CN109269939A - Sash weight volume calibration method - Google Patents
Sash weight volume calibration method Download PDFInfo
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- CN109269939A CN109269939A CN201811291718.5A CN201811291718A CN109269939A CN 109269939 A CN109269939 A CN 109269939A CN 201811291718 A CN201811291718 A CN 201811291718A CN 109269939 A CN109269939 A CN 109269939A
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- pure water
- sash weight
- temperature
- volume
- sash
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/08—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by measuring buoyant force of solid materials by weighing both in air and in a liquid
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- Health & Medical Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention discloses sash weight volume calibration methods, corresponding pure water standard density under laboratory's environment temperature of the 15oC ~ 35oC provided according to nineteen ninety international temperature scale pure water density meter, every 0.1oC is corresponding with different pure water density, therefore the calibration of sash weight volume is carried out using pure water, only it needs to be determined that pure water temperature, it can table look-up and know the density of pure water, thus according to Archimedes principleF It is floating=G Row=ρLiquid gV Row, the normal volume of sash weight at such a temperature is calculated.Calibration method of the present invention stablizes the temperature of pure water in a fixed value, avoids sash weight volume calibration because of error caused by temperature inaccuracy, keeps volume calibration more accurate and reliable.
Description
Technical field
The present invention relates to a kind of sash weight volume calibration method, more particularly, to fuel oil, gasoline or other fluid densities is surveyed
The high accuracy calibration method of the sash weight volume of amount.
Background technique
The raising of the precision, reliability of fuel quantity system has important influence to airplane synthetic efficiency.Battle
For bucket machine, its payload, voyage and combat radius can be greatly increased by improving oil measurement precision；And to civil aircraft and
Speech, then can substantially improve its economy.The measurement accuracy of existing fuel quantity system can only achieve full quarter in the sky
4% or so of degree, it is usually tens tons that general large transport airplane, which is fully loaded with oil mass, even if calculating by 1% precision, error also has several
Hundred kilograms.In order to realize that the high-acruracy survey of aircraft fuel oil oil mass (quality), the measuring precision have been increased to the 1%+ of indicated value
The 0.75% of full oil value, to guarantee the oil measurement precision, has been increased to 0.4% to the real-time accuracy of fuel density.Aircraft
The measurement of fuel density is generally measured using temperature sensor indirectly in the case where the past, fuel measurement precision was not high, by
The temperature of temperature sensor measurement fuel oil extrapolates fuel density further according to the relation indirect of fuel density and temperature.Because of temperature
Sensor itself has measurement error, in addition the fuel oil of the same trade mark causes indirectly because its different density of the place of production also has differences
The density error measured is larger, far from the high-acruracy survey demand for meeting modern aircraft and proposing to fuel measuring system.
Therefore nowadays the measurement of density generally uses density sensor directly to measure in high-precision fuel measuring system, to guarantee
Density measure error reaches 0.4% high-precision requirement, not only needs to be guaranteed from design, it is also necessary to testing inspection means
To verify density sensor under total temperature environment with the performance of high-precision density measure.To guarantee density sensor in full temperature
The detection under environment to generating sets precision is spent, needs precisely to survey the standard density under fuel oil total temperature environment
Amount, using the density of sash weight and balance system detection fuel oil, sash weight normal volume is determined by laboratory periodic calibration, is passed
The method that the sash weight volume calibration mode of system uses Dimensions metrology, this method are missed by sash weight verticality, surface roughness and instrument
The influence of difference, the volumetric errors for calibrating out are larger, far from the needs for meeting standard of fuel density measure.
Summary of the invention
The purpose of the present invention is in view of the deficiencies of the prior art mentioned above, propose that a kind of error is small, accurately and reliably hangs
Hammer body accumulates calibration method.
