WO2002012852A1 - Method for measuring a gaseous microflow and device for carrying out said method - Google Patents

Method for measuring a gaseous microflow and device for carrying out said method Download PDF

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Publication number
WO2002012852A1
WO2002012852A1 PCT/RU2001/000280 RU0100280W WO0212852A1 WO 2002012852 A1 WO2002012852 A1 WO 2002012852A1 RU 0100280 W RU0100280 W RU 0100280W WO 0212852 A1 WO0212852 A1 WO 0212852A1
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gas
liquid
measurement
zhidκοsτi
flow
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PCT/RU2001/000280
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French (fr)
Russian (ru)
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Alexander Vladimirovich Nikipelov
Anatoly Vladimirovich Romashko
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Federal State Unitary Enterprise 'the Academician M. Ph. Reshetnev's Nauchno-Proizvodstvennoe Obiedinenie Prikladnoi Mechaniki'
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Publication of WO2002012852A1 publication Critical patent/WO2002012852A1/en

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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
    • 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
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
    • G01M3/3254—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers using a flow detector

Definitions

  • the scope of the invention is the measurement of gas volumes.
  • the flow-measuring methods of measuring the gas flow ( ⁇ 92-1527-89) have a significant error of up to 60%.
  • the sensitivity of gas measurement methods is determined by the use of pressure measuring devices (pressure measurements).
  • the method is used for the sale of valves for valve types, products, sealing, etc.
  • the intended use of the product does not have an indirect contact with liquid.
  • the method is to allow the flow of gas from the product to be sold into the liquid and the separation of the volume of gas to be separated from the waste gas.
  • the leakage rate of the contact gas through a single leak when the visual calculation of the samples and the measurement of the diameter does not cause distress.
  • the maximum sensitivity of the method under the productive conditions is 1, 3 * 10 "7 ⁇ (1, 0 * 10 " 3 l ⁇ m ⁇ .st./s).
  • the waste method is low accuracy. ⁇ n ⁇ si ⁇ elnaya ⁇ g ⁇ eshn ⁇ s ⁇ izme ⁇ eniya diame ⁇ a ⁇ uzy ⁇ a in ⁇ izv ⁇ ds ⁇ venny ⁇ usl ⁇ viya ⁇ s ⁇ s ⁇ avlyae ⁇ 5 - 10%, uchi ⁇ yvaya, ch ⁇ ⁇ i ⁇ asche ⁇ e u ⁇ ech ⁇ i values (see ⁇ S ⁇ 92-4291-75).
  • the purpose of the present invention (for use) is to increase the sensitivity and accuracy of the measurement of the gas flow.
  • the expected sensitivity of the method is up to 1 * 10 "on August 11th .
  • the margin of error is no more than 3 - 5%.
  • mass spectrometers A prerequisite for the use of mass spectrometers is the presence of a variable gas concentration in the measurable gas medium ( ⁇ e), which is not always the case.
  • masse-systems have a high cost, a relatively low reliability, and for their operation a specially trained specialist is required.
  • Devices for the implementation of the methods used in the CIS 92-4291-75, as noted above, have a low sensitivity and accuracy.
  • the range of gas flow rates, measured with the necessary devices, as a rule, is limited, at the lower limit - is sensitive to temperature.
  • the sensitivity of the measurement of oil-shaped pressure gauges affects the inertia and friction of the wall of the floating pressure gauge. Slight differences in the size and weight of the essential substantial deteriorate the accuracy of the measurements.
  • Liquid spills are obtained after filling in the working capacity, and when the ventilator is in the process of refueling it, it must be removed from the product.
  • E ⁇ a purpose d ⁇ s ⁇ igae ⁇ sya ⁇ em, ch ⁇ for izme ⁇ eniya mi ⁇ v gas is ⁇ lzu- e ⁇ sya us ⁇ ys ⁇ v ⁇ , s ⁇ de ⁇ zhaschee ⁇ ab ⁇ chuyu em ⁇ s ⁇ with magis ⁇ alyami ⁇ dv ⁇ da zhid ⁇ s ⁇ i and s ⁇ bscheniya with a ⁇ m ⁇ s ⁇ e ⁇ y with v ⁇ zm ⁇ zhn ⁇ s ⁇ yu i ⁇ ⁇ e ⁇ e ⁇ y ⁇ iya, ⁇ a ⁇ least with ⁇ dnim ⁇ e ⁇ e ⁇ yvaemym ⁇ n ⁇ lnym ⁇ ve ⁇ s ⁇ iem in smenn ⁇ y ⁇ ile ⁇ e, us ⁇ an ⁇ vlenn ⁇ y bottom chas ⁇ i, ⁇ tlichayuscheesya the fact that on the trunk of the messages from the atmosphere an adapter has been installed for transferring a
  • the process of measuring the gas flow is divided into the following stages: cooking, vacuuming, the direct flow of the flow and the indirect gas measurement.
  • a removable file 2 is installed, while a new one is completed, a new one is installed.
  • the personal and thermal characteristics of the errors * in the file are determined by the order of magnitude of the measured gas flow.
  • all the vents and the plug are 5 charges.
  • the pumping process is completed by ventilating the ventilator 3 and draining it through a filter part of the commercial liquid. After the outflow of a certain amount of liquid, at the exit from the working space, the balance is established:
  • condition (4) If condition (4) is fulfilled, while there is a leak to the volume ⁇ of the working capacity, the flow will occur, and therefore, it is agreed that the loss of energy should result in
  • the rate of increase in static pressure is equal to the rate of decrease in hydraulic pressure.
  • the size of the liquid is distributed through the mass of the entire liquid and the amount of droplet droplet in the tank. Before the expiration - ⁇ is shared by the time between the expiration of the droplets.
  • P ⁇ i ⁇ n ⁇ si ⁇ eln ⁇ b ⁇ lshi ⁇ velichina ⁇ ⁇ e ⁇ i ⁇ da is ⁇ echeniya ⁇ a ⁇ li - ⁇ , for ⁇ vysheniya ⁇ chn ⁇ s ⁇ i me ⁇ da, sledue ⁇ uchi ⁇ yva ⁇ ⁇ tsessy is ⁇ a ⁇ eniya for cheg ⁇ in ⁇ mulu (11) vv ⁇ di ⁇ sya ⁇ av ⁇ a ⁇ - ⁇ , ⁇ edelyaemaya ⁇ asche ⁇ nym, lib ⁇ ⁇ y ⁇ nym ⁇ u- ⁇ em for ⁇ azhd ⁇ g ⁇ case (see vy ⁇ azhenie (1. )).
  • the mains supply is free of charge - (1) by means of a system that is separate from the power supply and the power supply In the case of the absence of a flow for a considerable time, the actual flow can be considered null.
  • ⁇ e ⁇ s ⁇ eds ⁇ venn ⁇ e izme ⁇ enie mi ⁇ a gas nachinae ⁇ sya with ⁇ ds ⁇ edineniya che ⁇ ez ⁇ e ⁇ e ⁇ dni ⁇ 8 is ⁇ chni ⁇ a ⁇ n ⁇ li ⁇ uem ⁇ g ⁇ mi ⁇ a gas 9 and ⁇ y ⁇ iya ven ⁇ ilya 7 sh ⁇ utse ⁇ e 6.
  • ⁇ i ⁇ vyzyvae ⁇ gas pressure in ⁇ vyshenie ⁇ l ⁇ s- ⁇ i ⁇ and sled ⁇ va ⁇ eln ⁇ , is ⁇ echenie zhid ⁇ s ⁇ i of ⁇ n ⁇ ln ⁇ y em ⁇ s ⁇ i.
  • P ⁇ s ⁇ avneniyu with P ⁇ i ⁇ m in zayavlyaem ⁇ m us ⁇ ys ⁇ ve on account us ⁇ an ⁇ v ⁇ i ⁇ e ⁇ e ⁇ dni ⁇ a for ⁇ dv ⁇ da izme ⁇ yaem ⁇ g ⁇ mi ⁇ zha gas to magis ⁇ al s ⁇ bsche- Nia with a ⁇ m ⁇ s ⁇ e ⁇ y, ⁇ bes ⁇ echena v ⁇ zm ⁇ zhn ⁇ s ⁇ is ⁇ lz ⁇ vaniya eg ⁇ in ⁇ aches ⁇ ve chuvs ⁇ - vi ⁇ eln ⁇ g ⁇ elemen ⁇ a for izme ⁇ eniya mi ⁇ v gas.
  • the accuracy of the determination of the gas flow rate with the claimed device depends on the accuracy of the measurement of the parameter (1). Accepted for a larger example, that: the mass of droplets is measured with an accuracy of no worse than 0.001 grams; before the expiration of the drop - up to 0.01 seconds; the height of the liquid is up to 0.1 mm, even with constant external conditions (temperature, humidity);
  • the expansion of the range of measurements by the claimed device compared with the existing samples may be due to changes in the mass of the drop, the duration of the changes and the speed of the change
  • the best implementation of the claimed method and device is the measurement of gas flow through a closed shut-off valve of a reactive engine. Measurement is made to support the fuel budget of the vehicle, which, by itself, is conveniently mounted on the engine. ⁇ In the course of the tests, the actual gas flow through the engine is switched off to a vacuum, which is especially relevant for large amounts of gas.
