CN107064665B - Electronic product combined stress strenuous test method - Google Patents
Electronic product combined stress strenuous test method Download PDFInfo
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- CN107064665B CN107064665B CN201611087312.6A CN201611087312A CN107064665B CN 107064665 B CN107064665 B CN 107064665B CN 201611087312 A CN201611087312 A CN 201611087312A CN 107064665 B CN107064665 B CN 107064665B
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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
- G01R31/003—Environmental or reliability tests
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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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
Abstract
The present invention relates to a kind of electronic product combined stress strenuous test methods, belong to electronic product experimental technique field.1) present invention clearly proposes strenuous test section of the armored vehicle electronic product based on combined stress: forming combined stress by Wen Xun, vibration, electric stress；2) testing program the clear application scheme given temperature stress in combined stress strenuous test section: is followed using quick temperature；3) the clear application scheme given vibration stress in combined stress strenuous test section: random vibration test scheme is used.The present invention is in excitation product reliability weak spot, in addition to the sport car verification method of outfield, provides a kind of testing program of rack verifying, reduces the dependence to vehicle；The product risks point that moved forward control, reduces the lead time；It can more precisely, efficiently carry out reliability weakness point location and rectify and improve.
Description
Technical field
The present invention relates to electronic product experimental technique fields, and in particular to a kind of electronic product combined stress strenuous test side
Method.
Background technique
With the strong trend of intelligent, the full electrification development of vehicle, the quantity of vehicle electronics component increases swift and violent, component
Inside chip quantity, integrated difficulty also show exponential curve ascendant trend, and there are special, critical after complicated circuit combination in addition
Under the conditions of the unpredictable phenomenon such as jump, drift, failure, if without special reliability design and verification experimental verification, integrated level
Its reliability level of higher electronic product theoretically will be lower.
Combined stress strenuous test belongs to the investigation test for promoting product reliability design, fail-safe analysis.By mentioning
The environmental stress (high temperature, low temperature, shock and vibration, damp and hot) and electric stress of high product test, reach exposing product in a short time
The purpose of function and performance weak spot, and then technical improvements are formulated, to improve product reliability, the reliability of product is increased
Length has great importance.
There are the following problems for current similar test:
1) research field not yet forms the bench test scheme of current combined stress strenuous test, and shortage can be executed specifically
Test method and foundation；
2) five tests (high temperature, low temperature, shock and vibration, damp and hot) are all performance verification tests asynchronous, in short-term, insufficient
With the reliability of comprehensive assessment product；
3) particularity of armor products, each parameter of the field electronic product strenuous test strengthens index can not be referring to boat
The military industry fields such as sky, space flight, ship.Excessively high reinforcing index will result directly in the irreversible damage of product；Too low reinforcing index
The purpose of reinforcing, acceleration is not achieved, intensifier defines difficulty, lacks engineering experience.
Summary of the invention
(1) technical problems to be solved
The technical problem to be solved by the present invention is a kind of electronic product combined stress strenuous test method how is designed, with
Reduce the dependence to vehicle；Move forward the control of product risks point, reduces the lead time, and it is weak more precisely, efficiently to carry out reliability
Point location and rectification.
