CN104089745B - The test of satellite integral leakage is with picking and placeing sampling device and pick and place sample scaling method - Google Patents
The test of satellite integral leakage is with picking and placeing sampling device and pick and place sample scaling method Download PDFInfo
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- CN104089745B CN104089745B CN201410369471.XA CN201410369471A CN104089745B CN 104089745 B CN104089745 B CN 104089745B CN 201410369471 A CN201410369471 A CN 201410369471A CN 104089745 B CN104089745 B CN 104089745B
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Abstract
Mainly include the cavity with fixed volume the invention discloses the sampling device that picks and places used in a kind of satellite integral leakage test process, cavity top is provided with and communicated with the transverse tube and longitudinal tubule (L tubule) of cross, transverse tube is in cross connectivity structure with the inside of longitudinal tubule (L tubule), transverse tube two ends are used separately as the gas sample mouthful and gas setting-out mouthful of integral leakage test, longitudinal tubule (L tubule) top is provided with controlled valve to be respectively controlled the gas turnover transverse tube in cavity for sampling and setting-out process, it is provided with 0 type sealing ring to prevent gas from being escaped from longitudinal tubule (L tubule) upper end during sample is picked and placeed on the inside of controlled valve and longitudinal tubule (L tubule).The invention also discloses a kind of method for picking and placeing sample using the device.The method is compared with prior art, may be implemented in satellite integral leakage test site quickly carries out the staking-out work of test system, scalar period is shortened, the leak rate deviation of the referance leak caused when environment changes is effectively prevent, the accuracy of test system demarcation is improve.
Description
Technical field
It is more particularly to a kind of the present invention relates to a kind of system calibrating method for satellite accumulative integral leakage test process
By the method for the device and demarcation of minimum gas sampling and setting-out, the demarcation work of test system in integral leakage test process is completed
Make, finally realize the quantitative test work of satellite integral leakage test.
Background technology
With continuing to develop for space technology, to the index demand more and more higher of satellite integral leakage test, required precision is got over
Come higher, satellite integral leakage test job be satellite is filled with leak detection sealing system it is consistent with operating pressure in orbit
Probe gas, is put into probe gas amount of the collection vessel for sealing to leaking and accumulates regular hour t, by collection vessel
The change in concentration A1 of interior probe gas, is measured by the integral leakage of leak detection system with instrument.Its test process belongs to relative measurement,
After needing to demarcate test system, the final integral leakage data of satellite are just can determine that.
The test system scaling method for using at present is demarcated using referance leak, and referance leak calibration process is：
Any probe gas will be not added with the tested sealing system of satellite first, be put into the collection vessel of above-mentioned sealing, put in a reservoir
Referance leak Q1 known to entering 1 leak rate, is accumulated with above-mentioned identical time t, with the leakage of instrument test referance leak
The variable quantity A2 of probe gas amount concentration in collection vessel is caused, by the integral leakage Q=A1 × Q1/A2 of leak detection system.Using mark
Quasi- small opening carries out demarcation and has the characteristics that to test system：
1) leak rate of referance leak is calibrated through metrological service, data reliability；
2) referance leak needs to place and accumulates same satellite same time t in a reservoir, and t is generally more than 24 hours.
Meanwhile, had the following disadvantages during being demarcated to test system using referance leak：
1) scalar period is long, it is necessary to satellite Integrating dosemeters time consistency, generally more than 24 hours；
2) referance leak needs the cycle of professional metrological service's calibration long；
3) deviation of itself leak rate can be caused after the environment that referance leak is used changes, integral leakage can be accumulated most
In whole test data, cause the deviation of test data；
4), generally be directed to the leak rate of the gases such as helium, air, nitrogen, only helium can be as showing gas leakage for referance leak
Body is used.
The present invention proposes that a kind of satellite integral leakage, can be in satellite integral leakage with picking and placeing sampling device and picking and placeing sample scaling method
Test site quickly carries out the staking-out work of test system, can shorten scalar period, when effectively prevent environment and changing
The leak rate deviation of the referance leak for causing, improves the accuracy of test system demarcation, while various probe gas can be realized
Pick and place sample calibration process.
