CN109856007A - Portable specific gravity instrument and specific gravity test method based on air pressure measurement - Google Patents
Portable specific gravity instrument and specific gravity test method based on air pressure measurement Download PDFInfo
- Publication number
- CN109856007A CN109856007A CN201811621088.3A CN201811621088A CN109856007A CN 109856007 A CN109856007 A CN 109856007A CN 201811621088 A CN201811621088 A CN 201811621088A CN 109856007 A CN109856007 A CN 109856007A
- Authority
- CN
- China
- Prior art keywords
- sealing space
- specific gravity
- air pressure
- temperature
- pressure
- 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
Landscapes
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The present invention is a kind of portable specific gravity instrument and specific gravity test method based on air pressure measurement, including a gravity sensor and vent valve is arranged in first sealing space for being put into testee in the first sealing space；Connection is provided with air pump in second sealing space and is inflated to second sealing space by solenoid valve control between second sealing space, with first sealing space；Temperature sensor is arranged in second sealing space, for measuring the temperature before and after pressure change；Pressure sensor is arranged in second sealing space, for measuring pressure；Controller measures timing for controlling, and receives temperature, pressure and gravimetric data and handle.The present invention is calculated by measuring pressure change and correlation formula in same closed container, is completed solid and liquid substance density precise determination to the full extent, is completed energy-saving and environmental protection, loss-free efficient measurement.
Description
Technical field
The present invention relates to specific gravity instrument fields, particularly the portable specific gravity instrument to be a kind of based on air pressure measurement and
Specific gravity test method.
Background technique
With exploration and research in recent years, there is very big progress in China on densitometry, in previous densitometry
On the basis of there has also been very big breakthrough, type is also very various.It is distinguished at present according to the physical property of sample, density tester can divide
For following several major class: water absorption product density of solid tester, water imbibition solid special density tester, powder special density are not surveyed
Determine instrument, Purity of Noble Metals specific weight determine instrument etc..Existing densitometer has tentatively shown the digitlization of density measure instrument
Trend, but its application field and the scope of application are also very limited, and accuracy of measurement is not very high.
It will be seen that metering is made as relying on international unit, constantly with society from the new development that 21 century measures
The needs that can develop and expand new field.During actual metered system more sophisticated, quantitative study also increasingly fills
Entertaining and glamour are expired.It looks forward to the future, in face of many new thinkings of development, densitometry is also required to further strengthen many aspects
Work.It will be closely coupled with all various aspects such as economy, science and technology, politics, human needs, promotes mutually, interacts, no
It is disconnected to move to maturity and perfect.
Since existing specific gravity instrument has higher requirement, the article kind that different specific gravity instrument is capable of measuring to article to be measured
Class is relatively simple.For example, liquid specific gravity instrument cannot measure the article of powdery type.Specific gravity instrument how is made to measure article kind
It is problem to be solved that the increase of class, which can allow the applied enhancing of this specific gravity instrument,.
Summary of the invention
Technical problem to be solved by the present invention lies in first aspect provide it is a kind of based on the portable of air pressure measurement
Specific gravity instrument, first aspect provide a kind of specific gravity test method, using the presence stable in the air of most of object energy, realize lossless
Measurement, has widened measurement type.
The technical solution adopted by the present invention are as follows:
In a first aspect, a kind of portable specific gravity instrument based on air pressure measurement,
Including the first sealing space, for being put into object under test, a gravity sensitive is set in first sealing space
Device and vent valve；
Connection is by solenoid valve control between second sealing space, with first sealing space, in second sealing
Air pump is provided in space to inflate to second sealing space；
Temperature sensor is arranged in second sealing space, for the temperature after measuring before and after temperature pressure change；
Controller measures timing for controlling, and receives temperature, pressure and gravimetric data and handle.
Further, first sealing space is the loading tank that one is cylindrical body, and gravity sensor is placed in loading tank
Bottom.
Further, the volume of first sealing space is 2L.
Further, the volume of second sealing space is 0.48L.
Second aspect, a kind of specific gravity test method,
First sealing space is set, testee is put into, measures the weight of testee；
Second sealing space is set, is separated between first sealing space by solenoid valve,
Solenoid valve is opened, so that the first sealing space is identical as the second sealing space air pressure, measures initial space air pressure P0,
With initial temperature T0；
Close solenoid valve；
It is inflated in toward the first sealing space, the air pressure P in the first sealing space is measured after inflation1, temperature after inflation
Spend T1；
It opens solenoid valve and makes the first sealing space and the second sealing space internal temperature and air pressure balance；
Air pressure P after measurement balance2, temperature T after inflation2；
Measured object volume and density are calculated according to measured parameter.