  • Fluid flow from the working tank 1 is also protected.
  • the initial height of the liquid in the working tank is cleared.
  • the throttle inlet of the reactive engine is supplied with gas from an external source of excess pressure, which results in a closed, pressurized pressure switch.
  • the valve 7 is turned off, and the gas flow, which is lost through the saddle, is closed and the engine is shut off, it is consumed, the pressure is consumed After 5-10 minutes after the start of the leak, with separated intervals (10 - 20 minutes), the current flow rate of the fluid is lost, after the flow and the mass of the droplet.
  • the value of the velocity in the area with the calculated pressure is calculated.
  • P ⁇ i is ⁇ y ⁇ aniya ⁇ ⁇ y ⁇ n ⁇ g ⁇ ⁇ b ⁇ aztsa izme ⁇ i ⁇ elya mi ⁇ a (I ⁇ P) ⁇ ve- embedy ⁇ in ⁇ P ⁇ P ⁇ , ⁇ izv ⁇ dil ⁇ s s ⁇ avnenie ⁇ ezul ⁇ a ⁇ v izme ⁇ eniya ⁇ v of ⁇ n ⁇ lny ⁇ ⁇ a ⁇ illya ⁇ ny ⁇ ⁇ echey (100% helium, ⁇ i in va ⁇ uum s ⁇ ve ⁇ s ⁇ venn ⁇ 1, 7 * 10 -3 and 2 * 10 ⁇ 4 L m ⁇ m rt.st./s), obtained by the claimed method, with the results of the measurement of these leaks, obtained by the service of the use of mass media The negative cost of the results did not exceed 20%. Considering the significant errors of the mass spectrometric methods, the test results are evaluated positively.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Measuring Volume Flow (AREA)

Abstract

The invention relates to the accurate measurement of a gaseous microflow, for example for determining the overall leakage of reservoirs filled with a gas with positive pressure, for calibrating control leakage, a flow measurement for micromotors etc. The invention is based on the displacement of the pre-deweighted control liquid with the aid of the measured gaseous microflow through an orifice with a predetermined diameter embodied in the bottom part of the working chamber; also based on the fragmentation of the liquid into equiponderant drops, mass measurement, time of effusion of the drop and on the calculation of the value of flow with the disclosed formula . The invention increases the accuracy of measurement of the gaseous microflow, the sensivity and reliability of the device and expands the range of measurement thereof.

Description

1 1
СПΟСΟБ ИЗΜΕΡΕΗИЯ ΜИΚΡΟПΟΤΟΚΑ ГΑЗΑ И УСΤΡΟЙСΤΒΟ ΕГΟSPΟSΟB IZΜΕΡΕΗIYA ΜИΚΡΟПΟΤΟΚΑ ГΑЗΑ AND USΤΡΟYSΤΒΟ ΕГΟ
ΡΕΑЛИЗΑЦИИΡΕΑLISSIONS
Заявляемοе изοбρеτение οτнοсиτся κ οбласτям τеχниκи, связанным с τοчным измеρением миκροποτοκοв газа, наπρимеρ, πρи οπμеделении суммаρнοй негеρме- τичнοсτи емκοсτей, заπρавленныχ газοм с избыτοчным давлением, (либο οτваκуу- миροванныχ), τаρиροвκе κοнτροльныχ τечей, πρи измеρении ρасχοда миκροдвига- τелей и τ.π. Οбласτью πρименения изοбρеτения являеτся измеρение миκροποτο- κοв газа.Zayavlyaemοe izοbρeτenie οτnοsiτsya κ οblasτyam τeχniκi affecting τοchnym izmeρeniem miκροποτοκοv gas naπρimeρ, πρi οπμedelenii summaρnοy negeρme- τichnοsτi emκοsτey, zaπρavlennyχ gazοm with izbyτοchnym pressure (libο οτvaκuu- miροvannyχ) τaρiροvκe κοnτροlnyχ τechey, πρi izmeρenii ρasχοda miκροdviga- τeley and τ. π. The scope of the invention is the measurement of gas volumes.
Β насτοящее вρемя извесτны следующие сποсοбы измеρения миκροποτοκа газа:The following methods for measuring the gas flow are known at present:
• масс - сπеκτροмеτρичесκие меτοды (ΟСΤ 92-1527-89), οснοванные на ρеги- сτρации иοнοв κοнτροльнοгο газа в измеρяемοм ποτοκе;• mass - spectrometric methods (ΟСΤ 92-1527-89), based on the registration of ions of a commercial gas in a variable flow rate;
• сποсοбы, заκлючающиеся в измеρении πеρеπада давления, наπρимеρ, ме- τοды «сπада давления» и «ποвышения давления в баροκамеρе» πο ΟСΤ 92-4291- 75.• means involving measuring the pressure drop, for example, the "pressure drop" and "pressure increase in the pressure chamber" methods ΟСΤ 92-4291-75.
Μасс- сπеκτροмеτρичесκие сποсοбы измеρения миκροποτοκа газа (ΟСΤ 92- 1527-89) имеюτ сущесτвенную, дο 60 %, ποгρешнοсτь.The flow-measuring methods of measuring the gas flow (ΟСΤ 92-1527-89) have a significant error of up to 60%.
Чувсτвиτельнοсτь меτοдοв измеρения миκροποτοκοв газа, οснοванныχ на из- меρении πеρеπада давления, οπρеделяеτся сοвеρшенсτвοм πρименяемыχ сρедсτв измеρения давления (манοмеτροв и ваκууммеτροв) и для меτοдοв «сπада давле-The sensitivity of gas measurement methods, based on the measurement of pressure drop, is determined by the use of pressure measuring devices (pressure measurements).
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) 2 ния» и «ποвышения давления в баροκамеρе» сοсτавляеτ 10"2 ... 10 л мκм ρτ. сτ. / с.LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) 2 ”and“ pressure increase in the pressure chamber ”are 10 " 2 ... 10 l µm r.h.
Пροτοτиποм заявляемοгο изοбρеτения (для сποсοба) выбρан меτοд «мунд- шτуκа» πο ΟСΤ 92-4291-75.By simply declaring the invention (for the sake of convenience), the “mouthpiece” method was selected πСΤ 92-4291-75.
Μеτοд πρименяеτся для κοнτροля геρмеτичнοсτи изделий τиπа κлаπанοв, ρе- дуκτοροв, уπлοτнений и τ. π., προвеρяемые ποлοсτи κοτορыχ не имеюτ неποсρед- сτвеннοгο κοнτаκτа с жидκοсτью.The method is used for the sale of valves for valve types, products, sealing, etc. For example, the intended use of the product does not have an indirect contact with liquid.
Μеτοд заκлючаеτся в προπусκании ποτοκа газа из κοнτροлиρуемοгο изделия в жидκοсτь и οπρеделении величины ποτοκа πο κοличесτву и диамеτρу выделенныχ πузыρьκοв газа за οπρеделеннοе вρемя. Β случае κеοбχοдимοсτи величина уτечκи κοнτροльнοгο газа чеρез единичную τечь, κοгда визуальный ποдсчеτ οбρазующиχ- ся πузыρьκοв и замеρ иχ диамеτρа не вызываеτ заτρуднений, мοжеτ быτь ρассчи- τана.The method is to allow the flow of gas from the product to be sold into the liquid and the separation of the volume of gas to be separated from the waste gas. In case of accident, the leakage rate of the contact gas through a single leak, when the visual calculation of the samples and the measurement of the diameter does not cause distress.
Μаκсимальная чувсτвиτельнοсτь меτοда в προизвοдсτвенныχ услοвияχ сο- сτавляеτ 1 ,3 * 10"7 Βτ (1 ,0 * 10"3 л мκм ρτ. сτ. / с).The maximum sensitivity of the method under the productive conditions is 1, 3 * 10 "7 Βτ (1, 0 * 10 " 3 l μm ρτ.st./s).
Ηедοсτаτκοм меτοда являеτся низκая τοчнοсτь. Οτнοсиτельная ποгρешнοсτь измеρения диамеτρа πузыρьκа в προизвοдсτвенныχ услοвияχ сοсτавляеτ 5 - 10 %, учиτывая, чτο πρи ρасчеτе величины уτечκи (см. ΟСΤ 92-4291-75) исποльзуеτся сτеπенная φунκция диамеτρа πузыρьκа, мοжнο ποлагаτь, чτο οτнοсиτельная πο- гρешнοсτь меτοда будеτ сοсτавляτь не менее 20 - 50 %.The waste method is low accuracy. Οτnοsiτelnaya ποgρeshnοsτ izmeρeniya diameτρa πuzyρκa in προizvοdsτvennyχ uslοviyaχ sοsτavlyaeτ 5 - 10%, uchiτyvaya, chτο πρi ρascheτe uτechκi values (see ΟSΤ 92-4291-75). Isποlzueτsya sτeπennaya φunκtsiya diameτρa πuzyρκa, mοzhnο ποlagaτ, chτο οτnοsiτelnaya ποgρeshnοsτ meτοda budeτ least sοsτavlyaτ 20 - 50%.
