WO2014081087A1 - 액체의 액면 높이 및 비중을 동시에 측정하는 장치 - Google Patents

액체의 액면 높이 및 비중을 동시에 측정하는 장치 Download PDF

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Publication number
WO2014081087A1
WO2014081087A1 PCT/KR2013/002457 KR2013002457W WO2014081087A1 WO 2014081087 A1 WO2014081087 A1 WO 2014081087A1 KR 2013002457 W KR2013002457 W KR 2013002457W WO 2014081087 A1 WO2014081087 A1 WO 2014081087A1
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WO
WIPO (PCT)
Prior art keywords
specific gravity
buoy
liquid level
measurement buoy
liquid
Prior art date
Application number
PCT/KR2013/002457
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English (en)
French (fr)
Korean (ko)
Inventor
백영주
탁남규
Original Assignee
(주) 다인레벨
Priority date (The priority date 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 date listed.)
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Application filed by (주) 다인레벨 filed Critical (주) 다인레벨
Priority to JP2015543948A priority Critical patent/JP6013618B2/ja
Priority to CN201390000926.XU priority patent/CN204963890U/zh
Publication of WO2014081087A1 publication Critical patent/WO2014081087A1/ko

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/56—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements
    • G01F23/62—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats using elements rigidly fixed to, and rectilinearly moving with, the floats as transmission elements using magnetically actuated indicating means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
    • G01N9/10—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials
    • G01N9/12—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials by observing the depth of immersion of the bodies, e.g. hydrometers

Definitions

  • the present invention relates to a device for measuring the liquid level and specific gravity of the liquid at the same time by magnetic field distortion method, more specifically, it can be applied to an oil tank with a small opening by making the outer diameter within 50mm and between the buoy and the probe shaft
  • the present invention relates to a device for simultaneously measuring the liquid level and specific gravity of a liquid having improved precision by minimizing surface tension.
  • a device for measuring the liquid level inside the tank such as an oil tank, to obtain a flow rate is called a tank level gauge.
  • the tank level gauge TMG
  • the magnetic field distortion method using the magnetostriction phenomenon is most widely used.
  • Magnetostriction is a phenomenon in which elastic deformation occurs due to the change in the length of a material due to the alignment of molecular structures when a magnetic field is applied to a magnetic material.
  • Liquid level measurement device using magnetostriction usually generates a permanent magnetic field in the floater floating on the water on the magnetostriction to generate an axial magnetic field, and applies a pulse to the magnetostriction Generate a circumferential magnetic field. Then, magnetic field distortion occurs by synthesizing the axial and circumferential magnetic fields, and since this is a kind of mechanical vibration, elastic waves propagate along the magnetostriction.
  • the tank level gauge calculates the position of the permanent magnet (ie, the liquid level) by measuring the time until the ultrasonic wave is applied after applying a pulse to the magnetostriction line.
  • liquid level and density measuring device As a technique for measuring the liquid level and specific gravity at the same time in the liquid storage tank is known "liquid level and density measuring device" published in Patent Publication No. 10-2008-0090539.
  • the liquid level and density measuring device is, as shown in Figure 1, the liquid density measurement buoy 10 is manufactured in the form of a cylinder having a cavity (cavity), the level measurement buoy 20 is inserted into the hollow probe Consists of a structure fitted to the shaft (30).
  • the density measurement buoy of the structure has a surface buoy for removing the surface tension and the coefficient of friction of the liquid generated when the buoy for liquid level and the buoy for specific gravity are in close proximity or contact with each other.
  • the spacing of "d1" should be sufficiently maintained so that the and buoyancy buoys do not come into contact with each other, and the area "d2" in contact with the probe shaft 30 at the lower end of the buoyancy buoy should be long enough. If the interval of d1 is narrow or the length of d2 is short, the liquid level measurement buoy 20 and the specific gravity buoy 20 are in contact with each other as shown in FIG. Measurement errors appear under the influence of tension and coefficient of friction.
  • the liquid level measurement buoy 20 and the specific gravity measurement buoy 10 In order to eliminate the surface tension and the coefficient of friction of the liquid generated when the liquid level measurement buoy 20 and the specific gravity measurement buoy 10 are in close proximity or contact with each other, the liquid level measurement buoy 20 and the specific gravity measurement buoy ( There is a problem that the outer diameter of the device disclosed in No. 10-2008-0090539 cannot be made within 50 mm because 10) must be floated enough not to touch each other.
