CN107655635A - A kind of waterproof detection method and waterproof reliability checking method - Google Patents
A kind of waterproof detection method and waterproof reliability checking method Download PDFInfo
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- CN107655635A CN107655635A CN201710850767.7A CN201710850767A CN107655635A CN 107655635 A CN107655635 A CN 107655635A CN 201710850767 A CN201710850767 A CN 201710850767A CN 107655635 A CN107655635 A CN 107655635A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
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Abstract
The present invention proposes a kind of waterproof detection method and waterproof reliability checking method, belongs to waterproof detection technique field.The waterproof detection method comprises the following steps：First gas is filled with the cavity to be measured of product to be measured, until the gas pressure in cavity to be measured reaches target waterproofing pressure；Wherein, product to be measured is placed in second gas；Search gas is included in first gas, the search gas is not contained in second gas；Detect the concentration of search gas by product to be measured；The water resistance of product to be measured is judged according to concentration.The waterproof reliability checking method comprises the following steps：According to waterproof detection method, confirm that the water resistance of product to be measured is qualified；Environmental reliability accelerated test is carried out to product to be measured；Waterproof detection method is carried out to product to be measured again, judges the waterproof reliability of product to be measured.The present invention can simply and effectively detect product water resistance and waterproof unfailing performance, cost it is relatively low.
Description
Technical field
The invention belongs to waterproof detection technique field, is related to a kind of detection method, especially a kind of waterproof detection method and
Waterproof reliability checking method.
Background technology
At present the classification of waterproof of many waterproof products IP66 and more than, according to the detection method of current standard, it is necessary to specially
The flushing device bath of door, or it is dipped to not a half hour at 1 meter or 3 meters under water, torn open after then product is taken out
Unload, checked after opening product cavity either with or without water inlet.This detection method wastes time and energy, for production in enormous quantities especially not
Profit；Need to purchase flushing device and brew water place, cost is higher；Meanwhile disassembly and reassembly is carried out after product is soaked,
Easily great quality risk is brought to product.
In addition, many waterproof products are good using water resistance at initial stage in product, but water proofing property in use for some time
It can decline, water inlet drainage occur, it is not carry out effective waterproof reliability testing to product to verify to trace it to its cause.
The content of the invention
A kind of simple to operate it is a primary object of the present invention to provide, cost is relatively low, product quality is influenceed less anti-
Water detection method, secondary objective are to provide a kind of effective waterproof reliability checking method.
In order to achieve the above object, solution of the invention is：
A kind of waterproof detection method, comprises the following steps：
(1) first gas is filled with the cavity to be measured of product to be measured, until the gas pressure in cavity to be measured reaches mesh
Mark waterproofing pressure；Wherein, the product to be measured is placed in second gas；Search gas is included in first gas, for detection
The leakage situation of first gas, the search gas is not contained in second gas；
(2) concentration of the search gas by product to be measured is detected；
(3) water resistance of the product to be measured is judged according to the concentration.
Referred in the step (2) by product to be measured around product to be measured in the range of n cm distances, n is more than 0；It is preferred that
Ground, referred to by product to be measured around product to be measured in the range of 5 centimetres in the step (2).
The step (3) includes：When the concentration is more than concentration threshold, judge that the water resistance of product to be measured does not conform to
Lattice；When the concentration is less than or equal to the concentration threshold, judge that the water resistance of product to be measured is qualified；Wherein, it is described dense
Degree threshold value is setting value.
First gas is the mixed gas being made up of the hydrogen of 5% (volume ratio) and the nitrogen of 95% (volume ratio)；Second
Gas is air.
Also include before the step (1)：The water joint of product to be measured is opened, empties the cavity to be measured of product to be measured
Interior existing gas, then tighten the closing water joint；Air injection pipe is accessed at gas injection port, and reinforces the week of the air injection pipe
Enclose to prevent gas leakage；Wherein, the air injection pipe is used for the injection first gas in the step (1).
Be provided with air intake valve on the passage of gas injection, in the step (1) by the pressure of the first gas of injection
Power is controlled in the target waterproofing pressure.
When gas pressure in the step (1) in cavity to be measured reaches target waterproofing pressure, in the cavity to be measured only
Contain first gas.
A kind of waterproof reliability checking method based on above-mentioned waterproof detection method, comprises the following steps：
(1) according to waterproof detection method, confirm that the water resistance of product to be measured is qualified；
(2) environmental reliability accelerated test is carried out to product to be measured；
(3) waterproof detection method is carried out to product to be measured again, judges the waterproof reliability of product to be measured.