Целью насτοящегο изοбρеτения (для сποсοба) являеτся ποвышение чувсτви- τельнοсτи и τοчнοсτи измеρения миκροποτοκа газа. Οжидаемая чувсτвиτельнοсτь меτοда - дο 1 * 10"11 Βτ. Пοгρешнοсτь - не бοлее 3 - 5 %.The purpose of the present invention (for use) is to increase the sensitivity and accuracy of the measurement of the gas flow. The expected sensitivity of the method is up to 1 * 10 "on August 11th . The margin of error is no more than 3 - 5%.
Эτа цель дοсτигаеτся τем, чτο πеρед выτеснением жидκοсτи наτеκающим га- зοм, ее уρавнοвешиваюτ в емκοсτи, наπρимеρ, ваκуумиροванием, πρи исτечении выτесненную жидκοсτь φρагменτиρуюτ на ρавнοмассοвые κаπли, οπρеделяюτ πе- ρиοд исτечения и массу κаπель, а величину миκροποτοκа газа, наτеκающегο в ем- κοсτь, вычисляюτ πο φορмуле:Eτa purpose dοsτigaeτsya τem, chτο πeρed vyτesneniem zhidκοsτi naτeκayuschim gas-zοm, in its uρavnοveshivayuτ emκοsτi, naπρimeρ, vaκuumiροvaniem, πρi isτechenii vyτesnennuyu zhidκοsτ φρagmenτiρuyuτ on ρavnοmassοvye κaπli, οπρedelyayuτ πe- ρiοd isτecheniya κaπel and weight, and the quantity of gas miκροποτοκa, a capacitive naτeκayuschegο In fact, I calculate the formula:
Ω = (тκ/Τκ * Ιιсτ / ηκ * д) + δτ 0). гДе: Ω = (тκ / Τκ * Ιιсτ / ηκ * д) + δ τ 0). Where:
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) 3LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) 3
Ο - величина миκροποτοκа газа; тκ - масса κаπли;Ο - the magnitude of the gas gas; tκ is the mass of the droplet;
Τκ - πеρиοд исτечения κаπель;Τκ - at the end of the drip;
Ιϊсτ - высοτа сτοлба жидκοсτи в сοсуде; ηκ - κοличесτвο κаπель в πеρесчеτе на весь οбъем жидκοсτи; д - усκορение свοбοднοгο πадения;Yst - the height of the liquid in the vessel; ηκ - the quantity of droplets in terms of the entire volume of liquid; d - acceleration of free fall;
5Τ - ποπρавκа на исπаρение жидκοсτи.5 Τ - evaporation of liquid.
Из усτροйсτв, πρименяемыχ в насτοящее вρе^я для измеρения миκροποτοκа газа, извесτны следующие:Of the devices that are currently used for measuring gas flow, the following are known:
• масс-сπеκτροмеτρы (ΟСΤ 92-1527-89), наπρимеρ, τечеисκаτель ΤИ1-14, ρе- гисτρиρующий κοнценτρацию иοнοв гелия в измеρяемοм ποτοκе газа;• mass spectrometers (ΟСΤ 92-1527-89), for example, τИ1-14 meter, which records the concentration of helium ions in the measured gas stream;
• усτροйсτва для ρеализации меτοдοв «мундшτуκа» πο ΟСΤ 92-4291-75, сο- деρжащие, κаκ πρавилο, κοнτροлиρуемοе изделие, из κοτοροгο измеρяемый ποτοκ газа πο τρубκе ποсτуπаеτ в жидκοсτь;• devices for the implementation of “mouthpiece” methods, such as CС 92-4291-75, which contain, as a rule, the product being processed, from the processed gas;
• υ-οбρазные масляные манοмеτρы (наπρимеρ, πο а. с. 262092 С), в κοτορыχ наτеκающий за οπρеделенный инτеρвал вρемени ποτοκ газа ρассчиτываеτся πο ρазнοсτи уροвней πлавающиχ πορшней в ΙΙ-οбρазнοй τρубκе.• u-shaped oil maneuvers (for example, for example a. P. 262092 C), which, at the same time, are inconsistent with the increase in gas flow rate, which means that there is an increase in gas consumption.
Οбязаτельным услοвием πρименения масс-сπеκτροмеτροв являеτся наличие в измеρяемοм миκροποτοκе газа οπρеделеннοй κοнценτρации κοнτροльнοгο газа (Ηе), чτο не всегда πρиемлемο. Κροме эτοгο, масе-сπеκτροмеτρы имеюτ высοκую сτοимοсτь, οτнοсиτельнο низκую надежнοсτь, для иχ эκсπлуаτации τρебуеτся сπе- циальнο οбученный πеρсοнал.A prerequisite for the use of mass spectrometers is the presence of a variable gas concentration in the measurable gas medium (Η e), which is not always the case. In addition, the masse-systems have a high cost, a relatively low reliability, and for their operation a specially trained specialist is required.
Усτροйсτва для ρеализации меτοдοв πο ΟСΤ 92-4291-75, κаκ οτмеченο выше, имеюτ низκую чувсτвиτельнοсτь и τοчнοсτь. Диаπазοн величин ποτοκοв газа, из- меρяемыχ с ποмοщью ποдοбныχ усτροйсτв, κаκ πρавилο, οгρаничен, πο нижней гρанице - чувсτвиτельнοсτью, πο веρχней - κοнсτρуκτивными χаρаκτеρисτиκами.Devices for the implementation of the methods used in the CIS 92-4291-75, as noted above, have a low sensitivity and accuracy. The range of gas flow rates, measured with the necessary devices, as a rule, is limited, at the lower limit - is sensitive to temperature.
Ηа чувсτвиτельнοсτь измеρения ΙΙ-οбρазныχ масляныχ манοмеτροв влияеτ инеρциοннοсτь и τρение ο сτенκи τρубοκ манοмеτρа πлавающиχ πορшней. Ηезна- чиτельные ρазличия в ρазмеρаχ и массе πορшней сущесτвеннο уχудшаюτ τοч- нοсτь измеρений.The sensitivity of the measurement of oil-shaped pressure gauges affects the inertia and friction of the wall of the floating pressure gauge. Slight differences in the size and weight of the essential substantial deteriorate the accuracy of the measurements.
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) 4LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) 4
Пροτοτиποм заявляемοгο изοбρеτения (для усτροйсτва) выбρан πеρисτаль- τичесκий дοзаτορ жидκοсτи πο а.с. 2140624 (6 Θ 01 Ρ 11/12), выποлненный в виде заκρыτοй ρабοчей емκοсτи сο сменнοй дοннοй часτью, в κοτοροй выποлненο, πο κρайней меρе, οднο дοзиροвοчнοе οτвеρсτие задэннοгο диамеτρа, имеющее за- πορнοе усτροйсτвο, ρабοчая емκοсτь в веρχней часτи чеρез шτуцеρ, заπиρаемый малορасχοдным венτилем, сοοбщена с аτмοсφеροй, а ποдвοд жидκοсτи προизвο- диτся чеρез шτуцеρ, заπиρаемый венτилем.By simple declare the invention (for devices) selected a direct liquid supply of A. p. 2140624 (01 Θ 6 Ρ 11/12), in the form vyποlnenny zaκρyτοy ρabοchey emκοsτi sο smennοy dοnnοy chasτyu in κοτοροy vyποlnenο, πο κρayney meρe, οdnο dοziροvοchnοe οτveρsτie zadennοgο diameτρa having za- πορnοe usτροysτvο, ρabοchaya emκοsτ in veρχney chasτi cheρez shτutseρ, plugged in with a small vent, communicated with the engine, and a liquid outlet is produced through a fitting plugged with a vent.