Further, the volume of first sealing space is 2L.
Further, the volume of second sealing space is 0.48L.
Compared with prior art, the present invention beneficial effect is:
The present invention is calculated by measuring pressure change and correlation formula in same closed container, completes solid (especially
Particulate matter such as soil and the substance that physical-chemical reaction may occur with water) and liquid substance (cannot be by traditional close
Degree meter measures) density precise determination to the full extent, complete energy-saving and environmental protection, loss-free efficient measurement.
For the densimeter of other media, the physical quantity of measurement has temperature, pressure and weight etc., these physics
The precision prescribed of factor is high, can achieve accuracy maximization in air medium.And air dielectric weight is small, measurement side
Just, measurement accuracy it is high, it is easy to operate, belong to dynamic and measure, when measurement, change the selection of gas medium at any time, density value can also be with
Change immediately and updates, direct digital display.
Object being measured cannot centainly react with place medium in densimeter, for comparing liquid, densimeter of the present invention
The kind of object that middle air can measure is mostly very much.Measurement range also increases with it.And the medium of the densitometer can also be with
Artificial adjustment can greatly expand the type of measurement.
Object being measured will not be damaged, protection testee is a key factor in measurement process.Use sky
Gas expands to measure, and rasdiation damage will not be caused to testee, chemical lesion will not be also unable to control substantially
Fuel factor.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of specific gravity instrument of the present invention；
Fig. 2 is controling circuit structure block diagram of the present invention；
Fig. 3 is measured object size, measurement tank size and opens the air pressure measured after solenoid valve, and the function between three closes
It is formula figure, a 0.1L, b 0.5L, c 1L, d 1.5L, e 2.5L, f 6L；
Fig. 4 makees three-dimensional by variable for the air pressure that measures with measured object size, measurement tank size and after opening solenoid valve
Figure；
Fig. 5 is slope figure of the air pressure under different measurement tank volumes, after opening solenoid valve with measured object volume change；
Fig. 6 is the slope figure under optimum measurement tank volume.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Shown in Figure 1, the present invention provides a kind of portable specific gravity instrument based on air pressure measurement,
Including the first sealing space 3, for being put into object under test, gravity biography is set in first sealing space 3
Sensor 2 and vent valve 1；Gravity sensor 2 is placed on the bottom of the first sealing space, can be in order to realize the measurement of liquid
In the bottom of the first sealing space, one pallet or measuring cup are set.First sealing space has sealing cover, will be to after opening
It surveys after object is put into and seals again.
Connection is empty by the control of solenoid valve 4 and the first sealing between second sealing space 5, with first sealing space 3
Between be connected or isolation, be provided in second sealing space 5 air pump 7 to second sealing space inflation；Setting one
Temperature sensor 6 is in second sealing space, for measuring the temperature before and after pressure change；It is provided with pressure sensor 8
Measure air pressure.
Be arranged a controller for control measure timing, and receive temperature, pressure and gravimetric data and handle, control
The open and close of solenoid valve.
Whole device is arranged on a pedestal 9.
In one embodiment, the first sealing space is the loading tank that one is cylindrical body, and gravity sensor is placed in loading
The bottom of tank.The volume of first sealing space is 2L.
In one embodiment, the second sealing space is the measurement tank of a cylindrical body, volume 0.48L.
About the volume settings of measurement tank, loading tank and testee volume, due to the higher air pressure of precision on the market
Transducer range is all in 2 standard atmospheric pressures or so, thus, it is supposed that air pump is all filled with 1.5 into measurement tank when measuring every time
The gas of standard atmospheric pressure or so.It, can be by calculating to obtain measured object size, measurement tank size in the case where loading tank size is 2L
And open the air pressure P measured after solenoid valve2Functional relation between this three, thus formula can obtain Fig. 3.
Can intuitively it find out from Fig. 3, when measuring tank very little, P2Amplitude of variation is very in a relatively narrow range
Greatly, amplitude of variation very little and within the scope of other.And when measurement tank is very big, P2Amplitude of variation it is very steady, but entire
All very little in reference axis.It means that the precision of instrument is only very high in a lesser range when measuring tank very little, and
Maximum volume of the range close to loading tank；When measurement tank is very big, though the measurement range of instrument is wide, precision is unable to get
Guarantee.