In order to achieve the above object, sash weight volume calibration method provided by the invention, it is characterised in that: including walking as follows
It is rapid:
Sash weight is cleaned up with pure water in the metastable experimental enviroment of temperature and dries spare, assay balance is set by S1
In in support platform and to be adjusted to horizontality spare；The pure water that can sufficiently submerge sash weight by purity not less than 98% pours into burning
It is spare in cup；
S2 opens assay balance power supply, carries calibrating weight with assay balance and calibrated；
S3 will weigh on assay balance that sash weight is placed in after calibration, and the reading value that balance reading to be analyzed records after stablizing is described
Reading value be the aerial quality m of sash weight Air ；
Sash weight is put into the beaker equipped with pure water by S4, then with the temperature of pure water in platinum resistance thermometer detection beaker, record
Pure water temperature value t；
Sash weight is fixed on assay balance by S5 by enameled wire, should ensure that the water surface is greater than to sash weight upper surface distance when fixed
50mm, to ensure that sash weight is sufficiently submerged in pure water, if sash weight surface is attached with bubble, should slowly shake sash weight makes removal of bubbles, with
Guarantee that the pure water volume excluded is the true volume of sash weight, weigh to the sash weight in pure water, balance reading to be analyzed is stablized
Assay balance reading value, as quality m of the sash weight in pure water are recorded afterwards Pure water ；
The length of enameled wire in pure water is immersed in S6, measurementlAnd record length value；
S7 looks into international temperature scale pure water density meter, the standard density value of pure water when record temperature is tρ；
S8 is calculated the volume of sash weight discharge pure water by formula (1)V 1
V 1 =(m Air - m Pure water )/ ρ ；(1)
S9 is calculated the volume for immersing enameled wire in pure water by formula (2)V 2
V 2 =П (0.09)2 l；(2)
S10 calculates volume of the sash weight in temperature t by formula (3)V
V= V 1 - V 2 , (3)
Record temperature t, sash weight volumeV, complete calibration.
Further, the metastable experimental enviroment of temperature refers to the test room environmental of the oC of 15 oC ~ 35 in step S1.
Further, it is calibrated after assay balance preheating 1h in step S2.
Further, sash weight is put into the beaker equipped with pure water and keeps 5h in step S4, it is ensured that sash weight temperature and pure water temperature
Unanimously, for the temperature to be checked measured when drift reaches stable no more than 0.05 oC pure water temperature in 2min, start recording is at this time
Pure water temperature value t.
Further, in step S5 sash weight hanging in the beaker of pure water when should ensure that the water surface is greater than to sash weight upper surface distance
50mm, to ensure that sash weight is sufficiently submerged in pure water, if sash weight surface is attached with bubble, should slowly shake sash weight makes removal of bubbles, with
Guarantee that the pure water volume excluded is the true volume of sash weight.
Sash weight volume calibration method of the invention has following good effect.
Accurately and reliably.The present invention carries out the calibration of sash weight volume using pure water, according to nineteen ninety international temperature scale pure water density
Corresponding pure water standard density under the laboratory's environment temperature for the oC of 15 oC ~ 35 that table provides, every 0.1 oC are corresponding with different
Pure water density, therefore using the calibration of pure water progress sash weight volume, it is only necessary to determine pure water temperature, so that it may table look-up and know pure water
Density, thus according to Archimedes principleF It is floating=G Row=ρLiquid gV Row, the normal volume of sash weight at such a temperature is calculated.This hair
Bright calibration method stablizes the temperature of pure water in a fixed value, avoids sash weight volume calibration because missing caused by temperature inaccuracy
Difference keeps volume calibration more accurate and reliable.
Reasonable.The present invention is more applicable in compared to traditional sash weight volume calibration method more reasonable, can be full
Within the scope of sufficient density sensor total temperature performance detection need, guarantee density sensor simulate completely aircraft practical service environment into
Row ground detection.
Detailed description of the invention
Fig. 1 is the calibration instrument of sash weight volume calibration method of the invention and the arrangement schematic diagram of tool.
In figure, 1. support platforms, 2. assay balances, 3. enameled wires, 4. beakers, 5. sash weights, 6. pure water.