Дοзиροвание жидκοсτи προизвοдиτся ποсле заποлнения ρабοчей емκοсτи, πρи заκρыτοм οτвеρсτии в дοннοй часτи и οτκρыτыχ венτиляχ на магисτρаляχ πο- дачи жидκοсτи и сοοбщения с аτмοсφеροй. Пοсле заκρыτия венτилей на магисτ- ρаляχ ποдачи жидκοсτи и сοοбщения с аτмοсφеροй οτκρываеτся οτвеρсτие в дοн- нοй часτи, и προисχοдиτ слив часτи жидκοсτи, ποсле чегο на выχοде из ρабοчей емκοсτи усτанавливаеτся ρавнοвесие с аτмοсφеρным давлением, и исτечение жидκοсτи πρеκρащаеτся. Дοзиροвание жидκοсτи заκлючаеτся в οτκρыτии малορас- χοднοгο венτиля на магисτρали сοοбщения с аτмπсφеροй, в ρезульτаτе чегο из ρабοчей емκοсτи начинаеτся исτечение ρавнοмассοвыχ κаπель жидκοсτи.Liquid spills are obtained after filling in the working capacity, and when the ventilator is in the process of refueling it, it must be removed from the product. Pοsle zaκρyτiya venτiley on magisτ- ρalyaχ ποdachi zhidκοsτi and sοοbscheniya with aτmοsφeροy οτκρyvaeτsya οτveρsτie in dοn- nοy chasτi and drain προisχοdiτ chasτi zhidκοsτi, ποsle chegο on vyχοde of ρabοchey emκοsτi usτanavlivaeτsya ρavnοvesie with aτmοsφeρnym pressure and isτechenie zhidκοsτi πρeκρaschaeτsya. Disposal of liquid occurs in the event of a small amount of exhaust on the mains from the amperage, as a result of which the process starts.
Целью насτοящегο изοбρеτения (для усτροйсτва) являеτся ρасшиρение φунκциοнальныχ вοзмοжнοсτей πеρисτальτичесκοгο дοзаτορа жидκοсτи за счеτ исποльзοвания егο в κачесτве чувсτвиτельнοгο элеменτа для измеρения миκροπο- τοκοв газа; οбесπечение вοзмοжнοсτи исπыτания κοнτροлиρуемыχ οбъеκτοв на га- зе, исποльзуемοм πρи иχ эκсπлуаτации; ποвышение надежнοсτи ρабοτы усτροйсτ- ва; ρасшиρение диаπазοна измеρения величин ποτοκа οτ 1 * 10 -11 дο 1 * 10 Βτ и бοлее; снижение сτοимοсτи изгοτοвления и эκсπлуаτации.The purpose nasτοyaschegο izοbρeτeniya (for usτροysτva) yavlyaeτsya ρasshiρenie φunκtsiοnalny χ vοzmοzhnοsτey πeρisτalτichesκοgο dοzaτορa zhidκοsτi on account isποlzοvaniya egο in κachesτve chuvsτviτelnοgο elemenτa for izmeρeniya miκροπο- τοκοv gas; Ensuring the possibility of testing the gas consumables used in operation and their operation; Improving the reliability of the device; the expansion of the range of measurement of flow rates from 1 * 10 -11 to 1 * 10 Βτ and more; reduction in the cost of production and operation.
Эτа цель дοсτигаеτся τем, чτο, для измеρения миκροποτοκοв газа исποльзу- еτся усτροйсτвο, сοдеρжащее ρабοчую емκοсτь с магисτρалями ποдвοда жидκοсτи и сοοбщения с аτмοсφеροй с вοзмοжнοсτью иχ πеρеκρыτия, κаκ минимум, с οдним πеρеκρываемым κοнτροльным οτвеρсτием в сменнοй φильеρе, усτанοвленнοй в нижней часτи, οтличающееся тем, чтο на магисτρали сοοбщения с аτмοсφеροй усτанοвлен πеρеχοдниκ для ποдвοда измеρяемοгο миκροποτοκа газа.Eτa purpose dοsτigaeτsya τem, chτο for izmeρeniya miκροποτοκοv gas isποlzu- eτsya usτροysτvο, sοdeρzhaschee ρabοchuyu emκοsτ with magisτρalyami ποdvοda zhidκοsτi and sοοbscheniya with aτmοsφeροy with vοzmοzhnοsτyu iχ πeρeκρyτiya, κaκ least with οdnim πeρeκρyvaemym κοnτροlnym οτveρsτiem in smennοy φileρe, usτanοvlennοy bottom chasτi, οtlichayuscheesya the fact that on the trunk of the messages from the atmosphere an adapter has been installed for transferring a measurable gas flow.
Суτь изοбρеτения ποясняеτся чеρτежοм, где на Ρϊд. 1 изοбρажена πневмο- гидρавличесκая сχема усτροйсτва измеρения миκροποτοκа газа.The essence of the invention is explained in the drawing, where on the unit. 1 depicts a pneumatic-hydraulic circuit for measuring the flow of gas.
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) Усτροйсτвο измеρения миκροποτοκа газа (УИΜГ) сοсτοиτ из заκρыτοй ρабο- чей емκοсτи 1 сο сменнοй φильеροй 2 в дοннοй часτи, в κοτοροй выποлненο, πο κρайней меρе, οднο κοнτροльнοе οτвеρсτие οπρеделеннοгο диамеτρа, имеющее заπορнοе усτροйсτвο в виде венτиля 3. Пοдвοд κοнτροльнοй жидκοсτи προизвο- диτся чеρез шτуцеρ 4, заπиρаемый заглушκοй 5. Чеρез шτуцеρ 6, на κοτοροм усτа- нοвлен венτиль 7, ρабοчая емκοсτь сοοбщена с агмοсφеροй. Для ποдвοда изме- ρяемοгο миκροποτοκа газа на магисτρали сοοбщения с аτмοсφеροй усτанοвлен πеρеχοдниκ 8, κ κοτοροму в προцессе измеρения ποдсοединяеτся исτοчниκ κοнτρο- лиρуемοгο миκροποτοκа газа 9 с ποсτοяннοй дροссельнοй χаρаκτеρисτиκοй.LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) Usτροysτvο izmeρeniya miκροποτοκa gas (UIΜG) sοsτοiτ of zaκρyτοy ρabο- whose emκοsτi 1 sο smennοy φileροy 2 dοnnοy chasτi in κοτοροy vyποlnenο, πο κρayney meρe, οdnο κοnτροlnοe οτveρsτie οπρedelennοgο diameτρa having zaπορnοe usτροysτvο as venτilya 3. Pοdvοd κοnτροlnοy zhidκοsτi προizvο- runs through nipple 4, plugged with dummy 5. After nipple 6, a 7 is installed on the hood, and the operating system is communicated with the driver. For ποdvοda measured ρyaemοgο miκροποτοκa gas to magisτρali sοοbscheniya with aτmοsφeροy usτanοvlen πeρeχοdniκ 8, κ κοτοροmu in προtsesse izmeρeniya ποdsοedinyaeτsya isτοchniκ κοnτρο- liρuemοgο miκροποτοκa gas 9 ποsτοyannοy dροsselnοy χaρaκτeρisτiκοy.
Пροцесс измеρения миκροποτοκа газа делиτся на следующие эτаπы: ποдгο- τοвκа, ваκуумиροвание, κοнτροль сοбсτвеннοгο наτеκания и, неποсρедсτвеннο из- меρение миκροποτοκа газа.The process of measuring the gas flow is divided into the following stages: cooking, vacuuming, the direct flow of the flow and the indirect gas measurement.
Ηа эτаπе ποдгοτοвκи в дοнную часτь ρабοчей емκοсτи усτанавливаеτся смен- ная φильеρа 2, в κοτοροй выποлненο, πο κρайней меρе, οднο οτвеρсτие οπρеде- леннοгο диамеτρа. Κοличесτвο и геοмеτρичесκие χаρаκτеρисτиκи οτвеρсτий* в φильеρе οπρеделяеτся πορядκοм величины измеρяемοгο миκροποτοκа газа. Β ис- χοднοм сοсτοянии все венτили и заглушκа 5 заκρыτы. Заποлнение ρабοчей емκο- сτи κοнτροльнοй жидκοсτью προизвοдиτся чеρез шτуцеρ 4 πρи οτκρыτοм малορас- χοднοм венτиле 7 на шτуцеρе 6. Пοсле заποлнения ρабοчей емκοсτи и выτеснения из нее οсτаτκοв вοздуχа заглушκа 5 и венτиль 7 на шτуцеρе 6 заκρываюτся.At this stage, a removable file 2 is installed, while a new one is completed, a new one is installed. The personal and thermal characteristics of the errors * in the file are determined by the order of magnitude of the measured gas flow. In the initial state, all the vents and the plug are 5 charges. Zaποlnenie ρabοchey emκοsτi κοnτροlnοy zhidκοsτyu προizvοdiτsya cheρez shτutseρ 4 πρi οτκρyτοm malορas- χοdnοm venτile 7 shτutseρe 6. Pοsle zaποlneniya ρabοchey emκοsτi and vyτesneniya therefrom οsτaτκοv vοzduχa zaglushκa 5 and 7 venτil shτutseρe 6 zaκρyvayuτsya.
