CN104458507B - The method injecting liquid measure liquid surface tension coefficient in circular groove - Google Patents
The method injecting liquid measure liquid surface tension coefficient in circular groove Download PDFInfo
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- CN104458507B CN104458507B CN201410705744.3A CN201410705744A CN104458507B CN 104458507 B CN104458507 B CN 104458507B CN 201410705744 A CN201410705744 A CN 201410705744A CN 104458507 B CN104458507 B CN 104458507B
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Abstract
The method injecting liquid measure liquid surface tension coefficient in circular groove relates to the measurement of physical parameter.Circular groove is made up of two cylinders and a shared seal base with identical central axis, has an aperture on the seal base of circular groove.Circular groove is placed on a table top, the aperture of circular groove is outer unsettled at table top, a measuring cup is placed in the lower section of aperture, take the liquid that volume is Q1 to pour in circular groove, when standing does not has liquid to drip below aperture, from the volume Q2 of the liquid that measuring cup reads, measure outer cylinder inner radius rOutwardWith inner cylinder outer radius rIn, liquid surface tension coefficient is σ=[ρ * (Q1 Q2) * g]/[2 π * (rOutward+rIn)].Provide the benefit that: if the precision measuring quality or volume is sufficiently high, then the maximum error of this device be exactly a drop quality produced by gravity, so error is less；Simple in construction, with low cost.
Description
Technical field
The present invention relates to the measurement of the measurement of physical parameter, particularly liquid surface tension coefficient.
Background technology
The method measuring liquid surface tension coefficient common are: largest air bubbles platen press, capillary tube method, Pulling escape etc., measuring method or device are more complicated, such as largest air bubbles platen press, Pulling escape；The precision measured is the highest, although capillary tube method is simple, but liquid level bends, the insufficient height measuring fluid column is accurate, owing to the liquid level outside capillary tube rises also along the tube wall outside capillary tube, therefore, relatively difficult at the coordinate figure of the horizontal level determining liquid level, thus cause determining that the difference in height of the fluid column inside capillary tube is relatively difficult.
Summary of the invention
The present invention proposes a kind of novel method for surface tension measurement.
The technical scheme is that
The structure of measurement apparatus: circular groove is made up of two cylinders and a shared seal base with identical central axis, the top of the outside of inner cylinder, the inner side of outer cylinder and seal base constitutes the useful space of circular groove, having an aperture on the seal base of circular groove, aperture is through hole.
Measuring method 1: circular groove is placed on a table top, table top has spirit bubble, base has level(l)ing device, and make table-surface level when measuring liquid surface tension coefficient, the aperture of circular groove is outer unsettled at table top, a measuring cup is placed in the lower section of aperture, take a certain amount of liquid and pour in circular groove, if the volume of liquid is Q1, liquid is had to drip below the amount aperture to be ensured of this liquid, when standing does not has liquid to drip below aperture, measuring cup below aperture reads the volume Q2 of the liquid being dropped in measuring cup from aperture, measure outer cylinder inner radius rOutwardWith inner cylinder outer radius rIn, then liquid surface tension coefficient is σ=[ρ * (Q1-Q2) * g]/[2 π * (rOutward+rIn)], wherein σ is liquid surface tension coefficient, and ρ is the density of liquid, and g is acceleration of gravity, and π is pi.
Measuring method 2: measure outer cylinder inner radius rOutwardWith inner cylinder outer radius rIn, then, circular groove is placed on the measurement table top of an electronic balance, circular groove center and measurement table top center alignment, the base of regulation balance makes the spirit bubble of balance be designated as level, aperture on the seal base of circular groove is outer unsettled at measurement table top, quality m1 during liquid is not had inside record circular groove, a measuring cup is placed in the lower section of aperture, take a certain amount of liquid and pour in circular groove, liquid is had to drip below the amount aperture to be ensured of this liquid, when standing does not has liquid to drip below aperture, record circular groove and gross mass m2 of the internal liquid adhered to of circular groove, then liquid surface tension coefficient is σ=[(m2-m1) * g]/[2 π * (rOutward+rIn)], wherein σ is liquid surface tension coefficient, and g is acceleration of gravity, and π is pi.