  • the pipe size of the opening opened in the manhole located at the top of the liquid storage tank used in gas stations is customarily established in the US and Europe as a pipe size of 100A (105mm inside diameter), but in the Asian region including Korea, the pipe size is 50A ( Inner diameter 54mm) or pipe size 40A (inner diameter 42mm) is open to use in oil tanks in South Korea or the East, there is a problem that needs to expand the opening.
  • the buoy 40 for measurement fitted to the probe shaft 30 is in close proximity or contact with the probe shaft 30 and the buoy 40 so that the surface tension acts on the surface of the liquid. Even though the buoy floating above the water level is lowered, there is a problem that the measurement does not fall as much as the water level is lowered. Referring to FIG. 3, when the water level is h1 and the height of the buoy 40 floating on the liquid is d1, even if the water level is lowered to h2, the buoy 40 does not go down as much as the water level is lowered and d2 is larger than d1. The surface tension acts as much as "d2-d1".
  • the present invention has been proposed to solve the above problems, and an object of the present invention is to make the outer diameter within 50mm and can be applied to oil tanks with small openings without additional construction, and the surface between the buoy and the probe shaft. To provide a device for simultaneously measuring the liquid level and specific gravity of the liquid to minimize the tension.
  • another object of the present invention is to make the specific gravity measurement buoy made in the form of a core to make the thickness of the outer diameter-inner diameter thin so as to react sensitively to the change in specific gravity of the liquid, and the buoyancy measurement buoy thicker than the buoyancy measurement buoy
  • the present invention provides a device for simultaneously measuring the liquid level and specific gravity of a liquid having improved accuracy by making the difference in sensitivity more than three times by being insensitive to change in specific gravity of the liquid.
  • the apparatus of the present invention is capable of measuring the liquid level and specific gravity using magnetic field distortion after applying a pulse to the probe shaft penetrating the liquid level measurement buoy and the specific gravity measurement buoy.
  • the liquid level height measurement buoy is formed in the center and the cylindrical body formed in the upper edge on the inside;
  • An upper guide fixed to an upper portion of the cylindrical body to prevent surface tension between the buoyancy buoy and the probe shaft;
  • a lower guide fixed to the lower portion of the cylindrical body to prevent surface tension between the liquid level measurement buoy and the specific gravity measurement buoy.
  • the specific gravity measurement buoy, the upper cylinder and the lower cylinder is formed integrally, the outer diameter of the lower cylinder is larger than the outer diameter of the upper cylinder, the length of the upper cylinder is longer than the length of the lower cylinder;
  • An upper guide fixed to an upper portion of the columnar body to prevent surface tension between the specific gravity measurement buoy and the probe shaft;
  • a lower guide fixed to the lower portion of the cylindrical body to prevent surface tension between the buoyancy measurement buoy and the probe shaft;
  • a magnet for specific gravity measurement which is fixed to the specific gravity measuring buoy to indicate a position.
  • the specific gravity measurement buoy may further include a weight attached to the cylindrical body to adjust the buoyancy of the specific gravity measurement buoy, and the upper guide and the lower guide of the liquid level measurement buoy or the specific gravity measurement buoy. Is an aluminum leaf shape and minimizes the area where the guide contacts the probe shaft.
  • the device after applying a pulse to the probe shaft penetrating the liquid level measurement buoy and specific gravity measurement buoy to measure the liquid level and specific gravity using magnetic field distortion.
  • the liquid level and specific gravity measuring device after applying a pulse to the probe shaft penetrating the liquid level measurement buoy and specific gravity measurement buoy to measure the liquid level and specific gravity using magnetic field distortion.
  • the liquid level height measurement buoy is formed in the center and the cylindrical body formed in the upper edge on the inside;
  • An upper guide fixed to an upper portion of the cylindrical body to prevent surface tension between the buoyancy buoy and the probe shaft;
  • a lower guide fixed to the lower portion of the cylindrical body to prevent surface tension between the liquid level measurement buoy and the specific gravity measurement buoy.