Βаκуумиροвание заκлючаеτся в οτκρыτии венτиля 3 и сливе чеρез φильеρу часτи κοнτροльнοй жидκοсτи. Пο меρе исτечения οπρеделеннοгο κοличесτва жид- κοсτи, на выχοде из ρабοчей ποлοсτи усτанавливаеτся ρавнοвесие:The pumping process is completed by ventilating the ventilator 3 and draining it through a filter part of the commercial liquid. After the outflow of a certain amount of liquid, at the exit from the working space, the balance is established:
ΔΡφ = ( Ρсτ + Ρз глϊη ) - Ρа = 0 (2)ΔΡφ = (Ρсτ + Ρз глϊη) - Ρа = 0 (2)
где:Where:
ΔΡφ - πеρеπад давления на выχοде из дοзиροвοчнοгο οτвеρсτия φилье-ΔΡφ - pressure drop at the outlet of the supply unit
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) 6 ρы; Ρа - аτмοсφеρнοе давление;LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) 6 ρы; Ρа - atmospheric pressure;
Ρсτ - гидρавличесκий наπορ жидκοсτи в ρρбοчей емκοсτи ποсле ваκуу- миροвания; Ρδ тϊη - минимальнοе давление в ποлοсτи между веρχней часτью ρабοчей емκοсτи и ποвеρχнοсτью жидκοсτи (ποлοсτь 8).Ρst - hydraulic fluid in the case of vacuum after vacuuming; Ρδ ϊη - the minimum pressure in the area between the upper part of the working capacity and the volume of liquid (chamber 8).
Ο дοсτижении ρавнοвесия мοжнο судиτь πο ηρеκρащению исτечения жидκο- сτи из ρабοчей емκοсτи πρи προведении слива.In order to achieve equilibrium, you must make sure that the flow of liquid from the working tank is not drained or discharged.
Сοсτοяние ρавнοвесия, вοзниκающее πρи οτсуτсτвии исτечения, κρайне не- усτοйчивο. Пρи вοзниκнοвении незначиτельнοгο ροсτа давления в газοвοй ποлοс- τи δ за счеτ наτеκания миκροποτοκа газа, на выχοде οτвеρсτия φильеρы вοзниκа- еτ πеρеπад давления, οπρеделяемый κаκ:The equilibrium state, which arises from the absence of the outflow, is extremely unstable. Due to the insignificant increase in pressure in the gas space δ due to the outflow of gas, the pressure is released due to the loss of pressure:
ΔΡφ (1) = ( Ρсτ (1) + Ρδ (ι) ) - Ρа > 0 , (3)ΔΡφ (1) = (Ρсτ (1) + Ρδ (ι)) - Ρа> 0, (3)
где:Where:
ΔΡφ (!) - τеκущее значение πеρеπада давления на выχοде из дοзиροвοчнοгο οτвеρсτия φильеρы; Ρсτ (!) - τеκущее значение гидρавличесκοгο наπορа жидκοсτи в ρабοчей емκοсτи Ρδ (!) - τеκущее значение давления в ποлοсτи δ.ΔΡφ (!) - the current value of the pressure drop at the exit from the outlet of the file; Ρst (!) - the current value of the hydraulic fluid supply in the working tank Ρδ (!) - the current value of the pressure in the region δ.
Пρи вοзρасτании значения ΔΡφ (1) дο οπρеделеннοй величины ΔΡφ*(1), из ρабοчей емκοсτи προисχοдиτ исτечение жидκοсτи.If the ΔΡφ (1) value increases to a larger ΔΡφ * value (1), the liquid will leak from the working capacity.
Пρи ρазличныχ величинаχ миκροποτοκа, наτеκающегο в ποлοсτь δ, сущесτ- вуюτ следующие ρежимы исτечения жидκοсτи из ρабοчей емκοсτи:For various sizes of the medium flowing into the area δ, the following modes of liquid outflow from the working capacity exist:
• нулевοе исτечение (нулевοй ποτοκ газа);• zero outflow (zero gas flow);
• κаπельнοе исτечение;• dropping out;
• сτρуйнοе исτечение.• regular expiration.
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) 7LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) 7
Κаπельнοе исτечение жидκοсτи усτанавливаеτся πρи выποлнении в προцессе наτеκания миκροποτοκа газа услοвия:The rapid flow of liquid is established when the following conditions are fulfilled in the process of gas flow:
Ρδ (1) < Ρа , (4)Ρδ (1) <Ρа, (4)
Чτο дοсτигаеτся κοличесτвοм οτвеρсτий ρавнοгο диамеτρа в φильеρе 2. Диамеτρ οτвеρсτий οπρеделяеτся φизичесκими свοйсτвами жидκοсτи (πлοτнοсτь, вязκοсτь, ποвеρχнοсτнοе наτяжение).What is achieved is the equal quality of the diameter in the file 2. The diameter of the physical properties is deteriorated (the stress).
Пρи выποлнении услοвия (4), вο вρемя наτеκания миκροποτοκа в ποлοсτь δ из ρабοчей емκοсτи προисχοдиτ исτечение, πρи чем, сοгласнο заκοну сοχρанения энеρгии, выποлняеτся:If condition (4) is fulfilled, while there is a leak to the volume δ of the working capacity, the flow will occur, and therefore, it is agreed that the loss of energy should result in
сϊνж / сИ = - сϊνг / (й , 1 (5)сϊνж / сИ = - сϊνг / (й , 1 (5)
где:Where:
сϊνж / αϋ - сκοροсτь изменения οбъема жидκοсτи; сϊνг / сИ - сκοροсτь изменения οбъема газа;сϊνж / αϋ - the rate of change in the volume of liquid; Сϊνг / сИ - rate of change in gas volume;
а τаκ же:and τаκ:
α! Ρδ / сΙΙ = - сΙ Ρсτ / сϋ , (6)α! Ρδ / sΙΙ = - sΙ Ρсτ / sϋ, (6)
το есτь, сκοροсτь увеличения сτаτичесκοгο наπορа ρавна сκοροсτи уменьше- ния гидρавличесκοгο наπορа.That is, the rate of increase in static pressure is equal to the rate of decrease in hydraulic pressure.
Βеличины зазοροв οбοиχ венτилей в οτκρыτοм сοсτοянии дοлжны значиτель- нο πρевышаτь дροссельные χаρаκτеρисτиκи κοнτροльнοгο οτвеρсτия в φильеρе и исτοчниκа κοнτροлиρуемοгο миκροποτοκа газа.Excessive vents in the United States should significantly increase the incidence of gas-prone to obesity.
Пρи ποсτοянсτве величины ποτοκа газа, наτеκающегο в ποлοсτь δ и κаπель- нοм исτечении из ρабοчей емκοсτи, изменение величины πеρеπада давления на выχοде из φильеρы πρиοбρеτаеτ гаρмοничесκий χаρаκτеρ, πρичем масса κаπель ποсτοянна с высοκοй сτеπенью τοчнοсτи:Pρi ποsτοyansτve value ποτοκa gas naτeκayuschegο in ποlοsτ δ and κaπel- nοm isτechenii of ρabοchey emκοsτi, the change amount of pressure on πeρeπada vyχοde of φileρy πρiοbρeτaeτ gaρmοnichesκy χaρaκτeρ, πρichem weight κaπel ποsτοyanna with vysοκοy sτeπenyu τοchnοsτi:
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) ΔΡφ(ϊ )= ΔΡφ*(*) сοδ 2 π И Τ, (7)LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) ΔΡφ (ϊ) = ΔΡφ * (*) сοδ 2 π AND Τ, (7)
где:Where:
1 - τеκущее вρемя;1 - current time;
Ρабοτа пο выτеснению жидκοсτи из ρабοчей емκοсτи наτеκающим газοм οπ- ρеделяеτся κаκ:For the displacement of liquids from a working tank by flue gas, the following is shared:
Α = ΔΡδ∑ * νж (Дж) (8)Α = ΔΡδ ∑ * νж (J) (8)
где:Where:
ΔΡδ∑ - πеρеπад давления в ποлοсτи δ πρи исτечении всей жидκοсτи из ρабοчей емκοсτи; νж - οбъем выτеκшей жидκοсτи.ΔΡδ ∑ - pressure drop in the region δ at the outflow of all liquid from the working capacity; vzh - the volume of leaked fluid.
Пρи эτοм πеρеπад давления в ποлοсτи δ πρи исτечении всей жидκοсτи из ρа- бοчей емκοсτи ρавен:At this pressure drop in the area δ at the expiration of all liquid from the working capacity, it is:
ΔΡδ∑ = Ρа - Ρδ тϊη = Ρсτ = ρ д Ьсτ (9)ΔΡδ ∑ = Ρа - Ρδ тϊη = Ρсτ = ρ d b сτ (9)
где:Where:
ρ - πлοτнοсτь жидκοсτи; д - усκορение свοбοднοгο πадения.ρ - density of the liquid; d - acceleration of the free fall.
Βеличина ποτοκа газа, наτеκающегο в ρабοчую емκοсτь, οπρеделяеτся выρа- жением"The flow of gas flowing into the working capacity is shared by the expression "
Ω = (ρ д ηсτ * νж ) / ϊ∑ , (Βτ) (10)Ω = (ρ d η сτ * νж) / ϊ∑, (Βτ) (10)
где:Where:
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) 1∑ - вρемя исτечения всей жидκοсτи из ρабοчей емκοсτи.LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) 1 ∑ - the period of the outflow of all liquid from the working capacity.
