CN104634701A - Liquid viscosity measurement method based on falling balls - Google Patents
Liquid viscosity measurement method based on falling balls Download PDFInfo
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- CN104634701A CN104634701A CN201410670885.6A CN201410670885A CN104634701A CN 104634701 A CN104634701 A CN 104634701A CN 201410670885 A CN201410670885 A CN 201410670885A CN 104634701 A CN104634701 A CN 104634701A
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- bead
- liquid viscosity
- pulley
- falling
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Abstract
The invention discloses a liquid viscosity measurement method based on falling balls. A bracket is arranged; two pulleys are arranged on two sides of the bracket; the balls and a weight source are connected with each other through leads and slide through the two pulleys; a label is arranged on each lead; and the movement speeds of the labels are detected through a plurality of speed sensors to be analyzed, so as to obtain the speeds when the balls fall into a to-be-tested liquid at constant speeds, so that the viscosity of the to-be-tested liquid is accurately calculated through the falling speeds of the balls according to the falling ball stockhaus formula.
Description
Technical field
The present invention relates to a kind of measuring method, particularly relate to a kind of liquid viscosity measuring method based on falling sphere, belong to Survey control field.
Background technology
Global problems are now undoubtedly energy problem, because the war that the energy causes is also countless, and following interstate competition is main or energy war.Therefore the viscosity studying oil is most important, can judge the level at oil place thus tell its purity by viscosity test data, can judge whether the oil content in test zone is exploited with decision like this.Like this can saving resource, wasting manpower and material resources is not having value geographically.The quality of society commodity is also the problem merited attention very much, some drink, and milk powder all adulterates other harmful compositions, and viscosity is used to the important indicator judging its material.
At present, in the method measuring liquid viscosity, use the most generally falling ball method, namely in a glass infuser vertically placed, fill with the liquid for measuring, glass infuser does two marks to delimit a segment distance on glass infuser, timing when bead falls to the first mark in a liquid from the top of glass infuser, timing is stopped to during the second mark, by the movement velocity of the distance determination bead between the time interval and mark, at the diameter according to bead and glass infuser, the parameter such as bead and fluid density calculates the viscosity of liquid.But timing mode conventional is at present visual inspection measurement or laser measurement, but gross visualization also exists certain error, affects last result.The equipment price of laser measurement is expensive, inconvenient use for laboratory.
Such as application number is a kind of driver element of " 201210568729.X " and the liquid viscosity measurement instrument containing this driver element.The liquid viscosity measurement instrument of the present invention driver element that can send electric impulse signal replaces traditional alternating current generator with the stepper motor that this electric impulse signal can be converted into displacement, the drive mechanism of gear set and cam set, train of reduction gears and anti-motor reversal device are given up, greatly simplify the structure of viscosity measuring instrument, simultaneously by the expanded range of rotating speed to 0.01rpm ~ 700rpm.In addition, the rotating speed of the stepper motor that this invention adopts and the change of voltage or electric current have nothing to do, traditional AC motor rotary speed unstabilization and problem of easily rocking under voltage or electric current non-steady state can be eliminated, thus minimizing measuring error, this invention measuring accuracy and method optimization need to be improved further.
And for example application number is a kind of liquid viscosity detector of " 201320739700.3 ", comprise base, base is provided with container, it is characterized in that: in described container, be provided with stirring apparatus and temperature sensor, and the bottom in container is provided with pick-up unit, pick-up unit is electrically connected with time set, and temperature sensor is electrically connected with attemperating unit, attemperating unit electrical connection stirring apparatus.Should
utility modeluse photoelectricity door to measure, ensure that the precision of measurement, reduce the cost measuring viscosity of liquid, improve the efficiency of experiment, this invention measuring accuracy and method optimization need to be improved further.
For another example application number is a kind of high temperature high pressure liquid device for measuring viscosity and the measuring method of " 201410008655.3 ", described measurement mechanism comprises High Temperature High Pressure system and measuring system, described measuring system, comprises drive motor, torque sensor, driving magnetic cylinder, induction magnetic cylinder, rotating shaft and paddle; Described torque sensor, one end is connected with described drive motor, and the other end is connected with described driving magnetic cylinder; Described driving magnetic cylinder, rotates with described torque sensor; Described induction magnetic cylinder, is positioned at described driving magnetic cylinder inner, rotates under magneticaction with described driving magnetic cylinder; Described rotating shaft, one end is connected with described induction magnetic cylinder one end away from described torque sensor, and the other end is connected with described paddle, and described rotating shaft part is positioned at described High Temperature High Pressure system; Described paddle, is positioned at described High Temperature High Pressure system, and described paddle comprises multi-disc around the symmetrically arranged blade of described rotating shaft, and this invention measuring accuracy and method optimization need to be improved further.