  • the specific gravity measurement buoy, the upper cylinder and the lower cylinder is formed integrally, the outer diameter of the lower cylinder is larger than the outer diameter of the upper cylinder, the length of the upper cylinder is longer than the length of the lower cylinder;
  • An upper guide fixed to an upper portion of the columnar body to prevent surface tension between the specific gravity measurement buoy and the probe shaft;
  • a lower guide fixed to the lower portion of the cylindrical body to prevent surface tension between the buoyancy measurement buoy and the probe shaft;
  • a magnet for specific gravity measurement which is fixed to the specific gravity measuring buoy to indicate a position.
  • the thickness of the liquid level measurement buoy is characterized in that more than three times thicker than the thickness of the specific gravity measurement buoy.
  • the liquid level and specific gravity measuring device is inserted into the opening opened in the manhole located in the upper part of the liquid storage tank and mounted to penetrate into the tank.
  • the device according to the present invention is designed to have an outer diameter of 50 mm or less by a unique structure. When installed in the pipe standard 50A (54 mm inner diameter) of the widely used openings can be easily installed without additional opening expansion work, there is an effect that can reduce the installation cost.
  • the conventional specific gravity measuring device has a problem that the manufacturing cost increases due to the need for the advancement of the electronic device to increase the precision when the precision represented by the physical phenomenon is low.
  • a conventional specific gravity measurement buoy has an outer diameter of 95 mm, an inner diameter of 82 mm, and an outer diameter of an inner diameter of 6.5 mm.
  • the specific gravity measurement buoy of the present invention has an outer diameter of 29 mm, an inner diameter of 23 mm, and an outer diameter of an inner diameter. Is 3 mm. Therefore, the cross-sectional area of the conventional specific gravity measurement buoy is approximately 1806 m 2, but the cross-sectional area of the specific gravity measurement buoy of the present invention is 245 m 2, and the accuracy represented by the physical phenomenon can be improved by approximately 730%.
  • the liquid level and specific gravity measuring apparatus has a measurement error due to the surface tension by adding a guide made of aluminum to minimize the contact area with the probe shaft in the inner through hole of the liquid level measurement buoy and the specific gravity measurement buoy. There is an effect that can be prevented.
  • FIG. 1 is a schematic view showing a device for simultaneously measuring the liquid level and specific gravity of the prior art
  • FIG. 2 is a schematic diagram showing a problem of the apparatus for simultaneously measuring the liquid level and specific gravity shown in FIG.
  • Figure 4 is a side cross-sectional view showing a device for simultaneously measuring the liquid level and specific gravity in accordance with the present invention
  • FIG. 5 is a view of the buoy height measurement buoy shown in FIG.
  • FIG. 6 is a view of the buoyancy measurement buoy shown in FIG.
  • FIG. 10 is a view illustrating a role of a guide according to the present invention.
  • the liquid level measurement buoy is supposed to respond dullly to the change in specific gravity, and the specific gravity measurement buoy is sensitive to the change in specific gravity.
  • the specific gravity measurement buoy 120 is fitted to the lower side of the liquid level height measurement buoy 110 having a relatively large inner diameter
  • the thickness (T1) of the liquid level height measurement buoy 110 and the thickness (T2) of the specific gravity measurement buoy 120 are different so that the sensitivity is different. That is, in the structure of the apparatus according to the present invention, the buoy 110 for measuring the liquid level in the cylindrical shape is located at the upper portion, and the specific gravity measuring buoy 120 in the circumferential shape having a through hole therein is located at the lower portion.
  • the cylindrical specific gravity measurement buoy 120 has a structure whose inner diameter is larger than the outer diameter of the probe shaft 104 to penetrate the probe shaft 104, and the buoy 110 for measuring the liquid level of the cylindrical shape has an inner diameter for the specific gravity measurement. Larger than the upper outer diameter of the buoy 120, the upper portion penetrates the probe shaft 104, and the lower portion surrounds the upper portion of the buoy 120 for specific gravity measurement.
  • the specific gravity value of the liquid to be measured is mainly 0.65 to 1.0, and water is usually defined as 1.0, diesel oil 0.82, gasoline 0.72, and nucleic acid 0.66, and the specific gravity value of the buoy for measurement is 0.55. Therefore, both the liquid level height measurement buoy 110 and the specific gravity measurement buoy 120 are designed to float on the liquid to be measured.