In the step (3), when the result for carrying out waterproof detection method to product to be measured again shows the anti-of product to be measured
It is water-based when can be qualified, judge the waterproof reliability compliance of product to be measured；When again to product to be measured progress waterproof detection method
When as a result showing that the water resistance of product to be measured is unqualified, judge that the waterproof reliability of product to be measured is unqualified.
The step (2) includes：
(21) accelerated factor is calculated, formula is：
AFT=(Δ Tt/ΔTu)m
Wherein：AFTFor accelerated factor；
ΔTtFor environmental reliability accelerated test when product to be measured environment temperature variable quantity；
ΔTuFor product normal work to be measured when internal operating temperature and environment temperature difference；
M is the failure mechanism constant of product to be measured；
(22) cycle-index of son test is circulated in computing environment reliability accelerated test, formula is：
Nt=Nu/AFT
Wherein：Nt is the cycle-index that son test is circulated in environmental reliability accelerated test；
Nu is the projected life of product to be measured；
(23) Nt circulation son test is carried out to product to be measured；
(24) waterproof detection is carried out to product to be measured again according to the waterproof detection method；
Wherein, the environmental reliability accelerated test includes repeatedly circulation test.
Preferably, the circulation test is tested for high/low-temperature impact；Preferably, Nu is represented with on-off times；Preferably,
M value depends on the type of product to be measured；It is further preferred that the product to be measured is electronic product, m 2.
Due to using such scheme, the beneficial effects of the invention are as follows：Waterproof detection method of the present invention uses gas detection method
Traditional bath method and soaked method are instead of, the waterproof detection time of product to be measured was reduced into a few minutes by least 30 minutes,
Flushing device need not be purchased and brew water place, greatly save time and the expense of detection；Meanwhile the waterproof detection method
Do not need disassembly and reassembly product to be measured, eliminate product to be measured it is soaked after the product matter brought of disassembly and reassembly
Measure risk.The waterproof method for testing reliability of the present invention, by product actual application environment to be measured and life requirements, carry out reliable
Property acceleration environment test, waterproof detection is carried out again to the product to be measured after test, after effectively demonstrating product long-term use
Waterproof reliability, establish the thoroughly evaluating system to product waterproof property to be measured.
Brief description of the drawings
Fig. 1 is the flow chart of waterproof detection method in the embodiment of the present invention；
Fig. 2 is the flow chart of waterproof reliability checking method in the embodiment of the present invention.
Embodiment
The present invention will be further described with reference to the accompanying drawings.
The present invention proposes a kind of waterproof detection method.The waterproof detection method comprises the following steps：
(1) water joint of product to be measured is opened；Empty existing gas in the cavity to be measured of product to be measured；Tighten closing
Water joint.
Air injection pipe is accessed at gas injection port, and is reinforced around air injection pipe and air intake valve is to prevent gas leakage.
Wherein, air injection pipe is used for the injection first gas in following step (2).Air intake valve is arranged on the passage of gas injection
On, for control gas pressure, such as in following step (2) by the Stress control of the first gas of injection in target
Waterproofing pressure.Water joint is used for as the exhaust outlet for discharging existing gas in cavity to be measured.
(2) first gas is injected in the cavity to be measured of product to be measured, until the gas pressure in cavity to be measured reaches mesh
Mark waterproofing pressure (now only containing first gas in cavity to be measured).
Wherein, product to be measured is placed in second gas.Search gas is included in first gas, for detecting first gas
Leakage situation, do not contain such search gas in second gas.
It is nontoxic, the easily detection and higher gas of cost performance is suitably used as first gas.In the present embodiment, the first gas
Body is the mixed gas being made up of the hydrogen of 5% (volume ratio) and the nitrogen of 95% (volume ratio).Second gas is air.Its
In, the search gas using the hydrogen of low concentration safety as detection gas leakage, so as to use hydrogen detection probe detection hydrogen
Air leakage detected.
During actual progress, by the pressure that the conversion pressure of classification of waterproof water is similar gas, such as：
When the classification of waterproof requirement to product to be measured is IP67, because IP67 represents pressure caused by one meter of deep water, meter
The pressure for calculating one meter of deep water is 0.01MPa, and the atmospheric pressure of a standard is equal to 0.1MPa, thus IP67 classification of waterproof
It is that above-mentioned target waterproofing pressure is 0.1 standard atmospheric pressure corresponding to it is required that.
When the classification of waterproof requirement to product to be measured is IP68, because IP68 represents pressure caused by three meters of deep water, meter
The pressure for calculating three meters of deep water is 0.03MPa, and the atmospheric pressure of a standard is equal to 0.1MPa, thus IP68 classification of waterproof
It is that above-mentioned target waterproofing pressure is 0.3 standard atmospheric pressure corresponding to it is required that.
