CN108037391A - New-energy automobile vehicle monitor terminal life testing method based on Lawson models - Google Patents

New-energy automobile vehicle monitor terminal life testing method based on Lawson models Download PDF

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Publication number
CN108037391A
CN108037391A CN201711349169.8A CN201711349169A CN108037391A CN 108037391 A CN108037391 A CN 108037391A CN 201711349169 A CN201711349169 A CN 201711349169A CN 108037391 A CN108037391 A CN 108037391A
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msub
product
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lawson
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岑锦潮
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Foshan Zuwo Technology Co ltd
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Foshan Zuwo Technology Co ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)

Abstract

The present invention proposes a kind of new-energy automobile vehicle monitor terminal life testing method based on Lawson models, and product is generally in the temperature environment of multiple changes in actual use, generally chooses several typical temperature spots by counting.The present invention with reference to the characteristic feature of vehicle monitor terminal, formulates corresponding differentiation testing program, accelerating aging test is carried out to it by analyzing its mathematical model, to shorten the test period, improves test efficiency, reduces experimentation cost.

Description

New-energy automobile vehicle monitor terminal life testing method based on Lawson models
Technical field
The present invention relates to a kind of new-energy automobile vehicle monitor terminal life testing method based on Lawson models.
Background technology
" safely " it is that new-energy automobile is developed so far the topic that temperature does not subtract still.In order to strengthen to new-energy automobile safety The monitoring of operation, by collection vehicle condition real time data, effectively can reduce or exclude vehicle and run potential security risk, really Consumer safety is protected to use.The end of the year in 2016, China issue and implement " electric automobile remote service and management system technology rule Model " series standard, and require all new-energy automobiles that the vehicle monitor terminal for meeting the standard is installed.Vehicle monitor terminal passes through The mode collection vehicle real-time running data such as CAN bus, is stored and is uploaded to management platform by modes such as GSM. Vehicle monitor terminal is the data source for realizing new-energy automobile security control, its importance is self-evident, thus requires vehicle-mounted Monitor terminal reliable and stable operation in defined life cycle, the research to its life characteristics are particularly necessary.Standard requires car The least life for carrying monitor terminal is 5 years, but, in the actual development checking test of product, when can not expend so long Between verify its life characteristic, so, not only the test period is very long, and experimentation cost is higher, less efficient, seriously affect production Product being designed and developed and promoting and applying.
The content of the invention
In view of this, a kind of new-energy automobile vehicle monitor terminal service life based on Lawson models proposed by the present invention surveys Method for testing, according to all kinds of mathematical models and the typical feature of vehicle monitor terminal, formulates corresponding testing program, as short as possible The life characteristic of vehicle monitor terminal is effectively assessed in cycle.
A kind of new-energy automobile vehicle monitor terminal life testing method based on Lawson models, product are actually using When be generally in the temperature environment of multiple changes, generally pass through to count and choose several typical temperature spots；
Lawson models are generally used for simulation vehicle electronics electric components and are continuously put down in vehicle parking by actual environment Accelerated test that equal hygro-thermal stress influences, generally use steady state damp heat test carry out accelerated ageing；Lawson moulds are provided first The accelerated factor algorithmic formula (1) of type：