  • the sensitivity of the hydrometer is sensitive as the thickness T ((outer diameter-inner diameter) / 2) of the specific gravity measurement buoy is narrower, and insensitive as the thickness T wider.
  • the thickness T1 ((outer diameter-inner diameter) / 2) of the liquid level measurement buoy 110 is made thicker than the upper thickness T2 of the specific gravity measurement buoy 120 to measure specific gravity.
  • the buoy 120 may operate sensitively to the change in the specific gravity of the liquid, and the liquid level measurement buoy 110 may operate insensitive to the change in the specific gravity of the liquid.
  • the thickness T1 of the buoy 110 for measuring the liquid level is 8 mm
  • the upper thickness T2 of the buoy 120 for specific gravity is designed to be 3 mm.
  • the specific gravity value of the liquid level measurement buoy 110 and the specific gravity measurement buoy 120 is the same value (for example, 0.55)
  • the unit area of the liquid level measurement buoy 110 is the specific gravity measurement buoy 120.
  • the sensitivity of the liquid level measurement buoy 110 is about three times larger than that of the specific gravity measurement buoy 120. For example, in the normal state, when the specific gravity of the liquid is lowered by 0.1, the liquid level buoy 110 for measuring the liquid level is lowered by about 7 mm, but the specific gravity buoy 120 is lowered by about 21 mm.
  • the specific gravity measurement range can be adjusted by the weight 129.
  • the specific gravity measurement buoy 120 is divided into 0.7, 0.8, and 0.9 as the center value.
  • the lower limit value is set to "center value -0.05" and the upper limit value is set to "center value + 0.1".
  • the specific gravity measurement buoy 120 may be measured by applying the center value 0.7.
  • the surface tension of the specific gravity measurement buoy 120 and the liquid level height measurement buoy 110 is minimized by the following method.
  • Specific gravity measurement buoy 120 has a cylindrical shape having a through-hole in the lower cylinder (122a of FIG. 6) and the upper cylinder (122b of FIG. 6) integrally consists of a probe shaft 104 to the center of the columnar Is a structure that penetrates, attaches the guide (126, 128) of the leaf shape to the upper and lower portion of the columnar body.
  • the material of the guides 126 and 128 is aluminum, and the inner diameter of the guide is made larger than the outer diameter of the probe shaft 104 and smaller than the inner diameter of the buoy 120 for specific gravity measurement, and the thickness is 1 mm.
  • the inside of the leaflet guides 126 and 128 is made into a grid to minimize the area where the guides 126 and 128 contact the probe shaft 104.
  • the specific gravity measurement buoy 120 with the guides 126 and 128 attached freely moves the probe shaft 104 up and down, and the influence of the surface tension acting between the specific gravity measurement buoy 120 and the probe shaft 104.
  • the circumferential specific gravity measurement buoy 120 having a through hole therein should be at least 100 mm in length in the circumference, and in the form without a guide, the cylindrical body 122 as shown in FIG.
  • the entire length of 100 mm is the length of the contact with the probe shaft 104 is severely affected by the surface tension and the coefficient of friction, but in the form of the guide (126, 128) in accordance with the present invention as shown in Figure 10 (b) Likewise, only two aluminum guides (126, 128) having a thickness of 1 mm in contact with the probe shaft 104 are hardly affected by surface tension.
  • the material of the specific gravity measurement buoy 120 is NBR, and the surface of the specific gravity measurement buoy has a larger coefficient of friction than aluminum.
  • the device according to the present invention is made of NBR (Nitrile Butadiene Rubber) material of the specific gravity measurement buoy 120, but the contact with the probe shaft 104 is an aluminum guide (126,128), so the influence of the friction coefficient It can be minimized.
  • NBR Nirile Butadiene Rubber
  • the structure is also cylindrical, and the probe shaft 104 penetrates to the upper center of the cylinder, and the structure of the liquid level measurement buoy penetrating the specific gravity measurement buoy 120 to the lower center.
  • the upper part of the 110 is attached to the guide 116 of the leaf shape according to the present invention is to solve the problem of the surface tension acting between the upper portion of the buoy 110 for measuring the liquid level and the probe shaft 104.