Summary of the invention
Technical matters to be solved by this invention provides a kind of liquid viscosity measuring method based on falling sphere for the deficiency of background technology, accurately can measure the falling speed of bead at liquid by multiple sensor; Testing liquid viscosity is accurately calculated by the speed that bead falls according to Shi Tuoke formula.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
Based on a liquid viscosity measuring method for falling sphere, it is characterized in that: specifically comprise following steps:
Step 1, if a support, is provided with two pulleys on described support both sides, bead and weight source is passed through lead-in wire and is connected and passes through two pulleys slips;
Step 2, lead-in wire is provided with a label;
Step 3, is analyzed by the movement velocity of multiple speed pickup tags detected, and then show that bead falls into speed when testing liquid at the uniform velocity falls;
Step 4, velograph when at the uniform velocity falling according to bead calculates liquid viscosity, is specially:
M
beadg-F
floating-F
sticky-m
weight sourceg-F
pulley=0;
Obtain η=1/6 π rv (m
beadg-π r
3ρ g
4/3-m
weight sourceg-2m
weight sourceg μ
resistance);
R is the radius of bead, and η is testing liquid viscosity, and v is bead falling speed, μ
resistancefor the resistance coefficient of pulley, g is acceleration of gravity, m
beadfor the quality of bead, ρ is fluid density, m
weight sourcefor the quality of Mass Sources, F
floatingfor the buoyancy that bead is subject to, F
stickyfor the power that liquid viscosity produces to bead, F
pulleyfor the resistance of pulley;
Step 5, is shown by display unit in real time by the testing liquid viscosity drawn.
As a kind of liquid viscosity measuring method based on falling sphere of the present invention, described pulley is fixed pulley.
As a kind of liquid viscosity measuring method based on falling sphere of the present invention, described speed detection unit is GSH5 speed pickup.
As a kind of liquid viscosity measuring method based on falling sphere of the present invention, described display unit is LCD display.
As a kind of liquid viscosity measuring method based on falling sphere of the present invention, described bead is high temperature resistant, corrosion resistant substance.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1, the inventive method simple, be easy to realize;
2, the present invention accurately can measure the falling speed of bead at liquid by multiple sensor;
3, the present invention accurately calculates testing liquid viscosity by falling sphere Shi Tuoke formula by the speed that bead falls.
Embodiment
Below technical scheme of the present invention is described in further detail:
Based on a liquid viscosity measuring method for falling sphere, it is characterized in that: specifically comprise following steps:
Step 1, if a support, is provided with two pulleys on described support both sides, bead and weight source is passed through lead-in wire and is connected and passes through two pulleys slips;
Step 2, lead-in wire is provided with a label;
Step 3, is analyzed by the movement velocity of multiple speed pickup tags detected, and then show that bead falls into speed when testing liquid at the uniform velocity falls;
Step 4, velograph when at the uniform velocity falling according to bead calculates liquid viscosity, is specially:
M
beadg-F
floating-F
sticky-m
weight sourceg-F
pulley=0;
Obtain η=1/6 π rv (m
beadg-π r
3ρ g
4/3-m
weight sourceg-2m
weight sourceg μ
resistance);
R is the radius of bead, and η is testing liquid viscosity, and v is bead falling speed, μ
resistancefor the resistance coefficient of pulley, g is acceleration of gravity, m
beadfor the quality of bead, ρ is fluid density, m
weight sourcefor the quality of Mass Sources, F
floatingfor the buoyancy that bead is subject to, F
stickyfor the power that liquid viscosity produces to bead, F
pulleyfor the resistance of pulley;
Step 5, is shown by display unit in real time by the testing liquid viscosity drawn.
Wherein, described pulley is fixed pulley, and described speed detection unit is GSH5 speed pickup., described display unit is LCD display, and described bead is high temperature resistant, corrosion resistant substance.
The present invention is mainly through a support, there is pulley on both sides respectively, while put the bead of a certain mass, another side puts a constant weight source, two objects are connected by a smooth lead-in wire, stride across two fixed pulleys to slide, multiple sensor is put at the steel pole of centre, lead-in wire is put a label, by the motion of multiple speed pickup tags detected, data analysis process and then speed when drawing bead uniform motion are detected to multiple sensor, bead is allowed to fall to entering in testing liquid, accelerated motion is done when bead has just dropped into liquid, along with the increase of its speed, the viscous force that it receives constantly increases, until be rationally zero suffered by it, at this moment bead at the uniform velocity falls according to the equilibrium condition of object, and then go out liquid viscosity by calculated with mathematical model.Specific as follows:
Velograph when at the uniform velocity falling according to bead calculates liquid viscosity, is specially:
M
beadg-F
floating-F
sticky-m
weight sourceg-F
pulley=0;
Obtain η=1/6 π rv (m
beadg-π r
3ρ g
4/3-m
weight sourceg-2m
weight sourceg μ
resistance);
R is the radius of bead, and η is testing liquid viscosity, and v is bead falling speed, μ
resistancefor the resistance coefficient of pulley, g is acceleration of gravity, m
beadfor the quality of bead, ρ is fluid density, m
weight sourcefor the quality of Mass Sources, F
floatingfor the buoyancy that bead is subject to, F
stickyfor the power that liquid viscosity produces to bead, F
pulleyfor the resistance of pulley;
Input block is for inputting above parameter.