The invention has the beneficial effects as follows: at circular groove interior surface tension force adsorptive liquid, liquid portion beyond surface tension absorbability, ooze out from small hole at bottom part, to aperture drop formed below, along with gradually oozing out of liquid, weight at drop is more than surface tension (σ * L) produced by the circle (setting Zhou Changwei L) that drop contacts with lower surface, and drop will be dropped in the measuring cup below aperture；When circular groove interior surface tension force can adsorb the weight of all liq within circular groove, stopping is oozed out by liquid, liquid is no longer had to be dropped in the measuring cup below aperture or other container, now the state below aperture is smooth or has a drop poised, therefore, if the precision measuring quality or volume is sufficiently high, then the maximum error of this device be exactly a drop quality produced by gravity, so error is less；The quality of surface tension adsorptive liquid can being multiplied obtains with volume (obtaining from the change of graduated cylinder volume) by the density (looking into temperature and density mapping table) of liquid, it is also possible to is directly measured by balance and obtains the increment of its quality and obtain；Measurement apparatus simple in construction, measures with low cost.
Accompanying drawing explanation
Fig. 1 is circular groove schematic diagram, and Fig. 2 is circular groove elevational schematic.
Wherein, 1, circular groove, 2, aperture, rOutward, outer cylinder inner radius, rIn, inner cylinder outer radius.
Detailed description of the invention
Circular groove 1 is made up of two cylinders and a shared seal base with identical central axis, the top of the outside of inner cylinder, the inner side of outer cylinder and seal base constitutes the space of circular groove 1, having an aperture 2, aperture 2 on the seal base of circular groove 1 is through hole；Circular groove 1 is placed on a table top (table top has spirit bubble, base has level(l)ing device), its aperture 2 is outer unsettled at table top, place a measuring cup in the lower section of aperture 2, take a certain amount of liquid and pour in circular groove 1, if the volume of liquid is Q1, the lower section of the amount aperture to be ensured 2 of this liquid has liquid to drip, when standing does not has liquid to drip below aperture 2, read the volume Q2 of the liquid being dropped in measuring cup from aperture 2 from measuring cup, measure outer cylinder inner radius rOutwardWith inner cylinder outer radius rIn, the numerical value of radius also is able to be obtained by measurement diameter, then liquid surface tension coefficient is σ=[ρ * (Q1-Q2) * g]/[2 π * (rOutward+rIn)], wherein σ is liquid surface tension coefficient, and ρ is the density (can consult the density meter of this liquid according to ambient temperature to obtain) of liquid, and g is acceleration of gravity, and π is pi.
It also is able to circular groove 1 is placed on the measurement table top of an electronic balance (circular groove 1 center and measurement table top center alignment), the base of regulation balance makes the spirit bubble of balance be designated as level, balance typically has spirit bubble, its base to have level adjuster, and the aperture 2 of circular groove 1 is measuring outer unsettled (the diameter r of table topOutwardMore than the radius R, such as r that measure table topOutward=2R is it is possible to realize), quality m1 of record circular groove 1, a measuring cup or other container is placed in the lower section of aperture 2, take a certain amount of liquid and pour in circular groove 1, the lower section of the amount aperture to be ensured 2 of this liquid has liquid to drip, when standing does not has liquid to drip below aperture 2, record circular groove 1 and gross mass m2 of the internal liquid adhered to of circular groove 1, then liquid surface tension coefficient is σ=[(m2-m1) * g]/[2 π * (rOutward+rIn)], wherein σ is liquid surface tension coefficient, and g is acceleration of gravity, and π is pi.