(2) technical solution
In order to solve the above-mentioned technical problems, the present invention provides a kind of electronic product combined stress strenuous test method, packets
Include following steps:
A. test item is rigidly connected on the vibration table in three combined test chambers, and ensures test item surrounding flow energy
It is enough to flow freely；
B. temperature sensor is arranged on the focus inside test item, control is reliably pasted with vibrating sensor
On the control point of selection, monitoring vibrating sensor is arranged at determining focus in vibratory response measurement；
C. test equipment is connected by test request, and room temperature is powered test before being tested test item, determines subject
Product function and performance are normal；
D. temperature change stress is applied to test item, vibration stepstress, and synchronous application electric stress is applied to test item；
E. the variation of electric stress is paid attention to during fast temperature fluctuating stress and vibration stress apply；
F. when overproof performance or function forfeiture occurs in test item, stop vibration, and suspend test；If since vibration is drawn
When overproof performance or function forfeiture occurs in the test item risen, then g-l is executed, g '~j ' is otherwise executed；
G. vibration stress is reduced to initial vibration magnitude；
H. confirm whether function, the performance of test item can be restored, and carry out accident analysis, positioning and reparation failure, if not
It can repair and then be replaced；
I. after repairing or replace, monitoring is installed additional on point corresponding with point is repaired after the reparation point of vibration table or replacement and is used
Vibrating sensor；
J. vibration level when directly overproof to test item applying performance or function is lost, verifies the validity of reparation；
K. if fault point is caused by being concentrated due to stress or is resonance point, the fault point is moved from test item at this time
Out, point damage is again resulted in avoid vibrational excitation；
L. return step f, until having found the fault point of predetermined number, or the stress applied is sufficiently large, then terminates to try
It tests；
Temperature stress is restored to room temperature by g ', and can the work of observation test item restore normal after temperature is stablized；
H ' illustrates that test item has damaged if test item can not restore corresponding function and performance, carries out fault location and repairs
It is multiple, again before investment test, the protection of anti-fast temperature variation is carried out to the fault point of reparation, it also can not be into if can not repair
Row protection is then replaced；If test item function and performance recovery are normal, illustrate that temperature change stress does not cause not test item
Reversible damage is analyzed and is positioned to possible fault point, if can position, carries out anti-fast temperature to fault point
The protection of variation, again investment test；If cannot rely on analysis to be positioned, test is direct plungeed into, it is believed that have found weakness
Point, and the weak spot is excited into fault point；
J ' return step f then terminates to test until having found the weak spot of predetermined number.
Preferably, in step a, the vibration table that test item is rigidly connected to by test fixture in three combined test chambers
On.
Preferably, in step e, the variation of the electric stress includes the variation of electric current, voltage and power.
Preferably, in step h ', the guard method of anti-fast temperature variation are as follows: coating heat resistant material.
Preferably, the electronic product is armored vehicle electronic product.
(3) beneficial effect
The present invention in addition to the sport car verification method of outfield, provides a kind of rack in excitation product reliability weak spot
The testing program of verifying reduces the dependence to vehicle；The product risks point that moved forward control, reduces the lead time；It can be more
Precisely, reliability weakness point location and rectification are efficiently carried out.
Detailed description of the invention
Fig. 1 is fast temperature cyclic test section；
Fig. 2 is creeper truck typical case spectral pattern (random vibration) in GJB150.16A；
Fig. 3 is that combined stress strenuous test recycles section.
Specific embodiment
To keep the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to of the invention
Specific embodiment is described in further detail.
The embodiment of the invention provides a kind of armored vehicle electronic product combined stress strenuous test methods, including following step
It is rapid:
A. test item is rigidly connected on the vibration table in three combined test chambers by test fixture, and ensures to be tested
Product surrounding flow can flow freely；
B. temperature sensor is arranged on the focus inside test item (multiple spot as far as possible, to determine the temperature of test item
Stable state), control is reliably pasted on the control point of selection with vibrating sensor, is determined in vibratory response measurement
Monitoring vibrating sensor is arranged at focus；
C. test equipment is connected by test request, and room temperature is powered test before being tested test item, determines subject
Product function and performance are normal；
D. temperature change stress is applied to test item by Fig. 1, vibration stepping is applied to test item by Fig. 2,1 condition of table and is answered
Power, and apply electric stress by Fig. 3 is synchronous；
The narrow-band random vibration program data of 1 creeper truck of table fastening cargo
Fig. 1 explanation: if the low-temperature working limit of armored vehicle electronic product is -55 DEG C；The hot operation limit is 85 DEG C.
Consider that the surplus of the temperature cycles process of product, the general low-temperature working limit are set as -50 DEG C, the hot operation limit is set as 80 DEG C.