The content of the invention
Picking and placeing sampling device and pick and place sample demarcation side in it is an object of the invention to provide a kind of satellite integral leakage test process
Method.
To achieve these goals, present invention employs following technical scheme:
A kind of satellite integral leakage test is set with connection above sampling device, including the cavity with fixed volume, cavity is picked and placeed
The transverse tube and longitudinal tubule (L tubule) of cross are equipped with, transverse tube is in cross connectivity structure with the inside of longitudinal tubule (L tubule), and transverse tube two ends are used separately as total leakage
The gas sample mouthful and gas setting-out mouthful of rate test, longitudinal tubule (L tubule) top are provided with controlled valve with respectively for sampling and setting-out
Journey is controlled to the gas turnover transverse tube in cavity, be provided with 0 type sealing ring to prevent gas on the inside of controlled valve and longitudinal tubule (L tubule)
Body is escaped during sample is picked and placeed from longitudinal tubule (L tubule) upper end.
Further, the fixed volume refers to the volume of 20ml or so, and its deviation is not more than ± 1ml, and after demarcation
Determine its accurate volume V.
Further, the controlled valve is the needle-valve with the cavity function that can seal fixed volume.
Wherein, the spicule of needle-valve extend into transverse tube lower section to carry out the control of gas turnover.
Wherein, the transverse tube of right-angled intersection, longitudinal tubule (L tubule) and cavity are welded by stainless steel material, and the requirement of its weld seam leak rate is little
In 1 × 10-8Pa.m3/ s, the sealing property index request between controlled valve and the cavity with fixed volume 2 is not more than 1 ×
10-7Pa.m3/ s, the integral leakage index request for picking and placeing sampling device is not more than 1 × 10-5Pa.m3/s。
Using it is above-mentioned pick and place that sampling device carries out satellite integral leakage test pick and place sample scaling method, comprise the following steps：
1) after probe gas is filled with satellite by check system, satellite is maintained at time t predetermined in closed container, uses instrument
The concentration increments A1 of probe gas in measurement closed container；
2) gas sample mouthful of sampler is connected with the source of the gas of probe gas, switch is opened in confining gas setting-out mouthful
Valve, the cavity to sampler orthobaric volume is vacuumized；
3) it is sampled, probe gas is filled with the cavity that the normal volume of sampler is V (ml), until pressure reaches
To 0.5MPa, closing switch valve, sampling process terminates；
4) disconnect the connection of gas sample mouthful and probe gas and close sample tap, gas setting-out mouthful is held with above-mentioned sealing
Device is connected, and opens controlled valve, carries out setting-out work；
5) setting-out terminates rear closing switch valve, using showing leakage in sealing container before and after identical measuring method surveying and locating
The further increment A2 of gas concentration, completes to demarcate；
6) the integral leakage Q of satellite is calculated using below equation, the test job of integral leakage, Q=(0.5 × V) × A1/ is completed
(A2×t)。
Wherein, the volume of fixed volume is 20ml ± 1ml.
Wherein, probe gas is helium, Krypton, carbon tetrafluoride or sulfur hexafluoride.
Wherein, scheduled time t is generally more than 24 hours.
The present invention proposes that a kind of satellite integral leakage, can be in satellite integral leakage with picking and placeing sampling device and picking and placeing sample scaling method
Test site quickly carries out the staking-out work of test system, can shorten scalar period, when effectively prevent environment and changing
The leak rate deviation of the referance leak for causing, improves the accuracy of test system demarcation, and that realizes various probe gas picks and places sample
Calibration process.
Brief description of the drawings
Fig. 1 is the satellite integral leakage test structural representation for picking and placeing sampling device of the invention.
Wherein, 1 is gas sample mouthful；2 is the cavity with fixed volume；3 is gas setting-out mouthful；4 is 0 type sealing ring；5
Controlled valve.
Specific embodiment
Introduced below is the specific embodiment as content of the present invention, below by specific embodiment to this
The content of invention is made further to illustrate.Certainly, description following detailed description is only example not Tongfang of the invention
The content in face, and should not be construed as limiting the scope of the invention.