In formula:AT/RHAccelerated factor of-certain product on vehicle under the mean temperature of actual environment, humidity, it is the temperature, wet The installation site spent generally with product on vehicle is related；EAThe activation energy of-product failure reaction,；K- Boltzmann constants, Value is 8.617 × 10e V/ DEG C；TPrufThe acceleration temperature value of selection during-progress accelerated test, generally corresponds to the highest of product Operating temperature or maximum storage temperature value；TFeld ParkenThe mean temperature of product installation site under the conditions of-vehicle is normally parked Value, which is usually statistical value；B- constants, value are 5.57 × 10；RHPrufThe humidity value defined during-accelerated test；RHFeld ParkenThe medial humidity value of product installation site, the value are usually statistical value under the conditions of-vehicle is normally parked；
The algorithmic formula (2) based on the Lawson model accelerated aging test times is given below：
In formula:tPruf--- the accelerated aging test time；tFeld Parken--- product is idle during projected life Time, generally takes its limiting value, i.e., the situation that product is not run in its life cycle.
Calculated based on Lawson models accelerated test
According to engineering experience and associated international standards regulation, installed in the average phase of the auto parts and components of passenger car passenger compartment It is 60%RH to humidity, mean temperature is 23 DEG C, i.e. TFeld ParkenFor 23 DEG C, RHFeld ParkenFor 60%RH.In order to certain Accelerate aging speed in degree, be set under 65 DEG C of temperature, relative humidity 95%RH and tested here, i.e. TPrufFor 65 DEG C, RHPrufFor 95%RH, it can show that the Lawson models accelerated factor under the conditions of this is 129.5 according to formula (1).
As mentioned before, off position time i.e. its time projected life of the vehicle monitor terminal is given tacit consent to here, i.e., tFeld ParkenFor 5 (year) × 365 (my god) × 24=43800h, which can be calculated according to formula (2) and be based on The accelerated test time of Lawson models is 338.2h.
In order to assess the service life of vehicle monitor terminal this new-energy automobile security control critical component, to ensure It can provide reliable and stable work in the statement cycle, herein by the normal of experiment of high-temperature load of the introducing based on Lawson models The physics accelerated aging test seen, on the basis of its mathematical model is analyzed, formulates corresponding testing program, by its mathematics Model is analyzed, and with reference to the characteristic feature of vehicle monitor terminal, formulates corresponding differentiation testing program, it is accelerated Aging life-span is tested, and to shorten the test period, is improved test efficiency, is reduced experimentation cost.
Embodiment
The present invention is got information about to allow those skilled in the art to become apparent from, the present invention will be made below further Explanation.
A kind of new-energy automobile vehicle monitor terminal life testing method based on Coffin-Manson models, product exist It is generally in actual use in the temperature environment of multiple changes, generally chooses several typical temperature spots by counting；
Lawson models are generally used for simulation vehicle electronics electric components and are continuously put down in vehicle parking by actual environment Accelerated test that equal hygro-thermal stress influences, generally use steady state damp heat test carry out accelerated ageing；Lawson moulds are provided first The accelerated factor algorithmic formula (1) of type：
In formula:AT/RHAccelerated factor of-certain product on vehicle under the mean temperature of actual environment, humidity, it is the temperature, wet The installation site spent generally with product on vehicle is related；EAThe activation energy of-product failure reaction, with Arrhenius models Middle value is consistent；K- Boltzmann constants, value are 8.617 × 10e V/ DEG C；TPrufThe acceleration of selection during-progress accelerated test Temperature value, generally corresponds to the maximum operating temperature or maximum storage temperature value of product；TFeld Parken- vehicle normally parks condition The average temperature value of lower product installation site, the value are usually statistical value；B- constants, value are 5.57 × 10；RHPruf- accelerate The humidity value defined during experiment；RHFeld ParkenThe medial humidity value of product installation site, the value under the conditions of-vehicle is normally parked Usually statistical value；