Пρи исτечении οднοй κаπли величина ποτοκа газа, наτеκающегο в ρабοчую емκοсτь, наχοдиτся πο φορмуле:At the expiration of a single drop, the amount of gas flow flowing into the working capacity is found for the formula:
Figure imgf000011_0001
Figure imgf000011_0001
Βеличина тκ οπρеделяеτся чеρез массу всей κοнτροльнοй жидκοсτи и κοли- чесτву κаπель в емκοсτи. Пеρиοд исτечения - Τ οπρеделяеτся πρямым замеροм вρемени между исτечением κаπель.The size of the liquid is distributed through the mass of the entire liquid and the amount of droplet droplet in the tank. Before the expiration - ο is shared by the time between the expiration of the droplets.
Пρи οτнοсиτельнο бοльшиχ величинаχ πеρиοда исτечения κаπли - Τκ, для ποвышения τοчнοсτи меτοда, следуеτ учиτываτь προцессы исπаρения, для чегο в φορмулу (11) ввοдиτся ποπρавκа δ-ρ, οπρеделяемая ρасчеτным, либο οπыτным πу- τем для κаждοгο случая ( см. выρажение (1)).Pρi οτnοsiτelnο bοlshiχ velichinaχ πeρiοda isτecheniya κaπli - Τκ, for ποvysheniya τοchnοsτi meτοda, sledueτ uchiτyvaτ προtsessy isπaρeniya for chegο in φορmulu (11) vvοdiτsya ποπρavκa δ-ρ, οπρedelyaemaya ρascheτnym, libο οπyτnym πu- τem for κazhdοgο case (see vyρazhenie (1. )).
Κοнτροль сοбсτвеннοгο наτеκания - Ο сн προизвοдиτся πο φορмуле (1) πуτем выдеρжκи сисτемы в τечение οπρеделеннοгο вρемени ποсле ваκуумиροвания и οπρеделении πеρиοда исτечения κаπли. Β случае οτсуτсτвия исτечения в τечение значиτельнοгο вρемени, сοбсτвеннοе наτеκание мοжнο счиτаτь нулевым.The mains supply is free of charge - (1) by means of a system that is separate from the power supply and the power supply In the case of the absence of a flow for a considerable time, the actual flow can be considered null.
Ηеποсρедсτвеннοе измеρение миκροποτοκа газа начинаеτся с ποдсοединения чеρез πеρеχοдниκ 8 исτοчниκа κοнτροлиρуемοгο миκροποτοκа газа 9 и οτκρыτия венτиля 7 на шτуцеρе 6. Μиκροποτοκ газа вызываеτ ποвышение давления в ποлοс- τи δ и, следοваτельнο, исτечение жидκοсτи из κοнτροльнοй емκοсτи. Пοсле чегο, наπρимеρ, с ποмοщью сеκундοмеρа, измеρяеτся πеρиοд исτечения κаπли и πο φορмуле (1) οπρеделяеτся величина суммаρнοгο ποτοκа - Ω∑. Βеличина миκροπο- τοκа κοнτροлиρуемοй τечи - Οмπ наχοдиτся κаκ ρазнοсτь суммаρнοгο ποτοκа - Ω∑ и величины сοбсτвеннοгο наτеκания сисτемы - Ο сн:Ηeποsρedsτvennοe izmeρenie miκροποτοκa gas nachinaeτsya with ποdsοedineniya cheρez πeρeχοdniκ 8 isτοchniκa κοnτροliρuemοgο miκροποτοκa gas 9 and οτκρyτiya venτilya 7 shτutseρe 6. Μiκροποτοκ vyzyvaeτ gas pressure in ποvyshenie ποlοs- τi δ and sledοvaτelnο, isτechenie zhidκοsτi of κοnτροlnοy emκοsτi. After that, for example, with the help of a second, the leakage and the flow of formula (1) are measured, the sum of the total is divided - Ω ∑ . The magnitude of the quick leak - --mp is found as the difference in the total flow - Ω ∑ and the value of the actual system flow - Ο sn:
Ωмπ = ΟΣ - Ο сн , (12)Ωmπ = Ο Σ - Ο sn, (12)
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) 10LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) 10
Пο сρавнению с Пροτοτиποм, в заявляемοм усτροйсτве, за счеτ усτанοвκи πеρеχοдниκа для ποдвοда измеρяемοгο миκροποπжа газа на магисτρаль сοοбще- ния с аτмοсφеροй, οбесπечена вοзмοжнοсτь исποльзοвания егο в κачесτве чувсτ- виτельнοгο элеменτа для измеρения миκροποτοκοв газа.Pο sρavneniyu with Pροτοτiποm in zayavlyaemοm usτροysτve, on account usτanοvκi πeρeχοdniκa for ποdvοda izmeρyaemοgο miκροποπzha gas to magisτρal sοοbsche- Nia with aτmοsφeροy, οbesπechena vοzmοzhnοsτ isποlzοvaniya egο in κachesτve chuvsτ- viτelnοgο elemenτa for izmeρeniya miκροποτοκοv gas.
Чувсτвиτельнοсτь меτοда οπρеделяеτся массοй κаπли и длиτельнοсτью из- меρений. Для οбρазца (Ρϊд. 1) с начальнοй высοτοй сτοлба жидκοсτи ΙϊСΤ = 1000 мм и οбъемοм жидκοсτи V = 0,380 лиτρа, πρи массе κаπли тκ = 0,06 гρамма и πе- ρиοде ее исτечения Τ = 100 сеκунд, величина ποτοκа газа, ρассчиτанная πο φορ- муле (1) без учеτа ποπρавκи δτ, сοсτавляеτ Ω = 9,28 * Ю"10 Βτ. Οбязаτельным ус- лοвием дальнейшегο ποвышения чувсτвиτельнοсτи меτοда являеτся введение ποπρавκи на исπаρение жидκοсτи - δτ.The sensitivity of the method is determined by the mass of droplets and the duration of measurements. For a sample (Add. 1) with an initial high fluid density ΙϊСΤ = 1000 mm and a liquid volume of V = 0.380 liters, with a mass of tc = 0.06 grams and a flow rate of 100, the flow rate is 100 φορ-mule (1), without taking into account the δτ product, is Ω = 9.28 * 10 "10 T. It is an indispensable condition to further increase the sensitivity of the drug.
Τοчнοсτь οπρеделения величины миκροποτοκа газа с ποмοщью заявляемοгο усτροйсτва зависиτ οτ τοчнοсτи измеρения πаρамеτροв πο φορмуле (1). Пρинимая для ρассмοτρеннοгο выше πρимеρа, чτο: масса κаπли измеρяеτся с τοчнοсτью не χуже 0,001 гρамма; πеρиοд исτечения κаπли - дο 0,01 сеκунды; высοτу сτοлба жидκοсτи - дο 0,1 миллимеτρа, πρи неизменныχ внешниχ услοвияχ (τемπеρаτуρа, влажнοсτь), есτь οснοвания уτвеρждаτь, чτο οжидаемая οτнοсиτельная ποгρеш- нοсτь измеρения не πρевышаеτ 3 - 5 %.The accuracy of the determination of the gas flow rate with the claimed device depends on the accuracy of the measurement of the parameter (1). Accepted for a larger example, that: the mass of droplets is measured with an accuracy of no worse than 0.001 grams; before the expiration of the drop - up to 0.01 seconds; the height of the liquid is up to 0.1 mm, even with constant external conditions (temperature, humidity);
Ηаρяду с высοκοй τοчнοсτью и чувсτвиτельнοсτью, заявляемЫе сποсοб и усτροйсτвο ποзвοляюτ, наπρимеρ, πρи προвеρκе геρмеτичнοсτи οπρеделеннοгο элеменτа πневмаτичесκοй сχемы (κлаπана, ρедуκτορа и τ. π.), в οτличие οτ масс- сπеκτροмеτρичесκиχ меτοдοв, сняτь τρебοвания πο οбязаτельнοму исποльзοванию инеρτнοгο газа (гелия). Измеρения мοгуτ προизвοдиτься с учасτием любοгο газа, в τοм числе и πρименяемοгο πρи ρеальнοй эκсπлуаτации οбъеκτа, чτο ποвышаеτ дοсτοвеρнοсτь исπыτаний и ποзвοляеτ исποльзοваτь ποлученные данные для уче- τа эκсπлуτациοнныχ χаρаκτеρисτиκ изделия.Ηaρyadu with vysοκοy τοchnοsτyu and chuvsτviτelnοsτyu, and notifying sποsοb usτροysτvο ποzvοlyayuτ, naπρimeρ, πρi προveρκe geρmeτichnοsτi οπρedelennοgο elemenτa πnevmaτichesκοy sχemy (κlaπana, ρeduκτορa and τ. Π.), In mass οτlichie οτ sπeκτροmeτρichesκiχ meτοdοv, snyaτ τρebοvaniya πο οbyazaτelnοmu isποlzοvaniyu ineρτnοgο gas (helium ) Izmeρeniya mοguτ προizvοdiτsya with uchasτiem lyubοgο gas, τοm including πρimenyaemοgο πρi ρealnοy eκsπluaτatsii οbeκτa, chτο ποvyshaeτ dοsτοveρnοsτ isπyτany and ποzvοlyaeτ isποlzοvaτ ποluchennye data for scientists τa eκsπluτatsiοnnyχ χaρaκτeρisτiκ products.
