CN104568656A - Liquid density measuring device and measuring method - Google Patents
Liquid density measuring device and measuring method Download PDFInfo
- Publication number
- CN104568656A CN104568656A CN201310496262.7A CN201310496262A CN104568656A CN 104568656 A CN104568656 A CN 104568656A CN 201310496262 A CN201310496262 A CN 201310496262A CN 104568656 A CN104568656 A CN 104568656A
- Authority
- CN
- China
- Prior art keywords
- bracing wire
- lever
- fulcrum
- dynamometry
- float
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
The invention discloses a liquid density measuring device and measuring method. A floater, a lever, a fulcrum pull line and a force measuring pull line are arranged in a container; the floater is connected with one end of the lever; one end of the fulcrum pull line is fixedly connected with the fulcrum of the lever; the other end of the fulcrum pull line is fixed on a fixing point inside the container below the lever; one end of the force measuring pull line is fixedly connected with a force measuring end of a force sensor; the other end of the force measuring pull line is fixedly connected with the lever; after amplification, wave filtration and A/D conversion, an electric signal of the force sensor is processed by a single chip microcomputer, and the measurement result is displayed on a display. The liquid density measuring device is simple in structure, accurate in measurement and applicable to dynamic or static automatic liquid density measurement.
Description
Technical field
What the present invention relates to is density measuring equipment and measuring method, particularly applies Archimedes buoyancy principle, can measure a kind of device and measuring method measuring fluid density of fluid density rapidly and accurately.
Background technology
Current measurement fluid density can apply multiple principle, method is various, as applied the supercritical ultrasonics technology etc. of the relation between velocity of propagation in different densities liquid of the buoyancy method of Archimedes'law, the resonance tube method of application tube vibration theory, using ultrasound ripple and density.Instrument is varied especially, as float type densimeter, resonant tube type liquidensitometer, ultrasonic liquid densitometer etc.But the error of indication of above-mentioned most instrument is difficult to meet ± 0.002% accuracy requirement, makes it be applied in ask for something pin-point accuracy and measure occasion of fluid density and be restricted, and there is shortcoming in various degree and deficiency in antijamming capability and stability.
Summary of the invention
The object of the invention is to there is the technical matterss such as accuracy of measurement is low, poor stability, complex structure for existing fluid density automatic measurer, a kind of structure is simple, measurement is accurate, it is dynamic to be applicable to or static energy is measured automatically liquid density measurement device and measuring method are provided.
The technical scheme adopted is:
Liquid density measurement device is made up of hardware and software two parts, and hardware components comprises force value sensor, control module, container and is installed in float in container, lever, fulcrum bracing wire and dynamometry bracing wire; Described force value sensor is positioned at above container, is fixedly connected with container, and the output terminal of force value sensor is connected with the respective terminal of control module by wire; Dynamometry bracing wire is arranged in container, and the upper end of dynamometry bracing wire is fixedly connected with the dynamometry end of force value sensor, and the lower end of dynamometry bracing wire is fixedly connected with one end of lever, and the other end of lever is fixedly connected with float; The upper end of fulcrum bracing wire and lever, form fulcrum structure, the lower end of fulcrum bracing wire is fixedly connected with the point of fixity of container bottoms;
Above-mentioned control module, comprises signal amplification circuit, filtering circuit, A/D change-over circuit, single-chip microcomputer and display; The connecting circuit of above-mentioned signal amplification circuit, filtering circuit, A/D change-over circuit, single-chip microcomputer and display is known circuits, and electric signal is processed by single-chip microcomputer after amplification, filtering and A/D conversion, and measurement result is shown over the display.