In view of the portability of specific gravity instrument and its application scenarios are the measurement of a small number of objects mostly, loading tank is chosen
Volume is 2L.With measured object size, measurement tank size and open the air pressure P measured after solenoid valve2Make three-dimensional figure for variable, such as
Fig. 4.The general relationship of three as shown in Figure 4, and Slope relationship figure is drawn accordingly.
Fig. 5 is the P under different measurement tank volumes2With the slope figure of measured object volume change.Obviously, in a certain range
The corresponding volume of the maximum curve of the sum of slope is optimum measurement tank volume.
It can be obtained by Fig. 3, when measurement tank volume is 0.1L, when testee volume very little, slope is small, until testee
Volume is 1.8L or so, and slope rises suddenly and sharply.Obviously, volume be 0.1L measurement tank be not particularly suited for volume 1.8L once be tested
Object, but since it rises suddenly and sharply when being greater than 1.8L, average value at this time is still very big.In order to exclude such case to final result
Interference, the range that will sum is limited to 0.5L-1.8L the recommendation measurement range of the specific gravity instrument (while being also), acquires in this range
Optimum measurement tank volume is 0.48L, and slope figure is as shown in Figure 6.
It is referring to fig. 2 controling circuit structure block diagram of the present invention, controller uses single-chip microcontroller, connects gravity sensor, pressure
Sensor and temperature sensor control vent valve and solenoid valve, and control for receiving gravity, air pressure and temperature value
The operation of air pump.Single-chip microcontroller is used for the processing of data, program is built-in with, including the calculating to data.According to ideal gas behavior
Equation can use mathematical computations and show that measured object volume and the relationship of surveyed physical quantity are as follows:
P1×(V1-V0)=n1RT1
P0×(V1+V2-V0)=n3RT0
P2×(V1+V2-V0)=n4RT2
(n1-n0) × R=(n4-n3)×R
In formula,
V0For determinand volume
V1For loading tank volume
V2To measure tank (the second sealing space) volume
P0For two container initial gas pressures (can not be standard atmospheric pressure)
P1For the pressure after the completion of measurement tank (the second sealing space) inflation
P2Equilibrium pressure after being opened for solenoid valve
T0Whole system internal temperature when being initial
T1For the temperature after the completion of measurement tank (the second sealing space) inflation
T2To open internal system temperature after solenoid valve balance
n1For the mole after the completion of measurement tank (the second sealing space) inflation
n3Mole inside whole system when being initial
n4To open internal system mole after solenoid valve balance
R is ideal gas constant
Realize that the measurement of object volume obtains density value in conjunction with the value of gravity sensor by measuring above-mentioned physical quantity.
Measurement process: device is placed first.Determine loading tank (the first sealing space) and (the second sealing of measurement tank
Space) volume V1,V2。V1For loading tank volume, V2To measure tank volume, then testee is put into measurement tank body, really
Determine initial space gas pressure P0, and initial temperature T0, object is arrived by the change reflection of two process pressures of inflating and deflate
Volume takes the registration of gravity sensor, passes through single-chip microcontroller booster air pump using the gap that loading tank places front and back gravity sensor,
Measurement tank body is inflated.Air pressure P after measuring inflation after inflation is completed2, and the temperature T that measurement is later2。
The close of testee is directly displayed by internal calculation using above-mentioned its equation of ideal gas behavior formula for PV=nRT
Degree.
The present invention also provides a kind of specific gravity test method,
First sealing space is set, testee is put into, measures the weight of testee；
Second sealing space is set, is separated between first sealing space by solenoid valve,
Solenoid valve is opened, so that the first sealing space is identical as the second sealing space air pressure, measures initial space air pressure P0,
With initial temperature T0；
Close solenoid valve；
It is inflated in toward the first sealing space, the air pressure P in the first sealing space is measured after inflation1, temperature after inflation
Spend T1；
It opens solenoid valve and makes the first sealing space and the second sealing space internal temperature and air pressure balance；
Air pressure P after measurement balance2, temperature T after inflation2；
Measured object volume and density are calculated in conjunction with the gravity value that gravity sensor measures according to measured parameter
The density of measured object is calculated.
