CN103344523A - Liquid density real-time measurement method - Google Patents
Liquid density real-time measurement method Download PDFInfo
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- CN103344523A CN103344523A CN2013102711516A CN201310271151A CN103344523A CN 103344523 A CN103344523 A CN 103344523A CN 2013102711516 A CN2013102711516 A CN 2013102711516A CN 201310271151 A CN201310271151 A CN 201310271151A CN 103344523 A CN103344523 A CN 103344523A
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- 239000007787 solid Substances 0.000 claims abstract description 27
- 238000005259 measurement Methods 0.000 claims abstract description 8
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Abstract
一种液体密度实时测量方法,它能准确、快速的测量各种液体的密度,并能进行远距离实时测量与传输,其方法是,步骤1:准备一不溶于待测液体、其密度大于待测液体密度的固体;步骤2:细线的一端系住该固体,细线的另一端固定在力敏传感器上,并将该固体浸没于一已知密度为ρ 0的液体中,但不与盛液体的容器相接触;步骤3:将力敏传感器输出的电信号通过放大器放大,由二次仪表读数或直接通过A/D转换,由微机进行数据采集和显示,调节放大器放大倍数,使仪表直接显示为已知密度ρ 0值;步骤4:将固体浸没于待测液体中,但不与盛液体的容器相接触,则仪表直接显示待测液体的密度ρ x值。A liquid density real-time measurement method, which can accurately and quickly measure the density of various liquids, and can perform long-distance real-time measurement and transmission. A solid for measuring liquid density; Step 2: One end of the thin wire is tied to the solid, the other end of the thin wire is fixed on the force-sensitive sensor, and the solid is immersed in a liquid with a known density of ρ0 , but not with The container holding the liquid is in contact with each other; Step 3: Amplify the electrical signal output by the force-sensitive sensor through the amplifier, read it from the secondary instrument or directly convert it through A/D, collect and display the data by the computer, adjust the magnification of the amplifier, and make the instrument It is directly displayed as the known density ρ 0 value; Step 4: Submerge the solid in the liquid to be tested, but not in contact with the container holding the liquid, the meter will directly display the density ρ x value of the liquid to be tested.
Description
所属技术领域 Technical field
本发明涉及一种液体密度实时测量方法,主要应用于大、中专院校实验教学。 The invention relates to a real-time measurement method for liquid density, which is mainly used in experimental teaching in universities and technical secondary schools.
背景技术 Background technique
密度是物质的一个物理参数,常见的液体密度测量方法有:常规法、密度瓶法、密度计法、浮力法、浮体法等,这些方法都存在测量精度不高、测量繁杂的缺点,尤其是不能进行远距离测量与传输。 Density is a physical parameter of matter. The common liquid density measurement methods include: conventional method, density bottle method, densitometer method, buoyancy method, floating body method, etc. These methods have the disadvantages of low measurement accuracy and complicated measurement, especially Long-distance measurement and transmission cannot be performed.
发明内容 Contents of the invention
为了克服上述现有技术的不足,本发明提供一种液体密度实时测量方法,它能准确、快速的测量各种液体的密度,并能进行远距离实时测量与传输。 In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a liquid density real-time measurement method, which can accurately and quickly measure the density of various liquids, and can perform long-distance real-time measurement and transmission.