The algorithmic formula (2) based on the Lawson model accelerated aging test times is given below：
In formula:tPruf--- the accelerated aging test time；tFeld Parken--- product is idle during projected life Time, generally takes its limiting value, i.e., the situation that product is not run in its life cycle.
Calculated based on Lawson models accelerated test
According to engineering experience and associated international standards regulation, installed in the average phase of the auto parts and components of passenger car passenger compartment It is 60%RH to humidity, mean temperature is 23 DEG C, i.e. TFeld ParkenFor 23 DEG C, RHFeld ParkenFor 60%RH.In order to certain Accelerate aging speed in degree, be set under 65 DEG C of temperature, relative humidity 95%RH and tested here, i.e. TPrufFor 65 DEG C, RHPrufFor 95%RH, it can show that the Lawson models accelerated factor under the conditions of this is 129.5 according to formula (1).
As it was noted above, off position time i.e. its time projected life of the vehicle monitor terminal is given tacit consent to here, i.e., tFeld ParkenFor 5 (year) × 365 (my god) × 24=43800h, which can be calculated according to formula (2) and be based on The accelerated test time of Lawson models is 338.2h.
Verification experimental verification
In order to verify the validity of the accelerated aging test method based on above-mentioned model in text, encapsulated from a collection of aluminium casing Vehicle monitor terminal sample in randomly select 3 samples of A, B, C and carry out accelerated aging tests according to 3 kinds of accelerated methods respectively. In order to carry out Experimental Comparison, the identical humiture case of specification performance parameter is selected in 3 experiments, warm variable Rate can reach 4 DEG C/ Min, can meet requirement of the Lawson models to warm variable Rate；Temperature range is -40~150 DEG C, can cover 3 class accelerated tests Temperature requirement；Humidity range is 10%RH~98%RH, can meet requirement of the Lawson models to humidity range, the space of babinet For 1m.Functional test is carried out to 3 samples first before experiment, its function is in as defined in ISO 16750-1 A grades.
A products its function of repetition measurement after the Arrhenius high temperature accelerated aging tests of experience about 506h, still in A grades；B Product its function of repetition measurement after the Lawson temperature alternating accelerated aging tests of experience about 270h, still in A grades；C products are passing through Its function of repetition measurement after the Lawson Steadydamp-heat accelerated aging tests of about 339h is gone through, still in A grades.It thus is seen that accelerating always Change effect on the premise of, the temperature alternating accelerated aging test method based on Lawson models, time-consuming shorter, cost is more It is low.
In order to assess the service life of vehicle monitor terminal this new-energy automobile security control critical component, to ensure It can provide reliable and stable work in the statement cycle, herein by the normal of experiment of high-temperature load of the introducing based on Lawson models The physics accelerated aging test seen, on the basis of its mathematical model is analyzed, formulates corresponding testing program, by its mathematics Model is analyzed, and with reference to the characteristic feature of vehicle monitor terminal, formulates corresponding differentiation testing program, it is accelerated Aging life-span is tested, and to shorten the test period, is improved test efficiency, is reduced experimentation cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention With within principle, any modification, equivalent replacement, improvement and so on, should all be included in the protection scope of the present invention god.