Above-mentioned software section, comprises sampling subroutine, data processing subroutine and display subroutine; Sampling subroutine and display subroutine adopt known shaping base program, and data processing subroutine comprises the mathematical model of density calculation;
Liquid density measurement method is: when float and lever are immersed in fluid to be measured, the weight of the buoyancy overcoming float produced, lever and bracing wire makes float rise, when float floats to a certain height, lever makes lever maintenance level by the restriction of fulcrum bracing wire and dynamometry bracing wire length; One end and being connected of lever of fulcrum bracing wire a little form fulcrum automatically, and two bracing wires are parallel and with lever in same vertical guide, force value sensor can detect the tension force in dynamometry bracing wire.Then:
(F-W)·l
1＝T·l
2
F-T·l
2／l
1+W
In formula: F-is immersed in the buoyancy that float in fluid to be measured, lever, fulcrum bracing wire and dynamometry bracing wire produce;
The weight of the float of W-buoyancy system, lever, fulcrum bracing wire and dynamometry bracing wire;
Tension force in the bracing wire of T-dynamometry; l
1-buoyancy system barycenter is to the distance of fulcrum; l
2the bracing wire of-dynamometry is to the distance of fulcrum;
Relational expression is finally utilized to draw fluid density:
ρ＝F／gV
In formula: ρ-fluid density;
V-is immersed in the volume of float in fluid to be measured, lever, fulcrum bracing wire and dynamometry bracing wire; G-local gravitational acceleration;
Above-mentioned control module comprises single-chip microcomputer, display and control circuit board; Described control circuit board is changed three parts by signal amplification, filtering and A/D and is formed, and single-chip microcomputer, display are shaped article, and control circuit board adopts known technology to make.
Above-mentioned force value sensor is commercially available finished parts.
Above-mentioned software programming is in single-chip microcomputer.
Principle of work of the present invention:
When fluid to be measured medium leave standstill or when flowing over container, density because of medium is different and produce different buoyancy, the weight of buoyancy overcoming float, lever and bracing wire makes float rise, when float floats to a certain height, lever makes lever maintenance level by the restriction of fulcrum bracing wire and dynamometry bracing wire length; One end and being connected of lever of fulcrum bracing wire a little form fulcrum automatically, and fulcrum bracing wire is parallel with dynamometry bracing wire two bracing wire and with lever in same vertical guide, force value sensor 3 can detect the tension force in dynamometry bracing wire.
The object of this invention is to provide a kind of bob-lever type pin-point accuracy liquid density measurement device and method, be characterized in the fulcrum of lever and force-detecting position be flexible coupling, mechanical friction, and to amplify by the buoyancy of method to float changing lever ratio.Therefore, this device has that accuracy of measurement high (instrument indication error be better than ± 0.002%), antijamming capability are strong, good stability, advantages of simple structure and simple.
Design science of the present invention, reasonable, original, compact overall structure, volume are little, low-power consumption, with low cost, stable performance, reliable, practicality is comparatively strong, has good development prospect.Suitable relevant industrial and mining enterprises and measure monitor department use.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is that control module of the present invention connects block diagram.
Embodiment
Liquid density measurement device is made up of hardware and software two parts, and hardware components comprises force value sensor 3, control module, container 6 and is installed in float 1 in container 6, lever 2, fulcrum bracing wire 5 and dynamometry bracing wire 4; Described force value sensor 3 is positioned at above container 6, is fixedly connected with container 6, and force value sensor 3 is commercially available finished parts, and the output terminal of force value sensor 3 is connected with the respective terminal of control module by wire.Dynamometry bracing wire 4 is arranged in container 6, and the upper end of dynamometry bracing wire 4 is fixedly connected with the dynamometry end of force value sensor 3, and the lower end of dynamometry bracing wire 4 is fixedly connected with one end of lever 2, and the other end of lever 2 is fixedly connected with float 1; The upper end of fulcrum bracing wire 5 is fixedly connected with the middle part of lever 2, and form fulcrum structure, the lower end of fulcrum bracing wire 5 is fixedly connected with the point of fixity of container 6 bottom surface;
Above-mentioned control module, comprises signal amplification circuit, filtering circuit, A/D change-over circuit, single-chip microcomputer and display; The connecting circuit of above-mentioned signal amplification circuit, filtering circuit, A/D change-over circuit, single-chip microcomputer and display is known circuits, and electric signal is processed by single-chip microcomputer after amplification, filtering and A/D conversion, and measurement result is shown over the display.