Specific embodiment
Referring to Fig. 1, sash weight volume calibration method, characterized by the following steps:
S1, in the metastable experimental enviroment of temperature, sash weight 5 is cleaned up with pure water 6 and dry it is spare, by assay balance
2 are placed in support platform 1 and to be adjusted to horizontality spare；The pure water 6 that can sufficiently submerge sash weight by purity not less than 98% falls
Enter spare in beaker 4；
S2 opens 2 power supply of assay balance, carries calibrating weight with assay balance 2 and calibrated；
S3, by sash weight 5 be placed in calibration after assay balance 2 on weigh, the reading value recorded after 2 stable reading of balance to be analyzed,
The reading value is the aerial quality m of sash weight 5 Air ；
Sash weight 5 is put into the beaker 4 equipped with pure water 6 by S4, then with the temperature of pure water 6 in platinum resistance thermometer detection beaker 4
Degree records 6 temperature value t of pure water；
Sash weight 5 is fixed on assay balance 2 by S5 by 3 hanging of enameled wire, should ensure that the water surface to 5 upper surface of sash weight when fixed
Distance is greater than 50mm, and to ensure that sash weight 5 is sufficiently submerged in pure water 6, if 5 surface of sash weight is attached with bubble, should slowly shake sash weight 5 makes
Removal of bubbles, to guarantee that 6 volume of pure water excluded as the true volume of sash weight 5, weighs to the sash weight 5 in pure water 6, wait divide
2 reading value of assay balance, as quality m of the sash weight 5 in pure water 6 are recorded after analysing 2 stable reading of balance Pure water ；
The length of enameled wire 3 in pure water 6 is immersed in S6, measurementlAnd record length value；
S7 looks into international temperature scale pure water density meter, the standard density value of pure water 6 when record temperature is tρ；
S8 calculates the volume that pure water is discharged in sash weight 5 by formula (1)V 1
V 1 =(m Air - m Pure water )/ ρ ；(1)
S9 is calculated the volume for immersing enameled wire 3 in pure water 6 by formula (2)V 2
V 2 =П (0.09)2 l；(2)
S10 calculates volume of the sash weight 5 in temperature t by formula (3)V
V= V 1 - V 2 , (3)
Record temperature t, 5 volume of sash weightV, complete calibration.
Further, the metastable experimental enviroment of temperature refers to the test room environmental of the oC of 15 oC ~ 35 in step S1.
Further, assay balance 2 is calibrated after preheating 1h in step S2.
Further, sash weight 5 is put into the beaker 4 equipped with pure water 6 and keeps 5h in step S4, it is ensured that 5 temperature of sash weight and pure water 6
Temperature is consistent, the temperature to be checked measured in 2min drift no more than 0.05 oC pure water, 6 temperature reach stable when, start recording
6 temperature value t of pure water at this time.
Further, in step S5 5 hanging of sash weight in the beaker 4 of pure water 6 when should ensure that the water surface to 5 upper surface distance of sash weight
Greater than 50mm, to ensure that sash weight 5 is sufficiently submerged in pure water 6, if 5 surface of sash weight is attached with bubble, should slowly shake sash weight 5 makes bubble
It excludes, to guarantee 6 volume of pure water excluded as the true volume of sash weight 5.
Claims (5)
1. sash weight volume calibration method, characterized by the following steps:
Sash weight is cleaned up with pure water in the metastable experimental enviroment of temperature and dries spare, assay balance is set by S1
In in support platform and to be adjusted to horizontality spare；The pure water that can sufficiently submerge sash weight by purity not less than 98% pours into burning
It is spare in cup；
S2 opens assay balance power supply, carries calibrating weight with assay balance and calibrated；
S3 will weigh on assay balance that sash weight is placed in after calibration, and the reading value that balance reading to be analyzed records after stablizing is described
Reading value be the aerial quality m of sash weight Air ；
Sash weight is put into the beaker equipped with pure water by S4, then with the temperature of pure water in platinum resistance thermometer detection beaker, record
Pure water temperature value t；
Sash weight is fixed on assay balance by S5 by enameled wire, should ensure that the water surface is greater than to sash weight upper surface distance when fixed
50mm, to ensure that sash weight is sufficiently submerged in pure water, if sash weight surface is attached with bubble, should slowly shake sash weight makes removal of bubbles, with
Guarantee that the pure water volume excluded is the true volume of sash weight, weigh to the sash weight in pure water, balance reading to be analyzed is stablized
Assay balance reading value, as quality m of the sash weight in pure water are recorded afterwards Pure water ；
The length of enameled wire in pure water is immersed in S6, measurementlAnd record length value；
S7 looks into international temperature scale pure water density meter, the standard density value of pure water when record temperature is tρ；
S8 is calculated the volume of sash weight discharge pure water by formula (1)V 1
V 1 =(m Air - m Pure water )/ ρ ；(1)
S9 is calculated the volume for immersing enameled wire in pure water by formula (2)V 2
V 2 =П (0.09)2 l；(2)
S10 calculates volume of the sash weight in temperature t by formula (3)V
V= V 1 - V 2 , (3)
Record temperature t, sash weight volumeV, complete calibration.