(3) concentration of search gas in the second gas by product to be measured is detected.
Referred to by above-mentioned product to be measured around product to be measured in the range of n centimetres of distance, n is more than 0.Specifically, originally
In embodiment, referred to by above-mentioned product to be measured around product to be measured in the range of 5 centimetres.
In the present embodiment, the leakage of hydrogen is detected using the probe of hydrogen detection instrument.
(4) water resistance of product to be measured is judged according to the concentration of above-mentioned detection.
Specifically, when the concentration is more than concentration threshold, judge that the water resistance of product to be measured is unqualified；When the concentration is small
When concentration threshold, judge that the water resistance of product to be measured is qualified；Wherein, concentration threshold is setting value.The present embodiment
In, the concentration threshold is 10ppm.For the underproof product to be measured of water resistance detected, its water resistance is defective, needs
Further to check, reprocess or be improved.
Fig. 1 is the flow chart of waterproof detection method in the present embodiment.
Traditional waterproof detection method uses bath method and soaked method, is that to be born under water based on product to be measured is outside
The pressure of water.It is base and above-mentioned waterproof detection method replaces bath method of the prior art and soaked method using gas detection method
If in applying same gas pressure, the examination for the ability to bear of the sealing structure of product to be measured from the inside of product to be measured
It is the same.
The invention also provides a kind of waterproof reliability checking method based on above-mentioned waterproof detection method.The waterproof is reliable
Property detection method comprises the following steps：
(1) according to waterproof detection method, confirm that the water resistance of product to be measured is qualified.
In the present embodiment, the waterproof detection method uses above-mentioned waterproof detection method.
(2) environmental reliability accelerated test is carried out to product to be measured.
Specifically include following steps：
(21) accelerated factor is calculated, formula is：
AFT=(Δ Tt/ΔTu)m
Wherein：AFTFor accelerated factor；
ΔTtFor environmental reliability accelerated test when product to be measured environment temperature variable quantity；
ΔTuFor product normal work to be measured when internal operating temperature and environment temperature difference；
M is the failure mechanism constant of product to be measured.
(22) circulation son test (the present embodiment in computing environment reliability accelerated test (including repeatedly circulation test)
In, circulation son test is tested for high/low-temperature impact) cycle-index, formula is：
Nt=Nu/AFT
Wherein：Nt is that son test (being high/low-temperature impact test in the present embodiment) is circulated in environmental reliability accelerated test
Cycle-index；
Nu is the projected life of product to be measured；
(23) Nt high/low-temperature impact test is carried out to product to be measured, and (environmental reliability accelerated test includes NtSecondary high/low temperature
Shock-testing)；
(24) waterproof detection is carried out to product to be measured again according to above-mentioned waterproof detection method.
In the present embodiment, Nu is represented with on-off times.M value depends on the type of product to be measured, such as product to be measured
For electronic product, m 2.
In the present embodiment, product to be measured is application certain electronic product out of doors, is produced at 25 DEG C of normal temperature during normal work
The internal temperature of product is upgraded to 50 DEG C, i.e. the internal operating temperature of product is 50 DEG C, so as to Δ TuFor 25 DEG C.The environmental reliability adds
Using the high/low-temperature impact test repeatedly circulated, the test of each high/low-temperature impact is that to place 1 at -40 DEG C of low temperature small for speed test
When, it is rapidly heated to placing 1 hour at 85 DEG C, so as to Δ TtFor 125 DEG C.M values are 2.So as to AFT=(125/25)2=25.
Product switch 2 times daily, the life-span is 5 years, therefore its 5 years on-off times used are Nu=2*365*5=
3650, so as to Nt=3650/25=146.
Thus, 146 high/low-temperature impact tests are carried out to the product to be measured, carry out subsequent step after test again.
(3) waterproof detection method is carried out to product to be measured again, judges the waterproof reliability of product to be measured.
When the result for carrying out waterproof detection method to product to be measured again shows that the water resistance of product to be measured is qualified, sentence
The waterproof reliability compliance of disconnected product to be measured；When the result for carrying out waterproof detection method to product to be measured again shows product to be measured
Water resistance it is unqualified when, judge that the waterproof reliability of product to be measured is unqualified.
In the present embodiment, the product to be measured after 146 high/low-temperature impacts are tested was carried out again according to waterproof inspection to above-mentioned
Survey method is detected, if testing result shows that its water resistance is qualified, shows that the waterproof reliability of the product to be measured is closed
Lattice, i.e. its water resistance after long-term use of 5 years are still good.