Above-mentioned software section, comprises sampling subroutine, data processing subroutine and display subroutine; Sampling subroutine and display subroutine adopt known shaping base program, and data processing subroutine comprises the mathematical model of density calculation;
Liquid density measurement method is: when float 1 and lever 2 are immersed in fluid to be measured, the weight of the buoyancy overcoming float 1 produced, lever 2 and bracing wire makes float 1 rise, when float 1 floats to a certain height, lever 2 makes lever 2 maintenance level by the restriction of fulcrum bracing wire 5 and dynamometry bracing wire 4 length; One end and being connected of lever 2 of fulcrum bracing wire 5 a little form fulcrum automatically, and two bracing wires are parallel and with lever 2 in same vertical guide, force value sensor 3 can detect the tension force in dynamometry bracing wire 4.Then:
(F-W)·l
1＝T·l
2
F＝T·l
2／l
1+W
In formula: F-is immersed in the buoyancy that float 1 in fluid to be measured, lever 2 and fulcrum bracing wire 5 and dynamometry bracing wire 4 produce;
The weight of W-buoyancy system float 1, lever 2 and fulcrum bracing wire 5 and dynamometry bracing wire 4;
Tension force in T-dynamometry bracing wire 4; l
1-buoyancy system barycenter is to the distance of fulcrum; l
2-dynamometry bracing wire 4 is to the distance of fulcrum;
Relational expression is finally utilized to draw fluid density:
ρ＝F/gV
In formula: ρ-fluid density;
V-is immersed in the volume of float 1 in fluid to be measured, lever 2 and fulcrum bracing wire 5 and dynamometry bracing wire 4; G-local gravitational acceleration.
Claims (1)
1. liquid density measurement device is made up of hardware and software two parts, and hardware components comprises force value sensor (3), control module, container (6) and is installed in float (1) in container (6), lever (2), fulcrum bracing wire (5) and dynamometry bracing wire (4); It is characterized in that: described force value sensor (3) is positioned at above container (6), is fixedly connected with container (6), and the output terminal of force value sensor (3) is connected with the respective terminal of control module by wire; Dynamometry bracing wire (4) is arranged in container (6), the upper end of dynamometry bracing wire (4) is fixedly connected with the dynamometry end of force value sensor (3), the lower end of dynamometry bracing wire (4) is fixedly connected with one end of lever (2), and the other end of lever (2) is fixedly connected with float (1); The upper end of fulcrum bracing wire (5) is connected with the middle part of lever (2), and form fulcrum structure, the lower end of fulcrum bracing wire (5) is fixedly connected with the point of fixity of container (6) bottom surface;
Above-mentioned software section, comprises sampling subroutine, data processing subroutine and display subroutine; Data processing subroutine comprises the mathematical model of density calculation;
Liquid density measurement method is: when float (1) and lever (2) are immersed in fluid to be measured, the weight of the buoyancy overcoming float (1) produced, lever (2) and bracing wire makes float (1) rise, when float (1) floats to a certain height, lever (2) makes lever (2) keep level by the restriction of fulcrum bracing wire (5) and dynamometry bracing wire (4) length; One end and being connected of lever (2) of fulcrum bracing wire (5) a little form fulcrum automatically, two bracing wires are parallel and with lever (2) in same vertical guide, force value sensor (3) can detect the tension force in dynamometry bracing wire (4); Then:
(F-W)·l
1＝T·l
。
F＝T·l
2／l
1+W
In formula: F-is immersed in the buoyancy that float (1) in fluid to be measured, lever (2) and fulcrum bracing wire (5) and dynamometry bracing wire (4) produce;
The weight of W-buoyancy system float (1), lever (2) and fulcrum bracing wire (5) and dynamometry bracing wire (4);
Tension force in T-dynamometry bracing wire (4); l
1-buoyancy system barycenter is to the distance of fulcrum; l
2-dynamometry bracing wire (4) is to the distance of fulcrum;
Relational expression is finally utilized to draw fluid density:
ρ＝F／gV
In formula: ρ-fluid density;