The present invention passes through to tainer air density, the quality of object being measured, the physical factors such as tainer air temperature
Acquisition, while assisting the observational measurement to ambient outside factor.By being put into related physical quantity before and after object being measured to getting
It is effective identification and record, judge operating status locating for specific gravity instrument, by single-chip microcontroller complete assigned tasks data processing simultaneously
Export result.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (7)
1. a kind of portable specific gravity instrument based on air pressure measurement, which is characterized in that
Including the first sealing space, for being put into testee, be arranged in first sealing space gravity sensor with
And vent valve；
Connection is by solenoid valve control between second sealing space, with first sealing space, in second sealing space
Air pump is inside provided with to inflate to second sealing space；
Temperature sensor is arranged in second sealing space, for measuring the temperature before and after pressure change；
Pressure sensor is arranged in second sealing space, for measuring pressure；
Controller measures timing for controlling, and receives temperature, pressure and gravimetric data and handle.
2. specific gravity instrument described in accordance with the claim 1, which is characterized in that first sealing space is the load that one is cylindrical body
Object tank, gravity sensor are placed in the bottom of loading tank.
3. specific gravity instrument described in accordance with the claim 1, which is characterized in that the volume of first sealing space is 2L.
4. specific gravity instrument described in accordance with the claim 1, which is characterized in that the volume of second sealing space is 0.48L.
5. a kind of specific gravity test method, which is characterized in that
First sealing space is set, testee is put into, measures the weight of testee；
Second sealing space is set, is separated between first sealing space by solenoid valve,
Solenoid valve is opened, so that the first sealing space is identical as the second sealing space air pressure, measures initial space air pressure P0, and just
Beginning temperature T0；
Close solenoid valve；
It is inflated in toward the first sealing space, the air pressure P in the first sealing space is measured after inflation1, temperature T after inflation1；
It opens solenoid valve and makes the first sealing space and the second sealing space internal temperature and air pressure balance；
Air pressure P after measurement balance2, temperature T after inflation2；
Measured object volume and density are calculated according to measured parameter.
6. specific gravity test method according to claim 5, which is characterized in that the volume of first sealing space is 2L.
7. specific gravity instrument according to claim 5, which is characterized in that the volume of second sealing space is 0.48L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621088.3A CN109856007A (en) | 2018-12-28 | 2018-12-28 | Portable specific gravity instrument and specific gravity test method based on air pressure measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811621088.3A CN109856007A (en) | 2018-12-28 | 2018-12-28 | Portable specific gravity instrument and specific gravity test method based on air pressure measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109856007A true CN109856007A (en) | 2019-06-07 |
Family
ID=66892811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811621088.3A Pending CN109856007A (en) | 2018-12-28 | 2018-12-28 | Portable specific gravity instrument and specific gravity test method based on air pressure measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109856007A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440867A (en) * | 2019-08-21 | 2019-11-12 | 许昌学院 | Irregular solid particle air pressure co-volume and density measuring equipment and its application method |
| CN113433031A (en) * | 2021-05-27 | 2021-09-24 | 浙江工业大学之江学院 | Method for measuring solid volume density |
| CN115728179A (en) * | 2022-11-30 | 2023-03-03 | 深圳中恒检测技术有限公司 | Gas metering device for chemistry experiments |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020117002A1 (en) * | 2001-02-14 | 2002-08-29 | Sakujiro Ueno | Specific gravity measuring device |
| CN2735332Y (en) * | 2004-05-14 | 2005-10-19 | 周郑 | Liquid-free density and volume meter |
| CN201083667Y (en) * | 2007-09-24 | 2008-07-09 | 浙江林学院 | Porous material density measurement apparatus |
| CN103994798A (en) * | 2014-05-23 | 2014-08-20 | 包头市太阳满都拉电缆有限公司 | Air-pressure method volume measurement device and an air-pressure method density measurement method |
