according to claim 2 serviceable life is characterized in that:
Also comprise step S1-0: the electrical quantity of record driving power under rated voltage;
Step S4-1 is further comprising the steps of:
Step S4-11: the electrical quantity of driving power under rated voltage after the record acceleration detection;
Step S4-12: the electrical quantity of driving power under rated voltage after the comparison acceleration detection and the electrical quantity under rated voltage:
Electrical quantity before the electrical quantity of N after an acceleration detection driving power under rated voltage and the acceleration detection under rated voltage is consistent, and N driving power all do not break down;
Electrical quantity before electrical quantity and the acceleration detection of N after an acceleration detection driving power under rated voltage under rated voltage is inconsistent, in N the driving power driving power that breaks down is arranged.
5. the acceleration detection method in driving power according to claim 1 serviceable life is characterized in that:
Said step S1-1 may further comprise the steps:
Step S1-11: cloth temp probe on the key element of driving power;
Step S1-12: driving power is put into chamber, driving power is worked under rated voltage, slowly rise the environment temperature of chamber, through the actual work temperature of each key element of temp probe monitoring driving power supply;
Step S1-13: in the chamber temperature-rise period; All do not exceed in the actual work temperature of each key element under the condition of nominal operation temperature range of himself; The maximal value that environment temperature reached of record chamber, the detected temperatures Ta with said peaked environment temperature during as acceleration detection.
6. the acceleration detection method in driving power according to claim 1 serviceable life is characterized in that:
In step S1-2, set 10≤N≤20.
7. the acceleration detection method in driving power according to claim 1 serviceable life is characterized in that: in step S1-3, set c=0.8.
8. the acceleration detection method in driving power according to claim 5 serviceable life, it is characterized in that: said key element comprises electric capacity, metal-oxide-semiconductor, the diode on the major loop.
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| CN201110077160.2A CN102721934B (en) | 2011-03-29 | 2011-03-29 | The acceleration detection method in a kind of driving power serviceable life |
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| CN201110077160.2A CN102721934B (en) | 2011-03-29 | 2011-03-29 | The acceleration detection method in a kind of driving power serviceable life |
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| CN107798164A (en) * | 2017-09-12 | 2018-03-13 | 北京空间飞行器总体设计部 | A kind of high rail satellite power supply control device accelerated life test system and method |
| CN112834943A (en) * | 2019-11-25 | 2021-05-25 | 郑州宇通集团有限公司 | Method and device for testing service life of battery management system based on high-temperature endurance test |
| CN112834942A (en) * | 2019-11-25 | 2021-05-25 | 郑州宇通集团有限公司 | Battery management system service life testing method and device based on temperature alternation test |
| CN112466387A (en) * | 2020-12-07 | 2021-03-09 | 武汉中原电子信息有限公司 | Rapid test method for read-write life of NAND FLASH chip |
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| Publication number | Publication date |
|---|---|
| CN102721934B (en) | 2016-01-13 |
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