V-is immersed in float (1), lever (2) in fluid to be measured) and the volume of fulcrum bracing wire (5) and dynamometry bracing wire (4); G-local gravitational acceleration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310496262.7A CN104568656A (en) | 2013-10-20 | 2013-10-20 | Liquid density measuring device and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310496262.7A CN104568656A (en) | 2013-10-20 | 2013-10-20 | Liquid density measuring device and measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104568656A true CN104568656A (en) | 2015-04-29 |
Family
ID=53085235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310496262.7A Pending CN104568656A (en) | 2013-10-20 | 2013-10-20 | Liquid density measuring device and measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104568656A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865573A (en) * | 2016-03-30 | 2016-08-17 | 连云港大发环保科技有限公司 | Liquid level measuring device and measuring method thereof |
| CN109932279A (en) * | 2019-03-19 | 2019-06-25 | 河海大学 | A kind of apparatus and method using bulk strain measurement fluid density |
| CN112284969A (en) * | 2020-10-22 | 2021-01-29 | 东来涂料技术（上海）股份有限公司 | Method for measuring density of coating |
-
2013
- 2013-10-20 CN CN201310496262.7A patent/CN104568656A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105865573A (en) * | 2016-03-30 | 2016-08-17 | 连云港大发环保科技有限公司 | Liquid level measuring device and measuring method thereof |
| CN105865573B (en) * | 2016-03-30 | 2022-07-05 | 江苏大发环保科技有限公司 | Liquid level measuring device and measuring method thereof |
| CN109932279A (en) * | 2019-03-19 | 2019-06-25 | 河海大学 | A kind of apparatus and method using bulk strain measurement fluid density |
| CN109932279B (en) * | 2019-03-19 | 2021-04-06 | 河海大学 | Device and method for measuring liquid density by using volume strain |
| CN112284969A (en) * | 2020-10-22 | 2021-01-29 | 东来涂料技术（上海）股份有限公司 | Method for measuring density of coating |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101762436A (en) | Liquid density measurement device and measurement method | |
| CN102519628B (en) | Coupling measurement device of particle three-dimensional stress and two-dimensional fluid velocity field | |
| CN202631043U (en) | Formation gas volume measurement device of flexible package lithium ion battery | |
| CN203299081U (en) | Real-time liquid density measuring instrument | |
| CN104568656A (en) | Liquid density measuring device and measuring method | |
| CN105092684A (en) | Gas-liquid two-phase flow microbubble volume concentration measurement device | |
| CN203083902U (en) | Magnetic force suspension density tester | |
| CN206479214U (en) | Ultrasonic open-channel meter | |
| CN204882293U (en) | Measure device of gas production volume | |
| CN208333626U (en) | A kind of New fluid level gauge calibrating installation | |
| CN203037314U (en) | Ultrasonic wave liquid level measurement device | |
| CN212008643U (en) | Device for measuring flow velocity of liquid in pipeline and flow velocity measuring pipeline | |
| CN206563754U (en) | A kind of rotary propeller type current meter and acoustic Doppler velocimetry mobile device | |
| CN109580555A (en) | A kind of depth of water transparency Sai Shi disk direct-reading instrument | |
| CN103344523A (en) | Liquid density real-time measurement method | |
| CN209841608U (en) | Irrigation water viscosity coefficient detection device based on magnetostrictive displacement sensor | |
| CN211578186U (en) | Physical measurement tensiometer equipment | |
| CN207300796U (en) | A kind of quick measurement manganese-zinc ferrite sintered density device | |
| CN211013162U (en) | Liquid level detection device for biological oil tank | |
| CN202785139U (en) | Testing device for resetting of hydraulic buffer of elevator | |
| CN211783642U (en) | Differential pressure flowmeter based on MEMS pressure sensor | |
| CN2457578Y (en) | Magnetostriction multipurpose level, temperature and density meter | |
| CN206040067U (en) | Modified frictional head loss experimental apparatus | |
| CN203587151U (en) | Ultrasonic open-channel meter | |
| CN111811777A (en) | Wave glider propulsive force simulation detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |