CN104237068A - Negative pressure type device for measuring density of object - Google Patents
Negative pressure type device for measuring density of object Download PDFInfo
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- CN104237068A CN104237068A CN201410503076.6A CN201410503076A CN104237068A CN 104237068 A CN104237068 A CN 104237068A CN 201410503076 A CN201410503076 A CN 201410503076A CN 104237068 A CN104237068 A CN 104237068A
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- cylinder body
- temperature sensor
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- density
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Abstract
The invention relates to a negative pressure type device for measuring the density of an object. The negative pressure type device comprises a cylinder, a weighing table, a piston, a pressure sensor, a measured object temperature sensor and a gas temperature sensor, wherein the cylinder is placed on the weighing table; a piston capable of moving up and down is arranged at the top of the cylinder body; the pressure sensor, the gas temperature sensor and the measured object temperature sensor are arranged in the cylinder body and are communicated to the outside of the cylinder body; a tension device is arranged on the piston. The negative pressure type device for measuring the density of the object realizes measurement on the densities of objects with different states, different shapes and different characteristics under different temperatures according to the density measurement principle and based on the Clapeyron equation of ideal gas, and has the characteristics of scientific principle, simple structure, high easiness in operation and accurate result.
Description
Technical field
The present invention relates to a kind of device of density measurement, especially a kind of suction type measures the device of object density.
Background technology
In scientific research and engineering practice, density parameter is the important parameter in engineering calculation simulation process and scientific research experimentation.It is as important material property parameter, very large for physics and chemistry process influences such as heat transfer, mass transfer and MOMENTUM TRANSMISSION.In the measuring method of density parameter, usually when testee is solid, adopt fluid-discharge therapy more, but cannot be suitable for the material of fluid-sensitive some; When testee mostly is fluid, powdered substance, regular shape can be constrained to it, calculate volume by liquid level sensor detecting, but cannot be measured by existing apparatus some erose solids.Meanwhile, these technical schemes, only can provide the density value of the corresponding a certain temperature of testee, cannot provide the density value of testee under different temperatures change condition.For this situation, propose and testee is put into airtight container, by the change of container internal pressure, temperature and volume, utilize the Clapyron Equation of ideal gas to draw the relation of different temperatures, pressure and volume: P
1(V
1-V
survey)/T
1=P
2(V
2-V
survey) V
2/ T
2, draw the volume of testee, and then realize the measurement of density.Because air itself is not easily liquefied, and when temperature higher than room temperature, when pressure is not more than 1 atmospheric pressure, with ideal gas closely, can ideal gas be thought, go for Clapyron Equation.Therefore need to design a set of measurement mechanism, the function such as the change of pressure, the measurement of parameter can be realized, to realize above-mentioned measuring method.
Summary of the invention
The object of this invention is to provide the device that a kind of suction type measures object density, there is the functions such as pressure change, parameter measurement, measure while accurate science can be realized the density of object.
Technical scheme of the present invention is, the device that described suction type measures object density comprises cylinder body, weighing unit, piston, pressure transducer, testee temperature sensor, gas temperature sensor, cylinder body is placed on weighing unit, cylinder body top is provided with piston moving up and down, and cylinder body is closed by described piston; Be provided with pressure transducer, gas temperature sensor and testee temperature sensor in cylinder body and be communicated to cylinder body outside, described pressure transducer, gas temperature sensor are exposed in the air in cylinder body, testee temperature sensor contacts with testee or imbeds testee inside, and piston is provided with puller system.Also be provided with the banking stop stoping piston to move down in described cylinder body, cylinder body is circular, and material is high temperature resistant material, as high temperature stainless steel.Cylinder body is provided with vent hole.The open-top receptacle of splendid attire testee is provided with in cylinder body.
The present invention by being provided with piston on cylinder body, form the space of sealing, testee is placed in cylinder body, pass through mobile piston, inner gaseous tension, volume, temperature etc. are changed, and measure pressure and temperature by pressure transducer, gas temperature sensor, draw volume by the move distance of piston.Meanwhile, piston arranges puller system, all adopt pulling force in the course of work, air ambient is negative pressure, and pressure is less than atmospheric pressure, therefore measures the result obtained, and can ensure required measuring accuracy.Cylinder body is high temperature resistant material, and so the temperature of testee within the scope of (20-1000) DEG C, and when testee temperature is higher, can produces heat effect to the air in closed container, cause T
1and T
2remarkable rising, air now closer to ideal gas, can be conducive to the measuring accuracy improving density values.Meanwhile, when constantly changing measured object temperature, the density value under object different temperatures can be drawn, thus obtain the temperature curve of density.The present invention is according to density measure principle, by the Clapyron Equation of ideal gas, achieve the measurement of the object density at different temperatures different for state, shape is different, characteristic is different, have that scientific in principle, structure are simple, processing ease, result is feature accurately.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
As shown in the figure, the device that suction type measures object density comprises cylinder body 5, weighing unit 1, piston 7, pressure transducer 4, testee temperature sensor 12, gas temperature sensor 8, cylinder body 5 is placed on weighing unit 1, cylinder body 5 top is provided with piston 7 moving up and down, and cylinder body 5 is closed by described piston 7; Be provided with pressure transducer 4, gas temperature sensor 8 and testee temperature sensor 12 in cylinder body 5 and be communicated to cylinder body 5 outside, described pressure transducer 4, gas temperature sensor 8 are exposed in the air in cylinder body 5, it is inner that testee temperature sensor 12 and testee 13 contact or imbed testee 13, and piston 7 is provided with puller system.Also be provided with the banking stop 6 stoping piston 7 to move down in described cylinder body 5, cylinder body 5 is circular, and material is high temperature resistant material, as high temperature stainless steel.Cylinder body 5 is provided with vent hole 2.The open-top receptacle 10 of splendid attire testee 13 is provided with in cylinder body 5.
Claims (6)
1. the device of a suction type measurement object density, it is characterized in that, described device comprises cylinder body (5), weighing unit (1), piston (7), pressure transducer (4), testee temperature sensor (12), gas temperature sensor (8), cylinder body (5) is placed on weighing unit (1), cylinder body (5) top is provided with piston moving up and down (7), and cylinder body (5) is closed by described piston (7); Be provided with pressure transducer (4), gas temperature sensor (8) and testee temperature sensor (12) in cylinder body (5) and be communicated to cylinder body (5) outside, described pressure transducer (4), gas temperature sensor (8) are exposed in the air in cylinder body (5), it is inner that testee temperature sensor (12) and testee (13) contact or imbed testee (13), and (7) are provided with puller system to piston.
2. suction type as claimed in claim 1 measures the device of object density, it is characterized in that, is also provided with the banking stop (6) stoping piston (7) to move down in described cylinder body 5.
3. suction type as claimed in claim 1 measures the device of object density, it is characterized in that, described cylinder body (5) is circular, and material is high temperature resistant material.
4. suction type as claimed in claim 3 measures the device of object density, and it is characterized in that, the material of described cylinder body (5) is high temperature stainless steel.
5. suction type as claimed in claim 1 measures the device of object density, it is characterized in that, described cylinder body (5) is provided with vent hole (2).
6. suction type as claimed in claim 1 measures the device of object density, it is characterized in that, is provided with the open-top receptacle (10) of splendid attire testee (13) in described cylinder body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410503076.6A CN104237068A (en) | 2014-09-26 | 2014-09-26 | Negative pressure type device for measuring density of object |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410503076.6A CN104237068A (en) | 2014-09-26 | 2014-09-26 | Negative pressure type device for measuring density of object |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104237068A true CN104237068A (en) | 2014-12-24 |
Family
ID=52225581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410503076.6A Pending CN104237068A (en) | 2014-09-26 | 2014-09-26 | Negative pressure type device for measuring density of object |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104237068A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028986A (en) * | 2021-03-03 | 2021-06-25 | 北京科技大学 | Volume measuring device and mass measuring system |
| CN117870619A (en) * | 2024-03-12 | 2024-04-12 | 云奕智创航空科技(南通)有限公司 | Air pressure height detection device and unmanned aerial vehicle |
-
2014
- 2014-09-26 CN CN201410503076.6A patent/CN104237068A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028986A (en) * | 2021-03-03 | 2021-06-25 | 北京科技大学 | Volume measuring device and mass measuring system |
| CN117870619A (en) * | 2024-03-12 | 2024-04-12 | 云奕智创航空科技(南通)有限公司 | Air pressure height detection device and unmanned aerial vehicle |
| CN117870619B (en) * | 2024-03-12 | 2024-05-24 | 云奕智创航空科技(南通)有限公司 | Air pressure height detection device and unmanned aerial vehicle |
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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: 20141224 |