| CN104237066A (en) * | 2014-09-26 | 2014-12-24 | 哈尔滨东安发动机（集团）有限公司 | Method for measuring density of object |
| CN104748813A (en) * | 2015-03-27 | 2015-07-01 | 南京光锥信息科技有限公司 | Rigid object volume measuring instrument and method based on ideal gas state equation |
| CN104807720A (en) * | 2015-05-20 | 2015-07-29 | 闫语童 | Method for measuring object density based on air pressure process |
-
2018
- 2018-12-28 CN CN201811621088.3A patent/CN109856007A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020117002A1 (en) * | 2001-02-14 | 2002-08-29 | Sakujiro Ueno | Specific gravity measuring device |
| CN2735332Y (en) * | 2004-05-14 | 2005-10-19 | 周郑 | Liquid-free density and volume meter |
| CN201083667Y (en) * | 2007-09-24 | 2008-07-09 | 浙江林学院 | Porous material density measurement apparatus |
| CN103994798A (en) * | 2014-05-23 | 2014-08-20 | 包头市太阳满都拉电缆有限公司 | Air-pressure method volume measurement device and an air-pressure method density measurement method |
| CN104237066A (en) * | 2014-09-26 | 2014-12-24 | 哈尔滨东安发动机（集团）有限公司 | Method for measuring density of object |
| CN104748813A (en) * | 2015-03-27 | 2015-07-01 | 南京光锥信息科技有限公司 | Rigid object volume measuring instrument and method based on ideal gas state equation |
| CN104807720A (en) * | 2015-05-20 | 2015-07-29 | 闫语童 | Method for measuring object density based on air pressure process |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440867A (en) * | 2019-08-21 | 2019-11-12 | 许昌学院 | Irregular solid particle air pressure co-volume and density measuring equipment and its application method |
| CN113433031A (en) * | 2021-05-27 | 2021-09-24 | 浙江工业大学之江学院 | Method for measuring solid volume density |
| CN115728179A (en) * | 2022-11-30 | 2023-03-03 | 深圳中恒检测技术有限公司 | Gas metering device for chemistry experiments |
| CN115728179B (en) * | 2022-11-30 | 2024-05-17 | 深圳中恒检测技术有限公司 | Gas metering device for chemistry experiments |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109856007A (en) | Portable specific gravity instrument and specific gravity test method based on air pressure measurement | |
| CN103424421B (en) | A kind of method adopting low-field nuclear magnetic resonance to carry out coal sample methane adsorption measurement amount | |
| CN107202811B (en) | It is a kind of while measuring ADSORPTION STATE and the measuring method of free state methane in shale | |
| Jablin et al. | In-Plane Correlations in a Polymer-Supported Lipid Membrane Measured<? format?> by Off-Specular Neutron Scattering | |
| CN206057126U (en) | A kind of shale multi component adsorption experimental provision | |
| CN203785731U (en) | Device for measuring volume of irregular enclosed container | |
| CN103076054B (en) | A kind of method measuring minimum gas | |
| CN108593697A (en) | A kind of method and apparatus measuring Coal Under High Pressure wetability using low-field nuclear magnetic resonance | |
| WO2003033113A2 (en) | Fuel gauge for hydrogen storage media | |
| CN207991970U (en) | Grain heap compressive deformation and grain heap-bulkhead interfacial pressure test device | |
| CN104501899A (en) | Device and method for precise measurement of volume and density of object | |
| CN108414364A (en) | A kind of grain heap test device and the method using device measurement grain heap compressive deformation and grain heap interfacial pressure | |
| CN101470016A (en) | Apparatus for measuring volume by built-in method | |
| CN107907179A (en) | A kind of arbitrary shaped body volume measuring instrument | |
| CN105115559A (en) | Container volume measurement device and measurement method based on secondary micro-variation allowance pressure principles | |
| CN104729974B (en) | A kind of gas gaging hole porosity measuring method for considering temperature effect | |
| CN104713894B (en) | Nuclear-magnetism high pressure isothermal adsorption device | |
| CN101566547B (en) | Buoyancy method for rapidly measuring grain moisture and tester thereof | |
| CN206321534U (en) | A kind of device of quick accurate measurement gas density | |
| CN201060148Y (en) | Daqu volume weight measuring apparatus | |
| CN113624654A (en) | Rock porosity measuring device and method | |
| CN206281739U (en) | A kind of novel intelligent penetron | |
| CN209636774U (en) | A kind of great burying soil HYDRODYNAMIC CHARACTERISTICS parameter measuring apparatus | |
| CN107202743A (en) | A kind of Multi-example Static Adsorption test device and its method of testing | |
| CN107576590A (en) | The volumetric method accessory system and absorption measuring method of a kind of low-field nuclear magnetic resonance isothermal adsorption test |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190607 |