Fig. 1 discloses the satellite integral leakage test structural representation for picking and placeing sampling device of the invention.This picks and places sampling device,
Including with the gas sample mouthful 1, cavity 2 of fixed volume, gas setting-out mouthful 3,0 type sealing ring 4 and controlled valve 5 etc. part.
Wherein the cavity 2 with fixed volume is the major part of sampler, and its volume is important parameter, the sealing of general satellite
Energy index request is the leakage rate about 10Pa.m for accumulating 24 hours3, i.e. 10MPa.ml.Due to the precision specific volume of pressure measxurement
Certainty of measurement is high, chooses the volume of 20ml, and now corresponding pressure is 0.5MPa, can take into account the sampling precision of pressure and volume
And complexity.Therefore the theoretical displacement for choosing 20ml is designed, manufacture deviation selection ± 1ml.Most professional metrological service at last
Demarcated to determine its actual volume V, the true volume of setting-out is sampled as probe gas.
The transverse tube of right-angled intersection, longitudinal tubule (L tubule) and cavity are welded by stainless steel material, its weld seam and material leak rate in itself
Index request is not more than 1 × 10-8Pa.m3/s。
Need to open controlled valve 5 during due to sampling, sampling terminates rear closing switch valve 5, remaining position is shown into leakage
Gas is emptied, and gas setting-out mouthful 3 is connected in the collection vessel that the test of satellite integral leakage is used, and is opened controlled valve 5 and is realized
The setting-out work of probe gas.In order to ensure the gas flow of sampling was not leaked before setting-out, realized by 0 type sealing ring 4
The sealing of controlled valve 5 and the cavity with fixed volume 2.Sealing between controlled valve and the cavity with fixed volume 2
Performance indications requirement is not more than 1 × 10-7Pa.m3/s。
Pick and place after the completion of sampling device development, it is necessary to test its overall sealing performance, specific method is, sealing gas
Setting-out mouthful 3, gas sample mouthful is connected to by helium gas source, is opened controlled valve and is filled with helium to picking and placeing sampling device, until pressure reaches
To 1MPa, using helium mass spectrum suction gun leak detecting respectively to carrying out leak rate test at above-mentioned material body, weld seam and 0 type sealing ring,
Leak rate index needs to meet These parameters requirement；Integral leakage test is carried out to the above-mentioned sampling device that picks and places by vacuum testing again,
Integral leakage index request is not more than 1 × 10-5Pa.m3/s。
Finally send the professional metrological service to carry out dischargeable capacity test in the device, provide the orthobaric volume V for picking and placeing sampling device.
Using it is above-mentioned pick and place that sampling device carries out satellite integral leakage test pick and place sample scaling method, comprise the following steps：
1) after probe gas is filled with satellite by check system, satellite is maintained at time t=24h predetermined in closed container,
The concentration increments A1 of probe gas in measurement closed container；
2) gas sample mouthful that will pick and place sampling device is connected with the source of the gas of probe gas, and confining gas setting-out mouthful, unlatching is opened
Closing valve, the cavity to sampler orthobaric volume is vacuumized；
3) it is sampled, probe gas is filled with the cavity that the normal volume of sampler is V (ml), until pressure reaches
To 0.5MPa, closing switch valve, sampling process terminates；
4) disconnect the connection of gas sample mouthful and probe gas and close sample tap, gas setting-out mouthful is held with above-mentioned sealing
Device is connected, and opens controlled valve, carries out setting-out work；
5) setting-out terminates rear closing switch valve, using showing leakage in sealing container before and after identical measuring method surveying and locating
The further increment A2 of gas concentration, completes to demarcate；
6) the integral leakage Q of satellite is calculated using below equation, the test job of integral leakage, Q=(0.5 × V) × A1/ is completed
(A2×t)。
In a specific embodiment, probe gas can select to be helium.Using helium when probe gas, can adopt
The probe gas concentration increments tested in sealing container with helium mass spectrometer leak detecting technology.
In other alternate embodiments, probe gas can be Krypton, carbon tetrafluoride or sulfur hexafluoride, and this is not affected
The implementation of the inventive method.It is helium, Krypton, carbon tetrafluoride or sulfur hexafluoride according to cost priority selecting sequence.