本发明解决其技术问题所采用的技术方案是,步骤1:准备一体积为ν、不溶于待测液体、其密度大于待测液体密度、质量为m的固体;步骤2:细线的一端系住体积为ν、质量为m的固体,细线的另一端固定在力敏传感器上,并将该固体浸没于一已知密度为ρ 0的液体中,但不与盛液体的容器相接触,根据阿基米德原理,浸没于已知密度为ρ 0液体中的固体,其所受浮力等于其所排开的相同体积的液体的重量,即: ,其中v为固体的体积,显然,悬挂物体的细线的张力为: ,因此,液体密度的变化将引起细线中张力的变化;步骤3:将力敏传感器输出的电信号通过放大器放大,由二次仪表读数或直接通过A/D转换,由微机进行数据采集和显示,因此,待测液体密度可通过仪表直接显示,调节放大器放大倍数,使仪表直接显示为已知密度ρ 0值;步骤4:将固体浸没于待测液体中,但不与盛液体的容器相接触,则仪表直接显示待测液体的密度ρ x值。 The technical scheme that the present invention adopts to solve its technical problem is, step 1: prepare a solid that volume is ν, insoluble in the liquid to be measured, its density is greater than the density of the liquid to be measured, and mass is m; Step 2: one end of thin line is To hold a solid with a volume of ν and a mass of m, the other end of the thin wire is fixed on the force-sensitive sensor, and the solid is immersed in a liquid with a known density of ρ0 , but not in contact with the container containing the liquid, According to Archimedes' principle, the buoyant force on a solid submerged in a liquid of known density ρ0 is equal to the weight of the same volume of liquid it displaces, namely: , where v is the volume of the solid, obviously, the tension of the thin wire hanging the object is: , therefore, the change of liquid density will cause the change of tension in the thin wire; Step 3: the electrical signal output by the force sensitive sensor is amplified by the amplifier, read by the secondary instrument or directly through A/D conversion, and the data is collected and processed by the microcomputer Display, therefore, the density of the liquid to be measured can be directly displayed by the meter, adjust the magnification of the amplifier, so that the meter can directly display the known density ρ0 value; Step 4: Immerse the solid in the liquid to be measured, but not with the container containing the liquid If they are in contact with each other, the meter will directly display the density ρx value of the liquid to be measured.
本发明的有益效果是:细线的一端系住一不溶于待测液体、其密度大于待测液体密度的固体,细线的另一端固定在力敏传感器上,先将该固体浸没于一已知密度为ρ 0的液体中,将力敏传感器输出的电信号通过放大器放大,调节放大器放大倍数,使仪表直接显示为已知密度ρ 0值,再将该固体浸没于待测液体中,但不与盛液体的容器相接触,则仪表直接显示待测液体的密度ρ x值,此发明方法简单、方便、快速、测量精度高,并能进行远距离实时测量与传输。 The beneficial effects of the present invention are: one end of the thin wire is tied to a solid which is insoluble in the liquid to be tested and its density is greater than the density of the liquid to be tested, the other end of the thin wire is fixed on the force sensitive sensor, and the solid is immersed in an already In the liquid with a known density of ρ0 , the electrical signal output by the force sensor is amplified by the amplifier, and the magnification of the amplifier is adjusted so that the meter directly displays the value of the known density ρ0 , and then the solid is immersed in the liquid to be tested, but Without contact with the container containing the liquid, the instrument directly displays the density ρx value of the liquid to be measured. The inventive method is simple, convenient, fast, has high measurement accuracy, and can perform long- distance real-time measurement and transmission.
具体实施方式 Detailed ways
下面结合具体实施例对本发明作进一步说明。 The present invention will be further described below in conjunction with specific examples.
本发明实施例1步骤: Embodiment 1 step of the present invention:
a、准备一不溶于待测液体、其密度大于待测液体密度的固体; a. Prepare a solid that is insoluble in the liquid to be tested and whose density is greater than that of the liquid to be tested;
b、细线的一端系住上述固体,细线的另一端固定在力敏传感器上,并将该固体浸没于水中,但不与盛水的容器相接触,将力敏传感器输出的电信号通过放大器放大,调节放大器放大倍数,使仪表直接显示为水的密度ρ 0值; b. One end of the thin wire is tied to the above-mentioned solid, and the other end of the thin wire is fixed on the force-sensitive sensor, and the solid is immersed in water, but not in contact with the water container, and the electrical signal output by the force-sensitive sensor passes through The amplifier is amplified, adjust the magnification of the amplifier, so that the meter directly displays the value of water density ρ0 ;
c、细线的一端系住上述固体,细线的另一端固定在力敏传感器上,并将该固体浸没于待测液体中,但不与盛液体的容器相接触,仪表直接显示的值即为待测液体的密度ρ x值。 c. One end of the thin wire is tied to the above-mentioned solid, the other end of the thin wire is fixed on the force-sensitive sensor, and the solid is immersed in the liquid to be tested, but not in contact with the container containing the liquid, the value directly displayed by the meter is is the density ρ x value of the liquid to be tested.