  • Figure 4 is a side cross-sectional view showing a device for simultaneously measuring the liquid level and specific gravity in accordance with the present invention
  • Figure 5 is a view of the buoy for measuring the liquid level shown in Figure 4
  • Figure 6 is a specific gravity measurement shown in Figure 4 It is a drawing of a dragon buoy.
  • the liquid level and specific gravity measuring apparatus 100 is a liquid level measurement buoy 110 for floating along the liquid level of the liquid to be measured and the specific gravity of the liquid to be measured. Therefore, when a pulse is applied from the measuring body through the specific gravity measurement buoy 120 and the liquid level measurement buoy 110 and the specific gravity measurement buoy 120 varying in depth from the liquid level, magnetic distortion is applied.
  • the probe shaft 104 is configured to detect the floating position of the buoy 110 for measuring the liquid level and the floating position of the buoy 120 for measuring the specific gravity.
  • the probe shaft 104 penetrates the liquid level measurement buoy 110 and the specific gravity measurement buoy 120 while propagating a pulse applied in the head housing 102 or from a separate measurement body and liquid level.
  • the ultrasonic receiver of the measuring body receives the acoustic wave (ultrasound) from the probe shaft 104, and thus the magnetic corner for measuring the liquid level. (114) and the position of the permanent magnet 124 for specific gravity measurement to determine the liquid level and specific gravity.
  • the probe shaft 104 has a built-in magnetrostrictive wire, which is an electrical device.
  • the buoy 110 for measuring the liquid level has a cylindrical body 112 having a through hole formed in the center thereof and an edge 112 a formed on the inside thereof, and a probe shaft mounted on the edge 112 a.
  • the lower guide 118 is inserted into the lower portion of the body to prevent surface tension from occurring between the buoy 120 for specific gravity measurement.
  • FIG. 5 (a) is a perspective view of the buoy for measuring the liquid level, (b) is a side cross-sectional view, (c) is an upper guide drawing, (d) is a lower guide drawing.
  • the cylindrical body 112 is made of NBR material with a buoyancy of 0.55, the inner diameter is 34 ⁇ , the outer diameter is 50 ⁇ , the thickness T is 8mm.
  • the height of the body is 110mm, of which the magnet area is 12mm.
  • the upper guide 116 is made of aluminum, having a thickness of 1 mm and an inner diameter of 20 mm, having a hole through which the probe shaft 104 penetrates, and four grooves are arranged crosswise.
  • the lower guide 118 is a leaf shape having a thickness of 1 mm and an inner diameter of 30 ⁇ . A hole through which the specific gravity measurement buoy 120 penetrates is formed therein, and a plurality of grooves are formed inside.
  • the specific gravity measurement buoy 120 includes a cylindrical body 122 in which a lower cylinder 122a having a larger outer diameter and a smaller length and an upper cylinder 122b having a smaller inner diameter are integrally combined with each other.
  • the upper guide 126 is inserted into an upper portion of the upper cylinder 122b to prevent the probe shaft 104 from coming into close contact with the surface tension, and the inner side of the lower cylinder 122a comes into close contact with the upper guide 126.
  • Specific gravity measurement magnet 124 that is fixed to the inside of the lower cylinder 122a while keeping the lower guide 128 and the lower guide 128 in close contact with each other to prevent surface tension from being generated.
  • a weight 129 for fitting buoyancy to the interface between the lower cylinder 122a and the upper cylinder 122b.
  • FIG. 6 (a) is a perspective view of a specific gravity measurement buoy, (b) is a side cross-sectional view, (c) is an upper guide drawing, and (d) is a lower guide drawing.
  • the body 122 is composed of a lower cylinder (122a) and the upper cylinder (122b), the buoyancy of 0.55 NBR material, the lower guide (128) inside the lower cylinder (122a)
  • the engaging frame for supporting is formed, the inner diameter of the lower cylinder 122a is 31 phi, 28 phi, outer diameter is 48 phi, and length is 25 mm.
  • the upper cylinder 122b has an inner diameter of 23 ⁇ , an outer diameter of 29 ⁇ , a thickness of 3 mm, and a length of 95 mm.