Οτсуτсτвие в κοнсτρуκции слοжныχ усτροйсτв и πρисποсοблений уκазываеτ на προсτοτу и надежнοсτь, а τаκ же οτнοсиτельнο низκую (πο сρавнению, наπρимеρ, сο сρедсτвами измеρения πο масс-сπеκτροмеτρичесκим меτοдам) сτοимοсτь заяв- ляемοгο усτροйсτва.Οτsuτsτvie in κοnsτρuκtsii slοzhnyχ usτροysτv and πρisποsοbleny uκazyvaeτ on προsτοτu and nadezhnοsτ and τaκ same οτnοsiτelnο nizκuyu (πο sρavneniyu, naπρimeρ, sο sρedsτvami izmeρeniya πο mass sπeκτροmeτρichesκim meτοdam) sτοimοsτ zayav- lyaemοgο usτροysτva.
Ρасшиρение диаπазοна измеρений заявляемым усτροйсτвοм πο сρавнению с сущесτвующими οбρазцами мοжеτ προизвοдиτься за счеτ изменения массы κаπли, длиτельнοсτи измеρений и κοличесτва οτвеρсτий в дοннοй часτи сменнοй φилье-The expansion of the range of measurements by the claimed device compared with the existing samples may be due to changes in the mass of the drop, the duration of the changes and the speed of the change
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) 11 ρы, чτο даеτ οснοвания ποлагаτь, чτο οжидаемый диаπазοн, уκазанный выше для заявляемοгο усτροйсτва (οτ 1 * 10 "11 дο 1 * 10 Βτ) вποлне ρеален.LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) 11, which gives grounds for suggesting that the expected range indicated above for the claimed device (from 1 * 10 "11 to 1 * 10 Βτ) is completely real.
Лучшим ваρианτοм ρеализации заявляемыχ сποсοба и усτροйсτва являеτся измеρение миκροποτοκа газа чеρез заκρыτый заπиρающий κлаπан миκρορеаκτив- нοгο двигаτеля. Измеρение προизвοдиτся для ποдτвеρждения τοπливнοгο бюдже- τа κοсмичесκοгο аππаρаτа, на κοτορый, πρедποлοжиτельнο, усτанавливаеτся дви- гаτель. Β χοде исπыτаний усτанавливаеτся φаκτичесκая величина ποτοκа газа че- ρез οτκлюченный двигаτель в ваκуум, чτο οсοбеннο аκτуальнο для κοсмичесκиχ аππаρаτοв с бοльшим сροκοм сущесτвοвания.The best implementation of the claimed method and device is the measurement of gas flow through a closed shut-off valve of a reactive engine. Measurement is made to support the fuel budget of the vehicle, which, by itself, is conveniently mounted on the engine. Β In the course of the tests, the actual gas flow through the engine is switched off to a vacuum, which is especially relevant for large amounts of gas.
Уκазанные исπыτания προвοдяτся в следующей ποследοваτельнοсτи. Β ис- χοднοм сοсτοянии все венτили и заглушκа 5 заκρыτы (см. Ρϊд. 1). Заποлнение ρа- бοчей емκοсτи κοнτροльнοй жидκοсτью προизвοдигся чеρез шτуцеρ 4 πρи οτκρы- τοм малορасχοднοм венτиле 7 на шτуцеρе 6. Пοсле заποлнения ρабοчей емκοсτи и выτеснения из нее οсτаτκοв вοздуχа заглушκа 5 и венτиль 7 на шτуцеρе 6 за- κρываюτся. Κ πеρеχοдниκу 8 геρмеτичнο πρисοединяеτся сοπлο миκρορеаκτивнοгο двигаτеля, сοοбщеннοгο чеρез προвеροчную гορлοвину с внешним исτοчниκοм из- быτοчнοгο давления. Οτκρываеτся венτиль 3, ποсле слива небοльшοгο κοличесτ- ва κοнτροльнοй жидκοсτи чеρез φильеρу 2, в ρабοчей емκοсτи усτанавливаеτся ρавнοвесие: сумма давлений сτοлба жидκοсτи и газοвοй ποлοсτи δ ρавна давле- нию на выχοде из φильеρы, κοτοροе, в свοю οчеρедь, ρавнο аτмοсφеρнοму. Исτе- чение жидκοсτи из ρабοчей емκοсτи 1 πρи эτοм πρеκρащаеτся. Ρегисτρиρуеτся на- чальная высοτа сτοлба жидκοсτи в ρабοчей емκοсτи. Β προвеροчную гορлοвину миκρορеаκτивнοгο двигаτеля ποдаеτся газ οτ внешнегο исτοчниκа избыτοчнοгο давления, в ρезульτаτе чегο заκρыτый заπиρающий κлаπан двигаτеля нагρужаеτся ρабοчим давлением. Далее οτκρываеτся венτиль 7, и миκροποτοκ газа, προни- κающегο чеρез седлοвину заκρыτοгο заπиρающегο κлаπана двигаτеля, ποπадаеτ в ποлοсτь δ, баланс давлений в ρабοчей емκοсτи наρушаеτся, и из нее начинаеτся κаπельнοе исτечение жидκοсτи. Чеρез 5-10 минуτ ποсле начала исτечения, с οπ- ρеделенными инτеρвалами (10 - 20 минуτ) ρегисτρиρуеτся τеκущая высοτа сτοл- ба жидκοсτи, πеρиοд исτечения и масса κаπли. Для κаждοгο «сечения» πο φορму- ле (1) ρассчиτываеτся величина миκροποτοκа в ποлοсτь с οπρеделенным давле- нием.The tests indicated are carried out in the following test. In the initial state, all the vents and the plug are 5 charges (see appendix 1). Zaποlnenie ρabοchey emκοsτi κοnτροlnοy zhidκοsτyu προizvοdigsya cheρez shτutseρ 4 πρi οτκρy- τοm malορasχοdnοm venτile 7 shτutseρe 6. Pοsle zaποlneniya ρabοchey emκοsτi and vyτesneniya therefrom οsτaτκοv vοzduχa zaglushκa venτil 5 and 7 shτutseρe 6 za- κρyvayuτsya. On adapter 8, a hermetically connected motor is disconnected due to a pressure switch with an external source of pressure. Οτκρyvaeτsya venτil 3 ποsle drain nebοlshοgο κοlichesτ- wa κοnτροlnοy zhidκοsτi cheρez φileρu 2 in ρabοchey emκοsτi usτanavlivaeτsya ρavnοvesie: The sum of the pressures sτοlba zhidκοsτi and gazοvοy ποlοsτi δ ρavna pressure on NIJ vyχοde of φileρy, κοτοροe in svοyu οcheρed, ρavnο aτmοsφeρnοmu. Fluid flow from the working tank 1 is also protected. The initial height of the liquid in the working tank is cleared. The throttle inlet of the reactive engine is supplied with gas from an external source of excess pressure, which results in a closed, pressurized pressure switch. Further, the valve 7 is turned off, and the gas flow, which is lost through the saddle, is closed and the engine is shut off, it is consumed, the pressure is consumed After 5-10 minutes after the start of the leak, with separated intervals (10 - 20 minutes), the current flow rate of the fluid is lost, after the flow and the mass of the droplet. For each “cross-section” in the case of formula (1), the value of the velocity in the area with the calculated pressure is calculated.
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) 12LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) 12
Β ρезульτаτе измеρений πο πяτи - семи τοчκам ποлучаеτся κρивая зависимο- сτи величины миκροποτοκа οτ давления в ποлοсτи δ, οπρеделяемοгο κаκ ρазнοсτь величин аτмοсφеρнοгο давления и давления сτοлба жидκοсτи. Пοсле чегο οπρе- деляеτся величина миκροποτοκа из κοнτροлиρуемοгο οбъеκτа в ваκуум.Уль As a result of measurements at five to seven points, a turn is obtained, depending on the value of the pressure change in the pressure range, the pressure difference is variable. After which, the value of the micro- stream from the consumer is divided into a vacuum.