本发明实施例2步骤: Embodiment 2 steps of the present invention:
a、准备一不溶于待测液体、其密度大于待测液体密度的固体; a. Prepare a solid that is insoluble in the liquid to be tested and whose density is greater than that of the liquid to be tested;
b、细线的一端系住上述固体,细线的另一端固定在力敏传感器上,并将该固体浸没于水中,但不与盛水的容器相接触,将力敏传感器输出的电信号通过A/D转换,由微机进行数据采集和显示水的密度ρ 0值; b. One end of the thin wire is tied to the above-mentioned solid, and the other end of the thin wire is fixed on the force-sensitive sensor, and the solid is immersed in water, but not in contact with the water container, and the electrical signal output by the force-sensitive sensor passes through A/D conversion, data acquisition and display of water density ρ0 value by microcomputer;
c、细线的一端系住上述固体,细线的另一端固定在力敏传感器上,并将该固体浸没于待测液体中,但不与盛液体的容器相接触,将力敏传感器输出的电信号通过A/D转换,由微机进行数据采集和显示待测液体的密度ρ x值。 c. One end of the thin wire is tied to the above-mentioned solid, the other end of the thin wire is fixed on the force-sensitive sensor, and the solid is immersed in the liquid to be tested, but not in contact with the container containing the liquid, and the output of the force-sensitive sensor is The electrical signal is converted by A/D, and the data is collected and displayed by the computer to display the density ρx value of the liquid to be measured.
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105067481A (en) * | 2015-07-09 | 2015-11-18 | 浙江蓝箭称重技术有限公司 | Digital mud specific gravity tester and testing method |
CN105588784A (en) * | 2014-10-23 | 2016-05-18 | 北京纳米能源与系统研究所 | A continuous measurement device for liquid densities |
CN105606459A (en) * | 2016-02-04 | 2016-05-25 | 香港城市大学深圳研究院 | In-situ torque testing device for micro-nano scale materials and observing device |
CN107036934A (en) * | 2017-04-27 | 2017-08-11 | 华电电力科学研究院 | A kind of oil product air release value determines device and method |
CN108627422A (en) * | 2018-06-05 | 2018-10-09 | 江苏海基新能源股份有限公司 | A kind of multi-functional density measurement device and application |
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CN2216247Y (en) * | 1992-09-10 | 1995-12-27 | 杜安棣 | Liquid specific gravity real time measurer |
JPH08271398A (en) * | 1995-03-30 | 1996-10-18 | Kosei Koki:Kk | Specific gravity measuring method for liquid material using load cell |
CN2325772Y (en) * | 1997-04-25 | 1999-06-23 | 赵万山 | Digital displaying type instrument for investigating density |
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CN2080175U (en) * | 1990-09-22 | 1991-07-03 | 冶金工业部钢铁研究总院 | Subsidiary device of electronic scale density measuring |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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CN105588784A (en) * | 2014-10-23 | 2016-05-18 | 北京纳米能源与系统研究所 | A continuous measurement device for liquid densities |
CN105067481A (en) * | 2015-07-09 | 2015-11-18 | 浙江蓝箭称重技术有限公司 | Digital mud specific gravity tester and testing method |
CN105067481B (en) * | 2015-07-09 | 2017-12-29 | 浙江蓝箭称重技术有限公司 | Digital mud balance tester and method of testing |
CN105606459A (en) * | 2016-02-04 | 2016-05-25 | 香港城市大学深圳研究院 | In-situ torque testing device for micro-nano scale materials and observing device |
CN105606459B (en) * | 2016-02-04 | 2018-07-13 | 香港城市大学深圳研究院 | Torsion-testing apparatus in situ and observation device for micro/nano-scale material |
CN107036934A (en) * | 2017-04-27 | 2017-08-11 | 华电电力科学研究院 | A kind of oil product air release value determines device and method |
CN108627422A (en) * | 2018-06-05 | 2018-10-09 | 江苏海基新能源股份有限公司 | A kind of multi-functional density measurement device and application |
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