If the tested test system of satellite is two or more, can be using measurement be repeated several times, repetition is entered to system
The fixed method of rower.Can also no more than be gone up using being filled with different test systems with different probe gas simultaneously
State 4 kinds of probe gas.The increment of probe gas concentration in sealing container is carried out using four-electrode spectrum leak detector simultaneously, is used during demarcation
Carry out picking and placeing sample according to the method described above for different probe gas respectively, gas leakage is shown using four-electrode spectrum leak detector test difference
Body picks and places the increment for causing probe gas concentration in sealing container before and after sample, completes the demarcation work that various probe gas pick and place sample
Make, so as to complete the integral leakage test job of multiple different systems simultaneously.
When tested satellite integral leakage index is improved, sampling lofting amount reduces, and sampling work becomes difficult, and uncertainty increases
Plus.The sampling setting-out work of probe gas is now completed by the method using preparation standard probe gas concentration.When tested
When the integral leakage index of satellite improves an order of magnitude and reduces 10 times, the method using probe gas concentration is reduced is used
10% probe gas concentration gases carry out picking and placeing sample staking-out work；If the integral leakage index of tested satellite improves 2 orders of magnitude
When reducing 100 times, can carry out picking and placeing sample staking-out work using 1% probe gas concentration gases.It is more than 40L by volume
Bulk container in prepare needed for probe gas concentration gas, can accurately realize micro probe gas picks and places sample process,
The precision of sampling setting-out is not interfered with.
The integral leakage index of tested satellite improves 1 order of magnitude, can be taken using 10% probe gas concentration gases
Setting-out is demarcated, and 10% probe gas is first configured before sampling, the gas sample mouthful of sampling device will be picked and placeed during sampling and is configured
The source of the gas connection of probe gas, other job steps pick and place that sample demarcating steps are consistent with above-mentioned, are calculating the integral leakage Q public affairs of satellite
Formula increases the concentration of probe gas, system under test (SUT) integral leakage Q=(0.5 × V × 10%) × A1/ (A2 × t).
The integral leakage index of tested satellite improves 2 orders of magnitude, can be picked and placeed using 1% probe gas concentration gases
Sample is demarcated, and 1% probe gas is first configured before sampling, the gas sample mouthful of sampling device will be picked and placeed during sampling and is configured and show leakage
The source of the gas connection of gas, other job steps pick and place that sample demarcating steps are consistent with above-mentioned, are calculating the integral leakage Q formula increasing of satellite
Plus the concentration of probe gas, system under test (SUT) integral leakage Q=(0.5 × V × 1%) × A1/ (A2 × t).
Although detailed description being given to specific embodiment of the invention above and being illustrated, it should be noted that
We can carry out various equivalent changes and modification to above-mentioned implementation method according to conception of the invention, and the function produced by it is made
With still without departing from specification and accompanying drawing covered it is spiritual when, all should be within protection scope of the present invention.
Claims (6)
1. a kind of satellite integral leakage test is set with connection above sampling device, including the cavity with fixed volume, cavity is picked and placeed
There are the transverse tube and longitudinal tubule (L tubule) of cross, transverse tube is in cross connectivity structure with the inside of longitudinal tubule (L tubule), and transverse tube two ends are used separately as integral leakage
The gas sample mouthful and gas setting-out mouthful of test, longitudinal tubule (L tubule) top are provided with controlled valve with respectively for sampling and setting-out process
Gas turnover transverse tube in cavity is controlled, 0 type sealing ring is provided with to prevent gas on the inside of controlled valve and longitudinal tubule (L tubule)
Escaped from longitudinal tubule (L tubule) upper end during sample is picked and placeed, wherein, the fixed volume refers to the volume of 20ml or so, and its deviation is not more than
± 1ml, and its accurate volume V is determined after demarcation, the controlled valve is with the cavity function that can seal fixed volume
Needle-valve.
2. satellite integral leakage as claimed in claim 1 test is with picking and placeing sampling device, wherein, the spicule of needle-valve extend into transverse tube
Lower section carries out the control of gas turnover.