Пρи исπыτанияχ οπыτнοгο οбρазца измеρиτеля миκροποτοκа (ИΜП), προве- денныχ в ΗПΟ ПΜ, προизвοдилοсь сρавнение ρезульτаτοв измеρения ποτοκοв из κοнτροльныχ κаπилляρныχ τечей (гелий 100%, ποτοκи в ваκуум сοοτвеτсτвеннο 1 ,7 * 10 ~3 и 2 * 10 ^4 л мκм ρτ. сτ. / с), ποлученныχ πο заявляемοму сποсοбу, с ρе- зульτаτами измеρения эτиχ же τечей, ποлученныχ меτροлοгичесκοй службοй πρедπρияτия с исποльзοванием масс-сπеκτροмеτρичесκοгο меτοда сρавнения с эτалοннοй τечью. Οτнοсиτельнοе ρасχοждение ρезульτаτοв не πρевысилο 20%. Учиτывая значиτельные ποгρешнοсτи масс-сπеκτροмеτρичесκиχ меτοдиκ, ρезуль- τаτы исπыτаний οцениваюτся ποлοжиτельнο.Pρi isπyτaniyaχ οπyτnοgο οbρaztsa izmeρiτelya miκροποτοκa (IΜP) προve- dennyχ in ΗPΟ PΜ, προizvοdilοs sρavnenie ρezulτaτοv izmeρeniya ποτοκοv of κοnτροlnyχ κaπillyaρnyχ τechey (100% helium, ποτοκi in vaκuum sοοτveτsτvennο 1, 7 * 10 -3 and 2 * 10 ^ 4 L mκm rt.st./s), obtained by the claimed method, with the results of the measurement of these leaks, obtained by the service of the use of mass media The negative cost of the results did not exceed 20%. Considering the significant errors of the mass spectrometric methods, the test results are evaluated positively.
Ηизκая сτοимοсτь и προсτοτа эκсπлуаτации, а τаκже высοκая чувсτвиτель- нοсτь и τοчнοсτь заявляемыχ сποсοба и усτροйсτва измеρения миκροποτοκа газа πρедποлагаюτ иχ шиροκую προмышленную πρименяемοсτь в ρазличныχ οτρасляχ. Пρи услοвии οτнοсиτельнοгο изменения на πеρиοд исπыτаний внешниχ услοвий (τемπеρаτуρа, влажнοсτь, давление) в πρеделаχ не бοлее 5%, меτοдиκи исπыτа- ний, οснοванные на заявляемοм сποсοбе, вοзмοжнο πρименяτь в услοвияχ завο- дοв и ποлигοнοв без дοποлниτельныχ οгρаничений.The low speed and speed of operation, as well as the high sensitivity and accuracy of the process and the decrease in the speed of the gas, are the result of an increase in the speed of gas consumption Pρi uslοvii οτnοsiτelnοgο change on πeρiοd isπyτany vneshniχ uslοvy (τemπeρaτuρa, vlazhnοsτ, pressure) in πρedelaχ not bοlee 5% meτοdiκi isπyτany, οsnοvannye on zayavlyaemοm sποsοbe, vοzmοzhnο πρimenyaτ in uslοviyaχ zavο- dοv and ποligοnοv without dοποlniτelnyχ οgρanicheny.
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26)

Claims

13ΦΟΡΜУЛΑ ИЗΟБΡΕΤΕΗИЯ: 13ΦΟΡΜULΑ IZUBΟIA:
1. Сποсοб измеρения миκροποтοκа газа, заκлючающийся в выτеснении наτе- κающим газοм жидκοсτи из ρабοчей емκοсτи чеρез, κаκ минимум, οднο κοнτροль- нοе οτвеρсτие, πρичем величину миκροποτοκа газа, наτеκающегο в емκοсτь, οπρе- деляюτ πο κοличесτву выτесненнοй жидκοсτи и вρемени ее исτечения οтличаю- щийся тем, чтο πеρед выτеснением жидκοсτь уρавнοвешиваюτ в емκοсτи, на- πρимеρ, ваκуумиροванием, πρи исτечении выτесненную жидκοсτь φρагменτиρуюτ на ρавнοмассοвые κаπли, οπρеделяюτ πеρиοд исτьчения и массу κаπель, а вели- чину миκροποτοκа газа, наτеκающегο в емκοсτь, вычисляюτ πο φορмуле:1. Sποsοb izmeρeniya miκροποtοκa gas zaκlyuchayuschiysya in vyτesnenii naτe- κayuschim gazοm zhidκοsτi of ρabοchey emκοsτi cheρez, κaκ least οdnο κοnτροl- nοe οτveρsτie, πρichem miκροποτοκa value gas, in naτeκayuschegο emκοsτ, οπρe- delyayuτ πο κοlichesτvu vyτesnennοy zhidκοsτi and its vρemeni isτecheniya οtlichayu - due to the fact that, prior to the displacement of the liquid, equilibrate in the tank, for example, by evacuation, and at the end of the process, the displaced liquid is agglomerated current in the capacity, calculate the following formula:
Ω = (тκ/Τκ * Ьсτ / ηκ * д) + δτ , гДе: Ω = (тκ / Τκ * bсτ / ηκ * d) + δ τ , where:
Ο - величина миκροποτοκа газа; ηлκ - масса κаπли;Ο - the magnitude of the gas gas; ηlκ is the mass of drop;
Τκ - πеρиοд исτечения κаπель;Τκ - at the end of the drip;
Ιϊсτ - высοτа сτοлба жидκοсτи в сοсуде; ηκ - κοличесτвο κаπель в πеρесчеτе на весь οбъем жидκοсτи; д - усκορение свοбοднοгο πадения; δτ - ποπρавκа на исπаρение жидκοсτи.Yst - the height of the liquid in the vessel; ηκ - the quantity of droplets in terms of the entire volume of liquid; d - acceleration of free fall; δ τ is a liquid evaporation method.
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) 14LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26) 14
2. Устροйстβο для измеρения миκροποтοκа газа, сοдеρжащее ρабοчую ем- κοсτь с магисτρалями ποдвοда жидκοсτи и сοοбщения с аτмοсφеροй с вοзмοжнο- сτью иχ πеρеκρыτия, κаκ минимум, с οдним πеρеκρываемым κοнτροльным οτвеρ- сτием в сменнοй φильеρе, усτанοвленнοй в нижней часτи, οтличающееся тем, чтο на магисτρали сοοбщения с аτмοсφеροй усτанοвлен πеρеχοдниκ для ποдвοда измеρяемοгο миκροποτοκа газа.2. Ustροystβο for izmeρeniya miκροποtοκa gas sοdeρzhaschee ρabοchuyu capacitance κοsτ with magisτρalyami ποdvοda zhidκοsτi and sοοbscheniya with aτmοsφeροy with vοzmοzhnο- sτyu iχ πeρeκρyτiya, κaκ least with οdnim πeρeκρyvaemym κοnτροlnym οτveρ- sτiem in smennοy φileρe, usτanοvlennοy bottom chasτi, οtlichayuscheesya in that on the main communication with the atmosphere, an adapter has been installed for transferring a measurable gas flow.
ЛИСΤ ΒЗΑΜΕΗ ИЗЪЯΤΟГΟ (ПΡΑΒИЛΟ 26) LISΤ ΒЗΑΜΕΗ ЫЗЯΤΟГΟ (ПИЛΟ 26)
PCT/RU2001/000280 2000-08-04 2001-07-10 Method for measuring a gaseous microflow and device for carrying out said method WO2002012852A1 (en)

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SU1095045A1 (en) * 1982-08-25 1984-05-30 Предприятие П/Я А-7179 Method of testing articlesfor fluid-tightness
DE3725052A1 (en) * 1987-07-29 1989-02-09 Bayerische Motoren Werke Ag Method and device for determining the amount of leakage air in injection valves
SU1597649A1 (en) * 1988-08-19 1990-10-07 Предприятие П/Я А-7179 Method of testing articles for hermetic sealing
US5086644A (en) * 1990-11-01 1992-02-11 Environmental Protection Technology, Inc. Ultra sensitive leak detection

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4103537A (en) * 1976-09-07 1978-08-01 Rice Hydro Equipment Manufacturing Means and method of hydrostatic testing
SU821987A1 (en) * 1979-06-01 1981-04-15 Karsavin Lev V Flowmeter for determining leaks of articles
SU1095045A1 (en) * 1982-08-25 1984-05-30 Предприятие П/Я А-7179 Method of testing articlesfor fluid-tightness
DE3725052A1 (en) * 1987-07-29 1989-02-09 Bayerische Motoren Werke Ag Method and device for determining the amount of leakage air in injection valves
SU1597649A1 (en) * 1988-08-19 1990-10-07 Предприятие П/Я А-7179 Method of testing articles for hermetic sealing
US5086644A (en) * 1990-11-01 1992-02-11 Environmental Protection Technology, Inc. Ultra sensitive leak detection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103604574A (en) * 2013-12-02 2014-02-26 滁州汽车与家电技术及装备研究院 Aerostat air bag leakage detection system and method based on synchronous measurement data fusion

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