2. sash weight volume calibration method according to claim 1, it is characterised in that: the metastable examination of temperature in step S1
Test the test room environmental that environment refers to the oC of 15 oC ~ 35.
3. sash weight volume calibration method according to claim 1, it is characterised in that: in step S2 after assay balance preheating 1h
It is calibrated.
4. sash weight volume calibration method according to claim 3, it is characterised in that: sash weight is put into equipped with pure water in step S4
Beaker in keep 5h, it is ensured that sash weight temperature is consistent with pure water temperature, and the temperature measured drift in 2min to be checked is not more than
When 0.05 oC pure water temperature reaches stable, the pure water temperature value t of start recording at this time.
5. according to claim 1, the described in any item sash weight volume calibration methods in 2,3 or 4, it is characterised in that: hung in step S5
It should ensure that the water surface is greater than 50mm to sash weight upper surface distance when hammering hanging into shape in the beaker of pure water, to ensure that it is pure that sash weight is sufficiently submerged in
Water, if sash weight surface is attached with bubble, should slowly shake sash weight makes removal of bubbles, to guarantee the pure water volume excluded as sash weight
True volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811291718.5A CN109269939A (en) | 2018-10-31 | 2018-10-31 | Sash weight volume calibration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811291718.5A CN109269939A (en) | 2018-10-31 | 2018-10-31 | Sash weight volume calibration method |
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| Publication Number | Publication Date |
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| CN109269939A true CN109269939A (en) | 2019-01-25 |
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ID=65192262
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811291718.5A Pending CN109269939A (en) | 2018-10-31 | 2018-10-31 | Sash weight volume calibration method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455366A (en) * | 2019-08-20 | 2019-11-15 | 江苏厚生新能源科技有限公司 | A kind of test method of lithium battery diaphragm volume |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3933211A (en) * | 1973-09-04 | 1976-01-20 | Mettler Instrumente Ag | Buoyancy balance |
| CN2325772Y (en) * | 1997-04-25 | 1999-06-23 | 赵万山 | Digital displaying type instrument for investigating density |
| CN101042323A (en) * | 2007-04-25 | 2007-09-26 | 上海大学 | Electronic measuring equipment and method for ceramic volumetric density |
| CN201340374Y (en) * | 2008-12-17 | 2009-11-04 | 西安航天化学动力厂 | Density measuring device for solid materials |
| CN102023121A (en) * | 2010-11-11 | 2011-04-20 | 朱茜 | Petroleum hydrometer calibration device and method |
| CN105806741A (en) * | 2014-12-31 | 2016-07-27 | 郑州旭飞光电科技有限公司 | Ultra-thin glass density testing device and testing method |
-
2018
- 2018-10-31 CN CN201811291718.5A patent/CN109269939A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3933211A (en) * | 1973-09-04 | 1976-01-20 | Mettler Instrumente Ag | Buoyancy balance |
| CN2325772Y (en) * | 1997-04-25 | 1999-06-23 | 赵万山 | Digital displaying type instrument for investigating density |
| CN101042323A (en) * | 2007-04-25 | 2007-09-26 | 上海大学 | Electronic measuring equipment and method for ceramic volumetric density |
| CN201340374Y (en) * | 2008-12-17 | 2009-11-04 | 西安航天化学动力厂 | Density measuring device for solid materials |
| CN102023121A (en) * | 2010-11-11 | 2011-04-20 | 朱茜 | Petroleum hydrometer calibration device and method |
| CN105806741A (en) * | 2014-12-31 | 2016-07-27 | 郑州旭飞光电科技有限公司 | Ultra-thin glass density testing device and testing method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110455366A (en) * | 2019-08-20 | 2019-11-15 | 江苏厚生新能源科技有限公司 | A kind of test method of lithium battery diaphragm volume |
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Application publication date: 20190125 |