  • the upper guide 126 has a washer shape having an inner diameter of 20 ⁇ , and a hole through which the probe shaft 104 penetrates is formed therein, and four grooves are arranged crosswise inside.
  • the lower guide 128 has a washer shape having a thickness of 1 mm and an inner diameter of 20 ⁇ , and a hole through which the probe shaft 104 penetrates is formed therein, and four grooves are arranged crosswise inside.
  • the liquid level and specific gravity measuring apparatus measures the liquid level and specific gravity height of the liquid by a magnetic field distortion method, calculates the inventory level in the tank by calculating the volume level relative to the volume of the tank volume, the specific gravity height conversion table It is calculated by the specific gravity value of the liquid.
  • the liquid level can measure the liquid level of the liquid by measuring the distance "a1” from the head 102 to the permanent magnet 114 attached to the liquid level buoy 110 for measuring the liquid level
  • specific gravity height measurement is the liquid level measurement
  • the liquid level measurement buoy 110 and the specific gravity measurement buoy 120 rise higher than usual.
  • the specific gravity values of the liquid level measurement buoy 110 and the specific gravity measurement buoy 120 are the same.
  • the liquid level can be measured by measuring the distance from the head 102 to the permanent magnet 114 attached to the buoy for buoy height measurement.
  • the liquid level of the liquid level before the fluctuation of the specific gravity of the liquid is " a1 "
  • the height of the liquid level after the specific gravity of the liquid is changed is "b1".
  • Specific gravity height can be measured by measuring the liquid level height and the distance from the head 102 to the permanent magnet 124 attached to the specific gravity buoy, and the specific gravity height of the liquid can be measured.
  • a3 a2-a1
  • the liquid level measurement buoy 110 and the specific gravity measurement buoy 120 are lowered than usual. Goes.
  • the thickness T of the liquid level measurement buoy 110 is 8 mm
  • the thickness T of the specific gravity measurement buoy 120 is 3 mm
  • the specific gravity values of the liquid level measurement buoy 110 and the specific gravity measurement buoy 120 are the same.
  • the liquid level may be measured by measuring the distance from the measuring head 102 to the permanent magnet 114 attached to the buoy 110 for measuring the liquid level, and measuring the liquid level of the liquid. "a1”, and the height of the liquid level after the specific gravity of the liquid is changed is "b1".
  • the specific gravity height can be measured by measuring the liquid level and the distance from the head 102 to the permanent magnet 124 attached to the specific gravity buoy 120 to measure the specific gravity height of the liquid, before changing the specific gravity of the liquid.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
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  • Level Indicators Using A Float (AREA)
PCT/KR2013/002457 2012-11-22 2013-03-25 액체의 액면 높이 및 비중을 동시에 측정하는 장치 WO2014081087A1 (ko)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2015543948A JP6013618B2 (ja) 2012-11-22 2013-03-25 液体の液面高さ及び比重を同時に測定する装置
CN201390000926.XU CN204963890U (zh) 2012-11-22 2013-03-25 同时测量液体的液面高度和比重的装置

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KR1020120132895A KR101245268B1 (ko) 2012-11-22 2012-11-22 액체의 액면 높이 및 비중을 동시에 측정하는 장치
KR10-2012-0132895 2012-11-22

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WO2014081087A1 true WO2014081087A1 (ko) 2014-05-30

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CN105928825B (zh) * 2016-04-18 2019-03-01 张立臣 一种便携式介质液位密度检测仪
KR101877889B1 (ko) * 2016-11-07 2018-07-12 한국전력기술 주식회사 전반사 프리즘을 이용한 지시형 수위계
KR102312175B1 (ko) 2020-03-31 2021-10-13 주식회사 플렉스로직 비중 자동 측정기
CN113640176B (zh) * 2021-07-30 2024-02-20 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 石灰乳比重测量方法、装置、系统及计算机可读存储介质

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US20100170338A1 (en) * 2009-01-06 2010-07-08 Veeder-Root Company Magnetostrictive liquid density detector
JP2012002621A (ja) * 2010-06-16 2012-01-05 Tatsuno Corp 密度測定機能付液面測定装置
KR101141961B1 (ko) * 2012-01-12 2012-05-04 (주) 다인레벨 액면높이 및 비중 측정 장치

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