This programme method structure is simple, is easy to realize, but the on-line measurement under being not suitable for site environment.The control system that the present invention relates to is AVR single chip, has prefetched instruction function, namely when an execution instruction, in advance next instruction is got into, and call instruction can be performed within a clock period; Multiple accumulator type, data processing speed is fast; AVR single chip has 32 general purpose working registers, and being equivalent to has 32 viaducts, can fast passing; Response time is fast.AVR single chip has multiple fixing interrupt vector entry address, can respond interruption fast; AVR single chip power consumption is low.For typical power consumption situation, be 100nA when WDT closes, be more suitable for battery powered application apparatus; The minimum 1.8V of some devices gets final product work; AVR single chip security performance is good.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.Above embodiments of the present invention are explained in detail, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, makes a variety of changes under can also or else departing from the prerequisite of present inventive concept.
Claims (5)
1., based on a liquid viscosity measuring method for falling sphere, it is characterized in that: specifically comprise following steps:
Step 1, if a support, is provided with two pulleys on described support both sides, bead and weight source is passed through lead-in wire and is connected and passes through two pulleys slips;
Step 2, lead-in wire arranges a label;
Step 3, is analyzed by the movement velocity of multiple speed pickup tags detected, and then show that bead falls into speed when testing liquid at the uniform velocity falls;
Step 4, velograph when at the uniform velocity falling according to bead calculates liquid viscosity, is specially:
M
beadg-F
floating-F
sticky-m
weight sourceg-F
pulley=0;
Obtain η=1/6 π rv (m
beadg-π r
3ρ g
4/3-m
weight sourceg-2m
weight sourceg μ
resistance);
R is the radius of bead, and η is testing liquid viscosity, and v is bead falling speed, μ
resistancefor the resistance coefficient of pulley, g is acceleration of gravity, m
beadfor the quality of bead, ρ is fluid density, m
weight sourcefor the quality of Mass Sources, F
floatingfor the buoyancy that bead is subject to, F
stickyfor the power that liquid viscosity produces to bead, F
pulleyfor the resistance of pulley;
Step 5, is shown by display unit in real time by the testing liquid viscosity drawn.
2. a kind of liquid viscosity measuring method based on falling sphere according to claim 1, is characterized in that: described pulley is fixed pulley.
3. a kind of liquid viscosity measuring method based on falling sphere according to claim 1, is characterized in that: described speed detection unit is GSH5 speed pickup.
4. a kind of liquid viscosity measuring method based on falling sphere according to claim 1, is characterized in that: described display unit is LCD display.
5. a kind of liquid viscosity measuring method based on falling sphere according to claim 1, is characterized in that: described bead is high temperature resistant, corrosion resistant substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410670885.6A CN104634701A (en) | 2014-11-21 | 2014-11-21 | Liquid viscosity measurement method based on falling balls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410670885.6A CN104634701A (en) | 2014-11-21 | 2014-11-21 | Liquid viscosity measurement method based on falling balls |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104634701A true CN104634701A (en) | 2015-05-20 |
Family
ID=53213695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410670885.6A Withdrawn CN104634701A (en) | 2014-11-21 | 2014-11-21 | Liquid viscosity measurement method based on falling balls |
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|---|---|
| CN (1) | CN104634701A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109219741A (en) * | 2016-01-19 | 2019-01-15 | 维斯科高有限公司 | Measure the device and method of liquid viscosity |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201945534U (en) * | 2010-12-28 | 2011-08-24 | 德州学院 | Tester for viscosity coefficient of liquid by means of lifting ball |
-
2014
- 2014-11-21 CN CN201410670885.6A patent/CN104634701A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201945534U (en) * | 2010-12-28 | 2011-08-24 | 德州学院 | Tester for viscosity coefficient of liquid by means of lifting ball |
Non-Patent Citations (1)
| Title |
|---|
| 王玉清，任新成: "落球法测液体粘度实验的改进", 《大学物理》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109219741A (en) * | 2016-01-19 | 2019-01-15 | 维斯科高有限公司 | Measure the device and method of liquid viscosity |
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Application publication date: 20150520 |