Claims (1)

  1. A kind of 1. new-energy automobile vehicle monitor terminal life testing method based on Lawson models, it is characterised in that product It is generally in actual use in the temperature environment of multiple changes, generally chooses several typical temperature spots by counting；
    The accelerated factor algorithmic formula (1) of Lawson models is provided first：
    <mrow> <msub> <mi>A</mi> <mrow> <mi>T</mi> <mo>/</mo> <mi>R</mi> <mi>H</mi> </mrow> </msub> <mo>=</mo> <mi>exp</mi> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <mo>&amp;lsqb;</mo> <mo>-</mo> <mrow> <mo>(</mo> <mfrac> <msub> <mi>E</mi> <mi>A</mi> </msub> <mi>k</mi> </mfrac> <mo>)</mo> </mrow> <mrow> <mo>(</mo> <mfrac> <mn>1</mn> <msub> <mi>T</mi> <mrow> <mi>Pr</mi> <mi>u</mi> <mi>f</mi> </mrow> </msub> </mfrac> <mo>-</mo> <mfrac> <mn>1</mn> <msub> <mi>T</mi> <mrow> <mi>F</mi> <mi>e</mi> <mi>l</mi> <mi>d</mi> <mi>P</mi> <mi>a</mi> <mi>r</mi> <mi>k</mi> <mi>e</mi> <mi>n</mi> </mrow> </msub> </mfrac> <mo>)</mo> </mrow> <mo>&amp;rsqb;</mo> <mo>+</mo> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>b</mi> <mo>&amp;lsqb;</mo> <msup> <mrow> <mo>(</mo> <msub> <mi>RH</mi> <mrow> <mi>Pr</mi> <mi>u</mi> <mi>f</mi> </mrow> </msub> <mo>)</mo> </mrow> <mn>2</mn> </msup> <mo>-</mo> <msup> <mrow> <mo>(</mo> <msub> <mi>RH</mi> <mrow> <mi>F</mi> <mi>e</mi> <mi>l</mi> <mi>d</mi> <mi>P</mi> <mi>a</mi> <mi>r</mi> <mi>k</mi> <mi>e</mi> <mi>n</mi> </mrow> </msub> <mo>)</mo> </mrow> <mn>2</mn> </msup> <mo>&amp;rsqb;</mo> </mrow> </mtd> </mtr> </mtable> </mfenced> </mrow>
    In formula:AT/RHAccelerated factor of-certain product on vehicle under the mean temperature of actual environment, humidity, the temperature, humidity one As installation site with product on vehicle it is related；EAThe activation energy of-product failure reaction；K- Boltzmann constants, value For 8.617 × 10e V/ DEG C；TPrufThe acceleration temperature value of selection during-progress accelerated test, generally corresponds to the highest work of product Temperature or maximum storage temperature value；TFeld ParkenThe average temperature value of product installation site under the conditions of-vehicle is normally parked, the value Usually statistical value；B- constants, value are 5.57 × 10；RHPrufThe humidity value defined during-accelerated test；RHFeld Parken- car It is normal park under the conditions of product installation site medial humidity value, which is usually statistical value；
    The algorithmic formula (2) based on the Lawson model accelerated aging test times is given below：
    <mrow> <msub> <mi>t</mi> <mrow> <mi>Pr</mi> <mi>u</mi> <mi>f</mi> </mrow> </msub> <mo>=</mo> <mfrac> <msub> <mi>t</mi> <mrow> <mi>F</mi> <mi>e</mi> <mi>l</mi> <mi>d</mi> <mi>P</mi> <mi>a</mi> <mi>r</mi> <mi>k</mi> <mi>e</mi> <mi>n</mi> </mrow> </msub> <msub> <mi>A</mi> <mrow> <mi>T</mi> <mo>/</mo> <mi>R</mi> <mi>H</mi> </mrow> </msub> </mfrac> </mrow>
    In formula:tPruf--- the accelerated aging test time；tFeld Parken--- product idle time during projected life, Generally take its limiting value, i.e., the situation that product is not run in its life cycle.
CN201711349169.8A 2017-12-15 2017-12-15 New-energy automobile vehicle monitor terminal life testing method based on Lawson models Withdrawn CN108037391A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111208447A (en) * 2020-03-06 2020-05-29 上海度普新能源科技有限公司 Power module test system
CN113447237A (en) * 2021-06-08 2021-09-28 奇瑞汽车股份有限公司 Reliability test method of vehicle-mounted fatigue monitoring system

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CN101963636A (en) * 2009-07-24 2011-02-02 北京圣涛平试验工程技术研究院有限责任公司 Method for evaluating long life of component
CN102096034A (en) * 2009-12-11 2011-06-15 深圳帝光电子有限公司 Method and system for testing LED life

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
CN101963636A (en) * 2009-07-24 2011-02-02 北京圣涛平试验工程技术研究院有限责任公司 Method for evaluating long life of component
CN102096034A (en) * 2009-12-11 2011-06-15 深圳帝光电子有限公司 Method and system for testing LED life

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111208447A (en) * 2020-03-06 2020-05-29 上海度普新能源科技有限公司 Power module test system
CN113447237A (en) * 2021-06-08 2021-09-28 奇瑞汽车股份有限公司 Reliability test method of vehicle-mounted fatigue monitoring system

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