Fig. 2 is the flow chart of waterproof reliability checking method in the present embodiment.
Above-mentioned waterproof reliability checking method is directed to verifying the waterproof reliability after product long-term use to be measured, according to treating
The application environment and service life of product are surveyed, reliability accelerated test model is established, extrapolates the environmental testing of product to be measured
Acceleration times, carry out waterproof detection again after accelerated test according to acceleration times, make for a long time so as to simplation verification product to be measured
Water resistance after.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using this hair
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to implementation here
Example, for those skilled in the art according to the announcement of the present invention, not departing from improvement that scope made and modification all should be
Within protection scope of the present invention.
Claims (10)
- A kind of 1. waterproof detection method, it is characterised in that：Comprise the following steps：(1) first gas is filled with the cavity to be measured of product to be measured, until the gas pressure in cavity to be measured reaches target and prevented Water pressure；Wherein, the product to be measured is placed in second gas；Search gas is included in first gas, for detection first The leakage situation of gas, the search gas is not contained in second gas；(2) concentration of the search gas by product to be measured is detected；(3) water resistance of the product to be measured is judged according to the concentration.
- 2. waterproof detection method according to claim 1, it is characterised in that：Refer in the step (2) by product to be measured It is around product to be measured in the range of n cm distances, n is more than 0；Preferably, referred in the step (2) by product to be measured around product to be measured in the range of 5 centimetres.
- 3. waterproof detection method according to claim 1, it is characterised in that：The step (3) includes：When the concentration is more than concentration threshold, judge that the water resistance of product to be measured is unqualified；When the concentration is less than or equal to the concentration threshold, judge that the water resistance of product to be measured is qualified；Wherein, the concentration threshold is setting value.
- 4. waterproof detection method according to claim 1, it is characterised in that：First gas is the hydrogen by 5% (volume ratio) The mixed gas of gas and the nitrogen of 95% (volume ratio) composition；Second gas is air.
- 5. waterproof detection method according to claim 1, it is characterised in that：Also include before the step (1)：The water joint of product to be measured is opened, empties existing gas in the cavity to be measured of product to be measured, then tighten described in closing Water joint；Air injection pipe is accessed at gas injection port, and is reinforced around the air injection pipe to prevent gas leakage；Wherein, the gas injection Manage for the injection first gas in the step (1).
- 6. waterproof detection method according to claim 5, it is characterised in that：Air intake valve is provided with the passage of gas injection, For in the step (1) by the Stress control of the first gas of injection in the target waterproofing pressure.
- 7. waterproof detection method according to claim 1, it is characterised in that：Gas in the step (1) in cavity to be measured When body pressure reaches target waterproofing pressure, only contain first gas in the cavity to be measured.
- 8. a kind of waterproof reliability checking method of the waterproof detection method based on any one of claim 1-7, it is special Sign is：Comprise the following steps：(1) according to waterproof detection method, confirm that the water resistance of product to be measured is qualified；(2) environmental reliability accelerated test is carried out to product to be measured；(3) waterproof detection method is carried out to product to be measured again, judges the waterproof reliability of product to be measured.
- 9. waterproof reliability checking method according to claim 8, it is characterised in that：In the step (3), when right again When the result that product to be measured carries out waterproof detection method shows that the water resistance of product to be measured is qualified, the waterproof of product to be measured is judged Reliability compliance；When the result for carrying out waterproof detection method to product to be measured again shows that the water resistance of product to be measured is unqualified When, judge that the waterproof reliability of product to be measured is unqualified.
- 10. waterproof reliability checking method according to claim 8, it is characterised in that：The step (2) includes：(21) accelerated factor is calculated, formula is：AFT=(Δ Tt/ΔTu)mWherein：AFTFor accelerated factor；ΔTtFor environmental reliability accelerated test when product to be measured environment temperature variable quantity；ΔTuFor product normal work to be measured when internal operating temperature and environment temperature difference；M is the failure mechanism constant of product to be measured；(22) cycle-index of son test is circulated in computing environment reliability accelerated test, formula is：Nt=Nu/AFTWherein：Nt is the cycle-index that son test is circulated in environmental reliability accelerated test；Nu is the projected life of product to be measured；(23) Nt circulation son test is carried out to product to be measured；(24) waterproof detection is carried out to product to be measured again according to the waterproof detection method；Wherein, the environmental reliability accelerated test includes repeatedly circulation test；Preferably, the circulation test is tested for high/low-temperature impact；Preferably, Nu is represented with on-off times；Preferably, m value depends on the type of product to be measured；It is further preferred that the product to be measured is electronic product, M is 2.
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Cited By (1)
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