Claims (2)
1. the method injecting liquid measure liquid surface tension coefficient in circular groove, it is characterized in that: circular groove is made up of two cylinders and a shared seal base with identical central axis, the top of the outside of inner cylinder, the inner side of outer cylinder and seal base constitutes the useful space of circular groove, having an aperture on the seal base of circular groove, aperture is through hole；Circular groove is placed on a table top, table top has spirit bubble, base has level(l)ing device, and make table-surface level when measuring liquid surface tension coefficient, the aperture of circular groove is outer unsettled at table top, a measuring cup is placed in the lower section of aperture, take a certain amount of liquid and pour in circular groove, if the volume of liquid is Q1, liquid is had to drip below the amount aperture to be ensured of this liquid, when standing does not has liquid to drip below aperture, the measuring cup below aperture reads the volume Q2 of the liquid being dropped in measuring cup from aperture, measures outer cylinder inner radius rOutwardWith inner cylinder outer radius rIn, then liquid surface tension coefficient is σ=[ρ * (Q1-Q2) * g]/[2 π * (rOutward+rIn)], wherein σ is liquid surface tension coefficient, and ρ is the density of liquid, and g is acceleration of gravity, and π is pi.
2. the method injecting liquid measure liquid surface tension coefficient in the circular groove simplified, it is characterized in that: circular groove is made up of two cylinders and a shared seal base with identical central axis, the top of the outside of inner cylinder, the inner side of outer cylinder and seal base constitutes the useful space of circular groove, having an aperture on the seal base of circular groove, aperture is through hole；Measure outer cylinder inner radius rOutwardWith inner cylinder outer radius rIn；Circular groove is placed on the measurement table top of an electronic balance, circular groove center and measurement table top center alignment, the base of regulation electronic balance makes the spirit bubble of balance be designated as level, aperture on the seal base of circular groove is outer unsettled at measurement table top, quality m1 during liquid is not had inside record circular groove, a measuring cup or other container is placed in the lower section of aperture, take a certain amount of liquid and pour in circular groove, liquid is had to drip below the amount aperture to be ensured of this liquid, when standing does not has liquid to drip below aperture, record circular groove and gross mass m2 of the internal liquid adhered to of circular groove, then liquid surface tension coefficient is σ=[(m2-m1) * g]/[2 π * (rOutward+rIn)], wherein σ is liquid surface tension coefficient, and g is acceleration of gravity, and π is pi.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410705744.3A CN104458507B (en) | 2014-12-01 | 2014-12-01 | The method injecting liquid measure liquid surface tension coefficient in circular groove |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410705744.3A CN104458507B (en) | 2014-12-01 | 2014-12-01 | The method injecting liquid measure liquid surface tension coefficient in circular groove |
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| Publication Number | Publication Date |
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| CN104458507A CN104458507A (en) | 2015-03-25 |
| CN104458507B true CN104458507B (en) | 2016-09-28 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106596350A (en) * | 2016-12-13 | 2017-04-26 | 常州大学 | Bracket for measuring surface tension of liquid by use of double liquid surfaces of pore plate and measurement method |
| CN110927022A (en) * | 2019-11-20 | 2020-03-27 | 四川大学 | Method for measuring surface tension coefficient of liquid |
| CN114324071B (en) * | 2021-12-31 | 2023-05-16 | 四川大学 | Method for measuring surface tension coefficient of liquid by breaking liquid drop |
| CN114324072B (en) * | 2022-01-17 | 2023-06-02 | 四川大学 | Method for measuring surface tension coefficient of liquid by sheet method |
| CN114383979B (en) * | 2022-01-21 | 2023-05-02 | 四川大学 | Method for measuring surface tension coefficient of liquid by liquid drop method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2089635U (en) * | 1991-03-21 | 1991-11-27 | 北京大学 | Surface tension measuring device by volume |
| JP3826315B2 (en) * | 1996-07-05 | 2006-09-27 | 可伸 安部 | Equipment for measuring surface tension of molten metal |
| JP2004129113A (en) * | 2002-10-07 | 2004-04-22 | Aiphone Co Ltd | Drain structure of doorphone slave unit |
| CN102636416B (en) * | 2012-04-13 | 2013-08-07 | 四川大学 | Automatic horizontal hanging ring for measuring surface tension of liquid by using abruption method |
| CN203324142U (en) * | 2013-07-05 | 2013-12-04 | 浙江农林大学 | Liquid surface tension coefficient tester based on droplet contrast method |
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Granted publication date: 20160928 Termination date: 20171201 |