According to the common method that fast temperature pulsating stress is tested, circulating path is the circulation of " low temperature --- high temperature --- low temperature ... "
Test, warm variability is typically no less than 15 DEG C/min (faster temperature cycles stress induces stronger), to meet wanting for test effect
It asks, needs to carry out 11 temperature cycling tests；The nominal value of electric stress is 28V, upper limit value 33V, lower limit value 20V, is powered
Sequence should be according to " upper limit value --- nominal value --- lower limit value --- nominal value --- upper limit value ... ".Consider product testing
Time, efficiency and expense.Temperature cycling test design in the product combined stress strenuous test is as follows: cryogenic temperature: -50
℃；High-temperature temperature: 80 DEG C；Rate temperature change: 15 DEG C/min；Each temperature stablizes the residence time: 60min；When product testing
Between: 10min (product need to switch 5 times).
Fig. 2, table 1 illustrate: groping by demonstration and test, armored vehicle electronic product stepping vibrates spectral pattern and is suitble to reference
The typical random spectral pattern of 5-500Hz creeper truck in C.4 is schemed in GJB150.16A, vibration data selects table, and D.1 creeper truck fastens cargo
Narrow-band random vibration data magnitude is stepped up with the data bit primary data in table.It is every after increasing 10% to 150% every time
It is secondary to increase 5%, until product failure or to the 170% of original magnitude.Step-length: the 10% of initial magnitude is vibrated, after increasing to 150%
Step-length uses 5%；Residence time: 10min is stablized in each vibration；The product testing time: 10min (product need to switch 5 times)；Test
The vibration fault or test magnitude for continueing to test item then stop testing to original 170%.
Fig. 3 explanation: according to the common method of combined stress strenuous test, usually based on temperature cycles, vibration stepping,
It is tested under the generalized section that electric stress circulation applies.Temperature cycles apply according to Fig. 1 fast temperature pulsating stress, vibration step
Applied into stress according to the type spectrum and data of Fig. 2 and table 1, electric stress should be according to " upper limit value --- nominal value --- lower limit
Value --- nominal value --- upper limit value ... " is applied.Consider that product does not power on when low temperature simultaneously, keeps on product when high temperature
Electricity powers on opportunity.
E. pay attention to the variation of electric stress during fast temperature fluctuating stress and vibration stress apply, including electric current,
The variation of voltage and power；
F. when test item occurs that performance is overproof or function loses, stop vibration, and suspend test (do not influence it is safe
In the case of allow test item not power off as far as possible)；If there is overproof performance or function forfeiture due to test item caused by vibrating, then
G-l is executed, g '~j ' is otherwise executed；
G. vibration stress is reduced to initial vibration magnitude；
H. confirm whether function, the performance of test item can be restored, and carry out accident analysis, positioning and reparation failure, if not
It can repair and then be replaced；
I. after repairing or replace, add (or near) on the corresponding point of point after the reparation point of vibration table or replacement with repairing
Monitoring vibrating sensor is filled, to understand the vibratory response situation of fault point on test item；
J. vibration level when directly overproof to test item applying performance or function is lost, verifies the validity of reparation；
K. if fault point is caused by being concentrated due to stress or is resonance point, the fault point is moved from test item at this time
Out, point damage is again resulted in avoid vibrational excitation；
L. return step f, until having found the fault point (weak link) of predetermined number, or the stress applied is enough
Greatly, then terminate to test；
Temperature stress is restored to room temperature by g ', after temperature is stablized the work of observation test item can restore it is normal (can be to subject
Product carry out restarting observation)；
H ' illustrates that test item has damaged if test item can not restore corresponding function and performance, carries out fault location and repairs
It is multiple, again before investment test, the protection of the anti-fast temperature variation of coating heat resistant material is carried out to the fault point of reparation, if nothing
Method reparation can not also be protected, and be replaced；If test item function and performance recovery are normal, illustrate temperature change stress pair
Test item does not cause irreversible damage, and possible fault point is analyzed and positioned, if can position, to fault point
Carry out the protection of the anti-fast temperature variation of coating heat resistant material, again investment test；If cannot rely on analysis to be positioned,
Direct plunge into test, it is believed that have found weak spot, and the weak spot is excited into fault point；
J ' return step f then terminates to test until having found the weak spot (link) of predetermined number.