3. satellite integral leakage as claimed in claim 1 test is with picking and placeing sampling device, wherein, the transverse tube of right-angled intersection, longitudinal tubule (L tubule) and
Cavity is welded by stainless steel material, and the requirement of its weld seam leak rate is not more than 1 × 10-8Pa.m3/ s, controlled valve and with fixation
Sealing property index request between the cavity (2) of volume is not more than 1 × 10-7Pa.m3/ s, picks and places the integral leakage index of sampling device
It is required that being not more than 1 × 10-5Pa.m3/s。
4. using picking and placeing described in claim any one of 1-3, sampling device carries out satellite integral leakage test picks and places sample demarcation side
Method, comprises the following steps：
1) after probe gas is filled with satellite by check system, satellite is maintained at time t predetermined in closed container, uses apparatus measures
The concentration increments A1 of probe gas in closed container；
2) gas sample mouthful of the sampler is connected with the source of the gas of probe gas, switch is opened in confining gas setting-out mouthful
Valve, the cavity to sampler orthobaric volume is vacuumized；
3) it is sampled, probe gas is filled with the cavity that the normal volume of sampler is V, until pressure reaches
0.5MPa, closing switch valve, sampling process terminates；
4) disconnect the connection of gas sample mouthful and probe gas and close sample tap, gas setting-out mouthful is connected with above-mentioned sealing container
Connect, open controlled valve, carry out setting-out work；
5) setting-out terminates rear closing switch valve, using probe gas in sealing container before and after identical measuring method surveying and locating
The further increment A2 of concentration, completes to demarcate；
6) the integral leakage Q of satellite is calculated using below equation, the test job of integral leakage, Q=(0.5 × V) × A1/ (A2 is completed
×t)。
5. method as claimed in claim 4, wherein, probe gas is helium, Krypton, carbon tetrafluoride or sulfur hexafluoride.
6. method as claimed in claim 4, wherein, scheduled time t is generally more than 24 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410369471.XA CN104089745B (en) | 2014-07-30 | 2014-07-30 | The test of satellite integral leakage is with picking and placeing sampling device and pick and place sample scaling method |
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| CN201410369471.XA CN104089745B (en) | 2014-07-30 | 2014-07-30 | The test of satellite integral leakage is with picking and placeing sampling device and pick and place sample scaling method |
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| CN106840525A (en) * | 2017-03-29 | 2017-06-13 | 北京卫星环境工程研究所 | The standard leak rate contrast device of volatile liquid |
| CN109470417B (en) * | 2019-01-09 | 2020-07-07 | 青岛泰斯迈仪器设备有限公司 | Leak detection method for vacuum sampling normal pressure detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005083910A (en) * | 2003-09-09 | 2005-03-31 | Nec Engineering Ltd | Jig for checking leakage |
| US7464614B2 (en) * | 2005-05-18 | 2008-12-16 | Lawrence Livermore National Security, Llc | Offline solid phase microextraction sampling system |
| CN101738294A (en) * | 2008-11-17 | 2010-06-16 | 北京卫星环境工程研究所 | Atmosphere accumulation leak detection system and leak detection method thereof |
| CN102052940B (en) * | 2010-10-26 | 2012-01-04 | 中国航天科技集团公司第五研究院第五一○研究所 | Device for measuring extremely-low gas flow based on static expansion vacuum standard |
| CN102589820B (en) * | 2012-02-06 | 2014-10-15 | 江苏东方航天校准检测有限公司 | System and method for calibrating lower limit of positive-pressure leak by extending constant volume method |
| CN102721515B (en) * | 2012-06-27 | 2015-04-08 | 上海裕达实业公司 | Device and method for detecting whole satellite leak rate of satellite |
| CN102818679B (en) * | 2012-07-23 | 2014-12-31 | 北京卫星环境工程研究所 | Sampling device used in satellite total leak rate testing leak detector |
| CN103645013B (en) * | 2013-11-12 | 2016-04-06 | 北京卫星环境工程研究所 | Satellite integral leakage test automatic clamping and placing sample system and pick and place quadrat method |
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