Reliability test of this method based on electronic product is theoretical, requires according to product design and use environment feature,
In conjunction with long-term engineering groping experience, a kind of engineer application method for proposing combined stress strenuous test is concluded.
The present invention is the foundations such as use environment, electrical characteristic, related national military standard based on armored vehicle electronic product, reference
The industry testing program in the fields such as Aeronautics and Astronautics, ship fully considers the harsh temperature of armored vehicle electronic product, vibration, electricity
The exclusive feature such as stress, after largely groping the verification experimental verification of test and model project, conclusion proposes a kind of suitable
Together in armored vehicle electronic product based on the combined stress strenuous test scheme of quick Wen Xun, random vibration and electric stress and examination
Proved recipe method, and each test procedure and key parameter numerical value are clearly given, there is stronger engineering operability.The testing program
Test profile is not only bonded real vehicle use environment as far as possible, but also joined combined stress intensifier appropriate, has reached and has passed through rack
Test, utilization test period as few as possible spend testing expenses as few as possible, and exposure analog equipment is accelerated to use in real vehicle
Reliability weak spot that may be present in environment shortens and searches design deficiency/hidden danger time, promotes project development efficiency.
The embodiment of the present invention 1) clearly propose strenuous test section of the armored vehicle electronic product based on combined stress: by
Wen Xun, vibration, electric stress form combined stress；2) the clear application given temperature stress in combined stress strenuous test section
Scheme: testing program is followed using quick temperature；3) the clear application side given vibration stress in combined stress strenuous test section
Case: random vibration test scheme is used；4) the clear application scheme given electric stress in combined stress strenuous test section: comprehensive
It closes national military standard, real vehicle operating condition and strengthens many factors such as examination, conclude and propose dedicated electrical stress test scheme；5) it is clear given
By each key parameter numerical value under the combined stress strenuous test section of abundant engineering verification: the heating rate of quick Wen Xun, height
Warm cut off, low temperature cut off；Step stride, the cut off of random vibration；Upper limit value, lower limit value of electric stress etc..
The present invention can generate it is following the utility model has the advantages that
1, in excitation product reliability weak spot, in addition to the sport car verification method of outfield, a kind of rack verifying is provided
Testing program, reduce the dependence to vehicle.
2, Forward product risks point control, reduces the lead time.
Combined stress strenuous test was carried out in the development stage, and " model machine completion --- strenuous test --- exposure/fixed is taken
Position reliability weak spot --- Curve guide impeller/technique --- return verifying --- new product improvement --- product export to deliver "
Experiment process changes former " product export delivery --- vehicle general assembly --- sport car failure --- live troubleshooting/depot repair ---
Reassemble sport car verifying " process, the risk point of product is controlled Forward, significantly reduces product development cycle.
3, more accurate, efficient reliability weakness point location and rectification.
Combined stress strenuous test is to carry out the complete of combined stress by equipment such as dedicated test tooling, three multi-function test stands
Face injection, working condition overall monitor implement.The injection of environmental stress and electric stress is from normal stress gradually step
What formula was applied, step stride and time according to fault location can be adjusted flexibly, and reach precisely determination and cause
Environmental stress or electric stress condition when failure.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (5)
1. a kind of electronic product combined stress strenuous test method, which comprises the following steps:
A. test item is rigidly connected on the vibration table in three combined test chambers, and ensures that test item surrounding flow can be certainly
By flowing；
B. temperature sensor is arranged on the focus inside test item, control is reliably pasted onto choosing with vibrating sensor
On the control point selected, monitoring vibrating sensor is arranged at determining focus in vibratory response measurement；
C. test equipment is connected by test request, and room temperature is powered test before being tested test item, determines test item function
It can be normal with performance；
D. temperature change stress is applied to test item, vibration stepstress, and synchronous application electric stress is applied to test item；
E. the variation of electric stress is paid attention to during temperature change stress and vibration stepstress apply；
F. when overproof performance or function forfeiture occurs in test item, stop vibration, and suspend test；If due to caused by vibration
When overproof performance or function forfeiture occurs in test item, then g-l is executed, g '~j ' is otherwise executed；
G. vibration stress is reduced to initial vibration magnitude；
H. confirm whether function, the performance of test item can be restored, and carry out accident analysis, positioning and reparation failure cannot such as repair
It is multiple then replaced；
I. after repairing or replace, monitoring vibrating sensor is installed additional on point corresponding with point is repaired after the reparation of vibration table；
J. vibration level when directly overproof to test item applying performance or function is lost, verifies the validity of reparation；
K. if fault point is caused by being concentrated due to stress or is resonance point, the fault point is removed from test item at this time, with
Vibrational excitation is avoided to again result in point damage；
L. return step f, until having found the fault point of predetermined number, or the stress applied is sufficiently large, then terminates to test；
Temperature stress is restored to room temperature by g ', and can the work of observation test item restore normal after temperature is stablized；
H ' illustrates that test item has damaged if test item can not restore corresponding function and performance, carries out fault location and reparation,
Again before investment test, the protection of anti-fast temperature variation is carried out to the fault point of reparation, if can not repair can not also carry out
Protection is then replaced；If test item function and performance recovery are normal, illustrating that temperature change stress does not cause test item can not
The damage of reverse is analyzed and is positioned to possible fault point, if can position, carries out anti-fast temperature change to fault point
The protection of change, again investment test；If cannot rely on analysis to be positioned, test is direct plungeed into, it is believed that weak spot is had found,
And the weak spot is excited into fault point；
J ' return step f then terminates to test until having found the weak spot of predetermined number.
2. the method as described in claim 1, which is characterized in that in step a, test item is rigidly connected to by test fixture
On vibration table in three combined test chambers.
3. the method as described in claim 1, which is characterized in that in step e, the variation of the electric stress includes electric current, voltage
With the variation of power.
4. the method as described in claim 1, which is characterized in that in step h ', the guard method of anti-fast temperature variation are as follows: apply
Apply heat resistant material.
5. method according to any one of claims 1 to 4, which is characterized in that the electronic product is armored vehicle electronics
Product.
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| CN107782995A (en) * | 2017-10-23 | 2018-03-09 | 中国北方车辆研究所 | A kind of electronic product combined stress is known the real situation test method |
| CN108593235A (en) * | 2018-04-27 | 2018-09-28 | 成都麦隆电气有限公司 | A kind of test method and test system |
| CN109540559A (en) * | 2018-11-27 | 2019-03-29 | 上海航天计算机技术研究所 | A kind of stress resultant screening test method being applicable in on-board equipment |
| CN110068436B (en) * | 2019-04-04 | 2021-03-30 | 航天科工防御技术研究试验中心 | Vibration control implementation method and device for thermal vibration detection |
| CN111062183A (en) * | 2020-03-06 | 2020-04-24 | 北京强度环境研究所 | Multi-stress strengthening test profile compiling method and device and computer storage medium |
| CN111504629A (en) * | 2020-05-09 | 2020-08-07 | 上海华碧检测技术有限公司 | Alternative test method for traditional type test of electronic connector |
| CN112213128B (en) * | 2020-06-11 | 2022-11-11 | 广东科鉴检测工程技术有限公司 | Test method for rapidly improving reliability of instrument and equipment |
| CN112362277B (en) * | 2020-10-28 | 2023-03-24 | 北京机电工程研究所 | Comprehensive test method for aircraft |
| CN112697456A (en) * | 2020-12-10 | 2021-04-23 | 奇瑞汽车股份有限公司 | Reliability test method for automobile circuit system |
| CN112684324A (en) * | 2020-12-30 | 2021-04-20 | 无锡市同步电子科技有限公司 | Method for rapidly exciting and verifying faults of PCB for airborne electronic controller |
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